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SHA256, SHA384 and SHA512 error propagation. Major impact on Hmac functions with error propagation.

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Moisés Guimarães
2014-04-14 10:36:17 -03:00
parent 644bb9c524
commit 32e2d7016f
8 changed files with 303 additions and 105 deletions
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23
ctaocrypt/src/pwdbased.c
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@@ -151,21 +151,34 @@ int PBKDF2(byte* output, const byte* passwd, int pLen, const byte* salt,
while (kLen) {
int currentLen;
HmacUpdate(&hmac, salt, sLen);
ret = HmacUpdate(&hmac, salt, sLen);
if (ret != 0)
return ret;
/* encode i */
for (j = 0; j < 4; j++) {
byte b = (byte)(i >> ((3-j) * 8));
HmacUpdate(&hmac, &b, 1);
ret = HmacUpdate(&hmac, &b, 1);
if (ret != 0)
return ret;
}
HmacFinal(&hmac, buffer);
ret = HmacFinal(&hmac, buffer);
if (ret != 0)
return ret;
currentLen = min(kLen, hLen);
XMEMCPY(output, buffer, currentLen);
for (j = 1; j < iterations; j++) {
HmacUpdate(&hmac, buffer, hLen);
HmacFinal(&hmac, buffer);
ret = HmacUpdate(&hmac, buffer, hLen);
if (ret != 0)
return ret;
ret = HmacFinal(&hmac, buffer);
if (ret != 0)
return ret;
xorbuf(output, buffer, currentLen);
}