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updated signing message section of README.md #263

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updated signing message section of README.md #263

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27 changes: 22 additions & 5 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -235,16 +235,33 @@ const privkey = `-----BEGIN PGP PRIVATE KEY BLOCK-----
-----END PGP PRIVATE KEY BLOCK-----` // Encrypted private key
const passphrase = []byte("LongSecret") // Private key passphrase

var message = crypto.NewPlaintextMessage("Verified message")
var message = crypto.NewPlainMessageFromString("Verified message")

privateKeyObj, err := crypto.NewKeyFromArmored(privkey)
unlockedKeyObj = privateKeyObj.Unlock(passphrase)
signingKeyRing, err := crypto.NewKeyRing(unlockedKeyObj)
privateKeyObj, err := crypto.NewKeyFromArmoredReader(f)
if err != nil {
log.Fatalf("failed to create private key object, %s", err)
}

pgpSignature, err := signingKeyRing.SignDetached(message, trimNewlines)
unlockedKeyObj, err := privateKeyObj.Unlock(passphrase)
if err != nil {
log.Fatalf("failed to unlock key %s", err)
}

signingKeyring, err := crypto.NewKeyRing(unlockedKeyObj)
if err != nil {
log.Fatalf("failed to create new keyring %s", err)
}

pgpSignature, err := signingKeyring.SignDetached(message)
if err != nil {
log.Fatalf("failed to sign message %s", err)
}

// The armored signature is in pgpSignature.GetArmored()
fmt.Println(pgpSignature.GetArmored())

// The signed text is in message.GetString()
fmt.Println(message.GetString())
```

To verify a signature either private or public keyring can be provided.
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