What is the decryption demo method for java version
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1.
Join pom.xml
Org.bouncycastle
Bcprov-jdk15on
1.59
two。
Import com.alibaba.fastjson.JSONObject
Import com.sun.org.apache.xerces.internal.impl.dv.util.Base64
Import java.security.AlgorithmParameters
Import java.security.Security
Import java.util.Arrays
Import javax.crypto.Cipher
Import javax.crypto.spec.IvParameterSpec
Import javax.crypto.spec.SecretKeySpec
Import org.bouncycastle.jce.provider.BouncyCastleProvider
/ * *
*
* decryption method
, /
Public class SecretUtils {
Public static JSONObject unEncrypted (String encryptedData, String sessionKey, String iv) {
/ / encrypted data
Byte [] dataByte = Base64.decode (encryptedData)
/ / encryption key
Byte [] keyByte = Base64.decode (sessionKey)
/ / offset
Byte [] ivByte = Base64.decode (iv)
Try {
/ / if the key is less than 16 bits, then make it up. The content in this if is very important.
Int base = 16
If (keyByte.length% base! = 0) {
Int groups = keyByte.length / base + (keyByte.length% base! = 0? 1: 0)
Byte [] temp = new byte [groups * base]
Arrays.fill (temp, (byte) 0)
System.arraycopy (keyByte, 0, temp, 0, keyByte.length)
KeyByte = temp
}
/ / initialize
Security.addProvider (new BouncyCastleProvider ())
Cipher cipher = Cipher.getInstance ("AES/CBC/PKCS7Padding", "BC")
SecretKeySpec spec = new SecretKeySpec (keyByte, "AES")
AlgorithmParameters parameters = AlgorithmParameters.getInstance ("AES")
Parameters.init (new IvParameterSpec (ivByte))
Cipher.init (Cipher.DECRYPT_MODE, spec, parameters); / / initialize
Byte [] resultByte = cipher.doFinal (dataByte)
If (null! = resultByte & & resultByte.length > 0) {
String result = new String (resultByte, "UTF-8")
Return JSONObject.parseObject (result)
}
} catch (Exception e) {
E.printStackTrace ()
}
Return null
}
}
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