67 lines
2.0 KiB
Plaintext
67 lines
2.0 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
OpenSSL_add_all_algorithms, OpenSSL_add_all_ciphers, OpenSSL_add_all_digests -
|
|
add algorithms to internal table
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
void OpenSSL_add_all_algorithms(void);
|
|
void OpenSSL_add_all_ciphers(void);
|
|
void OpenSSL_add_all_digests(void);
|
|
|
|
void EVP_cleanup(void);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
OpenSSL keeps an internal table of digest algorithms and ciphers. It uses
|
|
this table to lookup ciphers via functions such as EVP_get_cipher_byname().
|
|
|
|
OpenSSL_add_all_digests() adds all digest algorithms to the table.
|
|
|
|
OpenSSL_add_all_algorithms() adds all algorithms to the table (digests and
|
|
ciphers).
|
|
|
|
OpenSSL_add_all_ciphers() adds all encryption algorithms to the table including
|
|
password based encryption algorithms.
|
|
|
|
EVP_cleanup() removes all ciphers and digests from the table.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
None of the functions return a value.
|
|
|
|
=head1 NOTES
|
|
|
|
A typical application will call OpenSSL_add_all_algorithms() initially and
|
|
EVP_cleanup() before exiting.
|
|
|
|
An application does not need to add algorithms to use them explicitly, for example
|
|
by EVP_sha1(). It just needs to add them if it (or any of the functions it calls)
|
|
needs to lookup algorithms.
|
|
|
|
The cipher and digest lookup functions are used in many parts of the library. If
|
|
the table is not initialized several functions will misbehave and complain they
|
|
cannot find algorithms. This includes the PEM, PKCS#12, SSL and S/MIME libraries.
|
|
This is a common query in the OpenSSL mailing lists.
|
|
|
|
Calling OpenSSL_add_all_algorithms() links in all algorithms: as a result a
|
|
statically linked executable can be quite large. If this is important it is possible
|
|
to just add the required ciphers and digests.
|
|
|
|
=head1 BUGS
|
|
|
|
Although the functions do not return error codes it is possible for them to fail.
|
|
This will only happen as a result of a memory allocation failure so this is not
|
|
too much of a problem in practice.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<evp(3)|evp(3)>, L<EVP_DigestInit(3)|EVP_DigestInit(3)>,
|
|
L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>
|
|
|
|
=cut
|