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-rw-r--r--src/external/pac_responder.m42
-rw-r--r--src/providers/krb5/krb5_child.c122
-rw-r--r--src/util/sss_krb5.c111
-rw-r--r--src/util/sss_krb5.h7
4 files changed, 138 insertions, 104 deletions
diff --git a/src/external/pac_responder.m4 b/src/external/pac_responder.m4
index 91c8263a..0aadd40b 100644
--- a/src/external/pac_responder.m4
+++ b/src/external/pac_responder.m4
@@ -30,3 +30,5 @@ then
fi
AM_CONDITIONAL([BUILD_PAC_RESPONDER], [test x$build_pac_responder = xyes -a x$ndr_krb5pac_ok = xyes -a x$krb5_version_ok = xyes ])
+AM_COND_IF([BUILD_PAC_RESPONDER],
+ [AC_DEFINE_UNQUOTED(HAVE_PAC_RESPONDER, 1, [Build with the PAC responder])])
diff --git a/src/providers/krb5/krb5_child.c b/src/providers/krb5/krb5_child.c
index e7776248..8a68f275 100644
--- a/src/providers/krb5/krb5_child.c
+++ b/src/providers/krb5/krb5_child.c
@@ -101,94 +101,12 @@ struct krb5_req {
static krb5_context krb5_error_ctx;
#define KRB5_CHILD_DEBUG(level, error) KRB5_DEBUG(level, krb5_error_ctx, error)
-static krb5_error_code extract_and_send_pac(struct krb5_req *kr,
- krb5_ccache ccache,
- krb5_principal server_principal,
- krb5_principal client_principal,
- krb5_keytab keytab)
+
+static errno_t sss_send_pac(krb5_authdata **pac_authdata)
{
- krb5_error_code kerr;
- krb5_creds mcred;
- krb5_creds cred;
- krb5_authdata **pac_authdata = NULL;
- krb5_pac pac = NULL;
struct sss_cli_req_data sss_data;
int ret;
int errnop;
- krb5_ticket *ticket = NULL;
- krb5_keytab_entry entry;
-
- memset(&entry, 0, sizeof(entry));
- memset(&mcred, 0, sizeof(mcred));
- memset(&cred, 0, sizeof(mcred));
-
- mcred.server = server_principal;
- mcred.client = client_principal;
-
- kerr = krb5_cc_retrieve_cred(kr->ctx, ccache, 0, &mcred, &cred);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_cc_retrieve_cred failed.\n"));
- goto done;
- }
-
- kerr = krb5_decode_ticket(&cred.ticket, &ticket);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_decode_ticket failed.\n"));
- goto done;
- }
-
- kerr = krb5_server_decrypt_ticket_keytab(kr->ctx, keytab, ticket);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_server_decrypt_ticket_keytab failed.\n"));
- goto done;
- }
-
- kerr = sss_krb5_find_authdata(kr->ctx,
- ticket->enc_part2->authorization_data, NULL,
- KRB5_AUTHDATA_WIN2K_PAC, &pac_authdata);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_find_authdata failed.\n"));
- goto done;
- }
-
- if (pac_authdata == NULL || pac_authdata[0] == NULL) {
- DEBUG(SSSDBG_OP_FAILURE, ("No PAC authdata available.\n"));
- kerr = ENOENT;
- goto done;
- }
-
- if (pac_authdata[1] != NULL) {
- DEBUG(SSSDBG_OP_FAILURE, ("More than one PAC autdata found.\n"));
- kerr = EINVAL;
- goto done;
- }
-
- kerr = krb5_pac_parse(kr->ctx, pac_authdata[0]->contents,
- pac_authdata[0]->length, &pac);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_pac_parse failed.\n"));
- goto done;
- }
-
- kerr = krb5_kt_get_entry(kr->ctx, keytab, ticket->server,
- ticket->enc_part.kvno, ticket->enc_part.enctype,
- &entry);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_kt_get_entry failed.\n"));
- goto done;
- }
-
- kerr = krb5_pac_verify(kr->ctx, pac, 0, NULL, &entry.key, NULL);
- if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("krb5_pac_verify failed.\n"));
- goto done;
- }
-
- ret = unsetenv("_SSS_LOOPS");
- if (ret != EOK) {
- DEBUG(1, ("Failed to unset _SSS_LOOPS, "
- "sss_pac_make_request will most certainly fail.\n"));
- }
sss_data.len = pac_authdata[0]->length;
sss_data.data = pac_authdata[0]->contents;
@@ -198,25 +116,10 @@ static krb5_error_code extract_and_send_pac(struct krb5_req *kr,
if (ret != NSS_STATUS_SUCCESS || errnop != 0) {
DEBUG(SSSDBG_OP_FAILURE, ("sss_pac_make_request failed [%d][%d].\n",
ret, errnop));
- kerr = EIO;
- goto done;
- }
-
- kerr = 0;
-
-done:
- if (entry.magic != 0) {
- krb5_free_keytab_entry_contents(kr->ctx, &entry);
- }
- krb5_pac_free(kr->ctx, pac);
- krb5_free_authdata(kr->ctx, pac_authdata);
- if (ticket != NULL) {
- krb5_free_ticket(kr->ctx, ticket);
+ return EIO;
}
- krb5_free_cred_contents(kr->ctx, &cred);
-
- return kerr;
+ return EOK;
}
static void sss_krb5_expire_callback_func(krb5_context context, void *data,
@@ -835,6 +738,7 @@ static krb5_error_code validate_tgt(struct krb5_req *kr)
krb5_principal validation_princ = NULL;
bool realm_entry_found = false;
krb5_ccache validation_ccache = NULL;
+ krb5_authdata **pac_authdata = NULL;
memset(&keytab, 0, sizeof(keytab));
kerr = krb5_kt_resolve(kr->ctx, kr->keytab, &keytab);
@@ -931,10 +835,20 @@ static krb5_error_code validate_tgt(struct krb5_req *kr)
/* Try to find and send the PAC to the PAC responder for principals which
* do not belong to our realm. Failures are not critical. */
if (kr->upn_from_different_realm) {
- kerr = extract_and_send_pac(kr, validation_ccache, validation_princ,
- kr->creds->client, keytab);
+ kerr = sss_extract_pac(kr->ctx, validation_ccache, validation_princ,
+ kr->creds->client, keytab, &pac_authdata);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("sss_extract_and_send_pac failed, group " \
+ "membership for user with principal [%s] " \
+ "might not be correct.\n", kr->name));
+ kerr = 0;
+ goto done;
+ }
+
+ kerr = sss_send_pac(pac_authdata);
+ krb5_free_authdata(kr->ctx, pac_authdata);
if (kerr != 0) {
- DEBUG(SSSDBG_OP_FAILURE, ("extract_and_send_pac failed, group " \
+ DEBUG(SSSDBG_OP_FAILURE, ("sss_send_pac failed, group " \
"membership for user with principal [%s] " \
"might not be correct.\n", kr->name));
kerr = 0;
diff --git a/src/util/sss_krb5.c b/src/util/sss_krb5.c
index cbee96e8..38374578 100644
--- a/src/util/sss_krb5.c
+++ b/src/util/sss_krb5.c
@@ -1004,3 +1004,114 @@ krb5_error_code sss_krb5_find_authdata(krb5_context context,
return ENOTSUP;
#endif
}
+
+krb5_error_code sss_extract_pac(krb5_context ctx,
+ krb5_ccache ccache,
+ krb5_principal server_principal,
+ krb5_principal client_principal,
+ krb5_keytab keytab,
+ krb5_authdata ***_pac_authdata)
+{
+#ifdef HAVE_PAC_RESPONDER
+ krb5_error_code kerr;
+ krb5_creds mcred;
+ krb5_creds cred;
+ krb5_authdata **pac_authdata = NULL;
+ krb5_pac pac = NULL;
+ int ret;
+ krb5_ticket *ticket = NULL;
+ krb5_keytab_entry entry;
+
+ memset(&entry, 0, sizeof(entry));
+ memset(&mcred, 0, sizeof(mcred));
+ memset(&cred, 0, sizeof(mcred));
+
+ mcred.server = server_principal;
+ mcred.client = client_principal;
+
+ kerr = krb5_cc_retrieve_cred(ctx, ccache, 0, &mcred, &cred);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_cc_retrieve_cred failed.\n"));
+ goto done;
+ }
+
+ kerr = krb5_decode_ticket(&cred.ticket, &ticket);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_decode_ticket failed.\n"));
+ goto done;
+ }
+
+ kerr = krb5_server_decrypt_ticket_keytab(ctx, keytab, ticket);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_server_decrypt_ticket_keytab failed.\n"));
+ goto done;
+ }
+
+ kerr = sss_krb5_find_authdata(ctx,
+ ticket->enc_part2->authorization_data, NULL,
+ KRB5_AUTHDATA_WIN2K_PAC, &pac_authdata);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_find_authdata failed.\n"));
+ goto done;
+ }
+
+ if (pac_authdata == NULL || pac_authdata[0] == NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, ("No PAC authdata available.\n"));
+ kerr = ENOENT;
+ goto done;
+ }
+
+ if (pac_authdata[1] != NULL) {
+ DEBUG(SSSDBG_OP_FAILURE, ("More than one PAC autdata found.\n"));
+ kerr = EINVAL;
+ goto done;
+ }
+
+ kerr = krb5_pac_parse(ctx, pac_authdata[0]->contents,
+ pac_authdata[0]->length, &pac);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_pac_parse failed.\n"));
+ goto done;
+ }
+
+ kerr = krb5_kt_get_entry(ctx, keytab, ticket->server,
+ ticket->enc_part.kvno, ticket->enc_part.enctype,
+ &entry);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_kt_get_entry failed.\n"));
+ goto done;
+ }
+
+ kerr = krb5_pac_verify(ctx, pac, 0, NULL, &entry.key, NULL);
+ if (kerr != 0) {
+ DEBUG(SSSDBG_OP_FAILURE, ("krb5_pac_verify failed.\n"));
+ goto done;
+ }
+
+ ret = unsetenv("_SSS_LOOPS");
+ if (ret != EOK) {
+ DEBUG(1, ("Failed to unset _SSS_LOOPS, "
+ "sss_pac_make_request will most certainly fail.\n"));
+ }
+
+ *_pac_authdata = pac_authdata;
+ kerr = 0;
+
+done:
+ if (kerr != 0) {
+ krb5_free_authdata(ctx, pac_authdata);
+ }
+ if (entry.magic != 0) {
+ krb5_free_keytab_entry_contents(ctx, &entry);
+ }
+ krb5_pac_free(ctx, pac);
+ if (ticket != NULL) {
+ krb5_free_ticket(ctx, ticket);
+ }
+
+ krb5_free_cred_contents(ctx, &cred);
+ return kerr;
+#else
+ return ENOTSUP;
+#endif
+}
diff --git a/src/util/sss_krb5.h b/src/util/sss_krb5.h
index 6a61f0ea..deb0cbff 100644
--- a/src/util/sss_krb5.h
+++ b/src/util/sss_krb5.h
@@ -175,4 +175,11 @@ krb5_error_code sss_krb5_find_authdata(krb5_context context,
krb5_authdata *const *ap_req_authdata,
krb5_authdatatype ad_type,
krb5_authdata ***results);
+
+krb5_error_code sss_extract_pac(krb5_context ctx,
+ krb5_ccache ccache,
+ krb5_principal server_principal,
+ krb5_principal client_principal,
+ krb5_keytab keytab,
+ krb5_authdata ***_pac_authdata);
#endif /* __SSS_KRB5_H__ */
generated by cgit (git 2.34.1) at 2024-11-04 21:28:59 +0000