302 lines
14 KiB
C
302 lines
14 KiB
C
#include <CUnit/CUnit.h>
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#include <CUnit/Basic.h>
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#include "mosquitto.h"
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/* Test data taken from
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* http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt but modified for
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* updated standard (no 5, 6 byte lengths) */
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static void utf8_helper_len(const char *text, int len, int expected)
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{
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int result;
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result = mosquitto_validate_utf8(text, len);
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CU_ASSERT_EQUAL(result, expected);
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}
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static void utf8_helper(const char *text, int expected)
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{
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utf8_helper_len(text, strlen(text), expected);
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}
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static void TEST_utf8_empty(void)
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{
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utf8_helper_len(NULL, 0, MOSQ_ERR_INVAL);
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}
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static void TEST_utf8_valid(void)
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{
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/* 1 Some correct UTF-8 text */
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utf8_helper("", MOSQ_ERR_SUCCESS);
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utf8_helper("You should see the Greek word 'kosme': \"κόσμε\"", MOSQ_ERR_SUCCESS);
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}
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static void TEST_utf8_boundary_conditions(void)
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{
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/* 2 Boundary condition test cases */
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/* 2.1 First possible sequence of a certain length */
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utf8_helper_len("2.1.1 1 byte (U-00000000): \"\0\"", 39, MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("2.1.2 2 bytes (U-00000080): \"\"", MOSQ_ERR_SUCCESS);
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utf8_helper("2.1.3 3 bytes (U-00000800): \"ࠀ\"", MOSQ_ERR_SUCCESS);
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utf8_helper("2.1.4 4 bytes (U-00010000): \"𐀀\"", MOSQ_ERR_SUCCESS);
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/* 2.2 Last possible sequence of a certain length */
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utf8_helper("2.2.1 1 byte (U-0000007F): \"\"", MOSQ_ERR_SUCCESS);
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utf8_helper("2.2.2 2 bytes (U-000007FF): \"߿\"", MOSQ_ERR_SUCCESS);
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/* Non character */
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utf8_helper("2.2.3 3 bytes (U-0000FFFF): \"\"", MOSQ_ERR_MALFORMED_UTF8);
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/* Non character */
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utf8_helper("2.2.4 4 bytes (U-0010FFFF): \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 2.3 Other boundary conditions */
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utf8_helper("2.3.1 U-0000D7FF = ed 9f bf = \"\"", MOSQ_ERR_SUCCESS);
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utf8_helper("2.3.2 U-0000E000 = ee 80 80 = \"\"", MOSQ_ERR_SUCCESS);
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utf8_helper("2.3.3 U-0000FFFD = ef bf bd = \"<EFBFBD>\"", MOSQ_ERR_SUCCESS);
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/* Non character */
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utf8_helper("2.3.4 U-0010FFFF = f4 8f bf bf = \"\"", MOSQ_ERR_MALFORMED_UTF8);
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/* This used to be valid in pre-2003 utf-8 */
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utf8_helper("2.3.5 U-00110000 = f4 90 80 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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}
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static void TEST_utf8_malformed_sequences(void)
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{
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/* 3 Malformed sequences */
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/* 3.1 Unexpected continuation bytes */
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utf8_helper("3.1.1 First continuation byte 0x80: \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.2 Last continuation byte 0xbf: \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.3 2 continuation bytes: \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.4 3 continuation bytes: \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.5 4 continuation bytes: \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.6 5 continuation bytes: \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.7 6 continuation bytes: \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.1.8 7 continuation bytes: \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.1.9 Sequence of all 64 possible continuation bytes (0x80-0xbf): */
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utf8_helper("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.2 Lonely start characters */
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/* 3.2.1 All 32 first bytes of 2-byte sequences (0xc0-0xdf),
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each followed by a space character: */
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utf8_helper("\"<EFBFBD> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> \"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.2.2 All 16 first bytes of 3-byte sequences (0xe0-0xef),
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each followed by a space character: */
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utf8_helper("\"<EFBFBD> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> \"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.2.3 All 8 first bytes of 4-byte sequences (0xf0-0xf7),
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each followed by a space character: */
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utf8_helper("\"<EFBFBD> <20> <20> <20> <20> <20> <20> <20> \"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.2.4 All 4 first bytes of 5-byte sequences (0xf8-0xfb),
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each followed by a space character: */
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utf8_helper("\"<EFBFBD> <20> <20> <20> \"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.2.5 All 2 first bytes of 6-byte sequences (0xfc-0xfd),
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each followed by a space character: */
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utf8_helper("\"<EFBFBD> <20> \"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.3 Sequences with last continuation byte missing
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All bytes of an incomplete sequence should be signalled as a single
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malformed sequence, i.e., you should see only a single replacement
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character in each of the next 10 tests. (Characters as in section 2) */
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utf8_helper("3.3.1 2-byte sequence with last byte missing (U+0000): \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.2 3-byte sequence with last byte missing (U+0000): \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.3 4-byte sequence with last byte missing (U+0000): \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.4 5-byte sequence with last byte missing (U+0000): \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.5 6-byte sequence with last byte missing (U+0000): \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.6 2-byte sequence with last byte missing (U-000007FF): \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.7 3-byte sequence with last byte missing (U-0000FFFF): \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.8 4-byte sequence with last byte missing (U-001FFFFF): \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.9 5-byte sequence with last byte missing (U-03FFFFFF): \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.3.10 6-byte sequence with last byte missing (U-7FFFFFFF): \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.4 Concatenation of incomplete sequences
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All the 10 sequences of 3.3 concatenated, you should see 10 malformed
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sequences being signalled:*/
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utf8_helper("\"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 3.5 Impossible bytes
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The following two bytes cannot appear in a correct UTF-8 string */
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utf8_helper("3.5.1 fe = \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.5.2 ff = \"<EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("3.5.3 fe fe ff ff = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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}
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static void TEST_utf8_overlong_encoding(void)
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{
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/* 4 Overlong sequences
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The following sequences are not malformed according to the letter of
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the Unicode 2.0 standard. However, they are longer then necessary and
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a correct UTF-8 encoder is not allowed to produce them. A "safe UTF-8
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decoder" should reject them just like malformed sequences for two
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reasons: (1) It helps to debug applications if overlong sequences are
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not treated as valid representations of characters, because this helps
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to spot problems more quickly. (2) Overlong sequences provide
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alternative representations of characters, that could maliciously be
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used to bypass filters that check only for ASCII characters. For
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instance, a 2-byte encoded line feed (LF) would not be caught by a
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line counter that counts only 0x0a bytes, but it would still be
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processed as a line feed by an unsafe UTF-8 decoder later in the
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pipeline. From a security point of view, ASCII compatibility of UTF-8
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sequences means also, that ASCII characters are *only* allowed to be
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represented by ASCII bytes in the range 0x00-0x7f. To ensure this
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aspect of ASCII compatibility, use only "safe UTF-8 decoders" that
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reject overlong UTF-8 sequences for which a shorter encoding exists. */
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/* 4.1 Examples of an overlong ASCII character
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With a safe UTF-8 decoder, all of the following five overlong
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representations of the ASCII character slash ("/") should be rejected
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like a malformed UTF-8 sequence, for instance by substituting it with
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a replacement character. If you see a slash below, you do not have a
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safe UTF-8 decoder! */
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utf8_helper("4.1.1 U+002F = c0 af = \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.1.2 U+002F = e0 80 af = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.1.3 U+002F = f0 80 80 af = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.1.4 U+002F = f8 80 80 80 af = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.1.5 U+002F = fc 80 80 80 80 af = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 4.2 Maximum overlong sequences
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Below you see the highest Unicode value that is still resulting in an
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overlong sequence if represented with the given number of bytes. This
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is a boundary test for safe UTF-8 decoders. All five characters should
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be rejected like malformed UTF-8 sequences. */
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utf8_helper("4.2.1 U-0000007F = c1 bf = \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.2.2 U-000007FF = e0 9f bf = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.2.3 U-0000FFFF = f0 8f bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.2.4 U-001FFFFF = f8 87 bf bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.2.5 U-03FFFFFF = fc 83 bf bf bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 4.3 Overlong representation of the NUL character
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The following five sequences should also be rejected like malformed
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UTF-8 sequences and should not be treated like the ASCII NUL
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character. */
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utf8_helper("4.3.1 U+0000 = c0 80 = \"<EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.3.2 U+0000 = e0 80 80 = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.3.3 U+0000 = f0 80 80 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.3.4 U+0000 = f8 80 80 80 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("4.3.5 U+0000 = fc 80 80 80 80 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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}
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static void TEST_utf8_illegal_code_positions(void)
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{
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/* 5 Illegal code positions
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The following UTF-8 sequences should be rejected like malformed
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sequences, because they never represent valid ISO 10646 characters and
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a UTF-8 decoder that accepts them might introduce security problems
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comparable to overlong UTF-8 sequences. */
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/* 5.1 Single UTF-16 surrogates */
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utf8_helper("5.1.1 U+D800 = ed a0 80 = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.2 U+DB7F = ed ad bf = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.3 U+DB80 = ed ae 80 = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.4 U+DBFF = ed af bf = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.5 U+DC00 = ed b0 80 = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.6 U+DF80 = ed be 80 = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.1.7 U+DFFF = ed bf bf = \"<EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 5.2 Paired UTF-16 surrogates */
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/* FIXME - these need splitting up into separate tests. */
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utf8_helper("5.2.1 U+D800 U+DC00 = ed a0 80 ed b0 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.2 U+D800 U+DFFF = ed a0 80 ed bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.3 U+DB7F U+DC00 = ed ad bf ed b0 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.4 U+DB7F U+DFFF = ed ad bf ed bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.5 U+DB80 U+DC00 = ed ae 80 ed b0 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.6 U+DB80 U+DFFF = ed ae 80 ed bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.7 U+DBFF U+DC00 = ed af bf ed b0 80 = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.2.8 U+DBFF U+DFFF = ed af bf ed bf bf = \"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 5.3 Noncharacter code positions
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The following "noncharacters" are "reserved for internal use" by
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applications, and according to older versions of the Unicode Standard
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"should never be interchanged". Unicode Corrigendum #9 dropped the
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latter restriction. Nevertheless, their presence in incoming UTF-8 data
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can remain a potential security risk, depending on what use is made of
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these codes subsequently. Examples of such internal use:
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- Some file APIs with 16-bit characters may use the integer value -1
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= U+FFFF to signal an end-of-file (EOF) or error condition.
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- In some UTF-16 receivers, code point U+FFFE might trigger a
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byte-swap operation (to convert between UTF-16LE and UTF-16BE).
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With such internal use of noncharacters, it may be desirable and safer
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to block those code points in UTF-8 decoders, as they should never
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occur legitimately in incoming UTF-8 data, and could trigger unsafe
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behaviour in subsequent processing.
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Particularly problematic noncharacters in 16-bit applications: */
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utf8_helper("5.3.1 U+FFFE = ef bf be = \"\"", MOSQ_ERR_MALFORMED_UTF8);
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utf8_helper("5.3.2 U+FFFF = ef bf bf = \"\"", MOSQ_ERR_MALFORMED_UTF8);
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/* Other noncharacters: */
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/* FIXME - these need splitting up into separate tests. */
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utf8_helper("5.3.3 U+FDD0 .. U+FDEF = \"\"", MOSQ_ERR_MALFORMED_UTF8);
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/* 5.3.4 U+nFFFE U+nFFFF (for n = 1..10) */
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utf8_helper("\"\"", MOSQ_ERR_MALFORMED_UTF8);
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}
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/* ========================================================================
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* TEST SUITE SETUP
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* ======================================================================== */
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int init_utf8_tests(void)
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{
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CU_pSuite test_suite = NULL;
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test_suite = CU_add_suite("UTF-8", NULL, NULL);
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if(!test_suite){
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printf("Error adding CUnit test suite.\n");
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return 1;
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}
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if(0
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|| !CU_add_test(test_suite, "UTF-8 empty", TEST_utf8_empty)
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|| !CU_add_test(test_suite, "UTF-8 valid", TEST_utf8_valid)
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|| !CU_add_test(test_suite, "UTF-8 boundary conditions", TEST_utf8_boundary_conditions)
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|| !CU_add_test(test_suite, "UTF-8 malformed sequences", TEST_utf8_malformed_sequences)
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|| !CU_add_test(test_suite, "UTF-8 overlong encoding", TEST_utf8_overlong_encoding)
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|| !CU_add_test(test_suite, "UTF-8 illegal code positions", TEST_utf8_illegal_code_positions)
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){
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printf("Error adding UTF-8 CUnit tests.\n");
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return 1;
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}
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return 0;
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}
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