src/bin/proxmox-backup-client.rs: implement "key change-passphrase"
This commit is contained in:
Dietmar Maurer
parent
f2401311b0
commit
ac71623483
@ -803,31 +803,13 @@ fn get_encryption_key_password() -> Result<String, Error> {
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bail!("no password input mechanism available");
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}
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fn key_create(
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param: Value,
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_info: &ApiMethod,
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_rpcenv: &mut dyn RpcEnvironment,
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) -> Result<Value, Error> {
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let repo_url = tools::required_string_param(¶m, "repository")?;
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let repo: BackupRepository = repo_url.parse()?;
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let base = BaseDirectories::with_prefix("proxmox-backup")?;
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let repo = repo.to_string();
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// usually $HOME/.config/proxmox-backup/xxx.enc_key
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let path = base.place_config_file(&format!("{}.enc_key", repo))?;
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let password = get_encryption_key_password()?;
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let raw_key = proxmox::sys::linux::random_data(32)?;
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fn key_store_with_password(path: &std::path::Path, raw_key: &[u8], password: &[u8], replace: bool) -> Result<(), Error> {
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let salt = proxmox::sys::linux::random_data(32)?;
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let scrypt_config = SCryptConfig { n: 65536, r: 8, p: 1, salt };
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let derived_key = CryptConfig::derive_key_from_password(password.as_bytes(), &scrypt_config)?;
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let derived_key = CryptConfig::derive_key_from_password(password, &scrypt_config)?;
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let cipher = openssl::symm::Cipher::aes_256_gcm();
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@ -862,16 +844,160 @@ fn key_create(
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let data = result.to_string();
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try_block!({
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let mut file = std::fs::OpenOptions::new()
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.write(true)
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.create_new(true)
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.open(&path)?;
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if replace {
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let mode = nix::sys::stat::Mode::S_IRUSR | nix::sys::stat::Mode::S_IWUSR;
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crate::tools::file_set_contents(&path, data.as_bytes(), Some(mode))?;
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} else {
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use std::os::unix::fs::OpenOptionsExt;
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file.write_all(data.as_bytes())?;
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let mut file = std::fs::OpenOptions::new()
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.write(true)
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.mode(0o0600)
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.create_new(true)
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.open(&path)?;
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file.write_all(data.as_bytes())?;
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}
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Ok(())
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}).map_err(|err: Error| format_err!("Unable to create file {:?} - {}", path, err))?;
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Ok(())
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}
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fn key_create(
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param: Value,
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_info: &ApiMethod,
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_rpcenv: &mut dyn RpcEnvironment,
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) -> Result<Value, Error> {
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let repo_url = tools::required_string_param(¶m, "repository")?;
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let repo: BackupRepository = repo_url.parse()?;
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let base = BaseDirectories::with_prefix("proxmox-backup")?;
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let repo = repo.to_string();
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// usually $HOME/.config/proxmox-backup/xxx.enc_key
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let path = base.place_config_file(&format!("{}.enc_key", repo))?;
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let password = get_encryption_key_password()?;
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let key = proxmox::sys::linux::random_data(32)?;
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key_store_with_password(&path, &key, password.as_bytes(), false)?;
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Ok(Value::Null)
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}
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fn key_load_and_decrtypt(path: &std::path::Path) -> Result<Vec<u8>, Error> {
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let data = crate::tools::file_get_json(&path, None)?;
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println!("DATA: {:?}", data);
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match data["kdf"].as_str() {
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Some(kdf) => {
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if kdf != "scrypt" {
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bail!("Unknown key derivation function '{}'", kdf);
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}
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},
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None => bail!("missing property 'kdf'."),
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}
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let salt = match data["salt"].as_str() {
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Some(hex) => proxmox::tools::hex_to_bin(hex)?,
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None => bail!("missing property 'salt'."),
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};
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let n = match data["n"].as_u64() {
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Some(n) => n,
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None => bail!("missing property 'n'."),
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};
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let r = match data["r"].as_u64() {
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Some(r) => r,
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None => bail!("missing property 'r'."),
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};
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let p = match data["p"].as_u64() {
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Some(p) => p,
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None => bail!("missing property 'p'."),
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};
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let scrypt_config = SCryptConfig { n, r, p, salt };
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let password = get_encryption_key_password()?;
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if password.len() < 5 {
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bail!("Password is too short!");
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}
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let derived_key = CryptConfig::derive_key_from_password(password.as_bytes(), &scrypt_config)?;
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let iv = match data["iv"].as_str() {
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Some(hex) => proxmox::tools::hex_to_bin(hex)?,
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None => bail!("missing property 'iv'."),
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};
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let tag = match data["tag"].as_str() {
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Some(hex) => proxmox::tools::hex_to_bin(hex)?,
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None => bail!("missing property 'tag'."),
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};
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let data = match data["data"].as_str() {
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Some(hex) => proxmox::tools::hex_to_bin(hex)?,
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None => bail!("missing property 'data'."),
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};
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let cipher = openssl::symm::Cipher::aes_256_gcm();
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let decr_data = openssl::symm::decrypt_aead(
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cipher,
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&derived_key,
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Some(&iv),
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b"", //??
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&data,
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&tag,
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).map_err(|err| format_err!("Unable to decrypt key - {}", err))?;
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Ok(decr_data)
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}
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fn key_change_passphrase(
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param: Value,
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_info: &ApiMethod,
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_rpcenv: &mut dyn RpcEnvironment,
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) -> Result<Value, Error> {
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let repo_url = tools::required_string_param(¶m, "repository")?;
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let repo: BackupRepository = repo_url.parse()?;
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let base = BaseDirectories::with_prefix("proxmox-backup")?;
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let repo = repo.to_string();
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// usually $HOME/.config/proxmox-backup/xxx.enc_key
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let path = base.place_config_file(&format!("{}.enc_key", repo))?;
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// we need a TTY to query the new password
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if !crate::tools::tty::stdin_isatty() {
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bail!("unable to change passphrase - no tty");
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}
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let key = key_load_and_decrtypt(&path)?;
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let new_pw = String::from_utf8(crate::tools::tty::read_password("New Password: ")?)?;
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let verify_pw = String::from_utf8(crate::tools::tty::read_password("Verify Password: ")?)?;
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if new_pw != verify_pw {
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bail!("Password verification fail!");
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}
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if new_pw.len() < 5 {
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bail!("Password is too short!");
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}
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key_store_with_password(&path, &key, new_pw.as_bytes(), true)?;
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Ok(Value::Null)
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}
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@ -887,8 +1013,18 @@ fn key_mgmt_cli() -> CliCommandMap {
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.arg_param(vec!["repository"])
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.completion_cb("repository", complete_repository);
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let key_change_passphrase_cmd_def = CliCommand::new(
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ApiMethod::new(
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key_change_passphrase,
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ObjectSchema::new("Change the passphrase required to decrypt the key.")
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.required("repository", REPO_URL_SCHEMA.clone())
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))
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.arg_param(vec!["repository"])
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.completion_cb("repository", complete_repository);
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let cmd_def = CliCommandMap::new()
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.insert("create".to_owned(), key_create_cmd_def.into());
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.insert("create".to_owned(), key_create_cmd_def.into())
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.insert("change-passphrase".to_owned(), key_change_passphrase_cmd_def.into());
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cmd_def
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}
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