[461541a] | 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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[4721618] | 12 | #include "libabac_common.h" |
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[02036f4] | 13 | #include "abac_util.h" |
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[461541a] | 14 | |
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[ced246e] | 15 | void add_tail(abac_attribute_t *a, char *t) { |
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| 16 | char *roles[256]; /* The roles in t, separated by ' & ' */ |
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| 17 | int nroles = 256; /* Number of slots in roles and then number found by |
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| 18 | abac_split */ |
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| 19 | int i; /* Scratch */ |
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| 20 | |
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| 21 | abac_split(t, " & ", roles, &nroles); |
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| 22 | |
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| 23 | for ( i = 0; i < nroles; i++ ) { |
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| 24 | char *terms[3]; /* The terms in roles[i] */ |
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| 25 | int nterms = 3; /* Number of slots and then number used in terms */ |
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| 26 | |
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| 27 | abac_split(roles[i], ".", terms, &nterms); |
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| 28 | switch (nterms) { |
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| 29 | default: |
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| 30 | err(1, "Cannot parse term!!?"); |
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| 31 | break; |
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| 32 | case 1: |
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| 33 | abac_attribute_principal(a, terms[0]); |
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| 34 | break; |
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| 35 | case 2: |
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| 36 | abac_attribute_role(a, terms[0], terms[1]); |
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| 37 | break; |
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| 38 | case 3: |
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[23bc596] | 39 | abac_attribute_linking_role(a, terms[0], terms[1], terms[2]); |
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[ced246e] | 40 | break; |
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| 41 | } |
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| 42 | } |
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| 43 | } |
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| 44 | |
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| 45 | |
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| 46 | |
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[461541a] | 47 | void attribute_rule_main(options_t *opts) { |
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| 48 | int ret; |
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| 49 | |
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| 50 | if ( |
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| 51 | opts->issuer == NULL || |
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| 52 | opts->key == NULL || |
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| 53 | opts->attrrule == NULL || |
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| 54 | opts->out == NULL |
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| 55 | ) |
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| 56 | usage(opts); |
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| 57 | |
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| 58 | // issuer |
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| 59 | abac_id_t *issuer_id = abac_id_from_file(opts->issuer); |
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| 60 | if (issuer_id == NULL) |
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| 61 | errx(1, "Can't load cert from %s", opts->issuer); |
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| 62 | |
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| 63 | // private key |
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| 64 | ret = abac_id_privkey_from_file(issuer_id, opts->key); |
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| 65 | if (ret != ABAC_SUCCESS) |
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| 66 | errx(1, "Can't load private key from %s", opts->key); |
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| 67 | |
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| 68 | |
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| 69 | /* chop out the role, head_string, tail_string */ |
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| 70 | char *head_tail[2]; |
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| 71 | abac_split(opts->attrrule, "<-", head_tail, &ret); |
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| 72 | if (ret != 2) errx(1, "Invalid access rule"); |
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| 73 | |
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| 74 | char *head_role[2]; |
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| 75 | abac_split(head_tail[0], ".", head_role, &ret); |
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| 76 | if (ret != 2) errx(1, "Invalid access rule"); |
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| 77 | char *keyid=abac_xstrdup(head_role[0]); |
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| 78 | char *role =abac_xstrdup(head_role[1]); |
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| 79 | |
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| 80 | /* make sure keyid match up with issuer */ |
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| 81 | char *issuer=abac_id_keyid(issuer_id); |
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| 82 | if(strcmp(keyid,issuer)!=0) { |
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| 83 | errx(1, "Mismatched issuer with the access rule"); |
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| 84 | } |
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| 85 | |
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| 86 | abac_attribute_t *attr = NULL; |
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| 87 | ret = abac_attribute_create(&attr, issuer_id, role, opts->validity); |
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| 88 | if (ret == ABAC_ATTRIBUTE_ISSUER_NOKEY) |
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| 89 | abort(); // should never happen |
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| 90 | if (ret == ABAC_ATTRIBUTE_INVALID_ROLE) |
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| 91 | errx(1, "Invalid role name: %s", role); |
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| 92 | if (ret == ABAC_ATTRIBUTE_INVALID_VALIDITY) |
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| 93 | errx(1, "Invalid validity: must be >= 1 second"); |
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| 94 | |
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[ced246e] | 95 | add_tail(attr, head_tail[1]); |
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[461541a] | 96 | |
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| 97 | ret = abac_attribute_bake(attr); |
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| 98 | if (!ret) |
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| 99 | errx(1, "Couldn't bake attribute cert"); |
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| 100 | |
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| 101 | FILE *out = fopen(opts->out, "w"); |
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| 102 | if (out == NULL) |
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| 103 | err(1, "Couldn't open attr cert file %s for writing", opts->out); |
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| 104 | |
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| 105 | abac_attribute_write(attr, out); |
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| 106 | |
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| 107 | fclose(out); |
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| 108 | |
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| 109 | abac_attribute_free(attr); |
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| 110 | } |
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