23 lines
748 B
Markdown
23 lines
748 B
Markdown
# sm4-gcm
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PENGING...
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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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