dist/wpa/src/crypto/crypto_gnutls.c

   1 /*
   2  * WPA Supplicant / wrapper functions for libgcrypt
   3  * Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
   4  *
   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.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <gcrypt.h>
  17
  18 #include "common.h"
  19 #include "crypto.h"
  20
  21 void md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
  22 {
  23         gcry_md_hd_t hd;
  24         unsigned char *p;
  25         size_t i;
  26
  27         if (gcry_md_open(&hd, GCRY_MD_MD4, 0) != GPG_ERR_NO_ERROR)
  28                 return;
  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);
  32         if (p)
  33                 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD4));
  34         gcry_md_close(hd);
  35 }
  36
  37
  38 void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
  39 {
  40         gcry_cipher_hd_t hd;
  41         u8 pkey[8], next, tmp;
  42         int i;
  43
  44         /* Add parity bits to the key */
  45         next = 0;
  46         for (i = 0; i < 7; i++) {
  47                 tmp = key[i];
  48                 pkey[i] = (tmp >> i) | next | 1;
  49                 next = tmp << (7 - i);
  50         }
  51         pkey[i] = next | 1;
  52
  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);
  57 }
  58
  59
  60 #ifdef EAP_TLS_FUNCS
  61 void md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
  62 {
  63         gcry_md_hd_t hd;
  64         unsigned char *p;
  65         size_t i;
  66
  67         if (gcry_md_open(&hd, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)
  68                 return;
  69         for (i = 0; i < num_elem; i++)
  70                 gcry_md_write(hd, addr[i], len[i]);
  71         p = gcry_md_read(hd, GCRY_MD_MD5);
  72         if (p)
  73                 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD5));
  74         gcry_md_close(hd);
  75 }
  76
  77
  78 void sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
  79 {
  80         gcry_md_hd_t hd;
  81         unsigned char *p;
  82         size_t i;
  83
  84         if (gcry_md_open(&hd, GCRY_MD_SHA1, 0) != GPG_ERR_NO_ERROR)
  85                 return;
  86         for (i = 0; i < num_elem; i++)
  87                 gcry_md_write(hd, addr[i], len[i]);
  88         p = gcry_md_read(hd, GCRY_MD_SHA1);
  89         if (p)
  90                 memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_SHA1));
  91         gcry_md_close(hd);
  92 }
  93
  94
  95 #ifndef CONFIG_NO_FIPS186_2_PRF
  96 int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
  97 {
  98         /* FIX: how to do this with libgcrypt? */
  99         return -1;
 100 }
 101 #endif /* CONFIG_NO_FIPS186_2_PRF */
 102
 103
 104 void * aes_encrypt_init(const u8 *key, size_t len)
 105 {
 106         gcry_cipher_hd_t hd;
 107
 108         if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
 109             GPG_ERR_NO_ERROR) {
 110                 printf("cipher open failed\n");
 111                 return NULL;
 112         }
 113         if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
 114                 printf("setkey failed\n");
 115                 gcry_cipher_close(hd);
 116                 return NULL;
 117         }
 118
 119         return hd;
 120 }
 121
 122
 123 void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
 124 {
 125         gcry_cipher_hd_t hd = ctx;
 126         gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
 127 }
 128
 129
 130 void aes_encrypt_deinit(void *ctx)
 131 {
 132         gcry_cipher_hd_t hd = ctx;
 133         gcry_cipher_close(hd);
 134 }
 135
 136
 137 void * aes_decrypt_init(const u8 *key, size_t len)
 138 {
 139         gcry_cipher_hd_t hd;
 140
 141         if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
 142             GPG_ERR_NO_ERROR)
 143                 return NULL;
 144         if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
 145                 gcry_cipher_close(hd);
 146                 return NULL;
 147         }
 148
 149         return hd;
 150 }
 151
 152
 153 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
 154 {
 155         gcry_cipher_hd_t hd = ctx;
 156         gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
 157 }
 158
 159
 160 void aes_decrypt_deinit(void *ctx)
 161 {
 162         gcry_cipher_hd_t hd = ctx;
 163         gcry_cipher_close(hd);
 164 }
 165 #endif /* EAP_TLS_FUNCS */