mirror of
https://github.com/sheumann/hush.git
synced 2024-12-26 10:32:02 +00:00
sendmail: update from maintainer
This commit is contained in:
Denis Vlasenko
parent
7be1030dcc
commit
17db1a9ac1
@ -1026,17 +1026,19 @@ USE_FEATURE_BRCTL_FANCY("\n" \
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" -v Give fdisk version"
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#define fetchmail_trivial_usage \
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"[-C dir] [-w timeout] [-U user] -P password [-X] [-t] [-z] server[:port]"
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"[-w timeout] [-U user] -P password [-X] [-t] [-z] server[:port] maildir [prog]"
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#define fetchmail_full_usage \
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"Fetch content of remote mailbox to local Maildir." \
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"\n\nOptions:\n" \
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" -C dir Set Maildir location\n" \
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" -w timeout Set timeout on network operations\n" \
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" -U username Authenticate with specified username\n" \
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" -P password Authenticate with specified password\n" \
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" -X Use openssl connection helper for secured servers\n" \
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" -t Get only headers\n" \
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" -z Delete messages on server"
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" -z Delete messages on server" \
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USE_FEATURE_FETCHMAIL_FILTER("\n" \
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" prog Run prog <message file> on message delivery" \
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)
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#define findfs_trivial_usage \
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"LABEL=label or UUID=uuid"
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@ -3258,18 +3260,16 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
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#define selinuxenabled_full_usage
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#define sendmail_trivial_usage \
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"[-C dir] [-w timeout] [-U user] [-P password] [-X]\n" \
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"-t to [-t to] -f from [-n] [-s subject] [-c charset] server[:port] [body] [attachment ...]"
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"[-w timeout] [-U user] [-P password] [-X]\n" \
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"-t to [-t to]... [-n] [-s subject] [-c charset] server[:port] from [body] [attachment ...]"
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#define sendmail_full_usage \
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"Send an email with optional attachments." \
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"\n\nOptions:\n" \
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" -C dir Change current directory to dir\n" \
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" -w timeout Set timeout on network operations\n" \
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" -U username Authenticate with specified username\n" \
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" -P password Authenticate with specified password\n" \
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" -t address Recipient(s). May be multiple\n" \
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" -X Use openssl connection helper for secured servers\n" \
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" -t to Recipient email. May be multiple\n" \
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" -f from Sender address\n" \
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" -n Request delivery notification to sender\n" \
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" -s subject Subject\n" \
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" -c charset Assumed charset for body and subject [utf-8]"
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@ -27,9 +27,13 @@ static void uuencode(char *fname, const char *text)
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if (NOT_LONE_DASH(fname))
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fd = xopen(fname, O_RDONLY);
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src_buf = bb_common_bufsiz1;
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} else {
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// N.B. strlen(NULL) segfaults!
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} else if (text) {
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// though we do not call uuencode(NULL, NULL) explicitly
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// still we do not want to break things suddenly
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len = strlen(text);
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}
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} else
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return;
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fflush(stdout); // sync stdio and unistd output
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while (1) {
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@ -59,7 +63,38 @@ static void uuencode(char *fname, const char *text)
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close(fd);
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}
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static pid_t helper_pid;
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static const char *const init_xargs[9] = {
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"openssl", "s_client", "-quiet", "-connect",
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NULL, "-tls1", "-starttls", "smtp"
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};
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struct globals {
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pid_t helper_pid;
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unsigned timeout;
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// arguments for SSL connection helper
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const char *xargs[9];
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#if ENABLE_FEATURE_FETCHMAIL_FILTER
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// arguments for postprocess helper
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const char *fargs[3];
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#endif
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};
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#define G (*ptr_to_globals)
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#define helper_pid (G.helper_pid)
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#define timeout (G.timeout )
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#define xargs (G.xargs )
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#define fargs (G.fargs )
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#define INIT_G() do { \
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PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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memcpy(xargs, init_xargs, sizeof(init_xargs)); \
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fargs[0] = "utf-8"; \
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} while (0)
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#define opt_connect (xargs[4])
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#define opt_after_connect (xargs[5])
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#if ENABLE_FEATURE_FETCHMAIL_FILTER
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#define opt_charset (fargs[0])
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#define opt_subject (fargs[1])
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#endif
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static void kill_helper(void)
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{
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@ -71,7 +106,7 @@ static void kill_helper(void)
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// generic signal handler
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static void signal_handler(int signo)
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{
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int err;
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#define err signo
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if (SIGALRM == signo) {
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kill_helper();
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@ -107,20 +142,19 @@ static void launch_helper(const char **argv)
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close(pipes[i]);
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if (!helper_pid) {
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// child - try to execute connection helper
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BB_EXECVP(argv[0], (char **)argv);
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// close(STDERR_FILENO);
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BB_EXECVP(*argv, (char **)argv);
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_exit(127);
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}
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// parent - check whether child is alive
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bb_signals_recursive(0
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+ (1 << SIGCHLD)
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+ (1 << SIGALRM)
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, signal_handler);
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bb_signals(0
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+ (1 << SIGCHLD)
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+ (1 << SIGALRM)
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, signal_handler);
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signal_handler(SIGCHLD);
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// child seems OK -> parent goes on
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}
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static unsigned timeout;
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static char *command(const char *fmt, const char *param)
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{
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char *msg = (char *)fmt;
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@ -145,7 +179,9 @@ static int smtp_checkp(const char *fmt, const char *param, int code)
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// if code != -1 then checks whether the number equals the code
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// if not equal -> die saying msg
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#if ENABLE_FEATURE_SENDMAIL_EHLO
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while ((answer = xmalloc_getline(stdin)) && '-' == answer[3]) ;
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while ((answer = xmalloc_getline(stdin)) != NULL)
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if (strlen(answer) <= 3 || '-' != answer[3])
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break;
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#else
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answer = xmalloc_getline(stdin);
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#endif
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@ -169,27 +205,6 @@ static int smtp_check(const char *fmt, int code)
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return smtp_checkp(fmt, NULL, code);
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}
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static void pop3_checkr(const char *fmt, const char *param, char **ret)
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{
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char *msg = command(fmt, param);
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char *answer = xmalloc_getline(stdin);
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if (answer && '+' == answer[0]) {
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alarm(0);
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if (ret)
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*ret = answer;
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else
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free(answer);
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return;
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}
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kill_helper();
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bb_error_msg_and_die("%s failed", msg);
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}
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static void pop3_check(const char *fmt, const char *param)
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{
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pop3_checkr(fmt, param, NULL);
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}
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// strip argument of bad chars
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static char *sane(char *str)
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{
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@ -205,13 +220,38 @@ static char *sane(char *str)
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return str;
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}
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static void pop3_message(int fd)
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#if ENABLE_FETCHMAIL
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static void pop3_checkr(const char *fmt, const char *param, char **ret)
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{
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char *msg = command(fmt, param);
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char *answer = xmalloc_getline(stdin);
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if (answer && '+' == *answer) {
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alarm(0);
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if (ret)
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*ret = answer+4; // skip "+OK "
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else if (ENABLE_FEATURE_CLEAN_UP)
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free(answer);
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return;
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}
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kill_helper();
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bb_error_msg_and_die("%s failed", msg);
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}
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static void pop3_check(const char *fmt, const char *param)
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{
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pop3_checkr(fmt, param, NULL);
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}
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static void pop3_message(const char *filename)
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{
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int fd;
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char *answer;
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// read stdin, copy to file fd
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// create and open file filename
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// read stdin, copy to created file
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fd = xopen(filename, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL);
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while ((answer = xmalloc_fgets_str(stdin, "\r\n"))) {
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char *s = answer;
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if ('.' == answer[0]) {
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if ('.' == *answer) {
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if ('.' == answer[1])
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s++;
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else if ('\r' == answer[1] && '\n' == answer[2] && '\0' == answer[3])
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@ -222,64 +262,56 @@ static void pop3_message(int fd)
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}
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close(fd);
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}
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static const char *args[] = {
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"openssl", "s_client", "-quiet", "-connect", NULL, "-tls1", "-starttls", "smtp", NULL
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};
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#define opt_connect args[4]
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#define opt_after_connect args[5]
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#endif
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int sendgetmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int sendgetmail_main(int argc, char **argv)
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{
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llist_t *recipients = NULL;
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char *from;
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const char *subject;
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char *charset = (char *)"utf-8";
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llist_t *opt_recipients = NULL;
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#if !ENABLE_FEATURE_FETCHMAIL_FILTER
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char *opt_subject;
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char *opt_charset = (char *)"utf-8";
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#endif
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const char *opt_user;
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const char *opt_pass;
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const char *opt_timeout;
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const char *opt_chdir;
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enum {
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OPT_C = 1 << 0, // chdir
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OPT_w = 1 << 1, // network timeout
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OPT_U = 1 << 2, // user
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OPT_P = 1 << 3, // password
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OPT_X = 1 << 4, // use openssl connection helper
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OPT_w = 1 << 0, // network timeout
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OPT_U = 1 << 1, // user
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OPT_P = 1 << 2, // password
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OPT_X = 1 << 3, // connect using openssl s_client helper
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OPTS_t = 1 << 5, // sendmail "to"
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OPTF_t = 1 << 5, // fetchmail "TOP"
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OPTS_n = 1 << 4, // sendmail: request notification
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OPTF_t = 1 << 4, // fetchmail: use "TOP" not "RETR"
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OPTS_f = 1 << 6, // sendmail "from"
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OPTF_z = 1 << 6, // fetchmail "delete"
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OPTS_s = 1 << 5, // sendmail: subject
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OPTF_z = 1 << 5, // fetchmail: delete from server
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OPTS_n = 1 << 7, // notification
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OPTS_s = 1 << 8, // subject given
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OPTS_c = 1 << 9, // charset for subject and body
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OPTS_c = 1 << 6, // sendmail: assumed charset
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OPTS_t = 1 << 7, // sendmail: recipient(s)
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};
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const char *options;
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unsigned opts;
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// SENDMAIL
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if ('s' == applet_name[0]) {
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// save initial stdin
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INIT_G();
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if (!ENABLE_FETCHMAIL || 's' == applet_name[0]) {
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// SENDMAIL
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// save initial stdin (body or attachements can be piped!)
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xdup2(STDIN_FILENO, INITIAL_STDIN_FILENO);
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// -f must be specified
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// -t may be multiple
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opt_complementary = "-1:f:t::";
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options = "C:w:U:P:X" "t:f:ns:c:";
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// FETCHMAIL
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opt_complementary = "-2:w+:t:t::"; // count(-t) > 0
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options = "w:U:P:X" "ns:c:t:";
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} else {
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// FETCHMAIL
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opt_after_connect = NULL;
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opt_complementary = "=1:P";
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options = "C:w:U:P:X" "tz";
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opt_complementary = "-2:w+:P";
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options = "w:U:P:X" "tz";
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}
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opts = getopt32(argv, options,
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&opt_chdir, &opt_timeout, &opt_user, &opt_pass,
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&recipients, &from, &subject, &charset
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&timeout, &opt_user, &opt_pass,
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&opt_subject, &opt_charset, &opt_recipients
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);
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//argc -= optind;
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@ -288,16 +320,9 @@ int sendgetmail_main(int argc, char **argv)
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// first argument is remote server[:port]
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opt_connect = *argv++;
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if (opts & OPT_w)
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timeout = xatou(opt_timeout);
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// chdir
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if (opts & OPT_C)
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xchdir(opt_chdir);
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// connect to server
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if (opts & OPT_X) {
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launch_helper(args);
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launch_helper(xargs);
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} else {
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// no connection helper provided -> make plain connect
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int fd = create_and_connect_stream_or_die(opt_connect, 0);
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@ -305,24 +330,30 @@ int sendgetmail_main(int argc, char **argv)
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xdup2(STDIN_FILENO, STDOUT_FILENO);
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}
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// randomize
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srand(time(NULL));
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// SENDMAIL
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if (recipients) {
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#if ENABLE_FETCHMAIL
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if (opt_after_connect)
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#endif
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{
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// SENDMAIL
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char *opt_from;
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int code;
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char *boundary;
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const char *fmt;
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const char *p;
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char *q;
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// wait for initial OK on plain connect
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if (!(opts & OPT_X))
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smtp_check(NULL, 220);
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sane(from);
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// get specified sender
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opt_from = sane(*argv++);
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// introduce to server
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// should we respect modern (but useless here) EHLO?
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// or should they respect we wanna be tiny?!
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if (!ENABLE_FEATURE_SENDMAIL_EHLO || 250 != smtp_checkp("EHLO %s", from, -1)) {
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smtp_checkp("HELO %s", from, 250);
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if (!ENABLE_FEATURE_SENDMAIL_EHLO || 250 != smtp_checkp("EHLO %s", opt_from, -1)) {
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smtp_checkp("HELO %s", opt_from, 250);
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}
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// set sender
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@ -330,13 +361,13 @@ int sendgetmail_main(int argc, char **argv)
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// no authentication is possible
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code = (opts & OPT_P) ? -1 : 250;
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// first try softly without authentication
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while (250 != smtp_checkp("MAIL FROM:<%s>", from, code)) {
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while (250 != smtp_checkp("MAIL FROM:<%s>", opt_from, code)) {
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// MAIL FROM failed -> authentication needed
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// do we have username?
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if (!(opts & OPT_U)) {
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// no! fetch it from "from" option
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//opts |= OPT_U;
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opt_user = xstrdup(from);
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opt_user = xstrdup(opt_from);
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*strchrnul(opt_user, '@') = '\0';
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}
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// now it seems we have username
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@ -351,30 +382,35 @@ int sendgetmail_main(int argc, char **argv)
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// but now die on failure
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code = 250;
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}
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// set recipients
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for (llist_t *to = recipients; to; to = to->link) {
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for (llist_t *to = opt_recipients; to; to = to->link) {
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smtp_checkp("RCPT TO:<%s>", sane(to->data), 250);
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}
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// now put message
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smtp_check("DATA", 354);
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// put address headers
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printf("From: %s\r\n", from);
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for (llist_t *to = recipients; to; to = to->link) {
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printf("From: %s\r\n", opt_from);
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for (llist_t *to = opt_recipients; to; to = to->link) {
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printf("To: %s\r\n", to->data);
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}
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// put encoded subject
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if (opts & OPTS_c)
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sane(charset);
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sane((char *)opt_charset);
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if (opts & OPTS_s) {
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printf("Subject: =?%s?B?", charset);
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uuencode(NULL, subject);
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printf("Subject: =?%s?B?", opt_charset);
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uuencode(NULL, opt_subject);
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printf("?=\r\n");
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}
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// put notification
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if (opts & OPTS_n)
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printf("Disposition-Notification-To: %s\r\n", from);
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printf("Disposition-Notification-To: %s\r\n", opt_from);
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// put common headers and body start
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// randomize
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#if ENABLE_FEATURE_SENDMAIL_BLOATY
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srand(time(NULL));
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#endif
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boundary = xasprintf("%d-%d-%d", rand(), rand(), rand());
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printf(
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USE_FEATURE_SENDMAIL_BLOATY("X-Mailer: busybox " BB_VER " sendmail\r\n")
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@ -386,16 +422,16 @@ int sendgetmail_main(int argc, char **argv)
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, boundary
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);
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// put body + attachment(s)
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{
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const char *fmt =
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fmt =
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"\r\n--%s\r\n"
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"%stext/plain; charset=%s\r\n"
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"%s%s\r\n"
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"%s"
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;
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const char *p = charset;
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char *q = (char *)"";
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while (argv[0]) {
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p = opt_charset;
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q = (char *)"";
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while (*argv) {
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printf(
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fmt
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, boundary
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@ -414,9 +450,9 @@ int sendgetmail_main(int argc, char **argv)
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;
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||||
uuencode(*argv, NULL);
|
||||
if (*(++argv))
|
||||
q = bb_get_last_path_component_strip(argv[0]);
|
||||
q = bb_get_last_path_component_strip(*argv);
|
||||
}
|
||||
}
|
||||
|
||||
// put terminator
|
||||
printf("\r\n--%s--\r\n" "\r\n", boundary);
|
||||
if (ENABLE_FEATURE_CLEAN_UP)
|
||||
@ -426,11 +462,25 @@ int sendgetmail_main(int argc, char **argv)
|
||||
smtp_check(".", 250);
|
||||
smtp_check("QUIT", 221);
|
||||
|
||||
// FETCHMAIL
|
||||
#if ENABLE_FETCHMAIL
|
||||
} else {
|
||||
// authenticate
|
||||
// FETCHMAIL
|
||||
char *buf;
|
||||
unsigned nmsg;
|
||||
char *hostname;
|
||||
pid_t pid;
|
||||
// cache fetch command
|
||||
const char *retr = (opts & OPTF_t) ? "TOP %u 0" : "RETR %u";
|
||||
|
||||
// goto maildir
|
||||
xchdir(*argv++);
|
||||
|
||||
#if ENABLE_FEATURE_FETCHMAIL_FILTER
|
||||
// cache postprocess program
|
||||
*fargs = *argv;
|
||||
#endif
|
||||
|
||||
// authenticate
|
||||
if (!(opts & OPT_U)) {
|
||||
//opts |= OPT_U;
|
||||
opt_user = getenv("USER");
|
||||
@ -438,25 +488,29 @@ int sendgetmail_main(int argc, char **argv)
|
||||
#if ENABLE_FEATURE_FETCHMAIL_APOP
|
||||
pop3_checkr(NULL, NULL, &buf);
|
||||
// server supports APOP?
|
||||
if ('<' == buf[4]) {
|
||||
if ('<' == *buf) {
|
||||
md5_ctx_t md5;
|
||||
uint8_t hex[16*2 + 1];
|
||||
// yes. compose <stamp><password>
|
||||
char *s = strchr(buf, '>');
|
||||
if (s)
|
||||
strcpy(s+1, opt_pass);
|
||||
s = buf+4;
|
||||
s = buf;
|
||||
// get md5 sum of <stamp><password>
|
||||
md5_begin(&md5);
|
||||
md5_hash(s, strlen(s), &md5);
|
||||
md5_end(s, &md5);
|
||||
bin2hex(hex, s, 16);
|
||||
// NOTE: md5 struct contains enough space
|
||||
// so we reuse md5 space instead of xzalloc(16*2+1)
|
||||
#define md5_hex ((uint8_t *)&md5)
|
||||
// uint8_t *md5_hex = (uint8_t *)&md5;
|
||||
*bin2hex(md5_hex, s, 16) = '\0';
|
||||
// APOP
|
||||
s = xasprintf("%s %s", opt_user, hex);
|
||||
s = xasprintf("%s %s", opt_user, md5_hex);
|
||||
#undef md5_hex
|
||||
pop3_check("APOP %s", s);
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(s);
|
||||
free(buf);
|
||||
free(buf-4); // buf is "+OK " away from malloc'ed string
|
||||
}
|
||||
} else {
|
||||
#else
|
||||
@ -472,60 +526,64 @@ int sendgetmail_main(int argc, char **argv)
|
||||
// get statistics
|
||||
pop3_checkr("STAT", NULL, &buf);
|
||||
|
||||
// prepare message filename suffix
|
||||
hostname = xzalloc(MAXHOSTNAMELEN+1);
|
||||
gethostname(hostname, MAXHOSTNAMELEN);
|
||||
pid = getpid();
|
||||
|
||||
// get number of messages
|
||||
nmsg = atoi(buf+4);
|
||||
// NOTE: we don't use xatou(buf) since buf is "nmsg nbytes"
|
||||
// we only need nmsg and atoi is just exactly what we need
|
||||
// if atoi fails to convert buf into number it returns 0
|
||||
// in this case the following loop simply will not be executed
|
||||
nmsg = atoi(buf);
|
||||
if (ENABLE_FEATURE_CLEAN_UP)
|
||||
free(buf);
|
||||
free(buf-4); // buf is "+OK " away from malloc'ed string
|
||||
|
||||
// lock maildir
|
||||
////USE_FEATURE_CLEAN_UP(close)(xopen(".lock", O_CREAT | O_WRONLY | O_TRUNC | O_EXCL));
|
||||
|
||||
// make tempnam(dir, salt) respect dir argument
|
||||
unsetenv("TMPDIR");
|
||||
|
||||
// TODO: piping through external filter argv... if *argv
|
||||
|
||||
// cache fetch command
|
||||
{
|
||||
const char *retr = (opts & OPTF_t) ? "TOP %u 0" : "RETR %u";
|
||||
// loop through messages
|
||||
for (; nmsg; nmsg--) {
|
||||
int fd;
|
||||
char tmp_name[sizeof("tmp/XXXXXX")];
|
||||
char new_name[sizeof("new/XXXXXX")];
|
||||
|
||||
char *filename = xasprintf("tmp/%llu.%u.%s", monotonic_us(), pid, hostname);
|
||||
char *target;
|
||||
#if ENABLE_FEATURE_FETCHMAIL_FILTER
|
||||
int rc;
|
||||
#endif
|
||||
// retrieve message in ./tmp
|
||||
strcpy(tmp_name, "tmp/XXXXXX");
|
||||
fd = mkstemp(tmp_name);
|
||||
if (fd < 0)
|
||||
bb_perror_msg_and_die("cannot create unique file");
|
||||
pop3_check(retr, (const char *)nmsg);
|
||||
pop3_message(fd); // NB: closes fd
|
||||
|
||||
// move file to ./new atomically
|
||||
strncpy(new_name, "new", 3);
|
||||
strcpy(new_name + 3, tmp_name + 3);
|
||||
if (rename(tmp_name, new_name) < 0) {
|
||||
// rats! such file exists! try to make unique name
|
||||
strcpy(new_name + 3, "tmp/XXXXXX" + 3);
|
||||
fd = mkstemp(new_name);
|
||||
if (fd < 0)
|
||||
bb_perror_msg_and_die("cannot create unique file");
|
||||
close(fd);
|
||||
xrename(tmp_name, new_name);
|
||||
}
|
||||
|
||||
pop3_message(filename);
|
||||
// delete message from server
|
||||
if (opts & OPTF_z)
|
||||
pop3_check("DELE %u", (const char*)nmsg);
|
||||
|
||||
#if ENABLE_FEATURE_FETCHMAIL_FILTER
|
||||
// run postprocessing program
|
||||
if (*fargs) {
|
||||
fargs[1] = filename;
|
||||
rc = wait4pid(spawn((char **)fargs));
|
||||
if (99 == rc)
|
||||
break;
|
||||
if (1 == rc)
|
||||
goto skip;
|
||||
}
|
||||
#endif
|
||||
// atomically move message to ./new
|
||||
target = xstrdup(filename);
|
||||
strncpy(target, "new", 3);
|
||||
// ... or just stop receiving on error
|
||||
if (rename_or_warn(filename, target))
|
||||
break;
|
||||
free(target);
|
||||
#if ENABLE_FEATURE_FETCHMAIL_FILTER
|
||||
skip:
|
||||
#endif
|
||||
free(filename);
|
||||
}
|
||||
}
|
||||
|
||||
if (ENABLE_FEATURE_CLEAN_UP)
|
||||
free(hostname);
|
||||
|
||||
// Bye
|
||||
pop3_check("QUIT", NULL);
|
||||
|
||||
// unlock maildir
|
||||
////unlink(".lock");
|
||||
#endif // ENABLE_FETCHMAIL
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user