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path: root/source4/auth/kerberos/kerberos_pac.c
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Diffstat (limited to 'source4/auth/kerberos/kerberos_pac.c')
-rw-r--r--source4/auth/kerberos/kerberos_pac.c110
1 files changed, 72 insertions, 38 deletions
diff --git a/source4/auth/kerberos/kerberos_pac.c b/source4/auth/kerberos/kerberos_pac.c
index fb8755c0b8..312013fdb9 100644
--- a/source4/auth/kerberos/kerberos_pac.c
+++ b/source4/auth/kerberos/kerberos_pac.c
@@ -1,9 +1,9 @@
/*
Unix SMB/CIFS implementation.
- Kerberos backend for GENSEC
+ Create and parse the krb5 PAC
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
Copyright (C) Andrew Tridgell 2001
Copyright (C) Luke Howard 2002-2003
Copyright (C) Stefan Metzmacher 2004-2005
@@ -92,8 +92,6 @@ static NTSTATUS check_pac_checksum(TALLOC_CTX *mem_ctx,
DATA_BLOB modified_pac_blob = data_blob_talloc(mem_ctx, blob.data, blob.length);
int i;
- file_save("/tmp/pac.in", blob.data, blob.length);
-
status = ndr_pull_struct_blob(&blob, mem_ctx, &pac_data,
(ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
if (!NT_STATUS_IS_OK(status)) {
@@ -156,8 +154,6 @@ static NTSTATUS check_pac_checksum(TALLOC_CTX *mem_ctx,
memset(&modified_pac_blob.data[modified_pac_blob.length - 44],
'\0', 16);
- file_save("/tmp/pac.in.blanked", modified_pac_blob.data, modified_pac_blob.length);
-
/* verify by service_key */
status = check_pac_checksum(mem_ctx,
modified_pac_blob, &srv_sig,
@@ -224,9 +220,10 @@ static krb5_error_code make_pac_checksum(TALLOC_CTX *mem_ctx,
krb5_context context,
krb5_keyblock *krbtgt_keyblock,
krb5_keyblock *server_keyblock,
- krb5_data *pac)
+ DATA_BLOB *pac)
{
NTSTATUS nt_status;
+ DATA_BLOB zero_blob = data_blob(NULL, 0);
DATA_BLOB tmp_blob = data_blob(NULL, 0);
DATA_BLOB server_checksum_blob;
krb5_error_code ret;
@@ -234,11 +231,19 @@ static krb5_error_code make_pac_checksum(TALLOC_CTX *mem_ctx,
struct netr_SamBaseInfo *sam;
struct timeval tv = timeval_current();
+ enum {
+ PAC_BUF_LOGON_TYPE = 0,
+ PAC_BUF_LOGON_NAME = 1,
+ PAC_BUF_KDC_CHECKSUM = 2,
+ PAC_BUF_SRV_CHECKSUM = 3,
+ PAC_BUF_NUM_BUFFERS = 4
+ };
+
if (!pac_data) {
return ENOMEM;
}
- pac_data->num_buffers = 4;
+ pac_data->num_buffers = PAC_BUF_NUM_BUFFERS;
pac_data->version = 0;
pac_data->buffers = talloc_array(pac_data,
@@ -249,9 +254,10 @@ static krb5_error_code make_pac_checksum(TALLOC_CTX *mem_ctx,
talloc_free(pac_data);
return ENOMEM;
}
- pac_data->buffers[0].type = PAC_TYPE_LOGON_INFO;
- pac_data->buffers[0].info = talloc_zero(pac_data->buffers,
- union PAC_INFO);
+
+ pac_data->buffers[PAC_BUF_LOGON_TYPE].type = PAC_TYPE_LOGON_INFO;
+ pac_data->buffers[PAC_BUF_LOGON_TYPE].info = talloc_zero(pac_data->buffers,
+ union PAC_INFO);
nt_status = auth_convert_server_info_sambaseinfo(pac_data->buffers[0].info,
server_info, &sam);
@@ -261,81 +267,109 @@ static krb5_error_code make_pac_checksum(TALLOC_CTX *mem_ctx,
return EINVAL;
}
- pac_data->buffers[0].info->logon_info.info3.base = *sam;
-
- pac_data->buffers[1].type = PAC_TYPE_LOGON_NAME;
- pac_data->buffers[1].info = talloc_zero(pac_data->buffers,
+ pac_data->buffers[PAC_BUF_LOGON_TYPE].info->logon_info.info3.base = *sam;
+ pac_data->buffers[PAC_BUF_LOGON_TYPE].size
+ = ndr_size_PAC_INFO(pac_data->buffers[PAC_BUF_LOGON_TYPE].info,
+ pac_data->buffers[PAC_BUF_LOGON_TYPE].type,
+ 0);
+ pac_data->buffers[PAC_BUF_LOGON_TYPE]._pad = 0;
+
+ pac_data->buffers[PAC_BUF_LOGON_NAME].type = PAC_TYPE_LOGON_NAME;
+ pac_data->buffers[PAC_BUF_LOGON_NAME].info = talloc_zero(pac_data->buffers,
union PAC_INFO);
- pac_data->buffers[1].info->logon_name.account_name
+ pac_data->buffers[PAC_BUF_LOGON_NAME].info->logon_name.account_name
= server_info->account_name;
- pac_data->buffers[1].info->logon_name.logon_time
+ pac_data->buffers[PAC_BUF_LOGON_NAME].info->logon_name.logon_time
= timeval_to_nttime(&tv);
+ pac_data->buffers[PAC_BUF_LOGON_NAME].size
+ = ndr_size_PAC_INFO(pac_data->buffers[PAC_BUF_LOGON_NAME].info,
+ pac_data->buffers[PAC_BUF_LOGON_NAME].type,
+ 0);
+ pac_data->buffers[PAC_BUF_LOGON_NAME]._pad = 0;
- pac_data->buffers[2].type = PAC_TYPE_KDC_CHECKSUM;
- pac_data->buffers[2].info = talloc_zero(pac_data->buffers,
- union PAC_INFO);
- pac_data->buffers[3].type = PAC_TYPE_SRV_CHECKSUM;
- pac_data->buffers[3].info = talloc_zero(pac_data->buffers,
+ pac_data->buffers[PAC_BUF_KDC_CHECKSUM].type = PAC_TYPE_KDC_CHECKSUM;
+ pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info = talloc_zero(pac_data->buffers,
union PAC_INFO);
-
/* First, just get the keytypes filled in (and lengths right, eventually) */
- ret = make_pac_checksum(mem_ctx, tmp_blob, &pac_data->buffers[2].info->srv_cksum,
+ ret = make_pac_checksum(mem_ctx, zero_blob,
+ &pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info->kdc_cksum,
context, krbtgt_keyblock);
+ if (ret) {
+ DEBUG(2, ("making krbtgt PAC checksum failed: %s\n",
+ smb_get_krb5_error_message(context, ret, mem_ctx)));
+ talloc_free(pac_data);
+ return ret;
+ }
- ret = make_pac_checksum(mem_ctx, tmp_blob, &pac_data->buffers[3].info->srv_cksum,
+ pac_data->buffers[PAC_BUF_KDC_CHECKSUM].size
+ = ndr_size_PAC_INFO(pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info,
+ pac_data->buffers[PAC_BUF_KDC_CHECKSUM].type,
+ 0);
+ pac_data->buffers[PAC_BUF_KDC_CHECKSUM]._pad = 0;
+
+
+ pac_data->buffers[PAC_BUF_SRV_CHECKSUM].type = PAC_TYPE_SRV_CHECKSUM;
+ pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info = talloc_zero(pac_data->buffers,
+ union PAC_INFO);
+ ret = make_pac_checksum(mem_ctx, zero_blob,
+ &pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info->srv_cksum,
context, server_keyblock);
if (ret) {
- DEBUG(2, ("making PAC checksum failed: %s\n",
+ DEBUG(2, ("making server PAC checksum failed: %s\n",
smb_get_krb5_error_message(context, ret, mem_ctx)));
talloc_free(pac_data);
return ret;
}
+ pac_data->buffers[PAC_BUF_SRV_CHECKSUM].size
+ = ndr_size_PAC_INFO(pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info,
+ pac_data->buffers[PAC_BUF_SRV_CHECKSUM].type,
+ 0);
+ pac_data->buffers[PAC_BUF_SRV_CHECKSUM]._pad = 0;
+
/* But wipe out the actual signatures */
- ZERO_STRUCT(pac_data->buffers[2].info->kdc_cksum.signature);
- ZERO_STRUCT(pac_data->buffers[3].info->srv_cksum.signature);
+ ZERO_STRUCT(pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info->kdc_cksum.signature);
+ ZERO_STRUCT(pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info->srv_cksum.signature);
nt_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(nt_status)) {
- DEBUG(1, ("PAC push failed: %s\n", nt_errstr(nt_status)));
+ DEBUG(1, ("PAC (presig) push failed: %s\n", nt_errstr(nt_status)));
talloc_free(pac_data);
return EINVAL;
}
- file_save("/tmp/pac.out.blank", tmp_blob.data, tmp_blob.length);
-
/* Then sign the result of the previous push, where the sig was zero'ed out */
ret = make_pac_checksum(mem_ctx, tmp_blob, &pac_data->buffers[3].info->srv_cksum,
context, server_keyblock);
/* Push the Server checksum out */
- nt_status = ndr_push_struct_blob(&server_checksum_blob, mem_ctx, &pac_data->buffers[3].info->srv_cksum,
+ nt_status = ndr_push_struct_blob(&server_checksum_blob, mem_ctx,
+ &pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info->srv_cksum,
(ndr_push_flags_fn_t)ndr_push_PAC_SIGNATURE_DATA);
if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(1, ("PAC push failed: %s\n", nt_errstr(nt_status)));
+ DEBUG(1, ("PAC_SIGNATURE push failed: %s\n", nt_errstr(nt_status)));
talloc_free(pac_data);
return EINVAL;
}
/* Then sign the result of the previous push, where the sig was zero'ed out */
- ret = make_pac_checksum(mem_ctx, server_checksum_blob, &pac_data->buffers[2].info->kdc_cksum,
+ ret = make_pac_checksum(mem_ctx, server_checksum_blob,
+ &pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info->kdc_cksum,
context, krbtgt_keyblock);
/* And push it out again, this time to the world. This relies on determanistic pointer values */
nt_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(nt_status)) {
- DEBUG(1, ("PAC push failed: %s\n", nt_errstr(nt_status)));
+ DEBUG(1, ("PAC (final) push failed: %s\n", nt_errstr(nt_status)));
talloc_free(pac_data);
return EINVAL;
}
- file_save("/tmp/pac.out.signed", tmp_blob.data, tmp_blob.length);
+ *pac = tmp_blob;
- ret = krb5_data_copy(pac, tmp_blob.data, tmp_blob.length);
-
talloc_free(pac_data);
return ret;
}
generated by cgit (git 2.34.1) at 2024-07-06 08:51:19 +0000