diff --git a/Cargo.toml b/Cargo.toml
index 7312990..ee0e860 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,8 @@ indicatif = "0.13.0"
 urlencoding = "1.0.0"
 base64 = "0.11.0"
 reqwest = "0.9.22"
+sequoia-openpgp = "0.12.0"
+oss-rust-sdk = "0.1.12"
 rust_util = { git = "https://github.com/jht5945/rust_util" }
 
 
diff --git a/src/main.rs b/src/main.rs
index cc493e5..e0b4f76 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,30 +1,134 @@
+extern crate sequoia_openpgp as openpgp;
 pub mod oss_util;
+pub mod pgp_util;
 
 use std::{
-    fs::File,
+    io::Write,
     time::SystemTime,
 };
-use oss_util::{
-    OSSClient
-};
 use rust_util::{
     XResult,
 };
+use crate::openpgp::armor;
+use openpgp::{
+    types::KeyFlags,
+    TPK,
+    parse::Parse,
+    serialize::stream::{
+        Message, Encryptor, LiteralWriter,
+    },
+};
 
+// https://docs.sequoia-pgp.org/sequoia_openpgp/serialize/stream/struct.Encryptor.html
+// https://gitlab.com/sequoia-pgp/sequoia/blob/master/openpgp/examples/generate-encrypt-decrypt.rs
 fn main() -> XResult<()> {
     println!("Hello, world!");
 
     println!("{}", SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs());
 
-    let oss_client = OSSClient::new("oss-cn-shanghai.aliyuncs.com", "***", "***");
-    let oss_put_url = oss_client.generate_signed_put_url("hatterbucket", "abc_2.txt", 1000_u64);
+    // let oss_client = OSSClient::new("oss-cn-shanghai.aliyuncs.com", "***", "***");
+    // let oss_put_url = oss_client.generate_signed_put_url("hatterbucket", "abc_2.txt", 1000_u64);
 
-    let client = reqwest::Client::new();
-    let f = File::open("README.md")?;
-    let resp = client.put(&oss_put_url)
-                     .body(f)
-                     .send()?;
-    println!("RESP: {:?}", resp);
+    // let client = reqwest::Client::new();
+    // let f = File::open("README.md")?;
+    // let resp = client.put(&oss_put_url)
+    //                  .body(f)
+    //                  .send()?;
+    // println!("RESP: {:?}", resp);
+
+    let b = r#"-----BEGIN PGP PUBLIC KEY BLOCK-----
+    Comment: GPGTools - https://gpgtools.org
+    
+    mQINBFbFsmEBEACvuRVhMfEWNkP2RP7D3sEaId+qXKi6UnXRxGppbBff+Zkp+h4Y
+    mQEOCUWct+C0eFeK8+pFKfvewJfozQcLNKr0z92uSaz8fxx5wzTxKhl1lMzRNWv9
+    zzDRkDsimh16v0r/0t0akiChzepryF1jacdPAZgnndpC/fad45yDen+/Op3OCbBu
+    TgkuNwgyE65NSPjEzw4yeTFGnLL34aGLbZehlcPG7yZ4jY9zyMz7OlFhvTB3Tp13
+    bfWbTcIrzQsDBK8ift0YUCv7FMXlcqilcdi+5P71KyGzNs/j6lKpsQdmEk5fX+iz
+    5Sjwop/KyJ8kEp8oJW9VaGjxAJaheCI244ndxihOF9bBSkhLVLnV6X9889KTcrb3
+    mOVkA433ISzN3MocZUY6u0nt71dLEoheqEa6zZcDXh4y+FB1o6B39uxxchh7hjOq
+    9qq9VGINQ/xvMD7jDRy0HTD0dEUYrmVqNOf9BC+Qo/0lBebpNvYYH7CO5TfA9eEp
+    FaxwTNsdXAyrZaJpgfm9ZWEcjqVupdxaS9mLaBldA/KsArNRq7VnaUE3bGLZy/n7
+    0km2Hmkd5u4s5Zu5/VZXidHV91I10bsYaaMb3nXD/VtOoiXM3hWXqR2it7i7jlTi
+    Q7hd/serxvyTzKzXTsQ2mA7uUH0ougwwUpK+Mb4Q8QXeDzLAppLyZlBf6wARAQAB
+    tDZIYXR0ZXIgSmlhbmcgKEhhdHRlcidzIDQwOTYgUEdQL0MpIDxqaHQ1OTQ1QGdt
+    YWlsLmNvbT6JAjcEEwEKACEFAlbFsmECGwMFCwkIBwMFFQoJCAsFFgIDAQACHgEC
+    F4AACgkQx5SxZGqIbNYG1g/+OMVm/ETLj9tPxZd3zHyVhtJXHT3PTzg/L07EIWsH
+    58aOYjfHNtJXG58LLGQWYWZ9A2/s8iTR68Yy9dwUZ/hFwIhblV4Yisb2aI4T7SH6
+    LhoBJwP97IksY5Ywnk4MJyA+rpknoANSn/VLGz/siVpr58+F4t304PeGzi3ij/M7
+    MLOPr0qu0zs+gU5YU+Ge27MRH60NgEZCnSt0HChKQk42wy/QU/Sk1XoISSjETIi+
+    MAs9UAjYlQ47CLYSk8sgvsD4MzH+YieMDxNyxvzgsRMa1gub5xnJCzOIn9Dm0Lkp
+    PH1fvWG61F2us8wLq1tQZ9c4UOsjUYzcFV+XRatD0ELla0nkoCtrCgxiUiMLTu6D
+    xGIfcDDOgwK9GbrLer0mxUbWddQMLX6ieoCnU8q7tZohl8MZdYz+SHMP2D8tF007
+    oYhC9rXI/iP1hQ1XkM7KRGByvdAzlR4Ev8eEJv7ADRc0+OLvlirT8kX77I2WVUKx
+    oDJvu5LoUDQS/PjYD42yCM1TULUopnJ+SQQ4jMKmJ8LwulLvbzBR4HDEzXAlsEjg
+    Y785r7CKT6FR6X25Qx77VBgSMpsjcH/SM+64y4dKNO089kJo1ol1go+HURMvwgD0
+    tRCut57t2JXuOK6S47CN61z6RexsYOSgv9Q/9KrpvIZXrYznvKE3/QcpNKpcVd0b
+    u7O5Ag0EVsWyYQEQAKVDPDPkETFMNHSL1yEhceN4+IfQit/GPRw+pD3HN2dHQhj4
+    hcu2XtDkHmz1h8lGdmJqrHcsxbjkLlfT9qccY/1iyIEamVfCZPLVobQIzjr5tDE3
+    Nq4PhCR32vs4V+HhRDLI+A70ATCQ14ip6V0zP4+6DCqSFEB6n1wcLBCRy5h2Uy3h
+    ARGCnGV0wJrrt1ncSuY7xHNNl7doWdXwbNDPXv9hDHt7evWh+P62m4gYxdofSXXt
+    ecKyTMV2ggliamIWwUtAidwXY5AKjiKXKj172sYiTdaTaSvHowPUODZse6cZ737/
+    oQj5Fl2Ut6/wVmfZRWXPLhK0BGweIC4JKPIzpX0Be3GKrWRLOvamPJ5yFAbKmWHw
+    Kfm0HdsQhUmxGQJfjq7Rs31Yw/WBTD8tNvsUYL9jdyk9yhx77lO1sa73367IT9n8
+    A7htjAZZnKtbLgCsQNHGD0smo3HhKsP96IEqe+0mMeNa0/BFi5k71NAh8wrLn/zu
+    7A1mUX8WrQM1oQQYZygj6s4s6TkDqpvF4Qre+BX52mz6RzPV1I6ECD607LMkt3lq
+    sp8yYgKns+r9iytn4S+yJHC7b7eaefWPimOCOmENPYlIe5SiR0YZIE6JlLqyR4nl
+    RzFhRiB6HxAvp1OqRiFIdD+za9Bs+ORiU8FhnYVud1nyJo2vm+ZMMMqlIpMjABEB
+    AAGJAh8EGAEKAAkFAlbFsmECGwwACgkQx5SxZGqIbNY2wBAAqrHidGC5c5nz84+w
+    +gGlYfX+UQZU2UIHBAhEdCICCPXWmPnl5MMXP+ytXkYIcl/cSu4SUMYw4i2masIT
+    0+izCFYSVBqpINtwT0BCVDyqvOwgYOLkm3iB/R/TC5E/bUi2uwcXs/KARDHE2OkM
+    1fBvQ2y1ZWn/dJnIb08omtxZC6XODNTo9fGRI2ulqIWC9XFLt08eqUNntamUIPhB
+    FnVJZRNHpccrA67lng/1i3Lt311XeqEdB2Nf3FwYYD7i/NpKWY5n2DM6ozop22BD
+    ly+XAD6fS+UHEIagOFI9w0q+8FJ9XrJdQvE8QzP3zvFM2OOIQwd4Ec5iswCPs7Jy
+    PqeRxyPh8V5UYeG3V7PG/zq5bPU7xQq65/drPMpRrUV52HGSF1PQrq7hYjCgrIS3
+    7dicVhOV8+YOtakAD0jQcGRW4JVSGVwxi1hYbwt4rsD5GrH2V1nWrucDJyg7FZbm
+    CUVQQ2d5JcRUJk2Fu0raqVLdfTEFARhbjw73RPVAI6/Na9EGPZfFwP7FPbxCdB7M
+    s8s+wmaIEKRk5ShWned3GKIVUOhU71z2k37geBDmPLFp+zYZXU5F6JqrasUVtiqy
+    l2f0qZFpp7WqvJP3IwSTgFKJ3MGxdaK76eiav9s+w0JFXD9tMCn9r0xoXm2aqIui
+    u1lgCI4J/S53gMfQr2gBNZW3xeq5Ag0EVsWydQEQAPCoOX4OO2IpU/8RTme8Ste0
+    +O3H8M0ui/+CEbU43MoL5jlUnTiEooUMVX7MoKcYU4UUN6Y6oRRqh/S1CKa8v2vI
+    VnzzGWKJWMsAb3ceUulBg1HkX9sy3EWK0KPhbPaMXYcTxNOR4VpfS+TkZ+B1s0WU
+    pDX4ezwyjyUVGiVfObgehcr7dBhmNeKZiDWezUSy4trm2AZadwi0oe13ZXlRPP0O
+    oMmudNSDYV1JLLsB13T2LXFxd5flSHTHOmCU8YrxS7bo6ohAHxMGrrr/tRs7DWQz
+    oOiX0nPtXe4mTIsVOEayrczOe2cBl9GwCtzEHT+ok9tAzmKvwQyU1yboUAVoBOqS
+    A4kyReKvyH9GS8VPpMbLQBINH7g/sDoP/uFtQUp+Q94Unb1TsYI94VrT7nQFaULn
+    D/Cyp6uQdKMuC3Rql1wEGCdkPpZ9DfQctk/Dfz9+xzrEe8iS5fHDNhabQqKOMVYh
+    s5iG4q/BMmelUJqIvH6jj+MfZx+V3jQNiQlSxHNKOp+TyeCIrWGAm9DRjj0x1RRM
+    9qs8ZEAycUuaAuxnXVkAf6WuCatBC/XRGmwdqD8r2AQJphNB82Vi5d09ZEdXSXwF
+    7qoEoRXGS12tUhVKS85SYt4wEbsaGlHh5yj98XgHfKOVjwcM1zOyy+O507njWrhW
+    SsB7P3vceBLM0P6haNrhABEBAAGJAh8EGAEKAAkFAlbFsnUCGyAACgkQx5SxZGqI
+    bNYgSxAAivqcmdH1rO2AUqFG6w3788+p52yK8RhUp+jj3e6HQmzYABg5qsU/Aq7Q
+    kTMqsV+W12P+SetefiSdzJWvhOsyR1IivLJCQdgNQFRf6QRm0yuOJCX9I/Q9LNGQ
+    qwL/86jT1pM5dOx97h7VWf7wA2cpPARCIXnFftz08fG9FFJIM8zQuCWeVQqnVQ8X
+    be3ar+HbgDMsAm5MvBu+7Ni/1vSkevxw+EbCavSMnz5k1HmABZceHvSP/K+CSCB4
+    XA6Z+GbXx/8HTqUiho6aqifsoLBkDhwxNYHGtZVIigI3N9JIu9JILgCdEtkO7LVG
+    EjqUEteCn41f3y3YpzQLjOmYF7LNLUIYaD3KoL6fnrOXPdbq0dYsoWHWQ4ndlNbn
+    mZRgfN/IatnSXcA+keRUd1bXgB4jVhv0P38jH9DsrYeb3xOmd6RSCdKFBLV4PkGZ
+    +6FdbJQ5ZmvmhYinyAP5yqIqig/9W6v/BnQlbocEEdDLfY1UMUl7kSB8Wz9t74BH
+    1rkCwHJxVp+tOfY+pCG0aVHFW6WIHFR0dFpc4D2Wksed1m4cqjmbqfPANu4G01wX
+    tYVrOQO08M4xbeeClpW9DqxR7toB860Hoq8aonXikmaJXxrv3V6/rLofCHInH22a
+    VvhSegJ3QeP4bkBgxW1X6t1QgQGRJnundzv4U+tKbltS5hPmvcU=
+    =HzsD
+    -----END PGP PUBLIC KEY BLOCK-----"#.as_bytes();
+
+
+    let tpk = TPK::from_bytes(b)?;
+
+    let recipient = tpk.keys_valid()
+                       .key_flags(KeyFlags::default()
+                       .set_encrypt_at_rest(true)
+                       .set_encrypt_for_transport(true))
+                       .map(|(_, _, key)| key.into())
+                       .nth(0)
+                       .unwrap();
+
+    let sink = armor::Writer::new(std::io::stdout(), armor::Kind::Message, &[])?;
+
+    let message = Message::new(sink);
+    let encryptor = Encryptor::for_recipient(message, recipient).build()?;
+    let mut pgp_encrypt_writer = LiteralWriter::new(encryptor).build()?;
+    pgp_encrypt_writer.write_all(b"Hello world.")?;
+    pgp_encrypt_writer.finalize()?;
 
     Ok(())
 }
diff --git a/src/oss_util.rs b/src/oss_util.rs
index b42b47e..cdbbe09 100644
--- a/src/oss_util.rs
+++ b/src/oss_util.rs
@@ -1,4 +1,5 @@
 use std::{
+    fs::File,
     time::SystemTime,
 };
 use crypto::{
@@ -9,6 +10,8 @@ use crypto::{
     hmac::Hmac,
     sha1::Sha1,
 };
+use rust_util::XResult;
+use reqwest::Response;
 
 pub const OSS_VERB_GET: &str = "GET";
 pub const OSS_VERB_PUT: &str = "PUT";
@@ -29,6 +32,11 @@ impl<'a> OSSClient<'a> {
         }
     }
 
+    pub fn put_file(&self, bucket_name: &str, key: &str, expire_in_seconds: u64, file: File) -> XResult<Response> {
+        let client = reqwest::Client::new();
+        Ok(client.put(&self.generate_signed_put_url(bucket_name, key, expire_in_seconds)).body(file).send()?)
+    }
+
     pub fn generate_signed_put_url(&self, bucket_name: &str, key: &str, expire_in_seconds: u64) -> String {
         self.generate_signed_url(OSS_VERB_PUT, bucket_name, key, expire_in_seconds, true)
     }
diff --git a/src/pgp_util.rs b/src/pgp_util.rs
new file mode 100644
index 0000000..99d54d4
--- /dev/null
+++ b/src/pgp_util.rs
@@ -0,0 +1,65 @@
+extern crate sequoia_openpgp as openpgp;
+use crate::openpgp::armor;
+use std::{
+    fs::File,
+    io::{
+        Write,
+        BufWriter,
+    },
+};
+use rust_util::{
+    XResult,
+    new_box_error,
+};
+use openpgp::{
+    types::KeyFlags,
+    TPK,
+    parse::Parse,
+    serialize::stream::{
+        Recipient,
+        Message,
+        Encryptor,
+        LiteralWriter,
+    },
+};
+
+pub struct OpenPGPClient {
+    pub tpk: TPK,
+}
+
+impl OpenPGPClient {
+    pub fn from_file(file: &str) -> XResult<OpenPGPClient> {
+        Ok(OpenPGPClient{
+            tpk: TPK::from_file(std::path::Path::new(file))?,
+        })
+    }
+
+    pub fn from_bytes(bs: &[u8]) -> XResult<OpenPGPClient> {
+        Ok(OpenPGPClient{
+            tpk: TPK::from_bytes(&bs)?,
+        })
+    }
+
+    pub fn encrypt_file(&self, from_file: &str, to_file: &str, armor: bool) -> XResult<()> {
+        let recipient: Recipient = match self.tpk.keys_valid()
+            .key_flags(KeyFlags::default().set_encrypt_at_rest(true).set_encrypt_for_transport(true))
+            .map(|(_, _, key)| key.into())
+            .nth(0) {
+                None => return Err(new_box_error("Encryption key not found in TPK")),
+                Some(r) => r,
+            };
+        let message = if armor {
+            Message::new(armor::Writer::new(std::io::stdout(), armor::Kind::Message, &[])?)
+        } else {
+            Message::new(BufWriter::new(File::open(to_file)?))
+        };
+        let encryptor = Encryptor::for_recipient(message, recipient).build()?;
+        let mut pgp_encrypt_writer = LiteralWriter::new(encryptor).build()?;
+        // TODO read from from_file
+        pgp_encrypt_writer.write_all(b"Hello world.")?;
+        pgp_encrypt_writer.finalize()?;
+                                    
+        Ok(())
+    }
+}
+