2 * WPA Supplicant / wrapper functions for libgcrypt
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
21 void md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
27 if (gcry_md_open(&hd, GCRY_MD_MD4, 0) != GPG_ERR_NO_ERROR)
29 for (i = 0; i < num_elem; i++)
30 gcry_md_write(hd, addr[i], len[i]);
31 p = gcry_md_read(hd, GCRY_MD_MD4);
33 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD4));
38 void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
41 u8 pkey[8], next, tmp;
44 /* Add parity bits to the key */
46 for (i = 0; i < 7; i++) {
48 pkey[i] = (tmp >> i) | next | 1;
49 next = tmp << (7 - i);
53 gcry_cipher_open(&hd, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
54 gcry_err_code(gcry_cipher_setkey(hd, pkey, 8));
55 gcry_cipher_encrypt(hd, cypher, 8, clear, 8);
56 gcry_cipher_close(hd);
60 void md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
66 if (gcry_md_open(&hd, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)
68 for (i = 0; i < num_elem; i++)
69 gcry_md_write(hd, addr[i], len[i]);
70 p = gcry_md_read(hd, GCRY_MD_MD5);
72 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD5));
77 void sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
83 if (gcry_md_open(&hd, GCRY_MD_SHA1, 0) != GPG_ERR_NO_ERROR)
85 for (i = 0; i < num_elem; i++)
86 gcry_md_write(hd, addr[i], len[i]);
87 p = gcry_md_read(hd, GCRY_MD_SHA1);
89 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_SHA1));
94 #ifndef CONFIG_NO_FIPS186_2_PRF
95 int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
97 /* FIX: how to do this with libgcrypt? */
100 #endif /* CONFIG_NO_FIPS186_2_PRF */
103 void * aes_encrypt_init(const u8 *key, size_t len)
107 if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
109 printf("cipher open failed\n");
112 if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
113 printf("setkey failed\n");
114 gcry_cipher_close(hd);
122 void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
124 gcry_cipher_hd_t hd = ctx;
125 gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
129 void aes_encrypt_deinit(void *ctx)
131 gcry_cipher_hd_t hd = ctx;
132 gcry_cipher_close(hd);
136 void * aes_decrypt_init(const u8 *key, size_t len)
140 if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
143 if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
144 gcry_cipher_close(hd);
152 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
154 gcry_cipher_hd_t hd = ctx;
155 gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
159 void aes_decrypt_deinit(void *ctx)
161 gcry_cipher_hd_t hd = ctx;
162 gcry_cipher_close(hd);
166 int crypto_mod_exp(const u8 *base, size_t base_len,
167 const u8 *power, size_t power_len,
168 const u8 *modulus, size_t modulus_len,
169 u8 *result, size_t *result_len)
171 gcry_mpi_t bn_base = NULL, bn_exp = NULL, bn_modulus = NULL,
175 if (gcry_mpi_scan(&bn_base, GCRYMPI_FMT_USG, base, base_len, NULL) !=
177 gcry_mpi_scan(&bn_exp, GCRYMPI_FMT_USG, power, power_len, NULL) !=
179 gcry_mpi_scan(&bn_modulus, GCRYMPI_FMT_USG, modulus, modulus_len,
180 NULL) != GPG_ERR_NO_ERROR)
182 bn_result = gcry_mpi_new(modulus_len * 8);
184 gcry_mpi_powm(bn_result, bn_base, bn_exp, bn_modulus);
186 if (gcry_mpi_print(GCRYMPI_FMT_USG, result, *result_len, result_len,
187 bn_result) != GPG_ERR_NO_ERROR)
193 gcry_mpi_release(bn_base);
194 gcry_mpi_release(bn_exp);
195 gcry_mpi_release(bn_modulus);
196 gcry_mpi_release(bn_result);
201 struct crypto_cipher {
202 gcry_cipher_hd_t enc;
203 gcry_cipher_hd_t dec;
207 struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
208 const u8 *iv, const u8 *key,
211 struct crypto_cipher *ctx;
213 enum gcry_cipher_algos a;
216 ctx = os_zalloc(sizeof(*ctx));
221 case CRYPTO_CIPHER_ALG_RC4:
222 a = GCRY_CIPHER_ARCFOUR;
223 res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_STREAM,
225 gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_STREAM, 0);
227 case CRYPTO_CIPHER_ALG_AES:
229 a = GCRY_CIPHER_AES192;
230 else if (key_len == 32)
231 a = GCRY_CIPHER_AES256;
234 res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
235 gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
237 case CRYPTO_CIPHER_ALG_3DES:
238 a = GCRY_CIPHER_3DES;
239 res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
240 gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
242 case CRYPTO_CIPHER_ALG_DES:
244 res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
245 gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
247 case CRYPTO_CIPHER_ALG_RC2:
249 a = GCRY_CIPHER_RFC2268_40;
251 a = GCRY_CIPHER_RFC2268_128;
252 res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
253 gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
260 if (res != GPG_ERR_NO_ERROR) {
265 if (gcry_cipher_setkey(ctx->enc, key, key_len) != GPG_ERR_NO_ERROR ||
266 gcry_cipher_setkey(ctx->dec, key, key_len) != GPG_ERR_NO_ERROR) {
267 gcry_cipher_close(ctx->enc);
268 gcry_cipher_close(ctx->dec);
273 ivlen = gcry_cipher_get_algo_blklen(a);
274 if (gcry_cipher_setiv(ctx->enc, iv, ivlen) != GPG_ERR_NO_ERROR ||
275 gcry_cipher_setiv(ctx->dec, iv, ivlen) != GPG_ERR_NO_ERROR) {
276 gcry_cipher_close(ctx->enc);
277 gcry_cipher_close(ctx->dec);
286 int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
287 u8 *crypt, size_t len)
289 if (gcry_cipher_encrypt(ctx->enc, crypt, len, plain, len) !=
296 int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
297 u8 *plain, size_t len)
299 if (gcry_cipher_decrypt(ctx->dec, plain, len, crypt, len) !=
306 void crypto_cipher_deinit(struct crypto_cipher *ctx)
308 gcry_cipher_close(ctx->enc);
309 gcry_cipher_close(ctx->dec);