sha1.c File Reference

SHA1 hash implementation and interface functions. More...

#include "includes.h"
#include "common.h"
#include "sha1.h"
#include "md5.h"
#include "crypto.h"

Include dependency graph for sha1.c:

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Functions
void	hmac_sha1_vector (const u8 *key, size_t key_len, size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
	HMAC-SHA1 over data vector (RFC 2104).
void	hmac_sha1 (const u8 *key, size_t key_len, const u8 *data, size_t data_len, u8 *mac)
	HMAC-SHA1 over data buffer (RFC 2104).
void	sha1_prf (const u8 *key, size_t key_len, const char *label, const u8 *data, size_t data_len, u8 *buf, size_t buf_len)
	SHA1-based Pseudo-Random Function (PRF) (IEEE 802.11i, 8.5.1.1).
void	sha1_t_prf (const u8 *key, size_t key_len, const char *label, const u8 *seed, size_t seed_len, u8 *buf, size_t buf_len)
	EAP-FAST Pseudo-Random Function (T-PRF).
int	tls_prf (const u8 *secret, size_t secret_len, const char *label, const u8 *seed, size_t seed_len, u8 *out, size_t outlen)
	Pseudo-Random Function for TLS (TLS-PRF, RFC 2246).
void	pbkdf2_sha1 (const char *passphrase, const char *ssid, size_t ssid_len, int iterations, u8 *buf, size_t buflen)
	SHA1-based key derivation function (PBKDF2) for IEEE 802.11i.

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Detailed Description

SHA1 hash implementation and interface functions.

Copyright

Copyright (c) 2003-2005, Jouni Malinen <[email protected]>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

Alternatively, this software may be distributed under the terms of BSD license.

See README and COPYING for more details.

Definition in file sha1.c.

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Function Documentation

void hmac_sha1 (  const u8 *  key, size_t  key_len, const u8 *  data, size_t  data_len, u8 *  mac )

HMAC-SHA1 over data buffer (RFC 2104). Parameters: key  Key for HMAC operations key_len  Length of the key in bytes data  Pointers to the data area data_len  Length of the data area mac  Buffer for the hash (20 bytes) Definition at line 106 of file sha1.c. Here is the call graph for this function:

void hmac_sha1_vector (  const u8 *  key, size_t  key_len, size_t  num_elem, const u8 *  addr[], const size_t *  len, u8 *  mac )

HMAC-SHA1 over data vector (RFC 2104). Parameters: key  Key for HMAC operations key_len  Length of the key in bytes num_elem  Number of elements in the data vector addr  Pointers to the data areas len  Lengths of the data blocks mac  Buffer for the hash (20 bytes) Definition at line 34 of file sha1.c. Here is the call graph for this function:

void pbkdf2_sha1 (  const char *  passphrase, const char *  ssid, size_t  ssid_len, int  iterations, u8 *  buf, size_t  buflen )

SHA1-based key derivation function (PBKDF2) for IEEE 802.11i. Parameters: passphrase  ASCII passphrase ssid  SSID ssid_len  SSID length in bytes interations  Number of iterations to run buf  Buffer for the generated key buflen  Length of the buffer in bytes This function is used to derive PSK for WPA-PSK. For this protocol, iterations is set to 4096 and buflen to 32. This function is described in IEEE Std 802.11-2004, Clause H.4. The main construction is from PKCS#5 v2.0. Definition at line 356 of file sha1.c.

void sha1_prf (  const u8 *  key, size_t  key_len, const char *  label, const u8 *  data, size_t  data_len, u8 *  buf, size_t  buf_len )

SHA1-based Pseudo-Random Function (PRF) (IEEE 802.11i, 8.5.1.1). Parameters: key  Key for PRF key_len  Length of the key in bytes label  A unique label for each purpose of the PRF data  Extra data to bind into the key data_len  Length of the data buf  Buffer for the generated pseudo-random key buf_len  Number of bytes of key to generate This function is used to derive new, cryptographically separate keys from a given key (e.g., PMK in IEEE 802.11i). Definition at line 127 of file sha1.c. Here is the call graph for this function:

void sha1_t_prf (  const u8 *  key, size_t  key_len, const char *  label, const u8 *  seed, size_t  seed_len, u8 *  buf, size_t  buf_len )

EAP-FAST Pseudo-Random Function (T-PRF). Parameters: key  Key for PRF key_len  Length of the key in bytes label  A unique label for each purpose of the PRF seed  Seed value to bind into the key seed_len  Length of the seed buf  Buffer for the generated pseudo-random key buf_len  Number of bytes of key to generate This function is used to derive new, cryptographically separate keys from a given key for EAP-FAST. T-PRF is defined in draft-cam-winget-eap-fast-02.txt, Appendix B. Definition at line 179 of file sha1.c. Here is the call graph for this function:

int tls_prf (  const u8 *  secret, size_t  secret_len, const char *  label, const u8 *  seed, size_t  seed_len, u8 *  out, size_t  outlen )

Pseudo-Random Function for TLS (TLS-PRF, RFC 2246). Parameters: secret  Key for PRF secret_len  Length of the key in bytes label  A unique label for each purpose of the PRF seed  Seed value to bind into the key seed_len  Length of the seed out  Buffer for the generated pseudo-random key outlen  Number of bytes of key to generate Returns: 0 on success, -1 on failure. This function is used to derive new, cryptographically separate keys from a given key in TLS. This PRF is defined in RFC 2246, Chapter 5. Definition at line 235 of file sha1.c. Here is the call graph for this function:

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