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crypto/secp256k1: rename output variables in DecompressPubkey

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This commit is contained in:
Felix Lange 2017-12-07 13:15:01 +01:00
parent e34dea192c
commit 689c7d630a
1 changed files with 4 additions and 4 deletions
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8
crypto/secp256k1/secp256.go
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@ -135,17 +135,17 @@ func VerifySignature(pubkey, msg, signature []byte) bool {
// DecompressPubkey parses a public key in the 33-byte compressed format. // DecompressPubkey parses a public key in the 33-byte compressed format.
// It returns non-nil coordinates if the public key is valid. // It returns non-nil coordinates if the public key is valid.
func DecompressPubkey(pubkey []byte) (X, Y *big.Int) { func DecompressPubkey(pubkey []byte) (x, y *big.Int) {
if len(pubkey) != 33 { if len(pubkey) != 33 {
return nil, nil return nil, nil
} }
buf := make([]byte, 65) out := make([]byte, 65)
bufdata := (*C.uchar)(unsafe.Pointer(&buf[0])) outdata := (*C.uchar)(unsafe.Pointer(&out[0]))
pubkeydata := (*C.uchar)(unsafe.Pointer(&pubkey[0])) pubkeydata := (*C.uchar)(unsafe.Pointer(&pubkey[0]))
if C.secp256k1_ext_decompress_pubkey(context, outdata, pubkeydata) == 0 { if C.secp256k1_ext_decompress_pubkey(context, outdata, pubkeydata) == 0 {
return nil, nil return nil, nil
} }
return new(big.Int).SetBytes(buf[1:33]), new(big.Int).SetBytes(buf[33:]) return new(big.Int).SetBytes(out[1:33]), new(big.Int).SetBytes(out[33:])
} }
func checkSignature(sig []byte) error { func checkSignature(sig []byte) error {