]> the.earth.li Git - onak.git/blobdiff - keyd.c
Use common function for command sending in keyd client code
[onak.git] / keyd.c
diff --git a/keyd.c b/keyd.c
index a89f0e1f37aade33ecf00d4f171f92d191bf1dee..18e9ddca873a84e37c172408bb0ecdc20b611b19 100644 (file)
--- a/keyd.c
+++ b/keyd.c
@@ -48,7 +48,7 @@
 
 static struct keyd_stats *stats;
 
-void daemonize(void)
+static void daemonize(void)
 {
        pid_t pid;
 
@@ -65,61 +65,126 @@ void daemonize(void)
                exit(EXIT_SUCCESS);
        }
 
-       pid = setsid();
+       if (setsid() == -1) {
+               logthing(LOGTHING_CRITICAL,
+                       "Couldn't set process group leader: %d (%s)",
+                       errno,
+                       strerror(errno));
+               exit(EXIT_FAILURE);
+       }
 
-       freopen("/dev/null", "r", stdin);
-       freopen("/dev/null", "w", stdout);
-       freopen("/dev/null", "w", stderr);
+       if (!freopen("/dev/null", "r", stdin)) {
+               logthing(LOGTHING_CRITICAL,
+                       "Couldn't reopen stdin to NULL: %d (%s)",
+                       errno,
+                       strerror(errno));
+               exit(EXIT_FAILURE);
+       }
+       if (!freopen("/dev/null", "w", stdout)) {
+               logthing(LOGTHING_CRITICAL,
+                       "Couldn't reopen stdout to NULL: %d (%s)",
+                       errno,
+                       strerror(errno));
+               exit(EXIT_FAILURE);
+       }
+       if (!freopen("/dev/null", "w", stderr)) {
+               logthing(LOGTHING_CRITICAL,
+                       "Couldn't reopen stderr to NULL: %d (%s)",
+                       errno,
+                       strerror(errno));
+               exit(EXIT_FAILURE);
+       }
 
        return;
 }
 
-void iteratefunc(void *ctx, struct openpgp_publickey *key)
+static bool keyd_write_key(int fd, struct openpgp_publickey *key)
 {
        struct openpgp_packet_list *packets = NULL;
        struct openpgp_packet_list *list_end = NULL;
        struct buffer_ctx           storebuf;
-       int                         ret = 0;
-       int                         *fd = (int *) ctx;
-       uint64_t                    keyid;
+       ssize_t written;
+       bool    ok = true;
 
-       if (key != NULL) {
-               storebuf.offset = 0;
-               storebuf.size = 8192;
-               storebuf.buffer = malloc(8192);
+       storebuf.offset = 0;
+       storebuf.size = 8192;
+       storebuf.buffer = malloc(8192);
 
-               get_keyid(key, &keyid);
-               logthing(LOGTHING_TRACE,
-                               "Iterating over 0x%016" PRIX64 ".",
-                               keyid);
-
-               flatten_publickey(key,
+       flatten_publickey(key,
                                &packets,
                                &list_end);
-               write_openpgp_stream(buffer_putchar,
+       write_openpgp_stream(buffer_putchar,
                                &storebuf,
                                packets);
-               logthing(LOGTHING_TRACE,
+       logthing(LOGTHING_TRACE,
                                "Sending %d bytes.",
                                storebuf.offset);
-               ret = write(*fd, &storebuf.offset,
+       written = write(fd, &storebuf.offset,
                        sizeof(storebuf.offset));
-               if (ret != 0) {
-                       write(*fd, storebuf.buffer,
-                               storebuf.offset);
+       if (written == 0) {
+               ok = false;
+       } else {
+               written = write(fd, storebuf.buffer,
+                       storebuf.offset);
+               if (written != storebuf.offset) {
+                       ok = false;
                }
+       }
+
+       free(storebuf.buffer);
+       storebuf.buffer = NULL;
+       storebuf.size = storebuf.offset = 0;
+       free_packet_list(packets);
+       packets = list_end = NULL;
 
-               free(storebuf.buffer);
-               storebuf.buffer = NULL;
-               storebuf.size = storebuf.offset = 0;
-               free_packet_list(packets);
-               packets = list_end = NULL;
+       return (ok);
+}
+
+static bool keyd_write_reply(int fd, enum keyd_reply _reply)
+{
+       uint32_t reply = _reply;
+       ssize_t written;
+       bool ok = true;
+
+       written = write(fd, &reply, sizeof(reply));
+       if (written != sizeof(reply)) {
+               ok = false;
+       }
+
+       return (ok);
+}
+
+static bool keyd_write_size(int fd, size_t size)
+{
+       ssize_t written;
+       bool ok = true;
+
+       written = write(fd, &size, sizeof(size));
+       if (written != sizeof(size)) {
+               ok = false;
+       }
+
+       return (ok);
+}
+
+static void iteratefunc(void *ctx, struct openpgp_publickey *key)
+{
+       int      *fd = (int *) ctx;
+       uint64_t  keyid;
+
+       if (key != NULL) {
+               get_keyid(key, &keyid);
+               logthing(LOGTHING_TRACE,
+                               "Iterating over 0x%016" PRIX64 ".",
+                               keyid);
+
+               keyd_write_key(*fd, key);
        }
 
        return;
 }
 
-int sock_init(const char *sockname)
+static int sock_init(const char *sockname)
 {
        struct sockaddr_un sock;
        int                fd = -1;
@@ -139,25 +204,28 @@ int sock_init(const char *sockname)
 
        if (ret != -1) {
                ret = listen(fd, 5);
+               if (ret == -1) {
+                       close(fd);
+                       fd = -1;
+               }
        }
-       
+
        return fd;
 }
 
-int sock_do(int fd)
+static int sock_do(struct onak_dbctx *dbctx, int fd)
 {
        uint32_t cmd = KEYD_CMD_UNKNOWN;
        ssize_t  bytes = 0;
        ssize_t  count = 0;
        int      ret = 0;
        uint64_t keyid = 0;
-       uint8_t  fp[MAX_FINGERPRINT_LEN];
        char     *search = NULL;
        struct openpgp_publickey *key = NULL;
        struct openpgp_packet_list *packets = NULL;
-       struct openpgp_packet_list *list_end = NULL;
        struct buffer_ctx storebuf;
        struct skshash hash;
+       struct openpgp_fingerprint fingerprint;
 
        /*
         * Get the command from the client.
@@ -178,170 +246,141 @@ int sock_do(int fd)
                }
                switch (cmd) {
                case KEYD_CMD_VERSION:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       cmd = sizeof(keyd_version);
-                       write(fd, &cmd, sizeof(cmd));
-                       write(fd, &keyd_version, sizeof(keyd_version));
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
+                               ret = 1;
+                       }
+                       if (ret == 0) {
+                               cmd = sizeof(keyd_version);
+                               bytes = write(fd, &cmd, sizeof(cmd));
+                               if (bytes != sizeof(cmd)) {
+                                       ret = 1;
+                               }
+                       }
+                       if (ret == 0) {
+                               bytes = write(fd, &keyd_version,
+                                       sizeof(keyd_version));
+                               if (bytes != sizeof(keyd_version)) {
+                                       ret = 1;
+                               }
+                       }
                        break;
                case KEYD_CMD_GET_ID:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       bytes = read(fd, &keyid, sizeof(keyid));
-                       if (bytes != sizeof(keyid)) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
                        }
-                       storebuf.offset = 0;
+                       if (ret == 0) {
+                               bytes = read(fd, &keyid, sizeof(keyid));
+                               if (bytes != sizeof(keyid)) {
+                                       ret = 1;
+                               }
+                       }
                        if (ret == 0) {
                                logthing(LOGTHING_INFO,
                                                "Fetching 0x%" PRIX64
                                                ", result: %d",
                                                keyid,
-                                               config.dbbackend->
-                                               fetch_key_id(keyid,
+                                               dbctx->fetch_key_id(dbctx,
+                                                       keyid,
                                                        &key, false));
                                if (key != NULL) {
-                                       storebuf.size = 8192;
-                                       storebuf.buffer = malloc(8192);
-
-                                       flatten_publickey(key,
-                                                       &packets,
-                                                       &list_end);
-                                       write_openpgp_stream(buffer_putchar,
-                                                       &storebuf,
-                                                       packets);
-                                       logthing(LOGTHING_TRACE,
-                                                       "Sending %d bytes.",
-                                                       storebuf.offset);
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
-                                       write(fd, storebuf.buffer,
-                                               storebuf.offset);
-
-                                       free(storebuf.buffer);
-                                       storebuf.buffer = NULL;
-                                       storebuf.size = storebuf.offset = 0;
-                                       free_packet_list(packets);
-                                       packets = list_end = NULL;
+                                       keyd_write_key(fd, key);
                                        free_publickey(key);
                                        key = NULL;
                                } else {
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
+                                       if (!keyd_write_size(fd, 0)) {
+                                               ret = 1;
+                                       }
                                }
                        }
                        break;
                case KEYD_CMD_GET_FP:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       read(fd, &bytes, 1);
-                       if (bytes > MAX_FINGERPRINT_LEN) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
-                       } else {
-                               read(fd, fp, bytes);
                        }
-                       storebuf.offset = 0;
+                       if (ret == 0) {
+                               if ((read(fd, &bytes, 1) != 1) ||
+                                               (bytes > MAX_FINGERPRINT_LEN)) {
+                                       ret = 1;
+                               } else {
+                                       fingerprint.length = bytes;
+                                       bytes = read(fd, fingerprint.fp,
+                                               fingerprint.length);
+                                       if (bytes != fingerprint.length) {
+                                               ret = 1;
+                                       }
+                               }
+                       }
                        if (ret == 0) {
                                logthing(LOGTHING_INFO,
                                                "Fetching by fingerprint"
                                                ", result: %d",
-                                               config.dbbackend->
-                                               fetch_key_fp(fp, bytes,
+                                               dbctx->fetch_key_fp(dbctx,
+                                                       &fingerprint,
                                                        &key, false));
                                if (key != NULL) {
-                                       storebuf.size = 8192;
-                                       storebuf.buffer = malloc(8192);
-
-                                       flatten_publickey(key,
-                                                       &packets,
-                                                       &list_end);
-                                       write_openpgp_stream(buffer_putchar,
-                                                       &storebuf,
-                                                       packets);
-                                       logthing(LOGTHING_TRACE,
-                                                       "Sending %d bytes.",
-                                                       storebuf.offset);
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
-                                       write(fd, storebuf.buffer,
-                                               storebuf.offset);
-
-                                       free(storebuf.buffer);
-                                       storebuf.buffer = NULL;
-                                       storebuf.size = storebuf.offset = 0;
-                                       free_packet_list(packets);
-                                       packets = list_end = NULL;
+                                       keyd_write_key(fd, key);
                                        free_publickey(key);
                                        key = NULL;
                                } else {
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
+                                       if (!keyd_write_size(fd, 0)) {
+                                               ret = 1;
+                                       }
                                }
                        }
                        break;
 
                case KEYD_CMD_GET_TEXT:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       bytes = read(fd, &count, sizeof(count));
-                       if (bytes != sizeof(count)) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
                        }
-                       storebuf.offset = 0;
+                       if (ret == 0) {
+                               bytes = read(fd, &count, sizeof(count));
+                               if (bytes != sizeof(count)) {
+                                       ret = 1;
+                               }
+                       }
                        if (ret == 0) {
                                search = malloc(count+1);
-                               read(fd, search, count);
+                               bytes = read(fd, search, count);
+                               if (bytes != count) {
+                                       ret = 1;
+                                       free(search);
+                                       break;
+                               }
                                search[count] = 0;
                                logthing(LOGTHING_INFO,
                                                "Fetching %s, result: %d",
                                                search,
-                                               config.dbbackend->
-                                               fetch_key_text(search, &key));
+                                               dbctx->fetch_key_text(dbctx,
+                                                       search, &key));
                                if (key != NULL) {
-                                       storebuf.size = 8192;
-                                       storebuf.buffer = malloc(8192);
-
-                                       flatten_publickey(key,
-                                                       &packets,
-                                                       &list_end);
-                                       write_openpgp_stream(buffer_putchar,
-                                                       &storebuf,
-                                                       packets);
-                                       logthing(LOGTHING_TRACE,
-                                                       "Sending %d bytes.",
-                                                       storebuf.offset);
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
-                                       write(fd, storebuf.buffer,
-                                               storebuf.offset);
-
-                                       free(storebuf.buffer);
-                                       storebuf.buffer = NULL;
-                                       storebuf.size = storebuf.offset = 0;
-                                       free_packet_list(packets);
-                                       packets = list_end = NULL;
+                                       keyd_write_key(fd, key);
                                        free_publickey(key);
                                        key = NULL;
                                } else {
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
+                                       if (!keyd_write_size(fd, 0)) {
+                                               ret = 1;
+                                       }
                                }
                                free(search);
                        }
                        break;
                case KEYD_CMD_STORE:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       storebuf.offset = 0;
-                       bytes = read(fd, &storebuf.size,
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
+                               ret = 1;
+                       }
+                       if (ret == 0) {
+                               bytes = read(fd, &storebuf.size,
                                        sizeof(storebuf.size));
-                       logthing(LOGTHING_TRACE, "Reading %d bytes.",
+                               logthing(LOGTHING_TRACE, "Reading %d bytes.",
                                        storebuf.size);
-                       if (bytes != sizeof(storebuf.size)) {
-                               ret = 1;
+                               if (bytes != sizeof(storebuf.size)) {
+                                       ret = 1;
+                               }
                        }
                        if (ret == 0 && storebuf.size > 0) {
                                storebuf.buffer = malloc(storebuf.size);
+                               storebuf.offset = 0;
                                bytes = count = 0;
                                while (bytes >= 0 && count < storebuf.size) {
                                        bytes = read(fd,
@@ -357,7 +396,7 @@ int sock_do(int fd)
                                                &packets,
                                                0);
                                parse_keys(packets, &key);
-                               config.dbbackend->store_key(key, false, false);
+                               dbctx->store_key(dbctx, key, false, false);
                                free_packet_list(packets);
                                packets = NULL;
                                free_publickey(key);
@@ -368,107 +407,116 @@ int sock_do(int fd)
                        }
                        break;
                case KEYD_CMD_DELETE:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       bytes = read(fd, &keyid, sizeof(keyid));
-                       if (bytes != sizeof(keyid)) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
                        }
+                       if (ret == 0) {
+                               bytes = read(fd, &keyid, sizeof(keyid));
+                               if (bytes != sizeof(keyid)) {
+                                       ret = 1;
+                               }
+                       }
                        if (ret == 0) {
                                logthing(LOGTHING_INFO,
                                                "Deleting 0x%" PRIX64
                                                ", result: %d",
                                                keyid,
-                                               config.dbbackend->delete_key(
+                                               dbctx->delete_key(dbctx,
                                                        keyid, false));
                        }
                        break;
                case KEYD_CMD_GETFULLKEYID:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       bytes = read(fd, &keyid, sizeof(keyid));
-                       if (bytes != sizeof(keyid)) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
                        }
                        if (ret == 0) {
-                               keyid = config.dbbackend->getfullkeyid(keyid);
+                               bytes = read(fd, &keyid, sizeof(keyid));
+                               if (bytes != sizeof(keyid)) {
+                                       ret = 1;
+                               }
+                       }
+                       if (ret == 0) {
+                               keyid = dbctx->getfullkeyid(dbctx, keyid);
                                cmd = sizeof(keyid);
-                               write(fd, &cmd, sizeof(cmd));
-                               write(fd, &keyid, sizeof(keyid));
+                               bytes = write(fd, &cmd, sizeof(cmd));
+                               if (bytes != sizeof(cmd)) {
+                                       ret = 1;
+                               }
+                       }
+                       if (ret == 0) {
+                               bytes = write(fd, &keyid, sizeof(keyid));
+                               if (bytes != sizeof(keyid)) {
+                                       ret = 1;
+                               }
                        }
                        break;
                case KEYD_CMD_KEYITER:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       config.dbbackend->iterate_keys(iteratefunc,
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
+                               ret = 1;
+                       }
+                       if (ret == 0) {
+                               dbctx->iterate_keys(dbctx, iteratefunc,
                                        &fd);
-                       bytes = 0;
-                       write(fd, &bytes, sizeof(bytes));
+                               if (!keyd_write_size(fd, 0)) {
+                                       ret = 1;
+                               }
+                       }
                        break;
                case KEYD_CMD_CLOSE:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
+                       /* We're going to close the FD even if this fails */
+                       (void) keyd_write_reply(fd, KEYD_REPLY_OK);
                        ret = 1;
                        break;
                case KEYD_CMD_QUIT:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
+                       /* We're going to quit even if this fails */
+                       (void) keyd_write_reply(fd, KEYD_REPLY_OK);
                        logthing(LOGTHING_NOTICE,
                                "Exiting due to quit request.");
                        ret = 1;
                        trytocleanup();
                        break;
                case KEYD_CMD_STATS:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       cmd = sizeof(*stats);
-                       write(fd, &cmd, sizeof(cmd));
-                       write(fd, stats,
-                               sizeof(*stats));
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
+                               ret = 1;
+                       }
+                       if (ret == 0) {
+                               cmd = sizeof(*stats);
+                               bytes = write(fd, &cmd, sizeof(cmd));
+                               if (bytes != sizeof(cmd)) {
+                                       ret = 1;
+                               }
+                       }
+                       if (ret == 0) {
+                               bytes = write(fd, stats, sizeof(*stats));
+                               if (bytes != sizeof(*stats)) {
+                                       ret = 1;
+                               }
+                       }
                        break;
                case KEYD_CMD_GET_SKSHASH:
-                       cmd = KEYD_REPLY_OK;
-                       write(fd, &cmd, sizeof(cmd));
-                       bytes = read(fd, hash.hash, sizeof(hash.hash));
-                       if (bytes != sizeof(hash.hash)) {
+                       if (!keyd_write_reply(fd, KEYD_REPLY_OK)) {
                                ret = 1;
                        }
-                       storebuf.offset = 0;
+                       if (ret == 0) {
+                               bytes = read(fd, hash.hash, sizeof(hash.hash));
+                               if (bytes != sizeof(hash.hash)) {
+                                       ret = 1;
+                               }
+                       }
                        if (ret == 0) {
                                logthing(LOGTHING_INFO,
                                                "Fetching by hash"
                                                ", result: %d",
-                                               config.dbbackend->
-                                               fetch_key_skshash(&hash,
-                                                       &key));
+                                               dbctx->fetch_key_skshash(dbctx,
+                                                       &hash, &key));
                                if (key != NULL) {
-                                       storebuf.size = 8192;
-                                       storebuf.buffer = malloc(8192);
-
-                                       flatten_publickey(key,
-                                                       &packets,
-                                                       &list_end);
-                                       write_openpgp_stream(buffer_putchar,
-                                                       &storebuf,
-                                                       packets);
-                                       logthing(LOGTHING_TRACE,
-                                                       "Sending %d bytes.",
-                                                       storebuf.offset);
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
-                                       write(fd, storebuf.buffer,
-                                               storebuf.offset);
-
-                                       free(storebuf.buffer);
-                                       storebuf.buffer = NULL;
-                                       storebuf.size = storebuf.offset = 0;
-                                       free_packet_list(packets);
-                                       packets = list_end = NULL;
+                                       keyd_write_key(fd, key);
                                        free_publickey(key);
                                        key = NULL;
                                } else {
-                                       write(fd, &storebuf.offset,
-                                               sizeof(storebuf.offset));
+                                       if (!keyd_write_size(fd, 0)) {
+                                               ret = 1;
+                                       }
                                }
                        }
                        break;
@@ -476,21 +524,22 @@ int sock_do(int fd)
                default:
                        logthing(LOGTHING_ERROR, "Got unknown command: %d",
                                        cmd);
-                       cmd = KEYD_REPLY_UNKNOWN_CMD;
-                       write(fd, &cmd, sizeof(cmd));
+                       if (!keyd_write_reply(fd, KEYD_REPLY_UNKNOWN_CMD)) {
+                               ret = 1;
+                       }
                }
        }
 
        return(ret);
 }
 
-int sock_close(int fd)
+static int sock_close(int fd)
 {
        shutdown(fd, SHUT_RDWR);
        return close(fd);
 }
 
-int sock_accept(int fd)
+static int sock_accept(int fd)
 {
        struct sockaddr_un sock;
        socklen_t          socklen;
@@ -531,10 +580,14 @@ int main(int argc, char *argv[])
        char *configfile = NULL;
        bool foreground = false;
        int optchar;
+       struct onak_dbctx *dbctx;
 
        while ((optchar = getopt(argc, argv, "c:fh")) != -1 ) {
                switch (optchar) {
                case 'c':
+                       if (configfile != NULL) {
+                               free(configfile);
+                       }
                        configfile = strdup(optarg);
                        break;
                case 'f':
@@ -578,7 +631,7 @@ int main(int argc, char *argv[])
                maxfd = fd;
                memset(clients, -1, sizeof (clients));
 
-               config.dbbackend->initdb(false);
+               dbctx = config.dbinit(false);
 
                logthing(LOGTHING_NOTICE, "Accepting connections.");
                while (!cleanup() && select(maxfd + 1, &rfds, NULL, NULL, NULL) != -1) {
@@ -592,7 +645,7 @@ int main(int argc, char *argv[])
                                                FD_ISSET(clients[i], &rfds)) {
                                        logthing(LOGTHING_DEBUG,
                                                "Handling connection for client %d.", i);
-                                       if (sock_do(clients[i])) {
+                                       if (sock_do(dbctx, clients[i])) {
                                                sock_close(clients[i]);
                                                clients[i] = -1;
                                                logthing(LOGTHING_DEBUG,
@@ -626,7 +679,7 @@ int main(int argc, char *argv[])
                                }
                        }
                }
-               config.dbbackend->cleanupdb();
+               dbctx->cleanupdb(dbctx);
                sock_close(fd);
                unlink(sockname);
        }