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ucloud-iot-rtthread-package/uiot/utils/utils_md5.c

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/*
* Copyright (C) 2012-2019 UCloud. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "utils_md5.h"
#include <stdlib.h>
#include <string.h>
#define MD5_DIGEST_SIZE 16
/* Implementation that should never be optimized out by the compiler */
static void _utils_md5_zeroize(void *v, size_t n)
{
volatile unsigned char *p = v;
while (n--) *p++ = 0;
}
/*
* 32-bit integer manipulation macros (little endian)
*/
#ifndef IOT_MD5_GET_UINT32_LE
#define IOT_MD5_GET_UINT32_LE(n,b,i) \
{ \
(n) = ( (uint32_t) (b)[(i) ] ) \
| ( (uint32_t) (b)[(i) + 1] << 8 ) \
| ( (uint32_t) (b)[(i) + 2] << 16 ) \
| ( (uint32_t) (b)[(i) + 3] << 24 ); \
}
#endif
#ifndef IOT_MD5_PUT_UINT32_LE
#define IOT_MD5_PUT_UINT32_LE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( ( (n) ) & 0xFF ); \
(b)[(i) + 1] = (unsigned char) ( ( (n) >> 8 ) & 0xFF ); \
(b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF ); \
(b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF ); \
}
#endif
void utils_md5_init(iot_md5_context *ctx)
{
memset(ctx, 0, sizeof(iot_md5_context));
}
void utils_md5_free(iot_md5_context *ctx)
{
if (ctx == NULL) {
return;
}
_utils_md5_zeroize(ctx, sizeof(iot_md5_context));
}
void utils_md5_clone(iot_md5_context *dst,
const iot_md5_context *src)
{
*dst = *src;
}
/*
* MD5 context setup
*/
void utils_md5_starts(iot_md5_context *ctx)
{
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0x67452301;
ctx->state[1] = 0xEFCDAB89;
ctx->state[2] = 0x98BADCFE;
ctx->state[3] = 0x10325476;
}
void utils_md5_process(iot_md5_context *ctx, const unsigned char data[64])
{
uint32_t X[16], A, B, C, D;
IOT_MD5_GET_UINT32_LE(X[ 0], data, 0);
IOT_MD5_GET_UINT32_LE(X[ 1], data, 4);
IOT_MD5_GET_UINT32_LE(X[ 2], data, 8);
IOT_MD5_GET_UINT32_LE(X[ 3], data, 12);
IOT_MD5_GET_UINT32_LE(X[ 4], data, 16);
IOT_MD5_GET_UINT32_LE(X[ 5], data, 20);
IOT_MD5_GET_UINT32_LE(X[ 6], data, 24);
IOT_MD5_GET_UINT32_LE(X[ 7], data, 28);
IOT_MD5_GET_UINT32_LE(X[ 8], data, 32);
IOT_MD5_GET_UINT32_LE(X[ 9], data, 36);
IOT_MD5_GET_UINT32_LE(X[10], data, 40);
IOT_MD5_GET_UINT32_LE(X[11], data, 44);
IOT_MD5_GET_UINT32_LE(X[12], data, 48);
IOT_MD5_GET_UINT32_LE(X[13], data, 52);
IOT_MD5_GET_UINT32_LE(X[14], data, 56);
IOT_MD5_GET_UINT32_LE(X[15], data, 60);
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
#define P(a,b,c,d,k,s,t) \
{ \
a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
#define F(x,y,z) (z ^ (x & (y ^ z)))
P(A, B, C, D, 0, 7, 0xD76AA478);
P(D, A, B, C, 1, 12, 0xE8C7B756);
P(C, D, A, B, 2, 17, 0x242070DB);
P(B, C, D, A, 3, 22, 0xC1BDCEEE);
P(A, B, C, D, 4, 7, 0xF57C0FAF);
P(D, A, B, C, 5, 12, 0x4787C62A);
P(C, D, A, B, 6, 17, 0xA8304613);
P(B, C, D, A, 7, 22, 0xFD469501);
P(A, B, C, D, 8, 7, 0x698098D8);
P(D, A, B, C, 9, 12, 0x8B44F7AF);
P(C, D, A, B, 10, 17, 0xFFFF5BB1);
P(B, C, D, A, 11, 22, 0x895CD7BE);
P(A, B, C, D, 12, 7, 0x6B901122);
P(D, A, B, C, 13, 12, 0xFD987193);
P(C, D, A, B, 14, 17, 0xA679438E);
P(B, C, D, A, 15, 22, 0x49B40821);
#undef F
#define F(x,y,z) (y ^ (z & (x ^ y)))
P(A, B, C, D, 1, 5, 0xF61E2562);
P(D, A, B, C, 6, 9, 0xC040B340);
P(C, D, A, B, 11, 14, 0x265E5A51);
P(B, C, D, A, 0, 20, 0xE9B6C7AA);
P(A, B, C, D, 5, 5, 0xD62F105D);
P(D, A, B, C, 10, 9, 0x02441453);
P(C, D, A, B, 15, 14, 0xD8A1E681);
P(B, C, D, A, 4, 20, 0xE7D3FBC8);
P(A, B, C, D, 9, 5, 0x21E1CDE6);
P(D, A, B, C, 14, 9, 0xC33707D6);
P(C, D, A, B, 3, 14, 0xF4D50D87);
P(B, C, D, A, 8, 20, 0x455A14ED);
P(A, B, C, D, 13, 5, 0xA9E3E905);
P(D, A, B, C, 2, 9, 0xFCEFA3F8);
P(C, D, A, B, 7, 14, 0x676F02D9);
P(B, C, D, A, 12, 20, 0x8D2A4C8A);
#undef F
#define F(x,y,z) (x ^ y ^ z)
P(A, B, C, D, 5, 4, 0xFFFA3942);
P(D, A, B, C, 8, 11, 0x8771F681);
P(C, D, A, B, 11, 16, 0x6D9D6122);
P(B, C, D, A, 14, 23, 0xFDE5380C);
P(A, B, C, D, 1, 4, 0xA4BEEA44);
P(D, A, B, C, 4, 11, 0x4BDECFA9);
P(C, D, A, B, 7, 16, 0xF6BB4B60);
P(B, C, D, A, 10, 23, 0xBEBFBC70);
P(A, B, C, D, 13, 4, 0x289B7EC6);
P(D, A, B, C, 0, 11, 0xEAA127FA);
P(C, D, A, B, 3, 16, 0xD4EF3085);
P(B, C, D, A, 6, 23, 0x04881D05);
P(A, B, C, D, 9, 4, 0xD9D4D039);
P(D, A, B, C, 12, 11, 0xE6DB99E5);
P(C, D, A, B, 15, 16, 0x1FA27CF8);
P(B, C, D, A, 2, 23, 0xC4AC5665);
#undef F
#define F(x,y,z) (y ^ (x | ~z))
P(A, B, C, D, 0, 6, 0xF4292244);
P(D, A, B, C, 7, 10, 0x432AFF97);
P(C, D, A, B, 14, 15, 0xAB9423A7);
P(B, C, D, A, 5, 21, 0xFC93A039);
P(A, B, C, D, 12, 6, 0x655B59C3);
P(D, A, B, C, 3, 10, 0x8F0CCC92);
P(C, D, A, B, 10, 15, 0xFFEFF47D);
P(B, C, D, A, 1, 21, 0x85845DD1);
P(A, B, C, D, 8, 6, 0x6FA87E4F);
P(D, A, B, C, 15, 10, 0xFE2CE6E0);
P(C, D, A, B, 6, 15, 0xA3014314);
P(B, C, D, A, 13, 21, 0x4E0811A1);
P(A, B, C, D, 4, 6, 0xF7537E82);
P(D, A, B, C, 11, 10, 0xBD3AF235);
P(C, D, A, B, 2, 15, 0x2AD7D2BB);
P(B, C, D, A, 9, 21, 0xEB86D391);
#undef F
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
}
/*
* MD5 process buffer
*/
void utils_md5_update(iot_md5_context *ctx, const unsigned char *input, size_t ilen)
{
size_t fill;
uint32_t left;
if (ilen == 0) {
return;
}
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += (uint32_t) ilen;
ctx->total[0] &= 0xFFFFFFFF;
if (ctx->total[0] < (uint32_t) ilen) {
ctx->total[1]++;
}
if (left && ilen >= fill) {
memcpy((void *)(ctx->buffer + left), input, fill);
utils_md5_process(ctx, ctx->buffer);
input += fill;
ilen -= fill;
left = 0;
}
while (ilen >= 64) {
utils_md5_process(ctx, input);
input += 64;
ilen -= 64;
}
if (ilen > 0) {
memcpy((void *)(ctx->buffer + left), input, ilen);
}
}
static const unsigned char iot_md5_padding[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/*
* MD5 final digest
*/
void utils_md5_finish(iot_md5_context *ctx, unsigned char output[16])
{
uint32_t last, padn;
uint32_t high, low;
unsigned char msglen[8];
high = (ctx->total[0] >> 29)
| (ctx->total[1] << 3);
low = (ctx->total[0] << 3);
IOT_MD5_PUT_UINT32_LE(low, msglen, 0);
IOT_MD5_PUT_UINT32_LE(high, msglen, 4);
last = ctx->total[0] & 0x3F;
padn = (last < 56) ? (56 - last) : (120 - last);
utils_md5_update(ctx, iot_md5_padding, padn);
utils_md5_update(ctx, msglen, 8);
IOT_MD5_PUT_UINT32_LE(ctx->state[0], output, 0);
IOT_MD5_PUT_UINT32_LE(ctx->state[1], output, 4);
IOT_MD5_PUT_UINT32_LE(ctx->state[2], output, 8);
IOT_MD5_PUT_UINT32_LE(ctx->state[3], output, 12);
}
/*
* output = MD5( input buffer )
*/
void utils_md5(const unsigned char *input, size_t ilen, unsigned char output[16])
{
iot_md5_context ctx;
utils_md5_init(&ctx);
utils_md5_starts(&ctx);
utils_md5_update(&ctx, input, ilen);
utils_md5_finish(&ctx, output);
utils_md5_free(&ctx);
}
int8_t utils_hb2hex(uint8_t hb)
{
hb = hb & 0xF;
return (int8_t)(hb < 10 ? '0' + hb : hb - 10 + 'a');
}
void utils_md5_finish_hb2hex(void *md5, char *output_str)
{
int i;
unsigned char buf_out[16];
utils_md5_finish(md5, buf_out);
for (i = 0; i < 16; ++i) {
output_str[i * 2] = utils_hb2hex(buf_out[i] >> 4);
output_str[i * 2 + 1] = utils_hb2hex(buf_out[i]);
}
output_str[32] = '\0';
}
#ifdef __cplusplus
}
#endif
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