From d88af2fe24bfc3a55cd2bbfc8898a8dd21cc7cda Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Thu, 12 Jan 2012 22:03:07 +0100
Subject: auth/gensec: common helper functions should be in gensec_util.c

This makes the dependencies easier to handle.

metze
---
 auth/gensec/gensec_util.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)

(limited to 'auth')

diff --git a/auth/gensec/gensec_util.c b/auth/gensec/gensec_util.c
index 1b4c0b1a3e..feff3c3ac1 100644
--- a/auth/gensec/gensec_util.c
+++ b/auth/gensec/gensec_util.c
@@ -93,3 +93,119 @@ NTSTATUS gensec_generate_session_info_pac(TALLOC_CTX *mem_ctx,
 		return NT_STATUS_INTERNAL_ERROR;
 	}
 }
+
+/*
+ * These functions are for use in the deprecated
+ * gensec_socket code (public because SPNEGO must
+ * use them for recursion)
+ */
+_PUBLIC_ NTSTATUS gensec_wrap_packets(struct gensec_security *gensec_security,
+			     TALLOC_CTX *mem_ctx,
+			     const DATA_BLOB *in,
+			     DATA_BLOB *out,
+			     size_t *len_processed)
+{
+	if (!gensec_security->ops->wrap_packets) {
+		NTSTATUS nt_status;
+		size_t max_input_size;
+		DATA_BLOB unwrapped, wrapped;
+		max_input_size = gensec_max_input_size(gensec_security);
+		unwrapped = data_blob_const(in->data, MIN(max_input_size, (size_t)in->length));
+
+		nt_status = gensec_wrap(gensec_security,
+					mem_ctx,
+					&unwrapped, &wrapped);
+		if (!NT_STATUS_IS_OK(nt_status)) {
+			return nt_status;
+		}
+
+		*out = data_blob_talloc(mem_ctx, NULL, 4);
+		if (!out->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		RSIVAL(out->data, 0, wrapped.length);
+
+		if (!data_blob_append(mem_ctx, out, wrapped.data, wrapped.length)) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		*len_processed = unwrapped.length;
+		return NT_STATUS_OK;
+	}
+	return gensec_security->ops->wrap_packets(gensec_security, mem_ctx, in, out,
+						  len_processed);
+}
+
+/*
+ * These functions are for use in the deprecated
+ * gensec_socket code (public because SPNEGO must
+ * use them for recursion)
+ */
+NTSTATUS gensec_unwrap_packets(struct gensec_security *gensec_security,
+					TALLOC_CTX *mem_ctx,
+					const DATA_BLOB *in,
+					DATA_BLOB *out,
+					size_t *len_processed)
+{
+	if (!gensec_security->ops->unwrap_packets) {
+		DATA_BLOB wrapped;
+		NTSTATUS nt_status;
+		size_t packet_size;
+		if (in->length < 4) {
+			/* Missing the header we already had! */
+			DEBUG(0, ("Asked to unwrap packet of bogus length!  How did we get the short packet?!\n"));
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+
+		packet_size = RIVAL(in->data, 0);
+
+		wrapped = data_blob_const(in->data + 4, packet_size);
+
+		if (wrapped.length > (in->length - 4)) {
+			DEBUG(0, ("Asked to unwrap packed of bogus length %d > %d!  How did we get this?!\n",
+				  (int)wrapped.length, (int)(in->length - 4)));
+			return NT_STATUS_INTERNAL_ERROR;
+		}
+
+		nt_status = gensec_unwrap(gensec_security,
+					  mem_ctx,
+					  &wrapped, out);
+		if (!NT_STATUS_IS_OK(nt_status)) {
+			return nt_status;
+		}
+
+		*len_processed = packet_size + 4;
+		return nt_status;
+	}
+	return gensec_security->ops->unwrap_packets(gensec_security, mem_ctx, in, out,
+						    len_processed);
+}
+
+/*
+ * These functions are for use in the deprecated
+ * gensec_socket code (public because SPNEGO must
+ * use them for recursion)
+ */
+NTSTATUS gensec_packet_full_request(struct gensec_security *gensec_security,
+				    DATA_BLOB blob, size_t *size)
+{
+	if (gensec_security->ops->packet_full_request) {
+		return gensec_security->ops->packet_full_request(gensec_security,
+								 blob, size);
+	}
+	if (gensec_security->ops->unwrap_packets) {
+		if (blob.length) {
+			*size = blob.length;
+			return NT_STATUS_OK;
+		}
+		return STATUS_MORE_ENTRIES;
+	}
+
+	if (blob.length < 4) {
+		return STATUS_MORE_ENTRIES;
+	}
+	*size = 4 + RIVAL(blob.data, 0);
+	if (*size > blob.length) {
+		return STATUS_MORE_ENTRIES;
+	}
+	return NT_STATUS_OK;
+}
-- 
cgit