533 lines
14 KiB
C
533 lines
14 KiB
C
/*-
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* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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*/
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#include <asn_internal.h>
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#include <INTEGER.h>
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#include <OBJECT_IDENTIFIER.h>
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#include <asn_codecs_prim.h>
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#include <limits.h> /* for CHAR_BIT */
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#include <errno.h>
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#include <inttypes.h>
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/*
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* OBJECT IDENTIFIER basic type description.
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*/
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static const ber_tlv_tag_t asn_DEF_OBJECT_IDENTIFIER_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (6 << 2))
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};
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asn_TYPE_operation_t asn_OP_OBJECT_IDENTIFIER = {
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ASN__PRIMITIVE_TYPE_free,
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#if !defined(ASN_DISABLE_PRINT_SUPPORT)
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OBJECT_IDENTIFIER_print,
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#else
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0,
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#endif /* !defined(ASN_DISABLE_PRINT_SUPPORT) */
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OCTET_STRING_compare, /* Implemented in terms of a string comparison */
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#if !defined(ASN_DISABLE_BER_SUPPORT)
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ber_decode_primitive,
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der_encode_primitive,
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#else
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0,
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0,
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#endif /* !defined(ASN_DISABLE_BER_SUPPORT) */
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#if !defined(ASN_DISABLE_XER_SUPPORT)
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OBJECT_IDENTIFIER_decode_xer,
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OBJECT_IDENTIFIER_encode_xer,
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#else
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0,
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0,
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#endif /* !defined(ASN_DISABLE_XER_SUPPORT) */
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#if !defined(ASN_DISABLE_JER_SUPPORT)
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OBJECT_IDENTIFIER_encode_jer,
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#else
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0,
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#endif /* !defined(ASN_DISABLE_JER_SUPPORT) */
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#if !defined(ASN_DISABLE_OER_SUPPORT)
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OBJECT_IDENTIFIER_decode_oer,
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OBJECT_IDENTIFIER_encode_oer,
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#else
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0,
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0,
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#endif /* !defined(ASN_DISABLE_OER_SUPPORT) */
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#if !defined(ASN_DISABLE_UPER_SUPPORT)
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OCTET_STRING_decode_uper,
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OCTET_STRING_encode_uper,
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#else
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0,
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0,
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#endif /* !defined(ASN_DISABLE_UPER_SUPPORT) */
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#if !defined(ASN_DISABLE_APER_SUPPORT)
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OCTET_STRING_decode_aper,
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OCTET_STRING_encode_aper,
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#else
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0,
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0,
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#endif /* !defined(ASN_DISABLE_APER_SUPPORT) */
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#if !defined(ASN_DISABLE_RFILL_SUPPORT)
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OBJECT_IDENTIFIER_random_fill,
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#else
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0,
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#endif /* !defined(ASN_DISABLE_RFILL_SUPPORT) */
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0 /* Use generic outmost tag fetcher */
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};
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asn_TYPE_descriptor_t asn_DEF_OBJECT_IDENTIFIER = {
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"OBJECT IDENTIFIER",
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"OBJECT_IDENTIFIER",
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&asn_OP_OBJECT_IDENTIFIER,
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asn_DEF_OBJECT_IDENTIFIER_tags,
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sizeof(asn_DEF_OBJECT_IDENTIFIER_tags)
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/ sizeof(asn_DEF_OBJECT_IDENTIFIER_tags[0]),
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asn_DEF_OBJECT_IDENTIFIER_tags, /* Same as above */
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sizeof(asn_DEF_OBJECT_IDENTIFIER_tags)
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/ sizeof(asn_DEF_OBJECT_IDENTIFIER_tags[0]),
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{
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#if !defined(ASN_DISABLE_OER_SUPPORT)
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0,
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#endif /* !defined(ASN_DISABLE_OER_SUPPORT) */
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#if !defined(ASN_DISABLE_UPER_SUPPORT) || !defined(ASN_DISABLE_APER_SUPPORT)
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0,
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#endif /* !defined(ASN_DISABLE_UPER_SUPPORT) || !defined(ASN_DISABLE_APER_SUPPORT) */
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OBJECT_IDENTIFIER_constraint
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},
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0, 0, /* No members */
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0 /* No specifics */
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};
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int
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OBJECT_IDENTIFIER_constraint(const asn_TYPE_descriptor_t *td, const void *sptr,
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asn_app_constraint_failed_f *ctfailcb,
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void *app_key) {
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const OBJECT_IDENTIFIER_t *st = (const OBJECT_IDENTIFIER_t *)sptr;
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if(st && st->buf) {
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if(st->size < 1) {
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ASN__CTFAIL(app_key, td, sptr,
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"%s: at least one numerical value "
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"expected (%s:%d)",
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td->name, __FILE__, __LINE__);
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return -1;
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}
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} else {
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ASN__CTFAIL(app_key, td, sptr,
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"%s: value not given (%s:%d)",
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td->name, __FILE__, __LINE__);
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return -1;
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}
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return 0;
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}
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static ssize_t
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OBJECT_IDENTIFIER_get_first_arcs(const uint8_t *arcbuf, size_t arcbuf_len,
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asn_oid_arc_t *arc0, asn_oid_arc_t *arc1) {
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asn_oid_arc_t value;
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ssize_t rd = OBJECT_IDENTIFIER_get_single_arc(arcbuf, arcbuf_len, &value);
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if(rd <= 0) return rd;
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if(value >= 80) {
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*arc0 = 2;
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*arc1 = value - 80;
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} else if(value >= 40) {
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*arc0 = 1;
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*arc1 = value - 40;
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} else {
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*arc0 = 0;
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*arc1 = value;
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}
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return rd;
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}
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ssize_t
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OBJECT_IDENTIFIER_get_single_arc(const uint8_t *arcbuf, size_t arcbuf_len,
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asn_oid_arc_t *ret_value) {
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const uint8_t *b = arcbuf;
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const uint8_t *arcend = arcbuf + arcbuf_len; /* End of arc */
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if(arcbuf == arcend) {
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return 0;
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} else {
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asn_oid_arc_t accum;
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asn_oid_arc_t upper_limit = (ASN_OID_ARC_MAX >> 7);
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/* When the value reaches "upper_limit", it can take */
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/* at most one more digit. If it exceeds "upper_limit" */
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/* but there are more digits - it's an Overflow condition */
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/* Gather all bits into the accumulator */
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for(accum = 0; b < arcend; b++) {
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accum = (accum << 7) | (*b & ~0x80);
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if((*b & 0x80) == 0) { // no more digits
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if(accum <= ASN_OID_ARC_MAX) {
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*ret_value = accum;
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return 1 + (b - arcbuf);
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} else {
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errno = ERANGE; /* Overflow */
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return -1;
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}
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} else { // to make sure we aren't wrapping around
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if(accum > upper_limit) {
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errno = ERANGE; /* Overflow */
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return -1;
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}
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}
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}
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errno = EINVAL;
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return -1;
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}
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}
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ssize_t
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OBJECT_IDENTIFIER__dump_body(const OBJECT_IDENTIFIER_t *st,
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asn_app_consume_bytes_f *cb, void *app_key) {
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char scratch[32];
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asn_oid_arc_t arc0 = 0;
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asn_oid_arc_t arc1 = 0;
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size_t produced = 0;
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size_t off = 0;
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ssize_t rd;
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int ret;
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rd = OBJECT_IDENTIFIER_get_first_arcs(st->buf, st->size, &arc0, &arc1);
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if(rd <= 0) {
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return -1;
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}
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ret = snprintf(scratch, sizeof(scratch), "%"PRIu32".%"PRIu32, arc0, arc1);
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if(ret >= (ssize_t)sizeof(scratch)) {
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return -1;
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}
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produced += ret;
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if(cb(scratch, ret, app_key) < 0)
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return -1;
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for(off = rd; ; ) {
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asn_oid_arc_t arc;
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rd = OBJECT_IDENTIFIER_get_single_arc(st->buf + off, st->size - off,
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&arc);
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if(rd < 0) {
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return -1;
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} else if(rd == 0) {
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/* No more arcs. */
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break;
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} else {
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off += rd;
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assert(off <= st->size);
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ret = snprintf(scratch, sizeof(scratch), ".%" PRIu32, arc);
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if(ret >= (ssize_t)sizeof(scratch)) {
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return -1;
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}
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produced += ret;
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if(cb(scratch, ret, app_key) < 0) return -1;
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}
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}
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if(off != st->size) {
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ASN_DEBUG("Could not scan to the end of Object Identifier");
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return -1;
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}
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return produced;
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}
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ssize_t
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OBJECT_IDENTIFIER_get_arcs(const OBJECT_IDENTIFIER_t *st, asn_oid_arc_t *arcs,
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size_t arc_slots) {
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asn_oid_arc_t arc0 = 0;
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asn_oid_arc_t arc1 = 0;
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size_t num_arcs = 0;
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size_t off;
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ssize_t rd;
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if(!st || !st->buf) {
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errno = EINVAL;
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return -1;
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}
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rd = OBJECT_IDENTIFIER_get_first_arcs(st->buf, st->size, &arc0, &arc1);
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if(rd <= 0) {
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return -1;
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}
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num_arcs = 2;
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switch(arc_slots) {
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default:
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case 2:
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arcs[1] = arc1;
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/* Fall through */
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case 1:
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arcs[0] = arc0;
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/* Fall through */
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case 0:
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break;
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}
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for(off = rd; ; ) {
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asn_oid_arc_t arc;
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rd = OBJECT_IDENTIFIER_get_single_arc(st->buf + off, st->size - off,
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&arc);
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if(rd < 0) {
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return -1;
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} else if(rd == 0) {
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/* No more arcs. */
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break;
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} else {
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off += rd;
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if(num_arcs < arc_slots) {
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arcs[num_arcs] = arc;
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}
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num_arcs++;
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}
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}
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if(off != st->size) {
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return -1;
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}
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return num_arcs;
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}
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/*
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* Save the single value as an object identifier arc.
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*/
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ssize_t
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OBJECT_IDENTIFIER_set_single_arc(uint8_t *arcbuf, size_t arcbuf_len,
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asn_oid_arc_t value) {
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/*
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* The following conditions must hold:
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* assert(arcbuf);
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*/
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uint8_t scratch[((sizeof(value) * CHAR_BIT + 6) / 7)];
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uint8_t *scratch_end = &scratch[sizeof(scratch)-1];
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uint8_t *b;
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size_t result_len;
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uint8_t mask;
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for(b = scratch_end, mask = 0; ; mask = 0x80, b--) {
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*b = mask | (value & 0x7f);
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value >>= 7;
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if(!value) {
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break;
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}
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}
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result_len = (scratch_end - b) + 1;
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if(result_len > arcbuf_len) {
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return -1;
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}
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memcpy(arcbuf, b, result_len);
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return result_len;
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}
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int
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OBJECT_IDENTIFIER_set_arcs(OBJECT_IDENTIFIER_t *st, const asn_oid_arc_t *arcs,
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size_t arc_slots) {
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uint8_t *buf;
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uint8_t *bp;
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ssize_t wrote;
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asn_oid_arc_t arc0;
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asn_oid_arc_t arc1;
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size_t size;
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size_t i;
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if(!st || !arcs || arc_slots < 2) {
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errno = EINVAL;
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return -1;
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}
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arc0 = arcs[0];
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arc1 = arcs[1];
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if(arc0 <= 1) {
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if(arc1 >= 40) {
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/* 8.19.4: At most 39 subsequent values (including 0) */
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errno = ERANGE;
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return -1;
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}
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} else if(arc0 == 2) {
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if(arc1 > ASN_OID_ARC_MAX - 80) {
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errno = ERANGE;
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return -1;
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}
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} else if(arc0 > 2) {
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/* 8.19.4: Only three values are allocated from the root node */
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errno = ERANGE;
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return -1;
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}
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/*
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* After above tests it is known that the value of arc0 is completely
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* trustworthy (0..2). However, the arc1's value is still meaningless.
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*/
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/*
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* Roughly estimate the maximum size necessary to encode these arcs.
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* This estimation implicitly takes in account the following facts,
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* that cancel each other:
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* * the first two arcs are encoded in a single value.
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* * the first value may require more space (+1 byte)
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* * the value of the first arc which is in range (0..2)
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*/
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size = ((sizeof(asn_oid_arc_t) * CHAR_BIT + 6) / 7) * arc_slots;
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bp = buf = (uint8_t *)MALLOC(size + 1);
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if(!buf) {
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/* ENOMEM */
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return -1;
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}
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wrote = OBJECT_IDENTIFIER_set_single_arc(bp, size, arc0 * 40 + arc1);
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if(wrote <= 0) {
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FREEMEM(buf);
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return -1;
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}
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assert((size_t)wrote <= size);
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bp += wrote;
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size -= wrote;
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for(i = 2; i < arc_slots; i++) {
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wrote = OBJECT_IDENTIFIER_set_single_arc(bp, size, arcs[i]);
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if(wrote <= 0) {
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FREEMEM(buf);
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return -1;
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}
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assert((size_t)wrote <= size);
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bp += wrote;
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size -= wrote;
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}
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/*
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* Replace buffer.
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*/
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st->size = bp - buf;
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bp = st->buf;
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st->buf = buf;
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st->buf[st->size] = '\0';
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if(bp) FREEMEM(bp);
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return 0;
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}
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ssize_t
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OBJECT_IDENTIFIER_parse_arcs(const char *oid_text, ssize_t oid_txt_length,
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asn_oid_arc_t *arcs, size_t arcs_count,
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const char **opt_oid_text_end) {
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size_t num_arcs = 0;
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const char *oid_end;
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enum {
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ST_LEADSPACE,
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ST_TAILSPACE,
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ST_AFTERVALUE, /* Next character ought to be '.' or a space */
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ST_WAITDIGITS /* Next character is expected to be a digit */
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} state = ST_LEADSPACE;
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if(!oid_text || oid_txt_length < -1 || (arcs_count && !arcs)) {
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if(opt_oid_text_end) *opt_oid_text_end = oid_text;
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errno = EINVAL;
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return -1;
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}
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if(oid_txt_length == -1)
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oid_txt_length = strlen(oid_text);
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#define _OID_CAPTURE_ARC(oid_text, oid_end) \
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do { \
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const char *endp = oid_end; \
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unsigned long value; \
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switch(asn_strtoul_lim(oid_text, &endp, &value)) { \
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case ASN_STRTOX_EXTRA_DATA: \
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case ASN_STRTOX_OK: \
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if(value <= ASN_OID_ARC_MAX) { \
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if(num_arcs < arcs_count) arcs[num_arcs] = value; \
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num_arcs++; \
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oid_text = endp - 1; \
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break; \
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} \
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/* Fall through */ \
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case ASN_STRTOX_ERROR_RANGE: \
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if(opt_oid_text_end) *opt_oid_text_end = oid_text; \
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errno = ERANGE; \
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return -1; \
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case ASN_STRTOX_ERROR_INVAL: \
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case ASN_STRTOX_EXPECT_MORE: \
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if(opt_oid_text_end) *opt_oid_text_end = oid_text; \
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errno = EINVAL; \
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return -1; \
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} \
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} while(0)
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for(oid_end = oid_text + oid_txt_length; oid_text<oid_end; oid_text++) {
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switch(*oid_text) {
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case 0x09: case 0x0a: case 0x0d: case 0x20: /* whitespace */
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switch(state) {
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case ST_LEADSPACE:
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case ST_TAILSPACE:
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continue;
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case ST_AFTERVALUE:
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state = ST_TAILSPACE;
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continue;
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case ST_WAITDIGITS:
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break; /* Digits expected after ".", got whitespace */
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}
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break;
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case 0x2e: /* '.' */
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switch(state) {
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case ST_LEADSPACE:
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case ST_TAILSPACE:
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case ST_WAITDIGITS:
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if(opt_oid_text_end)
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*opt_oid_text_end = oid_text;
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errno = EINVAL; /* Broken OID */
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return -1;
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break;
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case ST_AFTERVALUE:
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state = ST_WAITDIGITS;
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continue;
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}
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break;
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case 0x30: case 0x31: case 0x32: case 0x33: case 0x34:
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case 0x35: case 0x36: case 0x37: case 0x38: case 0x39:
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switch(state) {
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case ST_TAILSPACE:
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case ST_AFTERVALUE:
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if(opt_oid_text_end)
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*opt_oid_text_end = oid_text;
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errno = EINVAL; /* "1. 1" => broken OID */
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return -1;
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case ST_LEADSPACE:
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case ST_WAITDIGITS:
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_OID_CAPTURE_ARC(oid_text, oid_end);
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state = ST_AFTERVALUE;
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continue;
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}
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break;
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default:
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/* Unexpected symbols */
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state = ST_WAITDIGITS;
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break;
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} /* switch() */
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break;
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} /* for() */
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|
|
|
|
if(opt_oid_text_end) *opt_oid_text_end = oid_text;
|
|
|
|
/* Finalize last arc */
|
|
switch(state) {
|
|
case ST_LEADSPACE:
|
|
return 0; /* No OID found in input data */
|
|
case ST_WAITDIGITS:
|
|
errno = EINVAL; /* Broken OID */
|
|
return -1;
|
|
case ST_AFTERVALUE:
|
|
case ST_TAILSPACE:
|
|
return num_arcs;
|
|
}
|
|
|
|
errno = EINVAL; /* Broken OID */
|
|
return -1;
|
|
}
|