AES简单解密
解密 简单 AES
2023-09-14 08:58:57 时间
某app返回内容进行了加密处理
其本地解密实现如下
@NotNull public final String decrypt(@NotNull String str, @NotNull String str2) { Intrinsics.checkParameterIsNotNull(str, "input"); Intrinsics.checkParameterIsNotNull(str2, "key"); Cipher instance = Cipher.getInstance("AES/CBC/NoPadding"); Object bytes = str2.getBytes(Charsets.UTF_8); Intrinsics.checkExpressionValueIsNotNull(bytes, "(this as java.lang.String).getBytes(charset)"); SecretKeySpec secretKeySpec = new SecretKeySpec(bytes, "AES"); Object bytes2 = str2.getBytes(Charsets.UTF_8); Intrinsics.checkExpressionValueIsNotNull(bytes2, "(this as java.lang.String).getBytes(charset)"); instance.init(2, secretKeySpec, new IvParameterSpec(bytes2)); Object doFinal = instance.doFinal(Base64.decode(str, 0)); Intrinsics.checkExpressionValueIsNotNull(doFinal, "encrypt"); return StringsKt.trim(new String(doFinal, Charsets.UTF_8), new char[]{'\u0000'}); }
key值为一个写死的字符串
参数有两个 str //加密后的字符串 str2 //解密需要的 key
另偏移向量为 str2 utf8 的字节数组
实现如下
function decrypt($str, $key) { if([string]::IsNullOrEmpty($str)){return $null} $toEncryptArray=[Convert]::FromBase64String($str) $ivArray=[Text.Encoding]::UTF8.GetBytes($key) $rm=[System.Security.Cryptography.RijndaelManaged]::new() $rm.Key=[Text.Encoding]::UTF8.GetBytes($key) $rm.IV=$ivArray $rm.Mode=[System.Security.Cryptography.CipherMode]::CBC $rm.Padding=[System.Security.Cryptography.PaddingMode]::None $cTransform=$rm.CreateDecryptor() $resultArray=$cTransform.TransformFinalBlock($toEncryptArray,0,$toEncryptArray.length) return [Text.Encoding]::UTF8.GetString($resultArray).Trim() }