include/beecrypt/rsa.h File Reference

RSA algorithm. More...

#include "beecrypt/rsakp.h"

Include dependency graph for rsa.h:

Go to the source code of this file.

Functions
int	rsapub (const mpbarrett *n, const mpnumber *e, const mpnumber *m, mpnumber *c)
	This function performs a raw RSA public key operation.
int	rsapri (const mpbarrett *n, const mpnumber *d, const mpnumber *c, mpnumber *m)
	This function performs a raw RSA private key operation.
int	rsapricrt (const mpbarrett *n, const mpbarrett *p, const mpbarrett *q, const mpnumber *dp, const mpnumber *dq, const mpnumber *qi, const mpnumber *c, mpnumber *m)
	This function performs a raw RSA private key operation, with application of the Chinese Remainder Theorem.
int	rsavrfy (const mpbarrett *n, const mpnumber *e, const mpnumber *m, const mpnumber *c)
	This function performs a raw RSA verification.

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Detailed Description

RSA algorithm.

Author:

Bob Deblier <bob.deblier@telenet.be>

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Function Documentation

int rsapri	(	const mpbarrett *	n,
		const mpnumber *	d,
		const mpnumber *	c,
		mpnumber *	m
	)

This function performs a raw RSA private key operation.

This function can be used for decryption and signing.

It performs the operation:

• 

Parameters:

	n	The modulus.
	d	The private exponent.
	c	The ciphertext.
	m	The message.

Return values:

	0	on success.
	-1	on failure.

int rsapricrt	(	const mpbarrett *	n,
		const mpbarrett *	p,
		const mpbarrett *	q,
		const mpnumber *	dp,
		const mpnumber *	dq,
		const mpnumber *	qi,
		const mpnumber *	c,
		mpnumber *	m
	)

This function performs a raw RSA private key operation, with application of the Chinese Remainder Theorem.

It performs the operation:

• 
• 
• 
• 

Parameters:

	n	The modulus.
	p	The first prime factor.
	q	The second prime factor.
	dp	The private exponent d mod (p-1).
	dq	The private exponent d (q-1).
	qi	The inverse of q mod p.
	c	The ciphertext.
	m	The message.

Return values:

	0	on success.
	-1	on failure.

int rsapub	(	const mpbarrett *	n,
		const mpnumber *	e,
		const mpnumber *	m,
		mpnumber *	c
	)

This function performs a raw RSA public key operation.

This function can be used for encryption and verifying.

It performs the following operation:

• 

Parameters:

	n	The RSA modulus.
	e	The RSA public exponent.
	m	The message.
	c	The ciphertext.

Return values:

	0	on success.
	-1	on failure.

int rsavrfy	(	const mpbarrett *	n,
		const mpnumber *	e,
		const mpnumber *	m,
		const mpnumber *	c
	)

This function performs a raw RSA verification.

It verifies if ciphertext c was encrypted from cleartext m with the private key matching the given public key (n, e).

Parameters:

	n	The modulus.
	e	The public exponent.
	m	The cleartext message.
	c	The ciphertext message.

Return values:

	1	on success.
	0	on failure.