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GNU/Linux |
CentOS 2.1AS(Slurm) |
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dh(3ssl) |
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dh − Diffie-Hellman key agreement
#include <openssl/dh.h>
#include <openssl/engine.h>
DH * DH_new(void);
void DH_free(DH *dh);
int DH_size(DH *dh);
DH * DH_generate_parameters(int prime_len, int generator,
void (*callback)(int, int, void *), void *cb_arg);
int DH_check(DH *dh, int *codes);
int DH_generate_key(DH *dh);
int DH_compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh);
void DH_set_default_openssl_method(DH_METHOD *meth);
DH_METHOD *DH_get_default_openssl_method(void);
int DH_set_method(DH *dh, ENGINE *engine);
DH *DH_new_method(ENGINE *engine);
DH_METHOD *DH_OpenSSL(void);
int DH_get_ex_new_index(long argl, char *argp, int (*new_func)(),
int (*dup_func)(), void (*free_func)());
int DH_set_ex_data(DH *d, int idx, char *arg);
char *DH_get_ex_data(DH *d, int idx);
DH * d2i_DHparams(DH **a, unsigned char **pp, long length);
int i2d_DHparams(DH *a, unsigned char **pp);
int DHparams_print_fp(FILE *fp, DH *x);
int DHparams_print(BIO *bp, DH *x);
These functions implement the Diffie-Hellman key agreement protocol. The generation of shared DH parameters is described in DH_generate_parameters(3); DH_generate_key(3) describes how to perform a key agreement.
The DH structure consists of several BIGNUM components.
struct
{
BIGNUM *p; // prime number (shared)
BIGNUM *g; // generator of Z_p (shared)
BIGNUM *priv_key; // private DH value x
BIGNUM *pub_key; // public DH value g^x
// ...
};
DH
dhparam(1), bn(3), dsa(3), err(3), rand(3), rsa(3), DH_set_method(3), DH_new(3), DH_get_ex_new_index(3), DH_generate_parameters(3), DH_compute_key(3), d2i_DHparams(3), RSA_print(3)
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dh(3ssl) | |