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81 lines
2.8 KiB
81 lines
2.8 KiB
=pod |
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=begin comment |
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Copyright 2005 Nokia. All rights reserved. |
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The portions of the attached software ("Contribution") is developed by |
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Nokia Corporation and is licensed pursuant to the OpenSSL open source |
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license. |
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The Contribution, originally written by Mika Kousa and Pasi Eronen of |
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Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites |
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support (see RFC 4279) to OpenSSL. |
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No patent licenses or other rights except those expressly stated in |
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the OpenSSL open source license shall be deemed granted or received |
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expressly, by implication, estoppel, or otherwise. |
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No assurances are provided by Nokia that the Contribution does not |
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infringe the patent or other intellectual property rights of any third |
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party or that the license provides you with all the necessary rights |
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to make use of the Contribution. |
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THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN |
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ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA |
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SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY |
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OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR |
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OTHERWISE. |
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=end comment |
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=head1 NAME |
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SSL_CTX_set_psk_client_callback, SSL_set_psk_client_callback - set PSK client callback |
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=head1 SYNOPSIS |
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#include <openssl/ssl.h> |
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void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, |
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unsigned int (*callback)(SSL *ssl, const char *hint, |
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char *identity, unsigned int max_identity_len, |
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unsigned char *psk, unsigned int max_psk_len)); |
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void SSL_set_psk_client_callback(SSL *ssl, |
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unsigned int (*callback)(SSL *ssl, const char *hint, |
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char *identity, unsigned int max_identity_len, |
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unsigned char *psk, unsigned int max_psk_len)); |
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=head1 DESCRIPTION |
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A client application must provide a callback function which is called |
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when the client is sending the ClientKeyExchange message to the server. |
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The purpose of the callback function is to select the PSK identity and |
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the pre-shared key to use during the connection setup phase. |
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The callback is set using functions SSL_CTX_set_psk_client_callback() |
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or SSL_set_psk_client_callback(). The callback function is given the |
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connection in parameter B<ssl>, a B<NULL>-terminated PSK identity hint |
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sent by the server in parameter B<hint>, a buffer B<identity> of |
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length B<max_identity_len> bytes where the the resulting |
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B<NULL>-terminated identity is to be stored, and a buffer B<psk> of |
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length B<max_psk_len> bytes where the resulting pre-shared key is to |
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be stored. |
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=head1 NOTES |
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Note that parameter B<hint> given to the callback may be B<NULL>. |
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=head1 RETURN VALUES |
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Return values from the client callback are interpreted as follows: |
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On success (callback found a PSK identity and a pre-shared key to use) |
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the length (> 0) of B<psk> in bytes is returned. |
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Otherwise or on errors callback should return 0. In this case |
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the connection setup fails. |
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=cut
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