268 lines
9.2 KiB
C
268 lines
9.2 KiB
C
|
/***************************************************************************
|
||
|
|
* _ _ ____ _
|
||
|
|
* Project ___| | | | _ \| |
|
||
|
|
* / __| | | | |_) | |
|
||
|
|
* | (__| |_| | _ <| |___
|
||
|
|
* \___|\___/|_| \_\_____|
|
||
|
|
*
|
||
|
|
* Copyright (C) 1998 - 2018, Florin Petriuc, <petriuc.florin@gmail.com>
|
||
|
|
*
|
||
|
|
* This software is licensed as described in the file COPYING, which
|
||
|
|
* you should have received as part of this distribution. The terms
|
||
|
|
* are also available at https://curl.haxx.se/docs/copyright.html.
|
||
|
|
*
|
||
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||
|
|
* copies of the Software, and permit persons to whom the Software is
|
||
|
|
* furnished to do so, under the terms of the COPYING file.
|
||
|
|
*
|
||
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
|
* KIND, either express or implied.
|
||
|
|
*
|
||
|
|
***************************************************************************/
|
||
|
|
|
||
|
|
#include "curl_setup.h"
|
||
|
|
|
||
|
|
#ifndef CURL_DISABLE_CRYPTO_AUTH
|
||
|
|
|
||
|
|
#include "warnless.h"
|
||
|
|
#include "curl_sha256.h"
|
||
|
|
|
||
|
|
#if defined(USE_OPENSSL)
|
||
|
|
|
||
|
|
#include <openssl/opensslv.h>
|
||
|
|
|
||
|
|
#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL)
|
||
|
|
#define USE_OPENSSL_SHA256
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef USE_OPENSSL_SHA256
|
||
|
|
/* When OpenSSL is available we use the SHA256-function from OpenSSL */
|
||
|
|
#include <openssl/sha.h>
|
||
|
|
#else
|
||
|
|
|
||
|
|
/* When no other crypto library is available we use this code segment */
|
||
|
|
|
||
|
|
/* ===== start - public domain SHA256 implementation ===== */
|
||
|
|
/* This is based on SHA256 implementation in LibTomCrypt that was released into
|
||
|
|
* public domain by Tom St Denis. */
|
||
|
|
|
||
|
|
#define WPA_GET_BE32(a) ((((unsigned long)(a)[0]) << 24) | \
|
||
|
|
(((unsigned long)(a)[1]) << 16) | \
|
||
|
|
(((unsigned long)(a)[2]) << 8) | \
|
||
|
|
((unsigned long)(a)[3]))
|
||
|
|
#define WPA_PUT_BE32(a, val) \
|
||
|
|
do { \
|
||
|
|
(a)[0] = (unsigned char)((((unsigned long) (val)) >> 24) & 0xff); \
|
||
|
|
(a)[1] = (unsigned char)((((unsigned long) (val)) >> 16) & 0xff); \
|
||
|
|
(a)[2] = (unsigned char)((((unsigned long) (val)) >> 8) & 0xff); \
|
||
|
|
(a)[3] = (unsigned char)(((unsigned long) (val)) & 0xff); \
|
||
|
|
} while(0)
|
||
|
|
|
||
|
|
#ifdef HAVE_LONGLONG
|
||
|
|
#define WPA_PUT_BE64(a, val) \
|
||
|
|
do { \
|
||
|
|
(a)[0] = (unsigned char)(((unsigned long long)(val)) >> 56); \
|
||
|
|
(a)[1] = (unsigned char)(((unsigned long long)(val)) >> 48); \
|
||
|
|
(a)[2] = (unsigned char)(((unsigned long long)(val)) >> 40); \
|
||
|
|
(a)[3] = (unsigned char)(((unsigned long long)(val)) >> 32); \
|
||
|
|
(a)[4] = (unsigned char)(((unsigned long long)(val)) >> 24); \
|
||
|
|
(a)[5] = (unsigned char)(((unsigned long long)(val)) >> 16); \
|
||
|
|
(a)[6] = (unsigned char)(((unsigned long long)(val)) >> 8); \
|
||
|
|
(a)[7] = (unsigned char)(((unsigned long long)(val)) & 0xff); \
|
||
|
|
} while(0)
|
||
|
|
#else
|
||
|
|
#define WPA_PUT_BE64(a, val) \
|
||
|
|
do { \
|
||
|
|
(a)[0] = (unsigned char)(((unsigned __int64)(val)) >> 56); \
|
||
|
|
(a)[1] = (unsigned char)(((unsigned __int64)(val)) >> 48); \
|
||
|
|
(a)[2] = (unsigned char)(((unsigned __int64)(val)) >> 40); \
|
||
|
|
(a)[3] = (unsigned char)(((unsigned __int64)(val)) >> 32); \
|
||
|
|
(a)[4] = (unsigned char)(((unsigned __int64)(val)) >> 24); \
|
||
|
|
(a)[5] = (unsigned char)(((unsigned __int64)(val)) >> 16); \
|
||
|
|
(a)[6] = (unsigned char)(((unsigned __int64)(val)) >> 8); \
|
||
|
|
(a)[7] = (unsigned char)(((unsigned __int64)(val)) & 0xff); \
|
||
|
|
} while(0)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef struct sha256_state {
|
||
|
|
#ifdef HAVE_LONGLONG
|
||
|
|
unsigned long long length;
|
||
|
|
#else
|
||
|
|
unsigned __int64 length;
|
||
|
|
#endif
|
||
|
|
unsigned long state[8], curlen;
|
||
|
|
unsigned char buf[64];
|
||
|
|
} SHA256_CTX;
|
||
|
|
/* the K array */
|
||
|
|
static const unsigned long K[64] = {
|
||
|
|
0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
|
||
|
|
0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
|
||
|
|
0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
|
||
|
|
0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
|
||
|
|
0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
|
||
|
|
0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
|
||
|
|
0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
|
||
|
|
0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
|
||
|
|
0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
|
||
|
|
0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
|
||
|
|
0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
|
||
|
|
0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
|
||
|
|
0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
|
||
|
|
};
|
||
|
|
/* Various logical functions */
|
||
|
|
#define RORc(x, y) \
|
||
|
|
(((((unsigned long)(x) & 0xFFFFFFFFUL) >> (unsigned long)((y) & 31)) | \
|
||
|
|
((unsigned long)(x) << (unsigned long)(32 - ((y) & 31)))) & 0xFFFFFFFFUL)
|
||
|
|
#define Ch(x,y,z) (z ^ (x & (y ^ z)))
|
||
|
|
#define Maj(x,y,z) (((x | y) & z) | (x & y))
|
||
|
|
#define S(x, n) RORc((x), (n))
|
||
|
|
#define R(x, n) (((x)&0xFFFFFFFFUL)>>(n))
|
||
|
|
#define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
|
||
|
|
#define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
|
||
|
|
#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
|
||
|
|
#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
|
||
|
|
/* compress 512-bits */
|
||
|
|
static int sha256_compress(struct sha256_state *md,
|
||
|
|
unsigned char *buf)
|
||
|
|
{
|
||
|
|
unsigned long S[8], W[64];
|
||
|
|
int i;
|
||
|
|
/* copy state into S */
|
||
|
|
for(i = 0; i < 8; i++) {
|
||
|
|
S[i] = md->state[i];
|
||
|
|
}
|
||
|
|
/* copy the state into 512-bits into W[0..15] */
|
||
|
|
for(i = 0; i < 16; i++)
|
||
|
|
W[i] = WPA_GET_BE32(buf + (4 * i));
|
||
|
|
/* fill W[16..63] */
|
||
|
|
for(i = 16; i < 64; i++) {
|
||
|
|
W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) +
|
||
|
|
W[i - 16];
|
||
|
|
}
|
||
|
|
/* Compress */
|
||
|
|
#define RND(a,b,c,d,e,f,g,h,i) \
|
||
|
|
unsigned long t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
|
||
|
|
unsigned long t1 = Sigma0(a) + Maj(a, b, c); \
|
||
|
|
d += t0; \
|
||
|
|
h = t0 + t1;
|
||
|
|
for(i = 0; i < 64; ++i) {
|
||
|
|
unsigned long t;
|
||
|
|
RND(S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i);
|
||
|
|
t = S[7]; S[7] = S[6]; S[6] = S[5]; S[5] = S[4];
|
||
|
|
S[4] = S[3]; S[3] = S[2]; S[2] = S[1]; S[1] = S[0]; S[0] = t;
|
||
|
|
}
|
||
|
|
/* feedback */
|
||
|
|
for(i = 0; i < 8; i++) {
|
||
|
|
md->state[i] = md->state[i] + S[i];
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/* Initialize the hash state */
|
||
|
|
static void SHA256_Init(struct sha256_state *md)
|
||
|
|
{
|
||
|
|
md->curlen = 0;
|
||
|
|
md->length = 0;
|
||
|
|
md->state[0] = 0x6A09E667UL;
|
||
|
|
md->state[1] = 0xBB67AE85UL;
|
||
|
|
md->state[2] = 0x3C6EF372UL;
|
||
|
|
md->state[3] = 0xA54FF53AUL;
|
||
|
|
md->state[4] = 0x510E527FUL;
|
||
|
|
md->state[5] = 0x9B05688CUL;
|
||
|
|
md->state[6] = 0x1F83D9ABUL;
|
||
|
|
md->state[7] = 0x5BE0CD19UL;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
Process a block of memory though the hash
|
||
|
|
@param md The hash state
|
||
|
|
@param in The data to hash
|
||
|
|
@param inlen The length of the data (octets)
|
||
|
|
@return CRYPT_OK if successful
|
||
|
|
*/
|
||
|
|
static int SHA256_Update(struct sha256_state *md,
|
||
|
|
const unsigned char *in,
|
||
|
|
unsigned long inlen)
|
||
|
|
{
|
||
|
|
unsigned long n;
|
||
|
|
#define block_size 64
|
||
|
|
if(md->curlen > sizeof(md->buf))
|
||
|
|
return -1;
|
||
|
|
while(inlen > 0) {
|
||
|
|
if(md->curlen == 0 && inlen >= block_size) {
|
||
|
|
if(sha256_compress(md, (unsigned char *)in) < 0)
|
||
|
|
return -1;
|
||
|
|
md->length += block_size * 8;
|
||
|
|
in += block_size;
|
||
|
|
inlen -= block_size;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
n = CURLMIN(inlen, (block_size - md->curlen));
|
||
|
|
memcpy(md->buf + md->curlen, in, n);
|
||
|
|
md->curlen += n;
|
||
|
|
in += n;
|
||
|
|
inlen -= n;
|
||
|
|
if(md->curlen == block_size) {
|
||
|
|
if(sha256_compress(md, md->buf) < 0)
|
||
|
|
return -1;
|
||
|
|
md->length += 8 * block_size;
|
||
|
|
md->curlen = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
Terminate the hash to get the digest
|
||
|
|
@param md The hash state
|
||
|
|
@param out [out] The destination of the hash (32 bytes)
|
||
|
|
@return CRYPT_OK if successful
|
||
|
|
*/
|
||
|
|
static int SHA256_Final(unsigned char *out,
|
||
|
|
struct sha256_state *md)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
if(md->curlen >= sizeof(md->buf))
|
||
|
|
return -1;
|
||
|
|
/* increase the length of the message */
|
||
|
|
md->length += md->curlen * 8;
|
||
|
|
/* append the '1' bit */
|
||
|
|
md->buf[md->curlen++] = (unsigned char)0x80;
|
||
|
|
/* if the length is currently above 56 bytes we append zeros
|
||
|
|
* then compress. Then we can fall back to padding zeros and length
|
||
|
|
* encoding like normal.
|
||
|
|
*/
|
||
|
|
if(md->curlen > 56) {
|
||
|
|
while(md->curlen < 64) {
|
||
|
|
md->buf[md->curlen++] = (unsigned char)0;
|
||
|
|
}
|
||
|
|
sha256_compress(md, md->buf);
|
||
|
|
md->curlen = 0;
|
||
|
|
}
|
||
|
|
/* pad up to 56 bytes of zeroes */
|
||
|
|
while(md->curlen < 56) {
|
||
|
|
md->buf[md->curlen++] = (unsigned char)0;
|
||
|
|
}
|
||
|
|
/* store length */
|
||
|
|
WPA_PUT_BE64(md->buf + 56, md->length);
|
||
|
|
sha256_compress(md, md->buf);
|
||
|
|
/* copy output */
|
||
|
|
for(i = 0; i < 8; i++)
|
||
|
|
WPA_PUT_BE32(out + (4 * i), md->state[i]);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/* ===== end - public domain SHA256 implementation ===== */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void Curl_sha256it(unsigned char *outbuffer, /* 32 unsigned chars */
|
||
|
|
const unsigned char *input)
|
||
|
|
{
|
||
|
|
SHA256_CTX ctx;
|
||
|
|
SHA256_Init(&ctx);
|
||
|
|
SHA256_Update(&ctx, input, curlx_uztoui(strlen((char *)input)));
|
||
|
|
SHA256_Final(outbuffer, &ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CURL_DISABLE_CRYPTO_AUTH */
|