mirror of https://github.com/openssl/openssl.git
109 lines
4.0 KiB
Plaintext
109 lines
4.0 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
SRP_VBASE_new,
|
|
SRP_VBASE_free,
|
|
SRP_VBASE_init,
|
|
SRP_VBASE_add0_user,
|
|
SRP_VBASE_get1_by_user,
|
|
SRP_VBASE_get_by_user
|
|
- Functions to create and manage a stack of SRP user verifier information
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/srp.h>
|
|
|
|
The following functions have been deprecated since OpenSSL 3.0, and can be
|
|
hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
|
|
see L<openssl_user_macros(7)>:
|
|
|
|
SRP_VBASE *SRP_VBASE_new(char *seed_key);
|
|
void SRP_VBASE_free(SRP_VBASE *vb);
|
|
|
|
int SRP_VBASE_init(SRP_VBASE *vb, char *verifier_file);
|
|
|
|
int SRP_VBASE_add0_user(SRP_VBASE *vb, SRP_user_pwd *user_pwd);
|
|
SRP_user_pwd *SRP_VBASE_get1_by_user(SRP_VBASE *vb, char *username);
|
|
SRP_user_pwd *SRP_VBASE_get_by_user(SRP_VBASE *vb, char *username);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
All of the functions described on this page are deprecated. There are no
|
|
available replacement functions at this time.
|
|
|
|
The SRP_VBASE_new() function allocates a structure to store server side SRP
|
|
verifier information.
|
|
If B<seed_key> is not NULL a copy is stored and used to generate dummy parameters
|
|
for users that are not found by SRP_VBASE_get1_by_user(). This allows the server
|
|
to hide the fact that it doesn't have a verifier for a particular username,
|
|
as described in section 2.5.1.3 'Unknown SRP' of RFC 5054.
|
|
The seed string should contain random NUL terminated binary data (therefore
|
|
the random data should not contain NUL bytes!).
|
|
|
|
The SRP_VBASE_free() function frees up the B<vb> structure.
|
|
If B<vb> is NULL, nothing is done.
|
|
|
|
The SRP_VBASE_init() function parses the information in a verifier file and
|
|
populates the B<vb> structure.
|
|
The verifier file is a text file containing multiple entries, whose format is:
|
|
flag base64(verifier) base64(salt) username gNid userinfo(optional)
|
|
where the flag can be 'V' (valid) or 'R' (revoked).
|
|
Note that the base64 encoding used here is non-standard so it is recommended
|
|
to use L<openssl-srp(1)> to generate this file.
|
|
|
|
The SRP_VBASE_add0_user() function adds the B<user_pwd> verifier information
|
|
to the B<vb> structure. See L<SRP_user_pwd_new(3)> to create and populate this
|
|
record.
|
|
The library takes ownership of B<user_pwd>, it should not be freed by the caller.
|
|
|
|
The SRP_VBASE_get1_by_user() function returns the password info for the user
|
|
whose username matches B<username>. It replaces the deprecated
|
|
SRP_VBASE_get_by_user().
|
|
If no matching user is found but a seed_key and default gN parameters have been
|
|
set, dummy authentication information is generated from the seed_key, allowing
|
|
the server to hide the fact that it doesn't have a verifier for a particular
|
|
username. When using SRP as a TLS authentication mechanism, this will cause
|
|
the handshake to proceed normally but the first client will be rejected with
|
|
a "bad_record_mac" alert, as if the password was incorrect.
|
|
If no matching user is found and the seed_key is not set, NULL is returned.
|
|
Ownership of the returned pointer is released to the caller, it must be freed
|
|
with SRP_user_pwd_free().
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
SRP_VBASE_init() returns B<SRP_NO_ERROR> (0) on success and a positive value
|
|
on failure.
|
|
The error codes are B<SRP_ERR_OPEN_FILE> if the file could not be opened,
|
|
B<SRP_ERR_VBASE_INCOMPLETE_FILE> if the file could not be parsed,
|
|
B<SRP_ERR_MEMORY> on memory allocation failure and B<SRP_ERR_VBASE_BN_LIB>
|
|
for invalid decoded parameter values.
|
|
|
|
SRP_VBASE_add0_user() returns 1 on success and 0 on failure.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<openssl-srp(1)>,
|
|
L<SRP_create_verifier(3)>,
|
|
L<SRP_user_pwd_new(3)>,
|
|
L<SSL_CTX_set_srp_password(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
The SRP_VBASE_add0_user() function was added in OpenSSL 3.0.
|
|
|
|
All other functions were added in OpenSSL 1.0.1.
|
|
|
|
All of these functions were deprecated in OpenSSL 3.0.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|