vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2003 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #include <BOOLEAN.h> |
| 6 | |
| 7 | /* |
| 8 | * BOOLEAN basic type description. |
| 9 | */ |
| 10 | static ber_tlv_tag_t asn1_DEF_BOOLEAN_tags[] = { |
| 11 | (ASN_TAG_CLASS_UNIVERSAL | (1 << 2)) |
| 12 | }; |
| 13 | asn1_TYPE_descriptor_t asn1_DEF_BOOLEAN = { |
| 14 | "BOOLEAN", |
| 15 | asn_generic_no_constraint, |
| 16 | BOOLEAN_decode_ber, |
| 17 | BOOLEAN_encode_der, |
| 18 | BOOLEAN_print, |
| 19 | BOOLEAN_free, |
| 20 | 0, /* Use generic outmost tag fetcher */ |
| 21 | asn1_DEF_BOOLEAN_tags, |
| 22 | sizeof(asn1_DEF_BOOLEAN_tags)/sizeof(asn1_DEF_BOOLEAN_tags[0]), |
| 23 | 1, /* Single UNIVERSAL tag may be implicitly overriden */ |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 24 | 0, /* Always in primitive form */ |
vlm | e413c12 | 2004-08-20 13:23:42 +0000 | [diff] [blame] | 25 | 0, 0, /* No members */ |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 26 | 0 /* No specifics */ |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 27 | }; |
| 28 | |
| 29 | /* |
| 30 | * Decode BOOLEAN type. |
| 31 | */ |
| 32 | ber_dec_rval_t |
| 33 | BOOLEAN_decode_ber(asn1_TYPE_descriptor_t *td, |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 34 | void **bool_value, void *buf_ptr, size_t size, |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 35 | int tag_mode) { |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 36 | BOOLEAN_t *st = (BOOLEAN_t *)*bool_value; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 37 | ber_dec_rval_t rval; |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 38 | ber_dec_ctx_t ctx = { 0, 0, 0, 0 }; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 39 | ber_tlv_len_t length; |
| 40 | ber_tlv_len_t lidx; |
| 41 | |
| 42 | if(st == NULL) { |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 43 | (void *)st = *bool_value = CALLOC(1, sizeof(*st)); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 44 | if(st == NULL) { |
| 45 | rval.code = RC_FAIL; |
| 46 | rval.consumed = 0; |
| 47 | return rval; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | ASN_DEBUG("Decoding %s as BOOLEAN (tm=%d)", |
| 52 | td->name, tag_mode); |
| 53 | |
| 54 | /* |
| 55 | * Check tags. |
| 56 | */ |
| 57 | rval = ber_check_tags(td, &ctx, |
| 58 | buf_ptr, size, tag_mode, &length, 0); |
| 59 | if(rval.code != RC_OK) |
| 60 | return rval; |
| 61 | |
| 62 | ASN_DEBUG("Boolean length is %d bytes", (int)length); |
| 63 | |
vlm | d86c925 | 2004-08-25 01:34:11 +0000 | [diff] [blame] | 64 | buf_ptr = ((char *)buf_ptr) + rval.consumed; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 65 | size -= rval.consumed; |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 66 | if(length > (ber_tlv_len_t)size) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 67 | rval.code = RC_WMORE; |
| 68 | rval.consumed = 0; |
| 69 | return rval; |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * Compute boolean value. |
| 74 | */ |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 75 | for(*st = 0, lidx = 0; |
| 76 | (lidx < length) && *st == 0; lidx++) { |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 77 | /* |
| 78 | * Very simple approach: read bytes until the end or |
| 79 | * value is already TRUE. |
| 80 | * BOOLEAN is not supposed to contain meaningful data anyway. |
| 81 | */ |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 82 | *st |= ((uint8_t *)buf_ptr)[lidx]; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | rval.code = RC_OK; |
| 86 | rval.consumed += length; |
| 87 | |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 88 | ASN_DEBUG("Took %ld/%ld bytes to encode %s, value=%d", |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 89 | (long)rval.consumed, (long)length, |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 90 | td->name, *st); |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 91 | |
| 92 | return rval; |
| 93 | } |
| 94 | |
| 95 | der_enc_rval_t |
| 96 | BOOLEAN_encode_der(asn1_TYPE_descriptor_t *td, void *sptr, |
| 97 | int tag_mode, ber_tlv_tag_t tag, |
| 98 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 99 | der_enc_rval_t erval; |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 100 | BOOLEAN_t *st = (BOOLEAN_t *)sptr; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 101 | |
| 102 | erval.encoded = der_write_tags(td, 1, tag_mode, tag, cb, app_key); |
| 103 | if(erval.encoded == -1) { |
| 104 | erval.failed_type = td; |
| 105 | erval.structure_ptr = sptr; |
| 106 | return erval; |
| 107 | } |
| 108 | |
| 109 | if(cb) { |
| 110 | uint8_t bool_value; |
| 111 | ssize_t ret; |
| 112 | |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 113 | bool_value = *st?0xff:0; /* 0xff mandated by DER */ |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 114 | ret = cb(&bool_value, 1, app_key); |
| 115 | if(ret == -1) { |
| 116 | erval.encoded = -1; |
| 117 | erval.failed_type = td; |
| 118 | erval.structure_ptr = sptr; |
| 119 | return erval; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | erval.encoded += 1; |
| 124 | |
| 125 | return erval; |
| 126 | } |
| 127 | |
| 128 | int |
| 129 | BOOLEAN_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| 130 | asn_app_consume_bytes_f *cb, void *app_key) { |
vlm | da67468 | 2004-08-11 09:07:36 +0000 | [diff] [blame] | 131 | const BOOLEAN_t *st = (const BOOLEAN_t *)sptr; |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 132 | |
vlm | b42843a | 2004-06-05 08:17:50 +0000 | [diff] [blame] | 133 | (void)td; /* Unused argument */ |
| 134 | (void)ilevel; /* Unused argument */ |
| 135 | |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 136 | if(st) { |
vlm | af9cf13 | 2004-08-19 13:26:36 +0000 | [diff] [blame] | 137 | if(*st) |
vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 138 | return cb("TRUE", 4, app_key); |
| 139 | else |
| 140 | return cb("FALSE", 5, app_key); |
| 141 | } else { |
| 142 | return cb("<absent>", 8, app_key); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | void |
| 147 | BOOLEAN_free(asn1_TYPE_descriptor_t *td, void *ptr, int contents_only) { |
| 148 | if(td && ptr && !contents_only) { |
| 149 | FREEMEM(ptr); |
| 150 | } |
| 151 | } |
| 152 | |