1 /* 2 * WPA Supplicant / wrapper functions for libgcrypt 3 * Copyright (c) 2004-2005, Jouni Malinen <j (at) 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 */ 164
