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support hybrid keys. see indutny/elliptic#91.

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This commit is contained in:
Christopher Jeffrey 2016-05-25 02:42:33 -07:00
parent 2738a4ed5d
commit 77d7916f1e
No known key found for this signature in database
GPG Key ID: 8962AB9DE6666BBD
1 changed files with 36 additions and 16 deletions
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52
lib/bcoin/ec.js
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@ -120,6 +120,8 @@ ec.rand = function rand(min, max) {
*/
ec.verify = function verify(msg, sig, key, historical, high) {
var hybrid, result;
if (key.getPublicKey)
key = key.getPublicKey();
@ -140,28 +142,46 @@ ec.verify = function verify(msg, sig, key, historical, high) {
if (historical)
sig = ec.normalizeLength(sig);
try {
if (secp256k1) {
// secp256k1 fails on high s values. This is
// bad for verifying historical data.
if (high)
sig = ec.toLowS(sig);
if (secp256k1) {
// secp256k1 fails on high s values. This is
// bad for verifying historical data.
if (high)
sig = ec.toLowS(sig);
try {
// Import from DER.
sig = secp256k1.signatureImport(sig);
return secp256k1.verify(msg, sig, key);
result = secp256k1.verify(msg, sig, key);
} catch (e) {
result = false;
}
// Make elliptic mimic secp256k1's
// failure with high S values.
if (!high && !ec.isLowS(sig))
return false;
return ec.elliptic.verify(msg, sig, key);
} catch (e) {
return false;
return result;
}
// Make elliptic mimic secp256k1's
// failure with high S values.
if (!high && !ec.isLowS(sig))
return false;
// Elliptic does not support
// openssl's "hybrid" keys yet.
if (key[0] === 0x06 || key[0] === 0x07) {
hybrid = key[0];
key[0] = 0x04;
}
try {
result = ec.elliptic.verify(msg, sig, key);
} catch (e) {
result = false;
}
// Reset the byte if we need to.
if (hybrid != null)
key[0] = hybrid;
return result;
};
/**