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FIPS: Remove md5-non-fips.c

Browse source 
Commit c9e08af24f removed the only user of
the special case MD5 use that would be allowed in FIPS mode in
tls_prf_sha1_md5(). Commit 271dbf1594
removed the file from the build, but left the implementation into the
repository. To clean things up even further, remove this functionality
completely since it is not expected to be needed for FIPS mode anymore.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-08-19 16:53:15 +03:00
parent be9e8c293c
commit 44ec48ebfd
8 changed files with 9 additions and 170 deletions
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1
src/crypto/Makefile
View file

@ -31,7 +31,6 @@ LIB_OBJS= \
md4-internal.o \
md5.o \
md5-internal.o \
md5-non-fips.o \
milenage.o \
ms_funcs.o \
rc4.o \

15
src/crypto/crypto.h
View file

@ -41,21 +41,6 @@ int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac);
*/
int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac);
#ifdef CONFIG_FIPS
/**
* md5_vector_non_fips_allow - MD5 hash for data vector (non-FIPS use allowed)
* @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
* Returns: 0 on success, -1 on failure
*/
int md5_vector_non_fips_allow(size_t num_elem, const u8 *addr[],
const size_t *len, u8 *mac);
#else /* CONFIG_FIPS */
#define md5_vector_non_fips_allow md5_vector
#endif /* CONFIG_FIPS */
/**
* sha1_vector - SHA-1 hash for data vector

29
src/crypto/crypto_openssl.c
View file

@ -73,21 +73,14 @@ static BIGNUM * get_group5_prime(void)
#define NO_SHA256_WRAPPER
#endif
static int openssl_digest_vector(const EVP_MD *type, int non_fips,
size_t num_elem, const u8 *addr[],
const size_t *len, u8 *mac)
static int openssl_digest_vector(const EVP_MD *type, size_t num_elem,
const u8 *addr[], const size_t *len, u8 *mac)
{
EVP_MD_CTX ctx;
size_t i;
unsigned int mac_len;
EVP_MD_CTX_init(&ctx);
#ifdef CONFIG_FIPS
#ifdef OPENSSL_FIPS
if (non_fips)
EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
#endif /* OPENSSL_FIPS */
#endif /* CONFIG_FIPS */
if (!EVP_DigestInit_ex(&ctx, type, NULL)) {
wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestInit_ex failed: %s",
ERR_error_string(ERR_get_error(), NULL));
@ -113,7 +106,7 @@ static int openssl_digest_vector(const EVP_MD *type, int non_fips,
int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
{
return openssl_digest_vector(EVP_md4(), 0, num_elem, addr, len, mac);
return openssl_digest_vector(EVP_md4(), num_elem, addr, len, mac);
}
@ -177,22 +170,13 @@ out:
int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
{
return openssl_digest_vector(EVP_md5(), 0, num_elem, addr, len, mac);
return openssl_digest_vector(EVP_md5(), num_elem, addr, len, mac);
}
#ifdef CONFIG_FIPS
int md5_vector_non_fips_allow(size_t num_elem, const u8 *addr[],
const size_t *len, u8 *mac)
{
return openssl_digest_vector(EVP_md5(), 1, num_elem, addr, len, mac);
}
#endif /* CONFIG_FIPS */
int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
{
return openssl_digest_vector(EVP_sha1(), 0, num_elem, addr, len, mac);
return openssl_digest_vector(EVP_sha1(), num_elem, addr, len, mac);
}
@ -200,8 +184,7 @@ int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
u8 *mac)
{
return openssl_digest_vector(EVP_sha256(), 0, num_elem, addr, len,
mac);
return openssl_digest_vector(EVP_sha256(), num_elem, addr, len, mac);
}
#endif /* NO_SHA256_WRAPPER */

107
src/crypto/md5-non-fips.c
View file

@ -1,107 +0,0 @@
/*
* MD5 hash implementation and interface functions (non-FIPS allowed cases)
* Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "md5.h"
#include "crypto.h"
/**
* hmac_md5_vector_non_fips_allow - HMAC-MD5 over data vector (RFC 2104)
* @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 (16 bytes)
* Returns: 0 on success, -1 on failure
*/
int hmac_md5_vector_non_fips_allow(const u8 *key, size_t key_len,
size_t num_elem, const u8 *addr[],
const size_t *len, u8 *mac)
{
u8 k_pad[64]; /* padding - key XORd with ipad/opad */
u8 tk[16];
const u8 *_addr[6];
size_t i, _len[6];
if (num_elem > 5) {
/*
* Fixed limit on the number of fragments to avoid having to
* allocate memory (which could fail).
*/
return -1;
}
/* if key is longer than 64 bytes reset it to key = MD5(key) */
if (key_len > 64) {
if (md5_vector_non_fips_allow(1, &key, &key_len, tk))
return -1;
key = tk;
key_len = 16;
}
/* the HMAC_MD5 transform looks like:
*
* MD5(K XOR opad, MD5(K XOR ipad, text))
*
* where K is an n byte key
* ipad is the byte 0x36 repeated 64 times
* opad is the byte 0x5c repeated 64 times
* and text is the data being protected */
/* start out by storing key in ipad */
os_memset(k_pad, 0, sizeof(k_pad));
os_memcpy(k_pad, key, key_len);
/* XOR key with ipad values */
for (i = 0; i < 64; i++)
k_pad[i] ^= 0x36;
/* perform inner MD5 */
_addr[0] = k_pad;
_len[0] = 64;
for (i = 0; i < num_elem; i++) {
_addr[i + 1] = addr[i];
_len[i + 1] = len[i];
}
if (md5_vector_non_fips_allow(1 + num_elem, _addr, _len, mac))
return -1;
os_memset(k_pad, 0, sizeof(k_pad));
os_memcpy(k_pad, key, key_len);
/* XOR key with opad values */
for (i = 0; i < 64; i++)
k_pad[i] ^= 0x5c;
/* perform outer MD5 */
_addr[0] = k_pad;
_len[0] = 64;
_addr[1] = mac;
_len[1] = MD5_MAC_LEN;
return md5_vector_non_fips_allow(2, _addr, _len, mac);
}
/**
* hmac_md5_non_fips_allow - HMAC-MD5 over data buffer (RFC 2104)
* @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 (16 bytes)
* Returns: 0 on success, -1 on failure
*/
int hmac_md5_non_fips_allow(const u8 *key, size_t key_len, const u8 *data,
size_t data_len, u8 *mac)
{
return hmac_md5_vector_non_fips_allow(key, key_len, 1, &data,
&data_len, mac);
}

10
src/crypto/md5.h
View file

@ -15,15 +15,5 @@ int hmac_md5_vector(const u8 *key, size_t key_len, size_t num_elem,
const u8 *addr[], const size_t *len, u8 *mac);
int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
u8 *mac);
#ifdef CONFIG_FIPS
int hmac_md5_vector_non_fips_allow(const u8 *key, size_t key_len,
size_t num_elem, const u8 *addr[],
const size_t *len, u8 *mac);
int hmac_md5_non_fips_allow(const u8 *key, size_t key_len, const u8 *data,
size_t data_len, u8 *mac);
#else /* CONFIG_FIPS */
#define hmac_md5_vector_non_fips_allow hmac_md5_vector
#define hmac_md5_non_fips_allow hmac_md5
#endif /* CONFIG_FIPS */
#endif /* MD5_H */

9
src/crypto/sha1-tlsprf.c
View file

@ -71,19 +71,16 @@ int tls_prf_sha1_md5(const u8 *secret, size_t secret_len, const char *label,
S2--;
}
hmac_md5_vector_non_fips_allow(S1, L_S1, 2, &MD5_addr[1], &MD5_len[1],
A_MD5);
hmac_md5_vector(S1, L_S1, 2, &MD5_addr[1], &MD5_len[1], A_MD5);
hmac_sha1_vector(S2, L_S2, 2, &SHA1_addr[1], &SHA1_len[1], A_SHA1);
MD5_pos = MD5_MAC_LEN;
SHA1_pos = SHA1_MAC_LEN;
for (i = 0; i < outlen; i++) {
if (MD5_pos == MD5_MAC_LEN) {
hmac_md5_vector_non_fips_allow(S1, L_S1, 3, MD5_addr,
MD5_len, P_MD5);
hmac_md5_vector(S1, L_S1, 3, MD5_addr, MD5_len, P_MD5);
MD5_pos = 0;
hmac_md5_non_fips_allow(S1, L_S1, A_MD5, MD5_MAC_LEN,
A_MD5);
hmac_md5(S1, L_S1, A_MD5, MD5_MAC_LEN, A_MD5);
}
if (SHA1_pos == SHA1_MAC_LEN) {
hmac_sha1_vector(S2, L_S2, 3, SHA1_addr, SHA1_len,

3
wpa_supplicant/Android.mk
View file

@ -1093,9 +1093,6 @@ ifdef NEED_MD5
ifdef CONFIG_INTERNAL_MD5
MD5OBJS += src/crypto/md5-internal.c
endif
ifdef CONFIG_FIPS
MD5OBJS += src/crypto/md5-non-fips.c
endif
OBJS += $(MD5OBJS)
OBJS_p += $(MD5OBJS)
endif

5
wpa_supplicant/Makefile
View file

@ -1122,11 +1122,6 @@ ifdef NEED_MD5
ifdef CONFIG_INTERNAL_MD5
MD5OBJS += ../src/crypto/md5-internal.o
endif
ifdef CONFIG_FIPS
ifdef NEED_TLS_PRF
MD5OBJS += ../src/crypto/md5-non-fips.o
endif
endif
OBJS += $(MD5OBJS)
OBJS_p += $(MD5OBJS)
endif