ssl: remove obsolete amqp_hostcheck

This is dead code, obsoleted by #673 (setting minimum OpenSSL v1.1.1).

Signed-off-by: GitHub <noreply@github.com>

3 files changed, 0 insertions, 245 deletions

diff --git a/librabbitmq/CMakeLists.txt b/librabbitmq/CMakeLists.txt
index daecc02..bf44ed7 100644
--- a/librabbitmq/CMakeLists.txt
+++ b/librabbitmq/CMakeLists.txt
@@ -70,8 +70,6 @@ if (ENABLE_SSL_SUPPORT)
       ${AMQP_SSL_SOCKET_SHIM_PATH}
       ${AMQP_SSL_SOCKET_H_PATH}
       amqp_openssl.c
-      amqp_hostcheck.c
-      amqp_hostcheck.h
       amqp_openssl_bio.c
       amqp_openssl_bio.h
   )
diff --git a/librabbitmq/amqp_hostcheck.c b/librabbitmq/amqp_hostcheck.c
deleted file mode 100644
index 5a4f733..0000000
--- a/librabbitmq/amqp_hostcheck.c
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- * Copyright 1996-2014 Daniel Stenberg <daniel@haxx.se>.
- * Copyright 2014 Michael Steinert
- *
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the name of a copyright holder shall
- * not be used in advertising or otherwise to promote the sale, use or other
- * dealings in this Software without prior written authorization of the
- * copyright holder.
- */
-
-#include "amqp_hostcheck.h"
-
-#include <string.h>
-
-/* Portable, consistent toupper (remember EBCDIC). Do not use toupper()
- * because its behavior is altered by the current locale.
- */
-
-static char amqp_raw_toupper(char in) {
-  switch (in) {
-    case 'a':
-      return 'A';
-    case 'b':
-      return 'B';
-    case 'c':
-      return 'C';
-    case 'd':
-      return 'D';
-    case 'e':
-      return 'E';
-    case 'f':
-      return 'F';
-    case 'g':
-      return 'G';
-    case 'h':
-      return 'H';
-    case 'i':
-      return 'I';
-    case 'j':
-      return 'J';
-    case 'k':
-      return 'K';
-    case 'l':
-      return 'L';
-    case 'm':
-      return 'M';
-    case 'n':
-      return 'N';
-    case 'o':
-      return 'O';
-    case 'p':
-      return 'P';
-    case 'q':
-      return 'Q';
-    case 'r':
-      return 'R';
-    case 's':
-      return 'S';
-    case 't':
-      return 'T';
-    case 'u':
-      return 'U';
-    case 'v':
-      return 'V';
-    case 'w':
-      return 'W';
-    case 'x':
-      return 'X';
-    case 'y':
-      return 'Y';
-    case 'z':
-      return 'Z';
-  }
-  return in;
-}
-
-/*
- * amqp_raw_equal() is for doing "raw" case insensitive strings. This is meant
- * to be locale independent and only compare strings we know are safe for
- * this. See http://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for
- * some further explanation to why this function is necessary.
- *
- * The function is capable of comparing a-z case insensitively even for
- * non-ascii.
- */
-
-static int amqp_raw_equal(const char *first, const char *second) {
-  while (*first && *second) {
-    if (amqp_raw_toupper(*first) != amqp_raw_toupper(*second)) {
-      /* get out of the loop as soon as they don't match */
-      break;
-    }
-    first++;
-    second++;
-  }
-  /* we do the comparison here (possibly again), just to make sure that if
-   * the loop above is skipped because one of the strings reached zero, we
-   * must not return this as a successful match
-   */
-  return (amqp_raw_toupper(*first) == amqp_raw_toupper(*second));
-}
-
-static int amqp_raw_nequal(const char *first, const char *second, size_t max) {
-  while (*first && *second && max) {
-    if (amqp_raw_toupper(*first) != amqp_raw_toupper(*second)) {
-      break;
-    }
-    max--;
-    first++;
-    second++;
-  }
-  if (0 == max) {
-    return 1; /* they are equal this far */
-  }
-  return amqp_raw_toupper(*first) == amqp_raw_toupper(*second);
-}
-
-/*
- * Match a hostname against a wildcard pattern.
- * E.g.
- *  "foo.host.com" matches "*.host.com".
- *
- * We use the matching rule described in RFC6125, section 6.4.3.
- * http://tools.ietf.org/html/rfc6125#section-6.4.3
- */
-
-static amqp_hostcheck_result amqp_hostmatch(const char *hostname,
-                                            const char *pattern) {
-  const char *pattern_label_end, *pattern_wildcard, *hostname_label_end;
-  int wildcard_enabled;
-  size_t prefixlen, suffixlen;
-  pattern_wildcard = strchr(pattern, '*');
-  if (pattern_wildcard == NULL) {
-    return amqp_raw_equal(pattern, hostname) ? AMQP_HCR_MATCH
-                                             : AMQP_HCR_NO_MATCH;
-  }
-  /* We require at least 2 dots in pattern to avoid too wide wildcard match. */
-  wildcard_enabled = 1;
-  pattern_label_end = strchr(pattern, '.');
-  if (pattern_label_end == NULL || strchr(pattern_label_end + 1, '.') == NULL ||
-      pattern_wildcard > pattern_label_end ||
-      amqp_raw_nequal(pattern, "xn--", 4)) {
-    wildcard_enabled = 0;
-  }
-  if (!wildcard_enabled) {
-    return amqp_raw_equal(pattern, hostname) ? AMQP_HCR_MATCH
-                                             : AMQP_HCR_NO_MATCH;
-  }
-  hostname_label_end = strchr(hostname, '.');
-  if (hostname_label_end == NULL ||
-      !amqp_raw_equal(pattern_label_end, hostname_label_end)) {
-    return AMQP_HCR_NO_MATCH;
-  }
-  /* The wildcard must match at least one character, so the left-most
-   * label of the hostname is at least as large as the left-most label
-   * of the pattern.
-   */
-  if (hostname_label_end - hostname < pattern_label_end - pattern) {
-    return AMQP_HCR_NO_MATCH;
-  }
-  prefixlen = pattern_wildcard - pattern;
-  suffixlen = pattern_label_end - (pattern_wildcard + 1);
-  return amqp_raw_nequal(pattern, hostname, prefixlen) &&
-                 amqp_raw_nequal(pattern_wildcard + 1,
-                                 hostname_label_end - suffixlen, suffixlen)
-             ? AMQP_HCR_MATCH
-             : AMQP_HCR_NO_MATCH;
-}
-
-amqp_hostcheck_result amqp_hostcheck(const char *match_pattern,
-                                     const char *hostname) {
-  /* sanity check */
-  if (!match_pattern || !*match_pattern || !hostname || !*hostname) {
-    return AMQP_HCR_NO_MATCH;
-  }
-  /* trivial case */
-  if (amqp_raw_equal(hostname, match_pattern)) {
-    return AMQP_HCR_MATCH;
-  }
-  return amqp_hostmatch(hostname, match_pattern);
-}
diff --git a/librabbitmq/amqp_hostcheck.h b/librabbitmq/amqp_hostcheck.h
deleted file mode 100644
index 7ab5c26..0000000
--- a/librabbitmq/amqp_hostcheck.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#ifndef librabbitmq_amqp_hostcheck_h
-#define librabbitmq_amqp_hostcheck_h
-
-/*
- * Copyright 1996-2014 Daniel Stenberg <daniel@haxx.se>.
- * Copyright 2014 Michael Steinert
- *
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the name of a copyright holder shall
- * not be used in advertising or otherwise to promote the sale, use or other
- * dealings in this Software without prior written authorization of the
- * copyright holder.
- */
-
-typedef enum {
-  AMQP_HCR_NO_MATCH = 0,
-  AMQP_HCR_MATCH = 1
-} amqp_hostcheck_result;
-
-/**
- * Determine whether hostname matches match_pattern.
- *
- * match_pattern may include wildcards.
- *
- * Match is performed based on the rules set forth in RFC6125 section 6.4.3.
- * http://tools.ietf.org/html/rfc6125#section-6.4.3
- *
- * \param match_pattern RFC6125 compliant pattern
- * \param hostname to match against
- * \returns AMQP_HCR_MATCH if its a match, AMQP_HCR_NO_MATCH otherwise.
- */
-amqp_hostcheck_result amqp_hostcheck(const char *match_pattern,
-                                     const char *hostname);
-
-#endif