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HP Open Source Security for OpenVMS Volume 2: HP SSL for OpenVMS > CRYPTO Application
Programming Interface (API) Reference
rsa
NAMErsa — 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); DESCRIPTIONThese 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 TOSSL, PKCS #1 v2.0 PATENTSRSA was covered by a US patent which expired in September
2000. SEE ALSOrsa(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) |
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