1 files changed, 544 insertions, 0 deletions

diff --git a/libetpan/src/low-level/mime/mailmime_decode.c b/libetpan/src/low-level/mime/mailmime_decode.c
new file mode 100644
index 0000000..715ddad
--- a/dev/null
+++ b/libetpan/src/low-level/mime/mailmime_decode.c
@@ -0,0 +1,544 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2005 - DINH Viet Hoa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of the libEtPan! project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
+ */
+
+/*
+ * $Id$
+ */
+
+/*
+  RFC 2047 : MIME (Multipurpose Internet Mail Extensions) Part Three:
+             Message Header Extensions for Non-ASCII Text
+*/
+
+#include "mailmime_decode.h"
+
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "mailmime_content.h"
+
+#include "charconv.h"
+#include "mmapstring.h"
+#include "mailimf.h"
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+static int mailmime_charset_parse(const char * message, size_t length,
+                                  size_t * index, char ** charset);
+
+enum {
+  MAILMIME_ENCODING_B,
+  MAILMIME_ENCODING_Q
+};
+
+static int mailmime_encoding_parse(const char * message, size_t length,
+                                   size_t * index, int * result);
+
+static int mailmime_etoken_parse(const char * message, size_t length,
+                                 size_t * index, char ** result);
+
+static int
+mailmime_non_encoded_word_parse(const char * message, size_t length,
+                                size_t * index,
+                                char ** result);
+
+static int
+mailmime_encoded_word_parse(const char * message, size_t length,
+                            size_t * index,
+                            struct mailmime_encoded_word ** result);
+     
+
+enum {
+  TYPE_ERROR,
+  TYPE_WORD,
+  TYPE_ENCODED_WORD,
+};
+
+int mailmime_encoded_phrase_parse(const char * default_fromcode,
+    const char * message, size_t length,
+    size_t * index, const char * tocode,
+    char ** result)
+{
+  MMAPString * gphrase;
+  struct mailmime_encoded_word * word;
+  int first;
+  size_t cur_token;
+  int r;
+  int res;
+  char * str;
+  char * wordutf8;
+  int type;
+
+  cur_token = * index;
+
+  gphrase = mmap_string_new("");
+  if (gphrase == NULL) {
+    res = MAILIMF_ERROR_MEMORY;
+    goto err;
+  }
+
+  first = TRUE;
+
+  type = TYPE_ERROR; /* XXX - removes a gcc warning */
+
+  while (1) {
+
+    r = mailmime_encoded_word_parse(message, length, &cur_token, &word);
+    if (r == MAILIMF_NO_ERROR) {
+      if (!first) {
+        if (type != TYPE_ENCODED_WORD) {
+          if (mmap_string_append_c(gphrase, ' ') == NULL) {
+            mailmime_encoded_word_free(word);
+            res = MAILIMF_ERROR_MEMORY;
+            goto free;
+          }
+        }
+      }
+      type = TYPE_ENCODED_WORD;
+      wordutf8 = NULL;
+      r = charconv(tocode, word->wd_charset, word->wd_text,
+                   strlen(word->wd_text), &wordutf8);
+      switch (r) {
+      case MAIL_CHARCONV_ERROR_MEMORY:
+        mailmime_encoded_word_free(word);
+        res = MAILIMF_ERROR_MEMORY;
+        goto free;
+
+      case MAIL_CHARCONV_ERROR_UNKNOWN_CHARSET:
+      case MAIL_CHARCONV_ERROR_CONV:
+        mailmime_encoded_word_free(word);
+        res = MAILIMF_ERROR_PARSE;
+        goto free;
+      }
+      
+      if (wordutf8 != NULL) {
+        if (mmap_string_append(gphrase, wordutf8) == NULL) {
+          mailmime_encoded_word_free(word);
+          free(wordutf8);
+          res = MAILIMF_ERROR_MEMORY;
+          goto free;
+        }
+        free(wordutf8);
+      }
+      mailmime_encoded_word_free(word);
+      first = FALSE;
+    }
+    else if (r == MAILIMF_ERROR_PARSE) {
+      /* do nothing */
+    }
+    else {
+      res = r;
+      goto free;
+    }
+
+    if (r == MAILIMF_ERROR_PARSE) {
+      char * raw_word;
+
+      r = mailmime_non_encoded_word_parse(message, length,
+                                          &cur_token, &raw_word);
+      if (r == MAILIMF_NO_ERROR) {
+        if (!first) {
+          if (mmap_string_append_c(gphrase, ' ') == NULL) {
+            free(raw_word);
+            res = MAILIMF_ERROR_MEMORY;
+            goto free;
+          }
+        }
+        type = TYPE_WORD;
+        
+        wordutf8 = NULL;
+        r = charconv(tocode, default_fromcode, raw_word,
+            strlen(raw_word), &wordutf8);
+        
+        switch (r) {
+        case MAIL_CHARCONV_ERROR_MEMORY:
+          free(raw_word);
+          res = MAILIMF_ERROR_MEMORY;
+          goto free;
+          
+        case MAIL_CHARCONV_ERROR_UNKNOWN_CHARSET:
+        case MAIL_CHARCONV_ERROR_CONV:
+          free(raw_word);
+          res = MAILIMF_ERROR_PARSE;
+          goto free;
+        }
+        
+        if (mmap_string_append(gphrase, wordutf8) == NULL) {
+          free(wordutf8);
+          free(raw_word);
+          res = MAILIMF_ERROR_MEMORY;
+          goto free;
+        }
+        
+        free(wordutf8);
+        free(raw_word);
+        first = FALSE;
+      }
+      else if (r == MAILIMF_ERROR_PARSE) {
+        break;
+      }
+      else {
+        res = r;
+        goto free;
+      }
+    }
+  }
+
+  if (first) {
+    res = MAILIMF_ERROR_PARSE;
+    goto free;
+  }
+
+  str = strdup(gphrase->str);
+  if (str == NULL) {
+    res = MAILIMF_ERROR_MEMORY;
+    goto free;
+  }
+  mmap_string_free(gphrase);
+
+  * result = str;
+  * index = cur_token;
+
+  return MAILIMF_NO_ERROR;
+
+ free:
+  mmap_string_free(gphrase);
+ err:
+  return res;
+}
+
+static int
+mailmime_non_encoded_word_parse(const char * message, size_t length,
+                                size_t * index,
+                                char ** result)
+{
+  int end;
+  size_t cur_token;
+  int res;
+  char * text;
+  int r;
+  size_t begin;
+
+  cur_token = * index;
+
+  r = mailimf_fws_parse(message, length, &cur_token);
+  if ((r != MAILIMF_NO_ERROR) && (r != MAILIMF_ERROR_PARSE)) {
+    res = r;
+    goto err;
+  }
+
+  begin = cur_token;
+
+  end = FALSE;
+  while (1) {
+    if (cur_token >= length)
+      break;
+
+    switch (message[cur_token]) {
+      case ' ':
+      case '\t':
+      case '\r':
+      case '\n':
+        end = TRUE;
+        break;
+    }
+
+    if (end)
+      break;
+
+    cur_token ++;
+  }
+
+  if (cur_token - begin == 0) {
+    res = MAILIMF_ERROR_PARSE;
+    goto err;
+  }
+
+  text = malloc(cur_token - begin + 1);
+  if (text == NULL) {
+    res = MAILIMF_ERROR_MEMORY;
+    goto err;
+  }
+
+  memcpy(text, message + begin, cur_token - begin);
+  text[cur_token - begin] = '\0';
+
+  * index = cur_token;
+  * result = text;
+
+  return MAILIMF_NO_ERROR;
+
+ err:
+  return res;
+}
+
+static int mailmime_encoded_word_parse(const char * message, size_t length,
+                                       size_t * index,
+                                       struct mailmime_encoded_word ** result)
+{
+  size_t cur_token;
+  char * charset;
+  int encoding;
+  char * text;
+  size_t end_encoding;
+  char * decoded;
+  size_t decoded_len;
+  struct mailmime_encoded_word * ew;
+  int r;
+  int res;
+  int opening_quote;
+  int end;
+
+  cur_token = * index;
+
+  r = mailimf_fws_parse(message, length, &cur_token);
+  if ((r != MAILIMF_NO_ERROR) && (r != MAILIMF_ERROR_PARSE)) {
+    res = r;
+    goto err;
+  }
+
+  opening_quote = FALSE;
+  r = mailimf_char_parse(message, length, &cur_token, '\"');
+  if (r == MAILIMF_NO_ERROR) {
+    opening_quote = TRUE;
+  }
+  else if (r == MAILIMF_ERROR_PARSE) {
+    /* do nothing */  
+  }
+  else {
+    res = r;
+    goto err;
+  }
+
+  r = mailimf_token_case_insensitive_parse(message, length, &cur_token, "=?");
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto err;
+  }
+
+  r = mailmime_charset_parse(message, length, &cur_token, &charset);
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto err;
+  }
+
+  r = mailimf_char_parse(message, length, &cur_token, '?');
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto free_charset;
+  }
+
+  r = mailmime_encoding_parse(message, length, &cur_token, &encoding);
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto free_charset;
+  }
+
+  r = mailimf_char_parse(message, length, &cur_token, '?');
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto free_charset;
+  }
+
+  end = FALSE;
+  end_encoding = cur_token;
+  while (1) {
+    if (end_encoding >= length)
+      break;
+
+    switch (message[end_encoding]) {
+      case '?':
+#if 0
+      case ' ':
+#endif
+        end = TRUE;
+        break;
+    }
+
+    if (end)
+      break;
+
+    end_encoding ++;
+  }
+
+  decoded_len = 0;
+  decoded = NULL;
+  switch (encoding) {
+  case MAILMIME_ENCODING_B:
+    r = mailmime_base64_body_parse(message, end_encoding,
+                                   &cur_token, &decoded,
+                                   &decoded_len);
+      
+    if (r != MAILIMF_NO_ERROR) {
+      res = r;
+      goto free_charset;
+    }
+    break;
+  case MAILMIME_ENCODING_Q:
+    r = mailmime_quoted_printable_body_parse(message, end_encoding,
+                                             &cur_token, &decoded,
+                                             &decoded_len, TRUE);
+
+    if (r != MAILIMF_NO_ERROR) {
+      res = r;
+      goto free_charset;
+    }
+
+    break;
+  }
+
+  text = malloc(decoded_len + 1);
+  if (text == NULL) {
+    res = MAILIMF_ERROR_MEMORY;
+    goto free_charset;
+  }
+
+  if (decoded_len > 0)
+    memcpy(text, decoded, decoded_len);
+  text[decoded_len] = '\0';
+
+  mailmime_decoded_part_free(decoded);
+
+  r = mailimf_token_case_insensitive_parse(message, length, &cur_token, "?=");
+  if (r != MAILIMF_NO_ERROR) {
+    res = r;
+    goto free_encoded_text;
+  }
+
+  if (opening_quote) {
+    r = mailimf_char_parse(message, length, &cur_token, '\"');
+    if ((r != MAILIMF_NO_ERROR) && (r != MAILIMF_ERROR_PARSE)) {
+      res = r;
+      goto free_encoded_text;
+    }
+  }
+
+  ew = mailmime_encoded_word_new(charset, text);
+  if (ew == NULL) {
+    res = MAILIMF_ERROR_MEMORY;
+    goto free_encoded_text;
+  }
+
+  * result = ew;
+  * index = cur_token;
+  
+  return MAILIMF_NO_ERROR;
+
+ free_encoded_text:
+  mailmime_encoded_text_free(text);
+ free_charset:
+  mailmime_charset_free(charset);
+ err:
+  return res;
+}
+
+static int mailmime_charset_parse(const char * message, size_t length,
+                                  size_t * index, char ** charset)
+{
+  return mailmime_etoken_parse(message, length, index, charset);
+}
+
+static int mailmime_encoding_parse(const char * message, size_t length,
+                                   size_t * index, int * result)
+{
+  size_t cur_token;
+  int encoding;
+
+  cur_token = * index;
+
+  if (cur_token >= length)
+    return MAILIMF_ERROR_PARSE;
+
+  switch ((char) toupper((unsigned char) message[cur_token])) {
+  case 'Q':
+    encoding = MAILMIME_ENCODING_Q;
+    break;
+  case 'B':
+    encoding = MAILMIME_ENCODING_B;
+    break;
+  default:
+    return MAILIMF_ERROR_INVAL;
+  }
+
+  cur_token ++;
+
+  * result = encoding;
+  * index = cur_token;
+
+  return MAILIMF_NO_ERROR;
+}
+
+int is_etoken_char(char ch)
+{
+  unsigned char uch = ch;
+
+  if (uch < 31)
+    return FALSE;
+
+  switch (uch) {
+  case ' ':
+  case '(':
+  case ')':
+  case '<':
+  case '>':
+  case '@':
+  case ',':
+  case ';':
+  case ':':
+  case '"':
+  case '/':
+  case '[':
+  case ']':
+  case '?':
+  case '.':
+  case '=':
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+static int mailmime_etoken_parse(const char * message, size_t length,
+                                 size_t * index, char ** result)
+{
+  return mailimf_custom_string_parse(message, length,
+                                     index, result,
+                                     is_etoken_char);
+}