diff -up openssh-6.8p1/sftp-server.8.sftp-force-mode openssh-6.8p1/sftp-server.8 --- openssh-6.8p1/sftp-server.8.sftp-force-mode 2015-03-17 06:49:20.000000000 +0100 +++ openssh-6.8p1/sftp-server.8 2015-03-18 13:18:05.898306477 +0100 @@ -38,6 +38,7 @@ .Op Fl P Ar blacklisted_requests .Op Fl p Ar whitelisted_requests .Op Fl u Ar umask +.Op Fl m Ar force_file_perms .Ek .Nm .Fl Q Ar protocol_feature @@ -138,6 +139,10 @@ Sets an explicit .Xr umask 2 to be applied to newly-created files and directories, instead of the user's default mask. +.It Fl m Ar force_file_perms +Sets explicit file permissions to be applied to newly-created files instead +of the default or client requested mode. Numeric values include: +777, 755, 750, 666, 644, 640, etc. Option -u is ineffective if -m is set. .El .Pp On some systems, diff -up openssh-6.8p1/sftp-server.c.sftp-force-mode openssh-6.8p1/sftp-server.c --- openssh-6.8p1/sftp-server.c.sftp-force-mode 2015-03-18 13:18:05.883306513 +0100 +++ openssh-6.8p1/sftp-server.c 2015-03-18 13:18:36.697232193 +0100 @@ -70,6 +70,10 @@ struct sshbuf *oqueue; /* Version of client */ static u_int version; +/* Force file permissions */ +int permforce = 0; +long permforcemode; + /* SSH2_FXP_INIT received */ static int init_done; @@ -693,6 +697,10 @@ process_open(u_int32_t id) debug3("request %u: open flags %d", id, pflags); flags = flags_from_portable(pflags); mode = (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a.perm : 0666; + if (permforce == 1) { /* Force perm if -m is set */ + mode = permforcemode; + (void)umask(0); /* so umask does not interfere */ + } logit("open \"%s\" flags %s mode 0%o", name, string_from_portable(pflags), mode); if (readonly && @@ -1495,7 +1503,7 @@ sftp_server_usage(void) fprintf(stderr, "usage: %s [-ehR] [-d start_directory] [-f log_facility] " "[-l log_level]\n\t[-P blacklisted_requests] " - "[-p whitelisted_requests] [-u umask]\n" + "[-p whitelisted_requests] [-u umask] [-m force_file_perms]\n" " %s -Q protocol_feature\n", __progname, __progname); exit(1); @@ -1520,7 +1528,7 @@ sftp_server_main(int argc, char **argv, pw = pwcopy(user_pw); while (!skipargs && (ch = getopt(argc, argv, - "d:f:l:P:p:Q:u:cehR")) != -1) { + "d:f:l:P:p:Q:u:m:cehR")) != -1) { switch (ch) { case 'Q': if (strcasecmp(optarg, "requests") != 0) { @@ -1580,6 +1588,15 @@ sftp_server_main(int argc, char **argv, fatal("Invalid umask \"%s\"", optarg); (void)umask((mode_t)mask); break; + case 'm': + /* Force permissions on file received via sftp */ + permforce = 1; + permforcemode = strtol(optarg, &cp, 8); + if (permforcemode < 0 || permforcemode > 0777 || + *cp != '\0' || (permforcemode == 0 && + errno != 0)) + fatal("Invalid file mode \"%s\"", optarg); + break; case 'h': default: sftp_server_usage();