c++ - HMAC_GOST341194 value mismatch -

i'm not sure place right choise kind of issues(it's rather crypto related), there no other hope spot error, unfortunately.

so, here code use compute hmac_gost341194:

hmac hmac; string step1, step2, step3;  ipad.assign(blocksize, 0x36); opad.assign(blocksize, 0x5c);  (size_t = 0ul, e = length; < e; ++i)  {     ipad.replace(i, 1, 1, secret[i] ^ 0x36);     opad.replace(i, 1, 1, secret[i] ^ 0x5c); }  step1 = ipad + text;  hmac.hash(step1, step1.length(), step2);  step3 = opad + step2;  hmac.hash(step3, step3.length(), mac); 

hash function double checked - there no errors , test values equal other sources.

my block size 256.

i use following s-boxes(cryptopro param set):

const unsigned char s[8][16] = {     { 10,   4,  5,  6,  8,  1,  3,  7,  13, 12, 14, 0,  9,  2,  11, 15  },     { 5,    15, 4,  0,  2,  13, 11, 9,  1,  7,  6,  3,  12, 14, 10, 8   },     { 7,    15, 12, 14, 9,  4,  1,  0,  3,  11, 5,  2,  6,  10, 8,  13  },     { 4,    10, 7,  12, 0,  15, 2,  8,  14, 1,  6,  5,  13, 11, 9,  3   },     { 7,    6,  4,  11, 9,  12, 2,  10, 1,  8,  0,  14, 15, 13, 3,  5   },     { 7,    6,  2,  4,  13, 9,  15, 0,  10, 1,  5,  11, 8,  14, 12, 3   },     { 13,   14, 4,  1,  7,  0,  5,  10, 3,  12, 8,  15, 6,  2,  9,  11  },     { 1,    3,  10, 9,  5,  11, 4,  15, 8,  6,  7,  14, 13, 0,  2,  12  }, };  

here have example(the sample found):

k(ascii) = "s=, ehesttgiyga bnss esi2leh3 mt" k(in hex) = 733d2c20 65686573 74746769 79676120 626e7373 20657369 326c6568 33206d54 (32 bytes)  text (ascii) = "this message, length=32 bytes" text (in hex) = 54686973 20697320 6d657373 6167652c 206c656e 6774683d 33322062 79746573  hmac_gostr3411 = 4ff66c94 bddaae61 13360514 2b582b9c 0f38bbdf f3d7f0ee 6a9c935d 92bfa107 

however, value is: c0f2fe71c3ca016356722646308b69453bb4cd1e232231e04beb03db6976f128

any of providing more test data or either reject/verify existing appreciated.

i've found answer question: example incorrect, there bug in code either.

so, assuming

k(ascii) = "s=, ehesttgiyga bnss esi2leh3 mt"  text (ascii) = "this message, length=32 bytes" 

1. ipad || text hash is: e9d755a47f72a558ae5e75f5b141f5b174e7b1fed281436f3fe835d78d0d9f05
2. opad || hash(ipad || text) hash is: 8ff55ddaab167a22de98286f10458a1619bc45c88f6eac9ce947ed3ffb348822

second value hmac_gost341194 itself.

all hashes computed using code , verified using cpverify params cpverify.exe -mk -alg gr3411 "%your_path_to_file%\hash.txt" pause

hope save couple hours of time not research why example hmac computed incorrectly here.

poc available here.