Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
rsa(3)				    OpenSSL				rsa(3)

NAME
       rsa - RSA public	key cryptosystem

SYNOPSIS
	#include <openssl/rsa.h>
	#include <openssl/engine.h>

	RSA * RSA_new(void);
	void RSA_free(RSA *rsa);

	int RSA_public_encrypt(int flen, unsigned char *from,
	   unsigned char *to, RSA *rsa,	int padding);
	int RSA_private_decrypt(int flen, unsigned char	*from,
	   unsigned char *to, RSA *rsa,	int padding);
	int RSA_private_encrypt(int flen, unsigned char	*from,
	   unsigned char *to, RSA *rsa,int padding);
	int RSA_public_decrypt(int flen, unsigned char *from,
	   unsigned char *to, RSA *rsa,int padding);

	int RSA_sign(int type, unsigned	char *m, unsigned int m_len,
	   unsigned char *sigret, unsigned int *siglen,	RSA *rsa);
	int RSA_verify(int type, unsigned char *m, unsigned int	m_len,
	   unsigned char *sigbuf, unsigned int siglen, RSA *rsa);

	int RSA_size(const RSA *rsa);

	RSA *RSA_generate_key(int num, unsigned	long e,
	   void	(*callback)(int,int,void *), void *cb_arg);

	int RSA_check_key(RSA *rsa);

	int RSA_blinding_on(RSA	*rsa, BN_CTX *ctx);
	void RSA_blinding_off(RSA *rsa);

	void RSA_set_default_method(const RSA_METHOD *meth);
	const RSA_METHOD *RSA_get_default_method(void);
	int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
	const RSA_METHOD *RSA_get_method(const RSA *rsa);
	RSA_METHOD *RSA_PKCS1_SSLeay(void);
	RSA_METHOD *RSA_null_method(void);
	int RSA_flags(const RSA	*rsa);
	RSA *RSA_new_method(ENGINE *engine);

	int RSA_print(BIO *bp, RSA *x, int offset);
	int RSA_print_fp(FILE *fp, RSA *x, int offset);

	int RSA_get_ex_new_index(long argl, char *argp,	int (*new_func)(),
	   int (*dup_func)(), void (*free_func)());
	int RSA_set_ex_data(RSA	*r,int idx,char	*arg);
	char *RSA_get_ex_data(RSA *r, int idx);

	int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char	*m,
	   unsigned int	m_len, unsigned	char *sigret, unsigned int *siglen,
	   RSA *rsa);
	int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
	   unsigned int	m_len, unsigned	char *sigbuf, unsigned int siglen,
	   RSA *rsa);

DESCRIPTION
       These functions implement RSA public key	encryption and signatures as
       defined in PKCS #1 v2.0 [RFC 2437].

       The RSA structure consists of several BIGNUM components.	It can contain
       public as well as private RSA keys:

	struct
	       {
	       BIGNUM *n;	       // public modulus
	       BIGNUM *e;	       // public exponent
	       BIGNUM *d;	       // private exponent
	       BIGNUM *p;	       // secret prime factor
	       BIGNUM *q;	       // secret prime factor
	       BIGNUM *dmp1;	       // d mod	(p-1)
	       BIGNUM *dmq1;	       // d mod	(q-1)
	       BIGNUM *iqmp;	       // q^-1 mod p
	       // ...
	       };
	RSA

       In public keys, the private exponent and	the related secret values are
       NULL.

       p, q, dmp1, dmq1	and iqmp may be	NULL in	private	keys, but the RSA
       operations are much faster when these values are	available.

       Note that RSA keys may use non-standard RSA_METHOD implementations,
       either directly or by the use of	ENGINE modules.	In some	cases (eg. an
       ENGINE providing	support	for hardware-embedded keys), these BIGNUM
       values will not be used by the implementation or	may be used for
       alternative data	storage. For this reason, applications should
       generally avoid using RSA structure elements directly and instead use
       API functions to	query or modify	keys.

CONFORMING TO
       SSL, PKCS #1 v2.0

PATENTS
       RSA was covered by a US patent which expired in September 2000.

SEE ALSO
       rsa(1), bn(3), dsa(3), dh(3), rand(3), engine(3), RSA_new(3),
       RSA_public_encrypt(3), RSA_sign(3), RSA_size(3),	RSA_generate_key(3),
       RSA_check_key(3), RSA_blinding_on(3), RSA_set_method(3),	RSA_print(3),
       RSA_get_ex_new_index(3),	RSA_private_encrypt(3),
       RSA_sign_ASN1_OCTET_STRING(3), RSA_padding_add_PKCS1_type_1(3)

1.0.1e				  2013-02-11				rsa(3)

NAME | SYNOPSIS | DESCRIPTION | CONFORMING TO | PATENTS | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=rsa&sektion=3&manpath=FreeBSD+10.0-RELEASE>

home | help