X-Git-Url: http://www.project-moonshot.org/gitweb/?p=mech_eap.git;a=blobdiff_plain;f=libeap%2Fsrc%2Fcrypto%2Fcrypto_openssl.c;h=6cff75c64ae5a918a193d1ec777e9968d3ddcac1;hp=08c98aff4ba1f8872010f603c175049490aecfee;hb=4f319dde67a76fe0aaf33f6d2788968012584ada;hpb=ed09b5e64dd485851310307979d5eed14678087b diff --git a/libeap/src/crypto/crypto_openssl.c b/libeap/src/crypto/crypto_openssl.c index 08c98af..6cff75c 100644 --- a/libeap/src/crypto/crypto_openssl.c +++ b/libeap/src/crypto/crypto_openssl.c @@ -1,15 +1,9 @@ /* - * WPA Supplicant / wrapper functions for libcrypto - * Copyright (c) 2004-2009, Jouni Malinen + * Wrapper functions for OpenSSL libcrypto + * Copyright (c) 2004-2015, Jouni Malinen * - * 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" @@ -20,23 +14,26 @@ #include #include #include +#include +#include +#ifdef CONFIG_OPENSSL_CMAC +#include +#endif /* CONFIG_OPENSSL_CMAC */ +#ifdef CONFIG_ECC +#include +#endif /* CONFIG_ECC */ #include "common.h" #include "wpabuf.h" #include "dh_group5.h" +#include "sha1.h" +#include "sha256.h" +#include "sha384.h" #include "crypto.h" -#if OPENSSL_VERSION_NUMBER < 0x00907000 -#define DES_key_schedule des_key_schedule -#define DES_cblock des_cblock -#define DES_set_key(key, schedule) des_set_key((key), *(schedule)) -#define DES_ecb_encrypt(input, output, ks, enc) \ - des_ecb_encrypt((input), (output), *(ks), (enc)) -#endif /* openssl < 0.9.7 */ - static BIGNUM * get_group5_prime(void) { -#if OPENSSL_VERSION_NUMBER < 0x00908000 +#ifdef OPENSSL_IS_BORINGSSL static const unsigned char RFC3526_PRIME_1536[] = { 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC9,0x0F,0xDA,0xA2, 0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,0x80,0xDC,0x1C,0xD1, @@ -56,39 +53,23 @@ static BIGNUM * get_group5_prime(void) 0xCA,0x23,0x73,0x27,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, }; return BN_bin2bn(RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), NULL); -#else /* openssl < 0.9.8 */ +#else /* OPENSSL_IS_BORINGSSL */ return get_rfc3526_prime_1536(NULL); -#endif /* openssl < 0.9.8 */ +#endif /* OPENSSL_IS_BORINGSSL */ } -#if OPENSSL_VERSION_NUMBER < 0x00908000 -#ifndef OPENSSL_NO_SHA256 -#ifndef OPENSSL_FIPS -#define NO_SHA256_WRAPPER -#endif -#endif - -#endif /* openssl < 0.9.8 */ - #ifdef OPENSSL_NO_SHA256 #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)); @@ -112,10 +93,12 @@ static int openssl_digest_vector(const EVP_MD *type, int non_fips, } +#ifndef CONFIG_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); } +#endif /* CONFIG_FIPS */ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) @@ -133,12 +116,13 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) } pkey[i] = next | 1; - DES_set_key(&pkey, &ks); + DES_set_key((DES_cblock *) &pkey, &ks); DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks, DES_ENCRYPT); } +#ifndef CONFIG_NO_RC4 int rc4_skip(const u8 *key, size_t keylen, size_t skip, u8 *data, size_t data_len) { @@ -174,26 +158,20 @@ out: return res; #endif /* OPENSSL_NO_RC4 */ } +#endif /* CONFIG_NO_RC4 */ +#ifndef CONFIG_FIPS 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); } @@ -201,61 +179,210 @@ 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(); +#ifndef OPENSSL_IS_BORINGSSL + case 24: + return EVP_aes_192_ecb(); +#endif /* OPENSSL_IS_BORINGSSL */ + 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); + bin_clear_free(c, sizeof(*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; + + ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) return NULL; - if (AES_set_decrypt_key(key, 8 * len, ak) < 0) { - os_free(ak); + 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) { - os_free(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); + bin_clear_free(c, sizeof(*c)); +} + + +#ifndef CONFIG_FIPS +#ifndef CONFIG_OPENSSL_INTERNAL_AES_WRAP + +int aes_wrap(const u8 *kek, size_t kek_len, int n, const u8 *plain, u8 *cipher) +{ + AES_KEY actx; + int res; + + if (AES_set_encrypt_key(kek, kek_len << 3, &actx)) + return -1; + res = AES_wrap_key(&actx, NULL, cipher, plain, n * 8); + OPENSSL_cleanse(&actx, sizeof(actx)); + return res <= 0 ? -1 : 0; +} + + +int aes_unwrap(const u8 *kek, size_t kek_len, int n, const u8 *cipher, + u8 *plain) +{ + AES_KEY actx; + int res; + + if (AES_set_decrypt_key(kek, kek_len << 3, &actx)) + return -1; + res = AES_unwrap_key(&actx, NULL, plain, cipher, (n + 1) * 8); + OPENSSL_cleanse(&actx, sizeof(actx)); + return res <= 0 ? -1 : 0; +} + +#endif /* CONFIG_OPENSSL_INTERNAL_AES_WRAP */ +#endif /* CONFIG_FIPS */ + + +int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) +{ + EVP_CIPHER_CTX ctx; + int clen, len; + u8 buf[16]; + + EVP_CIPHER_CTX_init(&ctx); + if (EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, key, iv) != 1) + return -1; + EVP_CIPHER_CTX_set_padding(&ctx, 0); + + clen = data_len; + if (EVP_EncryptUpdate(&ctx, data, &clen, data, data_len) != 1 || + clen != (int) data_len) + return -1; + + len = sizeof(buf); + if (EVP_EncryptFinal_ex(&ctx, buf, &len) != 1 || len != 0) + return -1; + EVP_CIPHER_CTX_cleanup(&ctx); + + return 0; +} + + +int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) +{ + EVP_CIPHER_CTX ctx; + int plen, len; + u8 buf[16]; + + EVP_CIPHER_CTX_init(&ctx); + if (EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, key, iv) != 1) + return -1; + EVP_CIPHER_CTX_set_padding(&ctx, 0); + + plen = data_len; + if (EVP_DecryptUpdate(&ctx, data, &plen, data, data_len) != 1 || + plen != (int) data_len) + return -1; + + len = sizeof(buf); + if (EVP_DecryptFinal_ex(&ctx, buf, &len) != 1 || len != 0) + return -1; + EVP_CIPHER_CTX_cleanup(&ctx); + + return 0; } @@ -288,10 +415,10 @@ int crypto_mod_exp(const u8 *base, size_t base_len, ret = 0; error: - BN_free(bn_base); - BN_free(bn_exp); - BN_free(bn_modulus); - BN_free(bn_result); + BN_clear_free(bn_base); + BN_clear_free(bn_exp); + BN_clear_free(bn_modulus); + BN_clear_free(bn_result); BN_CTX_free(ctx); return ret; } @@ -315,20 +442,24 @@ struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg, return NULL; switch (alg) { +#ifndef CONFIG_NO_RC4 #ifndef OPENSSL_NO_RC4 case CRYPTO_CIPHER_ALG_RC4: cipher = EVP_rc4(); break; #endif /* OPENSSL_NO_RC4 */ +#endif /* CONFIG_NO_RC4 */ #ifndef OPENSSL_NO_AES case CRYPTO_CIPHER_ALG_AES: switch (key_len) { case 16: cipher = EVP_aes_128_cbc(); break; +#ifndef OPENSSL_IS_BORINGSSL case 24: cipher = EVP_aes_192_cbc(); break; +#endif /* OPENSSL_IS_BORINGSSL */ case 32: cipher = EVP_aes_256_cbc(); break; @@ -451,8 +582,43 @@ void * dh5_init(struct wpabuf **priv, struct wpabuf **publ) return dh; err: - wpabuf_free(pubkey); - wpabuf_free(privkey); + wpabuf_clear_free(pubkey); + wpabuf_clear_free(privkey); + DH_free(dh); + return NULL; +} + + +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; } @@ -484,13 +650,13 @@ struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public, if (keylen < 0) goto err; wpabuf_put(res, keylen); - BN_free(pub_key); + BN_clear_free(pub_key); return res; err: - BN_free(pub_key); - wpabuf_free(res); + BN_clear_free(pub_key); + wpabuf_clear_free(res); return NULL; } @@ -503,3 +669,774 @@ 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) { + bin_clear_free(ctx, sizeof(*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) { + bin_clear_free(ctx, sizeof(*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); + bin_clear_free(ctx, sizeof(*ctx)); + + if (res == 1) { + *len = mdlen; + return 0; + } + + return -1; +} + + +static int openssl_hmac_vector(const EVP_MD *type, const u8 *key, + size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac, + unsigned int mdlen) +{ + HMAC_CTX ctx; + size_t i; + int res; + + HMAC_CTX_init(&ctx); +#if OPENSSL_VERSION_NUMBER < 0x00909000 + HMAC_Init_ex(&ctx, key, key_len, type, NULL); +#else /* openssl < 0.9.9 */ + if (HMAC_Init_ex(&ctx, key, key_len, type, NULL) != 1) + return -1; +#endif /* openssl < 0.9.9 */ + + for (i = 0; i < num_elem; i++) + HMAC_Update(&ctx, addr[i], len[i]); + +#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; +} + + +#ifndef CONFIG_FIPS + +int hmac_md5_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return openssl_hmac_vector(EVP_md5(), key ,key_len, num_elem, addr, len, + mac, 16); +} + + +int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_md5_vector(key, key_len, 1, &data, &data_len, mac); +} + +#endif /* CONFIG_FIPS */ + + +int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len, + int iterations, u8 *buf, size_t buflen) +{ + if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase), ssid, + ssid_len, iterations, buflen, buf) != 1) + return -1; + 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) +{ + return openssl_hmac_vector(EVP_sha1(), key, key_len, num_elem, addr, + len, mac, 20); +} + + +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) +{ + return openssl_hmac_vector(EVP_sha256(), key, key_len, num_elem, addr, + len, mac, 32); +} + + +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 */ + + +#ifdef CONFIG_SHA384 + +int hmac_sha384_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return openssl_hmac_vector(EVP_sha384(), key, key_len, num_elem, addr, + len, mac, 32); +} + + +int hmac_sha384(const u8 *key, size_t key_len, const u8 *data, + size_t data_len, u8 *mac) +{ + return hmac_sha384_vector(key, key_len, 1, &data, &data_len, mac); +} + +#endif /* CONFIG_SHA384 */ + + +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_vector(const u8 *key, size_t key_len, 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 (key_len == 32) { + if (!CMAC_Init(ctx, key, 32, EVP_aes_256_cbc(), NULL)) + goto fail; + } else if (key_len == 16) { + if (!CMAC_Init(ctx, key, 16, EVP_aes_128_cbc(), NULL)) + goto fail; + } else { + 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_vector(const u8 *key, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return omac1_aes_vector(key, 16, num_elem, addr, len, mac); +} + + +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); +} + + +int omac1_aes_256(const u8 *key, const u8 *data, size_t data_len, u8 *mac) +{ + return omac1_aes_vector(key, 32, 1, &data, &data_len, mac); +} +#endif /* CONFIG_OPENSSL_CMAC */ + + +struct crypto_bignum * crypto_bignum_init(void) +{ + return (struct crypto_bignum *) BN_new(); +} + + +struct crypto_bignum * crypto_bignum_init_set(const u8 *buf, size_t len) +{ + BIGNUM *bn = BN_bin2bn(buf, len, NULL); + return (struct crypto_bignum *) bn; +} + + +void crypto_bignum_deinit(struct crypto_bignum *n, int clear) +{ + if (clear) + BN_clear_free((BIGNUM *) n); + else + BN_free((BIGNUM *) n); +} + + +int crypto_bignum_to_bin(const struct crypto_bignum *a, + u8 *buf, size_t buflen, size_t padlen) +{ + int num_bytes, offset; + + if (padlen > buflen) + return -1; + + num_bytes = BN_num_bytes((const BIGNUM *) a); + if ((size_t) num_bytes > buflen) + return -1; + if (padlen > (size_t) num_bytes) + offset = padlen - num_bytes; + else + offset = 0; + + os_memset(buf, 0, offset); + BN_bn2bin((const BIGNUM *) a, buf + offset); + + return num_bytes + offset; +} + + +int crypto_bignum_add(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return BN_add((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b) ? + 0 : -1; +} + + +int crypto_bignum_mod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + int res; + BN_CTX *bnctx; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -1; + res = BN_mod((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b, + bnctx); + BN_CTX_free(bnctx); + + return res ? 0 : -1; +} + + +int crypto_bignum_exptmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + const struct crypto_bignum *c, + struct crypto_bignum *d) +{ + int res; + BN_CTX *bnctx; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -1; + res = BN_mod_exp((BIGNUM *) d, (const BIGNUM *) a, (const BIGNUM *) b, + (const BIGNUM *) c, bnctx); + BN_CTX_free(bnctx); + + return res ? 0 : -1; +} + + +int crypto_bignum_inverse(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + BIGNUM *res; + BN_CTX *bnctx; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -1; + res = BN_mod_inverse((BIGNUM *) c, (const BIGNUM *) a, + (const BIGNUM *) b, bnctx); + BN_CTX_free(bnctx); + + return res ? 0 : -1; +} + + +int crypto_bignum_sub(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return BN_sub((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b) ? + 0 : -1; +} + + +int crypto_bignum_div(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + int res; + + BN_CTX *bnctx; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -1; + res = BN_div((BIGNUM *) c, NULL, (const BIGNUM *) a, + (const BIGNUM *) b, bnctx); + BN_CTX_free(bnctx); + + return res ? 0 : -1; +} + + +int crypto_bignum_mulmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + const struct crypto_bignum *c, + struct crypto_bignum *d) +{ + int res; + + BN_CTX *bnctx; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -1; + res = BN_mod_mul((BIGNUM *) d, (const BIGNUM *) a, (const BIGNUM *) b, + (const BIGNUM *) c, bnctx); + BN_CTX_free(bnctx); + + return res ? 0 : -1; +} + + +int crypto_bignum_cmp(const struct crypto_bignum *a, + const struct crypto_bignum *b) +{ + return BN_cmp((const BIGNUM *) a, (const BIGNUM *) b); +} + + +int crypto_bignum_bits(const struct crypto_bignum *a) +{ + return BN_num_bits((const BIGNUM *) a); +} + + +int crypto_bignum_is_zero(const struct crypto_bignum *a) +{ + return BN_is_zero((const BIGNUM *) a); +} + + +int crypto_bignum_is_one(const struct crypto_bignum *a) +{ + return BN_is_one((const BIGNUM *) a); +} + + +int crypto_bignum_legendre(const struct crypto_bignum *a, + const struct crypto_bignum *p) +{ + BN_CTX *bnctx; + BIGNUM *exp = NULL, *tmp = NULL; + int res = -2; + + bnctx = BN_CTX_new(); + if (bnctx == NULL) + return -2; + + exp = BN_new(); + tmp = BN_new(); + if (!exp || !tmp || + /* exp = (p-1) / 2 */ + !BN_sub(exp, (const BIGNUM *) p, BN_value_one()) || + !BN_rshift1(exp, exp) || + !BN_mod_exp(tmp, (const BIGNUM *) a, exp, (const BIGNUM *) p, + bnctx)) + goto fail; + + if (BN_is_word(tmp, 1)) + res = 1; + else if (BN_is_zero(tmp)) + res = 0; + else + res = -1; + +fail: + BN_clear_free(tmp); + BN_clear_free(exp); + BN_CTX_free(bnctx); + return res; +} + + +#ifdef CONFIG_ECC + +struct crypto_ec { + EC_GROUP *group; + BN_CTX *bnctx; + BIGNUM *prime; + BIGNUM *order; + BIGNUM *a; + BIGNUM *b; +}; + +struct crypto_ec * crypto_ec_init(int group) +{ + struct crypto_ec *e; + int nid; + + /* Map from IANA registry for IKE D-H groups to OpenSSL NID */ + switch (group) { + case 19: + nid = NID_X9_62_prime256v1; + break; + case 20: + nid = NID_secp384r1; + break; + case 21: + nid = NID_secp521r1; + break; + case 25: + nid = NID_X9_62_prime192v1; + break; + case 26: + nid = NID_secp224r1; + break; +#ifdef NID_brainpoolP224r1 + case 27: + nid = NID_brainpoolP224r1; + break; +#endif /* NID_brainpoolP224r1 */ +#ifdef NID_brainpoolP256r1 + case 28: + nid = NID_brainpoolP256r1; + break; +#endif /* NID_brainpoolP256r1 */ +#ifdef NID_brainpoolP384r1 + case 29: + nid = NID_brainpoolP384r1; + break; +#endif /* NID_brainpoolP384r1 */ +#ifdef NID_brainpoolP512r1 + case 30: + nid = NID_brainpoolP512r1; + break; +#endif /* NID_brainpoolP512r1 */ + default: + return NULL; + } + + e = os_zalloc(sizeof(*e)); + if (e == NULL) + return NULL; + + e->bnctx = BN_CTX_new(); + e->group = EC_GROUP_new_by_curve_name(nid); + e->prime = BN_new(); + e->order = BN_new(); + e->a = BN_new(); + e->b = BN_new(); + if (e->group == NULL || e->bnctx == NULL || e->prime == NULL || + e->order == NULL || e->a == NULL || e->b == NULL || + !EC_GROUP_get_curve_GFp(e->group, e->prime, e->a, e->b, e->bnctx) || + !EC_GROUP_get_order(e->group, e->order, e->bnctx)) { + crypto_ec_deinit(e); + e = NULL; + } + + return e; +} + + +void crypto_ec_deinit(struct crypto_ec *e) +{ + if (e == NULL) + return; + BN_clear_free(e->b); + BN_clear_free(e->a); + BN_clear_free(e->order); + BN_clear_free(e->prime); + EC_GROUP_free(e->group); + BN_CTX_free(e->bnctx); + os_free(e); +} + + +struct crypto_ec_point * crypto_ec_point_init(struct crypto_ec *e) +{ + if (e == NULL) + return NULL; + return (struct crypto_ec_point *) EC_POINT_new(e->group); +} + + +size_t crypto_ec_prime_len(struct crypto_ec *e) +{ + return BN_num_bytes(e->prime); +} + + +size_t crypto_ec_prime_len_bits(struct crypto_ec *e) +{ + return BN_num_bits(e->prime); +} + + +const struct crypto_bignum * crypto_ec_get_prime(struct crypto_ec *e) +{ + return (const struct crypto_bignum *) e->prime; +} + + +const struct crypto_bignum * crypto_ec_get_order(struct crypto_ec *e) +{ + return (const struct crypto_bignum *) e->order; +} + + +void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear) +{ + if (clear) + EC_POINT_clear_free((EC_POINT *) p); + else + EC_POINT_free((EC_POINT *) p); +} + + +int crypto_ec_point_to_bin(struct crypto_ec *e, + const struct crypto_ec_point *point, u8 *x, u8 *y) +{ + BIGNUM *x_bn, *y_bn; + int ret = -1; + int len = BN_num_bytes(e->prime); + + x_bn = BN_new(); + y_bn = BN_new(); + + if (x_bn && y_bn && + EC_POINT_get_affine_coordinates_GFp(e->group, (EC_POINT *) point, + x_bn, y_bn, e->bnctx)) { + if (x) { + crypto_bignum_to_bin((struct crypto_bignum *) x_bn, + x, len, len); + } + if (y) { + crypto_bignum_to_bin((struct crypto_bignum *) y_bn, + y, len, len); + } + ret = 0; + } + + BN_clear_free(x_bn); + BN_clear_free(y_bn); + return ret; +} + + +struct crypto_ec_point * crypto_ec_point_from_bin(struct crypto_ec *e, + const u8 *val) +{ + BIGNUM *x, *y; + EC_POINT *elem; + int len = BN_num_bytes(e->prime); + + x = BN_bin2bn(val, len, NULL); + y = BN_bin2bn(val + len, len, NULL); + elem = EC_POINT_new(e->group); + if (x == NULL || y == NULL || elem == NULL) { + BN_clear_free(x); + BN_clear_free(y); + EC_POINT_clear_free(elem); + return NULL; + } + + if (!EC_POINT_set_affine_coordinates_GFp(e->group, elem, x, y, + e->bnctx)) { + EC_POINT_clear_free(elem); + elem = NULL; + } + + BN_clear_free(x); + BN_clear_free(y); + + return (struct crypto_ec_point *) elem; +} + + +int crypto_ec_point_add(struct crypto_ec *e, const struct crypto_ec_point *a, + const struct crypto_ec_point *b, + struct crypto_ec_point *c) +{ + return EC_POINT_add(e->group, (EC_POINT *) c, (const EC_POINT *) a, + (const EC_POINT *) b, e->bnctx) ? 0 : -1; +} + + +int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p, + const struct crypto_bignum *b, + struct crypto_ec_point *res) +{ + return EC_POINT_mul(e->group, (EC_POINT *) res, NULL, + (const EC_POINT *) p, (const BIGNUM *) b, e->bnctx) + ? 0 : -1; +} + + +int crypto_ec_point_invert(struct crypto_ec *e, struct crypto_ec_point *p) +{ + return EC_POINT_invert(e->group, (EC_POINT *) p, e->bnctx) ? 0 : -1; +} + + +int crypto_ec_point_solve_y_coord(struct crypto_ec *e, + struct crypto_ec_point *p, + const struct crypto_bignum *x, int y_bit) +{ + if (!EC_POINT_set_compressed_coordinates_GFp(e->group, (EC_POINT *) p, + (const BIGNUM *) x, y_bit, + e->bnctx) || + !EC_POINT_is_on_curve(e->group, (EC_POINT *) p, e->bnctx)) + return -1; + return 0; +} + + +struct crypto_bignum * +crypto_ec_point_compute_y_sqr(struct crypto_ec *e, + const struct crypto_bignum *x) +{ + BIGNUM *tmp, *tmp2, *y_sqr = NULL; + + tmp = BN_new(); + tmp2 = BN_new(); + + /* y^2 = x^3 + ax + b */ + if (tmp && tmp2 && + BN_mod_sqr(tmp, (const BIGNUM *) x, e->prime, e->bnctx) && + BN_mod_mul(tmp, tmp, (const BIGNUM *) x, e->prime, e->bnctx) && + BN_mod_mul(tmp2, e->a, (const BIGNUM *) x, e->prime, e->bnctx) && + BN_mod_add_quick(tmp2, tmp2, tmp, e->prime) && + BN_mod_add_quick(tmp2, tmp2, e->b, e->prime)) { + y_sqr = tmp2; + tmp2 = NULL; + } + + BN_clear_free(tmp); + BN_clear_free(tmp2); + + return (struct crypto_bignum *) y_sqr; +} + + +int crypto_ec_point_is_at_infinity(struct crypto_ec *e, + const struct crypto_ec_point *p) +{ + return EC_POINT_is_at_infinity(e->group, (const EC_POINT *) p); +} + + +int crypto_ec_point_is_on_curve(struct crypto_ec *e, + const struct crypto_ec_point *p) +{ + return EC_POINT_is_on_curve(e->group, (const EC_POINT *) p, + e->bnctx) == 1; +} + + +int crypto_ec_point_cmp(const struct crypto_ec *e, + const struct crypto_ec_point *a, + const struct crypto_ec_point *b) +{ + return EC_POINT_cmp(e->group, (const EC_POINT *) a, + (const EC_POINT *) b, e->bnctx); +} + +#endif /* CONFIG_ECC */