| /*- |
| * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| #include <UTF8String.h> |
| |
| /* |
| * UTF8String basic type description. |
| */ |
| static ber_tlv_tag_t asn1_DEF_UTF8String_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (12 << 2)) |
| }; |
| asn1_TYPE_descriptor_t asn1_DEF_UTF8String = { |
| "UTF8String", |
| UTF8String_constraint, /* Check for invalid codes, etc. */ |
| OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */ |
| OCTET_STRING_encode_der, /* Implemented in terms of OCTET STRING */ |
| UTF8String_print, |
| OCTET_STRING_free, |
| 0, /* Use generic outmost tag fetcher */ |
| asn1_DEF_UTF8String_tags, |
| sizeof(asn1_DEF_UTF8String_tags) |
| / sizeof(asn1_DEF_UTF8String_tags[0]), |
| 1, /* Single UNIVERSAL tag may be implicitly overriden */ |
| -1, /* Both ways are fine */ |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| static int _UTF8String_h1[16] = { |
| 1, 1, 1, 1, 1, 1, 1, 1, /* 0x0 ... 0x7 */ |
| 0, 0, 0, 0, 2, 2, 3, -1 |
| }; |
| static int _UTF8String_h2[16] = { |
| 4, 4, 4, 4, 4, 4, 4, 4, /* 0xF0 .. 0xF7 */ |
| 5, 5, 5, 5, 6, 6, -1, -1 |
| }; |
| |
| int |
| UTF8String_constraint(asn1_TYPE_descriptor_t *td, const void *sptr, |
| asn_app_consume_bytes_f *app_errlog, void *app_key) { |
| ssize_t len; |
| len = UTF8String_length((const UTF8String_t *)sptr, td->name, |
| app_errlog, app_key); |
| if(len > 0) len = 0; |
| return len; |
| } |
| |
| ssize_t |
| UTF8String_length(const UTF8String_t *st, const char *opt_type_name, |
| asn_app_consume_bytes_f *app_errlog, void *app_key) { |
| |
| if(st && st->buf) { |
| size_t length = 0; |
| uint8_t *buf = st->buf; |
| uint8_t *end = buf + st->size; |
| int want; /* Number of bytes wanted */ |
| |
| for(want = 0; buf < end; buf++) { |
| uint8_t ch = *buf; |
| int w = _UTF8String_h1[ch >> 4]; |
| if(want) { /* Continuation expected */ |
| if(w) { |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: UTF-8 expectation " |
| "failed at byte %d (%s:%d)", |
| opt_type_name, |
| (buf - st->buf) + 1, |
| __FILE__, __LINE__); |
| return -1; |
| } |
| want--; |
| } else { |
| switch(w) { |
| case -1: /* Long UTF-8 */ |
| w = _UTF8String_h2[ch & 0xF0]; |
| if(w != -1) |
| break; |
| /* Fall through */ |
| case 0: |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: UTF-8 expectation" |
| "failed at byte %d (%s:%d)", |
| opt_type_name, |
| (buf - st->buf) + 1, |
| __FILE__, __LINE__); |
| return -1; |
| } |
| want = w - 1; /* Expect this much */ |
| } |
| if(!want) length++; |
| } |
| |
| /* If still want something, then something is wrong */ |
| if(want) { |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: truncated UTF-8 sequence (%s:%d)", |
| opt_type_name, __FILE__, __LINE__); |
| return -1; |
| } |
| |
| return length; |
| } else { |
| _ASN_ERRLOG(app_errlog, app_key, |
| "%s: value not given", opt_type_name); |
| return -1; |
| } |
| } |
| |
| int |
| UTF8String_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| const UTF8String_t *st = (const UTF8String_t *)sptr; |
| |
| (void)td; /* Unused argument */ |
| (void)ilevel; /* Unused argument */ |
| |
| if(st && st->buf) { |
| return cb(st->buf, st->size, app_key); |
| } else { |
| return cb("<absent>", 8, app_key); |
| } |
| } |