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| author | obscuren <geffobscura@gmail.com> | 2015-01-23 01:12:05 +0800 |
|---|---|---|
| committer | obscuren <geffobscura@gmail.com> | 2015-01-23 01:12:05 +0800 |
| commit | d4cc2d3503ce7497ef0cb39456a332b25e0999b9 (patch) | |
| tree | 7eefc6366630a571eeaf724d4be5972cc7e06302 /crypto/crypto.go | |
| parent | b777d6aa3f0e771ca8465924820db1848bc47402 (diff) | |
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Pad private key when signing & length check for hashes in sign
Diffstat (limited to 'crypto/crypto.go')
| -rw-r--r-- | crypto/crypto.go | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/crypto/crypto.go b/crypto/crypto.go index ac84c6204..3da69ea94 100644 --- a/crypto/crypto.go +++ b/crypto/crypto.go @@ -5,6 +5,7 @@ import ( "crypto/elliptic" "crypto/rand" "crypto/sha256" + "fmt" "code.google.com/p/go.crypto/ripemd160" "github.com/ethereum/go-ethereum/crypto/secp256k1" @@ -101,7 +102,11 @@ func SigToPub(hash, sig []byte) *ecdsa.PublicKey { } func Sign(hash []byte, prv *ecdsa.PrivateKey) (sig []byte, err error) { - sig, err = secp256k1.Sign(hash, prv.D.Bytes()) + if len(hash) != 32 { + return nil, fmt.Errorf("hash is required to be exactly 32 bytes (%d)", len(hash)) + } + + sig, err = secp256k1.Sign(hash, ethutil.LeftPadBytes(prv.D.Bytes(), 32)) return } |