X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libatalk%2Facl%2Fuuid.c;h=7d6e7d620cf6ad0aaf554c814c9b0774e0ccc3d4;hb=b3c52ea7097b09cafe6002acca2c996f1f5ea2fb;hp=72c70c6f4124ef27d1df1b47db165fb850ef3b5a;hpb=4cf85f5e7452981f73557f65b5d646acd5460789;p=netatalk.git diff --git a/libatalk/acl/uuid.c b/libatalk/acl/uuid.c index 72c70c6f..7d6e7d62 100644 --- a/libatalk/acl/uuid.c +++ b/libatalk/acl/uuid.c @@ -1,17 +1,16 @@ /* - $Id: uuid.c,v 1.3 2009-11-27 16:33:49 franklahm Exp $ - Copyright (c) 2008,2009 Frank Lahm - - 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. - */ + Copyright (c) 2008,2009 Frank Lahm + + 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. +*/ #ifdef HAVE_CONFIG_H #include "config.h" @@ -21,130 +20,282 @@ #include #include #include +#include +#include +#include +#include +#include #include #include #include +#include +#include #include "aclldap.h" #include "cache.h" -char *uuidtype[] = {"NULL","USER", "GROUP"}; +char *uuidtype[] = {"", "USER", "GROUP", "LOCAL"}; /******************************************************** * Public helper function ********************************************************/ -void uuid_string2bin( const char *uuidstring, uuidp_t uuid) { +static unsigned char local_group_uuid[] = {0xab, 0xcd, 0xef, + 0xab, 0xcd, 0xef, + 0xab, 0xcd, 0xef, + 0xab, 0xcd, 0xef}; + +static unsigned char local_user_uuid[] = {0xff, 0xff, 0xee, 0xee, 0xdd, 0xdd, + 0xcc, 0xcc, 0xbb, 0xbb, 0xaa, 0xaa}; + +void localuuid_from_id(unsigned char *buf, uuidtype_t type, unsigned int id) +{ + uint32_t tmp; + + switch (type) { + case UUID_GROUP: + memcpy(buf, local_group_uuid, 12); + break; + case UUID_USER: + default: + memcpy(buf, local_user_uuid, 12); + break; + } + + tmp = htonl(id); + memcpy(buf + 12, &tmp, 4); + + return; +} + +/* + * convert ascii string that can include dashes to binary uuid. + * caller must provide a buffer. + */ +void uuid_string2bin( const char *uuidstring, unsigned char *uuid) { int nibble = 1; int i = 0; unsigned char c, val = 0; + + while (*uuidstring && i < UUID_BINSIZE) { + c = *uuidstring; + if (c == '-') { + uuidstring++; + continue; + } + else if (c <= '9') /* 0-9 */ + c -= '0'; + else if (c <= 'F') /* A-F */ + c -= 'A' - 10; + else if (c <= 'f') /* a-f */ + c-= 'a' - 10; + + if (nibble) + val = c * 16; + else + uuid[i++] = val + c; - while (*uuidstring) { - c = *uuidstring; - if (c == '-') { - uuidstring++; - continue; - } - else if (c <= '9') /* 0-9 */ - c -= '0'; - else if (c <= 'F') /* A-F */ - c -= 'A' - 10; - else if (c <= 'f') /* a-f */ - c-= 'a' - 10; - - if (nibble) - val = c * 16; - else - uuid[i++] = val + c; - - nibble ^= 1; - uuidstring++; + nibble ^= 1; + uuidstring++; } } -int uuid_bin2string( uuidp_t uuid, char **uuidstring) { - char ascii[16] = { "0123456789ABCDEF" }; - int nibble = 1; +/*! + * Convert 16 byte binary uuid to neat ascii represantation including dashes. + * Use defined or default ascii mask for dash placement + * Returns pointer to static buffer. + */ +const char *uuid_bin2string(const unsigned char *uuid) { + static char uuidstring[64]; + const char *uuidmask; int i = 0; unsigned char c; - char *s; - *uuidstring = calloc(1, UUID_STRINGSIZE + 1); - if (*uuidstring == NULL) { - LOG(log_error, logtype_default, "uuid_bin2string: %s: error calloc'ing",strerror(errno)); - return -1; - } - s = *uuidstring; - - while (i < UUID_STRINGSIZE) { - c = *uuid; - if (nibble) - c = c >> 4; - else { - c &= 0x0f; - uuid++; - } - s[i] = ascii[c]; - nibble ^= 1; - i++; - if (i==8 || i==13 || i==18 || i==23) - s[i++] = '-'; +#ifdef HAVE_LDAP + if (ldap_uuid_string) + uuidmask = ldap_uuid_string; + else +#endif + uuidmask = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"; + + LOG(log_debug, logtype_afpd, "uuid_bin2string{uuid}: mask: %s", uuidmask); + + while (i < strlen(uuidmask)) { + c = *uuid; + uuid++; + sprintf(uuidstring + i, "%02X", c); + i += 2; + if (uuidmask[i] == '-') + uuidstring[i++] = '-'; } - return 0; + uuidstring[i] = 0; + return uuidstring; } -/******************************************************** +/******************************************************** * Interface ********************************************************/ -int getuuidfromname( const char *name, uuidtype_t type, uuidp_t uuid) { +/* + * name: give me his name + * type: and type (UUID_USER or UUID_GROUP) + * uuid: pointer to uuid_t storage that the caller must provide + * returns 0 on success !=0 on errror + */ +int getuuidfromname( const char *name, uuidtype_t type, unsigned char *uuid) { int ret = 0; + uuidtype_t mytype = type; + char nulluuid[16] = {0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0}; +#ifdef HAVE_LDAP char *uuid_string = NULL; +#endif + + ret = search_cachebyname(name, &mytype, uuid); - ret = search_cachebyname( name, type, uuid); - if (ret == 0) { /* found in cache */ - uuid_bin2string( uuid, &uuid_string); - LOG(log_debug, logtype_afpd, "getuuidfromname{cache}: name: %s, type: %s -> UUID: %s",name, uuidtype[type], uuid_string); - } else { /* if not found in cache */ - ret = ldap_getuuidfromname( name, type, &uuid_string); - if (ret != 0) { - LOG(log_error, logtype_afpd, "getuuidfromname: no result from ldap_getuuidfromname"); - goto cleanup; - } - uuid_string2bin( uuid_string, uuid); - add_cachebyname( name, uuid, type, 0); - LOG(log_debug, logtype_afpd, "getuuidfromname{LDAP}: name: %s, type: %s -> UUID: %s",name, uuidtype[type], uuid_string); + if (ret == 0) { + /* found in cache */ + LOG(log_debug, logtype_afpd, + "getuuidfromname{cache}: name: %s, type%s: %s -> UUID: %s", + name, + (mytype & UUID_ENOENT) == UUID_ENOENT ? "[negative]" : "", + uuidtype[type & UUIDTYPESTR_MASK], + uuid_bin2string(uuid)); + if ((mytype & UUID_ENOENT) == UUID_ENOENT) + return -1; + } else { + /* if not found in cache */ +#ifdef HAVE_LDAP + if ((ret = ldap_getuuidfromname( name, type, &uuid_string)) == 0) { + uuid_string2bin( uuid_string, uuid); + LOG(log_debug, logtype_afpd, "getuuidfromname{LDAP}: name: %s, type: %s -> UUID: %s", + name, uuidtype[type & UUIDTYPESTR_MASK], uuid_bin2string(uuid)); + } else { + LOG(log_debug, logtype_afpd, "getuuidfromname(\"%s\",t:%u): no result from ldap search", + name, type); + } +#endif + if (ret != 0) { + /* Build a local UUID */ + if (type == UUID_USER) { + struct passwd *pwd; + if ((pwd = getpwnam(name)) == NULL) { + LOG(log_error, logtype_afpd, "getuuidfromname(\"%s\",t:%u): unknown user", + name, uuidtype[type & UUIDTYPESTR_MASK]); + mytype |= UUID_ENOENT; + memcpy(uuid, nulluuid, 16); + } else { + localuuid_from_id(uuid, UUID_USER, pwd->pw_uid); + ret = 0; + LOG(log_debug, logtype_afpd, "getuuidfromname{local}: name: %s, type: %s -> UUID: %s", + name, uuidtype[type & UUIDTYPESTR_MASK], uuid_bin2string(uuid)); + } + } else { + struct group *grp; + if ((grp = getgrnam(name)) == NULL) { + LOG(log_error, logtype_afpd, "getuuidfromname(\"%s\",t:%u): unknown user", + name, uuidtype[type & UUIDTYPESTR_MASK]); + mytype |= UUID_ENOENT; + memcpy(uuid, nulluuid, 16); + } else { + localuuid_from_id(uuid, UUID_GROUP, grp->gr_gid); + ret = 0; + LOG(log_debug, logtype_afpd, "getuuidfromname{local}: name: %s, type: %s -> UUID: %s", + name, uuidtype[type & UUIDTYPESTR_MASK], uuid_bin2string(uuid)); + } + } + } + add_cachebyname(name, uuid, mytype, 0); } cleanup: - free(uuid_string); +#ifdef HAVE_LDAP + if (uuid_string) free(uuid_string); +#endif return ret; } -int getnamefromuuid( uuidp_t uuidp, char **name, uuidtype_t *type) { + +/* + * uuidp: pointer to a uuid + * name: returns allocated buffer from ldap_getnamefromuuid + * type: returns USER, GROUP or LOCAL + * return 0 on success !=0 on errror + * + * Caller must free name appropiately. + */ +int getnamefromuuid(const uuidp_t uuidp, char **name, uuidtype_t *type) { int ret; - char *uuid_string = NULL; - - ret = search_cachebyuuid( uuidp, name, type); - if (ret == 0) { /* found in cache */ -#ifdef DEBUG - uuid_bin2string( uuidp, &uuid_string); - LOG(log_debug9, logtype_afpd, "getnamefromuuid{cache}: UUID: %s -> name: %s, type:%s", uuid_string, *name, uuidtype[*type]); + uid_t uid; + gid_t gid; + struct passwd *pwd; + struct group *grp; + + if (search_cachebyuuid(uuidp, name, type) == 0) { + /* found in cache */ + LOG(log_debug, logtype_afpd, + "getnamefromuuid{cache}: UUID: %s -> name: %s, type%s: %s", + uuid_bin2string(uuidp), + *name, + (*type & UUID_ENOENT) == UUID_ENOENT ? "[negative]" : "", + uuidtype[(*type) & UUIDTYPESTR_MASK]); + if ((*type & UUID_ENOENT) == UUID_ENOENT) + return -1; + return 0; + } + + /* not found in cache */ + + /* Check if UUID is a client local one */ + if (memcmp(uuidp, local_user_uuid, 12) == 0) { + *type = UUID_USER; + uid = ntohl(*(uint32_t *)(uuidp + 12)); + if ((pwd = getpwuid(uid)) == NULL) { + /* not found, add negative entry to cache */ + add_cachebyuuid(uuidp, "UUID_ENOENT", UUID_ENOENT, 0); + ret = -1; + } else { + *name = strdup(pwd->pw_name); + add_cachebyuuid(uuidp, *name, *type, 0); + ret = 0; + } + LOG(log_debug, logtype_afpd, + "getnamefromuuid{local}: UUID: %s -> name: %s, type:%s", + uuid_bin2string(uuidp), *name, uuidtype[(*type) & UUIDTYPESTR_MASK]); + return ret; + } else if (memcmp(uuidp, local_group_uuid, 12) == 0) { + *type = UUID_GROUP; + gid = ntohl(*(uint32_t *)(uuidp + 12)); + if ((grp = getgrgid(gid)) == NULL) { + /* not found, add negative entry to cache */ + add_cachebyuuid(uuidp, "UUID_ENOENT", UUID_ENOENT, 0); + ret = -1; + } else { + *name = strdup(grp->gr_name); + add_cachebyuuid(uuidp, *name, *type, 0); + ret = 0; + } + return ret; + } + +#ifdef HAVE_LDAP + ret = ldap_getnamefromuuid(uuid_bin2string(uuidp), name, type); +#else + ret = -1; #endif - } else { /* if not found in cache */ - uuid_bin2string( uuidp, &uuid_string); - ret = ldap_getnamefromuuid( uuid_string, name, type); - if (ret != 0) { - LOG(log_error, logtype_afpd, "getnamefromuuid: no result from ldap_getuuidfromname"); - goto cleanup; - } - add_cachebyuuid( uuidp, *name, *type, 0); - LOG(log_debug, logtype_afpd, "getnamefromuuid{LDAP}: UUID: %s -> name: %s, type:%s",uuid_string, *name, uuidtype[*type]); + + if (ret != 0) { + LOG(log_debug, logtype_afpd, "getnamefromuuid(%s): not found", + uuid_bin2string(uuidp)); + add_cachebyuuid(uuidp, "UUID_ENOENT", UUID_ENOENT, 0); + return -1; } -cleanup: - free(uuid_string); - return ret; + add_cachebyuuid(uuidp, *name, *type, 0); + + LOG(log_debug, logtype_afpd, "getnamefromuuid{LDAP}: UUID: %s -> name: %s, type:%s", + uuid_bin2string(uuidp), *name, uuidtype[(*type) & UUIDTYPESTR_MASK]); + + return 0; }