28 lines
774 B
Go
28 lines
774 B
Go
//go:build libsecp256k1_sdk
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// +build libsecp256k1_sdk
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package secp256k1
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import (
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"github.com/tendermint/tendermint/crypto"
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"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1/internal/secp256k1"
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)
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// Sign creates an ECDSA signature on curve Secp256k1, using SHA256 on the msg.
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func (privKey *PrivKey) Sign(msg []byte) ([]byte, error) {
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rsv, err := secp256k1.Sign(crypto.Sha256(msg), privKey.Key)
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if err != nil {
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return nil, err
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}
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// we do not need v in r||s||v:
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rs := rsv[:len(rsv)-1]
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return rs, nil
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}
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// VerifySignature validates the signature.
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// The msg will be hashed prior to signature verification.
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func (pubKey *PubKey) VerifySignature(msg []byte, sigStr []byte) bool {
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return secp256k1.VerifySignature(pubKey.Bytes(), crypto.Sha256(msg), sigStr)
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}
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