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git/imap-send.c

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/*
* git-imap-send - drops patches into an imap Drafts folder
* derived from isync/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>
* Copyright (C) 2006 Mike McCormack
*
* 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
*/
#include "cache.h"
#ifdef NO_OPENSSL
typedef void *SSL;
#endif
struct store_conf {
char *name;
const char *path; /* should this be here? its interpretation is driver-specific */
char *map_inbox;
char *trash;
unsigned max_size; /* off_t is overkill */
unsigned trash_remote_new:1, trash_only_new:1;
};
struct string_list {
struct string_list *next;
char string[1];
};
struct channel_conf {
struct channel_conf *next;
char *name;
struct store_conf *master, *slave;
char *master_name, *slave_name;
char *sync_state;
struct string_list *patterns;
int mops, sops;
unsigned max_messages; /* for slave only */
};
struct group_conf {
struct group_conf *next;
char *name;
struct string_list *channels;
};
/* For message->status */
#define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
#define M_DEAD (1<<1) /* expunged */
#define M_FLAGS (1<<2) /* flags fetched */
struct message {
struct message *next;
/* struct string_list *keywords; */
size_t size; /* zero implies "not fetched" */
int uid;
unsigned char flags, status;
};
struct store {
struct store_conf *conf; /* foreign */
/* currently open mailbox */
const char *name; /* foreign! maybe preset? */
char *path; /* own */
struct message *msgs; /* own */
int uidvalidity;
unsigned char opts; /* maybe preset? */
/* note that the following do _not_ reflect stats from msgs, but mailbox totals */
int count; /* # of messages */
int recent; /* # of recent messages - don't trust this beyond the initial read */
};
struct msg_data {
char *data;
int len;
unsigned char flags;
unsigned int crlf:1;
};
#define DRV_OK 0
#define DRV_MSG_BAD -1
#define DRV_BOX_BAD -2
#define DRV_STORE_BAD -3
static int Verbose, Quiet;
static void imap_info(const char *, ...);
static void imap_warn(const char *, ...);
static char *next_arg(char **);
static void free_generic_messages(struct message *);
static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
static int nfvasprintf(char **strp, const char *fmt, va_list ap)
{
int len;
char tmp[8192];
len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
if (len < 0)
die("Fatal: Out of memory");
if (len >= sizeof(tmp))
die("imap command overflow!");
*strp = xmemdupz(tmp, len);
return len;
}
static void arc4_init(void);
static unsigned char arc4_getbyte(void);
struct imap_server_conf {
char *name;
char *tunnel;
char *host;
int port;
char *user;
char *pass;
int use_ssl;
int ssl_verify;
};
struct imap_store_conf {
struct store_conf gen;
struct imap_server_conf *server;
unsigned use_namespace:1;
};
#define NIL (void *)0x1
#define LIST (void *)0x2
struct imap_list {
struct imap_list *next, *child;
char *val;
int len;
};
struct imap_socket {
int fd;
SSL *ssl;
};
struct imap_buffer {
struct imap_socket sock;
int bytes;
int offset;
char buf[1024];
};
struct imap_cmd;
struct imap {
int uidnext; /* from SELECT responses */
struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
unsigned caps, rcaps; /* CAPABILITY results */
/* command queue */
int nexttag, num_in_progress, literal_pending;
struct imap_cmd *in_progress, **in_progress_append;
struct imap_buffer buf; /* this is BIG, so put it last */
};
struct imap_store {
struct store gen;
int uidvalidity;
struct imap *imap;
const char *prefix;
unsigned /*currentnc:1,*/ trashnc:1;
};
struct imap_cmd_cb {
int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
void (*done)(struct imap_store *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,
STARTTLS,
};
static const char *cap_list[] = {
"LOGINDISABLED",
"UIDPLUS",
"LITERAL+",
"NAMESPACE",
"STARTTLS",
};
#define RESP_OK 0
#define RESP_NO 1
#define RESP_BAD 2
static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
static const char *Flags[] = {
"Draft",
"Flagged",
"Answered",
"Seen",
"Deleted",
};
#ifndef NO_OPENSSL
static void ssl_socket_perror(const char *func)
{
fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), 0));
}
#endif
static void socket_perror(const char *func, struct imap_socket *sock, int ret)
{
#ifndef NO_OPENSSL
if (sock->ssl) {
int sslerr = SSL_get_error(sock->ssl, ret);
switch (sslerr) {
case SSL_ERROR_NONE:
break;
case SSL_ERROR_SYSCALL:
perror("SSL_connect");
break;
default:
ssl_socket_perror("SSL_connect");
break;
}
} else
#endif
{
if (ret < 0)
perror(func);
else
fprintf(stderr, "%s: unexpected EOF\n", func);
}
}
static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
{
#ifdef NO_OPENSSL
fprintf(stderr, "SSL requested but SSL support not compiled in\n");
return -1;
#else
SSL_METHOD *meth;
SSL_CTX *ctx;
int ret;
SSL_library_init();
SSL_load_error_strings();
if (use_tls_only)
meth = TLSv1_method();
else
meth = SSLv23_method();
if (!meth) {
ssl_socket_perror("SSLv23_method");
return -1;
}
ctx = SSL_CTX_new(meth);
if (verify)
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
if (!SSL_CTX_set_default_verify_paths(ctx)) {
ssl_socket_perror("SSL_CTX_set_default_verify_paths");
return -1;
}
sock->ssl = SSL_new(ctx);
if (!sock->ssl) {
ssl_socket_perror("SSL_new");
return -1;
}
if (!SSL_set_fd(sock->ssl, sock->fd)) {
ssl_socket_perror("SSL_set_fd");
return -1;
}
ret = SSL_connect(sock->ssl);
if (ret <= 0) {
socket_perror("SSL_connect", sock, ret);
return -1;
}
return 0;
#endif
}
static int socket_read(struct imap_socket *sock, char *buf, int len)
{
ssize_t n;
#ifndef NO_OPENSSL
if (sock->ssl)
n = SSL_read(sock->ssl, buf, len);
else
#endif
n = xread(sock->fd, buf, len);
if (n <= 0) {
socket_perror("read", sock, n);
close(sock->fd);
sock->fd = -1;
}
return n;
}
static int socket_write(struct imap_socket *sock, const char *buf, int len)
{
int n;
#ifndef NO_OPENSSL
if (sock->ssl)
n = SSL_write(sock->ssl, buf, len);
else
#endif
n = write_in_full(sock->fd, buf, len);
if (n != len) {
socket_perror("write", sock, n);
close(sock->fd);
sock->fd = -1;
}
return n;
}
static void socket_shutdown(struct imap_socket *sock)
{
#ifndef NO_OPENSSL
if (sock->ssl) {
SSL_shutdown(sock->ssl);
SSL_free(sock->ssl);
}
#endif
close(sock->fd);
}
/* simple line buffering */
static int buffer_gets(struct imap_buffer *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)
memmove(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 void imap_info(const char *msg, ...)
{
va_list va;
if (!Quiet) {
va_start(va, msg);
vprintf(msg, va);
va_end(va);
fflush(stdout);
}
}
static void imap_warn(const char *msg, ...)
{
va_list va;
if (Quiet < 2) {
va_start(va, msg);
vfprintf(stderr, msg, va);
va_end(va);
}
}
static char *next_arg(char **s)
{
char *ret;
if (!s || !*s)
return NULL;
while (isspace((unsigned char) **s))
(*s)++;
if (!**s) {
*s = NULL;
return NULL;
}
if (**s == '"') {
++*s;
ret = *s;
*s = strchr(*s, '"');
} else {
ret = *s;
while (**s && !isspace((unsigned char) **s))
(*s)++;
}
if (*s) {
if (**s)
*(*s)++ = 0;
if (!**s)
*s = NULL;
}
return ret;
}
static void free_generic_messages(struct message *msgs)
{
struct message *tmsg;
for (; msgs; msgs = tmsg) {
tmsg = msgs->next;
free(msgs);
}
}
static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
{
int ret;
va_list va;
va_start(va, fmt);
if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
die("Fatal: buffer too small. Please report a bug.");
va_end(va);
return ret;
}
static struct {
unsigned char i, j, s[256];
} rs;
static void arc4_init(void)
{
int i, fd;
unsigned char j, si, dat[128];
if ((fd = open("/dev/urandom", O_RDONLY)) < 0 && (fd = open("/dev/random", O_RDONLY)) < 0) {
fprintf(stderr, "Fatal: no random number source available.\n");
exit(3);
}
if (read_in_full(fd, dat, 128) != 128) {
fprintf(stderr, "Fatal: cannot read random number source.\n");
exit(3);
}
close(fd);
for (i = 0; i < 256; i++)
rs.s[i] = i;
for (i = j = 0; i < 256; i++) {
si = rs.s[i];
j += si + dat[i & 127];
rs.s[i] = rs.s[j];
rs.s[j] = si;
}
rs.i = rs.j = 0;
for (i = 0; i < 256; i++)
arc4_getbyte();
}
static unsigned char arc4_getbyte(void)
{
unsigned char si, sj;
rs.i++;
si = rs.s[rs.i];
rs.j += si;
sj = rs.s[rs.j];
rs.s[rs.i] = sj;
rs.s[rs.j] = si;
return rs.s[(si + sj) & 0xff];
}
static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
struct imap_cmd_cb *cb,
const char *fmt, va_list ap)
{
struct imap *imap = ctx->imap;
struct imap_cmd *cmd;
int n, bufl;
char buf[1024];
cmd = xmalloc(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, NULL);
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)
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 = NULL;
} else
imap->literal_pending = 1;
} else if (cmd->cb.cont)
imap->literal_pending = 1;
cmd->next = NULL;
*imap->in_progress_append = cmd;
imap->in_progress_append = &cmd->next;
imap->num_in_progress++;
return cmd;
}
static struct imap_cmd *issue_imap_cmd(struct imap_store *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 int imap_exec(struct imap_store *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_m(struct imap_store *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 int is_atom(struct imap_list *list)
{
return list && list->val && list->val != NIL && list->val != LIST;
}
static int is_list(struct imap_list *list)
{
return list && list->val == LIST;
}
static void free_list(struct imap_list *list)
{
struct imap_list *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(struct imap *imap, char **sp, struct imap_list **curp, int level)
{
struct imap_list *cur;
char *s = *sp, *p;
int n, bytes;
for (;;) {
while (isspace((unsigned char)*s))
s++;
if (level && *s == ')') {
s++;
break;
}
*curp = cur = xmalloc(sizeof(*cur));
curp = &cur->next;
cur->val = NULL; /* 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 = xmalloc(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 = xmemdupz(p, cur->len);
} 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 = xmemdupz(p, cur->len);
}
if (!level)
break;
if (!*s)
goto bail;
}
*sp = s;
*curp = NULL;
return 0;
bail:
*curp = NULL;
return -1;
}
static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
{
struct imap_list *head;
if (!parse_imap_list_l(imap, sp, &head, 0))
return head;
free_list(head);
return NULL;
}
static struct imap_list *parse_list(char **sp)
{
return parse_imap_list(NULL, sp);
}
static void parse_capability(struct imap *imap, char *cmd)
{
char *arg;
unsigned i;
imap->caps = 0x80000000;
while ((arg = next_arg(&cmd)))
for (i = 0; i < ARRAY_SIZE(cap_list); i++)
if (!strcmp(cap_list[i], arg))
imap->caps |= 1 << i;
imap->rcaps = imap->caps;
}
static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
char *s)
{
struct imap *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 int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
{
struct imap *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, NULL, cmd)) != RESP_OK)
return resp;
} else if (!strcmp("CAPABILITY", arg))
parse_capability(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 {
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 = NULL;
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, NULL, "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 response (%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);
free(cmdp->cb.data);
free(cmdp->cmd);
free(cmdp);
if (!tcmd || tcmd == cmdp)
return resp;
}
}
/* not reached */
}
static void imap_close_server(struct imap_store *ictx)
{
struct imap *imap = ictx->imap;
if (imap->buf.sock.fd != -1) {
imap_exec(ictx, NULL, "LOGOUT");
socket_shutdown(&imap->buf.sock);
}
free_list(imap->ns_personal);
free_list(imap->ns_other);
free_list(imap->ns_shared);
free(imap);
}
static void imap_close_store(struct store *ctx)
{
imap_close_server((struct imap_store *)ctx);
free_generic_messages(ctx->msgs);
free(ctx);
}
static struct store *imap_open_store(struct imap_server_conf *srvc)
{
struct imap_store *ctx;
struct imap *imap;
char *arg, *rsp;
struct hostent *he;
struct sockaddr_in addr;
int s, a[2], preauth;
pid_t pid;
ctx = xcalloc(sizeof(*ctx), 1);
ctx->imap = imap = xcalloc(sizeof(*imap), 1);
imap->buf.sock.fd = -1;
imap->in_progress_append = &imap->in_progress;
/* open connection to IMAP server */
if (srvc->tunnel) {
imap_info("Starting tunnel '%s'... ", srvc->tunnel);
if (socketpair(PF_UNIX, SOCK_STREAM, 0, a)) {
perror("socketpair");
exit(1);
}
pid = fork();
if (pid < 0)
_exit(127);
if (!pid) {
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, NULL);
_exit(127);
}
close(a[0]);
imap->buf.sock.fd = a[1];
imap_info("ok\n");
} else {
memset(&addr, 0, sizeof(addr));
addr.sin_port = htons(srvc->port);
addr.sin_family = AF_INET;
imap_info("Resolving %s... ", srvc->host);
he = gethostbyname(srvc->host);
if (!he) {
perror("gethostbyname");
goto bail;
}
imap_info("ok\n");
addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
s = socket(PF_INET, SOCK_STREAM, 0);
imap_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;
}
imap->buf.sock.fd = s;
if (srvc->use_ssl &&
ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
close(s);
goto bail;
}
imap_info("ok\n");
}
/* 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, NULL, rsp);
if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
goto bail;
if (!preauth) {
#ifndef NO_OPENSSL
if (!srvc->use_ssl && CAP(STARTTLS)) {
if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
goto bail;
if (ssl_socket_connect(&imap->buf.sock, 1,
srvc->ssl_verify))
goto bail;
/* capabilities may have changed, so get the new capabilities */
if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
goto bail;
}
#endif
imap_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 = xstrdup(arg);
}
if (CAP(NOLOGIN)) {
fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
goto bail;
}
if (!imap->buf.sock.ssl)
imap_warn("*** IMAP Warning *** Password is being "
"sent in the clear\n");
if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
fprintf(stderr, "IMAP error: LOGIN failed\n");
goto bail;
}
} /* !preauth */
ctx->prefix = "";
ctx->trashnc = 1;
return (struct store *)ctx;
bail:
imap_close_store(&ctx->gen);
return NULL;
}
static int imap_make_flags(int flags, char *buf)
{
const char *s;
unsigned i, d;
for (i = d = 0; i < ARRAY_SIZE(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;
}
#define TUIDL 8
static int imap_store_msg(struct store *gctx, struct msg_data *data, int *uid)
{
struct imap_store *ctx = (struct imap_store *)gctx;
struct imap *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 = xmalloc(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 = 0;
}
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
gctx->count++;
return DRV_OK;
}
#define CHUNKSIZE 0x1000
static int read_message(FILE *f, struct msg_data *msg)
{
struct strbuf buf = STRBUF_INIT;
memset(msg, 0, sizeof(*msg));
do {
if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
break;
} while (!feof(f));
msg->len = buf.len;
msg->data = strbuf_detach(&buf, NULL);
return msg->len;
}
static int count_messages(struct msg_data *msg)
{
int count = 0;
char *p = msg->data;
while (1) {
if (!prefixcmp(p, "From ")) {
count++;
p += 5;
}
p = strstr(p+5, "\nFrom ");
if (!p)
break;
p++;
}
return count;
}
static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
{
char *p, *data;
memset(msg, 0, sizeof *msg);
if (*ofs >= all_msgs->len)
return 0;
data = &all_msgs->data[*ofs];
msg->len = all_msgs->len - *ofs;
if (msg->len < 5 || prefixcmp(data, "From "))
return 0;
p = strchr(data, '\n');
if (p) {
p = &p[1];
msg->len -= p-data;
*ofs += p-data;
data = p;
}
p = strstr(data, "\nFrom ");
if (p)
msg->len = &p[1] - data;
msg->data = xmemdupz(data, msg->len);
*ofs += msg->len;
return 1;
}
static struct imap_server_conf server = {
NULL, /* name */
NULL, /* tunnel */
NULL, /* host */
0, /* port */
NULL, /* user */
NULL, /* pass */
0, /* use_ssl */
1, /* ssl_verify */
};
static char *imap_folder;
static int git_imap_config(const char *key, const char *val, void *cb)
{
char imap_key[] = "imap.";
if (strncmp(key, imap_key, sizeof imap_key - 1))
return 0;
if (!val)
return config_error_nonbool(key);
key += sizeof imap_key - 1;
if (!strcmp("folder", key)) {
imap_folder = xstrdup(val);
} else if (!strcmp("host", key)) {
if (!prefixcmp(val, "imap:"))
val += 5;
else if (!prefixcmp(val, "imaps:")) {
val += 6;
server.use_ssl = 1;
}
if (!prefixcmp(val, "//"))
val += 2;
server.host = xstrdup(val);
} else if (!strcmp("user", key))
server.user = xstrdup(val);
else if (!strcmp("pass", key))
server.pass = xstrdup(val);
else if (!strcmp("port", key))
server.port = git_config_int(key, val);
else if (!strcmp("tunnel", key))
server.tunnel = xstrdup(val);
else if (!strcmp("sslverify", key))
server.ssl_verify = git_config_bool(key, val);
return 0;
}
int main(int argc, char **argv)
{
struct msg_data all_msgs, msg;
struct store *ctx = NULL;
int uid = 0;
int ofs = 0;
int r;
int total, n = 0;
int nongit_ok;
/* init the random number generator */
arc4_init();
setup_git_directory_gently(&nongit_ok);
git_config(git_imap_config, NULL);
if (!server.port)
server.port = server.use_ssl ? 993 : 143;
if (!imap_folder) {
fprintf(stderr, "no imap store specified\n");
return 1;
}
if (!server.host) {
if (!server.tunnel) {
fprintf(stderr, "no imap host specified\n");
return 1;
}
server.host = "tunnel";
}
/* read the messages */
if (!read_message(stdin, &all_msgs)) {
fprintf(stderr, "nothing to send\n");
return 1;
}
total = count_messages(&all_msgs);
if (!total) {
fprintf(stderr, "no messages to send\n");
return 1;
}
/* write it to the imap server */
ctx = imap_open_store(&server);
if (!ctx) {
fprintf(stderr, "failed to open store\n");
return 1;
}
fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
ctx->name = imap_folder;
while (1) {
unsigned percent = n * 100 / total;
fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
if (!split_msg(&all_msgs, &msg, &ofs))
break;
r = imap_store_msg(ctx, &msg, &uid);
if (r != DRV_OK)
break;
n++;
}
fprintf(stderr, "\n");
imap_close_store(ctx);
return 0;
}