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164 lines
3.4 KiB
C
164 lines
3.4 KiB
C
/*
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* WPA Supplicant / wrapper functions for libgcrypt
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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 <stdio.h>
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#include <sys/types.h>
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#include <gcrypt.h>
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#include "common.h"
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#include "crypto.h"
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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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gcry_md_hd_t hd;
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unsigned char *p;
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int i;
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if (gcry_md_open(&hd, GCRY_MD_MD4, 0) != GPG_ERR_NO_ERROR)
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return;
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for (i = 0; i < num_elem; i++)
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gcry_md_write(hd, addr[i], len[i]);
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p = gcry_md_read(hd, GCRY_MD_MD4);
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if (p)
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memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD4));
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gcry_md_close(hd);
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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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gcry_cipher_hd_t hd;
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u8 pkey[8], next, tmp;
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int i;
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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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gcry_cipher_open(&hd, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
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gcry_err_code(gcry_cipher_setkey(hd, pkey, 8));
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gcry_cipher_encrypt(hd, cypher, 8, clear, 8);
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gcry_cipher_close(hd);
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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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gcry_md_hd_t hd;
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unsigned char *p;
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int i;
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if (gcry_md_open(&hd, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)
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return;
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for (i = 0; i < num_elem; i++)
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gcry_md_write(hd, addr[i], len[i]);
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p = gcry_md_read(hd, GCRY_MD_MD5);
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if (p)
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memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD5));
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gcry_md_close(hd);
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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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gcry_md_hd_t hd;
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unsigned char *p;
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int i;
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if (gcry_md_open(&hd, GCRY_MD_SHA1, 0) != GPG_ERR_NO_ERROR)
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return;
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for (i = 0; i < num_elem; i++)
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gcry_md_write(hd, addr[i], len[i]);
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p = gcry_md_read(hd, GCRY_MD_SHA1);
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if (p)
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memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_SHA1));
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gcry_md_close(hd);
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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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/* FIX: how to do this with libgcrypt? */
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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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gcry_cipher_hd_t hd;
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if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
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GPG_ERR_NO_ERROR) {
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printf("cipher open failed\n");
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return NULL;
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}
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if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
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printf("setkey failed\n");
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gcry_cipher_close(hd);
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return NULL;
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}
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return hd;
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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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gcry_cipher_hd_t hd = ctx;
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gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
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}
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void aes_encrypt_deinit(void *ctx)
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{
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gcry_cipher_hd_t hd = ctx;
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gcry_cipher_close(hd);
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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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gcry_cipher_hd_t hd;
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if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
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GPG_ERR_NO_ERROR)
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return NULL;
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if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
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gcry_cipher_close(hd);
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return NULL;
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}
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return hd;
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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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gcry_cipher_hd_t hd = ctx;
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gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
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}
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void aes_decrypt_deinit(void *ctx)
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{
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gcry_cipher_hd_t hd = ctx;
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gcry_cipher_close(hd);
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}
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#endif /* EAP_TLS_FUNCS */
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