Which method is used in Go's btcec library to verify secp256k1 signatures?

php editor Xiaoxin used the ECDSA algorithm in the btcec library to verify the secp256k1 signature. ECDSA (Elliptic Curve Digital Signature Algorithm) is a digital signature algorithm based on elliptic curve cryptography, which ensures the integrity and authenticity of data by verifying the signature. In the btcec library, the signature is verified by using the secp256k1 curve parameters and the public key to ensure the validity of the signature. This method not only ensures security, but also has high efficiency and performance.

Question content

I am using the btcec library to handle secp256k1 signatures in Go. However, I did not find a clear method of verifying signatures in the official documents. btcec There is a link to a "Verify Signature" example in the documentation, but the example code doesn't seem to be provided directly.

I want to know, which method in btcec library is used to verify secp256k1 signature? It would be great if someone could provide a simple code example. Thanks!

Solution

Here you go;-)

https://github.com/btcsuite/btcd /blob/master/btcec/ecdsa/example_test.go

// This example demonstrates verifying a secp256k1 signature against a public
// key that is first parsed from raw bytes.  The signature is also parsed from
// raw bytes.
func Example_verifySignature() {
    // Decode hex-encoded serialized public key.
    pubKeyBytes, err := hex.DecodeString("02a673638cb9587cb68ea08dbef685c" +
        "6f2d2a751a8b3c6f2a7e9a4999e6e4bfaf5")
    if err != nil {
        fmt.Println(err)
        return
    }
    pubKey, err := btcec.ParsePubKey(pubKeyBytes)
    if err != nil {
        fmt.Println(err)
        return
    }

    // Decode hex-encoded serialized signature.
    sigBytes, err := hex.DecodeString("30450220090ebfb3690a0ff115bb1b38b" +
        "8b323a667b7653454f1bccb06d4bbdca42c2079022100ec95778b51e707" +
        "1cb1205f8bde9af6592fc978b0452dafe599481c46d6b2e479")

    if err != nil {
        fmt.Println(err)
        return
    }
    signature, err := ecdsa.ParseSignature(sigBytes)
    if err != nil {
        fmt.Println(err)
        return
    }

    // Verify the signature for the message using the public key.
    message := "test message"
    messageHash := chainhash.DoubleHashB([]byte(message))
    verified := signature.Verify(messageHash, pubKey)
    fmt.Println("Signature Verified?", verified)

    // Output:
    // Signature Verified? true
}

The above is the detailed content of Which method is used in Go's btcec library to verify secp256k1 signatures?. For more information, please follow other related articles on the PHP Chinese website!