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/*********************************************************************
######################################################################
##
## Created by: Denis Filatov
##
## Copyleft (c) 2015
## This code is provided under the CeCill-C license agreement.
######################################################################
*********************************************************************/
#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <stdio.h>
#include "../cxml/cxml.h"
#include "../cshared/copts.h"
#include "../cshared/cserialize.h"
#include "../cshared/cstr.h"
#include "ecc_api.h"
#include "mkgmtime.h"
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
#include <limits.h>
#include <time.h>
#include <math.h>
#if defined(__CYGWIN__)
#define floorl(X) __builtin_floor(X)
#endif
//#define DEBUG_BOOKMARKS
//#define DEBUG_DATA
#define MAX_BOOKMARKS 16
typedef struct bookmark_t bookmark_t;
struct bookmark_t {
bookmark_t * prev;
char * ptr;
};
typedef enum {
si_self,
si_digest,
si_certificate,
si_certificate_chain,
si_digest_with_other_algorithm,
si_other
} SignerInfoType;
typedef struct cert_cxml_handler_t
{
cxml_handler_t h;
unsigned int subject_type;
int signer_type;
const char * signer;
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int vr_type;
int sa_type;
void * verificationKey;
void * encryptionKey;
int pk_alg;
int pk_sym_alg;
int pk_ptype;
char * pk_data;
int pk_datasize;
char * buf;
char * ptr;
const char * end;
char * bookmarks[MAX_BOOKMARKS];
int bidx;
unsigned int nTmpValue;
void * key;
}cert_cxml_handler_t;
static void bookmark_position(cert_cxml_handler_t * const h, const cxml_tag_t * tag)
{
if (h->bidx >= MAX_BOOKMARKS){
fprintf(stderr, "FATAL: Profile is tooooooo complicated!!!\n");
exit(-1);
}
h->bookmarks[h->bidx] = h->ptr;
h->bidx++;
h->ptr++;
#ifdef DEBUG_BOOKMARKS
printf("BOOKMARK 0x%08X (%s)\n", (unsigned int)h->ptr, tag->name);
#endif
}
static int apply_bookmark_size(cert_cxml_handler_t * const h, const cxml_tag_t * tag)
{
int size, bcount;
char * psize;
if (h->bidx == 0){
fprintf(stderr, "FATAL: Inconsistent bookmarks!!!\n");
exit(-1);
}
psize = h->bookmarks[--h->bidx];
size = h->ptr - psize - 1;
#ifdef DEBUG_BOOKMARKS
printf("APPLY 0x%08X [%d] (%s)\n", (unsigned int)h->ptr, size, tag->name);
#endif
bcount = cintx_bytecount(size);
if (bcount == 1){
*(unsigned char*)psize = size;
size = 0;
}
else{
memmove(psize + bcount, psize + 1, h->ptr - psize - 1);
h->ptr += bcount - 1;
size = cintx_write(size, &psize, psize + bcount, NULL);
}
return size; // size is overridden to be 0 or -1
}
static int attribute_public_key_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int attribute_eccpoint_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int attribute_eccpoint_text (cxml_handler_t* const h, char * const text, int length);
static int attribute_assurance_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int attribute_aid_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int attribute_ssp_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int attribute_ssp_text (cxml_handler_t* const h, char * const text, int length);
static const cxml_taghandler_t h_publickey[] = {
{ "eccpoint", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ "ecc-point", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ "ecc_point", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ NULL }
};
static const cxml_taghandler_t h_attribute[] = {
{ "public-key", attribute_public_key_tag, NULL, h_publickey },
{ "public_key", attribute_public_key_tag, NULL, h_publickey },
{ "publickey", attribute_public_key_tag, NULL, h_publickey },
{ "eccpoint", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ "ecc-point", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ "ecc_point", attribute_eccpoint_tag, attribute_eccpoint_text, NULL },
{ "assurance", attribute_assurance_tag, NULL, NULL },
{ "aid", attribute_aid_tag, NULL, NULL },
{ "ssp", attribute_ssp_tag, attribute_ssp_text, NULL },
{NULL}
};
static int subject_attribute_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static const cxml_taghandler_t h_subject[] = {
{"attribute", subject_attribute_tag, NULL, h_attribute},
{NULL}
};
static int location_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static const cxml_taghandler_t h_location_list [] = {
{"location", location_tag, NULL, NULL },
{NULL}
};
static int region_none_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_circle_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_rectangle_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_polygon_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_id_tag(cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_region_tag(cxml_handler_t* const h, cxml_tag_t * const tag);
static int region_region_text(cxml_handler_t* const h, char * const text, int length);
static const cxml_taghandler_t h_restriction[] = {
{"region", region_region_tag, region_region_text, NULL },
{"none", region_none_tag, NULL, NULL },
{"circle", region_circle_tag, NULL, NULL },
{"rectangle", region_rectangle_tag, NULL, h_location_list },
{"polygon", region_polygon_tag, NULL, h_location_list },
{"id", region_id_tag, NULL, NULL },
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{NULL}
};
static int validity_restriction_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static const cxml_taghandler_t h_validity[] = {
{"restriction", validity_restriction_tag, NULL, h_restriction },
{NULL}
};
static int certificate_version_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int certificate_version_text(cxml_handler_t* const h, char * const text, int length);
static int certificate_signer_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int certificate_signer_text(cxml_handler_t* const h, char * const text, int length);
static int certificate_subject_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int certificate_validity_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static int certificate_signature_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static const cxml_taghandler_t h_certificate[] = {
{"version", certificate_version_tag, certificate_version_text, NULL },
{"signer", certificate_signer_tag, certificate_signer_text, NULL },
{"subject", certificate_subject_tag, NULL, h_subject },
{"validity", certificate_validity_tag, NULL, h_validity },
{"signature", certificate_signature_tag, NULL, h_validity },
{NULL}
};
static int root_certificate_tag (cxml_handler_t* const h, cxml_tag_t * const tag);
static const cxml_taghandler_t h_root[] = {
{"certificate", root_certificate_tag, NULL, h_certificate },
{NULL}
};
static int _Begin_Tag(cxml_handler_t* const h, cxml_tag_t * const tag);
static int _End_Tag(cxml_handler_t* const h, cxml_tag_t * const tag);
static int _Text(cxml_handler_t* const h, char * const text, int length);
static cxml_handler_class Class = {
sizeof(cert_cxml_handler_t),
NULL, NULL,
_Begin_Tag, _End_Tag,
_Text
};
#define STR2ENUM(N,V) _str_2_enum(N, sizeof(N)/sizeof(N[0]), V)
static int _str_2_enum(const char ** values, size_t size, const char * v)
{
while (*v && cisspace(*v))v++;
if (*v){
size_t i;
for (i = 0; i<size; i++){
if (values[i] && 0 == strcmp(values[i], v)) {
return i;
}
}
if (cisdigit(*v)){
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return strtoul(v, NULL, 0);
}
}
return -1;
}
#ifdef DEBUG_DATA
static void print_x(FILE * f, const char * ptr, int len)
{
const unsigned char * e = (const unsigned char *)(ptr + len);
for (; ptr < e; ptr++){
unsigned char c = *ptr;
fprintf(f, "%02X", c);
}
}
#endif
static unsigned int _convert_time(const char * v);
static const char *_outPath = ".";
static const char *_searchPath = NULL;
static const char *_certName = NULL;
static char *_profileName = NULL;
static const char *_signerName = NULL;
static unsigned int _defaultTime = 0;
static ecc_format _outFormat = 0;
static const char * _verificationKey = NULL;
static const char * _decriptionKey = NULL;
static const char * _keyPath = NULL;
static int _reuseKeys = 0;
static long _refLat = 0;
static long _refLon = 0;
static const long double _latTMDPerMetter = 180.0 / M_PI / 0.6378;
static long double _lonTMDPerMetter = 180.0 / M_PI / 0.6378;
static const char * _cfgFile = NULL;
static void _setup_default_time()
{
time_t t;
struct tm * ptm;
struct tm tm = {0};
memset(&tm, 0, sizeof(tm));
time(&t);
ptm = gmtime(&t);
tm.tm_mday = 1;
tm.tm_year = ptm->tm_year;
_defaultTime = mkitstime32(&tm);
}
static int _time_option(const copt_t * opt, const char * option, const copt_value_t * value)
{
_defaultTime = _convert_time(value->v_str);
return (_defaultTime == (unsigned int)-1) ? -1 : 0;
}
static int _refPoint_option(const copt_t * opt, const char * option, const copt_value_t * value)
{
char * e;
long double lat, lon;
lat = strtold(value->v_str, &e);
lon = strtold(e + 1, &e);
if (*e == 0){
if (lat <= 90.0 && lat >= -90.0) lat *= 10000000.0; // degree
_refLat = (int32_t)floorl(lat);
if (lon <= 180.0 && lon >= -180.0) lon *= 10000000.0; // degree
_refLon = (int32_t)floorl(lon);
_lonTMDPerMetter = 180.0 / M_PI / 0.6378 / cos((lat/10000000.0) * M_PI / 180.0);
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return 0;
}
}
return -1;
}
static const char * _o_formats[] = {
"bin", "hex", "pem", NULL
};
static copt_t options [] = {
{ "h?", "help", COPT_HELP, NULL, "Print this help page" },
{ "C", "config", COPT_CFGFILE, (void*)&_cfgFile, "Config file path [no cfg file]" },
{ "o", "out", COPT_STR, (void*)&_outPath, "Output path [current dir by default]" },
{ "O", "format", COPT_STRENUM, (void*)_o_formats, "Output format (bin|hex|pem)[binary by default]" },
{ "S", "certs", COPT_STR, (void*)&_searchPath, "Certificates search path [Output path by default]" },
{ "K", "keys", COPT_STR, (void*)&_keyPath, "Private key storage path [Output path by default]" },
{ "R", "reuse", COPT_BOOL, (void*)&_reuseKeys, "Reuse existing key pair [regenerate by default]" },
{ "n", "name", COPT_STR, (void*)&_certName, "Certificate name (take from profile by default)" },
{ "v", "vkey", COPT_STR, (void*)&_verificationKey, "Verification public key (generate key pair by default)" },
{ "e", "ekey", COPT_STR, (void*)&_decriptionKey, "Decription public key (generate key pair if neccessary)" },
{ "s", "signer", COPT_STR, (void*)&_signerName, "Signer certificate name [take from profile by default]" },
{ "t", "reftime", COPT_STR | COPT_CALLBACK, (void*)&_time_option, "Reference UTC time point (YYY-DD-MM) [current date]" },
{ "l", "reflocation", COPT_STR | COPT_CALLBACK, (void*)&_refPoint_option, "Reference location in form <lat>:<lon> [0.0:0.0]" },
// { "c", "chain", COPT_BOOL , &_createChain, "Produce a text file for ITS Test Suite" },
{ NULL, NULL, COPT_END, NULL, NULL }
};
int main(int argc, char ** argv)
{
FILE *f;
int rc;
cert_cxml_handler_t * h = cxml_st_handler_new(&Class, h_root);
h->vr_type = -1;
h->sa_type = -1;
// set default time to the begining of this year
_setup_default_time();
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argc = coptions(argc, argv, COPT_HELP_NOVALUES , options);
if(argc < 2){
if(argc<0 && (0-argc)<((sizeof(options)/sizeof(options[0]))-1)){
printf("Unknown option %s\n", argv[0-argc]);
}
const char * a = strrchr(argv[0], '/');
if (a == NULL) a = argv[0];
coptions_help(stdout, a, COPT_HELP_NOVALUES, options, "<profile> [signer]");
return -1;
}
if (_searchPath == NULL) _searchPath = _outPath;
if (_keyPath == NULL) _keyPath = _outPath;
_outFormat = copts_enum_value(options, 3, _o_formats);
if (_defaultTime == 0){
//set it to begining of this year
time_t t = time(NULL);
struct tm tm;
struct tm * ptm = gmtime(&t);
memcpy(&tm, ptm, sizeof(tm));
tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
tm.tm_mday = 1; tm.tm_mon = 0;
_defaultTime = mkitstime32(&tm);
}
if(argc > 2){
// set signer certificate file name
_signerName = argv[2];
}
f = fopen(argv[1], "rb");
if(f == NULL){
fprintf(stderr, "%s: Certificate profile not found\n", argv[1]);
return -1;
}else{
if(ecc_api_init()){
return -1;
}
_profileName = cstrdup(cstrlastpathelement(argv[1]));
if(_profileName){
char * p = strrchr(_profileName, '.');
if(p) *p = 0;
}
rc = cxml_handler_parse_stream(&h->h, f);
if (rc == -1){
fprintf(stderr, "%s Profile parsing error\n", argv[1]);
return -1;
}
fclose(f);
ecc_api_done();
}
return 0;
}
static int root_certificate_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
if(_certName == NULL){
_certName = cxml_tag_attr_value(tag, "name");
if(_certName == NULL){
_certName = _profileName;
}
else if (!cstrequal(_certName, _profileName)){
fprintf(stderr, "WARNING: %s.xml: profile name differs from certificate name '%s'\n", _profileName, _certName);
}
}
h->ptr = h->buf = malloc(4096);
h->end = h->buf + 4096;
if (cxml_tag_attr_boolean(tag, "keep-existing")){
FILE * f;
char * path = h->ptr;
cvstrncpy(path, h->end - path, _outPath, "/", _certName, ".crt", NULL);
f = fopen(path, "r+b");
if (f){
fclose(f);
free(h->buf);
return CXML_RETURN_STOP;
}
}
}else{
FILE * f;
char * path;
path = h->ptr;
cvstrncpy(path, h->end-path, _outPath, "/", _certName, ".crt", NULL);
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f = fopen(path, "wb");
if (!f){
fprintf(stderr, "ERROR: Certificate write failed to '%s'\n", path);
}else{
if (_outFormat == 0){
fwrite(h->buf, 1, h->ptr - h->buf, f);
}else{ // hex or pem format
const unsigned char * p = (const unsigned char *)h->buf;
for (; p < (const unsigned char *)h->ptr; p++){
fprintf(f, "%02X", *p);
}
}
fclose(f);
}
if (h->verificationKey){
if (_verificationKey == NULL && _reuseKeys == 0){
cvstrncpy(path, h->end - path, _keyPath, "/", _certName, ".vkey", NULL);
ecc_api_key_private_save(h->verificationKey, path, _outFormat);
cvstrncpy(path, h->end - path, _keyPath, "/", _certName, ".vpkey", NULL);
ecc_api_key_public_save(h->verificationKey, path, _outFormat);
}
}
if (h->encryptionKey){
if (_decriptionKey == NULL && _reuseKeys == 0){
cvstrncpy(path, h->end - path, _keyPath, "/", _certName, ".ekey", NULL);
ecc_api_key_private_save(h->encryptionKey, path, _outFormat);
cvstrncpy(path, h->end - path, _keyPath, "/", _certName, ".epkey", NULL);
ecc_api_key_public_save(h->encryptionKey, path, _outFormat);
}
}
free(h->buf);
}
return 0;
}
static int certificate_version_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
h->nTmpValue = 2;
const char * v = cxml_tag_attr_value(tag, "version");
if(v == NULL)v = cxml_tag_attr_value(tag, "value");
if(v){
while(cisspace(*v))v++;
h->nTmpValue = strtoul(v, NULL, 0);
}
}else{
cint8_write(h->nTmpValue, &h->ptr, h->end, &rc);
}
return rc;
}
static int certificate_version_text(cxml_handler_t* const _h, char * const text, int length)
{
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if(text){
const char * p = text;
while(*p && cisspace(*p))p++;
if(*p) h->nTmpValue = strtoul(p, NULL, 0);
}
return 0;
}
static const char * _signer_types [] = {
"self",
"digest",
"certificate",
"other",
};
static size_t load_certificate(const char * path, char * ptr, const char * e)
{
FILE *f;
size_t size;
char * cert = ptr;
f = fopen(path, "rb");
if (f == NULL){
perror(path);
return -1;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
fseek(f, 0, SEEK_SET);
if (size < 67){
fprintf(stderr, "%s: File too small\n", path);
return -1;
}
if (size > (size_t)(e - cert)){
fprintf(stderr, "%s: no enough space\n", path);
return -1;
}
if (size != fread(cert, 1, size, f)){
perror(path);
return -1;
}
fclose(f);
if (cert[0] != 2) {
char * c = cstr_hex2bin(cert, size, cert, size);
if (c){
size = c - cert;
}
}
return size;
}
static const char * _pk_algorithms[] = {
[0] = "ecdsa_nistp256_with_sha256",
[1] = "ecies_nistp256",
};
static const char * _sym_algorithms[] = {
[0] = "aes_128_ccm",
};
static const char * _point_types[] = {
[0] = "x_coordinate_only",
[1] = "compressed",
[2] = "compressed_y0",
[3] = "compressed_y1",
[4] = "uncompressed"
};
static int certificate_signer_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
// write signer info
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
h->signer_type = si_digest; // digest by default
v = cxml_tag_attr_value(tag, "type");
if(v){
h->signer_type = STR2ENUM(_signer_types, v);
fprintf(stderr, "%s: Unknown signer type\n", v);
return -1;
}
}
cint8_write(h->signer_type, &h->ptr, h->end, &rc);
if (_signerName){
h->signer = _signerName;
}
else{
if (h->signer_type == si_digest || h->signer_type == si_digest_with_other_algorithm){
h->signer_digest = cxml_tag_attr_value(tag, "digest");
if (h->signer_type == si_digest_with_other_algorithm){
int alg;
v = cxml_tag_attr_value(tag, "algorithm");
if (v == NULL) {
fprintf(stderr, "Signing algorithm shall be provided\n");
return -1;
}
alg = STR2ENUM(_pk_algorithms, v);
if (alg < 0){
fprintf(stderr, "%s: Unknown public key algorithm\n", v);
return -1;
}
cint8_write(alg, &h->ptr, h->end, &rc);
}
}
if (h->signer_digest == NULL){
v = cxml_tag_attr_value(tag, "name");
if (v == NULL){
fprintf(stderr, "%s: Signer name or digest shall be provided\n", v);
return -1;
}
h->signer = v;
}
if (h->signer_type == si_certificate_chain ||
h->signer_type >= si_other){
bookmark_position(h, tag);
}
}
}else{
// write signer info
if (h->signer_type > si_self){
if (h->signer_type < si_other) {
if (h->signer_digest){
int len = strlen(h->signer_digest);
v = cstr_hex2bin(h->ptr, h->end - h->ptr, h->signer_digest, len);
if (v == NULL){
fprintf(stderr, "%s: no more space to write digest of size %d bytes\n", v, len);
return -1;
}
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char * path, *cname;
int plen;
cname = (char*)h->signer;
while (*cname){
char * se = strchr(cname, ' ');
if (se){
*se = 0;
while (cisspace(*se))se++;
}
else se = cstrend(cname);
h->signer = cname;
// load signer certificate
plen = strlen(_searchPath) + (se - cname);
path = malloc(plen + 16);
cvstrncpy(path, plen + 16, _searchPath, "/", cname, ".crt", NULL);
size_t size = load_certificate(path, h->ptr, h->end);
if (size < 0){
fprintf(stderr, "%s: signer certificate not found or error\n", h->signer);
rc = -1;
}
else{
// digests
if (h->signer_type == si_digest || h->signer_type == si_digest_with_other_algorithm){
char hash[sha256_hash_size];
// change eccpoint type of the signature to x_coordinate_only(0)
// to follow canonical encoding
h->ptr[size - 65] = 0;
sha256_calculate(hash, h->ptr, size);
#ifdef DEBUG_DATA
fprintf(stderr, "HASH (%s): ", h->signer);
print_x(stderr, hash, sha256_hash_size);
fprintf(stderr, "\n");
fprintf(stderr, "DIGEST (%s): ", h->signer);
print_x(stderr, &hash[sha256_hash_size - 8], 8);
fprintf(stderr, "\n");
cbuf_write(hash + sha256_hash_size - 8, 8, &h->ptr, h->end, &rc);
}
else {// certificate or chain
h->ptr += size;
if (h->signer_type == si_certificate_chain){
cname = se;
continue;
}
}
}
// continue only if certificate chain
break;
}
if (h->signer_type == si_certificate_chain || h->signer_type >= si_other) {
apply_bookmark_size(h, tag);
}
}
}
return rc;
}
static int certificate_signer_text(cxml_handler_t* const _h, char * const text, int length)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (h->signer_type >= si_other) {
cbuf_write(text, length, &h->ptr, h->end, &rc);
}
return rc;
}
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static const char * _subject_type [] = {
"EC", "AT", "AA", "EA", "ROOT", "CRL"
};
typedef struct list_pointer_t
{
unsigned char * ptr;
unsigned char cnt;
}list_pointer_t;
static int certificate_subject_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
// write signer info
if (cxml_tag_is_open(tag)){
int len;
const char * v = cxml_tag_attr_value(tag, "type");
if(v == NULL){
fprintf(stderr, "Subject type must be set in Certificate profile\n");
return -1;
}
h->subject_type = STR2ENUM(_subject_type, v);
if(h->subject_type < 0) {
fprintf(stderr, "%s: Unknown subject type\n", v);
return -1;
}
cint8_write(h->subject_type, &h->ptr, h->end, &rc);
v = cxml_tag_attr_value(tag, "name");
len = cstrlen(v);
if(0 == cintx_write(len, &h->ptr, h->end, &rc) && len > 0){
cbuf_write(v, len, &h->ptr, h->end, &rc);
}
bookmark_position(h, tag);
}else{
apply_bookmark_size(h, tag);
}
return rc;
}
static const char * _subject_attribute_types[] = {
[0] = "verification_key",
[1] = "encryption_key",
[2] = "assurance_level",
[3] = "reconstruction_value",
[32] = "its_aid_list",
[33] = "its_aid_ssp_list"
};
static int subject_attribute_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
const char * v = cxml_tag_attr_value(tag, "type");
int atype;
if(v == NULL){
fprintf(stderr, "Attribute type must be set\n");
return -1;
}
atype = STR2ENUM(_subject_attribute_types, v);
if(atype < 0) {
fprintf(stderr, "%s: Unknown attribute type\n", v);
return -1;
}
cint8_write(atype, &h->ptr, h->end, &rc);
h->sa_type = atype;
const char * keyPath = _verificationKey;
switch (h->sa_type){
case 1: // encryption_key
keyPath = _decriptionKey;
case 0: //verificationKey
if (keyPath){
h->key = ecc_api_key_public_load(keyPath, 0);
if (h->key == NULL){
fprintf(stderr, "%s: Can't load public key\n", keyPath);
return -1;
}
}
else if (_reuseKeys){
cvstrncpy(h->ptr, h->end - h->ptr, _keyPath, "/", _certName,
".", h->sa_type ? "e" : "v", "key", NULL);
h->key = ecc_api_key_private_load(h->ptr, 0);
if (h->key == NULL){
_reuseKeys = 0;
}
}
break;
case 32: //its_aid_list
case 33: //its_aid_ssp_list
bookmark_position(h, tag);
break;
};
}else{
switch(h->sa_type){
case 0: // verification_key
h->verificationKey = h->key;
h->key = NULL;
break;
case 1: // encryption_key
h->encryptionKey = h->key;
h->key = NULL;
break;
case 32: //its_aid_list
case 33: //its_aid_ssp_list
apply_bookmark_size(h, tag);
break;
}
if(h->key){
ecc_api_key_free(h->key);
}
h->sa_type = -1;
}
return rc;
}
static int attribute_public_key_tag(cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
int alg = 0, sym_alg = 0;
const char * v = cxml_tag_attr_value(tag, "algorithm");
if (v) {
alg = STR2ENUM(_pk_algorithms, v);
if (alg < 0){
fprintf(stderr, "%s: Unknown public key algorithm\n", v);
return -1;
}
}
cint8_write(alg, &h->ptr, h->end, &rc);
v = cxml_tag_attr_value(tag, "point-type");
if (v){
h->pk_ptype = STR2ENUM(_point_types, v);
if (h->pk_ptype < 0){
fprintf(stderr, "%s: Unknown point type\n", v);
return -1;
}
if (h->pk_ptype == 1) h->pk_ptype = 2;
}
switch (alg){
case 0:
break;
case 1:
v = cxml_tag_attr_value(tag, "sym_alg");
if (v){
sym_alg = STR2ENUM(_sym_algorithms, v);
if (sym_alg < 0){
fprintf(stderr, "%s: Unknown symmetric algorithm\n", v);
return -1;
}
}
cint8_write(sym_alg, &h->ptr, h->end, &rc);
break;
default:
bookmark_position(h, tag);
break;
}
h->pk_alg = alg;
h->pk_sym_alg = sym_alg;
}
else{
if (h->pk_alg > 1){
apply_bookmark_size(h, tag);
}
h->pk_alg = -1;
h->pk_sym_alg = -1;
}
return rc;
}
static int attribute_eccpoint_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
int pointtype;
if (cxml_tag_is_open(tag)){
const char * v;
pointtype = 0;
v = cxml_tag_attr_value(tag, "type");
if (v){
pointtype = STR2ENUM(_point_types, v);
if (pointtype < 0){
fprintf(stderr, "%s: Unknown point type\n", v);
return -1;
}
if (pointtype == 1) pointtype = 2;
}
h->pk_ptype = pointtype;
h->pk_data = NULL;
h->pk_datasize = 0;
}
else{
void * key = h->key;
pointtype = h->pk_ptype;
// generate private and public key pair
char x[32], y[32];
if (key == NULL){
if (h->pk_data){
if (h->pk_datasize < 32 || (h->pk_datasize < 64 && pointtype == 4)){
fprintf(stderr, "Insufficient size of public key\n");
return -1;
}
key = ecc_api_key_public_set(h->pk_alg, pointtype, h->pk_data, h->pk_data + 32);
}
else{
// generate PK
if (h->pk_alg < 0 || h->pk_sym_alg < 0){
fprintf(stderr, "Public key algorythm must be specified\n");
return -1;
}
key = ecc_api_key_gen(h->pk_alg, h->pk_sym_alg);
}
}
if (key){
h->key = key;
rc = ecc_api_key_public(key, &x[0], &y[0]);
if (rc >= 0){
if (pointtype == 2) pointtype |= (y[31] & 1);
cint8_write(pointtype, &h->ptr, h->end, &rc);
if (rc == 0)cbuf_write(&x[0], 32, &h->ptr, h->end, &rc);
if (rc == 0 && pointtype == 4){
cbuf_write(&y[0], 32, &h->ptr, h->end, &rc);
}
}
}
if (h->pk_data){
free(h->pk_data);
h->pk_data = NULL;
}
}
return rc;
}
static int attribute_eccpoint_text(cxml_handler_t* const _h, char * const text, int length)
{
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (h->pk_data == NULL){
h->pk_data = malloc(64);
h->pk_datasize = 0;
}
char * e = cstr_hex2bin(h->pk_data + h->pk_datasize, 64 - h->pk_datasize, text, length);
h->pk_datasize = e - h->pk_data;
return 0;
}
static int attribute_assurance_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
uint8_t assurance = 0;
const char * v = cxml_tag_attr_value(tag, "level");
if(v){
while(*v && cisspace(*v))v++;
if(*v){
long n = strtol(v, NULL, 0);
if(n<0 || n > 7){
fprintf(stderr, "%s: Invalid assurance level\n", v);
return -1;
}
assurance |= n<<5;
}
}
v = cxml_tag_attr_value(tag, "confidence");
if(v){
while(*v && cisspace(*v))v++;
if(*v){
long n = strtol(v, NULL, 0);
if(n<0 || n > 3){
fprintf(stderr, "%s: Invalid assurance confidence\n", v);
return -1;
}
assurance |= n;
}
}
cint8_write(assurance, &h->ptr, h->end, &rc);
}
return rc;
}
static int attribute_aid_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if(0 == (tag->type & CXML_TAG_OPEN)){
const char * v = cxml_tag_attr_value(tag, "value");
if(NULL == v)v = cxml_tag_attr_value(tag, "aid");
if(NULL == v){
fprintf(stderr, "WARNING: Value required for AID tag. Item was skiped.\n");
}else{
uint32_t n;
while(cisspace(*v))v++;
if(!cisdigit(*v)){
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fprintf(stderr, "ERROR: Invalid AID '%s'\n", v);
rc = -1;
}else{
n = strtoul(v, NULL, 0);
cintx_write(n, &h->ptr, h->end, &rc);
}
}
}
return rc;
}
static int attribute_ssp_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
uint32_t n;
const char * v = cxml_tag_attr_value(tag, "aid");
if(NULL == v){
fprintf(stderr, "ERROR: AID shall be supplied for SSP.\n");
return -1;
}
while(cisspace(*v))v++;
if(!cisdigit(*v)){
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fprintf(stderr, "ERROR: Invalid AID '%s' in SSP\n", v);
return -1;
}
n = strtoul(v, NULL, 0);
cintx_write(n, &h->ptr, h->end, &rc);
bookmark_position(h, tag);
}else{
// write ssp buffer data
apply_bookmark_size(h, tag);
}
return rc;
}
static int attribute_ssp_text(cxml_handler_t* const _h, char * const text, int length)
{
int rc=0;
if(text && length){
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
rc = cbuf_write(text, length, &h->ptr, h->end, NULL);
}
return rc;
}
static int certificate_validity_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
bookmark_position(h, tag);
rc = 0;
}else{
rc = apply_bookmark_size(h, tag);
}
return rc;
}
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static unsigned int _convert_diff_time(const char * v)
{
unsigned int ret = 0;
const char * p = v;
char * e;
int mult = 1;
switch (*p){
case '-':
mult = -1;
case '+':
p++;
}
for (;;){
unsigned int n;
n = strtoul(p, &e, 10);
if (n == ULONG_MAX) break;
if (cisalnum(*e)){
switch (*e){
case 'd': n *= 24;
case 'h': n *= 60;
case 'm': n *= 60;
case 's': e++; break;
default:
fprintf(stderr, "%s: Unknown time modificator: '%c'\n", p, *e);
return INT32_MIN;
}
}
else{
// consider n as days
n *= 24 * 3600;
}
ret += n;
if (cisdigit(*e)){
p = e;
continue;
}
break;
}
return ret * mult;
}
static unsigned int _convert_time2(const char * v, unsigned int baseTime)
{
unsigned int ret;
char * e;
struct tm tm;
// can be a difference from the base time point
if (*v == '-' || *v == '+'){
if (baseTime == 0){
fprintf(stderr, "Default time must be set\n");
return 0;
}
ret = _convert_diff_time(v);
if (ret == INT32_MIN)
return 0;
ret = baseTime + ret;
}
else{
// next try load as integer seconds since epoch
ret = strtoul(v, &e, 0);
if (ret == ULONG_MAX || *e){
ret = 0;
memset(&tm, 0, sizeof(tm));
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// check predefined values
if ((e = cstrisprefix(v, "today"))){
time_t t;
struct tm * ptm;
time(&t); ptm = gmtime(&t);
tm.tm_year = ptm->tm_year; tm.tm_mon = ptm->tm_mon; tm.tm_mday = ptm->tm_mday;
}
else if ((e = cstrisprefix(v, "ybegin"))){
time_t t;
struct tm * ptm;
time(&t); ptm = gmtime(&t);
tm.tm_year = ptm->tm_year; tm.tm_mon = 0; tm.tm_mday = 1;
}
else if ((e = cstrisprefix(v, "yend"))){
time_t t;
struct tm * ptm;
time(&t); ptm = gmtime(&t);
tm.tm_year = ptm->tm_year+1; tm.tm_mon = 0; tm.tm_mday = 1;
}
//next try to convert ISO text representation
else if (3 == sscanf(v, "%d-%d-%d", &tm.tm_year, &tm.tm_mon, &tm.tm_mday)){
tm.tm_mon--; // STARTED FROM 0
tm.tm_year -= 1900;
e = (char*)v; // to prevent next check for '-/+'
}
else{
fprintf(stderr, "%s: Date format specification error. Use YYY-MM-DD or today+/-NNNd\n", v);
return 0;
}
ret = mkitstime32(&tm);
if (ret == (time_t)-1) {
fprintf(stderr, "%s: Date format specification error. Use YYY-MM-DD or today+/-NNNd\n", v);
ret = 0;
}
if (*e == '-' || *e == '+'){
ret = _convert_time2(e, ret);
}
}
}
return ret;
}
static unsigned int _convert_time(const char * v)
{
return _convert_time2(v, _defaultTime);
}
static int validity_restriction_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
int vr_type = -1;
int nTime;
const char * v = cxml_tag_attr_value(tag, "type");
const char *start, *end, *duration;
if(NULL == v){
fprintf(stderr, "ERROR: Restriction shall have a type.\n");
return -1;
}
while(cisspace(*v))v++;
if(0 == strcmp("time", v)){
start = cxml_tag_attr_value(tag, "start");
end = cxml_tag_attr_value(tag, "end");
duration = cxml_tag_attr_value(tag, "duration");
if(end && *end){
vr_type = (start && *start) ? 1 : 0;
}else if(start && *start && duration && *duration){
vr_type = 2;
}else{
fprintf(stderr, "ERROR: Either end or start and duration shall be specified for time restriction.\n");
return -1;
}
}else if(0 == strcmp("region", v)){
vr_type = 3;
}else if(cisdigit(*v)){
vr_type=strtoul(v, NULL,0);
}else{
fprintf(stderr, "%s: Unknown validity restriction type.\n", v);
return -1;
}
h->vr_type = vr_type;
cint8_write(vr_type, &h->ptr, h->end, &rc);
// save time restrictions
switch(vr_type){
case 1: /* time_start_and_end */
nTime = _convert_time(start);
cint32_write(nTime, &h->ptr, h->end, &rc);
case 0: /* time_end */
nTime = _convert_time(end);
cint32_write(nTime, &h->ptr, h->end, &rc);
break;
case 2: /* time_start_and_duration */
nTime = _convert_time(start);
cint32_write(nTime, &h->ptr, h->end, &rc);
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cint32_write(nTime, &h->ptr, h->end, &rc);
break;
case 3: /* region */
break;
default: // opaque
bookmark_position(h, tag); // for opaque data
}
}else{
if(h->vr_type > 3){
apply_bookmark_size(h, tag);
}
h->vr_type = -1;
}
return 0;
}
static int region_none_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
if (cxml_tag_is_open(tag)){
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
return cint8_write(0, &h->ptr, h->end, NULL);
}
return 0;
}
static int region_circle_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
//region type
if(0 == cint8_write(1, &h->ptr, h->end, NULL)){
//latitude and longitude
rc = location_tag (_h, tag);
if(0 == rc){
//radius
uint32_t n;
const char * v = cxml_tag_attr_value(tag, "radius");
if(NULL == v){
fprintf(stderr, "ERROR: radius shall be specified for circle.\n");
return -1;
}
n = strtoul(v, &e, 0);
if( (e[0] == 'k' || e[0] == 'K') && (e[1] == 'm' || e[1] == 'M') )
n *= 1000;
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if(n > 0xFFFF){
fprintf(stderr, "ERROR: %ul: radius is too big.\n", n);
return -1;
}
cint16_write(n, &h->ptr, h->end, &rc);
}
}
}
return rc;
}
static int region_rectangle_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
// region type
rc = cint8_write(2, &h->ptr, h->end, NULL);
if(0 == rc){
bookmark_position(h, tag);
}
}else{
rc = apply_bookmark_size(h, tag);
}
return rc;
}
static int region_polygon_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
// region type
rc = cint8_write(3, &h->ptr, h->end, NULL);
if(0 == rc){
bookmark_position(h, tag);
}
}else{
rc = apply_bookmark_size(h, tag);
}
return rc;
}
static int location_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
if (cxml_tag_is_open(tag)){
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
const char * v = cxml_tag_attr_value(tag, "mode");
absolute = cstrequal(v, "absolute");
v = cxml_tag_attr_value(tag, "latitude");
int relative = 1;
fprintf(stderr, "ERROR: Latitude must be specified for location.\n");
return -1;
}
e = NULL; d = strtold(v, &e);
if(e[0] == 'm' || (e[0] == 'k' && e[1] == 'm')){
if(e[0] == 'k') d*=1000.0;
d = d * _latTMDPerMetter;
}else{
if (d <= 90.0 && d >= -90.0) d *= 10000000.0; // degree
}
if (!absolute) d += _refLat;
lat = (int32_t)floorl(d);
v = cxml_tag_attr_value(tag, "longitude");
if(v == NULL){
fprintf(stderr, "ERROR: Longitude shall be specified for location.\n");
return -1;
}
e = NULL; d = strtold(v, &e);
if(e[0] == 'm' || (e[0] == 'k' && e[1] == 'm')){
if(e[0] == 'k') d*=1000.0;
// convert metters to degree
d = d * _lonTMDPerMetter;
}else{
if (d <= 180.0 && d >= -180.0) d *= 10000000.0; // degree
}
if (!absolute) d += _refLon;
lon = (int32_t)floorl(d);
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cint32_write(lat, &h->ptr, h->end, &rc);
cint32_write(lon, &h->ptr, h->end, &rc);
}
return rc;
}
static const char * _id_dictionaries[] = {
"iso_3166_1",
"un_stats",
};
static int region_id_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
int value = 0;
unsigned int uvalue = 0;
const char * v;
// region type
rc = cint8_write(4, &h->ptr, h->end, NULL);
// region dictionary. use 0 by default
v = cxml_tag_attr_value(tag, "dictionary");
if(v == NULL)v = cxml_tag_attr_value(tag, "dict");
if(v){
value = STR2ENUM(_id_dictionaries, v);
if(value<0){
fprintf(stderr, "%s: Unknown dictionary type\n", v);
return -1;
}
}
if(cint8_write(value, &h->ptr, h->end, NULL)){
return -1;
}
v = cxml_tag_attr_value(tag, "id");
if(v == NULL){
fprintf(stderr, "ERROR: Region identifier must be set\n");
return -1;
}
while(cisspace(*v))v++;
uvalue = strtoul(v, NULL, 0);
if(uvalue > 0xFFFF){
fprintf(stderr, "%s: Invalid region identifier\n", v);
return -1;
}
if(cint16_write(uvalue, &h->ptr, h->end, NULL)){
return -1;
}
uvalue = 0;
v = cxml_tag_attr_value(tag, "local");
if(v){
while(cisspace(*v))v++;
uvalue = strtoul(v, NULL, 0);
if(!cisdigit(*v) || uvalue > 0xFFFF){
fprintf(stderr, "%s: Invalid region identifier\n", v);
return -1;
}
}
cintx_write(uvalue, &h->ptr, h->end, &rc);
if(rc) return -1;
}
return rc;
}
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static const char * _region_types[] = {
[0] = "none",
[1] = "circle",
[2] = "rectangle",
[3] = "polygon",
[4] = "id"
};
static cxml_tag_f* _region_type_handlers[] = {
[0] = region_none_tag,
[1] = region_circle_tag,
[2] = region_rectangle_tag,
[3] = region_polygon_tag,
[4] = region_id_tag
};
static int region_region_tag(cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
const char * v;
v = cxml_tag_attr_value(tag, "type");
h->nTmpValue = STR2ENUM(_region_types, v);
if (h->nTmpValue < 0){
fprintf(stderr, "ERROR: unknown region type: %s\n", v);
return -1;
}
}
if (h->nTmpValue < sizeof(_region_type_handlers) / sizeof(_region_type_handlers[0])){
return _region_type_handlers[h->nTmpValue](_h, tag);
}
if (cxml_tag_is_open(tag)){
// region type
rc = cint8_write(h->nTmpValue, &h->ptr, h->end, NULL);
bookmark_position(h, tag);
} else{
apply_bookmark_size(h, tag);
}
return rc;
}
static int region_region_text(cxml_handler_t* const _h, char * const text, int length)
{
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
char * end;
// try to treat it as hex
end = cstr_hex2bin(h->ptr, h->end - h->ptr, text, length);
if (end){
h->ptr = end;
}
else{
if (length > (h->end - h->ptr)){
fprintf(stderr, "ERROR: region definition is tooooo big: %d bytes\n", length);
return -1;
}
h->ptr = cmemcpy(h->ptr, text, length);
}
return 0;
}
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static const char * _signature_algorithms[] = {
"ecdsa_nistp256_with_sha256",
};
static int certificate_signature_tag (cxml_handler_t* const _h, cxml_tag_t * const tag)
{
int rc = 0;
cert_cxml_handler_t * h = (cert_cxml_handler_t *)_h;
if (cxml_tag_is_open(tag)){
void * key;
int alg = 0;
if(h->signer_type == 0){
// self signed certificate
key = h->verificationKey;
if(!key){
fprintf(stderr, "ERROR: Verification key attribute was not provided for self-signed certificate\n");
return -1;
}
}else{
const char * v = cxml_tag_attr_value(tag, "algorithm");
if (v){
alg = STR2ENUM(_signature_algorithms, v);
if (alg < 0){
fprintf(stderr, "%s: Unknown signature algorithm\n", v);
return -1;
}
}
v = cxml_tag_attr_value(tag, "signer");
if (v){
h->signer = v;
}
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if (h->signer == NULL){
fprintf(stderr, "ERROR: Signer certificate name shall be provided\n");
return -1;
}
// load signer certificate
int plen = strlen(_searchPath) + strlen(h->signer);
char * path = malloc(plen + 16);
cvstrncpy(path, plen + 16, _searchPath, "/", h->signer, ".vkey", NULL);
key = ecc_api_key_private_load(path, alg);
if (key == NULL){
fprintf(stderr, "%s: Could not load issuing private key\n", path);
free(path);
return -1;
}
}
cint8_write(alg, &h->ptr, h->end, &rc);
rc = ecc_sign(key, h->buf, h->ptr - h->buf - 1, &h->ptr, h->end - h->ptr);
}
return rc;
}
static int _Begin_Tag(cxml_handler_t* const h, cxml_tag_t * const tag)
{
fprintf(stderr, "WARNING: %s: Unknown tag", tag->name);
return 0;
}
static int _End_Tag(cxml_handler_t* const h, cxml_tag_t * const tag)
{
return 0;
}
static int _Text(cxml_handler_t* const h, char * const text, int length)
{return 0;}