dh man page on SmartOS

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dh(3)				    OpenSSL				 dh(3)

       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(const DH *dh);

	DH *   DH_generate_parameters(int prime_len, int generator,
		       void (*callback)(int, int, void *), void *cb_arg);
	int    DH_check(const 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_method(const DH_METHOD *meth);
	const DH_METHOD *DH_get_default_method(void);
	int DH_set_method(DH *dh, const DH_METHOD *meth);
	DH *DH_new_method(ENGINE *engine);
	const 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(const DH *a, unsigned char **pp);

	int    DHparams_print_fp(FILE *fp, const DH *x);
	int    DHparams_print(BIO *bp, const 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.

	       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
	       // ...

       Note that DH keys may use non-standard DH_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 DH structure elements directly and instead use
       API functions to query or modify keys.

       dhparam(1), bn(3), dsa(3), err(3), rand(3), rsa(3), engine(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),

1.0.1g				  2014-03-17				 dh(3)

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