diff options
Diffstat (limited to 'contrib/wpa/src/crypto/crypto_openssl.c')
| -rw-r--r-- | contrib/wpa/src/crypto/crypto_openssl.c | 409 |
1 files changed, 362 insertions, 47 deletions
diff --git a/contrib/wpa/src/crypto/crypto_openssl.c b/contrib/wpa/src/crypto/crypto_openssl.c index 08c98af..711e312 100644 --- a/contrib/wpa/src/crypto/crypto_openssl.c +++ b/contrib/wpa/src/crypto/crypto_openssl.c @@ -1,15 +1,9 @@ /* * WPA Supplicant / wrapper functions for libcrypto - * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi> + * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi> * - * 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. + * This software may be distributed under the terms of the BSD license. + * See README for more details. */ #include "includes.h" @@ -20,6 +14,11 @@ #include <openssl/bn.h> #include <openssl/evp.h> #include <openssl/dh.h> +#include <openssl/hmac.h> +#include <openssl/rand.h> +#ifdef CONFIG_OPENSSL_CMAC +#include <openssl/cmac.h> +#endif /* CONFIG_OPENSSL_CMAC */ #include "common.h" #include "wpabuf.h" @@ -74,21 +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)); @@ -114,7 +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); } @@ -178,22 +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); -} - - -#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); + return openssl_digest_vector(EVP_md5(), 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); } @@ -201,60 +184,124 @@ 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 */ +static const EVP_CIPHER * aes_get_evp_cipher(size_t keylen) +{ + switch (keylen) { + case 16: + return EVP_aes_128_ecb(); + case 24: + return EVP_aes_192_ecb(); + case 32: + return EVP_aes_256_ecb(); + } + + return NULL; +} + + void * aes_encrypt_init(const u8 *key, size_t len) { - AES_KEY *ak; - ak = os_malloc(sizeof(*ak)); - if (ak == NULL) + EVP_CIPHER_CTX *ctx; + const EVP_CIPHER *type; + + type = aes_get_evp_cipher(len); + if (type == NULL) return NULL; - if (AES_set_encrypt_key(key, 8 * len, ak) < 0) { - os_free(ak); + + ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + EVP_CIPHER_CTX_init(ctx); + if (EVP_EncryptInit_ex(ctx, type, NULL, key, NULL) != 1) { + os_free(ctx); return NULL; } - return ak; + EVP_CIPHER_CTX_set_padding(ctx, 0); + return ctx; } void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) { - AES_encrypt(plain, crypt, ctx); + EVP_CIPHER_CTX *c = ctx; + int clen = 16; + if (EVP_EncryptUpdate(c, crypt, &clen, plain, 16) != 1) { + wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptUpdate failed: %s", + ERR_error_string(ERR_get_error(), NULL)); + } } void aes_encrypt_deinit(void *ctx) { - os_free(ctx); + EVP_CIPHER_CTX *c = ctx; + u8 buf[16]; + int len = sizeof(buf); + if (EVP_EncryptFinal_ex(c, buf, &len) != 1) { + wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptFinal_ex failed: " + "%s", ERR_error_string(ERR_get_error(), NULL)); + } + if (len != 0) { + wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d " + "in AES encrypt", len); + } + EVP_CIPHER_CTX_cleanup(c); + os_free(c); } void * aes_decrypt_init(const u8 *key, size_t len) { - AES_KEY *ak; - ak = os_malloc(sizeof(*ak)); - if (ak == NULL) + EVP_CIPHER_CTX *ctx; + const EVP_CIPHER *type; + + type = aes_get_evp_cipher(len); + if (type == NULL) return NULL; - if (AES_set_decrypt_key(key, 8 * len, ak) < 0) { - os_free(ak); + + ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + EVP_CIPHER_CTX_init(ctx); + if (EVP_DecryptInit_ex(ctx, type, NULL, key, NULL) != 1) { + os_free(ctx); return NULL; } - return ak; + EVP_CIPHER_CTX_set_padding(ctx, 0); + return ctx; } void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) { - AES_decrypt(crypt, plain, ctx); + EVP_CIPHER_CTX *c = ctx; + int plen = 16; + if (EVP_DecryptUpdate(c, plain, &plen, crypt, 16) != 1) { + wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptUpdate failed: %s", + ERR_error_string(ERR_get_error(), NULL)); + } } void aes_decrypt_deinit(void *ctx) { + EVP_CIPHER_CTX *c = ctx; + u8 buf[16]; + int len = sizeof(buf); + if (EVP_DecryptFinal_ex(c, buf, &len) != 1) { + wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptFinal_ex failed: " + "%s", ERR_error_string(ERR_get_error(), NULL)); + } + if (len != 0) { + wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d " + "in AES decrypt", len); + } + EVP_CIPHER_CTX_cleanup(c); os_free(ctx); } @@ -458,6 +505,41 @@ err: } +void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ) +{ + DH *dh; + + dh = DH_new(); + if (dh == NULL) + return NULL; + + dh->g = BN_new(); + if (dh->g == NULL || BN_set_word(dh->g, 2) != 1) + goto err; + + dh->p = get_group5_prime(); + if (dh->p == NULL) + goto err; + + dh->priv_key = BN_bin2bn(wpabuf_head(priv), wpabuf_len(priv), NULL); + if (dh->priv_key == NULL) + goto err; + + dh->pub_key = BN_bin2bn(wpabuf_head(publ), wpabuf_len(publ), NULL); + if (dh->pub_key == NULL) + goto err; + + if (DH_generate_key(dh) != 1) + goto err; + + return dh; + +err: + DH_free(dh); + return NULL; +} + + struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public, const struct wpabuf *own_private) { @@ -503,3 +585,236 @@ void dh5_free(void *ctx) dh = ctx; DH_free(dh); } + + +struct crypto_hash { + HMAC_CTX ctx; +}; + + +struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key, + size_t key_len) +{ + struct crypto_hash *ctx; + const EVP_MD *md; + + switch (alg) { +#ifndef OPENSSL_NO_MD5 + case CRYPTO_HASH_ALG_HMAC_MD5: + md = EVP_md5(); + break; +#endif /* OPENSSL_NO_MD5 */ +#ifndef OPENSSL_NO_SHA + case CRYPTO_HASH_ALG_HMAC_SHA1: + md = EVP_sha1(); + break; +#endif /* OPENSSL_NO_SHA */ +#ifndef OPENSSL_NO_SHA256 +#ifdef CONFIG_SHA256 + case CRYPTO_HASH_ALG_HMAC_SHA256: + md = EVP_sha256(); + break; +#endif /* CONFIG_SHA256 */ +#endif /* OPENSSL_NO_SHA256 */ + default: + return NULL; + } + + ctx = os_zalloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + HMAC_CTX_init(&ctx->ctx); + +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL); +#else /* openssl < 0.9.9 */ + if (HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL) != 1) { + os_free(ctx); + return NULL; + } +#endif /* openssl < 0.9.9 */ + + return ctx; +} + + +void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len) +{ + if (ctx == NULL) + return; + HMAC_Update(&ctx->ctx, data, len); +} + + +int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len) +{ + unsigned int mdlen; + int res; + + if (ctx == NULL) + return -2; + + if (mac == NULL || len == NULL) { + os_free(ctx); + return 0; + } + + mdlen = *len; +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Final(&ctx->ctx, mac, &mdlen); + res = 1; +#else /* openssl < 0.9.9 */ + res = HMAC_Final(&ctx->ctx, mac, &mdlen); +#endif /* openssl < 0.9.9 */ + HMAC_CTX_cleanup(&ctx->ctx); + os_free(ctx); + + if (res == 1) { + *len = mdlen; + return 0; + } + + return -1; +} + + +int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len, + int iterations, u8 *buf, size_t buflen) +{ +#if OPENSSL_VERSION_NUMBER < 0x00908000 + if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase), + (unsigned char *) ssid, + ssid_len, 4096, buflen, buf) != 1) + return -1; +#else /* openssl < 0.9.8 */ + if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase), ssid, + ssid_len, 4096, buflen, buf) != 1) + return -1; +#endif /* openssl < 0.9.8 */ + return 0; +} + + +int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + HMAC_CTX ctx; + size_t i; + unsigned int mdlen; + int res; + + HMAC_CTX_init(&ctx); +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Init_ex(&ctx, key, key_len, EVP_sha1(), NULL); +#else /* openssl < 0.9.9 */ + if (HMAC_Init_ex(&ctx, key, key_len, EVP_sha1(), NULL) != 1) + return -1; +#endif /* openssl < 0.9.9 */ + + for (i = 0; i < num_elem; i++) + HMAC_Update(&ctx, addr[i], len[i]); + + mdlen = 20; +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Final(&ctx, mac, &mdlen); + res = 1; +#else /* openssl < 0.9.9 */ + res = HMAC_Final(&ctx, mac, &mdlen); +#endif /* openssl < 0.9.9 */ + HMAC_CTX_cleanup(&ctx); + + return res == 1 ? 0 : -1; +} + + +int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_sha1_vector(key, key_len, 1, &data, &data_len, mac); +} + + +#ifdef CONFIG_SHA256 + +int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + HMAC_CTX ctx; + size_t i; + unsigned int mdlen; + int res; + + HMAC_CTX_init(&ctx); +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL); +#else /* openssl < 0.9.9 */ + if (HMAC_Init_ex(&ctx, key, key_len, EVP_sha256(), NULL) != 1) + return -1; +#endif /* openssl < 0.9.9 */ + + for (i = 0; i < num_elem; i++) + HMAC_Update(&ctx, addr[i], len[i]); + + mdlen = 32; +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Final(&ctx, mac, &mdlen); + res = 1; +#else /* openssl < 0.9.9 */ + res = HMAC_Final(&ctx, mac, &mdlen); +#endif /* openssl < 0.9.9 */ + HMAC_CTX_cleanup(&ctx); + + return res == 1 ? 0 : -1; +} + + +int hmac_sha256(const u8 *key, size_t key_len, const u8 *data, + size_t data_len, u8 *mac) +{ + return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac); +} + +#endif /* CONFIG_SHA256 */ + + +int crypto_get_random(void *buf, size_t len) +{ + if (RAND_bytes(buf, len) != 1) + return -1; + return 0; +} + + +#ifdef CONFIG_OPENSSL_CMAC +int omac1_aes_128_vector(const u8 *key, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + CMAC_CTX *ctx; + int ret = -1; + size_t outlen, i; + + ctx = CMAC_CTX_new(); + if (ctx == NULL) + return -1; + + if (!CMAC_Init(ctx, key, 16, EVP_aes_128_cbc(), NULL)) + goto fail; + for (i = 0; i < num_elem; i++) { + if (!CMAC_Update(ctx, addr[i], len[i])) + goto fail; + } + if (!CMAC_Final(ctx, mac, &outlen) || outlen != 16) + goto fail; + + ret = 0; +fail: + CMAC_CTX_free(ctx); + return ret; +} + + +int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) +{ + return omac1_aes_128_vector(key, 1, &data, &data_len, mac); +} +#endif /* CONFIG_OPENSSL_CMAC */ |
