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asn: refactoring SignCert to reduce stack usage: 512 bytes - pointers size moved to the heap.

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--- variable sig moved to the heap (1152 bytes saved)
This commit is contained in:
Moisés Guimarães 2014-07-04 10:15:39 -03:00
parent 30977adc84
commit 1739aea535
1 changed files with 16 additions and 9 deletions
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21
ctaocrypt/src/asn.c
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@ -5851,21 +5851,28 @@ int MakeCertReq(Cert* cert, byte* derBuffer, word32 derSz,
int SignCert(int requestSz, int sType, byte* buffer, word32 buffSz, int SignCert(int requestSz, int sType, byte* buffer, word32 buffSz,
RsaKey* rsaKey, ecc_key* eccKey, RNG* rng) RsaKey* rsaKey, ecc_key* eccKey, RNG* rng)
{ {
byte sig[MAX_ENCODED_SIG_SZ];
int sigSz; int sigSz;
DECLARE_ARRAY(byte, sig, MAX_ENCODED_SIG_SZ);
if (requestSz < 0) if (requestSz < 0)
return requestSz; return requestSz;
sigSz = MakeSignature(buffer, requestSz, sig, sizeof(sig), rsaKey, eccKey, if (!CREATE_ARRAY(byte, sig, MAX_ENCODED_SIG_SZ))
rng, sType); return MEMORY_E;
if (sigSz < 0)
return sigSz;
sigSz = MakeSignature(buffer, requestSz, sig, MAX_ENCODED_SIG_SZ, rsaKey,
eccKey, rng, sType);
if (sigSz >= 0) {
if (requestSz + MAX_SEQ_SZ * 2 + sigSz > (int)buffSz) if (requestSz + MAX_SEQ_SZ * 2 + sigSz > (int)buffSz)
return BUFFER_E; sigSz = BUFFER_E;
else
sigSz = AddSignature(buffer, requestSz, sig, sigSz, sType);
}
return AddSignature(buffer, requestSz, sig, sigSz, sType); DESTROY_ARRAY(sig);
return sigSz;
} }