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openssl/doc/crypto/DH_generate_parameters.pod

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Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=pod
=head1 NAME
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
DH_generate_parameters_ex, DH_generate_parameters,
DH_check - generate and check Diffie-Hellman parameters
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=head1 SYNOPSIS
#include <openssl/dh.h>
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
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int DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb);
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
int DH_check(DH *dh, int *codes);
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
Deprecated:
Backwards-compatibility subject to OPENSSL_API_COMPAT Provide backwards-compatiblity for functions, macros and include files if OPENSSL_API_COMPAT is either not defined or defined less than the version number of the release in which the feature was deprecated. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-01-05 12:00:33 +08:00
#if OPENSSL_API_COMPAT < 0x00908000L
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
DH *DH_generate_parameters(int prime_len, int generator,
void (*callback)(int, int, void *), void *cb_arg);
Backwards-compatibility subject to OPENSSL_API_COMPAT Provide backwards-compatiblity for functions, macros and include files if OPENSSL_API_COMPAT is either not defined or defined less than the version number of the release in which the feature was deprecated. Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-01-05 12:00:33 +08:00
#endif
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=head1 DESCRIPTION
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
DH_generate_parameters_ex() generates Diffie-Hellman parameters that can
be shared among a group of users, and stores them in the provided B<DH>
structure. The pseudo-random number generator must be
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
seeded prior to calling DH_generate_parameters().
B<prime_len> is the length in bits of the safe prime to be generated.
B<generator> is a small number E<gt> 1, typically 2 or 5.
A callback function may be used to provide feedback about the progress
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
of the key generation. If B<cb> is not B<NULL>, it will be
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-18 03:21:33 +08:00
called as described in L<BN_generate_prime(3)> while a random prime
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
number is generated, and when a prime has been found, B<BN_GENCB_call(cb, 3, 0)>
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-18 03:21:33 +08:00
is called. See L<BN_generate_prime(3)> for information on
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
the BN_GENCB_call() function.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
DH_check() validates Diffie-Hellman parameters. It checks that B<p> is
a safe prime, and that B<g> is a suitable generator. In the case of an
error, the bit flags DH_CHECK_P_NOT_SAFE_PRIME or
DH_NOT_SUITABLE_GENERATOR are set in B<*codes>.
DH_UNABLE_TO_CHECK_GENERATOR is set if the generator cannot be
checked, i.e. it does not equal 2 or 5.
=head1 RETURN VALUES
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
DH_generate_parameters_ex() and DH_check() return 1 if the check could be
performed, 0 otherwise.
DH_generate_parameters() (deprecated) returns a pointer to the DH structure, or
NULL if the parameter generation fails.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-18 03:21:33 +08:00
The error codes can be obtained by L<ERR_get_error(3)>.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=head1 NOTES
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
DH_generate_parameters_ex() and DH_generate_parameters() may run for several
hours before finding a suitable prime.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
Document updates from wiki. PR#3071 The primary changes made are: - Updates to the "NAME" section of many pages to correctly reflect the functions defined on those pages. This section is automatically parsed by the util/extract-names.pl script, so if it is not correct then running "man" will not correctly locate the right manual pages. - Updates to take account of where functions are now deprecated - Full documentation of the ec sub-library - A number of other typo corrections and other minor tweaks
2013-06-13 06:42:08 +08:00
The parameters generated by DH_generate_parameters_ex() and DH_generate_parameters()
are not to be used in signature schemes.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
Document DSA and SHA. New function BN_pseudo_rand(). Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when generating DSA primes (why not use BN_is_prime()?)
2000-01-28 03:31:26 +08:00
=head1 BUGS
If B<generator> is not 2 or 5, B<dh-E<gt>g>=B<generator> is not
a usable generator.
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=head1 SEE ALSO
Fix L<> content in manpages L<foo|foo> is sub-optimal If the xref is the same as the title, which is what we do, then you only need L<foo>. This fixes all 1457 occurrences in 349 files. Approximately. (And pod used to need both.) Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-18 03:21:33 +08:00
L<dh(3)>, L<ERR_get_error(3)>, L<rand(3)>,
L<DH_free(3)>
Document the DH library, and make some minor changes along the way.
2000-01-23 04:05:23 +08:00
=cut
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