The crypto rsa library

Overview

The rsa library implements RSA encryption as specified in PKCS #1 and RFC 8017. The original specification for encryption and signatures with RSA is PKCS #1 and the terms "RSA encryption" and "RSA signatures" by default refer to PKCS #1 version 1.5. However, that specification has flaws and new designs should use version 2, usually called by just OAEP and PSS, where possible.

Types

GenerateKey = struct (bits int)

The data to pass to get ... from to generate a key.

PublicKey = struct (modulus Int, exponent int)

A public key/

PrivateKey = struct (publicKey PublicKey, exponent Int, primeA Int, primeB Int)

A private key.

EncryptOaep = struct (publicKey PublicKey, plaintext string, oaepLabel string)

The data to pass to get ... from to get OAEP-encrypted text.

EncryptPkcs = struct (publicKey PublicKey, plaintext string)

The data to pass to get ... from to get PKCS-encrypted text.

Commands

get(x ref) from (gk GenerateKey)

Populates the reference variable with a private key.

get(x ref) from (e EncryptOaep)

Gets the ciphertext from the plaintext using OAEP.

get(x ref) from (e EncryptPkcs)

Gets the ciphertext from the plaintext using PKCS.

Functions

EncryptOaep(key PublicKey, plaintext string)

Constructor for EncryptOaep defaulting to "" for the label.

decryptOaep(k PrivateKey, ciphertext string) -> string / error

Decrypts an OAEP-encoded cyphertext into plaintext, with the OEAP label taken to be "".

decryptOaep(k PrivateKey, ciphertext string, oaepLabel string) -> string / error

Decrypts an OAEP-encoded cyphertext into plaintext.

decryptPkcs(k PrivateKey, ciphertext string) -> string / error

Decrypts a PKCS-encoded cyphertext into plaintext.

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