diff options
Diffstat (limited to 'source4/utils/smbcacls.c')
| -rw-r--r-- | source4/utils/smbcacls.c | 937 |
1 files changed, 937 insertions, 0 deletions
diff --git a/source4/utils/smbcacls.c b/source4/utils/smbcacls.c new file mode 100644 index 0000000000..4c85ea58c2 --- /dev/null +++ b/source4/utils/smbcacls.c @@ -0,0 +1,937 @@ +/* + Unix SMB/CIFS implementation. + ACL get/set utility + + Copyright (C) Andrew Tridgell 2000 + Copyright (C) Tim Potter 2000 + Copyright (C) Jeremy Allison 2000 + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + +static fstring password; +static pstring username; +static pstring owner_username; +static fstring server; +static int got_pass; +static int test_args; +static TALLOC_CTX *ctx; + +#define CREATE_ACCESS_READ READ_CONTROL_ACCESS +#define CREATE_ACCESS_WRITE (WRITE_DAC_ACCESS | WRITE_OWNER_ACCESS) + +/* numeric is set when the user wants numeric SIDs and ACEs rather + than going via LSA calls to resolve them */ +static int numeric; + +enum acl_mode {SMB_ACL_SET, SMB_ACL_DELETE, SMB_ACL_MODIFY, SMB_ACL_ADD }; +enum chown_mode {REQUEST_NONE, REQUEST_CHOWN, REQUEST_CHGRP}; +enum exit_values {EXIT_OK, EXIT_FAILED, EXIT_PARSE_ERROR}; + +struct perm_value { + const char *perm; + uint32 mask; +}; + +/* These values discovered by inspection */ + +static const struct perm_value special_values[] = { + { "R", 0x00120089 }, + { "W", 0x00120116 }, + { "X", 0x001200a0 }, + { "D", 0x00010000 }, + { "P", 0x00040000 }, + { "O", 0x00080000 }, + { NULL, 0 }, +}; + +static const struct perm_value standard_values[] = { + { "READ", 0x001200a9 }, + { "CHANGE", 0x001301bf }, + { "FULL", 0x001f01ff }, + { NULL, 0 }, +}; + +static struct cli_state *global_hack_cli; +static POLICY_HND pol; +static BOOL got_policy_hnd; + +static struct cli_state *connect_one(const char *share); + +/* Open cli connection and policy handle */ + +static BOOL cacls_open_policy_hnd(void) +{ + /* Initialise cli LSA connection */ + + if (!global_hack_cli) { + global_hack_cli = connect_one("IPC$"); + if (!cli_nt_session_open (global_hack_cli, PI_LSARPC)) { + return False; + } + } + + /* Open policy handle */ + + if (!got_policy_hnd) { + + /* Some systems don't support SEC_RIGHTS_MAXIMUM_ALLOWED, + but NT sends 0x2000000 so we might as well do it too. */ + + if (!NT_STATUS_IS_OK(cli_lsa_open_policy(global_hack_cli, global_hack_cli->mem_ctx, True, + GENERIC_EXECUTE_ACCESS, &pol))) { + return False; + } + + got_policy_hnd = True; + } + + return True; +} + +/* convert a SID to a string, either numeric or username/group */ +static void SidToString(fstring str, DOM_SID *sid) +{ + char **domains = NULL; + char **names = NULL; + uint32 *types = NULL; + + sid_to_string(str, sid); + + if (numeric) return; + + /* Ask LSA to convert the sid to a name */ + + if (!cacls_open_policy_hnd() || + !NT_STATUS_IS_OK(cli_lsa_lookup_sids(global_hack_cli, global_hack_cli->mem_ctx, + &pol, 1, sid, &domains, + &names, &types)) || + !domains || !domains[0] || !names || !names[0]) { + return; + } + + /* Converted OK */ + + slprintf(str, sizeof(fstring) - 1, "%s%s%s", + domains[0], lp_winbind_separator(), + names[0]); + +} + +/* convert a string to a SID, either numeric or username/group */ +static BOOL StringToSid(DOM_SID *sid, const char *str) +{ + uint32 *types = NULL; + DOM_SID *sids = NULL; + BOOL result = True; + + if (strncmp(str, "S-", 2) == 0) { + return string_to_sid(sid, str); + } + + if (!cacls_open_policy_hnd() || + !NT_STATUS_IS_OK(cli_lsa_lookup_names(global_hack_cli, global_hack_cli->mem_ctx, + &pol, 1, &str, &sids, + &types))) { + result = False; + goto done; + } + + sid_copy(sid, &sids[0]); + done: + + return result; +} + + +/* print an ACE on a FILE, using either numeric or ascii representation */ +static void print_ace(FILE *f, SEC_ACE *ace) +{ + const struct perm_value *v; + fstring sidstr; + int do_print = 0; + uint32 got_mask; + + SidToString(sidstr, &ace->trustee); + + fprintf(f, "%s:", sidstr); + + if (numeric) { + fprintf(f, "%d/%d/0x%08x", + ace->type, ace->flags, ace->info.mask); + return; + } + + /* Ace type */ + + if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED) { + fprintf(f, "ALLOWED"); + } else if (ace->type == SEC_ACE_TYPE_ACCESS_DENIED) { + fprintf(f, "DENIED"); + } else { + fprintf(f, "%d", ace->type); + } + + /* Not sure what flags can be set in a file ACL */ + + fprintf(f, "/%d/", ace->flags); + + /* Standard permissions */ + + for (v = standard_values; v->perm; v++) { + if (ace->info.mask == v->mask) { + fprintf(f, "%s", v->perm); + return; + } + } + + /* Special permissions. Print out a hex value if we have + leftover bits in the mask. */ + + got_mask = ace->info.mask; + + again: + for (v = special_values; v->perm; v++) { + if ((ace->info.mask & v->mask) == v->mask) { + if (do_print) { + fprintf(f, "%s", v->perm); + } + got_mask &= ~v->mask; + } + } + + if (!do_print) { + if (got_mask != 0) { + fprintf(f, "0x%08x", ace->info.mask); + } else { + do_print = 1; + goto again; + } + } +} + + +/* parse an ACE in the same format as print_ace() */ +static BOOL parse_ace(SEC_ACE *ace, char *str) +{ + char *p; + const char *cp; + fstring tok; + unsigned atype, aflags, amask; + DOM_SID sid; + SEC_ACCESS mask; + const struct perm_value *v; + + ZERO_STRUCTP(ace); + p = strchr_m(str,':'); + if (!p) return False; + *p = '\0'; + p++; + /* Try to parse numeric form */ + + if (sscanf(p, "%i/%i/%i", &atype, &aflags, &amask) == 3 && + StringToSid(&sid, str)) { + goto done; + } + + /* Try to parse text form */ + + if (!StringToSid(&sid, str)) { + return False; + } + + cp = p; + if (!next_token(&cp, tok, "/", sizeof(fstring))) { + return False; + } + + if (strncmp(tok, "ALLOWED", strlen("ALLOWED")) == 0) { + atype = SEC_ACE_TYPE_ACCESS_ALLOWED; + } else if (strncmp(tok, "DENIED", strlen("DENIED")) == 0) { + atype = SEC_ACE_TYPE_ACCESS_DENIED; + } else { + return False; + } + + /* Only numeric form accepted for flags at present */ + + if (!(next_token(&cp, tok, "/", sizeof(fstring)) && + sscanf(tok, "%i", &aflags))) { + return False; + } + + if (!next_token(&cp, tok, "/", sizeof(fstring))) { + return False; + } + + if (strncmp(tok, "0x", 2) == 0) { + if (sscanf(tok, "%i", &amask) != 1) { + return False; + } + goto done; + } + + for (v = standard_values; v->perm; v++) { + if (strcmp(tok, v->perm) == 0) { + amask = v->mask; + goto done; + } + } + + p = tok; + + while(*p) { + BOOL found = False; + + for (v = special_values; v->perm; v++) { + if (v->perm[0] == *p) { + amask |= v->mask; + found = True; + } + } + + if (!found) return False; + p++; + } + + if (*p) { + return False; + } + + done: + mask.mask = amask; + init_sec_ace(ace, &sid, atype, mask, aflags); + return True; +} + +/* add an ACE to a list of ACEs in a SEC_ACL */ +static BOOL add_ace(SEC_ACL **the_acl, SEC_ACE *ace) +{ + SEC_ACL *new; + SEC_ACE *aces; + if (! *the_acl) { + (*the_acl) = make_sec_acl(ctx, 3, 1, ace); + return True; + } + + aces = calloc(1+(*the_acl)->num_aces,sizeof(SEC_ACE)); + memcpy(aces, (*the_acl)->ace, (*the_acl)->num_aces * sizeof(SEC_ACE)); + memcpy(aces+(*the_acl)->num_aces, ace, sizeof(SEC_ACE)); + new = make_sec_acl(ctx,(*the_acl)->revision,1+(*the_acl)->num_aces, aces); + SAFE_FREE(aces); + (*the_acl) = new; + return True; +} + +/* parse a ascii version of a security descriptor */ +static SEC_DESC *sec_desc_parse(char *str) +{ + const char *p = str; + fstring tok; + SEC_DESC *ret; + size_t sd_size; + DOM_SID *grp_sid=NULL, *owner_sid=NULL; + SEC_ACL *dacl=NULL; + int revision=1; + + while (next_token(&p, tok, "\t,\r\n", sizeof(tok))) { + + if (strncmp(tok,"REVISION:", 9) == 0) { + revision = strtol(tok+9, NULL, 16); + continue; + } + + if (strncmp(tok,"OWNER:", 6) == 0) { + owner_sid = (DOM_SID *)calloc(1, sizeof(DOM_SID)); + if (!owner_sid || + !StringToSid(owner_sid, tok+6)) { + printf("Failed to parse owner sid\n"); + return NULL; + } + continue; + } + + if (strncmp(tok,"GROUP:", 6) == 0) { + grp_sid = (DOM_SID *)calloc(1, sizeof(DOM_SID)); + if (!grp_sid || + !StringToSid(grp_sid, tok+6)) { + printf("Failed to parse group sid\n"); + return NULL; + } + continue; + } + + if (strncmp(tok,"ACL:", 4) == 0) { + SEC_ACE ace; + if (!parse_ace(&ace, tok+4)) { + printf("Failed to parse ACL %s\n", tok); + return NULL; + } + if(!add_ace(&dacl, &ace)) { + printf("Failed to add ACL %s\n", tok); + return NULL; + } + continue; + } + + printf("Failed to parse security descriptor\n"); + return NULL; + } + + ret = make_sec_desc(ctx,revision, owner_sid, grp_sid, + NULL, dacl, &sd_size); + + SAFE_FREE(grp_sid); + SAFE_FREE(owner_sid); + + return ret; +} + + +/* print a ascii version of a security descriptor on a FILE handle */ +static void sec_desc_print(FILE *f, SEC_DESC *sd) +{ + fstring sidstr; + uint32 i; + + printf("REVISION:%d\n", sd->revision); + + /* Print owner and group sid */ + + if (sd->owner_sid) { + SidToString(sidstr, sd->owner_sid); + } else { + fstrcpy(sidstr, ""); + } + + printf("OWNER:%s\n", sidstr); + + if (sd->grp_sid) { + SidToString(sidstr, sd->grp_sid); + } else { + fstrcpy(sidstr, ""); + } + + fprintf(f, "GROUP:%s\n", sidstr); + + /* Print aces */ + for (i = 0; sd->dacl && i < sd->dacl->num_aces; i++) { + SEC_ACE *ace = &sd->dacl->ace[i]; + fprintf(f, "ACL:"); + print_ace(f, ace); + fprintf(f, "\n"); + } + +} + +/***************************************************** +dump the acls for a file +*******************************************************/ +static int cacl_dump(struct cli_state *cli, char *filename) +{ + int result = EXIT_FAILED; + int fnum = -1; + SEC_DESC *sd; + + if (test_args) + return EXIT_OK; + + fnum = cli_nt_create(cli, filename, CREATE_ACCESS_READ); + + if (fnum == -1) { + printf("Failed to open %s: %s\n", filename, cli_errstr(cli)); + goto done; + } + + sd = cli_query_secdesc(cli, fnum, ctx); + + if (!sd) { + printf("ERROR: secdesc query failed: %s\n", cli_errstr(cli)); + goto done; + } + + sec_desc_print(stdout, sd); + + result = EXIT_OK; + +done: + if (fnum != -1) + cli_close(cli, fnum); + + return result; +} + +/***************************************************** +Change the ownership or group ownership of a file. Just +because the NT docs say this can't be done :-). JRA. +*******************************************************/ + +static int owner_set(struct cli_state *cli, enum chown_mode change_mode, + char *filename, char *new_username) +{ + int fnum; + DOM_SID sid; + SEC_DESC *sd, *old; + size_t sd_size; + + fnum = cli_nt_create(cli, filename, CREATE_ACCESS_READ); + + if (fnum == -1) { + printf("Failed to open %s: %s\n", filename, cli_errstr(cli)); + return EXIT_FAILED; + } + + if (!StringToSid(&sid, new_username)) + return EXIT_PARSE_ERROR; + + old = cli_query_secdesc(cli, fnum, ctx); + + cli_close(cli, fnum); + + if (!old) { + printf("owner_set: Failed to query old descriptor\n"); + return EXIT_FAILED; + } + + sd = make_sec_desc(ctx,old->revision, + (change_mode == REQUEST_CHOWN) ? &sid : old->owner_sid, + (change_mode == REQUEST_CHGRP) ? &sid : old->grp_sid, + NULL, old->dacl, &sd_size); + + fnum = cli_nt_create(cli, filename, CREATE_ACCESS_WRITE); + + if (fnum == -1) { + printf("Failed to open %s: %s\n", filename, cli_errstr(cli)); + return EXIT_FAILED; + } + + if (!cli_set_secdesc(cli, fnum, sd)) { + printf("ERROR: secdesc set failed: %s\n", cli_errstr(cli)); + } + + cli_close(cli, fnum); + + return EXIT_OK; +} + + +/* The MSDN is contradictory over the ordering of ACE entries in an ACL. + However NT4 gives a "The information may have been modified by a + computer running Windows NT 5.0" if denied ACEs do not appear before + allowed ACEs. */ + +static int ace_compare(SEC_ACE *ace1, SEC_ACE *ace2) +{ + if (sec_ace_equal(ace1, ace2)) + return 0; + + if (ace1->type != ace2->type) + return ace2->type - ace1->type; + + if (sid_compare(&ace1->trustee, &ace2->trustee)) + return sid_compare(&ace1->trustee, &ace2->trustee); + + if (ace1->flags != ace2->flags) + return ace1->flags - ace2->flags; + + if (ace1->info.mask != ace2->info.mask) + return ace1->info.mask - ace2->info.mask; + + if (ace1->size != ace2->size) + return ace1->size - ace2->size; + + return memcmp(ace1, ace2, sizeof(SEC_ACE)); +} + +static void sort_acl(SEC_ACL *the_acl) +{ + uint32 i; + if (!the_acl) return; + + qsort(the_acl->ace, the_acl->num_aces, sizeof(the_acl->ace[0]), QSORT_CAST ace_compare); + + for (i=1;i<the_acl->num_aces;) { + if (sec_ace_equal(&the_acl->ace[i-1], &the_acl->ace[i])) { + int j; + for (j=i; j<the_acl->num_aces-1; j++) { + the_acl->ace[j] = the_acl->ace[j+1]; + } + the_acl->num_aces--; + } else { + i++; + } + } +} + +/***************************************************** +set the ACLs on a file given an ascii description +*******************************************************/ +static int cacl_set(struct cli_state *cli, char *filename, + char *the_acl, enum acl_mode mode) +{ + int fnum; + SEC_DESC *sd, *old; + uint32 i, j; + size_t sd_size; + int result = EXIT_OK; + + sd = sec_desc_parse(the_acl); + + if (!sd) return EXIT_PARSE_ERROR; + if (test_args) return EXIT_OK; + + /* The desired access below is the only one I could find that works + with NT4, W2KP and Samba */ + + fnum = cli_nt_create(cli, filename, CREATE_ACCESS_READ); + + if (fnum == -1) { + printf("cacl_set failed to open %s: %s\n", filename, cli_errstr(cli)); + return EXIT_FAILED; + } + + old = cli_query_secdesc(cli, fnum, ctx); + + if (!old) { + printf("calc_set: Failed to query old descriptor\n"); + return EXIT_FAILED; + } + + cli_close(cli, fnum); + + /* the logic here is rather more complex than I would like */ + switch (mode) { + case SMB_ACL_DELETE: + for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) { + BOOL found = False; + + for (j=0;old->dacl && j<old->dacl->num_aces;j++) { + if (sec_ace_equal(&sd->dacl->ace[i], + &old->dacl->ace[j])) { + uint32 k; + for (k=j; k<old->dacl->num_aces-1;k++) { + old->dacl->ace[k] = old->dacl->ace[k+1]; + } + old->dacl->num_aces--; + if (old->dacl->num_aces == 0) { + SAFE_FREE(old->dacl->ace); + SAFE_FREE(old->dacl); + old->off_dacl = 0; + } + found = True; + break; + } + } + + if (!found) { + printf("ACL for ACE:"); + print_ace(stdout, &sd->dacl->ace[i]); + printf(" not found\n"); + } + } + break; + + case SMB_ACL_MODIFY: + for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) { + BOOL found = False; + + for (j=0;old->dacl && j<old->dacl->num_aces;j++) { + if (sid_equal(&sd->dacl->ace[i].trustee, + &old->dacl->ace[j].trustee)) { + old->dacl->ace[j] = sd->dacl->ace[i]; + found = True; + } + } + + if (!found) { + fstring str; + + SidToString(str, &sd->dacl->ace[i].trustee); + printf("ACL for SID %s not found\n", str); + } + } + + break; + + case SMB_ACL_ADD: + for (i=0;sd->dacl && i<sd->dacl->num_aces;i++) { + add_ace(&old->dacl, &sd->dacl->ace[i]); + } + break; + + case SMB_ACL_SET: + old = sd; + break; + } + + /* Denied ACE entries must come before allowed ones */ + sort_acl(old->dacl); + + /* Create new security descriptor and set it */ + sd = make_sec_desc(ctx,old->revision, old->owner_sid, old->grp_sid, + NULL, old->dacl, &sd_size); + + fnum = cli_nt_create(cli, filename, CREATE_ACCESS_WRITE); + + if (fnum == -1) { + printf("cacl_set failed to open %s: %s\n", filename, cli_errstr(cli)); + return EXIT_FAILED; + } + + if (!cli_set_secdesc(cli, fnum, sd)) { + printf("ERROR: secdesc set failed: %s\n", cli_errstr(cli)); + result = EXIT_FAILED; + } + + /* Clean up */ + + cli_close(cli, fnum); + + return result; +} + + +/***************************************************** +return a connection to a server +*******************************************************/ +static struct cli_state *connect_one(const char *share) +{ + struct cli_state *c; + struct in_addr ip; + NTSTATUS nt_status; + zero_ip(&ip); + + if (!got_pass) { + char *pass = getpass("Password: "); + if (pass) { + fstrcpy(password, pass); + got_pass = True; + } + } + + if (NT_STATUS_IS_OK(nt_status = cli_full_connection(&c, lp_netbios_name(), server, + &ip, 0, + share, "?????", + username, lp_workgroup(), + password, 0, NULL))) { + return c; + } else { + DEBUG(0,("cli_full_connection failed! (%s)\n", nt_errstr(nt_status))); + return NULL; + } +} + + +static void usage(void) +{ + printf( +"Usage: smbcacls //server1/share1 filename [options]\n\ +\n\ +\t-D <acls> delete an acl\n\ +\t-M <acls> modify an acl\n\ +\t-A <acls> add an acl\n\ +\t-S <acls> set acls\n\ +\t-C username change ownership of a file\n\ +\t-G username change group ownership of a file\n\ +\t-n don't resolve sids or masks to names\n\ +\t-h print help\n\ +\t-d debuglevel set debug output level\n\ +\t-U username user to autheticate as\n\ +\n\ +The username can be of the form username%%password or\n\ +workgroup\\username%%password.\n\n\ +An acl is of the form ACL:<SID>:type/flags/mask\n\ +You can string acls together with spaces, commas or newlines\n\ +"); +} + +/**************************************************************************** + main program +****************************************************************************/ + int main(int argc,char *argv[]) +{ + char *share; + pstring filename; + extern char *optarg; + extern int optind; + int opt; + char *p; + enum acl_mode mode = SMB_ACL_SET; + char *the_acl = NULL; + enum chown_mode change_mode = REQUEST_NONE; + int result; + + struct cli_state *cli; + + ctx=talloc_init("main"); + + setlinebuf(stdout); + + dbf = x_stderr; + + if (argc < 3 || argv[1][0] == '-') { + usage(); + talloc_destroy(ctx); + exit(EXIT_PARSE_ERROR); + } + + setup_logging(argv[0],True); + + share = argv[1]; + pstrcpy(filename, argv[2]); + all_string_sub(share,"/","\\",0); + + argc -= 2; + argv += 2; + + lp_load(dyn_CONFIGFILE,True,False,False); + load_interfaces(); + + if (getenv("USER")) { + pstrcpy(username,getenv("USER")); + + if ((p=strchr_m(username,'%'))) { + *p = 0; + fstrcpy(password,p+1); + got_pass = True; + memset(strchr_m(getenv("USER"), '%') + 1, 'X', + strlen(password)); + } + } + + while ((opt = getopt(argc, argv, "U:nhS:D:A:M:C:G:td:")) != EOF) { + switch (opt) { + case 'U': + pstrcpy(username,optarg); + p = strchr_m(username,'%'); + if (p) { + *p = 0; + fstrcpy(password, p+1); + got_pass = 1; + } + break; + + case 'S': + the_acl = optarg; + mode = SMB_ACL_SET; + break; + + case 'D': + the_acl = optarg; + mode = SMB_ACL_DELETE; + break; + + case 'M': + the_acl = optarg; + mode = SMB_ACL_MODIFY; + break; + + case 'A': + the_acl = optarg; + mode = SMB_ACL_ADD; + break; + + case 'C': + pstrcpy(owner_username,optarg); + change_mode = REQUEST_CHOWN; + break; + + case 'G': + pstrcpy(owner_username,optarg); + change_mode = REQUEST_CHGRP; + break; + + case 'n': + numeric = 1; + break; + + case 't': + test_args = 1; + break; + + case 'h': + usage(); + talloc_destroy(ctx); + exit(EXIT_PARSE_ERROR); + + case 'd': + DEBUGLEVEL = atoi(optarg); + break; + + default: + printf("Unknown option %c (%d)\n", (char)opt, opt); + talloc_destroy(ctx); + exit(EXIT_PARSE_ERROR); + } + } + + argc -= optind; + argv += optind; + + if (argc > 0) { + usage(); + talloc_destroy(ctx); + exit(EXIT_PARSE_ERROR); + } + + /* Make connection to server */ + + fstrcpy(server,share+2); + share = strchr_m(server,'\\'); + if (!share) { + share = strchr_m(server,'/'); + if (!share) { + return -1; + } + } + + *share = 0; + share++; + + if (!test_args) { + cli = connect_one(share); + if (!cli) { + talloc_destroy(ctx); + exit(EXIT_FAILED); + } + } else { + exit(0); + } + + all_string_sub(filename, "/", "\\", 0); + if (filename[0] != '\\') { + pstring s; + s[0] = '\\'; + safe_strcpy(&s[1], filename, sizeof(pstring)-1); + pstrcpy(filename, s); + } + + /* Perform requested action */ + + if (change_mode != REQUEST_NONE) { + result = owner_set(cli, change_mode, filename, owner_username); + } else if (the_acl) { + result = cacl_set(cli, filename, the_acl, mode); + } else { + result = cacl_dump(cli, filename); + } + + talloc_destroy(ctx); + + return result; +} + |