123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869 |
- =pod
- =head1 NAME
- dh - Diffie-Hellman key agreement
- =head1 SYNOPSIS
- #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);
- =head1 DESCRIPTION
- These functions implement the Diffie-Hellman key agreement protocol.
- The generation of shared DH parameters is described in
- L<DH_generate_parameters(3)|DH_generate_parameters(3)>; L<DH_generate_key(3)|DH_generate_key(3)> describes how
- to perform a key agreement.
- The B<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
- =head1 SEE ALSO
- L<dhparam(1)|dhparam(1)>, L<bn(3)|bn(3)>, L<dsa(3)|dsa(3)>, L<err(3)|err(3)>,
- L<rand(3)|rand(3)>, L<rsa(3)|rsa(3)>, L<DH_set_method(3)|DH_set_method(3)>,
- L<DH_new(3)|DH_new(3)>, L<DH_get_ex_new_index(3)|DH_get_ex_new_index(3)>,
- L<DH_generate_parameters(3)|DH_generate_parameters(3)>,
- L<DH_compute_key(3)|DH_compute_key(3)>, L<d2i_DHparams(3)|d2i_DHparams(3)>,
- L<RSA_print(3)|RSA_print(3)>
- =cut
|