ft_rsa

Simple crypto library. RSA, ASN.1, PEM, DER, DES, Base64, SHAx, MD5

About

The goals of this project:

• Big number
• Pseudo-random number generator
• Password based key derivation
• RSA key generation
• RSA crypt
• RSA utilities
• DES crypt
• Message digest
• Base64 encoding
• ASN.1 parser
• DER encoding
• PEM encoding
• JSON parser
• I/O streams
• CLI argument parser
• Text parser
• Logger

Usage

./ft_ssl -h

Usage examples

Generate RSA private key:

./ft_ssl genrsa -o <key> 2048

Check RSA key and print its components:

./ft_ssl rsa -in <key> -check -text -noout

Encrypt message using RSA algorithm:

./ft_ssl rsautl -in <message> -out <cipher> -inkey <key>

References

• LibTomMath, Multi-Precision Math: Tom St Denis, Mads Rasmussen, Greg Rose
• ITU-T X.660: General procedures and top arcs of the international object identifier tree
• ITU-T X.690: Abstract Syntax Notation One (ASN.1)
• FIPS 180-4: Secure Hash Standard
• FIPS 186-4: Digital Signature Standard
• RFC 5280: Internet X.509 Public Key Infrastructure Certificate
• RFC 3447: PKCS #1: RSA Cryptography Specifications Version 2.1
• RFC 8017: PKCS #1: RSA Cryptography Specifications Version 2.2
• RFC 5208: PKCS #8: Private-Key Information Syntax Specification Version 1.2
• RFC 5958: Asymmetric Key Packages
• RFC 7468: Textual Encodings of PKIX, PKCS, and CMS Structures
• RFC 6234: US Secure Hash Algorithms (SHA and SHA-based HMAC and HKDF)
• RFC 1321: The MD5 Message-Digest Algorithm
• FIPS 46-3: Data Encryption Standard (DES)
• RFC 1829: The ESP DES-CBC Transform