| Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [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 <UTF8String.h> |
| 6 | |
| 7 | /* |
| 8 | * UTF8String basic type description. |
| 9 | */ |
| 10 | static ber_tlv_tag_t asn1_DEF_UTF8String_tags[] = { |
| 11 | (ASN_TAG_CLASS_UNIVERSAL | (12 << 2)) |
| 12 | }; |
| 13 | asn1_TYPE_descriptor_t asn1_DEF_UTF8String = { |
| 14 | "UTF8String", |
| 15 | UTF8String_constraint, /* Check for invalid codes, etc. */ |
| 16 | OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */ |
| 17 | OCTET_STRING_encode_der, /* Implemented in terms of OCTET STRING */ |
| 18 | UTF8String_print, |
| 19 | OCTET_STRING_free, |
| 20 | 0, /* Use generic outmost tag fetcher */ |
| 21 | asn1_DEF_UTF8String_tags, |
| 22 | sizeof(asn1_DEF_UTF8String_tags) |
| 23 | / sizeof(asn1_DEF_UTF8String_tags[0]), |
| 24 | 1, /* Single UNIVERSAL tag may be implicitly overriden */ |
| 25 | -1, /* Both ways are fine */ |
| 26 | }; |
| 27 | |
| 28 | static int _UTF8String_h1[16] = { |
| 29 | 1, 1, 1, 1, 1, 1, 1, 1, /* 0x0 ... 0x7 */ |
| 30 | 0, 0, 0, 0, 2, 2, 3, -1 |
| 31 | }; |
| 32 | static int _UTF8String_h2[16] = { |
| 33 | 4, 4, 4, 4, 4, 4, 4, 4, /* 0xF0 .. 0xF7 */ |
| 34 | 5, 5, 5, 5, 6, 6, -1, -1 |
| 35 | }; |
| 36 | |
| 37 | int |
| 38 | UTF8String_constraint(asn1_TYPE_descriptor_t *td, const void *sptr, |
| 39 | asn_app_consume_bytes_f *app_errlog, void *app_key) { |
| 40 | ssize_t len; |
| 41 | len = UTF8String_length(sptr, td->name, app_errlog, app_key); |
| 42 | if(len > 0) len = 0; |
| 43 | return len; |
| 44 | } |
| 45 | |
| 46 | ssize_t |
| 47 | UTF8String_length(const UTF8String_t *st, const char *opt_type_name, |
| 48 | asn_app_consume_bytes_f *app_errlog, void *app_key) { |
| 49 | |
| 50 | if(st && st->buf) { |
| 51 | size_t length = 0; |
| 52 | uint8_t *buf = st->buf; |
| 53 | uint8_t *end = buf + st->size; |
| 54 | int want; /* Number of bytes wanted */ |
| 55 | |
| 56 | for(want = 0; buf < end; buf++) { |
| 57 | uint8_t ch = *buf; |
| 58 | int w = _UTF8String_h1[ch >> 4]; |
| 59 | if(want) { /* Continuation expected */ |
| 60 | if(w) { |
| 61 | _ASN_ERRLOG("%s: UTF-8 expectation " |
| 62 | "failed at byte %d", |
| 63 | opt_type_name, |
| 64 | (buf - st->buf) + 1); |
| 65 | return -1; |
| 66 | } |
| 67 | want--; |
| 68 | } else { |
| 69 | switch(w) { |
| 70 | case -1: /* Long UTF-8 */ |
| 71 | w = _UTF8String_h2[ch & 0xF0]; |
| 72 | if(w != -1) |
| 73 | break; |
| 74 | /* Fall through */ |
| 75 | case 0: |
| 76 | _ASN_ERRLOG( |
| 77 | "%s: UTF-8 expectation" |
| 78 | "failed at byte %d", |
| 79 | opt_type_name, |
| 80 | (buf - st->buf) + 1); |
| 81 | return -1; |
| 82 | } |
| 83 | want = w - 1; /* Expect this much */ |
| 84 | } |
| 85 | if(!want) length++; |
| 86 | } |
| 87 | |
| 88 | /* If still want something, then something is wrong */ |
| 89 | if(want) { |
| 90 | _ASN_ERRLOG("%s: truncated UTF-8 sequence", |
| 91 | opt_type_name); |
| 92 | return -1; |
| 93 | } |
| 94 | |
| 95 | return length; |
| 96 | } else { |
| 97 | _ASN_ERRLOG("%s: value not given", opt_type_name); |
| 98 | return -1; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | int |
| 103 | UTF8String_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| 104 | asn_app_consume_bytes_f *cb, void *app_key) { |
| 105 | const UTF8String_t *st = sptr; |
| 106 | |
| 107 | if(st && st->buf) { |
| 108 | return cb(st->buf, st->size, app_key); |
| 109 | } else { |
| 110 | return cb("<absent>", 8, app_key); |
| 111 | } |
| 112 | } |