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ykclient_server_response.h
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ykclient_server_response.h
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/* ykclient_server_response.c --- Server response parsing and validation.
*
* Written by Sebastien Martini <seb@dbzteam.org>.
* Copyright (c) 2011 Yubico AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef YKCLIENT_SERVER_RESPONSE_H
#define YKCLIENT_SERVER_RESPONSE_H
// Example:
// key: status
// value: OK
typedef struct ykclient_parameter_st {
char* key;
char* value;
} ykclient_parameter_t;
typedef struct ykclient_parameters_st {
ykclient_parameter_t* parameter;
struct ykclient_parameters_st* next;
} ykclient_parameters_t;
typedef struct ykclient_server_response_st {
ykclient_parameter_t* signature;
ykclient_parameters_t* parameters;
} ykclient_server_response_t;
// Returns NULL if it fails.
extern ykclient_server_response_t* ykclient_server_response_init();
// Frees allocated data structures.
extern void ykclient_server_response_free(ykclient_server_response_t* response);
// Parses server's response and builds a list of parameters and isolates
// the corresponding signature parameter. Returns 0 if it succeeds.
extern int ykclient_server_response_parse(
char* response,
ykclient_server_response_t* serv_response);
// Iterates the parameters buils a HMAC-SHA1 and checks it matches the
// signature returned by the server. This function returns 0 if the signature
// is valid, 1 otherwise.
extern int ykclient_server_response_verify_signature(
const ykclient_server_response_t* serv_response, const char* key,
int key_length);
// Returns value associated to key or NULL if unmatched. The caller doesn't
// take ownership of the returned value.
extern char* ykclient_server_response_get(
const ykclient_server_response_t* serv_response, const char* key);
#endif // YKCLIENT_SERVER_RESPONSE_H