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ecdsa: always enforce types in ecdsa

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This commit is contained in:
Daniel Cousens 2015-06-23 15:32:26 +10:00
parent b5ff9db8fd
commit 73d8128f0f
1 changed files with 18 additions and 0 deletions
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18
src/ecdsa.js
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@ -75,6 +75,10 @@ function deterministicGenerateK (curve, hash, d, checkSig) {
}
function sign (curve, hash, d) {
typeForce('Curve', curve)
typeForce('Buffer', hash)
typeForce('BigInteger', d)
var e = BigInteger.fromBuffer(hash)
var n = curve.n
var G = curve.G
@ -105,6 +109,11 @@ function sign (curve, hash, d) {
}
function verify (curve, hash, signature, Q) {
typeForce('Curve', curve)
typeForce('Buffer', hash)
typeForce('ECSignature', signature)
typeForce('Point', Q)
var n = curve.n
var G = curve.G
@ -153,6 +162,10 @@ function verify (curve, hash, signature, Q) {
* http://www.secg.org/download/aid-780/sec1-v2.pdf
*/
function recoverPubKey (curve, e, signature, i) {
typeForce('Curve', curve)
typeForce('BigInteger', e)
typeForce('ECSignature', signature)
typeForce('Number', i)
assert.strictEqual(i & 3, i, 'Recovery param is more than two bits')
var n = curve.n
@ -206,6 +219,11 @@ function recoverPubKey (curve, e, signature, i) {
* that resulted in a successful pubkey recovery.
*/
function calcPubKeyRecoveryParam (curve, e, signature, Q) {
typeForce('Curve', curve)
typeForce('BigInteger', e)
typeForce('ECSignature', signature)
typeForce('Point', Q)
for (var i = 0; i < 4; i++) {
var Qprime = recoverPubKey(curve, e, signature, i)