1 | /*- |
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2 | * Copyright (c) 2002 Networks Associates Technologies, Inc. |
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3 | * All rights reserved. |
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4 | * |
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5 | * This software was developed for the FreeBSD Project by ThinkSec AS and |
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6 | * NAI Labs, the Security Research Division of Network Associates, Inc. |
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7 | * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the |
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8 | * DARPA CHATS research program. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 3. The name of the author may not be used to endorse or promote |
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19 | * products derived from this software without specific prior written |
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20 | * permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 | * SUCH DAMAGE. |
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33 | * |
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34 | * $P4: //depot/projects/openpam/lib/openpam_dynamic.c#1 $ |
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35 | */ |
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36 | |
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37 | #include <dlfcn.h> |
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38 | #include <stdio.h> |
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39 | #include <stdlib.h> |
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40 | #include <string.h> |
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41 | |
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42 | #include <security/pam_appl.h> |
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43 | |
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44 | #include "openpam_impl.h" |
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45 | |
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46 | /* |
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47 | * OpenPAM internal |
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48 | * |
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49 | * Locate a dynamically linked module |
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50 | */ |
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51 | |
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52 | pam_module_t * |
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53 | openpam_dynamic(const char *path) |
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54 | { |
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55 | pam_module_t *module; |
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56 | char *vpath; |
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57 | void *dlh; |
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58 | int i; |
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59 | |
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60 | if ((module = calloc(1, sizeof *module)) == NULL) |
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61 | goto buf_err; |
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62 | |
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63 | /* try versioned module first, then unversioned module */ |
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64 | if (asprintf(&vpath, "%s.%d", path, LIB_MAJ) == -1) |
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65 | goto buf_err; |
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66 | if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) { |
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67 | openpam_log(PAM_LOG_ERROR, "dlopen(): %s", dlerror()); |
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68 | *strrchr(vpath, '.') = '\0'; |
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69 | if ((dlh = dlopen(vpath, RTLD_NOW)) == NULL) { |
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70 | openpam_log(PAM_LOG_ERROR, "dlopen(): %s", dlerror()); |
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71 | free(module); |
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72 | return (NULL); |
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73 | } |
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74 | } |
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75 | module->path = vpath; |
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76 | module->dlh = dlh; |
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77 | for (i = 0; i < PAM_NUM_PRIMITIVES; ++i) |
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78 | module->func[i] = dlsym(dlh, _pam_sm_func_name[i]); |
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79 | return (module); |
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80 | buf_err: |
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81 | openpam_log(PAM_LOG_ERROR, "%m"); |
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82 | dlclose(dlh); |
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83 | free(module); |
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84 | return (NULL); |
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85 | } |
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86 | |
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87 | /* |
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88 | * NOPARSE |
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89 | */ |
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