Hi,
I need to use a 2048 RSA private key generated in C# for signing. What must the key meet if it is generated in C#, what parameters must it have?
Hi, just export the key in PKCS#1 format in C#
It looks like this, but in ASN.1, then base64 encoded:
// PKCS#1
// RSAPrivateKey ::= SEQUENCE {
// version Version,
// modulus INTEGER, -- n
// publicExponentINTEGER, -- e
// privateExponent INTEGER, -- d
// prime1INTEGER, -- p
// prime2INTEGER, -- q
// exponent1 INTEGER, -- d mod (p-1)
// exponent2 INTEGER, -- d mod (q-1)
// coefficient INTEGER, -- (inverse of q) mod p
// otherPrimeInfos OtherPrimeInfos OPTIONAL
// }
//
The generated file will start with -----BEGIN PRIVATE KEY----- and will be in base 64.
Then, import this in TMSCP using the TRSAEncryptSign class and procedure TRSAEncSign.FromPrivateKeyFile(KeyFile: string); // KeyFile is the full path of the PKCS#1 file created in C#
If the private key is password protected, don't forget to pass the password to the RSA object:
RSA := TRSAEncryptSign.Create;
RSA.passwd := 'your password';
RSA.FromPrivateKeyFile('YourFullKeyFilePath');
Regards,
bernard