git_crypt/
gpg.rs

1#[cfg(feature = "gpg")]
2use sequoia_openpgp::{
3    cert::CertParser,
4    crypto::SessionKey,
5    parse::Parse,
6    policy::StandardPolicy,
7    serialize::stream::{Armorer, Encryptor, LiteralWriter, Message},
8    Cert, KeyHandle,
9};
10
11#[cfg(feature = "gpg")]
12use std::io::{Read, Write};
13
14use crate::crypto::CryptoKey;
15use crate::error::{GitCryptError, Result};
16
17pub struct GpgManager;
18
19impl GpgManager {
20    /// Encrypt a key for a GPG recipient
21    #[cfg(feature = "gpg")]
22    pub fn encrypt_key_for_recipient(
23        key: &CryptoKey,
24        recipient_fingerprint: &str,
25    ) -> Result<Vec<u8>> {
26        let p = &StandardPolicy::new();
27
28        // Parse recipient certificate (from keyring or file)
29        // This is a simplified version - in practice, you'd need to fetch from keyring
30        let cert = Self::get_cert_from_keyring(recipient_fingerprint)?;
31
32        // Get recipients
33        let recipients = cert
34            .keys()
35            .with_policy(p, None)
36            .supported()
37            .for_transport_encryption()
38            .map(|ka| ka.key())
39            .collect::<Vec<_>>();
40
41        if recipients.is_empty() {
42            return Err(GitCryptError::Gpg(
43                "No encryption-capable keys found for recipient".into(),
44            ));
45        }
46
47        // Create encrypted message
48        let mut encrypted = Vec::new();
49        {
50            let message = Message::new(&mut encrypted);
51            let message = Armorer::new(message).build()
52                .map_err(|e| GitCryptError::Gpg(e.to_string()))?;
53            let message = Encryptor::for_recipients(message, recipients)
54                .build()
55                .map_err(|e| GitCryptError::Gpg(e.to_string()))?;
56            let mut message = LiteralWriter::new(message)
57                .build()
58                .map_err(|e| GitCryptError::Gpg(e.to_string()))?;
59
60            message.write_all(key.as_bytes())
61                .map_err(|e| GitCryptError::Gpg(e.to_string()))?;
62            message.finalize()
63                .map_err(|e| GitCryptError::Gpg(e.to_string()))?;
64        }
65
66        Ok(encrypted)
67    }
68
69    /// Encrypt a key for a GPG recipient (no GPG support compiled in)
70    #[cfg(not(feature = "gpg"))]
71    pub fn encrypt_key_for_recipient(
72        _key: &CryptoKey,
73        _recipient_fingerprint: &str,
74    ) -> Result<Vec<u8>> {
75        Err(GitCryptError::Gpg(
76            "GPG support not enabled. Rebuild with --features gpg".into(),
77        ))
78    }
79
80    /// Decrypt a GPG-encrypted key
81    #[cfg(feature = "gpg")]
82    pub fn decrypt_key(encrypted_data: &[u8]) -> Result<CryptoKey> {
83        // This is a placeholder - actual implementation would need:
84        // 1. Access to private key
85        // 2. Proper decryption with sequoia-openpgp
86        // 3. Password handling for encrypted private keys
87
88        // For now, return an error indicating this needs implementation
89        Err(GitCryptError::Gpg(
90            "GPG decryption requires private key access - to be implemented".into(),
91        ))
92    }
93
94    /// Decrypt a GPG-encrypted key (no GPG support compiled in)
95    #[cfg(not(feature = "gpg"))]
96    pub fn decrypt_key(_encrypted_data: &[u8]) -> Result<CryptoKey> {
97        Err(GitCryptError::Gpg(
98            "GPG support not enabled. Rebuild with --features gpg".into(),
99        ))
100    }
101
102    /// Get a certificate from the keyring
103    #[cfg(feature = "gpg")]
104    fn get_cert_from_keyring(fingerprint: &str) -> Result<Cert> {
105        // This is a placeholder - actual implementation would:
106        // 1. Query the GPG keyring (via sequoia or gpgme)
107        // 2. Look up by fingerprint or key ID
108        // 3. Return the certificate
109
110        Err(GitCryptError::Gpg(
111            format!("Certificate lookup not yet implemented for: {}", fingerprint),
112        ))
113    }
114
115    /// List available GPG keys
116    #[cfg(feature = "gpg")]
117    pub fn list_keys() -> Result<Vec<String>> {
118        // Placeholder for listing available GPG keys
119        Err(GitCryptError::Gpg("Key listing not yet implemented".into()))
120    }
121
122    /// List available GPG keys (no GPG support compiled in)
123    #[cfg(not(feature = "gpg"))]
124    pub fn list_keys() -> Result<Vec<String>> {
125        Err(GitCryptError::Gpg(
126            "GPG support not enabled. Rebuild with --features gpg".into(),
127        ))
128    }
129}
git_crypt/gpg.rs

git_crypt/
gpg.rs
