--- /dev/null
+/*
+ * WPA Supplicant / wrapper functions for libcrypto
+ * Copyright (c) 2004-2009, 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.
+ */
+
+#include "includes.h"
+#include <openssl/opensslv.h>
+#include <openssl/err.h>
+#include <openssl/des.h>
+#include <openssl/aes.h>
+#include <openssl/bn.h>
+#include <openssl/evp.h>
+#include <openssl/dh.h>
+
+#include "common.h"
+#include "wpabuf.h"
+#include "dh_group5.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
+ 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,
+ 0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,0x02,0x0B,0xBE,0xA6,
+ 0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,0x8E,0x34,0x04,0xDD,
+ 0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,0x30,0x2B,0x0A,0x6D,
+ 0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,0x6D,0x51,0xC2,0x45,
+ 0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,0xF4,0x4C,0x42,0xE9,
+ 0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,0xF4,0x06,0xB7,0xED,
+ 0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,0xAE,0x9F,0x24,0x11,
+ 0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,0xEC,0xE4,0x5B,0x3D,
+ 0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,0x98,0xDA,0x48,0x36,
+ 0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,0xFD,0x24,0xCF,0x5F,
+ 0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,0x1C,0x62,0xF3,0x56,
+ 0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,0x70,0x96,0x96,0x6D,
+ 0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,0xF1,0x74,0x6C,0x08,
+ 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 */
+ return get_rfc3526_prime_1536(NULL);
+#endif /* openssl < 0.9.8 */
+}
+
+#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)
+{
+ 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));
+ return -1;
+ }
+ for (i = 0; i < num_elem; i++) {
+ if (!EVP_DigestUpdate(&ctx, addr[i], len[i])) {
+ wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestUpdate "
+ "failed: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ return -1;
+ }
+ }
+ if (!EVP_DigestFinal(&ctx, mac, &mac_len)) {
+ wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestFinal failed: %s",
+ ERR_error_string(ERR_get_error(), NULL));
+ return -1;
+ }
+
+ return 0;
+}
+
+
+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);
+}
+
+
+void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
+{
+ u8 pkey[8], next, tmp;
+ int i;
+ DES_key_schedule ks;
+
+ /* Add parity bits to the key */
+ next = 0;
+ for (i = 0; i < 7; i++) {
+ tmp = key[i];
+ pkey[i] = (tmp >> i) | next | 1;
+ next = tmp << (7 - i);
+ }
+ pkey[i] = next | 1;
+
+ DES_set_key(&pkey, &ks);
+ DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
+ DES_ENCRYPT);
+}
+
+
+int rc4_skip(const u8 *key, size_t keylen, size_t skip,
+ u8 *data, size_t data_len)
+{
+#ifdef OPENSSL_NO_RC4
+ return -1;
+#else /* OPENSSL_NO_RC4 */
+ EVP_CIPHER_CTX ctx;
+ int outl;
+ int res = -1;
+ unsigned char skip_buf[16];
+
+ EVP_CIPHER_CTX_init(&ctx);
+ if (!EVP_CIPHER_CTX_set_padding(&ctx, 0) ||
+ !EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, NULL, NULL, 1) ||
+ !EVP_CIPHER_CTX_set_key_length(&ctx, keylen) ||
+ !EVP_CipherInit_ex(&ctx, NULL, NULL, key, NULL, 1))
+ goto out;
+
+ while (skip >= sizeof(skip_buf)) {
+ size_t len = skip;
+ if (len > sizeof(skip_buf))
+ len = sizeof(skip_buf);
+ if (!EVP_CipherUpdate(&ctx, skip_buf, &outl, skip_buf, len))
+ goto out;
+ skip -= len;
+ }
+
+ if (EVP_CipherUpdate(&ctx, data, &outl, data, data_len))
+ res = 0;
+
+out:
+ EVP_CIPHER_CTX_cleanup(&ctx);
+ return res;
+#endif /* OPENSSL_NO_RC4 */
+}
+
+
+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);
+}
+#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);
+}
+
+
+#ifndef NO_SHA256_WRAPPER
+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);
+}
+#endif /* NO_SHA256_WRAPPER */
+
+
+void * aes_encrypt_init(const u8 *key, size_t len)
+{
+ AES_KEY *ak;
+ ak = os_malloc(sizeof(*ak));
+ if (ak == NULL)
+ return NULL;
+ if (AES_set_encrypt_key(key, 8 * len, ak) < 0) {
+ os_free(ak);
+ return NULL;
+ }
+ return ak;
+}
+
+
+void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
+{
+ AES_encrypt(plain, crypt, ctx);
+}
+
+
+void aes_encrypt_deinit(void *ctx)
+{
+ os_free(ctx);
+}
+
+
+void * aes_decrypt_init(const u8 *key, size_t len)
+{
+ AES_KEY *ak;
+ ak = os_malloc(sizeof(*ak));
+ if (ak == NULL)
+ return NULL;
+ if (AES_set_decrypt_key(key, 8 * len, ak) < 0) {
+ os_free(ak);
+ return NULL;
+ }
+ return ak;
+}
+
+
+void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
+{
+ AES_decrypt(crypt, plain, ctx);
+}
+
+
+void aes_decrypt_deinit(void *ctx)
+{
+ os_free(ctx);
+}
+
+
+int crypto_mod_exp(const u8 *base, size_t base_len,
+ const u8 *power, size_t power_len,
+ const u8 *modulus, size_t modulus_len,
+ u8 *result, size_t *result_len)
+{
+ BIGNUM *bn_base, *bn_exp, *bn_modulus, *bn_result;
+ int ret = -1;
+ BN_CTX *ctx;
+
+ ctx = BN_CTX_new();
+ if (ctx == NULL)
+ return -1;
+
+ bn_base = BN_bin2bn(base, base_len, NULL);
+ bn_exp = BN_bin2bn(power, power_len, NULL);
+ bn_modulus = BN_bin2bn(modulus, modulus_len, NULL);
+ bn_result = BN_new();
+
+ if (bn_base == NULL || bn_exp == NULL || bn_modulus == NULL ||
+ bn_result == NULL)
+ goto error;
+
+ if (BN_mod_exp(bn_result, bn_base, bn_exp, bn_modulus, ctx) != 1)
+ goto error;
+
+ *result_len = BN_bn2bin(bn_result, result);
+ ret = 0;
+
+error:
+ BN_free(bn_base);
+ BN_free(bn_exp);
+ BN_free(bn_modulus);
+ BN_free(bn_result);
+ BN_CTX_free(ctx);
+ return ret;
+}
+
+
+struct crypto_cipher {
+ EVP_CIPHER_CTX enc;
+ EVP_CIPHER_CTX dec;
+};
+
+
+struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
+ const u8 *iv, const u8 *key,
+ size_t key_len)
+{
+ struct crypto_cipher *ctx;
+ const EVP_CIPHER *cipher;
+
+ ctx = os_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return NULL;
+
+ switch (alg) {
+#ifndef OPENSSL_NO_RC4
+ case CRYPTO_CIPHER_ALG_RC4:
+ cipher = EVP_rc4();
+ break;
+#endif /* OPENSSL_NO_RC4 */
+#ifndef OPENSSL_NO_AES
+ case CRYPTO_CIPHER_ALG_AES:
+ switch (key_len) {
+ case 16:
+ cipher = EVP_aes_128_cbc();
+ break;
+ case 24:
+ cipher = EVP_aes_192_cbc();
+ break;
+ case 32:
+ cipher = EVP_aes_256_cbc();
+ break;
+ default:
+ os_free(ctx);
+ return NULL;
+ }
+ break;
+#endif /* OPENSSL_NO_AES */
+#ifndef OPENSSL_NO_DES
+ case CRYPTO_CIPHER_ALG_3DES:
+ cipher = EVP_des_ede3_cbc();
+ break;
+ case CRYPTO_CIPHER_ALG_DES:
+ cipher = EVP_des_cbc();
+ break;
+#endif /* OPENSSL_NO_DES */
+#ifndef OPENSSL_NO_RC2
+ case CRYPTO_CIPHER_ALG_RC2:
+ cipher = EVP_rc2_ecb();
+ break;
+#endif /* OPENSSL_NO_RC2 */
+ default:
+ os_free(ctx);
+ return NULL;
+ }
+
+ EVP_CIPHER_CTX_init(&ctx->enc);
+ EVP_CIPHER_CTX_set_padding(&ctx->enc, 0);
+ if (!EVP_EncryptInit_ex(&ctx->enc, cipher, NULL, NULL, NULL) ||
+ !EVP_CIPHER_CTX_set_key_length(&ctx->enc, key_len) ||
+ !EVP_EncryptInit_ex(&ctx->enc, NULL, NULL, key, iv)) {
+ EVP_CIPHER_CTX_cleanup(&ctx->enc);
+ os_free(ctx);
+ return NULL;
+ }
+
+ EVP_CIPHER_CTX_init(&ctx->dec);
+ EVP_CIPHER_CTX_set_padding(&ctx->dec, 0);
+ if (!EVP_DecryptInit_ex(&ctx->dec, cipher, NULL, NULL, NULL) ||
+ !EVP_CIPHER_CTX_set_key_length(&ctx->dec, key_len) ||
+ !EVP_DecryptInit_ex(&ctx->dec, NULL, NULL, key, iv)) {
+ EVP_CIPHER_CTX_cleanup(&ctx->enc);
+ EVP_CIPHER_CTX_cleanup(&ctx->dec);
+ os_free(ctx);
+ return NULL;
+ }
+
+ return ctx;
+}
+
+
+int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
+ u8 *crypt, size_t len)
+{
+ int outl;
+ if (!EVP_EncryptUpdate(&ctx->enc, crypt, &outl, plain, len))
+ return -1;
+ return 0;
+}
+
+
+int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
+ u8 *plain, size_t len)
+{
+ int outl;
+ outl = len;
+ if (!EVP_DecryptUpdate(&ctx->dec, plain, &outl, crypt, len))
+ return -1;
+ return 0;
+}
+
+
+void crypto_cipher_deinit(struct crypto_cipher *ctx)
+{
+ EVP_CIPHER_CTX_cleanup(&ctx->enc);
+ EVP_CIPHER_CTX_cleanup(&ctx->dec);
+ os_free(ctx);
+}
+
+
+void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
+{
+ DH *dh;
+ struct wpabuf *pubkey = NULL, *privkey = NULL;
+ size_t publen, privlen;
+
+ *priv = NULL;
+ *publ = NULL;
+
+ 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;
+
+ if (DH_generate_key(dh) != 1)
+ goto err;
+
+ publen = BN_num_bytes(dh->pub_key);
+ pubkey = wpabuf_alloc(publen);
+ if (pubkey == NULL)
+ goto err;
+ privlen = BN_num_bytes(dh->priv_key);
+ privkey = wpabuf_alloc(privlen);
+ if (privkey == NULL)
+ goto err;
+
+ BN_bn2bin(dh->pub_key, wpabuf_put(pubkey, publen));
+ BN_bn2bin(dh->priv_key, wpabuf_put(privkey, privlen));
+
+ *priv = privkey;
+ *publ = pubkey;
+ return dh;
+
+err:
+ wpabuf_free(pubkey);
+ wpabuf_free(privkey);
+ DH_free(dh);
+ return NULL;
+}
+
+
+struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public,
+ const struct wpabuf *own_private)
+{
+ BIGNUM *pub_key;
+ struct wpabuf *res = NULL;
+ size_t rlen;
+ DH *dh = ctx;
+ int keylen;
+
+ if (ctx == NULL)
+ return NULL;
+
+ pub_key = BN_bin2bn(wpabuf_head(peer_public), wpabuf_len(peer_public),
+ NULL);
+ if (pub_key == NULL)
+ return NULL;
+
+ rlen = DH_size(dh);
+ res = wpabuf_alloc(rlen);
+ if (res == NULL)
+ goto err;
+
+ keylen = DH_compute_key(wpabuf_mhead(res), pub_key, dh);
+ if (keylen < 0)
+ goto err;
+ wpabuf_put(res, keylen);
+ BN_free(pub_key);
+
+ return res;
+
+err:
+ BN_free(pub_key);
+ wpabuf_free(res);
+ return NULL;
+}
+
+
+void dh5_free(void *ctx)
+{
+ DH *dh;
+ if (ctx == NULL)
+ return;
+ dh = ctx;
+ DH_free(dh);
+}
projects / mech_eap.orig / blobdiff