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Fix signature verification cache

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This commit is contained in:
Jeremy Lakeman 2013-09-24 14:22:37 +09:30
parent 9885280334
commit 5383b5e3be
1 changed files with 8 additions and 15 deletions
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23
rhizome_crypto.c
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@ -481,19 +481,12 @@ int rhizome_manifest_lookup_signature_validity(unsigned char *hash,unsigned char
}
slot%=SIG_CACHE_SIZE;
int replace=0;
if (sig_cache[slot].signature_length!=sig_len) replace=1;
for(i=0;i<crypto_hash_sha512_BYTES;i++)
if (hash[i]!=sig_cache[i].manifest_hash[i]) { replace=1; break; }
for(i=0;i<sig_len;i++)
if (sig[i]!=sig_cache[i].signature_bytes[i]) { replace=1; break; }
if (replace) {
for(i=0;i<crypto_hash_sha512_BYTES;i++)
sig_cache[i].manifest_hash[i]=hash[i];
for(i=0;i<sig_len;i++)
sig_cache[i].signature_bytes[i]=sig[i];
sig_cache[i].signature_length=sig_len;
if (sig_cache[slot].signature_length!=sig_len ||
memcmp(hash, sig_cache[slot].manifest_hash, crypto_hash_sha512_BYTES) ||
memcmp(sig, sig_cache[slot].signature_bytes, sig_len)){
bcopy(hash, sig_cache[slot].manifest_hash, crypto_hash_sha512_BYTES);
bcopy(sig, sig_cache[slot].signature_bytes, sig_len);
sig_cache[slot].signature_length=sig_len;
unsigned char sigBuf[256];
unsigned char verifyBuf[256];
@ -508,12 +501,12 @@ int rhizome_manifest_lookup_signature_validity(unsigned char *hash,unsigned char
bcopy(&sig[64],&publicKey[0],crypto_sign_edwards25519sha512batch_PUBLICKEYBYTES);
unsigned long long mlen=0;
sig_cache[i].signature_valid=
sig_cache[slot].signature_valid=
crypto_sign_edwards25519sha512batch_open(verifyBuf,&mlen,&sigBuf[0],128,
publicKey)
? -1 : 0;
}
RETURN(sig_cache[i].signature_valid);
RETURN(sig_cache[slot].signature_valid);
OUT();
}