155 lines
3.0 KiB
C
155 lines
3.0 KiB
C
/*
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* WPA Supplicant / wrapper functions for libcrypto
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* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include <string.h>
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#include <sys/types.h>
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#include <openssl/md4.h>
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#include <openssl/des.h>
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#include <openssl/aes.h>
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#include "common.h"
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#include "crypto.h"
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#if OPENSSL_VERSION_NUMBER < 0x00907000
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#define DES_key_schedule des_key_schedule
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#define DES_cblock des_cblock
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#define DES_set_key(key, schedule) des_set_key((key), *(schedule))
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#define DES_ecb_encrypt(input, output, ks, enc) \
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des_ecb_encrypt((input), (output), *(ks), (enc))
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#endif /* openssl < 0.9.7 */
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void md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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MD4_CTX ctx;
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int i;
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MD4_Init(&ctx);
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for (i = 0; i < num_elem; i++)
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MD4_Update(&ctx, addr[i], len[i]);
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MD4_Final(mac, &ctx);
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}
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void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
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{
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u8 pkey[8], next, tmp;
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int i;
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DES_key_schedule ks;
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/* Add parity bits to the key */
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next = 0;
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for (i = 0; i < 7; i++) {
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tmp = key[i];
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pkey[i] = (tmp >> i) | next | 1;
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next = tmp << (7 - i);
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}
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pkey[i] = next | 1;
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DES_set_key(&pkey, &ks);
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DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
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DES_ENCRYPT);
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}
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#ifdef EAP_TLS_FUNCS
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void md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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MD5_CTX ctx;
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int i;
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MD5_Init(&ctx);
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for (i = 0; i < num_elem; i++)
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MD5_Update(&ctx, addr[i], len[i]);
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MD5_Final(mac, &ctx);
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}
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void sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
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{
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SHA_CTX ctx;
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int i;
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SHA1_Init(&ctx);
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for (i = 0; i < num_elem; i++)
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SHA1_Update(&ctx, addr[i], len[i]);
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SHA1_Final(mac, &ctx);
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}
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void sha1_transform(u8 *state, const u8 data[64])
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{
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SHA_CTX context;
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memset(&context, 0, sizeof(context));
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memcpy(&context.h0, state, 5 * 4);
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SHA1_Transform(&context, data);
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memcpy(state, &context.h0, 5 * 4);
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}
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void * aes_encrypt_init(const u8 *key, size_t len)
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{
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AES_KEY *ak;
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ak = malloc(sizeof(*ak));
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if (ak == NULL)
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return NULL;
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if (AES_set_encrypt_key(key, 8 * len, ak) < 0) {
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free(ak);
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return NULL;
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}
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return ak;
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}
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void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
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{
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AES_encrypt(plain, crypt, ctx);
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}
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void aes_encrypt_deinit(void *ctx)
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{
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free(ctx);
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}
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void * aes_decrypt_init(const u8 *key, size_t len)
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{
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AES_KEY *ak;
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ak = malloc(sizeof(*ak));
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if (ak == NULL)
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return NULL;
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if (AES_set_decrypt_key(key, 8 * len, ak) < 0) {
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free(ak);
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return NULL;
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}
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return ak;
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}
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void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
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{
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AES_decrypt(crypt, plain, ctx);
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}
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void aes_decrypt_deinit(void *ctx)
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{
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free(ctx);
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}
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#endif /* EAP_TLS_FUNCS */
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