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// Copyright (c) 2021 Andreas Auernhammer. All rights reserved.
// Use of this source code is governed by a license that can be
// found in the LICENSE file.
package minisign_test
import (
"crypto/rand"
"fmt"
"io"
"strconv"
"strings"
"aead.dev/minisign"
)
func ExampleGenerateKey() {
// Generate a new minisign private / public key pair.
publicKey, privateKey, err := minisign.GenerateKey(rand.Reader)
if err != nil {
panic(err) // TODO: error handling
}
// Sign a message with the private key
message := []byte("Hello Gopher!")
signature := minisign.Sign(privateKey, message)
// Verify the signature with the public key and
// print the message if the signature is valid.
if minisign.Verify(publicKey, message, signature) {
fmt.Println(string(message))
}
// Output: Hello Gopher!
}
func ExampleEncryptKey() {
// Generate a new minisign private / public key pair.
// We don't care about the public key in this example.
_, privateKey, err := minisign.GenerateKey(rand.Reader)
if err != nil {
panic(err) // TODO: error handling
}
const password = "correct horse battery staple"
// Encrypt the private key with the password
encryptedKey, err := minisign.EncryptKey(password, privateKey)
if err != nil {
panic(err) // TODO: error handling
}
// Then, decrypt the encrypted key with the password again
decryptedKey, err := minisign.DecryptKey(password, encryptedKey)
if err != nil {
panic(err) // TODO: error handling
}
// Now, both private keys should be identical
fmt.Println(privateKey.Equal(decryptedKey))
// Output: true
}
func ExampleDecryptKey() {
const (
rawPrivateKey = "RWRTY0IyorAWr/1gdweGki6ua7GpmoPqS+7rMBSmBy6hedA53dAAABAAAAAAAAAAAAIAAAAAwfmyB6qIIW2eGNiQaFzgs1oi52iN8cRHBPRupc9TVdfAeJvlPdvzu3TfA2DHTW2PZi98uihcr5sEB5fefFml2d0xBk72ZOGNJpOTsn95eHgEH/qUfzQZ018JfiVwWf8pNpdgNFX8ROs="
password = "correct horse battery staple"
)
// Decrypt the raw private key with the password
privateKey, err := minisign.DecryptKey(password, []byte(rawPrivateKey))
if err != nil {
panic(err) // TODO: error handling
}
// Print the key ID as upper-case hex string
fmt.Println("Private Key", strings.ToUpper(strconv.FormatUint(privateKey.ID(), 16)))
// Output: Private Key A345BDA18A33D06
}
func ExampleSign() {
const (
rawPrivateKey = "RWRTY0IyorAWr/1gdweGki6ua7GpmoPqS+7rMBSmBy6hedA53dAAABAAAAAAAAAAAAIAAAAAwfmyB6qIIW2eGNiQaFzgs1oi52iN8cRHBPRupc9TVdfAeJvlPdvzu3TfA2DHTW2PZi98uihcr5sEB5fefFml2d0xBk72ZOGNJpOTsn95eHgEH/qUfzQZ018JfiVwWf8pNpdgNFX8ROs="
password = "correct horse battery staple"
)
// Decrypt the raw private key with the password
privateKey, err := minisign.DecryptKey(password, []byte(rawPrivateKey))
if err != nil {
panic(err) // TODO: error handling
}
// Sign a message with the private key
message := []byte("Hello Gopher!")
signature := minisign.Sign(privateKey, message)
fmt.Println(string(signature))
}
func ExampleSignWithComments() {
const (
rawPrivateKey = "RWRTY0IyorAWr/1gdweGki6ua7GpmoPqS+7rMBSmBy6hedA53dAAABAAAAAAAAAAAAIAAAAAwfmyB6qIIW2eGNiQaFzgs1oi52iN8cRHBPRupc9TVdfAeJvlPdvzu3TfA2DHTW2PZi98uihcr5sEB5fefFml2d0xBk72ZOGNJpOTsn95eHgEH/qUfzQZ018JfiVwWf8pNpdgNFX8ROs="
password = "correct horse battery staple"
)
// Decrypt the raw private key with the password
privateKey, err := minisign.DecryptKey(password, []byte(rawPrivateKey))
if err != nil {
panic(err) // TODO: error handling
}
// Sign a message with comments with the private key
const (
trustedComment = "This comment is signed and can be trusted"
untrustedComment = "This comment is not signed and just informational"
)
message := []byte("Hello Gopher!")
signature := minisign.SignWithComments(privateKey, message, trustedComment, untrustedComment)
fmt.Println(string(signature))
// Output: untrusted comment: This comment is not signed and just informational
// RWQGPaMY2ls0CmMflCAP5J/MpaXmt+3+UoT1vRSPRjXO6w0KNtpkcQe3TxQ35kAwhjFVB6CEYYrHZmMvWjXRutefRHicRUiAJwQ=
// trusted comment: This comment is signed and can be trusted
// /jXXGSI/q3MhrZ5PKzL221/qC+JFVpgilf9su6AcTtMffw+9ShYt5LjU2RG1M/EspIoEv4xxK/36TeCQBgHbBw==
}
func ExampleVerify() {
const rawPublicKey = "RWQGPaMY2ls0CkF/83ls7D+IU25w3jeYczwo3s451zDlnrJJwOdt2ro8"
var (
message = []byte("Hello Gopher!")
signature = []byte(`untrusted comment: signature from private key: A345BDA18A33D06
RWQGPaMY2ls0CmMflCAP5J/MpaXmt+3+UoT1vRSPRjXO6w0KNtpkcQe3TxQ35kAwhjFVB6CEYYrHZmMvWjXRutefRHicRUiAJwQ=
trusted comment: timestamp:1600100266
2x/lxCqL+PHoT4I9Wc8PHmoNBtohgmFdWwPBON55Y2P0ttpBHgr4OFldr/Hq7nDcBGt5SBs2XjtMnxjVs6byBg==`)
)
var publicKey minisign.PublicKey
if err := publicKey.UnmarshalText([]byte(rawPublicKey)); err != nil {
panic(err) // TODO: error handling
}
if minisign.Verify(publicKey, message, signature) {
fmt.Println(string(message))
}
// Output: Hello Gopher!
}
func ExampleReader() {
// Generate a new minisign public / private key pair.
publicKey, privateKey, err := minisign.GenerateKey(rand.Reader)
if err != nil {
panic(err) // TODO: error handling
}
const Message = "Hello Gopher!"
// Sign a data stream after processing it. (Here, we just discard it)
reader := minisign.NewReader(strings.NewReader(Message))
if _, err := io.Copy(io.Discard, reader); err != nil {
panic(err) // TODO: error handling
}
signature := reader.Sign(privateKey)
// Read a data stream and then verify its authenticity with
// the public key.
reader = minisign.NewReader(strings.NewReader(Message))
message, err := io.ReadAll(reader)
if err != nil {
panic(err) // TODO: error handling
}
if reader.Verify(publicKey, signature) {
fmt.Println(string(message))
}
// Output: Hello Gopher!
}