/*- * Copyright (c) 2003, 2004, 2006 Lev Walkin . * All rights reserved. * Redistribution and modifications are permitted subject to BSD license. */ #include #include /* * UTF8String basic type description. */ static const ber_tlv_tag_t asn_DEF_UTF8String_tags[] = { (ASN_TAG_CLASS_UNIVERSAL | (12 << 2)), /* [UNIVERSAL 12] IMPLICIT ...*/ (ASN_TAG_CLASS_UNIVERSAL | (4 << 2)), /* ... OCTET STRING */ }; asn_TYPE_operation_t asn_OP_UTF8String = { OCTET_STRING_free, UTF8String_print, OCTET_STRING_compare, OCTET_STRING_decode_ber, /* Implemented in terms of OCTET STRING */ OCTET_STRING_encode_der, OCTET_STRING_decode_xer_utf8, OCTET_STRING_encode_xer_utf8, #ifdef ASN_DISABLE_OER_SUPPORT 0, 0, #else OCTET_STRING_decode_oer, OCTET_STRING_encode_oer, #endif /* ASN_DISABLE_OER_SUPPORT */ #ifdef ASN_DISABLE_PER_SUPPORT 0, 0, #else OCTET_STRING_decode_uper, OCTET_STRING_encode_uper, #endif /* ASN_DISABLE_PER_SUPPORT */ UTF8String_random_fill, 0 /* Use generic outmost tag fetcher */ }; asn_TYPE_descriptor_t asn_DEF_UTF8String = { "UTF8String", "UTF8String", &asn_OP_UTF8String, asn_DEF_UTF8String_tags, sizeof(asn_DEF_UTF8String_tags) / sizeof(asn_DEF_UTF8String_tags[0]) - 1, asn_DEF_UTF8String_tags, sizeof(asn_DEF_UTF8String_tags) / sizeof(asn_DEF_UTF8String_tags[0]), { 0, 0, UTF8String_constraint }, 0, 0, /* No members */ 0 /* No specifics */ }; /* * This is the table of length expectations. * The second half of this table is only applicable to the long sequences. */ static const int UTF8String_ht[2][16] = { { /* 0x0 ... 0x7 */ /* 0000..0111 */ 1, 1, 1, 1, 1, 1, 1, 1, /* 1000..1011(0), 1100..1101(2), 1110(3), 1111(-1) */ 0, 0, 0, 0, 2, 2, 3, -1 }, { /* 0xF0 .. 0xF7 */ /* 11110000..11110111 */ 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, -1, -1 } }; static const int32_t UTF8String_mv[7] = { 0, 0, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000 }; /* Internal aliases for return codes */ #define U8E_TRUNC -1 /* UTF-8 sequence truncated */ #define U8E_ILLSTART -2 /* Illegal UTF-8 sequence start */ #define U8E_NOTCONT -3 /* Continuation expectation failed */ #define U8E_NOTMIN -4 /* Not minimal length encoding */ #define U8E_EINVAL -5 /* Invalid arguments */ int UTF8String_constraint(const asn_TYPE_descriptor_t *td, const void *sptr, asn_app_constraint_failed_f *ctfailcb, void *app_key) { ssize_t len = UTF8String_length((const UTF8String_t *)sptr); switch(len) { case U8E_EINVAL: ASN__CTFAIL(app_key, td, sptr, "%s: value not given", td->name); break; case U8E_TRUNC: ASN__CTFAIL(app_key, td, sptr, "%s: truncated UTF-8 sequence (%s:%d)", td->name, __FILE__, __LINE__); break; case U8E_ILLSTART: ASN__CTFAIL(app_key, td, sptr, "%s: UTF-8 illegal start of encoding (%s:%d)", td->name, __FILE__, __LINE__); break; case U8E_NOTCONT: ASN__CTFAIL(app_key, td, sptr, "%s: UTF-8 not continuation (%s:%d)", td->name, __FILE__, __LINE__); break; case U8E_NOTMIN: ASN__CTFAIL(app_key, td, sptr, "%s: UTF-8 not minimal sequence (%s:%d)", td->name, __FILE__, __LINE__); break; } return (len < 0) ? -1 : 0; } static ssize_t UTF8String__process(const UTF8String_t *st, uint32_t *dst, size_t dstlen) { size_t length; uint8_t *buf = st->buf; uint8_t *end = buf + st->size; uint32_t *dstend = dst + dstlen; for(length = 0; buf < end; length++) { int ch = *buf; uint8_t *cend; int32_t value; int want; /* Compute the sequence length */ want = UTF8String_ht[0][ch >> 4]; switch(want) { case -1: /* Second half of the table, long sequence */ want = UTF8String_ht[1][ch & 0x0F]; if(want != -1) break; /* Fall through */ case 0: return U8E_ILLSTART; } /* assert(want >= 1 && want <= 6) */ /* Check character sequence length */ if(buf + want > end) return U8E_TRUNC; value = ch & (0xff >> want); cend = buf + want; for(buf++; buf < cend; buf++) { ch = *buf; if(ch < 0x80 || ch > 0xbf) return U8E_NOTCONT; value = (value << 6) | (ch & 0x3F); } if(value < UTF8String_mv[want]) return U8E_NOTMIN; if(dst < dstend) *dst++ = value; /* Record value */ } if(dst < dstend) *dst = 0; /* zero-terminate */ return length; } ssize_t UTF8String_length(const UTF8String_t *st) { if(st && st->buf) { return UTF8String__process(st, 0, 0); } else { return U8E_EINVAL; } } size_t UTF8String_to_wcs(const UTF8String_t *st, uint32_t *dst, size_t dstlen) { if(st && st->buf) { ssize_t ret = UTF8String__process(st, dst, dstlen); return (ret < 0) ? 0 : ret; } else { return 0; } } int UTF8String_print(const asn_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) < 0) ? -1 : 0; } else { return (cb("", 8, app_key) < 0) ? -1 : 0; } } /* * Biased function for randomizing UTF-8 sequences. */ static size_t UTF8String__random_char(uint8_t *b, size_t size) { static const struct rnd_value { const char *value; size_t size; } values[] = {{"\0", 1}, {"\x01", 1}, {"\x7f", 1}, {"\xc2\xa2", 2}, {"\xe2\x82\xac", 3}, {"\xf0\x90\x8d\x88", 4}, {"\xf4\x8f\xbf\xbf", 4}}; const struct rnd_value *v; size_t max_idx = 0; switch(size) { case 0: assert(size != 0); return 0; case 1: max_idx = 2; break; case 2: max_idx = 3; break; default: case 4: max_idx = sizeof(values) / sizeof(values[0]) - 1; break; } v = &values[asn_random_between(0, max_idx)]; memcpy(b, v->value, v->size); return v->size; } asn_random_fill_result_t UTF8String_random_fill(const asn_TYPE_descriptor_t *td, void **sptr, const asn_encoding_constraints_t *constraints, size_t max_length) { asn_random_fill_result_t result_ok = {ARFILL_OK, 1}; asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0}; asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0}; uint8_t *buf; uint8_t *bend; uint8_t *b; size_t rnd_len; size_t idx; UTF8String_t *st; if(max_length == 0 && !*sptr) return result_skipped; /* Figure out how far we should go */ rnd_len = OCTET_STRING_random_length_constrained(td, constraints, max_length / 4); buf = CALLOC(4, rnd_len + 1); if(!buf) return result_failed; bend = &buf[4 * rnd_len]; for(b = buf, idx = 0; idx < rnd_len; idx++) { b += UTF8String__random_char(b, (bend - b)); } *(uint8_t *)b = 0; if(*sptr) { st = *sptr; FREEMEM(st->buf); } else { st = (OCTET_STRING_t *)(*sptr = CALLOC(1, sizeof(UTF8String_t))); if(!st) { FREEMEM(buf); return result_failed; } } st->buf = buf; st->size = b - buf; assert(UTF8String_length(st) == (ssize_t)rnd_len); return result_ok; }