/*
* mbsync - mailbox synchronizer
* Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
* Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
* Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, mbsync may be linked with the OpenSSL library,
* despite that library's more restrictive license.
*/
#include "isync.h"
#include <assert.h>
#include <unistd.h>
#include <limits.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <limits.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#if HAVE_LIBSSL
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/hmac.h>
#endif
typedef struct imap_server_conf {
struct imap_server_conf *next;
char *name;
char *tunnel;
char *host;
int port;
char *user;
char *pass;
#if HAVE_LIBSSL
char *cert_file;
unsigned use_imaps:1;
unsigned require_ssl:1;
unsigned use_sslv2:1;
unsigned use_sslv3:1;
unsigned use_tlsv1:1;
unsigned require_cram:1;
#endif
} imap_server_conf_t;
typedef struct imap_store_conf {
store_conf_t gen;
imap_server_conf_t *server;
unsigned use_namespace:1;
} imap_store_conf_t;
typedef struct imap_message {
message_t gen;
/* int seq; will be needed when expunges are tracked */
} imap_message_t;
#define NIL (void*)0x1
#define LIST (void*)0x2
typedef struct _list {
struct _list *next, *child;
char *val;
int len;
} list_t;
typedef struct {
int fd;
#if HAVE_LIBSSL
SSL *ssl;
unsigned int use_ssl:1;
#endif
} Socket_t;
typedef struct {
Socket_t sock;
int bytes;
int offset;
char buf[1024];
} buffer_t;
struct imap_cmd;
#define max_in_progress 50 /* make this configurable? */
typedef struct imap {
int uidnext; /* from SELECT responses */
list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
string_list_t *boxes; /* LIST results */
message_t **msgapp; /* FETCH results */
unsigned caps, rcaps; /* CAPABILITY results */
/* command queue */
int nexttag, num_in_progress, literal_pending;
struct imap_cmd *in_progress, **in_progress_append;
#if HAVE_LIBSSL
SSL_CTX *SSLContext;
#endif
buffer_t buf; /* this is BIG, so put it last */
} imap_t;
typedef struct imap_store {
store_t gen;
imap_t *imap;
const char *prefix;
unsigned /*currentnc:1,*/ trashnc:1;
} imap_store_t;
struct imap_cmd_cb {
int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response);
void *ctx;
char *data;
int dlen;
int uid;
unsigned create:1, trycreate:1;
};
struct imap_cmd {
struct imap_cmd *next;
struct imap_cmd_cb cb;
char *cmd;
int tag;
};
#define CAP(cap) (imap->caps & (1 << (cap)))
enum CAPABILITY {
NOLOGIN = 0,
UIDPLUS,
LITERALPLUS,
NAMESPACE,
#if HAVE_LIBSSL
CRAM,
STARTTLS,
#endif
};
static const char *cap_list[] = {
"LOGINDISABLED",
"UIDPLUS",
"LITERAL+",
"NAMESPACE",
#if HAVE_LIBSSL
"AUTH=CRAM-MD5",
"STARTTLS",
#endif
};
#define RESP_OK 0
#define RESP_NO 1
#define RESP_BAD 2
static int get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd );
static const char *Flags[] = {
"Draft",
"Flagged",
"Answered",
"Seen",
"Deleted",
};
#if HAVE_LIBSSL
/* this gets called when a certificate is to be verified */
static int
verify_cert( SSL *ssl )
{
X509 *cert;
int err;
char buf[256];
int ret = -1;
BIO *bio;
cert = SSL_get_peer_certificate( ssl );
if (!cert) {
fprintf( stderr, "Error, no server certificate\n" );
return -1;
}
err = SSL_get_verify_result( ssl );
if (err == X509_V_OK)
return 0;
fprintf( stderr, "Error, can't verify certificate: %s (%d)\n",
X509_verify_cert_error_string(err), err );
X509_NAME_oneline( X509_get_subject_name( cert ), buf, sizeof(buf) );
info( "\nSubject: %s\n", buf );
X509_NAME_oneline( X509_get_issuer_name( cert ), buf, sizeof(buf) );
info( "Issuer: %s\n", buf );
bio = BIO_new( BIO_s_mem() );
ASN1_TIME_print( bio, X509_get_notBefore( cert ) );
memset( buf, 0, sizeof(buf) );
BIO_read( bio, buf, sizeof(buf) - 1 );
info( "Valid from: %s\n", buf );
ASN1_TIME_print( bio, X509_get_notAfter( cert ) );
memset( buf, 0, sizeof(buf) );
BIO_read( bio, buf, sizeof(buf) - 1 );
BIO_free( bio );
info( " to: %s\n", buf );
fputs( "\n*** WARNING *** There is no way to verify this certificate. It is\n"
" possible that a hostile attacker has replaced the\n"
" server certificate. Continue at your own risk!\n"
"\nAccept this certificate anyway? [no]: ", stderr );
if (fgets( buf, sizeof(buf), stdin ) && (buf[0] == 'y' || buf[0] == 'Y')) {
ret = 0;
fprintf( stderr, "\n*** Fine, but don't say I didn't warn you!\n\n" );
}
return ret;
}
static int
init_ssl_ctx( imap_store_t *ctx )
{
imap_t *imap = ctx->imap;
imap_store_conf_t *conf = (imap_store_conf_t *)ctx->gen.conf;
imap_server_conf_t *srvc = conf->server;
SSL_METHOD *method;
int options = 0;
if (srvc->use_tlsv1 && !srvc->use_sslv2 && !srvc->use_sslv3)
method = TLSv1_client_method();
else
method = SSLv23_client_method();
imap->SSLContext = SSL_CTX_new( method );
if (!srvc->cert_file) {
fprintf( stderr, "Error, CertificateFile not defined\n" );
return -1;
} else if (!SSL_CTX_load_verify_locations( imap->SSLContext, srvc->cert_file, NULL )) {
fprintf( stderr, "Error while loading certificate file '%s': %s\n",
srvc->cert_file, ERR_error_string( ERR_get_error(), 0 ) );
return -1;
}
if (!srvc->use_sslv2)
options |= SSL_OP_NO_SSLv2;
if (!srvc->use_sslv3)
options |= SSL_OP_NO_SSLv3;
if (!srvc->use_tlsv1)
options |= SSL_OP_NO_TLSv1;
SSL_CTX_set_options( imap->SSLContext, options );
/* we check the result of the verification after SSL_connect() */
SSL_CTX_set_verify( imap->SSLContext, SSL_VERIFY_NONE, 0 );
return 0;
}
#endif /* HAVE_LIBSSL */
static void
socket_perror( const char *func, Socket_t *sock, int ret )
{
#if HAVE_LIBSSL
int err;
if (sock->use_ssl) {
switch ((err = SSL_get_error( sock->ssl, ret ))) {
case SSL_ERROR_SYSCALL:
case SSL_ERROR_SSL:
if ((err = ERR_get_error()) == 0) {
if (ret == 0)
fprintf( stderr, "SSL_%s:got EOF\n", func );
else
fprintf( stderr, "SSL_%s:%d:%s\n", func, errno, strerror(errno) );
} else
fprintf( stderr, "SSL_%s:%d:%s\n", func, err, ERR_error_string( err, 0 ) );
return;
default:
fprintf( stderr, "SSL_%s:%d:unhandled SSL error\n", func, err );
break;
}
return;
}
#else
(void)sock;
#endif
if (ret < 0)
perror( func );
else
fprintf( stderr, "%s: unexpected EOF\n", func );
}
static int
socket_read( Socket_t *sock, char *buf, int len )
{
int n =
#if HAVE_LIBSSL
sock->use_ssl ? SSL_read( sock->ssl, buf, len ) :
#endif
read( sock->fd, buf, len );
if (n <= 0) {
socket_perror( "read", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}
static int
socket_write( Socket_t *sock, char *buf, int len )
{
int n =
#if HAVE_LIBSSL
sock->use_ssl ? SSL_write( sock->ssl, buf, len ) :
#endif
write( sock->fd, buf, len );
if (n != len) {
socket_perror( "write", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}
static int
socket_pending( Socket_t *sock )
{
int num = -1;
if (ioctl( sock->fd, FIONREAD, &num ) < 0)
return -1;
if (num > 0)
return num;
#if HAVE_LIBSSL
if (sock->use_ssl)
return SSL_pending( sock->ssl );
#endif
return 0;
}
/* simple line buffering */
static int
buffer_gets( buffer_t * b, char **s )
{
int n;
int start = b->offset;
*s = b->buf + start;
for (;;) {
/* make sure we have enough data to read the \r\n sequence */
if (b->offset + 1 >= b->bytes) {
if (start) {
/* shift down used bytes */
*s = b->buf;
assert( start <= b->bytes );
n = b->bytes - start;
if (n)
memcpy( b->buf, b->buf + start, n );
b->offset -= start;
b->bytes = n;
start = 0;
}
n = socket_read( &b->sock, b->buf + b->bytes,
sizeof(b->buf) - b->bytes );
if (n <= 0)
return -1;
b->bytes += n;
}
if (b->buf[b->offset] == '\r') {
assert( b->offset + 1 < b->bytes );
if (b->buf[b->offset + 1] == '\n') {
b->buf[b->offset] = 0; /* terminate the string */
b->offset += 2; /* next line */
if (Verbose)
puts( *s );
return 0;
}
}
b->offset++;
}
/* not reached */
}
static struct imap_cmd *
v_issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb,
const char *fmt, va_list ap )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmd;
int n, bufl;
char buf[1024];
cmd = nfmalloc( sizeof(struct imap_cmd) );
nfvasprintf( &cmd->cmd, fmt, ap );
cmd->tag = ++imap->nexttag;
if (cb)
cmd->cb = *cb;
else
memset( &cmd->cb, 0, sizeof(cmd->cb) );
while (imap->literal_pending)
get_cmd_result( ctx, 0 );
bufl = nfsnprintf( buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
"%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
cmd->tag, cmd->cmd, cmd->cb.dlen );
if (Verbose) {
if (imap->num_in_progress)
printf( "(%d in progress) ", imap->num_in_progress );
if (memcmp( cmd->cmd, "LOGIN", 5 ))
printf( ">>> %s", buf );
else
printf( ">>> %d LOGIN <user> <pass>\n", cmd->tag );
}
if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
free( cmd->cmd );
free( cmd );
if (cb && cb->data)
free( cb->data );
return NULL;
}
if (cmd->cb.data) {
if (CAP(LITERALPLUS)) {
n = socket_write( &imap->buf.sock, cmd->cb.data, cmd->cb.dlen );
free( cmd->cb.data );
if (n != cmd->cb.dlen ||
(n = socket_write( &imap->buf.sock, "\r\n", 2 )) != 2)
{
free( cmd->cmd );
free( cmd );
return NULL;
}
cmd->cb.data = 0;
} else
imap->literal_pending = 1;
} else if (cmd->cb.cont)
imap->literal_pending = 1;
cmd->next = 0;
*imap->in_progress_append = cmd;
imap->in_progress_append = &cmd->next;
imap->num_in_progress++;
return cmd;
}
static struct imap_cmd *
issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
struct imap_cmd *ret;
va_list ap;
va_start( ap, fmt );
ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
return ret;
}
static struct imap_cmd *
issue_imap_cmd_w( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
imap_t *imap = ctx->imap;
struct imap_cmd *ret;
va_list ap;
va_start( ap, fmt );
ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
while (imap->num_in_progress > max_in_progress ||
socket_pending( &imap->buf.sock ))
get_cmd_result( ctx, 0 );
return ret;
}
static int
imap_exec( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;
va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return RESP_BAD;
return get_cmd_result( ctx, cmdp );
}
static int
imap_exec_b( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;
va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return DRV_STORE_BAD;
switch (get_cmd_result( ctx, cmdp )) {
case RESP_BAD: return DRV_STORE_BAD;
case RESP_NO: return DRV_BOX_BAD;
default: return DRV_OK;
}
}
static int
imap_exec_m( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;
va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return DRV_STORE_BAD;
switch (get_cmd_result( ctx, cmdp )) {
case RESP_BAD: return DRV_STORE_BAD;
case RESP_NO: return DRV_MSG_BAD;
default: return DRV_OK;
}
}
/*
static void
drain_imap_replies( imap_t *imap )
{
while (imap->num_in_progress)
get_cmd_result( imap, 0 );
}
*/
static int
is_atom( list_t *list )
{
return list && list->val && list->val != NIL && list->val != LIST;
}
static int
is_list( list_t *list )
{
return list && list->val == LIST;
}
static void
free_list( list_t *list )
{
list_t *tmp;
for (; list; list = tmp) {
tmp = list->next;
if (is_list( list ))
free_list( list->child );
else if (is_atom( list ))
free( list->val );
free( list );
}
}
static int
parse_imap_list_l( imap_t *imap, char **sp, list_t **curp, int level )
{
list_t *cur;
char *s = *sp, *p;
int n, bytes;
for (;;) {
while (isspace( (unsigned char)*s ))
s++;
if (level && *s == ')') {
s++;
break;
}
*curp = cur = nfmalloc( sizeof(*cur) );
curp = &cur->next;
cur->val = 0; /* for clean bail */
if (*s == '(') {
/* sublist */
s++;
cur->val = LIST;
if (parse_imap_list_l( imap, &s, &cur->child, level + 1 ))
goto bail;
} else if (imap && *s == '{') {
/* literal */
bytes = cur->len = strtol( s + 1, &s, 10 );
if (*s != '}')
goto bail;
s = cur->val = nfmalloc( cur->len );
/* dump whats left over in the input buffer */
n = imap->buf.bytes - imap->buf.offset;
if (n > bytes)
/* the entire message fit in the buffer */
n = bytes;
memcpy( s, imap->buf.buf + imap->buf.offset, n );
s += n;
bytes -= n;
/* mark that we used part of the buffer */
imap->buf.offset += n;
/* now read the rest of the message */
while (bytes > 0) {
if ((n = socket_read (&imap->buf.sock, s, bytes)) <= 0)
goto bail;
s += n;
bytes -= n;
}
if (buffer_gets( &imap->buf, &s ))
goto bail;
} else if (*s == '"') {
/* quoted string */
s++;
p = s;
for (; *s != '"'; s++)
if (!*s)
goto bail;
cur->len = s - p;
s++;
cur->val = nfmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
} else {
/* atom */
p = s;
for (; *s && !isspace( (unsigned char)*s ); s++)
if (level && *s == ')')
break;
cur->len = s - p;
if (cur->len == 3 && !memcmp ("NIL", p, 3))
cur->val = NIL;
else {
cur->val = nfmalloc( cur->len + 1 );
memcpy( cur->val, p, cur->len );
cur->val[cur->len] = 0;
}
}
if (!level)
break;
if (!*s)
goto bail;
}
*sp = s;
*curp = 0;
return 0;
bail:
*curp = 0;
return -1;
}
static list_t *
parse_imap_list( imap_t *imap, char **sp )
{
list_t *head;
if (!parse_imap_list_l( imap, sp, &head, 0 ))
return head;
free_list( head );
return NULL;
}
static list_t *
parse_list( char **sp )
{
return parse_imap_list( 0, sp );
}
static int
parse_fetch( imap_t *imap, char *cmd ) /* move this down */
{
list_t *tmp, *list, *flags;
char *body = 0;
imap_message_t *cur;
msg_data_t *msgdata;
struct imap_cmd *cmdp;
int uid = 0, mask = 0, status = 0, size = 0;
unsigned i;
list = parse_imap_list( imap, &cmd );
if (!is_list( list )) {
fprintf( stderr, "IMAP error: bogus FETCH response\n" );
free_list( list );
return -1;
}
for (tmp = list->child; tmp; tmp = tmp->next) {
if (is_atom( tmp )) {
if (!strcmp( "UID", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp ))
uid = atoi( tmp->val );
else
fprintf( stderr, "IMAP error: unable to parse UID\n" );
} else if (!strcmp( "FLAGS", tmp->val )) {
tmp = tmp->next;
if (is_list( tmp )) {
for (flags = tmp->child; flags; flags = flags->next) {
if (is_atom( flags )) {
if (flags->val[0] == '\\') { /* ignore user-defined flags for now */
if (!strcmp( "Recent", flags->val + 1)) {
status |= M_RECENT;
goto flagok;
}
for (i = 0; i < as(Flags); i++)
if (!strcmp( Flags[i], flags->val + 1 )) {
mask |= 1 << i;
goto flagok;
}
fprintf( stderr, "IMAP warning: unknown system flag %s\n", flags->val );
}
flagok: ;
} else
fprintf( stderr, "IMAP error: unable to parse FLAGS list\n" );
}
status |= M_FLAGS;
} else
fprintf( stderr, "IMAP error: unable to parse FLAGS\n" );
} else if (!strcmp( "RFC822.SIZE", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp ))
size = atoi( tmp->val );
else
fprintf( stderr, "IMAP error: unable to parse SIZE\n" );
} else if (!strcmp( "BODY[]", tmp->val )) {
tmp = tmp->next;
if (is_atom( tmp )) {
body = tmp->val;
tmp->val = 0; /* don't free together with list */
size = tmp->len;
} else
fprintf( stderr, "IMAP error: unable to parse BODY[]\n" );
}
}
}
if (body) {
for (cmdp = imap->in_progress; cmdp; cmdp = cmdp->next)
if (cmdp->cb.uid == uid)
goto gotuid;
fprintf( stderr, "IMAP error: unexpected FETCH response (UID %d)\n", uid );
free_list( list );
return -1;
gotuid:
msgdata = (msg_data_t *)cmdp->cb.ctx;
msgdata->data = body;
msgdata->len = size;
msgdata->crlf = 1;
if (status & M_FLAGS)
msgdata->flags = mask;
} else if (uid) { /* ignore async flag updates for now */
/* XXX this will need sorting for out-of-order (multiple queries) */
cur = nfcalloc( sizeof(*cur) );
*imap->msgapp = &cur->gen;
imap->msgapp = &cur->gen.next;
cur->gen.next = 0;
cur->gen.uid = uid;
cur->gen.flags = mask;
cur->gen.status = status;
cur->gen.size = size;
}
free_list( list );
return 0;
}
static void
parse_capability( imap_t *imap, char *cmd )
{
char *arg;
unsigned i;
imap->caps = 0x80000000;
while ((arg = next_arg( &cmd )))
for (i = 0; i < as(cap_list); i++)
if (!strcmp( cap_list[i], arg ))
imap->caps |= 1 << i;
imap->rcaps = imap->caps;
}
static int
parse_response_code( imap_store_t *ctx, struct imap_cmd_cb *cb, char *s )
{
imap_t *imap = ctx->imap;
char *arg, *p;
if (*s != '[')
return RESP_OK; /* no response code */
s++;
if (!(p = strchr( s, ']' ))) {
fprintf( stderr, "IMAP error: malformed response code\n" );
return RESP_BAD;
}
*p++ = 0;
arg = next_arg( &s );
if (!strcmp( "UIDVALIDITY", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed UIDVALIDITY status\n" );
return RESP_BAD;
}
} else if (!strcmp( "UIDNEXT", arg )) {
if (!(arg = next_arg( &s )) || !(imap->uidnext = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed NEXTUID status\n" );
return RESP_BAD;
}
} else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( imap, s );
} else if (!strcmp( "ALERT", arg )) {
/* RFC2060 says that these messages MUST be displayed
* to the user
*/
for (; isspace( (unsigned char)*p ); p++);
fprintf( stderr, "*** IMAP ALERT *** %s\n", p );
} else if (cb && cb->ctx && !strcmp( "APPENDUID", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg )) ||
!(arg = next_arg( &s )) || !(*(int *)cb->ctx = atoi( arg )))
{
fprintf( stderr, "IMAP error: malformed APPENDUID status\n" );
return RESP_BAD;
}
}
return RESP_OK;
}
static void
parse_search( imap_t *imap, char *cmd )
{
char *arg;
struct imap_cmd *cmdp;
int uid;
arg = next_arg( &cmd );
if (!arg || !(uid = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed SEARCH response\n" );
return;
}
/* Find the first command that expects a UID - this is guaranteed
* to come in-order, as there are no other means to identify which
* SEARCH response belongs to which request.
*/
for (cmdp = imap->in_progress; cmdp; cmdp = cmdp->next)
if (cmdp->cb.uid == -1) {
*(int *)cmdp->cb.ctx = uid;
return;
}
fprintf( stderr, "IMAP error: unexpected SEARCH response (UID %u)\n", uid );
}
static void
parse_list_rsp( imap_store_t *ctx, char *cmd )
{
imap_t *imap = ctx->imap;
char *arg;
list_t *list, *lp;
int l;
list = parse_list( &cmd );
if (list->val == LIST)
for (lp = list->child; lp; lp = lp->next)
if (is_atom( lp ) && !strcasecmp( lp->val, "\\NoSelect" )) {
free_list( list );
return;
}
free_list( list );
(void) next_arg( &cmd ); /* skip delimiter */
arg = next_arg( &cmd );
l = strlen( ctx->gen.conf->path );
if (memcmp( arg, ctx->gen.conf->path, l ))
return;
arg += l;
if (!memcmp( arg + strlen( arg ) - 5, ".lock", 5 )) /* workaround broken servers */
return;
add_string_list( &imap->boxes, arg );
}
static int
get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmdp, **pcmdp, *ncmdp;
char *cmd, *arg, *arg1, *p;
int n, resp, resp2, tag;
for (;;) {
if (buffer_gets( &imap->buf, &cmd ))
return RESP_BAD;
arg = next_arg( &cmd );
if (*arg == '*') {
arg = next_arg( &cmd );
if (!arg) {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}
if (!strcmp( "NAMESPACE", arg )) {
imap->ns_personal = parse_list( &cmd );
imap->ns_other = parse_list( &cmd );
imap->ns_shared = parse_list( &cmd );
} else if (!strcmp( "OK", arg ) || !strcmp( "BAD", arg ) ||
!strcmp( "NO", arg ) || !strcmp( "BYE", arg )) {
if ((resp = parse_response_code( ctx, 0, cmd )) != RESP_OK)
return resp;
} else if (!strcmp( "CAPABILITY", arg ))
parse_capability( imap, cmd );
else if (!strcmp( "LIST", arg ))
parse_list_rsp( ctx, cmd );
else if (!strcmp( "SEARCH", arg ))
parse_search( imap, cmd );
else if ((arg1 = next_arg( &cmd ))) {
if (!strcmp( "EXISTS", arg1 ))
ctx->gen.count = atoi( arg );
else if (!strcmp( "RECENT", arg1 ))
ctx->gen.recent = atoi( arg );
else if(!strcmp ( "FETCH", arg1 )) {
if (parse_fetch( imap, cmd ))
return RESP_BAD;
}
} else {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}
} else if (!imap->in_progress) {
fprintf( stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
return RESP_BAD;
} else if (*arg == '+') {
/* This can happen only with the last command underway, as
it enforces a round-trip. */
cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
offsetof(struct imap_cmd, next));
if (cmdp->cb.data) {
n = socket_write( &imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen );
free( cmdp->cb.data );
cmdp->cb.data = 0;
if (n != (int)cmdp->cb.dlen)
return RESP_BAD;
} else if (cmdp->cb.cont) {
if (cmdp->cb.cont( ctx, cmdp, cmd ))
return RESP_BAD;
} else {
fprintf( stderr, "IMAP error: unexpected command continuation request\n" );
return RESP_BAD;
}
if (socket_write( &imap->buf.sock, "\r\n", 2 ) != 2)
return RESP_BAD;
if (!cmdp->cb.cont)
imap->literal_pending = 0;
if (!tcmd)
return DRV_OK;
} else {
tag = atoi( arg );
for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
if (cmdp->tag == tag)
goto gottag;
fprintf( stderr, "IMAP error: unexpected tag %s\n", arg );
return RESP_BAD;
gottag:
if (!(*pcmdp = cmdp->next))
imap->in_progress_append = pcmdp;
imap->num_in_progress--;
if (cmdp->cb.cont || cmdp->cb.data)
imap->literal_pending = 0;
arg = next_arg( &cmd );
if (!strcmp( "OK", arg ))
resp = DRV_OK;
else {
if (!strcmp( "NO", arg )) {
if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp( cmd, "[TRYCREATE]", 11 ))) { /* SELECT, APPEND or UID COPY */
p = strchr( cmdp->cmd, '"' );
if (!issue_imap_cmd( ctx, 0, "CREATE %.*s", strchr( p + 1, '"' ) - p + 1, p )) {
resp = RESP_BAD;
goto normal;
}
/* not waiting here violates the spec, but a server that does not
grok this nonetheless violates it too. */
cmdp->cb.create = 0;
if (!(ncmdp = issue_imap_cmd( ctx, &cmdp->cb, "%s", cmdp->cmd ))) {
resp = RESP_BAD;
goto normal;
}
free( cmdp->cmd );
free( cmdp );
if (!tcmd)
return 0; /* ignored */
if (cmdp == tcmd)
tcmd = ncmdp;
continue;
}
resp = RESP_NO;
} else /*if (!strcmp( "BAD", arg ))*/
resp = RESP_BAD;
fprintf( stderr, "IMAP command '%s' returned an error: %s %s\n",
memcmp (cmdp->cmd, "LOGIN", 5) ?
cmdp->cmd : "LOGIN <user> <pass>",
arg, cmd ? cmd : "");
}
if ((resp2 = parse_response_code( ctx, &cmdp->cb, cmd )) > resp)
resp = resp2;
normal:
if (cmdp->cb.done)
cmdp->cb.done( ctx, cmdp, resp );
if (cmdp->cb.data)
free( cmdp->cb.data );
free( cmdp->cmd );
free( cmdp );
if (!tcmd || tcmd == cmdp)
return resp;
}
}
/* not reached */
}
static void
imap_close_server( imap_store_t *ictx )
{
imap_t *imap = ictx->imap;
if (imap->buf.sock.fd != -1) {
imap_exec( ictx, 0, "LOGOUT" );
close( imap->buf.sock.fd );
}
#ifdef HAVE_LIBSSL
if (imap->SSLContext)
SSL_CTX_free( imap->SSLContext );
#endif
free_list( imap->ns_personal );
free_list( imap->ns_other );
free_list( imap->ns_shared );
free( imap );
}
static void
imap_close_store( store_t *ctx )
{
imap_close_server( (imap_store_t *)ctx );
free_generic_messages( ctx->msgs );
free( ctx );
}
#ifdef HAVE_LIBSSL
static int
start_tls( imap_store_t *ctx )
{
imap_t *imap = ctx->imap;
int ret;
static int ssl_inited;
if (!ssl_inited) {
SSL_library_init();
SSL_load_error_strings();
ssl_inited = 1;
}
if (init_ssl_ctx( ctx ))
return 1;
imap->buf.sock.ssl = SSL_new( imap->SSLContext );
SSL_set_fd( imap->buf.sock.ssl, imap->buf.sock.fd );
if ((ret = SSL_connect( imap->buf.sock.ssl )) <= 0) {
socket_perror( "connect", &imap->buf.sock, ret );
return 1;
}
/* verify the server certificate */
if (verify_cert( imap->buf.sock.ssl ))
return 1;
imap->buf.sock.use_ssl = 1;
info( "Connection is now encrypted\n" );
return 0;
}
#define ENCODED_SIZE(n) (4*((n+2)/3))
static char
hexchar( unsigned int b )
{
if (b < 10)
return '0' + b;
return 'a' + (b - 10);
}
/* XXX merge into do_cram_auth? */
static char *
cram( const char *challenge, const char *user, const char *pass )
{
HMAC_CTX hmac;
char hash[16];
char hex[33];
int i;
unsigned int hashlen = sizeof(hash);
char buf[256];
int len = strlen( challenge );
char *response = nfcalloc( 1 + len );
char *final;
/* response will always be smaller than challenge because we are
* decoding.
*/
len = EVP_DecodeBlock( (unsigned char *)response, (unsigned char *)challenge, strlen( challenge ) );
HMAC_Init( &hmac, (unsigned char *) pass, strlen( pass ), EVP_md5() );
HMAC_Update( &hmac, (unsigned char *)response, strlen( response ) );
HMAC_Final( &hmac, (unsigned char *)hash, &hashlen );
assert( hashlen == sizeof(hash) );
free( response );
hex[32] = 0;
for (i = 0; i < 16; i++) {
hex[2 * i] = hexchar( (hash[i] >> 4) & 0xf );
hex[2 * i + 1] = hexchar( hash[i] & 0xf );
}
nfsnprintf( buf, sizeof(buf), "%s %s", user, hex );
len = strlen( buf );
len = ENCODED_SIZE( len ) + 1;
final = nfmalloc( len );
final[len - 1] = 0;
assert( EVP_EncodeBlock( (unsigned char *)final, (unsigned char *)buf, strlen( buf ) ) == len - 1 );
return final;
}
static int
do_cram_auth (imap_store_t *ctx, struct imap_cmd *cmdp, const char *prompt)
{
imap_t *imap = ctx->imap;
imap_server_conf_t *srvc = ((imap_store_conf_t *)ctx->gen.conf)->server;
char *resp;
int n, l;
resp = cram( prompt, srvc->user, srvc->pass );
if (Verbose)
printf( ">+> %s\n", resp );
l = strlen( resp );
n = socket_write( &imap->buf.sock, resp, l );
free( resp );
if (n != l)
return -1;
cmdp->cb.cont = 0;
return 0;
}
#endif
static store_t *
imap_open_store( store_conf_t *conf, store_t *oldctx )
{
imap_store_conf_t *cfg = (imap_store_conf_t *)conf;
imap_server_conf_t *srvc = cfg->server;
imap_store_t *ctx = (imap_store_t *)oldctx;
imap_t *imap;
char *arg, *rsp;
struct hostent *he;
struct sockaddr_in addr;
int s, a[2], preauth;
#if HAVE_LIBSSL
int use_ssl;
#endif
if (ctx) {
if (((imap_store_conf_t *)(ctx->gen.conf))->server == cfg->server) {
ctx->gen.conf = conf;
imap = ctx->imap;
goto final;
}
imap_close_server( ctx );
} else
ctx = nfcalloc( sizeof(*ctx) );
ctx->gen.conf = conf;
ctx->imap = imap = nfcalloc( sizeof(*imap) );
imap->buf.sock.fd = -1;
imap->in_progress_append = &imap->in_progress;
/* open connection to IMAP server */
#if HAVE_LIBSSL
use_ssl = 0;
#endif
if (srvc->tunnel) {
info( "Starting tunnel '%s'... ", srvc->tunnel );
if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
perror( "socketpair" );
exit( 1 );
}
if (fork() == 0) {
if (dup2( a[0], 0 ) == -1 || dup2( a[0], 1 ) == -1)
_exit( 127 );
close( a[0] );
close( a[1] );
execl( "/bin/sh", "sh", "-c", srvc->tunnel, (char *)0 );
_exit( 127 );
}
close (a[0]);
imap->buf.sock.fd = a[1];
info( "ok\n" );
} else {
memset( &addr, 0, sizeof(addr) );
addr.sin_port = htons( srvc->port ? srvc->port :
srvc->use_imaps ? 993 :
143 );
addr.sin_family = AF_INET;
info( "Resolving %s... ", srvc->host );
he = gethostbyname( srvc->host );
if (!he) {
perror( "gethostbyname" );
goto bail;
}
info( "ok\n" );
addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
s = socket( PF_INET, SOCK_STREAM, 0 );
info( "Connecting to %s:%hu... ", inet_ntoa( addr.sin_addr ), ntohs( addr.sin_port ) );
if (connect( s, (struct sockaddr *)&addr, sizeof(addr) )) {
close( s );
perror( "connect" );
goto bail;
}
info( "ok\n" );
imap->buf.sock.fd = s;
}
#if HAVE_LIBSSL
if (srvc->use_imaps) {
if (start_tls( ctx ))
goto bail;
use_ssl = 1;
}
#endif
/* read the greeting string */
if (buffer_gets( &imap->buf, &rsp )) {
fprintf( stderr, "IMAP error: no greeting response\n" );
goto bail;
}
arg = next_arg( &rsp );
if (!arg || *arg != '*' || (arg = next_arg( &rsp )) == NULL) {
fprintf( stderr, "IMAP error: invalid greeting response\n" );
goto bail;
}
preauth = 0;
if (!strcmp( "PREAUTH", arg ))
preauth = 1;
else if (strcmp( "OK", arg ) != 0) {
fprintf( stderr, "IMAP error: unknown greeting response\n" );
goto bail;
}
parse_response_code( ctx, 0, rsp );
if (!imap->caps && imap_exec( ctx, 0, "CAPABILITY" ) != RESP_OK)
goto bail;
if (!preauth) {
#if HAVE_LIBSSL
if (!srvc->use_imaps && (srvc->use_sslv2 || srvc->use_sslv3 || srvc->use_tlsv1)) {
/* always try to select SSL support if available */
if (CAP(STARTTLS)) {
if (imap_exec( ctx, 0, "STARTTLS" ) != RESP_OK)
goto bail;
if (start_tls( ctx ))
goto bail;
use_ssl = 1;
if (imap_exec( ctx, 0, "CAPABILITY" ) != RESP_OK)
goto bail;
} else {
if (srvc->require_ssl) {
fprintf( stderr, "IMAP error: SSL support not available\n" );
goto bail;
} else
warn( "IMAP warning: SSL support not available\n" );
}
}
#endif
info ("Logging in...\n");
if (!srvc->user) {
fprintf( stderr, "Skipping server %s, no user\n", srvc->host );
goto bail;
}
if (!srvc->pass) {
char prompt[80];
sprintf( prompt, "Password (%s@%s): ", srvc->user, srvc->host );
arg = getpass( prompt );
if (!arg) {
perror( "getpass" );
exit( 1 );
}
if (!*arg) {
fprintf( stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host );
goto bail;
}
/*
* getpass() returns a pointer to a static buffer. make a copy
* for long term storage.
*/
srvc->pass = nfstrdup( arg );
}
#if HAVE_LIBSSL
if (CAP(CRAM)) {
struct imap_cmd_cb cb;
info( "Authenticating with CRAM-MD5\n" );
memset( &cb, 0, sizeof(cb) );
cb.cont = do_cram_auth;
if (imap_exec( ctx, &cb, "AUTHENTICATE CRAM-MD5" ) != RESP_OK)
goto bail;
} else if (srvc->require_cram) {
fprintf( stderr, "IMAP error: CRAM-MD5 authentication is not supported by server\n" );
goto bail;
} else
#endif
{
if (CAP(NOLOGIN)) {
fprintf( stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host );
goto bail;
}
#if HAVE_LIBSSL
if (!use_ssl)
#endif
warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
if (imap_exec( ctx, 0, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass ) != RESP_OK) {
fprintf( stderr, "IMAP error: LOGIN failed\n" );
goto bail;
}
}
} /* !preauth */
final:
ctx->prefix = "";
if (*conf->path)
ctx->prefix = conf->path;
else if (cfg->use_namespace && CAP(NAMESPACE)) {
/* get NAMESPACE info */
if (imap_exec( ctx, 0, "NAMESPACE" ) != RESP_OK)
goto bail;
/* XXX for now assume personal namespace */
if (is_list( imap->ns_personal ) &&
is_list( imap->ns_personal->child ) &&
is_atom( imap->ns_personal->child->child ))
ctx->prefix = imap->ns_personal->child->child->val;
}
ctx->trashnc = 1;
return (store_t *)ctx;
bail:
imap_close_store( &ctx->gen );
return 0;
}
static void
imap_prepare( store_t *gctx, int opts )
{
free_generic_messages( gctx->msgs );
gctx->msgs = 0;
gctx->opts = opts;
}
static int
imap_select( store_t *gctx, int minuid, int maxuid, int *excs, int nexcs )
{
imap_store_t *ctx = (imap_store_t *)gctx;
imap_t *imap = ctx->imap;
const char *prefix;
int ret, i, j, bl;
struct imap_cmd_cb cb;
char buf[1000];
if (!strcmp( gctx->name, "INBOX" )) {
// imap->currentnc = 0;
prefix = "";
} else {
// imap->currentnc = 1; /* could use LIST results for that */
prefix = ctx->prefix;
}
memset( &cb, 0, sizeof(cb) );
cb.create = (gctx->opts & OPEN_CREATE) != 0;
cb.trycreate = 1;
if ((ret = imap_exec_b( ctx, &cb, "SELECT \"%s%s\"", prefix, gctx->name )) != DRV_OK)
goto bail;
if (gctx->count) {
imap->msgapp = &gctx->msgs;
sort_ints( excs, nexcs );
for (i = 0; i < nexcs; ) {
for (bl = 0; i < nexcs && bl < 960; i++) {
if (bl)
buf[bl++] = ',';
bl += sprintf( buf + bl, "%d", excs[i] );
j = i;
for (; i + 1 < nexcs && excs[i + 1] == excs[i] + 1; i++);
if (i != j)
bl += sprintf( buf + bl, ":%d", excs[i] );
}
if ((ret = imap_exec_b( ctx, 0, "UID FETCH %s (UID%s%s)", buf,
(gctx->opts & OPEN_FLAGS) ? " FLAGS" : "",
(gctx->opts & OPEN_SIZE) ? " RFC822.SIZE" : "" )) != DRV_OK)
goto bail;
}
if (maxuid == INT_MAX)
maxuid = imap->uidnext ? imap->uidnext - 1 : 1000000000;
if (maxuid >= minuid &&
(ret = imap_exec_b( ctx, 0, "UID FETCH %d:%d (UID%s%s)", minuid, maxuid,
(gctx->opts & OPEN_FLAGS) ? " FLAGS" : "",
(gctx->opts & OPEN_SIZE) ? " RFC822.SIZE" : "" )) != DRV_OK)
goto bail;
}
ret = DRV_OK;
bail:
if (excs)
free( excs );
return ret;
}
static int
imap_fetch_msg( store_t *ctx, message_t *msg, msg_data_t *data )
{
struct imap_cmd_cb cb;
memset( &cb, 0, sizeof(cb) );
cb.uid = msg->uid;
cb.ctx = data;
return imap_exec_m( (imap_store_t *)ctx, &cb, "UID FETCH %d (%sBODY.PEEK[])",
msg->uid, (msg->status & M_FLAGS) ? "" : "FLAGS " );
}
static int
imap_make_flags( int flags, char *buf )
{
const char *s;
unsigned i, d;
for (i = d = 0; i < as(Flags); i++)
if (flags & (1 << i)) {
buf[d++] = ' ';
buf[d++] = '\\';
for (s = Flags[i]; *s; s++)
buf[d++] = *s;
}
buf[0] = '(';
buf[d++] = ')';
return d;
}
static int
imap_flags_helper( imap_store_t *ctx, int uid, char what, int flags)
{
char buf[256];
buf[imap_make_flags( flags, buf )] = 0;
return issue_imap_cmd_w( ctx, 0, "UID STORE %d %cFLAGS.SILENT %s", uid, what, buf ) ? DRV_OK : DRV_STORE_BAD;
}
static int
imap_set_flags( store_t *gctx, message_t *msg, int uid, int add, int del )
{
imap_store_t *ctx = (imap_store_t *)gctx;
int ret;
if (msg) {
uid = msg->uid;
add &= ~msg->flags;
del &= msg->flags;
msg->flags |= add;
msg->flags &= ~del;
}
if ((!add || (ret = imap_flags_helper( ctx, uid, '+', add )) == DRV_OK) &&
(!del || (ret = imap_flags_helper( ctx, uid, '-', del )) == DRV_OK))
return DRV_OK;
return ret;
}
static int
imap_close( store_t *ctx )
{
return imap_exec_b( (imap_store_t *)ctx, 0, "CLOSE" );
}
static int
imap_trash_msg( store_t *gctx, message_t *msg )
{
imap_store_t *ctx = (imap_store_t *)gctx;
struct imap_cmd_cb cb;
memset( &cb, 0, sizeof(cb) );
cb.create = 1;
return imap_exec_m( ctx, &cb, "UID COPY %d \"%s%s\"",
msg->uid, ctx->prefix, gctx->conf->trash );
}
#define TUIDL 8
static int
imap_store_msg( store_t *gctx, msg_data_t *data, int *uid )
{
imap_store_t *ctx = (imap_store_t *)gctx;
imap_t *imap = ctx->imap;
struct imap_cmd_cb cb;
char *fmap, *buf;
const char *prefix, *box;
int ret, i, j, d, len, extra, nocr;
int start, sbreak = 0, ebreak = 0;
char flagstr[128], tuid[TUIDL * 2 + 1];
memset( &cb, 0, sizeof(cb) );
fmap = data->data;
len = data->len;
nocr = !data->crlf;
extra = 0, i = 0;
if (!CAP(UIDPLUS) && uid) {
nloop:
start = i;
while (i < len)
if (fmap[i++] == '\n') {
extra += nocr;
if (i - 2 + nocr == start) {
sbreak = ebreak = i - 2 + nocr;
goto mktid;
}
if (!memcmp( fmap + start, "X-TUID: ", 8 )) {
extra -= (ebreak = i) - (sbreak = start) + nocr;
goto mktid;
}
goto nloop;
}
/* invalid message */
free( fmap );
return DRV_MSG_BAD;
mktid:
for (j = 0; j < TUIDL; j++)
sprintf( tuid + j * 2, "%02x", arc4_getbyte() );
extra += 8 + TUIDL * 2 + 2;
}
if (nocr)
for (; i < len; i++)
if (fmap[i] == '\n')
extra++;
cb.dlen = len + extra;
buf = cb.data = nfmalloc( cb.dlen );
i = 0;
if (!CAP(UIDPLUS) && uid) {
if (nocr) {
for (; i < sbreak; i++)
if (fmap[i] == '\n') {
*buf++ = '\r';
*buf++ = '\n';
} else
*buf++ = fmap[i];
} else {
memcpy( buf, fmap, sbreak );
buf += sbreak;
}
memcpy( buf, "X-TUID: ", 8 );
buf += 8;
memcpy( buf, tuid, TUIDL * 2 );
buf += TUIDL * 2;
*buf++ = '\r';
*buf++ = '\n';
i = ebreak;
}
if (nocr) {
for (; i < len; i++)
if (fmap[i] == '\n') {
*buf++ = '\r';
*buf++ = '\n';
} else
*buf++ = fmap[i];
} else
memcpy( buf, fmap + i, len - i );
free( fmap );
d = 0;
if (data->flags) {
d = imap_make_flags( data->flags, flagstr );
flagstr[d++] = ' ';
}
flagstr[d] = 0;
if (!uid) {
box = gctx->conf->trash;
prefix = ctx->prefix;
cb.create = 1;
if (ctx->trashnc)
imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
} else {
box = gctx->name;
prefix = !strcmp( box, "INBOX" ) ? "" : ctx->prefix;
cb.create = (gctx->opts & OPEN_CREATE) != 0;
/*if (ctx->currentnc)
imap->caps = imap->rcaps & ~(1 << LITERALPLUS);*/
}
cb.ctx = uid;
ret = imap_exec_m( ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr );
imap->caps = imap->rcaps;
if (ret != DRV_OK)
return ret;
if (!uid)
ctx->trashnc = 0;
else {
/*ctx->currentnc = 0;*/
gctx->count++;
}
if (CAP(UIDPLUS) || !uid)
return DRV_OK;
/* Didn't receive an APPENDUID */
cb.uid = -1; /* we're looking for a UID */
cb.data = 0; /* reset; ctx still set */
return imap_exec_m( ctx, &cb, "UID SEARCH HEADER X-TUID %s", tuid );
}
static int
imap_list( store_t *gctx, string_list_t **retb )
{
imap_store_t *ctx = (imap_store_t *)gctx;
imap_t *imap = ctx->imap;
int ret;
imap->boxes = 0;
if ((ret = imap_exec_b( ctx, 0, "LIST \"\" \"%s%%\"", ctx->prefix )) != DRV_OK)
return ret;
*retb = imap->boxes;
return DRV_OK;
}
static int
imap_check( store_t *gctx )
{
(void) gctx;
/* flush queue here */
return DRV_OK;
}
imap_server_conf_t *servers, **serverapp = &servers;
static int
imap_parse_store( conffile_t *cfg, store_conf_t **storep, int *err )
{
imap_store_conf_t *store;
imap_server_conf_t *server, *srv, sserver;
int acc_opt = 0;
if (!strcasecmp( "IMAPAccount", cfg->cmd )) {
server = nfcalloc( sizeof(*server) );
server->name = nfstrdup( cfg->val );
*serverapp = server;
serverapp = &server->next;
store = 0;
} else if (!strcasecmp( "IMAPStore", cfg->cmd )) {
store = nfcalloc( sizeof(*store) );
store->gen.driver = &imap_driver;
store->gen.name = nfstrdup( cfg->val );
store->use_namespace = 1;
*storep = &store->gen;
memset( &sserver, 0, sizeof(sserver) );
server = &sserver;
} else
return 0;
#if HAVE_LIBSSL
/* this will probably annoy people, but its the best default just in
* case people forget to turn it on
*/
server->require_ssl = 1;
server->use_tlsv1 = 1;
#endif
while (getcline( cfg ) && cfg->cmd) {
if (!strcasecmp( "Host", cfg->cmd )) {
/* The imap[s]: syntax is just a backwards compat hack. */
#if HAVE_LIBSSL
if (!memcmp( "imaps:", cfg->val, 6 )) {
cfg->val += 6;
server->use_imaps = 1;
server->use_sslv2 = 1;
server->use_sslv3 = 1;
} else
#endif
{
if (!memcmp( "imap:", cfg->val, 5 ))
cfg->val += 5;
}
if (!memcmp( "//", cfg->val, 2 ))
cfg->val += 2;
server->host = nfstrdup( cfg->val );
}
else if (!strcasecmp( "User", cfg->cmd ))
server->user = nfstrdup( cfg->val );
else if (!strcasecmp( "Pass", cfg->cmd ))
server->pass = nfstrdup( cfg->val );
else if (!strcasecmp( "Port", cfg->cmd ))
server->port = parse_int( cfg );
#if HAVE_LIBSSL
else if (!strcasecmp( "CertificateFile", cfg->cmd )) {
server->cert_file = expand_strdup( cfg->val );
if (access( server->cert_file, R_OK )) {
fprintf( stderr, "%s:%d: CertificateFile '%s': %s\n",
cfg->file, cfg->line, server->cert_file, strerror( errno ) );
*err = 1;
}
} else if (!strcasecmp( "RequireSSL", cfg->cmd ))
server->require_ssl = parse_bool( cfg );
else if (!strcasecmp( "UseIMAPS", cfg->cmd ))
server->use_imaps = parse_bool( cfg );
else if (!strcasecmp( "UseSSLv2", cfg->cmd ))
server->use_sslv2 = parse_bool( cfg );
else if (!strcasecmp( "UseSSLv3", cfg->cmd ))
server->use_sslv3 = parse_bool( cfg );
else if (!strcasecmp( "UseTLSv1", cfg->cmd ))
server->use_tlsv1 = parse_bool( cfg );
else if (!strcasecmp( "RequireCRAM", cfg->cmd ))
server->require_cram = parse_bool( cfg );
#endif
else if (!strcasecmp( "Tunnel", cfg->cmd ))
server->tunnel = nfstrdup( cfg->val );
else if (store) {
if (!strcasecmp( "Account", cfg->cmd )) {
for (srv = servers; srv; srv = srv->next)
if (srv->name && !strcmp( srv->name, cfg->val ))
goto gotsrv;
fprintf( stderr, "%s:%d: unknown IMAP account '%s'\n",
cfg->file, cfg->line, cfg->val );
*err = 1;
continue;
gotsrv:
store->server = srv;
} else if (!strcasecmp( "UseNamespace", cfg->cmd ))
store->use_namespace = parse_bool( cfg );
else if (!strcasecmp( "Path", cfg->cmd ))
store->gen.path = nfstrdup( cfg->val );
else
parse_generic_store( &store->gen, cfg, err );
continue;
} else {
fprintf( stderr, "%s:%d: unknown/misplaced keyword '%s'\n",
cfg->file, cfg->line, cfg->cmd );
*err = 1;
continue;
}
acc_opt = 1;
}
if (!store || !store->server) {
if (!server->tunnel && !server->host) {
if (store)
fprintf( stderr, "IMAP store '%s' has incomplete/missing connection details\n", store->gen.name );
else
fprintf( stderr, "IMAP account '%s' has incomplete/missing connection details\n", server->name );
*err = 1;
return 1;
}
}
if (store) {
if (!store->server) {
store->server = nfmalloc( sizeof(sserver) );
memcpy( store->server, &sserver, sizeof(sserver) );
} else if (acc_opt) {
fprintf( stderr, "IMAP store '%s' has both Account and account-specific options\n", store->gen.name );
*err = 1;
}
}
return 1;
}
struct driver imap_driver = {
imap_parse_store,
imap_open_store,
imap_close_store,
imap_list,
imap_prepare,
imap_select,
imap_fetch_msg,
imap_store_msg,
imap_set_flags,
imap_trash_msg,
imap_check,
imap_close
};
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