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-rw-r--r--source4/libcli/auth/gensec_krb5.c40
1 files changed, 30 insertions, 10 deletions
diff --git a/source4/libcli/auth/gensec_krb5.c b/source4/libcli/auth/gensec_krb5.c
index 18053b5ded..0effed2198 100644
--- a/source4/libcli/auth/gensec_krb5.c
+++ b/source4/libcli/auth/gensec_krb5.c
@@ -50,7 +50,7 @@ struct gensec_krb5_state {
static NTSTATUS gensec_krb5_pac_checksum(DATA_BLOB pac_data,
struct PAC_SIGNATURE_DATA *sig,
struct gensec_krb5_state *gensec_krb5_state,
- uint32 cksum_type)
+ uint32 keyusage)
{
krb5_error_code ret;
krb5_crypto crypto;
@@ -63,20 +63,27 @@ static NTSTATUS gensec_krb5_pac_checksum(DATA_BLOB pac_data,
ret = krb5_crypto_init(gensec_krb5_state->krb5_context,
&gensec_krb5_state->krb5_keyblock,
- cksum_type,
+ 0,
&crypto);
if (ret) {
DEBUG(0,("krb5_crypto_init() failed\n"));
return NT_STATUS_FOOBAR;
}
-
+{
+int i;
+for (i=0; i < 40; i++) {
+ keyusage = i;
ret = krb5_verify_checksum(gensec_krb5_state->krb5_context,
crypto,
- cksum_type,
+ keyusage,
pac_data.data,
pac_data.length,
&cksum);
-
+ if (!ret) {
+ DEBUG(0,("PAC Verified: keyusage: %d\n", keyusage));
+ break;
+ }
+}}
krb5_crypto_destroy(gensec_krb5_state->krb5_context, crypto);
if (ret) {
@@ -89,7 +96,7 @@ static NTSTATUS gensec_krb5_pac_checksum(DATA_BLOB pac_data,
return NT_STATUS_OK;
}
-NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
+static NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
struct PAC_LOGON_INFO *logon_info_out,
DATA_BLOB blob,
struct gensec_krb5_state *gensec_krb5_state)
@@ -101,7 +108,7 @@ NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
struct PAC_SIGNATURE_DATA *kdc_sig_ptr;
struct PAC_LOGON_INFO *logon_info = NULL;
struct PAC_DATA pac_data;
- DATA_BLOB tmp_blob;
+ DATA_BLOB tmp_blob = data_blob(NULL, 0);
int i;
status = ndr_pull_struct_blob(&blob, mem_ctx, &pac_data,
@@ -110,7 +117,6 @@ NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
DEBUG(0,("can't parse the PAC\n"));
return status;
}
-
NDR_PRINT_DEBUG(PAC_DATA, &pac_data);
if (pac_data.num_buffers < 3) {
@@ -164,13 +170,20 @@ NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
}
/* clear the kdc_key */
- memset((void *)kdc_sig_ptr , '\0', sizeof(*kdc_sig_ptr));
+/* memset((void *)kdc_sig_ptr , '\0', sizeof(*kdc_sig_ptr));*/
status = ndr_push_struct_blob(&tmp_blob, mem_ctx, &pac_data,
(ndr_push_flags_fn_t)ndr_push_PAC_DATA);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
+ status = ndr_pull_struct_blob(&tmp_blob, mem_ctx, &pac_data,
+ (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("can't parse the PAC\n"));
+ return status;
+ }
+ /*NDR_PRINT_DEBUG(PAC_DATA, &pac_data);*/
/* verify by kdc_key */
status = gensec_krb5_pac_checksum(tmp_blob, &kdc_sig, gensec_krb5_state, 0);
@@ -180,13 +193,20 @@ NTSTATUS gensec_krb5_decode_pac(TALLOC_CTX *mem_ctx,
}
/* clear the service_key */
- memset((void *)srv_sig_ptr , '\0', sizeof(*srv_sig_ptr));
+/* memset((void *)srv_sig_ptr , '\0', sizeof(*srv_sig_ptr));*/
status = ndr_push_struct_blob(&tmp_blob, mem_ctx, &pac_data,
(ndr_push_flags_fn_t)ndr_push_PAC_DATA);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
+ status = ndr_pull_struct_blob(&tmp_blob, mem_ctx, &pac_data,
+ (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("can't parse the PAC\n"));
+ return status;
+ }
+ NDR_PRINT_DEBUG(PAC_DATA, &pac_data);
/* verify by servie_key */
status = gensec_krb5_pac_checksum(tmp_blob, &srv_sig, gensec_krb5_state, 0);