1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <string.h>
12#include <openssl/crypto.h>
13#include <openssl/sha.h>
14
15unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md)
16{
17 SHA_CTX c;
18 static unsigned char m[SHA_DIGEST_LENGTH];
19
20 if (md == NULL)
21 md = m;
22 if (!SHA1_Init(&c))
23 return NULL;
24 SHA1_Update(&c, d, n);
25 SHA1_Final(md, &c);
26 OPENSSL_cleanse(&c, sizeof(c));
27 return md;
28}
29