Harald Welte | 43ab79f | 2018-10-03 23:34:21 +0200 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #include <asn_internal.h> |
| 6 | #include <BIT_STRING.h> |
| 7 | #include <asn_internal.h> |
| 8 | |
| 9 | /* |
| 10 | * BIT STRING basic type description. |
| 11 | */ |
| 12 | static const ber_tlv_tag_t asn_DEF_BIT_STRING_tags[] = { |
| 13 | (ASN_TAG_CLASS_UNIVERSAL | (3 << 2)) |
| 14 | }; |
| 15 | static asn_OCTET_STRING_specifics_t asn_DEF_BIT_STRING_specs = { |
| 16 | sizeof(BIT_STRING_t), |
| 17 | offsetof(BIT_STRING_t, _asn_ctx), |
| 18 | ASN_OSUBV_BIT |
| 19 | }; |
| 20 | asn_TYPE_descriptor_t asn_DEF_BIT_STRING = { |
| 21 | "BIT STRING", |
| 22 | "BIT_STRING", |
| 23 | OCTET_STRING_free, /* Implemented in terms of OCTET STRING */ |
| 24 | BIT_STRING_print, |
| 25 | BIT_STRING_constraint, |
| 26 | OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */ |
| 27 | OCTET_STRING_encode_der, /* Implemented in terms of OCTET STRING */ |
| 28 | OCTET_STRING_decode_xer_binary, |
| 29 | BIT_STRING_encode_xer, |
| 30 | OCTET_STRING_decode_uper, /* Unaligned PER decoder */ |
| 31 | OCTET_STRING_encode_uper, /* Unaligned PER encoder */ |
| 32 | OCTET_STRING_decode_aper, /* Aligned PER decoder */ |
| 33 | OCTET_STRING_encode_aper, /* Aligned PER encoder */ |
| 34 | 0, /* Use generic outmost tag fetcher */ |
| 35 | asn_DEF_BIT_STRING_tags, |
| 36 | sizeof(asn_DEF_BIT_STRING_tags) |
| 37 | / sizeof(asn_DEF_BIT_STRING_tags[0]), |
| 38 | asn_DEF_BIT_STRING_tags, /* Same as above */ |
| 39 | sizeof(asn_DEF_BIT_STRING_tags) |
| 40 | / sizeof(asn_DEF_BIT_STRING_tags[0]), |
| 41 | 0, /* No PER visible constraints */ |
| 42 | 0, 0, /* No members */ |
| 43 | &asn_DEF_BIT_STRING_specs |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * BIT STRING generic constraint. |
| 48 | */ |
| 49 | int |
| 50 | BIT_STRING_constraint(asn_TYPE_descriptor_t *td, const void *sptr, |
| 51 | asn_app_constraint_failed_f *ctfailcb, void *app_key) { |
| 52 | const BIT_STRING_t *st = (const BIT_STRING_t *)sptr; |
| 53 | |
| 54 | if(st && st->buf) { |
| 55 | if((st->size == 0 && st->bits_unused) |
| 56 | || st->bits_unused < 0 || st->bits_unused > 7) { |
| 57 | _ASN_CTFAIL(app_key, td, sptr, |
| 58 | "%s: invalid padding byte (%s:%d)", |
| 59 | td->name, __FILE__, __LINE__); |
| 60 | return -1; |
| 61 | } |
| 62 | } else { |
| 63 | _ASN_CTFAIL(app_key, td, sptr, |
| 64 | "%s: value not given (%s:%d)", |
| 65 | td->name, __FILE__, __LINE__); |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static char *_bit_pattern[16] = { |
| 73 | "0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111", |
| 74 | "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111" |
| 75 | }; |
| 76 | |
| 77 | asn_enc_rval_t |
| 78 | BIT_STRING_encode_xer(asn_TYPE_descriptor_t *td, void *sptr, |
| 79 | int ilevel, enum xer_encoder_flags_e flags, |
| 80 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 81 | asn_enc_rval_t er; |
| 82 | char scratch[128]; |
| 83 | char *p = scratch; |
| 84 | char *scend = scratch + (sizeof(scratch) - 10); |
| 85 | const BIT_STRING_t *st = (const BIT_STRING_t *)sptr; |
| 86 | int xcan = (flags & XER_F_CANONICAL); |
| 87 | uint8_t *buf; |
| 88 | uint8_t *end; |
| 89 | |
| 90 | if(!st || !st->buf) |
| 91 | _ASN_ENCODE_FAILED; |
| 92 | |
| 93 | er.encoded = 0; |
| 94 | |
| 95 | buf = st->buf; |
| 96 | end = buf + st->size - 1; /* Last byte is special */ |
| 97 | |
| 98 | /* |
| 99 | * Binary dump |
| 100 | */ |
| 101 | for(; buf < end; buf++) { |
| 102 | int v = *buf; |
| 103 | int nline = xcan?0:(((buf - st->buf) % 8) == 0); |
| 104 | if(p >= scend || nline) { |
| 105 | er.encoded += p - scratch; |
| 106 | _ASN_CALLBACK(scratch, p - scratch); |
| 107 | p = scratch; |
| 108 | if(nline) _i_ASN_TEXT_INDENT(1, ilevel); |
| 109 | } |
| 110 | memcpy(p + 0, _bit_pattern[v >> 4], 4); |
| 111 | memcpy(p + 4, _bit_pattern[v & 0x0f], 4); |
| 112 | p += 8; |
| 113 | } |
| 114 | |
| 115 | if(!xcan && ((buf - st->buf) % 8) == 0) |
| 116 | _i_ASN_TEXT_INDENT(1, ilevel); |
| 117 | er.encoded += p - scratch; |
| 118 | _ASN_CALLBACK(scratch, p - scratch); |
| 119 | p = scratch; |
| 120 | |
| 121 | if(buf == end) { |
| 122 | int v = *buf; |
| 123 | int ubits = st->bits_unused; |
| 124 | int i; |
| 125 | for(i = 7; i >= ubits; i--) |
| 126 | *p++ = (v & (1 << i)) ? 0x31 : 0x30; |
| 127 | er.encoded += p - scratch; |
| 128 | _ASN_CALLBACK(scratch, p - scratch); |
| 129 | } |
| 130 | |
| 131 | if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1); |
| 132 | |
| 133 | _ASN_ENCODED_OK(er); |
| 134 | cb_failed: |
| 135 | _ASN_ENCODE_FAILED; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | /* |
| 140 | * BIT STRING specific contents printer. |
| 141 | */ |
| 142 | int |
| 143 | BIT_STRING_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| 144 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 145 | const char * const h2c = "0123456789ABCDEF"; |
| 146 | char scratch[64]; |
| 147 | const BIT_STRING_t *st = (const BIT_STRING_t *)sptr; |
| 148 | uint8_t *buf; |
| 149 | uint8_t *end; |
| 150 | char *p = scratch; |
| 151 | |
| 152 | (void)td; /* Unused argument */ |
| 153 | |
| 154 | if(!st || !st->buf) |
| 155 | return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| 156 | |
| 157 | ilevel++; |
| 158 | buf = st->buf; |
| 159 | end = buf + st->size; |
| 160 | |
| 161 | /* |
| 162 | * Hexadecimal dump. |
| 163 | */ |
| 164 | for(; buf < end; buf++) { |
| 165 | if((buf - st->buf) % 16 == 0 && (st->size > 16) |
| 166 | && buf != st->buf) { |
| 167 | _i_INDENT(1); |
| 168 | /* Dump the string */ |
| 169 | if(cb(scratch, p - scratch, app_key) < 0) return -1; |
| 170 | p = scratch; |
| 171 | } |
| 172 | *p++ = h2c[*buf >> 4]; |
| 173 | *p++ = h2c[*buf & 0x0F]; |
| 174 | *p++ = 0x20; |
| 175 | } |
| 176 | |
| 177 | if(p > scratch) { |
| 178 | p--; /* Eat the tailing space */ |
| 179 | |
| 180 | if((st->size > 16)) { |
| 181 | _i_INDENT(1); |
| 182 | } |
| 183 | |
| 184 | /* Dump the incomplete 16-bytes row */ |
| 185 | if(cb(scratch, p - scratch, app_key) < 0) |
| 186 | return -1; |
| 187 | } |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |