40 lines
1.3 KiB
Markdown
40 lines
1.3 KiB
Markdown
# sm4-gcm
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Encrypt & Decrypt test code:
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```rust
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fn main() {
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let key = Sm4Key([0u8; 16]);
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let nonce = [0u8; 12];
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let plaintext = b"Hello World!";
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let ciphertext = sm4_gcm::sm4_gcm_encrypt(&key, &nonce, plaintext);
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println!("Encrypted: {}", hex::encode(&ciphertext));
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let decrypted = sm4_gcm::sm4_gcm_decrypt(&key, &nonce, &ciphertext).unwrap();
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println!("Decrypted: {}", String::from_utf8_lossy(&decrypted));
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}
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```
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Generate test vector BC test code:
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```java
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public static void encryptGcmNoPadding(String key, String data, String nonce, String associatedData) throws Exception {
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Cipher cipher = Cipher.getInstance("SM4/GCM/NoPadding", BouncyCastleProvider.PROVIDER_NAME);
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Key sm4Key = new SecretKeySpec(Bytes.fromHex(key).bytes(), "SM4");
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byte[] iv = Bytes.fromHex(nonce).bytes();
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GCMParameterSpec s = new GCMParameterSpec(128, iv);
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cipher.init(Cipher.ENCRYPT_MODE, sm4Key, s);
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if (associatedData != null && associatedData.length() > 0) {
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cipher.updateAAD(Bytes.fromHex(associatedData).bytes());
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}
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byte[] aa = cipher.doFinal(data.getBytes(StandardCharsets.UTF_8));
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System.out.println(Bytes.from(aa).asHex());
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}
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```
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Benchmark @MacBook Pro (Retina, 15-inch, Late 2013/2 GHz Quad-Core Intel Core i7)
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```text
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$ cargo run --release --example bench
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SM4/GCM encrypt : 65.69 M/s
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```
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