/* * Tencent is pleased to support the open source community by making IoT Hub available. * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved. * Licensed under the MIT License (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://opensource.org/licenses/MIT * Unless required by applicable law or agreed to in writing, software distributed under the License 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 #include #include "qcloud_iot_export.h" #include "qcloud_iot_import.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_str(const unsigned char *input, size_t ilen, unsigned char *output) { int i; unsigned char buf_out[16]; utils_md5(input, ilen, buf_out); //hex to string for (i = 0; i < 16; ++i) { output[i * 2] = utils_hb2hex(buf_out[i] >> 4); output[i * 2 + 1] = utils_hb2hex(buf_out[i]); } output[32] = '\0'; } #ifdef __cplusplus } #endif