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https://github.com/Yubico/yubico-pam.git
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104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/*
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* Copyright (c) 2011-2013 Yubico AB
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* Copyright (c) 2011 Tollef Fog Heen <tfheen@err.no>
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* All rights reserved.
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*
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* Author : Fredrik Thulin <fredrik@yubico.com>
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* Author : Tollef Fog Heen <tfheen@err.no>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PAM_YUBICO_UTIL_H_INCLUDED__
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#define __PAM_YUBICO_UTIL_H_INCLUDED__
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#include <stdio.h>
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#include <ykclient.h>
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#if defined(DEBUG_PAM)
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# if defined(HAVE_SECURITY__PAM_MACROS_H)
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# define DEBUG
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# include <security/_pam_macros.h>
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# else
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# define D(x) do { \
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printf ("debug: %s:%d (%s): ", __FILE__, __LINE__, __FUNCTION__); \
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printf x; \
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printf ("\n"); \
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} while (0)
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# endif /* HAVE_SECURITY__PAM_MACROS_H */
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#else
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# define D(x)
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#endif /* DEBUG_PAM */
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int get_user_cfgfile_path(const char *common_path, const char *filename, const char *username, char **fn);
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#if HAVE_CR
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#include <ykcore.h>
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#include <ykstatus.h>
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#include <ykdef.h>
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/* Challenges can be 0..63 or 64 bytes long, depending on YubiKey configuration.
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* We settle for 63 bytes to have something that works with all configurations.
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*/
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#define CR_CHALLENGE_SIZE 63
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#define CR_RESPONSE_SIZE 20
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#define CR_SALT_SIZE 32
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#define CR_DEFAULT_ITERATIONS 10000
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struct chalresp_state {
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char challenge[CR_CHALLENGE_SIZE];
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uint8_t challenge_len;
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char response[CR_RESPONSE_SIZE];
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uint8_t response_len;
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char salt[CR_SALT_SIZE];
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uint8_t salt_len;
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uint8_t slot;
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uint32_t iterations;
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};
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typedef struct chalresp_state CR_STATE;
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int generate_random(void *buf, int len);
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int get_user_challenge_file(YK_KEY *yk, const char *chalresp_path, const char *username, char **fn);
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int load_chalresp_state(FILE *f, CR_STATE *state, bool verbose);
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int write_chalresp_state(FILE *f, CR_STATE *state);
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int init_yubikey(YK_KEY **yk);
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int check_firmware_version(YK_KEY *yk, bool verbose, bool quiet);
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int challenge_response(YK_KEY *yk, int slot,
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char *challenge, unsigned int len,
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bool hmac, bool may_block, bool verbose,
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char *response, unsigned int res_size, unsigned int *res_len);
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#endif /* HAVE_CR */
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#endif /* __PAM_YUBICO_UTIL_H_INCLUDED__ */
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