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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package note_test
import (
"fmt"
"io"
"os"
"golang.org/x/exp/sumdb/internal/note"
)
func ExampleSign() {
skey := "PRIVATE+KEY+PeterNeumann+c74f20a3+AYEKFALVFGyNhPJEMzD1QIDr+Y7hfZx09iUvxdXHKDFz"
text := "If you think cryptography is the answer to your problem,\n" +
"then you don't know what your problem is.\n"
signer, err := note.NewSigner(skey)
if err != nil {
fmt.Println(err)
return
}
msg, err := note.Sign(¬e.Note{Text: text}, signer)
if err != nil {
fmt.Println(err)
return
}
os.Stdout.Write(msg)
// Output:
// If you think cryptography is the answer to your problem,
// then you don't know what your problem is.
//
// — PeterNeumann x08go/ZJkuBS9UG/SffcvIAQxVBtiFupLLr8pAcElZInNIuGUgYN1FFYC2pZSNXgKvqfqdngotpRZb6KE6RyyBwJnAM=
}
func ExampleOpen() {
vkey := "PeterNeumann+c74f20a3+ARpc2QcUPDhMQegwxbzhKqiBfsVkmqq/LDE4izWy10TW"
msg := []byte("If you think cryptography is the answer to your problem,\n" +
"then you don't know what your problem is.\n" +
"\n" +
"— PeterNeumann x08go/ZJkuBS9UG/SffcvIAQxVBtiFupLLr8pAcElZInNIuGUgYN1FFYC2pZSNXgKvqfqdngotpRZb6KE6RyyBwJnAM=\n")
verifier, err := note.NewVerifier(vkey)
if err != nil {
fmt.Println(err)
return
}
verifiers := note.VerifierList(verifier)
n, err := note.Open(msg, verifiers)
if err != nil {
fmt.Println(err)
return
}
fmt.Printf("%s (%08x):\n%s", n.Sigs[0].Name, n.Sigs[0].Hash, n.Text)
// Output:
// PeterNeumann (c74f20a3):
// If you think cryptography is the answer to your problem,
// then you don't know what your problem is.
}
var rand = struct {
Reader io.Reader
}{
zeroReader{},
}
type zeroReader struct{}
func (zeroReader) Read(buf []byte) (int, error) {
for i := range buf {
buf[i] = 0
}
return len(buf), nil
}
func ExampleSign_add_signatures() {
vkey := "PeterNeumann+c74f20a3+ARpc2QcUPDhMQegwxbzhKqiBfsVkmqq/LDE4izWy10TW"
msg := []byte("If you think cryptography is the answer to your problem,\n" +
"then you don't know what your problem is.\n" +
"\n" +
"— PeterNeumann x08go/ZJkuBS9UG/SffcvIAQxVBtiFupLLr8pAcElZInNIuGUgYN1FFYC2pZSNXgKvqfqdngotpRZb6KE6RyyBwJnAM=\n")
verifier, err := note.NewVerifier(vkey)
if err != nil {
fmt.Println(err)
return
}
verifiers := note.VerifierList(verifier)
n, err := note.Open([]byte(msg), verifiers)
if err != nil {
fmt.Println(err)
return
}
skey, vkey, err := note.GenerateKey(rand.Reader, "EnochRoot")
if err != nil {
fmt.Println(err)
return
}
_ = vkey // give to verifiers
me, err := note.NewSigner(skey)
if err != nil {
fmt.Println(err)
return
}
msg, err = note.Sign(n, me)
if err != nil {
fmt.Println(err)
return
}
os.Stdout.Write(msg)
// Output:
// If you think cryptography is the answer to your problem,
// then you don't know what your problem is.
//
// — PeterNeumann x08go/ZJkuBS9UG/SffcvIAQxVBtiFupLLr8pAcElZInNIuGUgYN1FFYC2pZSNXgKvqfqdngotpRZb6KE6RyyBwJnAM=
// — EnochRoot rwz+eBzmZa0SO3NbfRGzPCpDckykFXSdeX+MNtCOXm2/5n2tiOHp+vAF1aGrQ5ovTG01oOTGwnWLox33WWd1RvMc+QQ=
}
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