From 67ca2ef061a73bc90e4399471ee0cb3ce6f0ee41 Mon Sep 17 00:00:00 2001 From: Sergey Poznyakoff Date: Tue, 8 Dec 2009 22:08:36 +0200 Subject: Implement GPG signing of the outgoing notifications. * src/config.c (mail_statistics_kw): New keyword gpg-sign. (notify_event_kw): Likewise. (wydawca_kw): New keyword gpg-homedir. * src/gpg.c (wydawca_gpg_homedir): Rename to create_gpg_homedir. Make static. All uses updated. * src/mail.c (admin_stat_sign_key): New global. (mu_stream_data_read_cb) (gpg_sign, sign_message): New functions. (mail_send_message): Take 3rd argument: ID of the PGP key to sign the message with. All callers updated. (do_notify): Rewrite. * src/wydawca.c (wydawca_gpg_homedir): New variable. * src/wydawca.h (struct notification): New member sign_keys. (admin_stat_sign_key): New extern. (wydawca_gpg_homedir): New extern. --- src/mail.c | 244 +++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 222 insertions(+), 22 deletions(-) (limited to 'src/mail.c') diff --git a/src/mail.c b/src/mail.c index 91ea502..15c2937 100644 --- a/src/mail.c +++ b/src/mail.c @@ -17,6 +17,7 @@ #include "wydawca.h" #include #include +#include int mailer_opened; mu_mailer_t mailer; @@ -27,6 +28,7 @@ unsigned long owner_notification_flags; char *user_message_template[MAX_EVENT]; char *admin_stat_message; +char *admin_stat_sign_key; void mail_init () @@ -44,8 +46,203 @@ mail_init () } } +struct mu_stream_handle +{ + mu_stream_t str; + mu_off_t off; +}; + +static ssize_t +mu_stream_data_read_cb (void *handle, void *buffer, size_t size) +{ + struct mu_stream_handle *mhp = handle; + size_t nread; + int rc; + + rc = mu_stream_read (mhp->str, buffer, size, mhp->off, &nread); + if (rc) + { + logmsg (LOG_ERR, "mu_stream_read: %s", mu_strerror (rc)); + errno = EIO; + return -1; + } + + mhp->off += nread; + return nread; +} + +static int +gpg_sign (gpgme_data_t *output, gpgme_data_t input, const char *sign_keys) +{ + gpgme_ctx_t ctx; + gpgme_error_t err = 0; + gpgme_key_t key; + + err = gpgme_new (&ctx); + if (err) + { + logmsg (LOG_ERR, _("GPGME: cannot create context: %s"), + gpgme_strerror (err)); + return 1; + } + + err = gpgme_op_keylist_start (ctx, sign_keys, 0); + if (!err) + { + while ((err = gpgme_op_keylist_next (ctx, &key)) == 0) + { + err = gpgme_signers_add (ctx, key); + gpgme_key_release (key); + } + } + + if (err && gpg_err_code (err) != GPG_ERR_EOF) + { + logmsg (LOG_ERR, _("GPGME: cannot list keys: %s"), + gpgme_strerror (err)); + gpgme_release (ctx); + return 1; + } + + err = gpgme_data_new (output); + if (err) + { + logmsg (LOG_ERR, _("%s: GPGME error: %s"), + "gpgme_data_new", + gpgme_strerror (err)); + gpgme_release (ctx); + return 1; + } + + /* FIXME: Passphrase */ + gpgme_set_textmode (ctx, 1); + gpgme_set_armor (ctx, 1); + + err = gpgme_op_sign (ctx, input, *output, GPGME_SIG_MODE_CLEAR); + if (err) + logmsg (LOG_ERR, _("%s: GPGME error: %s"), + "gpgme_op_sign", + gpgme_strerror (err)); +#if 0 + /* FIXME: */ + else if (debug_level > 1) + gpgme_debug_info (ctx); +#endif + + gpgme_release (ctx); + return err != 0; +} + +static int +sign_message (mu_message_t *pmsg, const char *key) +{ + mu_message_t msg = *pmsg; + mu_message_t newmsg; + mu_body_t body; + mu_header_t hdr; + struct mu_stream_handle mhn; + mu_stream_t istr, ostr; + int rc; + struct gpgme_data_cbs cbs; + gpgme_data_t input, output; + gpgme_error_t err; + char *buf = NULL; + size_t size = 0; + size_t nread; + + if (debug_level) + logmsg (LOG_DEBUG, _("signing message as %s"), key); + + if (wydawca_gpg_homedir) + { + if (debug_level > 1) + logmsg (LOG_DEBUG, _("setting GNUPG home directory: %s"), + wydawca_gpg_homedir); + setenv ("GNUPGHOME", wydawca_gpg_homedir, 1); + } + + if ((rc = mu_message_get_body (msg, &body))) + { + logmsg (LOG_ERR, "mu_message_get_body: %s", mu_strerror (rc)); + return 1; + } + + if ((rc = mu_body_get_stream (body, &mhn.str))) + { + logmsg (LOG_ERR, "mu_message_get_stream: %s", mu_strerror (rc)); + return 1; + } + + mu_stream_seek (mhn.str, 0, SEEK_SET); + mhn.off = 0; + + memset (&cbs, 0, sizeof (cbs)); + cbs.read = mu_stream_data_read_cb; + + err = gpgme_data_new_from_cbs (&input, &cbs, &mhn); + if (err) + { + logmsg (LOG_ERR, "gpgme_data_new_from_cbs: %s", + gpgme_strerror (rc)); + return 1; + } + + rc = gpg_sign (&output, input, key); + + if (gpgme_data_seek (output, 0, SEEK_SET) == -1) + { + logmsg (LOG_ERR, "gpgme_data_seek: %s", strerror (errno)); + return 1; + } + + mu_message_create (&newmsg, NULL); + mu_message_get_stream (newmsg, &ostr); + + /* Copy headers */ + mu_message_get_header (msg, &hdr); + mu_header_get_stream (hdr, &istr); + mu_stream_seek (istr, 0, SEEK_SET); + while ((rc = mu_stream_sequential_getline (istr, &buf, &size, &nread)) == 0 + && nread) + { + rc = mu_stream_sequential_write (ostr, buf, nread); + if (rc) + { + logmsg (LOG_ERR, "mu_stream_sequential_write: %s", + mu_strerror (rc)); + break; + } + } + + if (rc == 0) + { + while ((nread = gpgme_data_read (output, buf, size)) > 0) + { + rc = mu_stream_sequential_write (ostr, buf, nread); + if (rc) + { + logmsg (LOG_ERR, "mu_stream_sequential_write: %s", + mu_strerror (rc)); + break; + } + } + + if (rc == 0) + { + mu_message_destroy (&msg, mu_message_get_owner (msg)); + *pmsg = newmsg; + } + } + + gpgme_data_release (output); + free (buf); + + return rc; +} + void -mail_send_message (mu_address_t rcpt, const char *text) +mail_send_message (mu_address_t rcpt, const char *text, + const char *signer_key) { int rc; mu_message_t msg; @@ -91,7 +288,7 @@ mail_send_message (mu_address_t rcpt, const char *text) if (debug_level > 2) mailer_flags = MAILER_FLAG_DEBUG_DATA; } - + if (!mailer_opened) { if ((rc = mu_mailer_open (mailer, mailer_flags))) @@ -106,10 +303,16 @@ mail_send_message (mu_address_t rcpt, const char *text) mailer_opened = 1; } - rc = mu_mailer_send_message (mailer, msg, from_address, rcpt); - if (rc) - logmsg (LOG_CRIT, _("cannot send message: %s"), mu_strerror (rc)); - + if (signer_key) + sign_message (&msg, signer_key); + + if (!dry_run_mode) + { + rc = mu_mailer_send_message (mailer, msg, from_address, rcpt); + if (rc) + logmsg (LOG_CRIT, _("cannot send message: %s"), mu_strerror (rc)); + } + mu_message_destroy (&msg, mu_message_get_owner (msg)); } @@ -244,9 +447,6 @@ mail_stats () free (buf); } - if (dry_run_mode) - return; - tc = timer_get_count () * 3; exp = make_stat_expansion (tc + 1); time (&t); @@ -264,7 +464,7 @@ mail_stats () } text = meta_expand_string (tmpl, exp, NULL, NULL, NULL); - mail_send_message (admin_address, text); + mail_send_message (admin_address, text, admin_stat_sign_key); free (text); meta_free (exp); @@ -366,6 +566,8 @@ do_notify (struct file_triplet *trp, enum notification_event ev, { mu_address_t rcpt = NULL; const char *errp; + const char *msg; + switch (ntf->tgt) { case notify_read: @@ -408,21 +610,19 @@ do_notify (struct file_triplet *trp, enum notification_event ev, free (buf); } else - logmsg (LOG_DEBUG, _("notifying message recipients (project %s) about %s"), + logmsg (LOG_DEBUG, + _("notifying message recipients (project %s) about %s"), trp->project, notification_event_str (ev)); } - - if (!dry_run_mode) + + msg = resolve_message_template (ntf->msg); + if (!msg) + logmsg (LOG_ERR, _("undefined message reference: %s"), ntf->msg); + else { - const char *msg = resolve_message_template (ntf->msg); - if (!msg) - logmsg (LOG_ERR, _("undefined message reference: %s"), ntf->msg); - else - { - char *text = triplet_expand_param (msg, trp); - mail_send_message (rcpt, text); - free (text); - } + char *text = triplet_expand_param (msg, trp); + mail_send_message (rcpt, text, ntf->sign_keys); + free (text); } mu_address_destroy (&rcpt); -- cgit v1.2.1