Initializing help system before first use

RSAprivencrypt

Purpose
Encrypt a document using an RSA private key.
Synopsis
function RSAprivencrypt(kfile:string, src:string, dest:string):integer
Arguments
kfile 
File containing the private key
src 
Name of the file to encrypt
dst 
Name of the file to store the encrypted document
Return value
Length of the resulting document or -1 in the case of an error.
Further information
1. This function can be used to encrypt a document using an RSA private key (with PKCS1 as the padding algorithm). Decryption will be done using function RSApubdecrypt with the help of the corresponding RSA public key.
2. The algorithm used here cannot handle documents larger than (RSAgetkeysize(kfile)/8-11) bytes. It is usually used to generate a digital signature from a message digest.
Related topics
RSApubdecrypt, msgsign
Module
mmssl

Parent Topic Procedures and functions

© 2001-2025 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.