--- /dev/null
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* util/support/t_utf8.c - test UTF-8 boundary conditions */
+/*
+ * Copyright (C) 2015 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "k5-platform.h"
+#include "k5-utf8.h"
+
+/*
+ * Convenience macro to allow testing of old encodings.
+ *
+ * "Old" means ISO/IEC 10646 prior to 2011, when the highest valid code point
+ * was U+7FFFFFFF instead of U+10FFFF.
+ */
+#ifdef OLDENCODINGS
+#define L(x) (x)
+#else
+#define L(x) 0
+#endif
+
+/*
+ * len is 0 for invalid encoding prefixes (krb5int_utf8_charlen2() partially
+ * enforces the validity of the first two bytes, based on masking the second
+ * byte. It doesn't check whether bit 6 is 0, though, and doesn't catch the
+ * range between U+110000 and U+13FFFF).
+ *
+ * ucs is 0 for invalid encodings (including ones with valid prefixes according
+ * to krb5int_utf8_charlen2(); krb5int_utf8_to_ucs4() will still fail on them
+ * because it checks more things.) Code points above U+10FFFF are excluded by
+ * the actual test code and remain in the table for possibly testing the old
+ * implementation that didn't exclude them.
+ *
+ * Neither krb5int_ucs4_to_utf8() nor krb5int_utf8_to_ucs4() excludes the
+ * surrogate pair range.
+ */
+struct testcase {
+ const char *p;
+ krb5_ucs4 ucs;
+ int len;
+} testcases[] = {
+ { "\x7f", 0x0000007f, 1 }, /* Lowest 1-byte encoding */
+ { "\xc0\x80", 0x00000000, 0 }, /* Invalid 2-byte encoding */
+ { "\xc2\x80", 0x00000080, 2 }, /* Lowest valid 2-byte encoding */
+ { "\xdf\xbf", 0x000007ff, 2 }, /* Highest valid 2-byte encoding*/
+ { "\xdf\xff", 0x00000000, 2 }, /* Invalid 2-byte encoding*/
+ { "\xe0\x80\x80", 0x00000000, 0 }, /* Invalid 3-byte encoding */
+ { "\xe0\xa0\x80", 0x00000800, 3 }, /* Lowest valid 3-byte encoding */
+ { "\xef\xbf\xbf", 0x0000ffff, 3 }, /* Highest valid 3-byte encoding */
+ { "\xef\xff\xff", 0x00000000, 3 }, /* Invalid 3-byte encoding */
+ { "\xf0\x80\x80\x80", 0x00000000, 0 }, /* Invalid 4-byte encoding */
+ { "\xf0\x90\x80\x80", 0x00010000, 4 }, /* Lowest valid 4-byte encoding */
+ { "\xf4\x8f\xbf\xbf", 0x0010ffff, 4 }, /* Highest valid 4-byte encoding */
+ /* Next higher 4-byte encoding (old) */
+ { "\xf4\x90\x80\x80", 0x00110000, 4 },
+ /* Highest 4-byte encoding starting with 0xf4 (old) */
+ { "\xf4\xbf\xbf\xbf", 0x0013ffff, 4 },
+ /* Next higher 4-byte prefix byte (old) */
+ { "\xf5\x80\x80\x80", 0x00140000, L(4) },
+ /* Highest valid 4-byte encoding (old) */
+ { "\xf7\xbf\xbf\xbf", 0x001fffff, L(4) },
+ /* Invalid 4-byte encoding */
+ { "\xf7\xff\xff\xff", 0x00000000, L(4) },
+ /* Invalid 5-byte encoding */
+ { "\xf8\x80\x80\x80\x80", 0x00000000, 0 },
+ /* Lowest valid 5-byte encoding (old) */
+ { "\xf8\x88\x80\x80\x80", 0x00200000, L(5) },
+ /* Highest valid 5-byte encoding (old) */
+ { "\xfb\xbf\xbf\xbf\xbf", 0x03ffffff, L(5) },
+ /* Invalid 5-byte encoding */
+ { "\xfb\xff\xff\xff\xff", 0x00000000, L(5) },
+ /* Invalid 6-byte encoding */
+ { "\xfc\x80\x80\x80\x80\x80", 0x00000000, 0 },
+ /* Lowest valid 6-byte encoding (old) */
+ { "\xfc\x84\x80\x80\x80\x80", 0x04000000, L(6) },
+ /* Highest valid 6-byte encoding (old) */
+ { "\xfd\xbf\xbf\xbf\xbf\xbf", 0x7fffffff, L(6) },
+ /* Invalid 6-byte encoding */
+ { "\xfd\xff\xff\xff\xff\xff", 0x00000000, L(6) },
+};
+
+static void
+printhex(const char *p)
+{
+ for (; *p != '\0'; p++) {
+ printf("%02x ", (unsigned char)*p);
+ }
+}
+
+static void
+printtest(struct testcase *t)
+{
+ printhex(t->p);
+ printf("0x%08lx, %d\n", (unsigned long)t->ucs, t->len);
+}
+
+static int
+test_decode(struct testcase *t, int high4)
+{
+ int len, status = 0;
+ krb5_ucs4 u = 0;
+
+ len = krb5int_utf8_charlen2(t->p);
+ if (len != t->len) {
+ printf("expected len=%d, got len=%d\n", t->len, len);
+ status = 1;
+ }
+ if ((t->len == 0 || high4) && krb5int_utf8_to_ucs4(t->p, &u) != -1) {
+ printf("unexpected success in utf8_to_ucs4\n");
+ status = 1;
+ }
+ if (krb5int_utf8_to_ucs4(t->p, &u) != 0 && t->ucs != 0 && !high4) {
+ printf("unexpected failure in utf8_to_ucs4\n");
+ status = 1;
+ }
+ if (t->ucs != u && !high4) {
+ printf("expected 0x%08lx, got 0x%08lx\n", (unsigned long)t->ucs,
+ (unsigned long)u);
+ status = 1;
+ }
+ return status;
+}
+
+static int
+test_encode(struct testcase *t, int high4)
+{
+ size_t size;
+ char buf[7];
+
+ memset(buf, 0, sizeof(buf));
+ size = krb5int_ucs4_to_utf8(t->ucs, buf);
+ if (high4 && size != 0) {
+ printf("unexpected success beyond U+10FFFF\n");
+ return 1;
+ }
+ if (!high4 && size == 0) {
+ printf("unexpected zero size on encode\n");
+ return 1;
+ }
+ if (size != 0 && strcmp(t->p, buf) != 0) {
+ printf("expected ");
+ printhex(t->p);
+ printf("got ");
+ printhex(buf);
+ printf("\n");
+ return 1;
+ }
+ return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+ size_t ncases = sizeof(testcases) / sizeof(testcases[0]);
+ size_t i;
+ struct testcase *t;
+ int status = 0, verbose = 0;
+ /* Is this a "high" 4-byte encoding above U+10FFFF? */
+ int high4;
+
+ if (argc == 2 && strcmp(argv[1], "-v") == 0)
+ verbose = 1;
+ for (i = 0; i < ncases; i++) {
+ t = &testcases[i];
+ if (verbose)
+ printtest(t);
+#ifndef OLDENCODINGS
+ high4 = t->ucs > 0x10ffff;
+#else
+ high4 = 0;
+#endif
+ if (test_decode(t, high4) != 0)
+ status = 1;
+ if (t->ucs == 0)
+ continue;
+ if (test_encode(t, high4) != 0)
+ status = 1;
+ }
+ return status;
+}
projects / thirdparty / krb5.git / commitdiff
