diff --git a/.gitignore b/.gitignore
index 3bf25c0..409abaa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.idea/
 # ---> Rust
 # Generated by Cargo
 # will have compiled files and executables
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..bca0b5f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "aes-gcm-stream"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+aes = { version = "0.8.3", features = ["zeroize"] }
+aes-gcm = { version = "0.10.2", features = ["zeroize"] }
+hex = "0.4.3"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..90d22ee
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,192 @@
+use aes::Aes128;
+use aes::cipher::{Block, BlockEncrypt, KeyInit};
+use aes::cipher::generic_array::GenericArray;
+use aes_gcm::{AeadInPlace, Aes128Gcm, Key};
+use aes_gcm::aead::{Aead, AeadMutInPlace, Nonce};
+
+pub struct GCM {
+    aes: Aes128,
+}
+
+// R = 11100001 || 0(120)
+const R: u128 = 0b11100001 << 120;
+
+fn gmul_128(x: u128, y: u128) -> u128 {
+    let mut z = 0u128;
+    let mut v = y;
+    for i in (0..128).rev() {
+        let xi = (x >> i) & 1;
+        if xi != 0 {
+            z ^= v;
+        }
+        v = match v & 1 == 0 {
+            true => { v >> 1 }
+            false => { (v >> 1) ^ R }
+        };
+    }
+    z
+}
+
+fn u8to128(bytes: &[u8]) -> u128 {
+    let result = bytes.iter().rev().enumerate().fold(0, |acc, (i, &byte)| {
+        acc | (byte as u128) << (i * 8)
+    });
+    result
+}
+
+fn msb_s(s: usize, bytes: [u8; 16]) -> Vec<u8> {
+    let mut result = vec![];
+    let n = s / 8;
+    let remain = s % 8;
+    for i in 0..n {
+        result.push(bytes[i]);
+    }
+    if remain > 0 {
+        result.push(bytes[n] >> (8 - remain));
+    }
+    result
+}
+
+// incs(X)=MSBlen(X)-s(X) || [int(LSBs(X))+1 mod 2^s]s
+fn inc_32(bits: u128) -> u128 {
+    let msb = bits >> 32;
+    let mut lsb = (bits & 0xffffffff) as u32;
+    lsb = lsb.wrapping_add(1);
+    msb << 32 | lsb as u128
+}
+
+fn ghash(key: u128, messages: &[u128]) -> u128 {
+    let mut y = 0u128;
+    for i in 0..messages.len() {
+        let yi = gmul_128(y ^ messages[i], key);
+        y = yi;
+    }
+    y
+}
+
+impl GCM {
+    pub fn new(key: [u8; 16]) -> Self {
+        let key = GenericArray::from(key);
+        let aes = Aes128::new(&key);
+        Self {
+            aes,
+        }
+    }
+    fn ghash_key(&mut self) -> u128 {
+        let mut block = [0u8; 16];
+        let block = Block::<Aes128>::from_mut_slice(&mut block);
+        self.aes.encrypt_block(block);
+        u8to128(&block.as_slice())
+    }
+    pub fn gctr(&mut self, iv: u128, message: &[u8]) -> Vec<u8> {
+        // 如果X是空串, 则直接返回
+        if message.len() == 0 {
+            return vec![];
+        }
+        let mut output = vec![];
+        let mut cb = iv;
+        for chunk in message.chunks(16) {
+            if chunk.len() < 16 {
+                let mut bs = cb.to_be_bytes().clone();
+                let block = Block::<Aes128>::from_mut_slice(&mut bs);
+                self.aes.encrypt_block(block);
+                let b = {
+                    let mut b = [0u8; 16];
+                    for i in 0..16 {
+                        b[i] = block.as_slice()[i];
+                    }
+                    b
+                };
+                let msb = msb_s(chunk.len() * 8, b);
+                let y = u8to128(chunk) ^ u8to128(&msb);
+                output.extend_from_slice(&y.to_be_bytes()[16 - chunk.len()..16])
+            } else {
+                let mut bs = cb.to_be_bytes().clone();
+                let block = Block::<Aes128>::from_mut_slice(&mut bs);
+                self.aes.encrypt_block(block);
+                let y = u8to128(chunk) ^ u8to128(&block.as_slice());
+                output.extend_from_slice(&y.to_be_bytes());
+            }
+            // counter + 1
+            cb = inc_32(cb);
+        }
+        output
+    }
+    pub fn ae(&mut self, iv_bytes: &[u8], adata: &[u8], message: &[u8]) -> (Vec<u8>, Vec<u8>) {
+        let ghash_key = self.ghash_key();
+        let mut iv_padding = vec![];
+        let iv = u8to128(iv_bytes);
+        let j0 = match iv_bytes.len() == 12 {
+            true => {
+                iv << 32 | 0x00000001
+            }
+            false => {
+                // s = 128[len(iv) / 128] - len(iv)
+                let s = 128 * (((iv_bytes.len() * 8) + 128 - 1) / 128) - (iv_bytes.len() * 8);
+                iv_padding.push(iv << s);
+                iv_padding.push((iv_bytes.len() * 8) as u128);
+                ghash(ghash_key, &iv_padding)
+            }
+        };
+        let message_len = message.len() * 8;
+        let adata_len = adata.len() * 8;
+        let u = 128 * ((message_len + 128 - 1) / 128) - message_len;
+        let v = 128 * ((adata_len + 128 - 1) / 128) - adata_len;
+        // println!("u, v: {}, {}", u, v);
+        // println!("j0 = {:02x?}", j0);
+        let enc = self.gctr(inc_32(j0), &message);
+        let mut bit_string = Vec::<u8>::new();
+        bit_string.extend_from_slice(adata);
+        bit_string.extend_from_slice(&vec![0x00; v / 8]);
+        // 这里认证的是密文
+        bit_string.extend_from_slice(&enc);
+        bit_string.extend_from_slice(&vec![0x00; u / 8]);
+        bit_string.extend_from_slice(&(adata_len as u64).to_be_bytes());
+        bit_string.extend_from_slice(&(message_len as u64).to_be_bytes());
+        // println!("len = {}, bit_string[u8] = {:02x?}", bit_string.len(), bit_string);
+        let bit_string: Vec<u128> = bit_string.chunks(16).map(|it| u8to128(it)).collect();
+        //  println!("bit_string[u128] = {:02x?}", bit_string);
+        let s = ghash(ghash_key, &bit_string).to_be_bytes();
+        //println!("{:02x?}", s);
+        let tag = self.gctr(j0, &s);
+        // println!("tag = {:02x?}", tag);
+        // println!("enc = {:02x?}", enc);
+        (tag, enc)
+    }
+}
+
+// from: https://developer.aliyun.com/article/952809
+fn main() {
+    let key = [0u8; 16];
+    let nonce = [0u8; 12];
+    let plaintext = [0u8; 64];
+    let mut gcm = GCM::new(key);
+    let (tag, enc) = gcm.ae(&nonce, &[], &plaintext);
+
+    println!("{}", hex::encode(&enc));
+    println!("{}", hex::encode(&tag));
+
+    // ---------------------------------------------------------------------------------------
+
+    let key: &[u8; 16] = &[0; 16];
+    let key: &Key<Aes128Gcm> = key.into();
+    let cipher = Aes128Gcm::new(&key);
+
+    let mut nonce = Nonce::<Aes128Gcm>::default();
+    let m: &mut [u8] = nonce.as_mut();
+    for i in 0..m.len() {
+        m[i] = 0;
+    }
+    // println!("nonce\t:{}", hex::encode(nonce.as_slice()));
+
+    let ciphertext = cipher.encrypt(&nonce, plaintext.as_slice()).unwrap();
+    println!("{}", hex::encode(&ciphertext));
+    let mut ciphertext = vec![0u8; plaintext.len()];
+    let tag = cipher.encrypt_in_place_detached(&nonce, &[], ciphertext.as_mut_slice()).unwrap();
+    println!("{}", hex::encode(&ciphertext));
+    println!("{}", hex::encode(tag.as_slice()));
+
+    let mut ciphertext = plaintext.to_vec();
+    cipher.encrypt_in_place(&nonce, &[], &mut ciphertext).unwrap();
+    println!("{}", hex::encode(ciphertext.as_slice()));
+}
\ No newline at end of file