Hello all,
my problem:
1. I have been given a certificate in a pfx form that contains the
private key I must use to decode a message.
2. I opened up the certificate and saved the private key data to
a .pem file.
3. The certificate is in the form:
-----BEGIN CERTIFICATE-----
MIICuzCCAiSgAwIBAgIJAMLZ1aXsvPdqMA0GCSqGSIb3DQEBBQUAMGkxCzAJBgNV
(...)
/9kfj2B6h78n9yXo339Xa8i/+3xJQMApR5yXW0IkEg==
-----END CERTIFICATE-----
I went through the examples and found the cool function
string RSADecryptString(const char *privFilename, const char
*ciphertext)
I tried to use it, but I am getting a "BER decode error".
{
string b64decoded;
//decode file from bsae 64
StringSource( privFilename, true,
new CryptoPP::Base64Decoder(
new CryptoPP::StringSink( b64decoded )
) // Base64Encoder
); // StringSource
//Set up the decryptor
StringSource priv_key(b64decoded, true, new HexDecoder);
RSAES_OAEP_SHA_Decryptor priv(priv_key);
//to replace GlobalRNG that I haver no idea where it is!
AutoSeededRandomPool rng;
string result;
StringSource(ciphertext, true, new HexDecoder(new
PK_DecryptorFilter(rng, priv, new StringSink(result))));
return result;
}
Sorry for the dumb question, but I'm learning about cryptography as I
go and my time is running short for going through the cryptoPP API's
thoroughly.
I hope that someone can help me out.
Thanks in advance!
Cheers
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