[英]AES file encryption with .Net Framework and decrypt it with IOS
We encrypt PDFs using AESManaged algorithm implemented in .NET framework. 我们使用.NET框架中实现的AESManaged算法对PDF进行加密。 I used the example explained in here to implement C# code to encrypt the file. 我使用此处说明的示例来实现C#代码来加密文件。 Now I need to decrypt that file using an iPhone application.(That is the requirement). 现在,我需要使用iPhone应用程序解密该文件。(这是必需的)。 So I use the this code to do that but decryption failed by returning an error. 因此,我使用此代码执行此操作,但是由于返回错误,解密失败。
'Error Domain=CommonCryptoErrorDomain Code=-4304 "Decode Error" UserInfo=0x127356c0 {NSLocalizedFailureReason=Input data did not decode or decrypt correctly, NSLocalizedDescription=Decode Error' '错误域= CommonCryptoErrorDomain代码= -4304“解码错误” UserInfo = 0x127356c0 {NSLocalizedFailureReason =输入数据未正确解码或解密,NSLocalizedDescription =解码错误'
Can some one help me to resolve this issue. 有人可以帮我解决这个问题吗?
We use 12345678 as encryption key. 我们使用12345678作为加密密钥。
最可能的问题是从密码派生实际密钥(12345678不能直接是AES密钥-只有8个字节)。
Technically this should work though I've never tested it, both methods uses the same ad-hoc format. 从技术上讲,这应该可以工作,尽管我从未测试过,这两种方法都使用相同的即席格式。
Encrypt using my authenticated encryption example . 使用经过身份验证的加密示例进行加密。
//use your secret data you want to encrypt instead.
String secretMessage = "Message";
var rnCryptorHeader = new Byte[]{
2, //RNCryptor Format version 2
0 //RNCryptor Uses password
};
//encryptedString is base64 encoded
var encryptedString = AESThenHMAC.SimpleEncryptWithPassword(secretMessage,
password:"1234567891011",
nonSecretPayload:rnCryptorHeader);
Then Decrypt using RNCryptor and NSData+Base64 for IOS 然后使用RNCryptor和NSData + Base64 for IOS解密
//This is the encrypted data passed from .net
NSString *encryptedString = @"AgE8C9E7gsfyOAmSotIOgyLQ0O6mdcuMXXjN/iZa3azym4KVWZAkfykIP6mqMt/qkpfftdB3XQhMkoxtQEM+rA0iHxOvZiNlmA2KJtg6BOnmlg==";
NSData *encryptedData = [NSData dataFromBase64String: encryptedString];
NSError *error;
NSData *decryptedData = [RNDecryptor decryptData:encryptedData
withPassword:@"1234567891011"
error:&error];
NSString *secretMessage = [[[NSString alloc] initWithData:decryptedData
encoding:NSUTF8StringEncoding] autorelease];
Since you aren't dealing with strings and are dealing with bytes directly, just remove the Base64 and utf8 encoding/decoding from this objective-c example and the linked c# example, once you are sure this is working. 由于您不是在处理字符串而是在直接处理字节,因此,只要确定能正常工作,就从此Objective-c示例和链接的c#示例中删除Base64和utf8编码/解码。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.