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rsaenh: Explicitly clear unused memory when exporting a private key.

This commit is contained in:
Juan Lang 2009-11-05 09:49:00 -08:00 committed by Alexandre Julliard
parent de00535c13
commit 49c11910d8
1 changed files with 21 additions and 0 deletions
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21
dlls/rsaenh/implglue.c
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@ -397,24 +397,45 @@ BOOL export_private_key_impl(BYTE *pbDest, const KEY_CONTEXT *pKeyContext, DWORD
{
mp_to_unsigned_bin(&pKeyContext->rsa.N, pbDest);
reverse_bytes(pbDest, dwKeyLen);
if (mp_unsigned_bin_size(&pKeyContext->rsa.N) < dwKeyLen)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.N), 0,
dwKeyLen - mp_unsigned_bin_size(&pKeyContext->rsa.N));
pbDest += dwKeyLen;
mp_to_unsigned_bin(&pKeyContext->rsa.p, pbDest);
reverse_bytes(pbDest, (dwKeyLen+1)>>1);
if (mp_unsigned_bin_size(&pKeyContext->rsa.p) < (dwKeyLen+1)>>1)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.p), 0,
((dwKeyLen+1)>>1) - mp_unsigned_bin_size(&pKeyContext->rsa.p));
pbDest += (dwKeyLen+1)>>1;
mp_to_unsigned_bin(&pKeyContext->rsa.q, pbDest);
reverse_bytes(pbDest, (dwKeyLen+1)>>1);
if (mp_unsigned_bin_size(&pKeyContext->rsa.q) < (dwKeyLen+1)>>1)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.q), 0,
((dwKeyLen+1)>>1) - mp_unsigned_bin_size(&pKeyContext->rsa.q));
pbDest += (dwKeyLen+1)>>1;
mp_to_unsigned_bin(&pKeyContext->rsa.dP, pbDest);
reverse_bytes(pbDest, (dwKeyLen+1)>>1);
if (mp_unsigned_bin_size(&pKeyContext->rsa.dP) < (dwKeyLen+1)>>1)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.dP), 0,
((dwKeyLen+1)>>1) - mp_unsigned_bin_size(&pKeyContext->rsa.dP));
pbDest += (dwKeyLen+1)>>1;
mp_to_unsigned_bin(&pKeyContext->rsa.dQ, pbDest);
reverse_bytes(pbDest, (dwKeyLen+1)>>1);
if (mp_unsigned_bin_size(&pKeyContext->rsa.dQ) < (dwKeyLen+1)>>1)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.dQ), 0,
((dwKeyLen+1)>>1) - mp_unsigned_bin_size(&pKeyContext->rsa.dQ));
pbDest += (dwKeyLen+1)>>1;
mp_to_unsigned_bin(&pKeyContext->rsa.qP, pbDest);
reverse_bytes(pbDest, (dwKeyLen+1)>>1);
if (mp_unsigned_bin_size(&pKeyContext->rsa.qP) < (dwKeyLen+1)>>1)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.qP), 0,
((dwKeyLen+1)>>1) - mp_unsigned_bin_size(&pKeyContext->rsa.qP));
pbDest += (dwKeyLen+1)>>1;
mp_to_unsigned_bin(&pKeyContext->rsa.d, pbDest);
reverse_bytes(pbDest, dwKeyLen);
if (mp_unsigned_bin_size(&pKeyContext->rsa.d) < dwKeyLen)
memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.d), 0,
dwKeyLen - mp_unsigned_bin_size(&pKeyContext->rsa.d));
*pdwPubExp = (DWORD)mp_get_int(&pKeyContext->rsa.e);
return TRUE;