1 files changed, 244 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/escape.c b/Utilities/cmcurl/lib/escape.c
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+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/* Escape and unescape URL encoding in strings. The functions return a new
+ * allocated string or NULL if an error occurred.  */
+
+#include "curl_setup.h"
+
+#include <curl/curl.h>
+
+#include "urldata.h"
+#include "warnless.h"
+#include "non-ascii.h"
+#include "escape.h"
+#include "strdup.h"
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/* Portable character check (remember EBCDIC). Do not use isalnum() because
+   its behavior is altered by the current locale.
+   See https://tools.ietf.org/html/rfc3986#section-2.3
+*/
+bool Curl_isunreserved(unsigned char in)
+{
+  switch(in) {
+    case '0': case '1': case '2': case '3': case '4':
+    case '5': case '6': case '7': case '8': case '9':
+    case 'a': case 'b': case 'c': case 'd': case 'e':
+    case 'f': case 'g': case 'h': case 'i': case 'j':
+    case 'k': case 'l': case 'm': case 'n': case 'o':
+    case 'p': case 'q': case 'r': case 's': case 't':
+    case 'u': case 'v': case 'w': case 'x': case 'y': case 'z':
+    case 'A': case 'B': case 'C': case 'D': case 'E':
+    case 'F': case 'G': case 'H': case 'I': case 'J':
+    case 'K': case 'L': case 'M': case 'N': case 'O':
+    case 'P': case 'Q': case 'R': case 'S': case 'T':
+    case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z':
+    case '-': case '.': case '_': case '~':
+      return TRUE;
+    default:
+      break;
+  }
+  return FALSE;
+}
+
+/* for ABI-compatibility with previous versions */
+char *curl_escape(const char *string, int inlength)
+{
+  return curl_easy_escape(NULL, string, inlength);
+}
+
+/* for ABI-compatibility with previous versions */
+char *curl_unescape(const char *string, int length)
+{
+  return curl_easy_unescape(NULL, string, length, NULL);
+}
+
+char *curl_easy_escape(struct Curl_easy *data, const char *string,
+                       int inlength)
+{
+  size_t alloc;
+  char *ns;
+  char *testing_ptr = NULL;
+  size_t newlen;
+  size_t strindex = 0;
+  size_t length;
+  CURLcode result;
+
+  if(inlength < 0)
+    return NULL;
+
+  alloc = (inlength?(size_t)inlength:strlen(string)) + 1;
+  newlen = alloc;
+
+  ns = malloc(alloc);
+  if(!ns)
+    return NULL;
+
+  length = alloc-1;
+  while(length--) {
+    unsigned char in = *string; /* we need to treat the characters unsigned */
+
+    if(Curl_isunreserved(in))
+      /* just copy this */
+      ns[strindex++] = in;
+    else {
+      /* encode it */
+      newlen += 2; /* the size grows with two, since this'll become a %XX */
+      if(newlen > alloc) {
+        alloc *= 2;
+        testing_ptr = Curl_saferealloc(ns, alloc);
+        if(!testing_ptr)
+          return NULL;
+        ns = testing_ptr;
+      }
+
+      result = Curl_convert_to_network(data, (char *)&in, 1);
+      if(result) {
+        /* Curl_convert_to_network calls failf if unsuccessful */
+        free(ns);
+        return NULL;
+      }
+
+      snprintf(&ns[strindex], 4, "%%%02X", in);
+
+      strindex += 3;
+    }
+    string++;
+  }
+  ns[strindex] = 0; /* terminate it */
+  return ns;
+}
+
+/*
+ * Curl_urldecode() URL decodes the given string.
+ *
+ * Optionally detects control characters (byte codes lower than 32) in the
+ * data and rejects such data.
+ *
+ * Returns a pointer to a malloced string in *ostring with length given in
+ * *olen. If length == 0, the length is assumed to be strlen(string).
+ *
+ * 'data' can be set to NULL but then this function can't convert network
+ * data to host for non-ascii.
+ */
+CURLcode Curl_urldecode(struct Curl_easy *data,
+                        const char *string, size_t length,
+                        char **ostring, size_t *olen,
+                        bool reject_ctrl)
+{
+  size_t alloc = (length?length:strlen(string)) + 1;
+  char *ns = malloc(alloc);
+  size_t strindex = 0;
+  unsigned long hex;
+  CURLcode result = CURLE_OK;
+
+  if(!ns)
+    return CURLE_OUT_OF_MEMORY;
+
+  while(--alloc > 0) {
+    unsigned char in = *string;
+    if(('%' == in) && (alloc > 2) &&
+       ISXDIGIT(string[1]) && ISXDIGIT(string[2])) {
+      /* this is two hexadecimal digits following a '%' */
+      char hexstr[3];
+      char *ptr;
+      hexstr[0] = string[1];
+      hexstr[1] = string[2];
+      hexstr[2] = 0;
+
+      hex = strtoul(hexstr, &ptr, 16);
+
+      in = curlx_ultouc(hex); /* this long is never bigger than 255 anyway */
+
+      if(data) {
+        result = Curl_convert_from_network(data, (char *)&in, 1);
+        if(result) {
+          /* Curl_convert_from_network calls failf if unsuccessful */
+          free(ns);
+          return result;
+        }
+      }
+
+      string += 2;
+      alloc -= 2;
+    }
+
+    if(reject_ctrl && (in < 0x20)) {
+      free(ns);
+      return CURLE_URL_MALFORMAT;
+    }
+
+    ns[strindex++] = in;
+    string++;
+  }
+  ns[strindex] = 0; /* terminate it */
+
+  if(olen)
+    /* store output size */
+    *olen = strindex;
+
+  /* store output string */
+  *ostring = ns;
+
+  return CURLE_OK;
+}
+
+/*
+ * Unescapes the given URL escaped string of given length. Returns a
+ * pointer to a malloced string with length given in *olen.
+ * If length == 0, the length is assumed to be strlen(string).
+ * If olen == NULL, no output length is stored.
+ */
+char *curl_easy_unescape(struct Curl_easy *data, const char *string,
+                         int length, int *olen)
+{
+  char *str = NULL;
+  if(length >= 0) {
+    size_t inputlen = length;
+    size_t outputlen;
+    CURLcode res = Curl_urldecode(data, string, inputlen, &str, &outputlen,
+                                  FALSE);
+    if(res)
+      return NULL;
+
+    if(olen) {
+      if(outputlen <= (size_t) INT_MAX)
+        *olen = curlx_uztosi(outputlen);
+      else
+        /* too large to return in an int, fail! */
+        Curl_safefree(str);
+    }
+  }
+  return str;
+}
+
+/* For operating systems/environments that use different malloc/free
+   systems for the app and for this library, we provide a free that uses
+   the library's memory system */
+void curl_free(void *p)
+{
+  free(p);
+}