85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
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package pgp
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import (
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"crypto"
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"golang.org/x/crypto/openpgp"
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"golang.org/x/crypto/openpgp/packet"
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)
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func GetEntity(publicKey []byte, privateKey []byte) (*openpgp.Entity, error) {
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publicKeyPacket, err := getPublicKeyPacket(publicKey)
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if err != nil {
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return nil, err
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}
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var privateKeyPacket *packet.PrivateKey
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if len(privateKey) > 0 {
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privateKeyPacket, err = getPrivateKeyPacket(privateKey)
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if err != nil {
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return nil, err
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}
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}
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return createEntityFromKeys(publicKeyPacket, privateKeyPacket)
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}
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// From https://gist.github.com/eliquious/9e96017f47d9bd43cdf9
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func createEntityFromKeys(pubKey *packet.PublicKey, privKey *packet.PrivateKey) (*openpgp.Entity, error) {
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config := packet.Config{
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DefaultHash: crypto.SHA256,
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DefaultCipher: packet.CipherAES256,
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DefaultCompressionAlgo: packet.CompressionZLIB,
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CompressionConfig: &packet.CompressionConfig{
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Level: 9,
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},
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RSABits: 4096,
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}
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currentTime := config.Now()
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uid := packet.NewUserId("", "", "")
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e := openpgp.Entity{
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PrimaryKey: pubKey,
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PrivateKey: privKey,
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Identities: make(map[string]*openpgp.Identity),
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}
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isPrimaryId := false
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e.Identities[uid.Id] = &openpgp.Identity{
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Name: uid.Name,
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UserId: uid,
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SelfSignature: &packet.Signature{
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CreationTime: currentTime,
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SigType: packet.SigTypePositiveCert,
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PubKeyAlgo: packet.PubKeyAlgoRSA,
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Hash: config.Hash(),
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IsPrimaryId: &isPrimaryId,
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FlagsValid: true,
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FlagSign: true,
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FlagCertify: true,
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IssuerKeyId: &e.PrimaryKey.KeyId,
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},
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}
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keyLifetimeSecs := uint32(86400 * 365)
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e.Subkeys = make([]openpgp.Subkey, 1)
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e.Subkeys[0] = openpgp.Subkey{
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PublicKey: pubKey,
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PrivateKey: privKey,
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Sig: &packet.Signature{
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CreationTime: currentTime,
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SigType: packet.SigTypeSubkeyBinding,
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PubKeyAlgo: packet.PubKeyAlgoRSA,
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Hash: config.Hash(),
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PreferredHash: []uint8{8}, // SHA-256
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FlagsValid: true,
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FlagEncryptStorage: true,
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FlagEncryptCommunications: true,
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IssuerKeyId: &e.PrimaryKey.KeyId,
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KeyLifetimeSecs: &keyLifetimeSecs,
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},
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}
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return &e, nil
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}
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