49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
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// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package activitypub
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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)
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const rsaBits = 2048
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// GenerateKeyPair generates a public and private keypair for signing actions by users for activitypub purposes
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func GenerateKeyPair() (string, string, error) {
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priv, _ := rsa.GenerateKey(rand.Reader, rsaBits)
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privPem, err := pemBlockForPriv(priv)
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if err != nil {
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return "", "", err
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}
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pubPem, err := pemBlockForPub(&priv.PublicKey)
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if err != nil {
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return "", "", err
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}
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return privPem, pubPem, nil
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}
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func pemBlockForPriv(priv *rsa.PrivateKey) (string, error) {
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privBytes := pem.EncodeToMemory(&pem.Block{
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Type: "RSA PRIVATE KEY",
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Bytes: x509.MarshalPKCS1PrivateKey(priv),
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})
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return string(privBytes), nil
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}
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func pemBlockForPub(pub *rsa.PublicKey) (string, error) {
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pubASN1, err := x509.MarshalPKIXPublicKey(pub)
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if err != nil {
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return "", err
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}
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pubBytes := pem.EncodeToMemory(&pem.Block{
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Type: "PUBLIC KEY",
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Bytes: pubASN1,
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})
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return string(pubBytes), nil
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}
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