RSA sign file question

[Jessica Wei]

Hi,   The RSA test cases in cryptest failed for me. Could somebody know what happened?   try 1:   //generate key pair cryptest g Key length in bits: 1024   Save private key to file: prv.txt   Save public key to file: pub.txt   Random Seed: 123456789   //encrypt using private key cryptest rs priv.txt message.txt out.txt   CryptoPP::Exception caught: PK_Signer: key too short for this signature scheme   try 2:   //generate key pair cryptest g Key length in bits: 1024   Save private key to file: prv.dat   Save public key to file: pub.dat   Random Seed: 34567891234   //encrypt using private key cryptest rs prv.dat message.txt out.txt   CryptoPP::Exception caught: NullRNG: NullRNG should only be passed to functions that don't need to generate random bytes     When I generate key pair, is there any requirment for key length and seed?   Thank for help.   Jessica