contrib/wpa_supplicant-0.5.8/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 int fips186_2_prf(const u8 *seed, size_t seed_len, u8 *x, size_t xlen)
  96 {
  97         /* FIX: how to do this with libgcrypt? */
  98         return -1;
  99 }
 100
 101
 102 void * aes_encrypt_init(const u8 *key, size_t len)
 103 {
 104         gcry_cipher_hd_t hd;
 105
 106         if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
 107             GPG_ERR_NO_ERROR) {
 108                 printf("cipher open failed\n");
 109                 return NULL;
 110         }
 111         if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
 112                 printf("setkey failed\n");
 113                 gcry_cipher_close(hd);
 114                 return NULL;
 115         }
 116
 117         return hd;
 118 }
 119
 120
 121 void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
 122 {
 123         gcry_cipher_hd_t hd = ctx;
 124         gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
 125 }
 126
 127
 128 void aes_encrypt_deinit(void *ctx)
 129 {
 130         gcry_cipher_hd_t hd = ctx;
 131         gcry_cipher_close(hd);
 132 }
 133
 134
 135 void * aes_decrypt_init(const u8 *key, size_t len)
 136 {
 137         gcry_cipher_hd_t hd;
 138
 139         if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
 140             GPG_ERR_NO_ERROR)
 141                 return NULL;
 142         if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
 143                 gcry_cipher_close(hd);
 144                 return NULL;
 145         }
 146
 147         return hd;
 148 }
 149
 150
 151 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
 152 {
 153         gcry_cipher_hd_t hd = ctx;
 154         gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
 155 }
 156
 157
 158 void aes_decrypt_deinit(void *ctx)
 159 {
 160         gcry_cipher_hd_t hd = ctx;
 161         gcry_cipher_close(hd);
 162 }
 163 #endif /* EAP_TLS_FUNCS */