eap_fast.c

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#include "includes.h"

#include "common.h"
#include "eap_i.h"
#include "eap_tls_common.h"
#include "config_ssid.h"
#include "tls.h"
#include "eap_tlv.h"
#include "sha1.h"
#include "config.h"

/* TODO:
 * - encrypt PAC-Key in the PAC file
 * - test session resumption and enable it if it interoperates
 * - password change (pending mschapv2 packet; replay decrypted packet)
 */

#define EAP_FAST_VERSION 1
#define EAP_FAST_KEY_LEN 64
#define EAP_FAST_PAC_KEY_LEN 32
#define EAP_FAST_SIMCK_LEN 40
#define EAP_FAST_SKS_LEN 40

#define TLS_EXT_PAC_OPAQUE 35

static const char *pac_file_hdr =
        "wpa_supplicant EAP-FAST PAC file - version 1";


static void eap_fast_deinit(struct eap_sm *sm, void *priv);


#define PAC_TYPE_PAC_KEY 1
#define PAC_TYPE_PAC_OPAQUE 2
#define PAC_TYPE_CRED_LIFETIME 3
#define PAC_TYPE_A_ID 4
#define PAC_TYPE_I_ID 5
#define PAC_TYPE_SERVER_PROTECTED_DATA 6
#define PAC_TYPE_A_ID_INFO 7
#define PAC_TYPE_PAC_ACKNOWLEDGEMENT 8
#define PAC_TYPE_PAC_INFO 9

struct pac_tlv_hdr {
        u16 type;
        u16 len;
};


/* draft-cam-winget-eap-fast-provisioning-01.txt:
 * 3.4 Key Derivations Used in the EAP-FAST Provisioning Exchange */
struct eap_fast_key_block_provisioning {
        /* Extra key material after TLS key_block */
        u8 session_key_seed[EAP_FAST_SKS_LEN];
        u8 server_challenge[16];
        u8 client_challenge[16];
};


struct eap_fast_pac {
        struct eap_fast_pac *next;

        u8 pac_key[EAP_FAST_PAC_KEY_LEN];
        u8 *pac_opaque;
        size_t pac_opaque_len;
        u8 *pac_info;
        size_t pac_info_len;
        u8 *a_id;
        size_t a_id_len;
        u8 *i_id;
        size_t i_id_len;
        u8 *a_id_info;
        size_t a_id_info_len;
};


struct eap_fast_data {
        struct eap_ssl_data ssl;

        int fast_version;

        const struct eap_method *phase2_method;
        void *phase2_priv;
        int phase2_success;

        struct eap_method_type phase2_type;
        struct eap_method_type *phase2_types;
        size_t num_phase2_types;
        int resuming; /* starting a resumed session */
        struct eap_fast_key_block_provisioning *key_block_p;
        int provisioning_allowed; /* is PAC provisioning allowed */
        int provisioning; /* doing PAC provisioning (not the normal auth) */

        u8 key_data[EAP_FAST_KEY_LEN];
        u8 emsk[EAP_EMSK_LEN];
        int success;

        struct eap_fast_pac *pac;
        struct eap_fast_pac *current_pac;

        int tls_master_secret_set;

        u8 simck[EAP_FAST_SIMCK_LEN];
        int simck_idx;
};


static void eap_fast_free_pac(struct eap_fast_pac *pac)
{
        os_free(pac->pac_opaque);
        os_free(pac->pac_info);
        os_free(pac->a_id);
        os_free(pac->i_id);
        os_free(pac->a_id_info);
        os_free(pac);
}


static struct eap_fast_pac * eap_fast_get_pac(struct eap_fast_data *data,
                                              const u8 *a_id, size_t a_id_len)
{
        struct eap_fast_pac *pac = data->pac;

        while (pac) {
                if (pac->a_id_len == a_id_len &&
                    os_memcmp(pac->a_id, a_id, a_id_len) == 0) {
                        return pac;
                }
                pac = pac->next;
        }
        return NULL;
}


static int eap_fast_add_pac(struct eap_fast_data *data,
                            struct eap_fast_pac *entry)
{
        struct eap_fast_pac *pac, *prev;

        if (entry == NULL || entry->a_id == NULL)
                return -1;

        /* Remove a possible old entry for the matching A-ID. */
        pac = data->pac;
        prev = NULL;
        while (pac) {
                if (pac->a_id_len == entry->a_id_len &&
                    os_memcmp(pac->a_id, entry->a_id, pac->a_id_len) == 0) {
                        if (prev == NULL) {
                                data->pac = pac->next;
                        } else {
                                prev->next = pac->next;
                        }
                        if (data->current_pac == pac)
                                data->current_pac = NULL;
                        eap_fast_free_pac(pac);
                        break;
                }
                prev = pac;
                pac = pac->next;
        }

        /* Allocate a new entry and add it to the list of PACs. */
        pac = os_zalloc(sizeof(*pac));
        if (pac == NULL)
                return -1;

        os_memcpy(pac->pac_key, entry->pac_key, EAP_FAST_PAC_KEY_LEN);
        if (entry->pac_opaque) {
                pac->pac_opaque = os_malloc(entry->pac_opaque_len);
                if (pac->pac_opaque == NULL) {
                        eap_fast_free_pac(pac);
                        return -1;
                }
                os_memcpy(pac->pac_opaque, entry->pac_opaque,
                          entry->pac_opaque_len);
                pac->pac_opaque_len = entry->pac_opaque_len;
        }
        if (entry->pac_info) {
                pac->pac_info = os_malloc(entry->pac_info_len);
                if (pac->pac_info == NULL) {
                        eap_fast_free_pac(pac);
                        return -1;
                }
                os_memcpy(pac->pac_info, entry->pac_info,
                          entry->pac_info_len);
                pac->pac_info_len = entry->pac_info_len;
        }
        if (entry->a_id) {
                pac->a_id = os_malloc(entry->a_id_len);
                if (pac->a_id == NULL) {
                        eap_fast_free_pac(pac);
                        return -1;
                }
                os_memcpy(pac->a_id, entry->a_id,
                          entry->a_id_len);
                pac->a_id_len = entry->a_id_len;
        }
        if (entry->i_id) {
                pac->i_id = os_malloc(entry->i_id_len);
                if (pac->i_id == NULL) {
                        eap_fast_free_pac(pac);
                        return -1;
                }
                os_memcpy(pac->i_id, entry->i_id,
                          entry->i_id_len);
                pac->i_id_len = entry->i_id_len;
        }
        if (entry->a_id_info) {
                pac->a_id_info = os_malloc(entry->a_id_info_len);
                if (pac->a_id_info == NULL) {
                        eap_fast_free_pac(pac);
                        return -1;
                }
                os_memcpy(pac->a_id_info, entry->a_id_info,
                          entry->a_id_info_len);
                pac->a_id_info_len = entry->a_id_info_len;
        }
        pac->next = data->pac;
        data->pac = pac;
        return 0;
}


struct eap_fast_read_ctx {
        FILE *f;
        const char *pos;
        const char *end;
};

static int eap_fast_read_line(struct eap_fast_read_ctx *rc, char *buf,
                              size_t buf_len)
{
        char *pos;

        if (rc->f) {
                if (fgets(buf, buf_len, rc->f) == NULL)
                        return -1;
        } else {
                const char *l_end;
                size_t len;
                if (rc->pos >= rc->end)
                        return -1;
                l_end = rc->pos;
                while (l_end < rc->end && *l_end != '\n')
                        l_end++;
                len = l_end - rc->pos;
                if (len >= buf_len)
                        len = buf_len - 1;
                os_memcpy(buf, rc->pos, len);
                buf[len] = '\0';
                rc->pos = l_end + 1;
        }

        buf[buf_len - 1] = '\0';
        pos = buf;
        while (*pos != '\0') {
                if (*pos == '\n' || *pos == '\r') {
                        *pos = '\0';
                        break;
                }
                pos++;
        }

        return 0;
}


static u8 * eap_fast_parse_hex(const char *value, size_t *len)
{
        int hlen;
        u8 *buf;

        if (value == NULL)
                return NULL;
        hlen = os_strlen(value);
        if (hlen & 1)
                return NULL;
        *len = hlen / 2;
        buf = os_malloc(*len);
        if (buf == NULL)
                return NULL;
        if (hexstr2bin(value, buf, *len)) {
                os_free(buf);
                return NULL;
        }
        return buf;
}


static int eap_fast_load_pac(struct eap_sm *sm, struct eap_fast_data *data,
                             const char *pac_file)
{
        struct eap_fast_read_ctx rc;
        struct eap_fast_pac *pac = NULL;
        int count = 0;
        char *buf, *pos;
        const int buf_len = 2048;
        int ret = 0, line = 0;

        if (pac_file == NULL)
                return -1;

        os_memset(&rc, 0, sizeof(rc));

        if (os_strncmp(pac_file, "blob://", 7) == 0) {
                const struct wpa_config_blob *blob;
                blob = eap_get_config_blob(sm, pac_file + 7);
                if (blob == NULL) {
                        wpa_printf(MSG_INFO, "EAP-FAST: No PAC blob '%s' - "
                                   "assume no PAC entries have been "
                                   "provisioned", pac_file + 7);
                        return 0;
                }
                rc.pos = (char *) blob->data;
                rc.end = (char *) blob->data + blob->len;
        } else {
                rc.f = fopen(pac_file, "r");
                if (rc.f == NULL) {
                        wpa_printf(MSG_INFO, "EAP-FAST: No PAC file '%s' - "
                                   "assume no PAC entries have been "
                                   "provisioned", pac_file);
                        return 0;
                }
        }

        buf = os_malloc(buf_len);
        if (buf == NULL) {
                return -1;
        }

        line++;
        if (eap_fast_read_line(&rc, buf, buf_len) < 0 ||
            os_strcmp(pac_file_hdr, buf) != 0) {
                wpa_printf(MSG_INFO, "EAP-FAST: Unrecognized header line in "
                           "PAC file '%s'", pac_file);
                os_free(buf);
                if (rc.f)
                        fclose(rc.f);
                return -1;
        }

        while (eap_fast_read_line(&rc, buf, buf_len) == 0) {
                line++;
                pos = os_strchr(buf, '=');
                if (pos) {
                        *pos++ = '\0';
                }

                if (os_strcmp(buf, "START") == 0) {
                        if (pac) {
                                wpa_printf(MSG_INFO, "EAP-FAST: START line "
                                           "without END in '%s:%d'",
                                           pac_file, line);
                                ret = -1;
                                break;
                        }
                        pac = os_zalloc(sizeof(*pac));
                        if (pac == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: No memory for "
                                           "PAC entry");
                                ret = -1;
                                break;
                        }
                } else if (os_strcmp(buf, "END") == 0) {
                        if (pac == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: END line "
                                           "without START in '%s:%d'",
                                           pac_file, line);
                                ret = -1;
                                break;
                        }
                        pac->next = data->pac;
                        data->pac = pac;
                        pac = NULL;
                        count++;
                } else if (pac && os_strcmp(buf, "PAC-Key") == 0) {
                        u8 *key;
                        size_t key_len;
                        key = eap_fast_parse_hex(pos, &key_len);
                        if (key == NULL || key_len != EAP_FAST_PAC_KEY_LEN) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Invalid "
                                           "PAC-Key '%s:%d'", pac_file, line);
                                ret = -1;
                                os_free(key);
                                break;
                        }

                        os_memcpy(pac->pac_key, key, EAP_FAST_PAC_KEY_LEN);
                        os_free(key);
                } else if (pac && os_strcmp(buf, "PAC-Opaque") == 0) {
                        os_free(pac->pac_opaque);
                        pac->pac_opaque =
                                eap_fast_parse_hex(pos, &pac->pac_opaque_len);
                        if (pac->pac_opaque == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Invalid "
                                           "PAC-Opaque '%s:%d'",
                                           pac_file, line);
                                ret = -1;
                                break;
                        }
                } else if (pac && os_strcmp(buf, "A-ID") == 0) {
                        os_free(pac->a_id);
                        pac->a_id = eap_fast_parse_hex(pos, &pac->a_id_len);
                        if (pac->a_id == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Invalid "
                                           "A-ID '%s:%d'", pac_file, line);
                                ret = -1;
                                break;
                        }
                } else if (pac && os_strcmp(buf, "I-ID") == 0) {
                        os_free(pac->i_id);
                        pac->i_id = eap_fast_parse_hex(pos, &pac->i_id_len);
                        if (pac->i_id == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Invalid "
                                           "I-ID '%s:%d'", pac_file, line);
                                ret = -1;
                                break;
                        }
                } else if (pac && os_strcmp(buf, "A-ID-Info") == 0) {
                        os_free(pac->a_id_info);
                        pac->a_id_info =
                                eap_fast_parse_hex(pos, &pac->a_id_info_len);
                        if (pac->a_id_info == NULL) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Invalid "
                                           "A-ID-Info '%s:%d'",
                                           pac_file, line);
                                ret = -1;
                                break;
                        }
                }
        }

        if (pac) {
                wpa_printf(MSG_INFO, "EAP-FAST: PAC block not terminated with "
                           "END in '%s'", pac_file);
                eap_fast_free_pac(pac);
                ret = -1;
        }

        os_free(buf);
        if (rc.f)
                fclose(rc.f);

        if (ret == 0) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: read %d PAC entries from "
                           "'%s'", count, pac_file);
        }

        return ret;
}


static void eap_fast_write(char **buf, char **pos, size_t *buf_len,
                           const char *field, const u8 *data,
                           size_t len, int txt)
{
        size_t i, need;
        int ret;

        if (data == NULL || *buf == NULL)
                return;

        need = os_strlen(field) + len * 2 + 30;
        if (txt)
                need += os_strlen(field) + len + 20;

        if (*pos - *buf + need > *buf_len) {
                char *nbuf = os_realloc(*buf, *buf_len + need);
                if (nbuf == NULL) {
                        os_free(*buf);
                        *buf = NULL;
                        return;
                }
                *buf = nbuf;
                *buf_len += need;
        }

        ret = os_snprintf(*pos, *buf + *buf_len - *pos, "%s=", field);
        if (ret < 0 || ret >= *buf + *buf_len - *pos)
                return;
        *pos += ret;
        *pos += wpa_snprintf_hex(*pos, *buf + *buf_len - *pos, data, len);
        ret = os_snprintf(*pos, *buf + *buf_len - *pos, "\n");
        if (ret < 0 || ret >= *buf + *buf_len - *pos)
                return;
        *pos += ret;

        if (txt) {
                ret = os_snprintf(*pos, *buf + *buf_len - *pos,
                                  "%s-txt=", field);
                if (ret < 0 || ret >= *buf + *buf_len - *pos)
                        return;
                *pos += ret;
                for (i = 0; i < len; i++) {
                        ret = os_snprintf(*pos, *buf + *buf_len - *pos,
                                          "%c", data[i]);
                        if (ret < 0 || ret >= *buf + *buf_len - *pos)
                                return;
                        *pos += ret;
                }
                ret = os_snprintf(*pos, *buf + *buf_len - *pos, "\n");
                if (ret < 0 || ret >= *buf + *buf_len - *pos)
                        return;
                *pos += ret;
        }
}


static int eap_fast_save_pac(struct eap_sm *sm, struct eap_fast_data *data,
                             const char *pac_file)
{
        FILE *f;
        struct eap_fast_pac *pac;
        int count = 0, ret;
        char *buf, *pos;
        size_t buf_len;

        if (pac_file == NULL)
                return -1;

        buf_len = 1024;
        pos = buf = os_malloc(buf_len);
        if (buf == NULL)
                return -1;

        ret = os_snprintf(pos, buf + buf_len - pos, "%s\n", pac_file_hdr);
        if (ret < 0 || ret >= buf + buf_len - pos) {
                os_free(buf);
                return -1;
        }
        pos += ret;

        pac = data->pac;
        while (pac) {
                ret = os_snprintf(pos, buf + buf_len - pos, "START\n");
                if (ret < 0 || ret >= buf + buf_len - pos) {
                        os_free(buf);
                        return -1;
                }
                pos += ret;
                eap_fast_write(&buf, &pos, &buf_len, "PAC-Key", pac->pac_key,
                               EAP_FAST_PAC_KEY_LEN, 0);
                eap_fast_write(&buf, &pos, &buf_len, "PAC-Opaque",
                               pac->pac_opaque, pac->pac_opaque_len, 0);
                eap_fast_write(&buf, &pos, &buf_len, "PAC-Info", pac->pac_info,
                               pac->pac_info_len, 0);
                eap_fast_write(&buf, &pos, &buf_len, "A-ID", pac->a_id,
                               pac->a_id_len, 0);
                eap_fast_write(&buf, &pos, &buf_len, "I-ID", pac->i_id,
                               pac->i_id_len, 1);
                eap_fast_write(&buf, &pos, &buf_len, "A-ID-Info",
                               pac->a_id_info, pac->a_id_info_len, 1);
                if (buf == NULL) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: No memory for PAC "
                                   "data");
                        return -1;
                }
                ret = os_snprintf(pos, buf + buf_len - pos, "END\n");
                if (ret < 0 || ret >= buf + buf_len - pos) {
                        os_free(buf);
                        return -1;
                }
                pos += ret;
                count++;
                pac = pac->next;
        }

        if (os_strncmp(pac_file, "blob://", 7) == 0) {
                struct wpa_config_blob *blob;
                blob = os_zalloc(sizeof(*blob));
                if (blob == NULL) {
                        os_free(buf);
                        return -1;
                }
                blob->data = (u8 *) buf;
                blob->len = pos - buf;
                buf = NULL;
                blob->name = os_strdup(pac_file + 7);
                if (blob->name == NULL) {
                        os_free(blob->data);
                        os_free(blob);
                        return -1;
                }
                eap_set_config_blob(sm, blob);
        } else {
                f = fopen(pac_file, "w");
                if (f == NULL) {
                        wpa_printf(MSG_INFO, "EAP-FAST: Failed to open PAC "
                                   "file '%s' for writing", pac_file);
                        os_free(buf);
                        return -1;
                }
                fprintf(f, "%s", buf);
                os_free(buf);
                fclose(f);
        }

        wpa_printf(MSG_DEBUG, "EAP-FAST: wrote %d PAC entries into '%s'",
                   count, pac_file);

        return 0;
}


static void * eap_fast_init(struct eap_sm *sm)
{
        struct eap_fast_data *data;
        struct wpa_ssid *config = eap_get_config(sm);

        data = os_zalloc(sizeof(*data));
        if (data == NULL)
                return NULL;
        data->fast_version = EAP_FAST_VERSION;

        if (config && config->phase1) {
                if (os_strstr(config->phase1, "fast_provisioning=1")) {
                        data->provisioning_allowed = 1;
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Automatic PAC "
                                   "provisioning is allowed");
                }
        }

        if (config && config->phase2) {
                char *start, *pos, *buf;
                struct eap_method_type *methods = NULL, *_methods;
                u8 method;
                size_t num_methods = 0;
                start = buf = os_strdup(config->phase2);
                if (buf == NULL) {
                        eap_fast_deinit(sm, data);
                        return NULL;
                }
                while (start && *start != '\0') {
                        int vendor;
                        pos = os_strstr(start, "auth=");
                        if (pos == NULL)
                                break;
                        if (start != pos && *(pos - 1) != ' ') {
                                start = pos + 5;
                                continue;
                        }

                        start = pos + 5;
                        pos = os_strchr(start, ' ');
                        if (pos)
                                *pos++ = '\0';
                        method = eap_get_phase2_type(start, &vendor);
                        if (vendor == EAP_VENDOR_IETF &&
                            method == EAP_TYPE_NONE) {
                                wpa_printf(MSG_ERROR, "EAP-FAST: Unsupported "
                                           "Phase2 method '%s'", start);
                        } else {
                                num_methods++;
                                _methods = os_realloc(
                                        methods,
                                        num_methods * sizeof(*methods));
                                if (_methods == NULL) {
                                        os_free(methods);
                                        os_free(buf);
                                        eap_fast_deinit(sm, data);
                                        return NULL;
                                }
                                methods = _methods;
                                methods[num_methods - 1].vendor = vendor;
                                methods[num_methods - 1].method = method;
                        }

                        start = pos;
                }
                os_free(buf);
                data->phase2_types = methods;
                data->num_phase2_types = num_methods;
        }
        if (data->phase2_types == NULL) {
                data->phase2_types =
                        eap_get_phase2_types(config, &data->num_phase2_types);
        }
        if (data->phase2_types == NULL) {
                wpa_printf(MSG_ERROR, "EAP-FAST: No Phase2 method available");
                eap_fast_deinit(sm, data);
                return NULL;
        }
        wpa_hexdump(MSG_DEBUG, "EAP-FAST: Phase2 EAP types",
                    (u8 *) data->phase2_types,
                    data->num_phase2_types * sizeof(struct eap_method_type));
        data->phase2_type.vendor = EAP_VENDOR_IETF;
        data->phase2_type.method = EAP_TYPE_NONE;

        if (eap_tls_ssl_init(sm, &data->ssl, config)) {
                wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL.");
                eap_fast_deinit(sm, data);
                return NULL;
        }

        /* The local RADIUS server in a Cisco AP does not seem to like empty
         * fragments before data, so disable that workaround for CBC.
         * TODO: consider making this configurable */
        tls_connection_enable_workaround(sm->ssl_ctx, data->ssl.conn);

        if (eap_fast_load_pac(sm, data, config->pac_file) < 0) {
                eap_fast_deinit(sm, data);
                return NULL;
        }

        if (data->pac == NULL && !data->provisioning_allowed) {
                wpa_printf(MSG_INFO, "EAP-FAST: No PAC configured and "
                           "provisioning disabled");
                eap_fast_deinit(sm, data);
                return NULL;
        }

        return data;
}


static void eap_fast_deinit(struct eap_sm *sm, void *priv)
{
        struct eap_fast_data *data = priv;
        struct eap_fast_pac *pac, *prev;

        if (data == NULL)
                return;
        if (data->phase2_priv && data->phase2_method)
                data->phase2_method->deinit(sm, data->phase2_priv);
        os_free(data->phase2_types);
        os_free(data->key_block_p);
        eap_tls_ssl_deinit(sm, &data->ssl);

        pac = data->pac;
        prev = NULL;
        while (pac) {
                prev = pac;
                pac = pac->next;
                eap_fast_free_pac(prev);
        }
        os_free(data);
}


static int eap_fast_encrypt(struct eap_sm *sm, struct eap_fast_data *data,
                            int id, const u8 *plain, size_t plain_len,
                            u8 **out_data, size_t *out_len)
{
        int res;
        u8 *pos;
        struct eap_hdr *resp;

        /* TODO: add support for fragmentation, if needed. This will need to
         * add TLS Message Length field, if the frame is fragmented. */
        resp = os_malloc(sizeof(struct eap_hdr) + 2 + data->ssl.tls_out_limit);
        if (resp == NULL)
                return 0;

        resp->code = EAP_CODE_RESPONSE;
        resp->identifier = id;

        pos = (u8 *) (resp + 1);
        *pos++ = EAP_TYPE_FAST;
        *pos++ = data->fast_version;

        res = tls_connection_encrypt(sm->ssl_ctx, data->ssl.conn,
                                     plain, plain_len,
                                     pos, data->ssl.tls_out_limit);
        if (res < 0) {
                wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt Phase 2 "
                           "data");
                os_free(resp);
                return 0;
        }

        *out_len = sizeof(struct eap_hdr) + 2 + res;
        resp->length = host_to_be16(*out_len);
        *out_data = (u8 *) resp;
        return 0;
}


static int eap_fast_phase2_nak(struct eap_fast_data *data,
                               struct eap_hdr *hdr,
                               u8 **resp, size_t *resp_len)
{
        struct eap_hdr *resp_hdr;
        u8 *pos = (u8 *) (hdr + 1);
        size_t i;

        /* TODO: add support for expanded Nak */
        wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: Nak type=%d", *pos);
        wpa_hexdump(MSG_DEBUG, "EAP-FAST: Allowed Phase2 EAP types",
                    (u8 *) data->phase2_types,
                    data->num_phase2_types * sizeof(struct eap_method_type));
        *resp_len = sizeof(struct eap_hdr) + 1;
        *resp = os_malloc(*resp_len + data->num_phase2_types);
        if (*resp == NULL)
                return -1;

        resp_hdr = (struct eap_hdr *) (*resp);
        resp_hdr->code = EAP_CODE_RESPONSE;
        resp_hdr->identifier = hdr->identifier;
        pos = (u8 *) (resp_hdr + 1);
        *pos++ = EAP_TYPE_NAK;
        for (i = 0; i < data->num_phase2_types; i++) {
                if (data->phase2_types[i].vendor == EAP_VENDOR_IETF &&
                    data->phase2_types[i].method < 256) {
                        (*resp_len)++;
                        *pos++ = data->phase2_types[i].method;
                }
        }
        resp_hdr->length = host_to_be16(*resp_len);

        return 0;
}


static int eap_fast_derive_msk(struct eap_fast_data *data)
{
        /* Derive EAP Master Session Keys (section 5.4) */
        sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
                   "Session Key Generating Function", (u8 *) "", 0,
                   data->key_data, EAP_FAST_KEY_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: Derived key (MSK)",
                        data->key_data, EAP_FAST_KEY_LEN);

        sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
                   "Extended Session Key Generating Function",
                   (u8 *) "", 0, data->emsk, EAP_EMSK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: Derived key (EMSK)",
                        data->emsk, EAP_EMSK_LEN);

        data->success = 1;

        return 0;
}


static int eap_fast_set_tls_master_secret(struct eap_sm *sm,
                                          struct eap_fast_data *data,
                                          const u8 *tls, size_t tls_len)
{
        struct tls_keys keys;
        u8 master_secret[48], *seed;
        const u8 *server_random;
        size_t seed_len, server_random_len;

        if (data->tls_master_secret_set || !data->current_pac ||
            tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
            keys.client_random == NULL) {
                return 0;
        }

        wpa_hexdump(MSG_DEBUG, "EAP-FAST: client_random",
                    keys.client_random, keys.client_random_len);

        /* TLS master secret is needed before TLS library has processed this
         * message which includes both ServerHello and an encrypted handshake
         * message, so we need to parse server_random from this message before
         * passing it to TLS library.
         *
         * Example TLS packet header:
         * (16 03 01 00 2a 02 00 00 26 03 01 <32 bytes server_random>)
         * Content Type: Handshake: 0x16
         * Version: TLS 1.0 (0x0301)
         * Lenghth: 42 (0x002a)
         * Handshake Type: Server Hello: 0x02
         * Length: 38 (0x000026)
         * Version TLS 1.0 (0x0301)
         * Random: 32 bytes
         */
        if (tls_len < 43 || tls[0] != 0x16 ||
            tls[1] != 0x03 || tls[2] != 0x01 ||
            tls[5] != 0x02 || tls[9] != 0x03 || tls[10] != 0x01) {
                wpa_hexdump(MSG_DEBUG, "EAP-FAST: unrecognized TLS "
                            "ServerHello", tls, tls_len);
                return -1;
        }
        server_random = tls + 11;
        server_random_len = 32;
        wpa_hexdump(MSG_DEBUG, "EAP-FAST: server_random",
                    server_random, server_random_len);

        seed_len = keys.client_random_len + server_random_len;
        seed = os_malloc(seed_len);
        if (seed == NULL)
                return -1;
        os_memcpy(seed, server_random, server_random_len);
        os_memcpy(seed + server_random_len,
                  keys.client_random, keys.client_random_len);

        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: T-PRF seed", seed, seed_len);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: PAC-Key",
                        data->current_pac->pac_key, EAP_FAST_PAC_KEY_LEN);
        /* master_secret = T-PRF(PAC-Key, "PAC to master secret label hash", 
         * server_random + client_random, 48) */
        sha1_t_prf(data->current_pac->pac_key, EAP_FAST_PAC_KEY_LEN,
                   "PAC to master secret label hash",
                   seed, seed_len, master_secret, sizeof(master_secret));
        os_free(seed);
        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: TLS pre-master-secret",
                        master_secret, sizeof(master_secret));

        data->tls_master_secret_set = 1;

        return tls_connection_set_master_key(sm->ssl_ctx, data->ssl.conn,
                                             master_secret,
                                             sizeof(master_secret));
}


static u8 * eap_fast_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
                                char *label, size_t len)
{
        struct tls_keys keys;
        u8 *rnd = NULL, *out;
        int block_size;

        block_size = tls_connection_get_keyblock_size(sm->ssl_ctx, data->conn);
        if (block_size < 0)
                return NULL;

        out = os_malloc(block_size + len);
        if (out == NULL)
                return NULL;

        if (tls_connection_prf(sm->ssl_ctx, data->conn, label, 1, out,
                               block_size + len) == 0) {
                os_memmove(out, out + block_size, len);
                return out;
        }

        if (tls_connection_get_keys(sm->ssl_ctx, data->conn, &keys))
                goto fail;

        rnd = os_malloc(keys.client_random_len + keys.server_random_len);
        if (rnd == NULL)
                goto fail;

        os_memcpy(rnd, keys.server_random, keys.server_random_len);
        os_memcpy(rnd + keys.server_random_len, keys.client_random,
                  keys.client_random_len);

        wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: master_secret for key "
                        "expansion", keys.master_key, keys.master_key_len);
        if (tls_prf(keys.master_key, keys.master_key_len,
                    label, rnd, keys.client_random_len +
                    keys.server_random_len, out, block_size + len))
                goto fail;
        os_free(rnd);
        os_memmove(out, out + block_size, len);
        return out;

fail:
        os_free(rnd);
        os_free(out);
        return NULL;
}


static void eap_fast_derive_key_auth(struct eap_sm *sm,
                                     struct eap_fast_data *data)
{
        u8 *sks;

        /* draft-cam-winget-eap-fast-05.txt:
         * 5.1 EAP-FAST Authentication Phase 1: Key Derivations
         * Extra key material after TLS key_block: session_ket_seed[40]
         */

        sks = eap_fast_derive_key(sm, &data->ssl, "key expansion",
                                  EAP_FAST_SKS_LEN);
        if (sks == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive "
                           "session_key_seed");
                return;
        }

        /*
         * draft-cam-winget-eap-fast-05.txt, 5.2:
         * S-IMCK[0] = session_key_seed
         */
        wpa_hexdump_key(MSG_DEBUG,
                        "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
                        sks, EAP_FAST_SKS_LEN);
        data->simck_idx = 0;
        os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN);
        os_free(sks);
}


static void eap_fast_derive_key_provisioning(struct eap_sm *sm,
                                             struct eap_fast_data *data)
{
        os_free(data->key_block_p);
        data->key_block_p = (struct eap_fast_key_block_provisioning *)
                eap_fast_derive_key(sm, &data->ssl, "key expansion",
                                    sizeof(*data->key_block_p));
        if (data->key_block_p == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
                return;
        }
        /*
         * draft-cam-winget-eap-fast-05.txt, 5.2:
         * S-IMCK[0] = session_key_seed
         */
        wpa_hexdump_key(MSG_DEBUG,
                        "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
                        data->key_block_p->session_key_seed,
                        sizeof(data->key_block_p->session_key_seed));
        data->simck_idx = 0;
        os_memcpy(data->simck, data->key_block_p->session_key_seed,
                  EAP_FAST_SIMCK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
                        data->key_block_p->server_challenge,
                        sizeof(data->key_block_p->server_challenge));
        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
                        data->key_block_p->client_challenge,
                        sizeof(data->key_block_p->client_challenge));
}


static void eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
{
        if (data->current_pac) {
                eap_fast_derive_key_auth(sm, data);
        } else {
                eap_fast_derive_key_provisioning(sm, data);
        }
}


static int eap_fast_phase2_request(struct eap_sm *sm,
                                   struct eap_fast_data *data,
                                   struct eap_method_ret *ret,
                                   struct eap_hdr *hdr,
                                   u8 **resp, size_t *resp_len)
{
        size_t len = be_to_host16(hdr->length);
        u8 *pos;
        struct eap_method_ret iret;

        if (len <= sizeof(struct eap_hdr)) {
                wpa_printf(MSG_INFO, "EAP-FAST: too short "
                           "Phase 2 request (len=%lu)", (unsigned long) len);
                return -1;
        }
        pos = (u8 *) (hdr + 1);
        wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%d", *pos);
        switch (*pos) {
        case EAP_TYPE_IDENTITY:
                *resp = eap_sm_buildIdentity(sm, hdr->identifier, resp_len, 1);
                break;
        default:
                if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
                    data->phase2_type.method == EAP_TYPE_NONE) {
                        size_t i;
                        for (i = 0; i < data->num_phase2_types; i++) {
                                if (data->phase2_types[i].vendor !=
                                    EAP_VENDOR_IETF ||
                                    data->phase2_types[i].method != *pos)
                                        continue;

                                data->phase2_type.vendor =
                                        data->phase2_types[i].vendor;
                                data->phase2_type.method =
                                        data->phase2_types[i].method;
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Selected "
                                           "Phase 2 EAP vendor %d method %d",
                                           data->phase2_type.vendor,
                                           data->phase2_type.method);
                                break;
                        }
                }
                if (*pos != data->phase2_type.method ||
                    *pos == EAP_TYPE_NONE) {
                        if (eap_fast_phase2_nak(data, hdr, resp, resp_len))
                                return -1;
                        return 0;
                }

                if (data->phase2_priv == NULL) {
                        data->phase2_method = eap_sm_get_eap_methods(
                                data->phase2_type.vendor,
                                data->phase2_type.method);
                        if (data->phase2_method) {
                                if (data->key_block_p) {
                                        sm->auth_challenge =
                                                data->key_block_p->
                                                server_challenge;
                                        sm->peer_challenge =
                                                data->key_block_p->
                                                client_challenge;
                                }
                                sm->init_phase2 = 1;
                                sm->mschapv2_full_key = 1;
                                data->phase2_priv =
                                        data->phase2_method->init(sm);
                                sm->init_phase2 = 0;
                                sm->mschapv2_full_key = 0;
                                sm->auth_challenge = NULL;
                                sm->peer_challenge = NULL;
                        }
                }
                if (data->phase2_priv == NULL || data->phase2_method == NULL) {
                        wpa_printf(MSG_INFO, "EAP-FAST: failed to initialize "
                                   "Phase 2 EAP method %d", *pos);
                        ret->methodState = METHOD_DONE;
                        ret->decision = DECISION_FAIL;
                        return -1;
                }
                os_memset(&iret, 0, sizeof(iret));
                *resp = data->phase2_method->process(sm, data->phase2_priv,
                                                     &iret, (u8 *) hdr, len,
                                                     resp_len);
                if (*resp == NULL ||
                    (iret.methodState == METHOD_DONE &&
                     iret.decision == DECISION_FAIL)) {
                        ret->methodState = METHOD_DONE;
                        ret->decision = DECISION_FAIL;
                } else if ((iret.methodState == METHOD_DONE ||
                            iret.methodState == METHOD_MAY_CONT) &&
                           (iret.decision == DECISION_UNCOND_SUCC ||
                            iret.decision == DECISION_COND_SUCC)) {
                        data->phase2_success = 1;
                }
                if (*resp == NULL)
                        return -1;
                break;
        }
        return 0;
}


static u8 * eap_fast_tlv_nak(int vendor_id, int tlv_type, size_t *len)
{
        struct eap_tlv_nak_tlv *nak;
        *len = sizeof(*nak);
        nak = os_malloc(*len);
        if (nak == NULL)
                return NULL;
        nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
        nak->length = host_to_be16(6);
        nak->vendor_id = host_to_be32(vendor_id);
        nak->nak_type = host_to_be16(tlv_type);
        return (u8 *) nak;
}


static u8 * eap_fast_tlv_result(int status, int intermediate, size_t *len)
{
        struct eap_tlv_intermediate_result_tlv *result;
        *len = sizeof(*result);
        result = os_malloc(*len);
        if (result == NULL)
                return NULL;
        result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
                                        (intermediate ?
                                         EAP_TLV_INTERMEDIATE_RESULT_TLV :
                                         EAP_TLV_RESULT_TLV));
        result->length = host_to_be16(2);
        result->status = host_to_be16(status);
        return (u8 *) result;
}


static u8 * eap_fast_tlv_pac_ack(size_t *len)
{
        struct eap_tlv_result_tlv *res;
        struct eap_tlv_pac_ack_tlv *ack;

        *len = sizeof(*res) + sizeof(*ack);
        res = os_zalloc(*len);
        if (res == NULL)
                return NULL;

        res->tlv_type = host_to_be16(EAP_TLV_RESULT_TLV |
                                     EAP_TLV_TYPE_MANDATORY);
        res->length = host_to_be16(sizeof(*res) - sizeof(struct eap_tlv_hdr));
        res->status = host_to_be16(EAP_TLV_RESULT_SUCCESS);

        ack = (struct eap_tlv_pac_ack_tlv *) (res + 1);
        ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
                                     EAP_TLV_TYPE_MANDATORY);
        ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
        ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
        ack->pac_len = host_to_be16(2);
        ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);

        return (u8 *) res;
}


static u8 * eap_fast_tlv_eap_payload(u8 *buf, size_t *len)
{
        struct eap_tlv_hdr *tlv;

        /* Encapsulate EAP packet in EAP Payload TLV */
        tlv = os_malloc(sizeof(*tlv) + *len);
        if (tlv == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to "
                           "allocate memory for TLV "
                           "encapsulation");
                os_free(buf);
                return NULL;
        }
        tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
                                     EAP_TLV_EAP_PAYLOAD_TLV);
        tlv->length = host_to_be16(*len);
        os_memcpy(tlv + 1, buf, *len);
        os_free(buf);
        *len += sizeof(*tlv);
        return (u8 *) tlv;
}


static u8 * eap_fast_process_crypto_binding(
        struct eap_sm *sm, struct eap_fast_data *data,
        struct eap_method_ret *ret,
        struct eap_tlv_crypto_binding__tlv *_bind, size_t bind_len,
        size_t *resp_len, int final)
{
        u8 *resp;
        struct eap_tlv_intermediate_result_tlv *rresult;
        struct eap_tlv_crypto_binding__tlv *rbind;
        u8 isk[32], imck[60], *cmk, cmac[20], *key;
        size_t key_len;
        int res;

        wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
                   "Received Version %d SubType %d",
                   _bind->version, _bind->received_version, _bind->subtype);
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
                    _bind->nonce, sizeof(_bind->nonce));
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
                    _bind->compound_mac, sizeof(_bind->compound_mac));

        if (_bind->version != EAP_FAST_VERSION ||
            _bind->received_version != EAP_FAST_VERSION ||
            _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
                wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
                           "Crypto-Binding TLV: Version %d "
                           "Received Version %d SubType %d",
                           _bind->version, _bind->received_version,
                           _bind->subtype);
                resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1,
                                           resp_len);
                return resp;
        }

        wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
                   "calculation", data->simck_idx + 1);

        /*
         * draft-cam-winget-eap-fast-05.txt, 5.2:
         * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
         *                 MSK[j], 60)
         * S-IMCK[j] = first 40 octets of IMCK[j]
         * CMK[j] = last 20 octets of IMCK[j]
         */

        os_memset(isk, 0, sizeof(isk));
        if (data->phase2_method == NULL || data->phase2_priv == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
                           "available");
                return NULL;
        }
        if (data->phase2_method->isKeyAvailable && data->phase2_method->getKey)
        {
                if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv)
                    ||
                    (key = data->phase2_method->getKey(sm, data->phase2_priv,
                                                       &key_len)) == NULL) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key "
                                   "material from Phase 2");
                        return NULL;
                }
                if (key_len > sizeof(isk))
                        key_len = sizeof(isk);
                os_memcpy(isk, key, key_len);
                os_free(key);
        }
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
        sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
                   "Inner Methods Compound Keys",
                   isk, sizeof(isk), imck, sizeof(imck));
        data->simck_idx++;
        os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
                        data->simck, EAP_FAST_SIMCK_LEN);
        cmk = imck + EAP_FAST_SIMCK_LEN;
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]", cmk, 20);

        os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
        os_memset(_bind->compound_mac, 0, sizeof(cmac));
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
                    "MAC calculation", (u8 *) _bind, bind_len);
        hmac_sha1(cmk, 20, (u8 *) _bind, bind_len, _bind->compound_mac);
        res = os_memcmp(cmac, _bind->compound_mac, sizeof(cmac));
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Received Compound MAC",
                    cmac, sizeof(cmac));
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Calculated Compound MAC",
                    _bind->compound_mac, sizeof(cmac));
        if (res != 0) {
                wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
                resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1,
                                           resp_len);
                os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
                return resp;
        }

        *resp_len = sizeof(*rresult) + sizeof(*rbind);
        resp = os_zalloc(*resp_len);
        if (resp == NULL)
                return NULL;

        /* Both intermediate and final Result TLVs are identical, so ok to use
         * the same structure definition for them. */
        rresult = (struct eap_tlv_intermediate_result_tlv *) resp;
        rresult->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
                                         (final ? EAP_TLV_RESULT_TLV :
                                          EAP_TLV_INTERMEDIATE_RESULT_TLV));
        rresult->length = host_to_be16(2);
        rresult->status = host_to_be16(EAP_TLV_RESULT_SUCCESS);

        if (!data->provisioning && data->phase2_success &&
            eap_fast_derive_msk(data) < 0) {
                wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
                ret->methodState = METHOD_DONE;
                ret->decision = DECISION_FAIL;
                rresult->status = host_to_be16(EAP_TLV_RESULT_FAILURE);
                data->phase2_success = 0;
        }

        rbind = (struct eap_tlv_crypto_binding__tlv *) (rresult + 1);
        rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
                                       EAP_TLV_CRYPTO_BINDING_TLV_);
        rbind->length = host_to_be16(sizeof(*rbind) -
                                     sizeof(struct eap_tlv_hdr));
        rbind->version = EAP_FAST_VERSION;
        rbind->received_version = _bind->version;
        rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
        os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
        inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
        hmac_sha1(cmk, 20, (u8 *) rbind, sizeof(*rbind), rbind->compound_mac);

        wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
                   "Received Version %d SubType %d",
                   rbind->version, rbind->received_version, rbind->subtype);
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
                    rbind->nonce, sizeof(rbind->nonce));
        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
                    rbind->compound_mac, sizeof(rbind->compound_mac));

        if (final && data->phase2_success) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication completed "
                           "successfully.");
                ret->methodState = METHOD_DONE;
                ret->decision = DECISION_UNCOND_SUCC;
        }

        return resp;
}


static u8 * eap_fast_process_pac(struct eap_sm *sm, struct eap_fast_data *data,
                                 struct eap_method_ret *ret,
                                 u8 *pac, size_t pac_len, size_t *resp_len)
{
        struct wpa_ssid *config = eap_get_config(sm);
        struct pac_tlv_hdr *hdr;
        u8 *pos;
        size_t left, len;
        int type, pac_key_found = 0;
        struct eap_fast_pac entry;

        os_memset(&entry, 0, sizeof(entry));
        pos = pac;
        left = pac_len;
        while (left > sizeof(*hdr)) {
                hdr = (struct pac_tlv_hdr *) pos;
                type = be_to_host16(hdr->type);
                len = be_to_host16(hdr->len);
                pos += sizeof(*hdr);
                left -= sizeof(*hdr);
                if (len > left) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
                                   "(type=%d len=%lu left=%lu)",
                                   type, (unsigned long) len,
                                   (unsigned long) left);
                        return eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                                   resp_len);
                }
                switch (type) {
                case PAC_TYPE_PAC_KEY:
                        wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key",
                                        pos, len);
                        if (len != EAP_FAST_PAC_KEY_LEN) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid "
                                           "PAC-Key length %lu",
                                           (unsigned long) len);
                                break;
                        }
                        pac_key_found = 1;
                        os_memcpy(entry.pac_key, pos, len);
                        break;
                case PAC_TYPE_PAC_OPAQUE:
                        wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque",
                                        pos, len);
                        entry.pac_opaque = pos;
                        entry.pac_opaque_len = len;
                        break;
                case PAC_TYPE_PAC_INFO:
                        wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info",
                                    pos, len);
                        entry.pac_info = pos;
                        entry.pac_info_len = len;
                        break;
                default:
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC "
                                   "type %d", type);
                        break;
                }

                pos += len;
                left -= len;
        }

        if (!pac_key_found || !entry.pac_opaque || !entry.pac_info) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
                           "all the required fields");
                return eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                           resp_len);
        }

        pos = entry.pac_info;
        left = entry.pac_info_len;
        while (left > sizeof(*hdr)) {
                hdr = (struct pac_tlv_hdr *) pos;
                type = be_to_host16(hdr->type);
                len = be_to_host16(hdr->len);
                pos += sizeof(*hdr);
                left -= sizeof(*hdr);
                if (len > left) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
                                   "(type=%d len=%lu left=%lu)",
                                   type, (unsigned long) len,
                                   (unsigned long) left);
                        return eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                                   resp_len);
                }
                switch (type) {
                case PAC_TYPE_A_ID:
                        wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - "
                                          "A-ID", pos, len);
                        entry.a_id = pos;
                        entry.a_id_len = len;
                        break;
                case PAC_TYPE_I_ID:
                        wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - "
                                          "I-ID", pos, len);
                        entry.i_id = pos;
                        entry.i_id_len = len;
                        break;
                case PAC_TYPE_A_ID_INFO:
                        wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - "
                                          "A-ID-Info", pos, len);
                        entry.a_id_info = pos;
                        entry.a_id_info_len = len;
                        break;
                default:
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown "
                                   "PAC-Info type %d", type);
                        break;
                }

                pos += len;
                left -= len;
        }

        if (entry.a_id == NULL || entry.a_id_info == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
                           "all the required fields");
                return eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                           resp_len);
        }

        eap_fast_add_pac(data, &entry);
        eap_fast_save_pac(sm, data, config->pac_file);

        if (data->provisioning) {
                /* EAP-FAST provisioning does not provide keying material and
                 * must end with an EAP-Failure. Authentication will be done
                 * separately after this. */
                data->success = 0;
                ret->decision = DECISION_FAIL;
                wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
                           "- Provisioning completed successfully");
        } else {
                /* This is PAC refreshing, i.e., normal authentication that is
                 * expected to be completed with an EAP-Success. */
                wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
                           "- PAC refreshing completed successfully");
                ret->decision = DECISION_UNCOND_SUCC;
        }
        ret->methodState = METHOD_DONE;
        return eap_fast_tlv_pac_ack(resp_len);
}


static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
                            struct eap_method_ret *ret,
                            const struct eap_hdr *req,
                            const u8 *in_data, size_t in_len,
                            u8 **out_data, size_t *out_len)
{
        u8 *in_decrypted, *pos, *end;
        int len_decrypted, len;
        struct eap_hdr *hdr;
        u8 *resp = NULL;
        size_t buf_len, resp_len;
        int mandatory, tlv_type;
        u8 *eap_payload_tlv = NULL, *pac = NULL;
        size_t eap_payload_tlv_len = 0, pac_len = 0;
        int iresult = 0, result = 0;
        struct eap_tlv_crypto_binding__tlv *crypto_binding = NULL;
        size_t crypto_binding_len = 0;
        const u8 *msg;
        size_t msg_len;
        int need_more_input, stop;

        wpa_printf(MSG_DEBUG, "EAP-FAST: received %lu bytes encrypted data for"
                   " Phase 2", (unsigned long) in_len);

        msg = eap_tls_data_reassemble(sm, &data->ssl, in_data, in_len,
                                      &msg_len, &need_more_input);
        if (msg == NULL)
                return need_more_input ? 1 : -1;

        buf_len = in_len;
        if (data->ssl.tls_in_total > buf_len)
                buf_len = data->ssl.tls_in_total;
        in_decrypted = os_malloc(buf_len);
        if (in_decrypted == NULL) {
                os_free(data->ssl.tls_in);
                data->ssl.tls_in = NULL;
                data->ssl.tls_in_len = 0;
                wpa_printf(MSG_WARNING, "EAP-FAST: failed to allocate memory "
                           "for decryption");
                return -1;
        }

        len_decrypted = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
                                               msg, msg_len,
                                               in_decrypted, buf_len);
        os_free(data->ssl.tls_in);
        data->ssl.tls_in = NULL;
        data->ssl.tls_in_len = 0;
        if (len_decrypted < 0) {
                wpa_printf(MSG_INFO, "EAP-FAST: Failed to decrypt Phase 2 "
                           "data");
                os_free(in_decrypted);
                return -1;
        }

        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
                    in_decrypted, len_decrypted);

        if (len_decrypted < 4) {
                os_free(in_decrypted);
                wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
                           "TLV frame (len=%d)", len_decrypted);
                return -1;
        }

        pos = in_decrypted;
        end = in_decrypted + len_decrypted;
        stop = 0;
        while (pos + 4 < end && !stop) {
                mandatory = pos[0] & 0x80;
                tlv_type = WPA_GET_BE16(pos) & 0x3fff;
                pos += 2;
                len = WPA_GET_BE16(pos);
                pos += 2;
                if (pos + len > end) {
                        os_free(in_decrypted);
                        wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
                        return 0;
                }
                wpa_printf(MSG_DEBUG, "EAP-FAST: received Phase 2: "
                           "TLV type %d length %d%s",
                           tlv_type, len, mandatory ? " (mandatory)" : "");

                switch (tlv_type) {
                case EAP_TLV_EAP_PAYLOAD_TLV:
                        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: EAP Payload TLV",
                                    pos, len);
                        eap_payload_tlv = pos;
                        eap_payload_tlv_len = len;
                        break;
                case EAP_TLV_RESULT_TLV:
                        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Result TLV",
                                    pos, len);
                        if (len < 2) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Too short "
                                           "Result TLV");
                                result = EAP_TLV_RESULT_FAILURE;
                                break;
                        }
                        result = WPA_GET_BE16(pos);
                        if (result != EAP_TLV_RESULT_SUCCESS &&
                            result != EAP_TLV_RESULT_FAILURE) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Unknown "
                                           "Result %d", result);
                                result = EAP_TLV_RESULT_FAILURE;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Result: %s",
                                   result == EAP_TLV_RESULT_SUCCESS ?
                                   "Success" : "Failure");
                        break;
                case EAP_TLV_INTERMEDIATE_RESULT_TLV:
                        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Intermediate "
                                    "Result TLV", pos, len);
                        if (len < 2) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Too short "
                                           "Intermediate Result TLV");
                                iresult = EAP_TLV_RESULT_FAILURE;
                                break;
                        }
                        iresult = WPA_GET_BE16(pos);
                        if (iresult != EAP_TLV_RESULT_SUCCESS &&
                            iresult != EAP_TLV_RESULT_FAILURE) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Unknown "
                                           "Intermediate Result %d", iresult);
                                iresult = EAP_TLV_RESULT_FAILURE;
                        }
                        wpa_printf(MSG_DEBUG,
                                   "EAP-FAST: Intermediate Result: %s",
                                   iresult == EAP_TLV_RESULT_SUCCESS ?
                                   "Success" : "Failure");
                        break;
                case EAP_TLV_CRYPTO_BINDING_TLV_:
                        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding "
                                    "TLV", pos, len);
                        crypto_binding_len = sizeof(struct eap_tlv_hdr) + len;
                        if (crypto_binding_len < sizeof(*crypto_binding)) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Too short "
                                           "Crypto-Binding TLV");
                                iresult = EAP_TLV_RESULT_FAILURE;
                                pos = end;
                                break;
                        }
                        crypto_binding =
                                (struct eap_tlv_crypto_binding__tlv *)
                                (pos - sizeof(struct eap_tlv_hdr));
                        break;
                case EAP_TLV_PAC_TLV:
                        wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: PAC TLV",
                                    pos, len);
                        pac = pos;
                        pac_len = len;
                        break;
                default:
                        if (mandatory) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
                                           "mandatory TLV type %d", tlv_type);
                                resp = eap_fast_tlv_nak(0, tlv_type,
                                                        &resp_len);
                                stop = 1;
                        } else {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
                                           "unknown optional TLV type %d",
                                           tlv_type);
                        }
                        break;
                }

                pos += len;
        }

        if (!resp && result == EAP_TLV_RESULT_FAILURE) {
                resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                           &resp_len);
                if (!resp) {
                        os_free(in_decrypted);
                        return 0;
                }
        }

        if (!resp && iresult == EAP_TLV_RESULT_FAILURE) {
                resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1,
                                           &resp_len);
                if (!resp) {
                        os_free(in_decrypted);
                        return 0;
                }
        }

        if (!resp && eap_payload_tlv) {
                if (eap_payload_tlv_len < sizeof(*hdr)) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
                                   "Payload TLV (len=%lu)",
                                   (unsigned long) eap_payload_tlv_len);
                        os_free(in_decrypted);
                        return 0;
                }
                hdr = (struct eap_hdr *) eap_payload_tlv;
                if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow "
                                   "in EAP Payload TLV");
                        os_free(in_decrypted);
                        return 0;
                }
                if (hdr->code == EAP_CODE_REQUEST) {
                        if (eap_fast_phase2_request(sm, data, ret, hdr,
                                                    &resp, &resp_len)) {
                                os_free(in_decrypted);
                                wpa_printf(MSG_INFO, "EAP-FAST: Phase2 "
                                           "Request processing failed");
                                return 0;
                        }
                        resp = eap_fast_tlv_eap_payload(resp, &resp_len);
                        if (resp == NULL) {
                                os_free(in_decrypted);
                                return 0;
                        }
                } else {
                        wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
                                   "Phase 2 EAP header", hdr->code);
                        os_free(in_decrypted);
                        return 0;
                }
        }

        if (!resp && crypto_binding) {
                int final = result == EAP_TLV_RESULT_SUCCESS;
                resp = eap_fast_process_crypto_binding(sm, data, ret,
                                                       crypto_binding,
                                                       crypto_binding_len,
                                                       &resp_len, final);
                if (!resp) {
                        os_free(in_decrypted);
                        return 0;
                }
        }

        if (!resp && pac && result != EAP_TLV_RESULT_SUCCESS) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
                           "acknowledging success");
                resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0,
                                           &resp_len);
                if (!resp) {
                        os_free(in_decrypted);
                        return 0;
                }
        }

        if (!resp && pac && result == EAP_TLV_RESULT_SUCCESS) {
                resp = eap_fast_process_pac(sm, data, ret, pac, pac_len,
                                            &resp_len);
                if (!resp) {
                        os_free(in_decrypted);
                        return 0;
                }
        }

        os_free(in_decrypted);

        if (resp == NULL) {
                wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
                           "empty response packet");
                resp = os_malloc(1);
                if (resp == NULL)
                        return 0;
                resp_len = 0;
        }

        wpa_hexdump(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
                    resp, resp_len);
        if (eap_fast_encrypt(sm, data, req->identifier, resp, resp_len,
                             out_data, out_len)) {
                wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
                           "frame");
        }
        os_free(resp);

        return 0;
}


static u8 * eap_fast_process(struct eap_sm *sm, void *priv,
                             struct eap_method_ret *ret,
                             const u8 *reqData, size_t reqDataLen,
                             size_t *respDataLen)
{
        const struct eap_hdr *req;
        size_t left;
        int res;
        u8 flags, *resp, id;
        const u8 *pos;
        struct eap_fast_data *data = priv;

        pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
                                   reqData, reqDataLen, &left, &flags);
        if (pos == NULL)
                return NULL;
        req = (const struct eap_hdr *) reqData;
        id = req->identifier;

        if (flags & EAP_TLS_FLAGS_START) {
                const u8 *a_id;
                size_t a_id_len;
                struct pac_tlv_hdr *hdr;

                wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own "
                           "ver=%d)", flags & EAP_PEAP_VERSION_MASK,
                        data->fast_version);
                if ((flags & EAP_PEAP_VERSION_MASK) < data->fast_version)
                        data->fast_version = flags & EAP_PEAP_VERSION_MASK;
                wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
                           data->fast_version);

                a_id = pos;
                a_id_len = left;
                if (left > sizeof(*hdr)) {
                        int tlen;
                        hdr = (struct pac_tlv_hdr *) pos;
                        tlen = be_to_host16(hdr->len);
                        if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
                            sizeof(*hdr) + tlen <= left) {
                                a_id = (u8 *) (hdr + 1);
                                a_id_len = tlen;
                        }
                }
                wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, a_id_len);

                data->current_pac = eap_fast_get_pac(data, a_id, a_id_len);
                if (data->current_pac) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this "
                                   "A-ID");
                        wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
                                          data->current_pac->a_id_info,
                                          data->current_pac->a_id_info_len);
                }

                if (data->resuming && data->current_pac) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume "
                                   "session - do not add PAC-Opaque to TLS "
                                   "ClientHello");
                        if (tls_connection_client_hello_ext(
                                    sm->ssl_ctx, data->ssl.conn,
                                    TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to "
                                           "remove PAC-Opaque TLS extension");
                                return NULL;
                        }

                } else if (data->current_pac) {
                        u8 *tlv;
                        size_t tlv_len, olen;
                        struct eap_tlv_hdr *ehdr;
                        olen = data->current_pac->pac_opaque_len;
                        tlv_len = sizeof(*ehdr) + olen;
                        tlv = os_malloc(tlv_len);
                        if (tlv) {
                                ehdr = (struct eap_tlv_hdr *) tlv;
                                ehdr->tlv_type =
                                        host_to_be16(PAC_TYPE_PAC_OPAQUE);
                                ehdr->length = host_to_be16(olen);
                                os_memcpy(ehdr + 1,
                                          data->current_pac->pac_opaque, olen);
                        }
                        if (tlv == NULL ||
                            tls_connection_client_hello_ext(
                                    sm->ssl_ctx, data->ssl.conn,
                                    TLS_EXT_PAC_OPAQUE, tlv, tlv_len) < 0) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to "
                                           "add PAC-Opaque TLS extension");
                                os_free(tlv);
                                return NULL;
                        }
                        os_free(tlv);
                } else {
                        u8 ciphers[2];
                        if (!data->provisioning_allowed) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found "
                                           "and provisioning disabled");
                                return NULL;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
                                   "starting provisioning");
                        ciphers[0] = TLS_CIPHER_ANON_DH_AES128_SHA;
                        ciphers[1] = TLS_CIPHER_NONE;
                        if (tls_connection_set_cipher_list(sm->ssl_ctx,
                                                           data->ssl.conn,
                                                           ciphers)) {
                                wpa_printf(MSG_INFO, "EAP-FAST: Could not "
                                           "configure anonymous DH for TLS "
                                           "connection");
                                return NULL;
                        }
                        if (tls_connection_client_hello_ext(
                                    sm->ssl_ctx, data->ssl.conn,
                                    TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
                                wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to "
                                           "remove PAC-Opaque TLS extension");
                                return NULL;
                        }
                        data->provisioning = 1;
                }

                left = 0; /* A-ID is not used in further packet processing */
        }

        resp = NULL;
        if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
            !data->resuming) {
                res = eap_fast_decrypt(sm, data, ret, req, pos, left,
                                       &resp, respDataLen);
                if (res < 0) {
                        ret->methodState = METHOD_DONE;
                        ret->decision = DECISION_FAIL;
                        /* Ack possible Alert that may have caused failure in
                         * decryption */
                        res = 1;
                }
        } else {
                if (eap_fast_set_tls_master_secret(sm, data, pos, left) < 0) {
                        wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to configure "
                                   "TLS master secret");
                        ret->methodState = METHOD_DONE;
                        ret->decision = DECISION_FAIL;
                        return NULL;
                }

                res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_FAST,
                                             data->fast_version, id, pos, left,
                                             &resp, respDataLen);

                if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
                        wpa_printf(MSG_DEBUG,
                                   "EAP-FAST: TLS done, proceed to Phase 2");
                        data->resuming = 0;
                        eap_fast_derive_keys(sm, data);
                }
        }

        if (res == 1)
                return eap_tls_build_ack(&data->ssl, respDataLen, id,
                                         EAP_TYPE_FAST, data->fast_version);
        return resp;
}


#if 0 /* FIX */
static Boolean eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
{
        struct eap_fast_data *data = priv;
        return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
}


static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
{
        struct eap_fast_data *data = priv;
        os_free(data->key_block_p);
        data->key_block_p = NULL;
}


static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
{
        struct eap_fast_data *data = priv;
        if (eap_tls_reauth_init(sm, &data->ssl)) {
                os_free(data);
                return NULL;
        }
        if (data->phase2_priv && data->phase2_method &&
            data->phase2_method->init_for_reauth)
                data->phase2_method->init_for_reauth(sm, data->phase2_priv);
        data->phase2_success = 0;
        data->resuming = 1;
        data->provisioning = 0;
        data->simck_idx = 0;
        return priv;
}
#endif


static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
                               size_t buflen, int verbose)
{
        struct eap_fast_data *data = priv;
        int len, ret;

        len = eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
        if (data->phase2_method) {
                ret = os_snprintf(buf + len, buflen - len,
                                  "EAP-FAST Phase2 method=%s\n",
                                  data->phase2_method->name);
                if (ret < 0 || (size_t) ret >= buflen - len)
                        return len;
                len += ret;
        }
        return len;
}


static Boolean eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
{
        struct eap_fast_data *data = priv;
        return data->success;
}


static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
{
        struct eap_fast_data *data = priv;
        u8 *key;

        if (!data->success)
                return NULL;

        key = os_malloc(EAP_FAST_KEY_LEN);
        if (key == NULL)
                return NULL;

        *len = EAP_FAST_KEY_LEN;
        os_memcpy(key, data->key_data, EAP_FAST_KEY_LEN);

        return key;
}


static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
{
        struct eap_fast_data *data = priv;
        u8 *key;

        if (!data->success)
                return NULL;

        key = os_malloc(EAP_EMSK_LEN);
        if (key == NULL)
                return NULL;

        *len = EAP_EMSK_LEN;
        os_memcpy(key, data->emsk, EAP_EMSK_LEN);

        return key;
}


int eap_peer_fast_register(void)
{
        struct eap_method *eap;
        int ret;

        eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
                                    EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
        if (eap == NULL)
                return -1;

        eap->init = eap_fast_init;
        eap->deinit = eap_fast_deinit;
        eap->process = eap_fast_process;
        eap->isKeyAvailable = eap_fast_isKeyAvailable;
        eap->getKey = eap_fast_getKey;
        eap->get_status = eap_fast_get_status;
#if 0
        eap->has_reauth_data = eap_fast_has_reauth_data;
        eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
        eap->init_for_reauth = eap_fast_init_for_reauth;
#endif
        eap->get_emsk = eap_fast_get_emsk;

        ret = eap_peer_method_register(eap);
        if (ret)
                eap_peer_method_free(eap);
        return ret;
}

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