1 | |
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2 | /* attribute_rule.c */ |
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3 | |
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4 | #define _GNU_SOURCE |
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5 | #include <stdio.h> |
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6 | #include <string.h> |
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7 | |
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8 | #include <err.h> |
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9 | #include <termios.h> |
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10 | |
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11 | #include "creddy_common.h" |
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12 | #include "libabac_common.h" |
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13 | #include "abac_util.h" |
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14 | |
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15 | void attribute_rule_main(options_t *opts) { |
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16 | int ret; |
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17 | |
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18 | if ( |
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19 | opts->issuer == NULL || |
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20 | opts->key == NULL || |
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21 | opts->attrrule == NULL || |
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22 | opts->out == NULL |
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23 | ) |
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24 | usage(opts); |
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25 | |
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26 | // issuer |
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27 | abac_id_t *issuer_id = abac_id_from_file(opts->issuer); |
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28 | if (issuer_id == NULL) |
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29 | errx(1, "Can't load cert from %s", opts->issuer); |
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30 | |
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31 | // private key |
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32 | ret = abac_id_privkey_from_file(issuer_id, opts->key); |
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33 | if (ret != ABAC_SUCCESS) |
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34 | errx(1, "Can't load private key from %s", opts->key); |
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35 | |
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36 | |
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37 | /* chop out the role, head_string, tail_string */ |
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38 | char *head_tail[2]; |
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39 | abac_split(opts->attrrule, "<-", head_tail, &ret); |
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40 | if (ret != 2) errx(1, "Invalid access rule"); |
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41 | char *head_string = abac_xstrdup(head_tail[0]); |
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42 | char *subject_string = abac_xstrdup(head_tail[1]); |
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43 | |
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44 | char *head_role[2]; |
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45 | abac_split(head_tail[0], ".", head_role, &ret); |
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46 | if (ret != 2) errx(1, "Invalid access rule"); |
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47 | char *keyid=abac_xstrdup(head_role[0]); |
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48 | char *role =abac_xstrdup(head_role[1]); |
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49 | |
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50 | /* make sure keyid match up with issuer */ |
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51 | char *issuer=abac_id_keyid(issuer_id); |
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52 | if(strcmp(keyid,issuer)!=0) { |
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53 | errx(1, "Mismatched issuer with the access rule"); |
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54 | } |
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55 | |
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56 | abac_attribute_t *attr = NULL; |
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57 | ret = abac_attribute_create(&attr, issuer_id, role, opts->validity); |
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58 | if (ret == ABAC_ATTRIBUTE_ISSUER_NOKEY) |
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59 | abort(); // should never happen |
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60 | if (ret == ABAC_ATTRIBUTE_INVALID_ROLE) |
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61 | errx(1, "Invalid role name: %s", role); |
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62 | if (ret == ABAC_ATTRIBUTE_INVALID_VALIDITY) |
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63 | errx(1, "Invalid validity: must be >= 1 second"); |
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64 | |
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65 | abac_attribute_set_head(attr,head_string); |
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66 | abac_attribute_set_tail(attr,subject_string); |
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67 | |
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68 | ret = abac_attribute_bake(attr); |
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69 | if (!ret) |
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70 | errx(1, "Couldn't bake attribute cert"); |
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71 | |
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72 | FILE *out = fopen(opts->out, "w"); |
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73 | if (out == NULL) |
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74 | err(1, "Couldn't open attr cert file %s for writing", opts->out); |
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75 | |
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76 | abac_attribute_write(attr, out); |
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77 | |
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78 | fclose(out); |
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79 | |
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80 | abac_attribute_free(attr); |
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81 | } |
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