package com.ots.project.tool.exam;
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import org.apache.commons.codec.DecoderException;
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import org.apache.commons.codec.binary.Base64;
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import org.apache.commons.codec.binary.Hex;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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public class DecryptUtil {
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public static byte[] AES_CBC_Decrypt(byte[] data, byte[] key, byte[] iv) throws Exception{
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Cipher cipher = getCipher(Cipher.DECRYPT_MODE, key, iv);
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return cipher.doFinal(data);
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}
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private static Cipher getCipher(int mode, byte[] key, byte[] iv) throws Exception{
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
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cipher.init(mode, secretKeySpec, new IvParameterSpec(iv));
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return cipher;
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}
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public static void main(String[] args) throws Exception {
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byte[] bytes = "db2139561c9fe068".getBytes();
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String base64Str = Base64.encodeBase64String(bytes);
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System.out.println(base64Str);
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String crypto = "34439a96e68b129093105b67de81c0fc";
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byte[] data = Hex.decodeHex(crypto.toCharArray());
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byte[] s = AES_CBC_Decrypt(data, bytes, bytes);
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System.out.println(new String(s));
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}
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}
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