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crypt32: Zero-pad RSA Private Key values as needed to fit PRIVATEKEYBLOB. 

Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Vincent Povirk 2015-10-12 16:05:50 -05:00 committed by Alexandre Julliard
parent 59ba888e67
commit 8327b063bc
1 changed files with 21 additions and 19 deletions
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40
dlls/crypt32/decode.c
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@ -4002,18 +4002,19 @@ static BOOL WINAPI CRYPT_AsnDecodeRsaPrivKey(DWORD dwCertEncodingType,
&size, NULL, NULL);
if (ret)
{
halflen = decodedKey->modulus.cbData / 2;
if ((decodedKey->modulus.cbData != halflen * 2) ||
(decodedKey->prime1.cbData != halflen) ||
(decodedKey->prime2.cbData != halflen) ||
(decodedKey->exponent1.cbData != halflen) ||
(decodedKey->exponent2.cbData != halflen) ||
(decodedKey->coefficient.cbData != halflen) ||
(decodedKey->privexp.cbData != halflen * 2))
{
ret = FALSE;
SetLastError(CRYPT_E_BAD_ENCODE);
}
halflen = decodedKey->prime1.cbData;
if (halflen < decodedKey->prime2.cbData)
halflen = decodedKey->prime2.cbData;
if (halflen < decodedKey->exponent1.cbData)
halflen = decodedKey->exponent1.cbData;
if (halflen < decodedKey->exponent2.cbData)
halflen = decodedKey->exponent2.cbData;
if (halflen < decodedKey->coefficient.cbData)
halflen = decodedKey->coefficient.cbData;
if (halflen * 2 < decodedKey->modulus.cbData)
halflen = decodedKey->modulus.cbData / 2 + decodedKey->modulus.cbData % 2;
if (halflen * 2 < decodedKey->privexp.cbData)
halflen = decodedKey->privexp.cbData / 2 + decodedKey->privexp.cbData % 2;
if (ret)
{
@ -4048,20 +4049,21 @@ static BOOL WINAPI CRYPT_AsnDecodeRsaPrivKey(DWORD dwCertEncodingType,
rsaPubKey->bitlen = halflen * 16;
vardata = (BYTE*)(rsaPubKey + 1);
memset(vardata, 0, halflen * 9);
memcpy(vardata,
decodedKey->modulus.pbData, halflen * 2);
decodedKey->modulus.pbData, decodedKey->modulus.cbData);
memcpy(vardata + halflen * 2,
decodedKey->prime1.pbData, halflen);
decodedKey->prime1.pbData, decodedKey->prime1.cbData);
memcpy(vardata + halflen * 3,
decodedKey->prime2.pbData, halflen);
decodedKey->prime2.pbData, decodedKey->prime2.cbData);
memcpy(vardata + halflen * 4,
decodedKey->exponent1.pbData, halflen);
decodedKey->exponent1.pbData, decodedKey->exponent1.cbData);
memcpy(vardata + halflen * 5,
decodedKey->exponent2.pbData, halflen);
decodedKey->exponent2.pbData, decodedKey->exponent2.cbData);
memcpy(vardata + halflen * 6,
decodedKey->coefficient.pbData, halflen);
decodedKey->coefficient.pbData, decodedKey->coefficient.cbData);
memcpy(vardata + halflen * 7,
decodedKey->privexp.pbData, halflen * 2);
decodedKey->privexp.pbData, decodedKey->privexp.cbData);
}
}