* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2017 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for parsing addresses */
address_item *deliver_make_addr(uschar *address, BOOL copy)
{
-address_item *addr = store_get(sizeof(address_item));
+address_item *addr = store_get(sizeof(address_item), FALSE);
addr->next = NULL;
addr->parent = NULL;
addr->address = address;
while (*s)
{
int c, level;
- while (isspace(*s)) s++;
- if (*s != '(') break;
+
+ if (Uskip_whitespace(&s) != '(') break;
level = 1;
- while((c = *(++s)) != 0)
+ while((c = *(++s)))
{
if (c == '(') level++;
else if (c == ')') { if (--level <= 0) { s++; break; } }
if (*s == '\"')
{
*t++ = '\"';
- while ((c = *(++s)) != 0 && c != '\"')
+ while ((c = *++s) && c != '\"')
{
*t++ = c;
- if (c == '\\' && s[1] != 0) *t++ = *(++s);
+ if (c == '\\' && s[1]) *t++ = *++s;
}
if (c == '\"')
{
else while (!mac_iscntrl_or_special(*s) || *s == '\\')
{
c = *t++ = *s++;
- if (c == '\\' && *s != 0) *t++ = *s++;
+ if (c == '\\' && *s) *t++ = *s++;
}
/* Terminate the word and skip subsequent comment */
parse_extract_address(uschar *mailbox, uschar **errorptr, int *start, int *end,
int *domain, BOOL allow_null)
{
-uschar *yield = store_get(Ustrlen(mailbox) + 1);
+uschar *yield = store_get(Ustrlen(mailbox) + 1, is_tainted(mailbox));
uschar *startptr, *endptr;
uschar *s = US mailbox;
uschar *t = US yield;
s = skip_comment(s);
startptr = s; /* In case addr-spec */
s = read_local_part(s, t, errorptr, TRUE); /* Dot separated words */
-if (*errorptr != NULL) goto PARSE_FAILED;
+if (*errorptr) goto PARSE_FAILED;
/* If the terminator is neither < nor @ then the format of the address
must either be a bare local-part (we are now at the end), or a phrase
end of string will produce a null local_part and therefore fail. We don't
need to keep updating t, as the phrase isn't to be kept. */
- while (*s != '<' && (!parse_allow_group || *s != ':'))
+ while (*s != '<' && (!f.parse_allow_group || *s != ':'))
{
s = read_local_part(s, t, errorptr, FALSE);
if (*errorptr)
if (*s == ':')
{
- parse_found_group = TRUE;
- parse_allow_group = FALSE;
+ f.parse_found_group = TRUE;
+ f.parse_allow_group = FALSE;
s++;
goto RESTART;
}
PARSE_SUCCEEDED:
if (*s != 0)
{
- if (parse_found_group && *s == ';')
+ if (f.parse_found_group && *s == ';')
{
- parse_found_group = FALSE;
- parse_allow_group = TRUE;
+ f.parse_found_group = FALSE;
+ f.parse_allow_group = TRUE;
}
else
{
this. We must, however, keep the flags correct. */
PARSE_FAILED:
-if (parse_found_group && *s == ';')
+if (f.parse_found_group && *s == ';')
{
- parse_found_group = FALSE;
- parse_allow_group = TRUE;
+ f.parse_found_group = FALSE;
+ f.parse_allow_group = TRUE;
}
return NULL;
}
/* This function is used for quoting text in headers according to RFC 2047.
If the only characters that strictly need quoting are spaces, we return the
-original string, unmodified. If a quoted string is too long for the buffer, it
-is truncated. (This shouldn't happen: this is normally handling short strings.)
+original string, unmodified.
Hmmph. As always, things get perverted for other uses. This function was
originally for the "phrase" part of addresses. Now it is being used for much
chars
len the length of the string
charset the name of the character set; NULL => iso-8859-1
- buffer the buffer to put the answer in
- buffer_size the size of the buffer
fold if TRUE, a newline is inserted before the separating space when
more than one encoded-word is generated
Returns: pointer to the original string, if no quoting needed, or
- pointer to buffer containing the quoted string, or
- a pointer to "String too long" if the buffer can't even hold
- the introduction
+ pointer to allocated memory containing the quoted string
*/
const uschar *
-parse_quote_2047(const uschar *string, int len, uschar *charset, uschar *buffer,
- int buffer_size, BOOL fold)
+parse_quote_2047(const uschar *string, int len, uschar *charset, BOOL fold)
{
-const uschar *s = string;
-uschar *p, *t;
-int hlen;
+const uschar * s = string;
+int hlen, l;
BOOL coded = FALSE;
BOOL first_byte = FALSE;
+gstring * g =
+ string_fmt_append(NULL, "=?%s?Q?", charset ? charset : US"iso-8859-1");
-if (charset == NULL) charset = US"iso-8859-1";
-
-/* We don't expect this to fail! */
-
-if (!string_format(buffer, buffer_size, "=?%s?Q?", charset))
- return US"String too long";
-
-hlen = Ustrlen(buffer);
-t = buffer + hlen;
-p = buffer;
+hlen = l = g->ptr;
-for (; len > 0; len--)
+for (s = string; len > 0; s++, len--)
{
- int ch = *s++;
- if (t > buffer + buffer_size - hlen - 8) break;
+ int ch = *s;
- if ((t - p > 67) && !first_byte)
+ if (g->ptr - l > 67 && !first_byte)
{
- *t++ = '?';
- *t++ = '=';
- if (fold) *t++ = '\n';
- *t++ = ' ';
- p = t;
- Ustrncpy(p, buffer, hlen);
- t += hlen;
+ g = fold ? string_catn(g, US"?=\n ", 4) : string_catn(g, US"?= ", 3);
+ l = g->ptr;
+ g = string_catn(g, g->s, hlen);
}
- if (ch < 33 || ch > 126 ||
- Ustrchr("?=()<>@,;:\\\".[]_", ch) != NULL)
+ if ( ch < 33 || ch > 126
+ || Ustrchr("?=()<>@,;:\\\".[]_", ch) != NULL)
{
if (ch == ' ')
{
- *t++ = '_';
+ g = string_catn(g, US"_", 1);
first_byte = FALSE;
}
else
{
- t += sprintf(CS t, "=%02X", ch);
+ g = string_fmt_append(g, "=%02X", ch);
coded = TRUE;
first_byte = !first_byte;
}
}
- else { *t++ = ch; first_byte = FALSE; }
+ else
+ { g = string_catn(g, s, 1); first_byte = FALSE; }
}
-*t++ = '?';
-*t++ = '=';
-*t = 0;
+if (coded)
+ string = string_from_gstring(g = string_catn(g, US"?=", 2));
+else
+ g->ptr = -1;
-return coded? buffer : string;
+gstring_release_unused(g);
+return string;
}
We *could* use this for all cases, getting rid of the messy original code,
but leave it for now. It would complicate simple cases like "John Q. Smith".
-The result is passed back in the buffer; it is usually going to be added to
-some other string. In order to be sure there is going to be no overflow,
-restrict the length of the input to 1/4 of the buffer size - this allows for
-every single character to be quoted or encoded without overflowing, and that
-wouldn't happen because of amalgamation. If the phrase is too long, return a
-fixed string.
+The result is passed back in allocated memory.
Arguments:
phrase an RFC822 phrase
len the length of the phrase
- buffer a buffer to put the result in
- buffer_size the size of the buffer
Returns: the fixed RFC822 phrase
*/
const uschar *
-parse_fix_phrase(const uschar *phrase, int len, uschar *buffer, int buffer_size)
+parse_fix_phrase(const uschar *phrase, int len)
{
int ch, i;
BOOL quoted = FALSE;
const uschar *s, *end;
+uschar * buffer;
uschar *t, *yield;
while (len > 0 && isspace(*phrase)) { phrase++; len--; }
-if (len > buffer_size/4) return US"Name too long";
/* See if there are any non-printing characters, and if so, use the RFC 2047
encoding for the whole thing. */
for (i = 0, s = phrase; i < len; i++, s++)
if ((*s < 32 && *s != '\t') || *s > 126) break;
-if (i < len) return parse_quote_2047(phrase, len, headers_charset, buffer,
- buffer_size, FALSE);
+if (i < len)
+ return parse_quote_2047(phrase, len, headers_charset, FALSE);
/* No non-printers; use the RFC 822 quoting rules */
+buffer = store_get(len*4, is_tainted(phrase));
+
s = phrase;
end = s + len;
yield = t = buffer + 1;
}
*t = 0;
+store_release_above(t+1);
return yield;
}
However, if the list is empty only because syntax errors were skipped, we
return FF_DELIVERED. */
- if (*s == 0)
+ if (!*s)
{
- return (count > 0 || (syntax_errors != NULL && *syntax_errors != NULL))?
- FF_DELIVERED : FF_NOTDELIVERED;
+ return (count > 0 || (syntax_errors && *syntax_errors))
+ ? FF_DELIVERED : FF_NOTDELIVERED;
/* This previous code returns FF_ERROR if nothing is generated but a
syntax error has been skipped. I now think it is the wrong approach, but
if (flen <= 0)
{
- *error = string_sprintf("file name missing after :include:");
+ *error = US"file name missing after :include:";
return FF_ERROR;
}
/* Insist on absolute path */
- if (filename[0]!= '/')
+ if (filename[0] != '/')
{
*error = string_sprintf("included file \"%s\" is not an absolute path",
filename);
/* Check if include is permitted */
- if ((options & RDO_INCLUDE) != 0)
+ if (options & RDO_INCLUDE)
{
*error = US"included files not permitted";
return FF_ERROR;
}
+ if (is_tainted(filename))
+ {
+ *error = string_sprintf("Tainted name '%s' for included file not permitted\n",
+ filename);
+ return FF_ERROR;
+ }
+
/* Check file name if required */
if (directory)
with a flag that fails symlinks. */
{
- int fd = open(CS directory, O_RDONLY);
+ int fd = exim_open2(CS directory, O_RDONLY);
if (fd < 0)
{
*error = string_sprintf("failed to open directory %s", directory);
temp = *p;
*p = '\0';
- fd2 = openat(fd, CS q, O_RDONLY|O_NOFOLLOW);
+ fd2 = exim_openat(fd, CS q, O_RDONLY|O_NOFOLLOW);
close(fd);
*p = temp;
if (fd2 < 0)
if (!f)
{
- *error = string_open_failed(errno, "included file %s", filename);
+ *error = string_open_failed("included file %s", filename);
return FF_INCLUDEFAIL;
}
return FF_ERROR;
}
- filebuf = store_get(statbuf.st_size + 1);
+ filebuf = store_get(statbuf.st_size + 1, is_tainted(filename));
if (fread(filebuf, 1, statbuf.st_size, f) != statbuf.st_size)
{
*error = string_sprintf("error while reading included file %s: %s",
{
recipient =
parse_extract_address(s+1, error, &start, &end, &domain, FALSE);
- if (recipient != NULL)
- recipient = (domain != 0)? NULL :
+ if (recipient)
+ recipient = domain != 0 ? NULL :
string_sprintf("%s@%s", recipient, incoming_domain);
}
/* Try parsing the item as an address. */
- if (recipient == NULL) recipient =
+ if (!recipient) recipient =
parse_extract_address(s, error, &start, &end, &domain, FALSE);
/* If item starts with / or | and is not a valid address, or there
if ((*s == '|' || *s == '/') && (recipient == NULL || domain == 0))
{
- uschar *t = store_get(Ustrlen(s) + 1);
+ uschar *t = store_get(Ustrlen(s) + 1, is_tainted(s));
uschar *p = t;
uschar *q = s;
while (*q != 0)
if (syntax_errors != NULL)
{
- error_block *e = store_get(sizeof(error_block));
+ error_block *e = store_get(sizeof(error_block), FALSE);
error_block *last = *syntax_errors;
if (last == NULL) *syntax_errors = e; else
{
{
uschar *domain = NULL;
uschar *id;
+rmark reset_point;
str = skip_comment(str);
if (*str != '<')
for the answer, but it may also be very long if we are processing a header
line. Therefore, take care to release unwanted store afterwards. */
-id = *yield = store_get(Ustrlen(str) + 1);
+reset_point = store_mark();
+id = *yield = store_get(Ustrlen(str) + 1, is_tainted(str));
*id++ = *str++;
str = read_addr_spec(str, id, '>', error, &domain);
-if (*error == NULL)
+if (!*error)
{
if (*str != '>') *error = US"Missing '>' after message-id";
else if (domain == NULL) *error = US"domain missing in message-id";
}
-if (*error != NULL)
+if (*error)
{
- store_reset(*yield);
+ store_reset(reset_point);
return NULL;
}
-while (*id != 0) id++;
+while (*id) id++;
*id++ = *str++;
*id++ = 0;
-store_reset(id);
+store_release_above(id);
str = skip_comment(str);
return str;
{
int start, end, domain;
uschar buffer[1024];
-uschar outbuff[1024];
big_buffer = store_malloc(big_buffer_size);
{
buffer[Ustrlen(buffer)-1] = 0;
if (buffer[0] == 0) break;
- printf("%s\n", CS parse_fix_phrase(buffer, Ustrlen(buffer), outbuff,
- sizeof(outbuff)));
+ printf("%s\n", CS parse_fix_phrase(buffer, Ustrlen(buffer)));
}
printf("Testing parse_extract_address without group syntax and without UTF-8\n");
buffer[Ustrlen(buffer) - 1] = 0;
if (buffer[0] == 0) break;
out = parse_extract_address(buffer, &errmess, &start, &end, &domain, FALSE);
- if (out == NULL) printf("*** bad address: %s\n", errmess); else
+ if (!out)
+ printf("*** bad address: %s\n", errmess);
+ else
{
uschar extract[1024];
Ustrncpy(extract, buffer+start, end-start);
buffer[Ustrlen(buffer) - 1] = 0;
if (buffer[0] == 0) break;
out = parse_extract_address(buffer, &errmess, &start, &end, &domain, FALSE);
- if (out == NULL) printf("*** bad address: %s\n", errmess); else
+ if (!out)
+ printf("*** bad address: %s\n", errmess);
+ else
{
uschar extract[1024];
Ustrncpy(extract, buffer+start, end-start);
printf("Testing parse_extract_address with group syntax\n");
-parse_allow_group = TRUE;
+f.parse_allow_group = TRUE;
while (Ufgets(buffer, sizeof(buffer), stdin) != NULL)
{
uschar *out;
buffer[Ustrlen(buffer) - 1] = 0;
if (buffer[0] == 0) break;
s = buffer;
- while (*s != 0)
+ while (*s)
{
uschar *ss = parse_find_address_end(s, FALSE);
int terminator = *ss;
out = parse_extract_address(buffer, &errmess, &start, &end, &domain, FALSE);
*ss = terminator;
- if (out == NULL) printf("*** bad address: %s\n", errmess); else
+ if (!out)
+ printf("*** bad address: %s\n", errmess);
+ else
{
uschar extract[1024];
Ustrncpy(extract, buffer+start, end-start);
}
s = ss + (terminator? 1:0);
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
}
}
git://git.exim.org / exim.git / blobdiff