/* pop.c: client routines for talking to a POP3-protocol post-office server
- Copyright (c) 1991, 1993, 1996 Free Software Foundation, Inc.
+ Copyright (c) 1991, 1993, 1996, 1997, 1999 Free Software Foundation, Inc.
Written by Jonathan Kamens, jik@security.ov.com.
This file is part of GNU Emacs.
#ifdef MAIL_USE_POP
-#ifdef HAVE_CONFIG_H
-/* Cancel these substitutions made in config.h */
-#undef open
-#undef read
-#undef write
-#undef close
-#endif
-
#include <sys/types.h>
#ifdef WINDOWSNT
#include "ntlib.h"
#include <netdb.h>
#include <errno.h>
#include <stdio.h>
+#ifdef STDC_HEADERS
+#include <string.h>
+#define index strchr
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
#ifdef KERBEROS
-#ifndef KRB5
-#ifndef SOLARIS2
-#include <des.h>
-#include <krb.h>
-#else /* not SOLARIS2 */
-#include <kerberos/des.h>
-#include <kerberos/krb.h>
-#endif /* not SOLARIS2 */
-#else /* KRB5 */
-#include <krb5/krb5.h>
-#include <krb5/ext-proto.h>
-#include <ctype.h>
-#endif /* KRB5 */
+# ifdef HAVE_KRB5_H
+# include <krb5.h>
+# endif
+# ifdef HAVE_DES_H
+# include <des.h>
+# else
+# ifdef HAVE_KERBEROSIV_DES_H
+# include <kerberosIV/des.h>
+# else
+# ifdef HAVE_KERBEROS_DES_H
+# include <kerberos/des.h>
+# endif
+# endif
+# endif
+# ifdef HAVE_KRB_H
+# include <krb.h>
+# else
+# ifdef HAVE_KERBEROSIV_KRB_H
+# include <kerberosIV/krb.h>
+# else
+# ifdef HAVE_KERBEROS_KRB_H
+# include <kerberos/krb.h>
+# endif
+# endif
+# endif
+# ifdef HAVE_COM_ERR_H
+# include <com_err.h>
+# endif
#endif /* KERBEROS */
-extern char *getenv (/* char * */);
-extern char *getlogin (/* void */);
-extern char *getpass (/* char * */);
-extern char *strerror (/* int */);
-extern char *index ();
-
#ifdef KERBEROS
-#ifndef KRB5
+#ifndef KERBEROS5
extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *,
u_long, MSG_DAT *, CREDENTIALS *, Key_schedule,
struct sockaddr_in *, struct sockaddr_in *,
char * */);
extern char *krb_realmofhost (/* char * */);
-#endif /* ! KRB5 */
+#endif /* ! KERBEROS5 */
#endif /* KERBEROS */
#ifndef WINDOWSNT
#endif
#endif
-static int socket_connection (/* char *, int */);
-static char *getline (/* popserver */);
-static int sendline (/* popserver, char * */);
-static int fullwrite (/* int, char *, int */);
-static int getok (/* popserver */);
+#ifndef _P
+# ifdef __STDC__
+# define _P(a) a
+# else
+# define _P(a) ()
+# endif /* __STDC__ */
+#endif /* ! __P */
+
+static int socket_connection _P((char *, int));
+static int pop_getline _P((popserver, char **));
+static int sendline _P((popserver, char *));
+static int fullwrite _P((int, char *, int));
+static int getok _P((popserver));
#if 0
-static int gettermination (/* popserver */);
+static int gettermination _P((popserver));
#endif
-static void pop_trash (/* popserver */);
-static char *find_crlf (/* char * */);
+static void pop_trash _P((popserver));
+static char *find_crlf _P((char *, int));
-#define ERROR_MAX 80 /* a pretty arbitrary size */
+#define ERROR_MAX 160 /* a pretty arbitrary size, but needs
+ to be bigger than the original
+ value of 80 */
#define POP_PORT 110
#define KPOP_PORT 1109
-#ifdef WINDOWSNT
#define POP_SERVICE "pop3" /* we don't want the POP2 port! */
-#else
-#define POP_SERVICE "pop"
-#endif
#ifdef KERBEROS
-#ifdef KRB5
-#define KPOP_SERVICE "k5pop";
-#else
#define KPOP_SERVICE "kpop"
#endif
-#endif
char pop_error[ERROR_MAX];
int pop_debug = 0;
return (-1);
}
- if (sendline (server, "STAT") || (! (fromserver = getline (server))))
+ if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0))
return (-1);
if (strncmp (fromserver, "+OK ", 4))
free ((char *) *sizes);
return (-1);
}
- if (! (fromserver = getline (server)))
+ if (pop_getline (server, &fromserver) < 0)
{
free ((char *) *IDs);
free ((char *) *sizes);
}
for (i = 0; i < how_many; i++)
{
- if (pop_multi_next (server, &fromserver))
+ if (pop_multi_next (server, &fromserver) <= 0)
{
free ((char *) *IDs);
free ((char *) *sizes);
}
(*sizes)[i] = atoi (fromserver);
}
- if (pop_multi_next (server, &fromserver))
+ if (pop_multi_next (server, &fromserver) < 0)
{
free ((char *) *IDs);
free ((char *) *sizes);
* markfrom
* If true, then mark the string "From " at the beginning
* of lines with '>'.
+ * msg_buf Output parameter to which a buffer containing the
+ * message is assigned.
*
- * Return value: A string pointing to the message, if successful, or
- * null with pop_error set if not.
+ * Return value: The number of bytes in msg_buf, which may contain
+ * embedded nulls, not including its final null, or -1 on error
+ * with pop_error set.
*
* Side effects: May kill connection on error.
*/
-char *
-pop_retrieve (server, message, markfrom)
+int
+pop_retrieve (server, message, markfrom, msg_buf)
popserver server;
int message;
int markfrom;
+ char **msg_buf;
{
int *IDs, *sizes, bufsize, fromcount = 0, cp = 0;
char *ptr, *fromserver;
if (server->in_multi)
{
strcpy (pop_error, "In multi-line query in pop_retrieve");
- return (0);
+ return (-1);
}
if (pop_list (server, message, &IDs, &sizes))
- return (0);
+ return (-1);
if (pop_retrieve_first (server, message, &fromserver))
{
- return (0);
+ return (-1);
}
/*
{
strcpy (pop_error, "Out of memory in pop_retrieve");
pop_retrieve_flush (server);
- return (0);
+ return (-1);
}
- while (! (ret = pop_retrieve_next (server, &fromserver)))
+ while ((ret = pop_retrieve_next (server, &fromserver)) >= 0)
{
- int linesize;
-
if (! fromserver)
{
ptr[cp] = '\0';
- return (ptr);
+ *msg_buf = ptr;
+ return (cp);
}
if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' &&
fromserver[2] == 'o' && fromserver[3] == 'm' &&
{
strcpy (pop_error, "Out of memory in pop_retrieve");
pop_retrieve_flush (server);
- return (0);
+ return (-1);
}
fromcount = 0;
}
ptr[cp++] = '>';
}
- linesize = strlen (fromserver);
- bcopy (fromserver, &ptr[cp], linesize);
- cp += linesize;
+ bcopy (fromserver, &ptr[cp], ret);
+ cp += ret;
ptr[cp++] = '\n';
}
- if (ret)
- {
- free (ptr);
- return (0);
- }
+ free (ptr);
+ return (-1);
}
int
return (pop_multi_first (server, pop_error, response));
}
+/*
+ Returns a negative number on error, 0 to indicate that the data has
+ all been read (i.e., the server has returned a "." termination
+ line), or a positive number indicating the number of bytes in the
+ returned buffer (which is null-terminated and may contain embedded
+ nulls, but the returned bytecount doesn't include the final null).
+ */
+
int
pop_retrieve_next (server, line)
popserver server;
return (pop_multi_first (server, pop_error, response));
}
+/*
+ Returns a negative number on error, 0 to indicate that the data has
+ all been read (i.e., the server has returned a "." termination
+ line), or a positive number indicating the number of bytes in the
+ returned buffer (which is null-terminated and may contain embedded
+ nulls, but the returned bytecount doesn't include the final null).
+ */
+
int
pop_top_next (server, line)
popserver server;
return (-1);
}
- if (sendline (server, command) || (! (*response = getline (server))))
+ if (sendline (server, command) || (pop_getline (server, response) < 0))
{
return (-1);
}
}
}
+/*
+ Read the next line of data from SERVER and place a pointer to it
+ into LINE. Return -1 on error, 0 if there are no more lines to read
+ (i.e., the server has returned a line containing only "."), or a
+ positive number indicating the number of bytes in the LINE buffer
+ (not including the final null). The data in that buffer may contain
+ embedded nulls, but does not contain the final CRLF. When returning
+ 0, LINE is set to null. */
+
int
pop_multi_next (server, line)
popserver server;
char **line;
{
char *fromserver;
+ int ret;
if (! server->in_multi)
{
return (-1);
}
- fromserver = getline (server);
- if (! fromserver)
+ if ((ret = pop_getline (server, &fromserver)) < 0)
{
return (-1);
}
else
{
*line = fromserver + 1;
- return (0);
+ return (ret - 1);
}
}
else
{
*line = fromserver;
- return (0);
+ return (ret);
}
}
popserver server;
{
char *line;
+ int ret;
if (! server->in_multi)
{
return (0);
}
- while (! pop_multi_next (server, &line))
+ while ((ret = pop_multi_next (server, &line)))
{
- if (! line)
- {
- return (0);
- }
+ if (ret < 0)
+ return (-1);
}
- return (-1);
+ return (0);
}
/* Function: pop_delete
if (sendline (server, "LAST"))
return (-1);
- if (! (fromserver = getline (server)))
+ if (pop_getline (server, &fromserver) < 0)
return (-1);
if (! strncmp (fromserver, "-ERR", 4))
char *service;
int sock;
#ifdef KERBEROS
-#ifdef KRB5
+#ifdef KERBEROS5
krb5_error_code rem;
+ krb5_context kcontext = 0;
+ krb5_auth_context auth_context = 0;
krb5_ccache ccdef;
krb5_principal client, server;
krb5_error *err_ret;
Key_schedule schedule;
int rem;
char *realhost;
-#endif /* KRB5 */
+#endif /* KERBEROS5 */
#endif /* KERBEROS */
int try_count = 0;
}
}
-#define SOCKET_ERROR "Could not create socket for POP connection: "
+#define POP_SOCKET_ERROR "Could not create socket for POP connection: "
sock = socket (PF_INET, SOCK_STREAM, 0);
if (sock < 0)
{
- strcpy (pop_error, SOCKET_ERROR);
+ strcpy (pop_error, POP_SOCKET_ERROR);
strncat (pop_error, strerror (errno),
- ERROR_MAX - sizeof (SOCKET_ERROR));
+ ERROR_MAX - sizeof (POP_SOCKET_ERROR));
return (-1);
}
#define KRB_ERROR "Kerberos error connecting to POP server: "
if (! (flags & POP_NO_KERBEROS))
{
-#ifdef KRB5
- krb5_init_ets ();
-
- if (rem = krb5_cc_default (&ccdef))
+#ifdef KERBEROS5
+ if ((rem = krb5_init_context (&kcontext)))
{
krb5error:
+ if (auth_context)
+ krb5_auth_con_free (kcontext, auth_context);
+ if (kcontext)
+ krb5_free_context (kcontext);
strcpy (pop_error, KRB_ERROR);
strncat (pop_error, error_message (rem),
ERROR_MAX - sizeof(KRB_ERROR));
return (-1);
}
- if (rem = krb5_cc_get_principal (ccdef, &client))
- {
- goto krb5error;
- }
+ if ((rem = krb5_auth_con_init (kcontext, &auth_context)))
+ goto krb5error;
+
+ if (rem = krb5_cc_default (kcontext, &ccdef))
+ goto krb5error;
+
+ if (rem = krb5_cc_get_principal (kcontext, ccdef, &client))
+ goto krb5error;
for (cp = hostent->h_name; *cp; cp++)
{
}
}
- if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE,
- FALSE, &server))
- {
- goto krb5error;
- }
+ if (rem = krb5_sname_to_principal (kcontext, hostent->h_name,
+ POP_SERVICE, FALSE, &server))
+ goto krb5error;
- rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server,
+ rem = krb5_sendauth (kcontext, &auth_context,
+ (krb5_pointer) &sock, "KPOPV1.0", client, server,
AP_OPTS_MUTUAL_REQUIRED,
0, /* no checksum */
0, /* no creds, use ccache instead */
ccdef,
- 0, /* don't need seq # */
- 0, /* don't need subsession key */
&err_ret,
+ 0, /* don't need subsession key */
0); /* don't need reply */
- krb5_free_principal (server);
+ krb5_free_principal (kcontext, server);
if (rem)
{
if (err_ret && err_ret->text.length)
ERROR_MAX - sizeof (KRB_ERROR));
}
if (err_ret)
- krb5_free_error (err_ret);
+ krb5_free_error (kcontext, err_ret);
+ krb5_auth_con_free (kcontext, auth_context);
+ krb5_free_context (kcontext);
CLOSESOCKET (sock);
return (-1);
}
-#else /* ! KRB5 */
+#else /* ! KERBEROS5 */
ticket = (KTEXT) malloc (sizeof (KTEXT_ST));
realhost = strdup (hostent->h_name);
rem = krb_sendauth (0L, sock, ticket, "pop", realhost,
CLOSESOCKET (sock);
return (-1);
}
-#endif /* KRB5 */
+#endif /* KERBEROS5 */
}
#endif /* KERBEROS */
} /* socket_connection */
/*
- * Function: getline
+ * Function: pop_getline
*
* Purpose: Get a line of text from the connection and return a
* pointer to it. The carriage return and linefeed at the end of
* Arguments:
* server The server from which to get the line of text.
*
- * Returns: A non-null pointer if successful, or a null pointer on any
- * error, with an error message copied into pop_error.
+ * Returns: The number of characters in the line, which is returned in
+ * LINE, not including the final null. A return value of 0
+ * indicates a blank line. A negative return value indicates an
+ * error (in which case the contents of LINE are undefined. In
+ * case of error, an error message is copied into pop_error.
*
- * Notes: The line returned is overwritten with each call to getline.
+ * Notes: The line returned is overwritten with each call to pop_getline.
*
* Side effects: Closes the connection on error.
+ *
+ * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS!
*/
-static char *
-getline (server)
+static int
+pop_getline (server, line)
popserver server;
+ char **line;
{
#define GETLINE_ERROR "Error reading from server: "
if (server->data)
{
- char *cp = find_crlf (server->buffer + server->buffer_index);
+ char *cp = find_crlf (server->buffer + server->buffer_index,
+ server->data);
if (cp)
{
int found;
server->buffer_index += data_used;
if (pop_debug)
+ /* Embedded nulls will truncate this output prematurely,
+ but that's OK because it's just for debugging anyway. */
fprintf (stderr, "<<< %s\n", server->buffer + found);
- return (server->buffer + found);
+ *line = server->buffer + found;
+ return (data_used - 2);
}
else
{
server->buffer = (char *)realloc (server->buffer, server->buffer_size);
if (! server->buffer)
{
- strcpy (pop_error, "Out of memory in getline");
+ strcpy (pop_error, "Out of memory in pop_getline");
pop_trash (server);
- return (0);
+ return (-1);
}
}
ret = RECV (server->file, server->buffer + server->data,
strncat (pop_error, strerror (errno),
ERROR_MAX - sizeof (GETLINE_ERROR));
pop_trash (server);
- return (0);
+ return (-1);
}
else if (ret == 0)
{
- strcpy (pop_error, "Unexpected EOF from server in getline");
+ strcpy (pop_error, "Unexpected EOF from server in pop_getline");
pop_trash (server);
- return (0);
+ return (-1);
}
else
{
server->data += ret;
server->buffer[server->data] = '\0';
- cp = find_crlf (server->buffer + search_offset);
+ cp = find_crlf (server->buffer + search_offset,
+ server->data - search_offset);
if (cp)
{
int data_used = (cp + 2) - server->buffer;
if (pop_debug)
fprintf (stderr, "<<< %s\n", server->buffer);
- return (server->buffer);
+ *line = server->buffer;
+ return (data_used - 2);
}
- search_offset += ret;
+ /* As above, the "- 1" here is to account for the fact that
+ we may have read a CR without its accompanying LF. */
+ search_offset += ret - 1;
}
}
int nbytes;
{
char *cp;
- int ret;
+ int ret = 0;
cp = buf;
- while ((ret = SEND (fd, cp, nbytes, 0)) > 0)
+ while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0))
{
cp += ret;
nbytes -= ret;
{
char *fromline;
- if (! (fromline = getline (server)))
+ if (pop_getline (server, &fromline) < 0)
{
return (-1);
}
{
char *fromserver;
- fromserver = getline (server);
- if (! fromserver)
+ if (pop_getline (server, &fromserver) < 0)
return (-1);
if (strcmp (fromserver, "."))
#endif
}
-/* Return a pointer to the first CRLF in IN_STRING,
- or 0 if it does not contain one. */
+/* Return a pointer to the first CRLF in IN_STRING, which can contain
+ embedded nulls and has LEN characters in it not including the final
+ null, or 0 if it does not contain one. */
static char *
-find_crlf (in_string)
+find_crlf (in_string, len)
char *in_string;
+ int len;
{
- while (1)
+ while (len--)
{
- if (! *in_string)
- return (0);
- else if (*in_string == '\r')
+ if (*in_string == '\r')
{
if (*++in_string == '\n')
return (in_string - 1);
else
in_string++;
}
- /* NOTREACHED */
+ return (0);
}
#endif /* MAIL_USE_POP */
HCoop / bpt / emacs.git / blobdiff