>From 455334c250b9daba50ffb9fa70531523c65a25bb Mon Sep 17 00:00:00 2001 From: Jakub Hrozek Date: Wed, 1 Aug 2012 18:28:04 +0200 Subject: [PATCH] Create a domain-realm mapping for krb5.conf to be included When new subdomains are discovered, the SSSD creates a file that includes the domain-realm mappings. This file can in turn be included in the krb5.conf using the includedir directive, such as: includedir /var/lib/sss/pubconf/realm_mappings --- Makefile.am | 1 + src/providers/ipa/ipa_subdomains.c | 118 ++++++++++++++++++++++++++++++++++++ 2 files changed, 119 insertions(+) diff --git a/Makefile.am b/Makefile.am index 71d4db710023c8419584bb63a923bb4b0eacf3b8..abac262b6c0d9ce978f6a8f9c9ba0fe3d2b8d121 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1594,6 +1594,7 @@ installsssddirs:: $(DESTDIR)$(pidpath) \ $(DESTDIR)$(logpath) \ $(DESTDIR)$(pubconfpath) \ + $(DESTDIR)$(pubconfpath)/realm_mappings \ $(DESTDIR)$(sudolibdir) \ $(DESTDIR)$(autofslibdir) diff --git a/src/providers/ipa/ipa_subdomains.c b/src/providers/ipa/ipa_subdomains.c index fd6b6e43c311ac8365852186f4788e3907f41d62..aea4f60026576015a44020134e7803f1914c5e0e 100644 --- a/src/providers/ipa/ipa_subdomains.c +++ b/src/providers/ipa/ipa_subdomains.c @@ -48,6 +48,9 @@ /* refresh automatically every 4 hours */ #define IPA_SUBDOMAIN_REFRESH_PERIOD (3600 * 4) +/* the directory domain - realm mappings are written to */ +#define IPA_SUBDOMAIN_MAPPING_DIR PUBCONF_PATH"/realm_mappings" + enum ipa_subdomains_req_type { IPA_SUBDOMAINS_MASTER, IPA_SUBDOMAINS_SLAVE, @@ -271,6 +274,112 @@ static errno_t ipa_subdom_parse(TALLOC_CTX *memctx, return EOK; } +static errno_t +ipa_subdomains_write_mappings(struct sss_domain_info *domain, + size_t num_subdoms, + struct sysdb_subdom *subdoms) +{ + errno_t ret; + TALLOC_CTX *tmp_ctx; + const char *mapping_file; + char *tmp_file = NULL; + mode_t oldmask; + int fd = -1; + char *content; + size_t content_len; + size_t i; + ssize_t written; + + tmp_ctx = talloc_new(NULL); + if (!tmp_ctx) return ENOMEM; + + mapping_file = talloc_asprintf(tmp_ctx, "%s/domain_realm_%s", + IPA_SUBDOMAIN_MAPPING_DIR, domain->name); + if (!mapping_file) { + ret = ENOMEM; + goto done; + } + + tmp_file = talloc_asprintf(tmp_ctx, "%sXXXXXX", mapping_file); + if (tmp_file == NULL) { + ret = ENOMEM; + goto done; + } + + content = talloc_zero(tmp_ctx, char); + if (!content) { + ret = ENOMEM; + goto done; + } + + for (i=0; i < num_subdoms; i++) { + content = talloc_asprintf_append(content, ".%s = %s\n%s = %s\n", + subdoms[i].name, subdoms[i].realm, + subdoms[i].name, subdoms[i].realm); + if (!content) { + ret = ENOMEM; + goto done; + } + } + content_len = strlen(content) + 1; + + oldmask = umask(022); + fd = mkstemp(tmp_file); + umask(oldmask); + if (fd < 0) { + DEBUG(SSSDBG_OP_FAILURE, ("creating the temp file [%s] for domain-realm " + "mappings failed.", tmp_file)); + ret = EIO; + goto done; + } + + errno = 0; + written = sss_atomic_write_s(fd, content, content_len); + if (written == -1) { + ret = errno; + DEBUG(SSSDBG_CRIT_FAILURE, + ("write failed [%d][%s].\n", ret, strerror(ret))); + goto done; + } + + if (written != content_len) { + DEBUG(SSSDBG_CRIT_FAILURE, + ("Write error, wrote [%d] bytes, expected [%d]\n", + written, content_len)); + ret = EIO; + goto done; + } + + ret = close(fd); + if (ret == -1) { + ret = errno; + DEBUG(SSSDBG_CRIT_FAILURE, + ("close failed [%d][%s].\n", ret, strerror(ret))); + goto done; + } + fd = -1; + + ret = rename(tmp_file, mapping_file); + if (ret == -1) { + ret = errno; + DEBUG(SSSDBG_CRIT_FAILURE, + ("rename failed [%d][%s].\n", ret, strerror(ret))); + goto done; + } + + ret = EOK; +done: + if (fd > -1) { + ret = unlink(tmp_file); + if (ret < 0) { + DEBUG(SSSDBG_MINOR_FAILURE, ("Could not remove file [%s]", + tmp_file)); + } + } + talloc_free(tmp_ctx); + return ret; +} + static errno_t ipa_subdomains_refresh(struct ipa_subdomains_ctx *ctx, int count, struct sysdb_attrs **reply, bool *changes) @@ -598,6 +707,15 @@ static void ipa_subdomains_handler_done(struct tevent_req *req) DEBUG(SSSDBG_OP_FAILURE, ("sysdb_update_subdomains failed.\n")); goto done; } + + ret = ipa_subdomains_write_mappings(sysdb_ctx_get_domain(sysdb), + ctx->sd_ctx->num_subdoms, + ctx->sd_ctx->subdoms); + if (ret != EOK) { + DEBUG(SSSDBG_OP_FAILURE, + ("ipa_subdomains_write_mappings failed.\n")); + goto done; + } } -- 1.7.10.4