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Nist P-384 guts and glory

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This commit is contained in:
Adam Ierymenko 2019-07-16 16:09:14 -05:00
parent debd5a5c5e
commit 94ba242c33
8 changed files with 1557 additions and 31 deletions
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17
node/C25519.cpp
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@ -2687,7 +2687,7 @@ void ge25519_scalarmult_base(ge25519_p3 *r, const sc25519 *s)
}
}
void get_hram(unsigned char *hram, const unsigned char *sm, const unsigned char *pk, unsigned char *playground, unsigned long long smlen)
void get_hram(unsigned char *hram, const unsigned char *sm, const unsigned char *pk, unsigned char *playground, unsigned long smlen)
{
unsigned long long i;
@ -2778,13 +2778,22 @@ void C25519::sign(const C25519::Private &myPrivate,const C25519::Public &myPubli
#endif
}
bool C25519::verify(const C25519::Public &their,const void *msg,unsigned int len,const void *signature)
bool C25519::verify(const C25519::Public &their,const void *msg,unsigned int len,const void *signature,const unsigned int siglen)
{
const unsigned char *const sig = (const unsigned char *)signature;
if (siglen < 64) return false;
const unsigned char *sig = (const unsigned char *)signature;
unsigned char digest[64]; // we sign the first 32 bytes of SHA-512(msg)
unsigned char sigtmp[96];
SHA512::hash(digest,msg,len);
if (!Utils::secureEq(sig + 64,digest,32))
if ((siglen == 96)&&(!Utils::secureEq(sig+64,digest,32))) {
return false;
} else if (siglen == 64) {
memcpy(sigtmp,sig,64);
memcpy(sigtmp+64,digest,32);
sig = sigtmp;
}
unsigned char t2[32];
ge25519 get1, get2;