我正在尝试使用BouncyCastle来加密使用PKCS 7文件标准的文件 . 这是我输出p7m文件的代码 . 当我去解密文件(使用Entrust)时,系统会提示我输入密钥存储区密码,因此它知道该文件是使用AES 128为我加密的,但它无法解密文件正文 . 加密时必须出错 .
byte[] fileContent = readFile(filename);
FileStream outStream = null;
Stream cryptoStream = null;
BinaryWriter binWriter = null;
try
{
CmsEnvelopedDataStreamGenerator dataGenerator = new CmsEnvelopedDataStreamGenerator();
dataGenerator.AddKeyTransRecipient(cert); //cert is the user's x509cert that i am encrypting for
outStream = new FileStream(filename + ".p7m", FileMode.Create);
cryptoStream = dataGenerator.Open(outStream, CmsEnvelopedGenerator.Aes128Cbc);
binWriter = new BinaryWriter(cryptoStream);
binWriter.Write(fileContent);
}
当我尝试使用BouncyCastle解密文件时,我将文件内容传递给CMSEnveloped对象时出现此错误:
IOException converting stream to byte array: Attempted to read past the end of the stream.
有什么想法在这里发生?
1 回答
我使用EnvelopedCMS类来完成此任务 .
http://msdn.microsoft.com/en-us/library/bb924575(VS.90).aspx