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/*
* Copyright (c) Edward Thomson. All rights reserved.
*
* This file is part of ntlmclient, distributed under the MIT license.
* For full terms and copyright information, and for third-party
* copyright information, see the included LICENSE.txt file.
*/
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <CommonCrypto/CommonCrypto.h>
#include "ntlm.h"
#include "crypt.h"
bool ntlm_random_bytes(
ntlm_client *ntlm,
unsigned char *out,
size_t len)
{
int fd, ret;
size_t total = 0;
if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
ntlm_client_set_errmsg(ntlm, strerror(errno));
return false;
}
while (total < len) {
if ((ret = read(fd, out, (len - total))) < 0) {
ntlm_client_set_errmsg(ntlm, strerror(errno));
return false;
} else if (ret == 0) {
ntlm_client_set_errmsg(ntlm, "unexpected eof on random device");
return false;
}
total += ret;
}
close(fd);
return true;
}
bool ntlm_des_encrypt(
ntlm_des_block *out,
ntlm_des_block *plaintext,
ntlm_des_block *key)
{
size_t written;
CCCryptorStatus result = CCCrypt(kCCEncrypt,
kCCAlgorithmDES, kCCOptionECBMode,
key, sizeof(ntlm_des_block), NULL,
plaintext, sizeof(ntlm_des_block),
out, sizeof(ntlm_des_block), &written);
return (result == kCCSuccess) ? true : false;
}
bool ntlm_md4_digest(
unsigned char out[CRYPT_MD4_DIGESTSIZE],
const unsigned char *in,
size_t in_len)
{
return !!CC_MD4(in, in_len, out);
}
ntlm_hmac_ctx *ntlm_hmac_ctx_init(void)
{
return calloc(1, sizeof(ntlm_hmac_ctx));
}
bool ntlm_hmac_ctx_reset(ntlm_hmac_ctx *ctx)
{
memset(ctx, 0, sizeof(ntlm_hmac_ctx));
return true;
}
bool ntlm_hmac_md5_init(
ntlm_hmac_ctx *ctx,
const unsigned char *key,
size_t key_len)
{
CCHmacInit(&ctx->native, kCCHmacAlgMD5, key, key_len);
return true;
}
bool ntlm_hmac_md5_update(
ntlm_hmac_ctx *ctx,
const unsigned char *data,
size_t data_len)
{
CCHmacUpdate(&ctx->native, data, data_len);
return true;
}
bool ntlm_hmac_md5_final(
unsigned char *out,
size_t *out_len,
ntlm_hmac_ctx *ctx)
{
if (*out_len < CRYPT_MD5_DIGESTSIZE)
return false;
CCHmacFinal(&ctx->native, out);
*out_len = CRYPT_MD5_DIGESTSIZE;
return true;
}
void ntlm_hmac_ctx_free(ntlm_hmac_ctx *ctx)
{
free(ctx);
}
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