/home/dko/projects/mobilec/trunk/src/security/xyssl-0.7/library/rsa.c File Reference

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "xyssl/rsa.h"

Go to the source code of this file.

Defines
#define	_CRT_SECURE_NO_DEPRECATE   1
Functions
int	rsa_gen_key (rsa_context *ctx, int nbits, int exponent, int(*rng_f)(void *), void *rng_d)
	Generate an RSA keypair.
int	rsa_read_public (rsa_context *ctx, FILE *f)
	Read the public key from a file.
int	rsa_read_private (rsa_context *ctx, FILE *f)
	Read the private key from a file.
int	rsa_write_public (rsa_context *ctx, FILE *f)
	Write the public key into a file.
int	rsa_write_private (rsa_context *ctx, FILE *f)
	Write the private key into a file.
int	rsa_public (rsa_context *ctx, unsigned char *input, int ilen, unsigned char *output, int olen)
	Perform an RSA public key operation.
int	rsa_private (rsa_context *ctx, unsigned char *input, int ilen, unsigned char *output, int olen)
	Perform an RSA private key operation.
int	rsa_check_pubkey (rsa_context *ctx)
	Return 0 if the public key is valid, or ERR_RSA_KEY_CHECK_FAILED.
int	rsa_check_privkey (rsa_context *ctx)
	Return 0 if the private key is valid, or ERR_RSA_KEY_CHECK_FAILED.
int	rsa_pkcs1_encrypt (rsa_context *ctx, unsigned char *input, int ilen, unsigned char *output, int olen)
	Add the PKCS#1 v1.5 padding and do a public RSA.
int	rsa_pkcs1_decrypt (rsa_context *ctx, unsigned char *input, int ilen, unsigned char *output, int *olen)
	Do a private RSA, removes the PKCS#1 v1.5 padding.
int	rsa_pkcs1_sign (rsa_context *ctx, int alg_id, unsigned char *hash, int hashlen, unsigned char *sig, int siglen)
	Perform a private RSA to sign a message digest.
int	rsa_pkcs1_verify (rsa_context *ctx, int alg_id, unsigned char *hash, int hashlen, unsigned char *sig, int siglen)
	Perform a public RSA and check the message digest.
void	rsa_free (rsa_context *ctx)
	Free the components of an RSA key.
int	rsa_self_test (int verbose)
	Checkup routine.

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Define Documentation

#define _CRT_SECURE_NO_DEPRECATE   1

Definition at line 28 of file rsa.c.

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Function Documentation

int rsa_check_privkey

(

rsa_context *

ctx

)

Return 0 if the private key is valid, or ERR_RSA_KEY_CHECK_FAILED.

Definition at line 326 of file rsa.c.

References CHK, rsa_context::E, ERR_RSA_KEY_CHK_FAILED, mpi_cmp_int(), mpi_cmp_mpi(), mpi_free(), mpi_gcd(), mpi_init(), mpi_mul_mpi(), mpi_sub_int(), rsa_context::N, rsa_context::P, and rsa_context::Q.

Referenced by x509_parse_key().

int rsa_check_pubkey

(

rsa_context *

ctx

)

Return 0 if the public key is valid, or ERR_RSA_KEY_CHECK_FAILED.

Definition at line 306 of file rsa.c.

References rsa_context::E, ERR_RSA_KEY_CHK_FAILED, mpi_msb(), rsa_context::N, and mpi::p.

Referenced by x509_add_certs().

void rsa_free

(

rsa_context *

ctx

)

Free the components of an RSA key.

Definition at line 569 of file rsa.c.

References rsa_context::D, rsa_context::DP, rsa_context::DQ, rsa_context::E, mpi_free(), rsa_context::N, rsa_context::P, rsa_context::Q, rsa_context::QP, rsa_context::RN, rsa_context::RP, and rsa_context::RQ.

Referenced by main(), rsa_gen_key(), rsa_read_private(), rsa_read_public(), x509_free_cert(), and x509_parse_key().

int rsa_gen_key	(	rsa_context *	ctx,
		int	nbits,
		int	exponent,
		int(*)(void *)	rng_f,
		void *	rng_d
	)

Generate an RSA keypair.

Parameters:

	ctx	RSA context to be initialized
	nbits	size of the public key in bits
	exponent	public exponent (e.g., 65537)
	rng_f	points to the RNG function
	rng_d	points to the RNG data

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 41 of file rsa.c.

References CHK, rsa_context::D, rsa_context::DP, rsa_context::DQ, rsa_context::E, ERR_RSA_BAD_INPUT_DATA, ERR_RSA_KEY_GEN_FAILED, rsa_context::len, mpi_cmp_int(), mpi_cmp_mpi(), mpi_free(), mpi_gcd(), mpi_gen_prime(), mpi_init(), mpi_inv_mod(), mpi_lset(), mpi_mod_mpi(), mpi_msb(), mpi_mul_mpi(), mpi_sub_int(), mpi_swap(), rsa_context::N, rsa_context::P, rsa_context::Q, rsa_context::QP, and rsa_free().

Referenced by main().

int rsa_pkcs1_decrypt	(	rsa_context *	ctx,
		unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int *	olen
	)

Do a private RSA, removes the PKCS#1 v1.5 padding.

Parameters:

	ctx	RSA context
	input	buffer holding the encrypted data
	ilen	must be the same as the modulus size
	output	buffer that will hold the plaintext
	olen	size of output buffer, will be updated to contain the length of the plaintext

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 385 of file rsa.c.

References ERR_RSA_BAD_INPUT_DATA, ERR_RSA_INVALID_PADDING, int, rsa_context::len, RSA_CRYPT, and rsa_private().

Referenced by ssl_parse_client_key_exchange().

int rsa_pkcs1_encrypt	(	rsa_context *	ctx,
		unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int	olen
	)

Add the PKCS#1 v1.5 padding and do a public RSA.

Parameters:

	ctx	RSA context
	input	buffer holding the data to be encrypted
	ilen	length of the plaintext; cannot be longer than the modulus, minus 3+8 for padding
	output	buffer that will hold the ciphertext
	olen	must be the same as the modulus size (for example, 128 if RSA-1024 is used)

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 355 of file rsa.c.

References ERR_RSA_BAD_INPUT_DATA, rsa_context::len, RSA_CRYPT, and rsa_public().

Referenced by ssl_write_client_key_exchange().

int rsa_pkcs1_sign	(	rsa_context *	ctx,
		int	alg_id,
		unsigned char *	hash,
		int	hashlen,
		unsigned char *	sig,
		int	siglen
	)

Perform a private RSA to sign a message digest.

Parameters:

	ctx	RSA context
	alg_id	RSA_RAW, RSA_MD2/4/5 or RSA_SHA1
	hash	buffer holding the message digest
	hashlen	message digest length
	sig	buffer that will hold the ciphertext
	siglen	must be the same as the modulus size (for example, 128 if RSA-1024 is used)

Returns:

0 if the signing operation was successful, or an ERR_RSA_XXX error code

Definition at line 423 of file rsa.c.

References ASN1_HASH_MDX, ASN1_HASH_SHA1, ERR_RSA_BAD_INPUT_DATA, rsa_context::len, RSA_MD2, RSA_MD4, RSA_MD5, rsa_private(), RSA_RAW, RSA_SHA1, and RSA_SIGN.

Referenced by main(), ssl_write_certificate_verify(), and ssl_write_server_key_exchange().

int rsa_pkcs1_verify	(	rsa_context *	ctx,
		int	alg_id,
		unsigned char *	hash,
		int	hashlen,
		unsigned char *	sig,
		int	siglen
	)

Perform a public RSA and check the message digest.

Parameters:

	ctx	points to an RSA public key
	alg_id	RSA_RAW, RSA_MD2/4/5 or RSA_SHA1
	hash	buffer holding the message digest
	hashlen	message digest length
	sig	buffer holding the ciphertext
	siglen	must be the same as the modulus size

Returns:

0 if the verify operation was successful, or an ERR_RSA_XXX error code

Definition at line 499 of file rsa.c.

References ASN1_HASH_MDX, ASN1_HASH_SHA1, ERR_RSA_BAD_INPUT_DATA, ERR_RSA_INVALID_PADDING, ERR_RSA_VERIFY_FAILED, int, rsa_context::len, RSA_MD2, RSA_MD4, RSA_MD5, rsa_public(), RSA_RAW, RSA_SHA1, and RSA_SIGN.

Referenced by main(), ssl_parse_certificate_verify(), ssl_parse_server_key_exchange(), and x509_verify_cert().

int rsa_private	(	rsa_context *	ctx,
		unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int	olen
	)

Perform an RSA private key operation.

Returns:

0 if successful, or an ERR_RSA_XXX error code

Note:

This function does not take care of message padding: both ilen and olen must be equal to the modulus size (ctx->len). Also, be sure to set input[0] = 0.

Definition at line 245 of file rsa.c.

References CHK, rsa_context::D, rsa_context::DP, rsa_context::DQ, ERR_RSA_BAD_INPUT_DATA, ERR_RSA_PRIVATE_FAILED, rsa_context::len, mpi_add_mpi(), mpi_cmp_mpi(), mpi_exp_mod(), mpi_free(), mpi_init(), mpi_mod_mpi(), mpi_mul_mpi(), mpi_read_binary(), mpi_sub_mpi(), mpi_write_binary(), rsa_context::N, rsa_context::P, rsa_context::Q, rsa_context::QP, rsa_context::RN, rsa_context::RP, and rsa_context::RQ.

Referenced by main(), rsa_pkcs1_decrypt(), and rsa_pkcs1_sign().

int rsa_public	(	rsa_context *	ctx,
		unsigned char *	input,
		int	ilen,
		unsigned char *	output,
		int	olen
	)

Perform an RSA public key operation.

Returns:

0 if successful, or an ERR_RSA_XXX error code

Note:

This function does not take care of message padding: both ilen and olen must be equal to the modulus size (ctx->len). Also, be sure to set input[0] = 0.

Definition at line 209 of file rsa.c.

References CHK, rsa_context::E, ERR_RSA_BAD_INPUT_DATA, ERR_RSA_PUBLIC_FAILED, rsa_context::len, mpi_cmp_mpi(), mpi_exp_mod(), mpi_free(), mpi_init(), mpi_read_binary(), mpi_write_binary(), rsa_context::N, and rsa_context::RN.

Referenced by main(), rsa_pkcs1_encrypt(), and rsa_pkcs1_verify().

int rsa_read_private	(	rsa_context *	ctx,
		FILE *	f
	)

Read the private key from a file.

Parameters:

	ctx	RSA context to be initialized
	f	Handle of the source file

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 136 of file rsa.c.

References CHK, rsa_context::D, rsa_context::DP, rsa_context::DQ, rsa_context::E, ERR_RSA_KEY_RD_FAILED, rsa_context::len, mpi_msb(), mpi_read_file(), rsa_context::N, rsa_context::P, rsa_context::Q, rsa_context::QP, and rsa_free().

Referenced by main().

int rsa_read_public	(	rsa_context *	ctx,
		FILE *	f
	)

Read the public key from a file.

Parameters:

	ctx	RSA context to be initialized
	f	Handle of the source file

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 111 of file rsa.c.

References CHK, rsa_context::E, ERR_RSA_KEY_RD_FAILED, rsa_context::len, mpi_msb(), mpi_read_file(), rsa_context::N, and rsa_free().

Referenced by main().

int rsa_self_test

(

int

verbose

)

Checkup routine.

Returns:

0 if successful, or 1 if the test failed

Definition at line 683 of file rsa.c.

Referenced by main().

int rsa_write_private	(	rsa_context *	ctx,
		FILE *	f
	)

Write the private key into a file.

Parameters:

	ctx	RSA context holding the key
	f	Handle of the destination file

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 185 of file rsa.c.

References CHK, rsa_context::D, rsa_context::DP, rsa_context::DQ, rsa_context::E, ERR_RSA_KEY_WR_FAILED, mpi_write_file(), rsa_context::N, rsa_context::P, rsa_context::Q, and rsa_context::QP.

Referenced by main().

int rsa_write_public	(	rsa_context *	ctx,
		FILE *	f
	)

Write the public key into a file.

Parameters:

	ctx	RSA context holding the key
	f	Handle of the destination file

Returns:

0 if successful, or an ERR_RSA_XXX error code

Definition at line 167 of file rsa.c.

References CHK, rsa_context::E, ERR_RSA_KEY_WR_FAILED, mpi_write_file(), and rsa_context::N.

Referenced by main().

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