68 lines
2.2 KiB
Go
68 lines
2.2 KiB
Go
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package meowlib
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import (
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"encoding/base64"
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"github.com/ProtonMail/gopenpgp/v2/crypto"
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"github.com/ProtonMail/gopenpgp/v2/helper"
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"github.com/pkg/errors"
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"github.com/rs/zerolog/log"
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)
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func SymEncrypt(password string, data []byte) ([]byte, error) {
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var pgpMessage *crypto.PGPMessage
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var err error
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var message = crypto.NewPlainMessage(data)
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pgpMessage, err = crypto.EncryptMessageWithPassword(message, []byte(password))
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if err != nil {
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return nil, errors.Wrap(err, "gopenpgp: unable to encrypt message with password")
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}
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return pgpMessage.GetBinary(), nil
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}
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func SymDecrypt(password string, data []byte) ([]byte, error) {
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var message *crypto.PlainMessage
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var pgpMessage *crypto.PGPMessage
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var err error
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pgpMessage = crypto.NewPGPMessage(data)
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message, err = crypto.DecryptMessageWithPassword(pgpMessage, []byte(password))
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if err != nil {
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return nil, errors.Wrap(err, "gopenpgp: unable to decrypt message with password")
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}
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return message.GetBinary(), nil
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}
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func SymEncryptAndSign(PublicEncryptionKey string, PrivateSignatureKey string, data []byte) ([]byte, []byte, error) {
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pub, err := base64.StdEncoding.DecodeString(PublicEncryptionKey)
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if err != nil {
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log.Error().Msg("Message encryption and sign b64 failed")
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}
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priv, err := base64.StdEncoding.DecodeString(PrivateSignatureKey)
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if err != nil {
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log.Error().Msg("Message encryption and sign b64 failed")
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}
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encrypted, signature, err := helper.EncryptSignBinaryDetached(string(pub), string(priv), nil, data)
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if err != nil {
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log.Error().Msg("Message encryption and sign failed")
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}
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return []byte(encrypted), []byte(signature), err
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}
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func SymDecryptAndCheck(MyPrivateEncryptionKey string, MyContactPublicKey string, data []byte, Signature []byte) (DecryptedMessage []byte, err error) {
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pub, err := base64.StdEncoding.DecodeString(MyPrivateEncryptionKey)
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if err != nil {
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log.Error().Msg("Message decryption and sign b64 failed")
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}
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priv, err := base64.StdEncoding.DecodeString(MyContactPublicKey)
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if err != nil {
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log.Error().Msg("Message decryption and sign b64 failed")
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}
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DecryptedMessage, err = helper.DecryptVerifyBinaryDetached(string(pub), string(priv), nil, data, string(Signature))
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if err != nil {
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log.Error().Msg("Message decryption and sign failed")
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}
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return DecryptedMessage, err
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}
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