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35 lines
717 B
Go
35 lines
717 B
Go
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build gccgo_examples
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package ecdsa_test
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/sha256"
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"fmt"
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)
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func Example() {
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privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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panic(err)
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}
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msg := "hello, world"
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hash := sha256.Sum256([]byte(msg))
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r, s, err := ecdsa.Sign(rand.Reader, privateKey, hash[:])
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if err != nil {
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panic(err)
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}
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fmt.Printf("signature: (0x%x, 0x%x)\n", r, s)
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valid := ecdsa.Verify(&privateKey.PublicKey, hash[:], r, s)
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fmt.Println("signature verified:", valid)
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}
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