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/**
* Test the UTF-8 decoding routines
*
* author: Daniel Veillard
* copy: see Copyright for the status of this software.
*/
#include <stdio.h>
#include <string.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include "buf.h"
int lastError;
static void errorHandler(void *unused, xmlErrorPtr err) {
if ((unused == NULL) && (err != NULL) && (lastError == 0)) {
lastError = err->code;
}
}
char document1[100] = "<doc>XXXX</doc>";
char document2[100] = "<doc foo='XXXX'/>";
static void testDocumentRangeByte1(xmlParserCtxtPtr ctxt, char *document,
int len, char *data, int forbid1, int forbid2) {
int i;
xmlDocPtr res;
for (i = 0;i <= 0xFF;i++) {
lastError = 0;
xmlCtxtReset(ctxt);
data[0] = i;
res = xmlReadMemory(document, len, "test", NULL, 0);
if ((i == forbid1) || (i == forbid2)) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Byte 0x%02X: %c\n",
i, i);
}
else if ((i == '<') || (i == '&')) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect illegal char %c for Byte 0x%02X\n", i, i);
}
else if (((i < 0x20) || (i >= 0x80)) &&
(i != 0x9) && (i != 0xA) && (i != 0xD)) {
if ((lastError != XML_ERR_INVALID_CHAR) && (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Byte 0x%02X\n", i);
}
else if (res == NULL) {
fprintf(stderr,
"Failed to parse valid char for Byte 0x%02X : %c\n", i, i);
}
if (res != NULL)
xmlFreeDoc(res);
}
}
static void testDocumentRangeByte2(xmlParserCtxtPtr ctxt, char *document,
int len, char *data) {
int i, j;
xmlDocPtr res;
for (i = 0x80;i <= 0xFF;i++) {
for (j = 0;j <= 0xFF;j++) {
lastError = 0;
xmlCtxtReset(ctxt);
data[0] = i;
data[1] = j;
res = xmlReadMemory(document, len, "test", NULL, 0);
/* if first bit of first char is set, then second bit must too */
if ((i & 0x80) && ((i & 0x40) == 0)) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X\n",
i, j);
}
/*
* if first bit of first char is set, then second char first
* bits must be 10
*/
else if ((i & 0x80) && ((j & 0xC0) != 0x80)) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X\n",
i, j);
}
/*
* if using a 2 byte encoding then the value must be greater
* than 0x80, i.e. one of bits 5 to 1 of i must be set
*/
else if ((i & 0x80) && ((i & 0x1E) == 0)) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X\n",
i, j);
}
/*
* if third bit of first char is set, then the sequence would need
* at least 3 bytes, but we give only 2 !
*/
else if ((i & 0xE0) == 0xE0) {
if ((lastError == 0) || (res != NULL))
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x00\n",
i, j);
}
/*
* We should see no error in remaining cases
*/
else if ((lastError != 0) || (res == NULL)) {
fprintf(stderr,
"Failed to parse document for Bytes 0x%02X 0x%02X\n", i, j);
}
if (res != NULL)
xmlFreeDoc(res);
}
}
}
/**
* testDocumentRanges:
*
* Test the correct UTF8 character parsing in context of XML documents
* Those are in-context injection tests checking the parser behaviour on
* edge case values at different point in content, beginning and end of
* CDATA in text or in attribute values.
*/
static void testDocumentRanges(void) {
xmlParserCtxtPtr ctxt;
char *data;
/*
* Set up a parsing context using the first document as
* the current input source.
*/
ctxt = xmlNewParserCtxt();
if (ctxt == NULL) {
fprintf(stderr, "Failed to allocate parser context\n");
return;
}
printf("testing 1 byte char in document: 1");
fflush(stdout);
data = &document1[5];
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 1 byte injection at beginning of area */
testDocumentRangeByte1(ctxt, &document1[0], strlen(document1),
data, -1, -1);
printf(" 2");
fflush(stdout);
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 1 byte injection at end of area */
testDocumentRangeByte1(ctxt, &document1[0], strlen(document1),
data + 3, -1, -1);
printf(" 3");
fflush(stdout);
data = &document2[10];
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 1 byte injection at beginning of area */
testDocumentRangeByte1(ctxt, &document2[0], strlen(document2),
data, '\'', -1);
printf(" 4");
fflush(stdout);
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 1 byte injection at end of area */
testDocumentRangeByte1(ctxt, &document2[0], strlen(document2),
data + 3, '\'', -1);
printf(" done\n");
printf("testing 2 byte char in document: 1");
fflush(stdout);
data = &document1[5];
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 2 byte injection at beginning of area */
testDocumentRangeByte2(ctxt, &document1[0], strlen(document1),
data);
printf(" 2");
fflush(stdout);
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 2 byte injection at end of area */
testDocumentRangeByte2(ctxt, &document1[0], strlen(document1),
data + 2);
printf(" 3");
fflush(stdout);
data = &document2[10];
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 2 byte injection at beginning of area */
testDocumentRangeByte2(ctxt, &document2[0], strlen(document2),
data);
printf(" 4");
fflush(stdout);
data[0] = ' ';
data[1] = ' ';
data[2] = ' ';
data[3] = ' ';
/* test 2 byte injection at end of area */
testDocumentRangeByte2(ctxt, &document2[0], strlen(document2),
data + 2);
printf(" done\n");
xmlFreeParserCtxt(ctxt);
}
static void testCharRangeByte1(xmlParserCtxtPtr ctxt, char *data) {
int i = 0;
int len, c;
data[1] = 0;
data[2] = 0;
data[3] = 0;
for (i = 0;i <= 0xFF;i++) {
data[0] = i;
ctxt->charset = XML_CHAR_ENCODING_UTF8;
lastError = 0;
c = xmlCurrentChar(ctxt, &len);
if ((i == 0) || (i >= 0x80)) {
/* we must see an error there */
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Byte 0x%02X\n", i);
} else if (i == 0xD) {
if ((c != 0xA) || (len != 1))
fprintf(stderr, "Failed to convert char for Byte 0x%02X\n", i);
} else if ((c != i) || (len != 1)) {
fprintf(stderr, "Failed to parse char for Byte 0x%02X\n", i);
}
}
}
static void testCharRangeByte2(xmlParserCtxtPtr ctxt, char *data) {
int i, j;
int len, c;
data[2] = 0;
data[3] = 0;
for (i = 0x80;i <= 0xFF;i++) {
for (j = 0;j <= 0xFF;j++) {
data[0] = i;
data[1] = j;
ctxt->charset = XML_CHAR_ENCODING_UTF8;
lastError = 0;
c = xmlCurrentChar(ctxt, &len);
/* if first bit of first char is set, then second bit must too */
if ((i & 0x80) && ((i & 0x40) == 0)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X\n",
i, j);
}
/*
* if first bit of first char is set, then second char first
* bits must be 10
*/
else if ((i & 0x80) && ((j & 0xC0) != 0x80)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X: %d\n",
i, j, c);
}
/*
* if using a 2 byte encoding then the value must be greater
* than 0x80, i.e. one of bits 5 to 1 of i must be set
*/
else if ((i & 0x80) && ((i & 0x1E) == 0)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X: %d\n",
i, j, c);
}
/*
* if third bit of first char is set, then the sequence would need
* at least 3 bytes, but we give only 2 !
*/
else if ((i & 0xE0) == 0xE0) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x00\n",
i, j);
}
/*
* We should see no error in remaining cases
*/
else if ((lastError != 0) || (len != 2)) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X\n", i, j);
}
/*
* Finally check the value is right
*/
else if (c != (j & 0x3F) + ((i & 0x1F) << 6)) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X: expect %d got %d\n",
i, j, ((j & 0x3F) + ((i & 0x1F) << 6)), c);
}
}
}
}
static void testCharRangeByte3(xmlParserCtxtPtr ctxt, char *data) {
int i, j, k, K;
int len, c;
unsigned char lows[6] = {0, 0x80, 0x81, 0xC1, 0xFF, 0xBF};
int value;
data[3] = 0;
for (i = 0xE0;i <= 0xFF;i++) {
for (j = 0;j <= 0xFF;j++) {
for (k = 0;k < 6;k++) {
data[0] = i;
data[1] = j;
K = lows[k];
data[2] = (char) K;
value = (K & 0x3F) + ((j & 0x3F) << 6) + ((i & 0xF) << 12);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
lastError = 0;
c = xmlCurrentChar(ctxt, &len);
/*
* if fourth bit of first char is set, then the sequence would need
* at least 4 bytes, but we give only 3 !
*/
if ((i & 0xF0) == 0xF0) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X 0x%02X\n",
i, j, K, data[3]);
}
/*
* The second and the third bytes must start with 10
*/
else if (((j & 0xC0) != 0x80) || ((K & 0xC0) != 0x80)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X\n",
i, j, K);
}
/*
* if using a 3 byte encoding then the value must be greater
* than 0x800, i.e. one of bits 4 to 0 of i must be set or
* the 6th byte of data[1] must be set
*/
else if (((i & 0xF) == 0) && ((j & 0x20) == 0)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X\n",
i, j, K);
}
/*
* There are values in that range that are not allowed in XML-1.0
*/
else if (((value > 0xD7FF) && (value <0xE000)) ||
((value > 0xFFFD) && (value <0x10000))) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char 0x%04X for Bytes 0x%02X 0x%02X 0x%02X\n",
value, i, j, K);
}
/*
* We should see no error in remaining cases
*/
else if ((lastError != 0) || (len != 3)) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X 0x%02X\n",
i, j, K);
}
/*
* Finally check the value is right
*/
else if (c != value) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X 0x%02X: expect %d got %d\n",
i, j, data[2], value, c);
}
}
}
}
}
static void testCharRangeByte4(xmlParserCtxtPtr ctxt, char *data) {
int i, j, k, K, l, L;
int len, c;
unsigned char lows[6] = {0, 0x80, 0x81, 0xC1, 0xFF, 0xBF};
int value;
data[4] = 0;
for (i = 0xF0;i <= 0xFF;i++) {
for (j = 0;j <= 0xFF;j++) {
for (k = 0;k < 6;k++) {
for (l = 0;l < 6;l++) {
data[0] = i;
data[1] = j;
K = lows[k];
data[2] = (char) K;
L = lows[l];
data[3] = (char) L;
value = (L & 0x3F) + ((K & 0x3F) << 6) + ((j & 0x3F) << 12) +
((i & 0x7) << 18);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
lastError = 0;
c = xmlCurrentChar(ctxt, &len);
/*
* if fifth bit of first char is set, then the sequence would need
* at least 5 bytes, but we give only 4 !
*/
if ((i & 0xF8) == 0xF8) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X 0x%02X\n",
i, j, K, data[3]);
}
/*
* The second, third and fourth bytes must start with 10
*/
else if (((j & 0xC0) != 0x80) || ((K & 0xC0) != 0x80) ||
((L & 0xC0) != 0x80)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X 0x%02X\n",
i, j, K, L);
}
/*
* if using a 3 byte encoding then the value must be greater
* than 0x10000, i.e. one of bits 3 to 0 of i must be set or
* the 6 or 5th byte of j must be set
*/
else if (((i & 0x7) == 0) && ((j & 0x30) == 0)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char for Bytes 0x%02X 0x%02X 0x%02X 0x%02X\n",
i, j, K, L);
}
/*
* There are values in that range that are not allowed in XML-1.0
*/
else if (((value > 0xD7FF) && (value <0xE000)) ||
((value > 0xFFFD) && (value <0x10000)) ||
(value > 0x10FFFF)) {
if (lastError != XML_ERR_INVALID_CHAR)
fprintf(stderr,
"Failed to detect invalid char 0x%04X for Bytes 0x%02X 0x%02X 0x%02X 0x%02X\n",
value, i, j, K, L);
}
/*
* We should see no error in remaining cases
*/
else if ((lastError != 0) || (len != 4)) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X 0x%02X\n",
i, j, K);
}
/*
* Finally check the value is right
*/
else if (c != value) {
fprintf(stderr,
"Failed to parse char for Bytes 0x%02X 0x%02X 0x%02X: expect %d got %d\n",
i, j, data[2], value, c);
}
}
}
}
}
}
/**
* testCharRanges:
*
* Test the correct UTF8 character parsing in isolation i.e.
* not when parsing a full document, this is less expensive and we can
* cover the full range of UTF-8 chars accepted by XML-1.0
*/
static void testCharRanges(void) {
char data[5];
xmlParserCtxtPtr ctxt;
xmlParserInputBufferPtr buf;
xmlParserInputPtr input;
memset(data, 0, 5);
/*
* Set up a parsing context using the above data buffer as
* the current input source.
*/
ctxt = xmlNewParserCtxt();
if (ctxt == NULL) {
fprintf(stderr, "Failed to allocate parser context\n");
return;
}
buf = xmlParserInputBufferCreateStatic(data, sizeof(data),
XML_CHAR_ENCODING_NONE);
if (buf == NULL) {
fprintf(stderr, "Failed to allocate input buffer\n");
goto error;
}
input = xmlNewInputStream(ctxt);
if (input == NULL) {
xmlFreeParserInputBuffer(buf);
goto error;
}
input->filename = NULL;
input->buf = buf;
input->cur =
input->base = xmlBufContent(input->buf->buffer);
input->end = input->base + 4;
inputPush(ctxt, input);
printf("testing char range: 1");
fflush(stdout);
testCharRangeByte1(ctxt, data);
printf(" 2");
fflush(stdout);
testCharRangeByte2(ctxt, data);
printf(" 3");
fflush(stdout);
testCharRangeByte3(ctxt, data);
printf(" 4");
fflush(stdout);
testCharRangeByte4(ctxt, data);
printf(" done\n");
fflush(stdout);
error:
xmlFreeParserCtxt(ctxt);
}
int main(void) {
/*
* this initialize the library and check potential ABI mismatches
* between the version it was compiled for and the actual shared
* library used.
*/
LIBXML_TEST_VERSION
/*
* Catch errors separately
*/
xmlSetStructuredErrorFunc(NULL, errorHandler);
/*
* Run the tests
*/
testCharRanges();
testDocumentRanges();
/*
* Cleanup function for the XML library.
*/
xmlCleanupParser();
/*
* this is to debug memory for regression tests
*/
xmlMemoryDump();
return(0);
}
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