+++ /dev/null
-/*
- * WPA Supplicant / wrapper functions for libgcrypt
- * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "includes.h"
-#include <gcrypt.h>
-
-#include "common.h"
-#include "crypto.h"
-
-int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
-{
- gcry_md_hd_t hd;
- unsigned char *p;
- size_t i;
-
- if (gcry_md_open(&hd, GCRY_MD_MD4, 0) != GPG_ERR_NO_ERROR)
- return -1;
- for (i = 0; i < num_elem; i++)
- gcry_md_write(hd, addr[i], len[i]);
- p = gcry_md_read(hd, GCRY_MD_MD4);
- if (p)
- memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD4));
- gcry_md_close(hd);
- return 0;
-}
-
-
-void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
-{
- gcry_cipher_hd_t hd;
- u8 pkey[8], next, tmp;
- int i;
-
- /* Add parity bits to the key */
- next = 0;
- for (i = 0; i < 7; i++) {
- tmp = key[i];
- pkey[i] = (tmp >> i) | next | 1;
- next = tmp << (7 - i);
- }
- pkey[i] = next | 1;
-
- gcry_cipher_open(&hd, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
- gcry_err_code(gcry_cipher_setkey(hd, pkey, 8));
- gcry_cipher_encrypt(hd, cypher, 8, clear, 8);
- gcry_cipher_close(hd);
-}
-
-
-int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
-{
- gcry_md_hd_t hd;
- unsigned char *p;
- size_t i;
-
- if (gcry_md_open(&hd, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)
- return -1;
- for (i = 0; i < num_elem; i++)
- gcry_md_write(hd, addr[i], len[i]);
- p = gcry_md_read(hd, GCRY_MD_MD5);
- if (p)
- memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_MD5));
- gcry_md_close(hd);
- return 0;
-}
-
-
-int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
-{
- gcry_md_hd_t hd;
- unsigned char *p;
- size_t i;
-
- if (gcry_md_open(&hd, GCRY_MD_SHA1, 0) != GPG_ERR_NO_ERROR)
- return -1;
- for (i = 0; i < num_elem; i++)
- gcry_md_write(hd, addr[i], len[i]);
- p = gcry_md_read(hd, GCRY_MD_SHA1);
- if (p)
- memcpy(mac, p, gcry_md_get_algo_dlen(GCRY_MD_SHA1));
- gcry_md_close(hd);
- return 0;
-}
-
-
-void * aes_encrypt_init(const u8 *key, size_t len)
-{
- gcry_cipher_hd_t hd;
-
- if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
- GPG_ERR_NO_ERROR) {
- printf("cipher open failed\n");
- return NULL;
- }
- if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
- printf("setkey failed\n");
- gcry_cipher_close(hd);
- return NULL;
- }
-
- return hd;
-}
-
-
-void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
-{
- gcry_cipher_hd_t hd = ctx;
- gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
-}
-
-
-void aes_encrypt_deinit(void *ctx)
-{
- gcry_cipher_hd_t hd = ctx;
- gcry_cipher_close(hd);
-}
-
-
-void * aes_decrypt_init(const u8 *key, size_t len)
-{
- gcry_cipher_hd_t hd;
-
- if (gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0) !=
- GPG_ERR_NO_ERROR)
- return NULL;
- if (gcry_cipher_setkey(hd, key, len) != GPG_ERR_NO_ERROR) {
- gcry_cipher_close(hd);
- return NULL;
- }
-
- return hd;
-}
-
-
-void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
-{
- gcry_cipher_hd_t hd = ctx;
- gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
-}
-
-
-void aes_decrypt_deinit(void *ctx)
-{
- gcry_cipher_hd_t hd = ctx;
- gcry_cipher_close(hd);
-}
-
-
-int crypto_mod_exp(const u8 *base, size_t base_len,
- const u8 *power, size_t power_len,
- const u8 *modulus, size_t modulus_len,
- u8 *result, size_t *result_len)
-{
- gcry_mpi_t bn_base = NULL, bn_exp = NULL, bn_modulus = NULL,
- bn_result = NULL;
- int ret = -1;
-
- if (gcry_mpi_scan(&bn_base, GCRYMPI_FMT_USG, base, base_len, NULL) !=
- GPG_ERR_NO_ERROR ||
- gcry_mpi_scan(&bn_exp, GCRYMPI_FMT_USG, power, power_len, NULL) !=
- GPG_ERR_NO_ERROR ||
- gcry_mpi_scan(&bn_modulus, GCRYMPI_FMT_USG, modulus, modulus_len,
- NULL) != GPG_ERR_NO_ERROR)
- goto error;
- bn_result = gcry_mpi_new(modulus_len * 8);
-
- gcry_mpi_powm(bn_result, bn_base, bn_exp, bn_modulus);
-
- if (gcry_mpi_print(GCRYMPI_FMT_USG, result, *result_len, result_len,
- bn_result) != GPG_ERR_NO_ERROR)
- goto error;
-
- ret = 0;
-
-error:
- gcry_mpi_release(bn_base);
- gcry_mpi_release(bn_exp);
- gcry_mpi_release(bn_modulus);
- gcry_mpi_release(bn_result);
- return ret;
-}
-
-
-struct crypto_cipher {
- gcry_cipher_hd_t enc;
- gcry_cipher_hd_t dec;
-};
-
-
-struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
- const u8 *iv, const u8 *key,
- size_t key_len)
-{
- struct crypto_cipher *ctx;
- gcry_error_t res;
- enum gcry_cipher_algos a;
- int ivlen;
-
- ctx = os_zalloc(sizeof(*ctx));
- if (ctx == NULL)
- return NULL;
-
- switch (alg) {
- case CRYPTO_CIPHER_ALG_RC4:
- a = GCRY_CIPHER_ARCFOUR;
- res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_STREAM,
- 0);
- gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_STREAM, 0);
- break;
- case CRYPTO_CIPHER_ALG_AES:
- if (key_len == 24)
- a = GCRY_CIPHER_AES192;
- else if (key_len == 32)
- a = GCRY_CIPHER_AES256;
- else
- a = GCRY_CIPHER_AES;
- res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
- gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
- break;
- case CRYPTO_CIPHER_ALG_3DES:
- a = GCRY_CIPHER_3DES;
- res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
- gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
- break;
- case CRYPTO_CIPHER_ALG_DES:
- a = GCRY_CIPHER_DES;
- res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
- gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
- break;
- case CRYPTO_CIPHER_ALG_RC2:
- if (key_len == 5)
- a = GCRY_CIPHER_RFC2268_40;
- else
- a = GCRY_CIPHER_RFC2268_128;
- res = gcry_cipher_open(&ctx->enc, a, GCRY_CIPHER_MODE_CBC, 0);
- gcry_cipher_open(&ctx->dec, a, GCRY_CIPHER_MODE_CBC, 0);
- break;
- default:
- os_free(ctx);
- return NULL;
- }
-
- if (res != GPG_ERR_NO_ERROR) {
- os_free(ctx);
- return NULL;
- }
-
- if (gcry_cipher_setkey(ctx->enc, key, key_len) != GPG_ERR_NO_ERROR ||
- gcry_cipher_setkey(ctx->dec, key, key_len) != GPG_ERR_NO_ERROR) {
- gcry_cipher_close(ctx->enc);
- gcry_cipher_close(ctx->dec);
- os_free(ctx);
- return NULL;
- }
-
- ivlen = gcry_cipher_get_algo_blklen(a);
- if (gcry_cipher_setiv(ctx->enc, iv, ivlen) != GPG_ERR_NO_ERROR ||
- gcry_cipher_setiv(ctx->dec, iv, ivlen) != GPG_ERR_NO_ERROR) {
- gcry_cipher_close(ctx->enc);
- gcry_cipher_close(ctx->dec);
- os_free(ctx);
- return NULL;
- }
-
- return ctx;
-}
-
-
-int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
- u8 *crypt, size_t len)
-{
- if (gcry_cipher_encrypt(ctx->enc, crypt, len, plain, len) !=
- GPG_ERR_NO_ERROR)
- return -1;
- return 0;
-}
-
-
-int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
- u8 *plain, size_t len)
-{
- if (gcry_cipher_decrypt(ctx->dec, plain, len, crypt, len) !=
- GPG_ERR_NO_ERROR)
- return -1;
- return 0;
-}
-
-
-void crypto_cipher_deinit(struct crypto_cipher *ctx)
-{
- gcry_cipher_close(ctx->enc);
- gcry_cipher_close(ctx->dec);
- os_free(ctx);
-}
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