Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/src/testchar.c

Index: third_party/libxml/src/testchar.c
diff --git a/third_party/libxml/src/testchar.c b/third_party/libxml/src/testchar.c
new file mode 100644
index 0000000000000000000000000000000000000000..0d087927a7e52423142f593f9b0e01f5cdf68a90
--- /dev/null
+++ b/third_party/libxml/src/testchar.c
@@ -0,0 +1,617 @@
+/**
+ * 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 remaning 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 remaning 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);
+}