ncacn_http: Authentication modules for http library

Signed-off-by: Samuel Cabrero <samuelcabrero@kernevil.me>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

1 files changed, 137 insertions, 0 deletions

diff --git a/source4/lib/http/gensec/basic.c b/source4/lib/http/gensec/basic.c
new file mode 100644
index 0000000000..86a2d51d67
--- /dev/null
+++ b/source4/lib/http/gensec/basic.c
@@ -0,0 +1,137 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   HTTP library - Basic authentication mechanism gensec module
+
+   Copyright (C) 2014 Samuel Cabrero <samuelcabrero@kernevil.me>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "auth/auth.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "auth/credentials/credentials.h"
+
+_PUBLIC_ NTSTATUS gensec_http_basic_init(void);
+
+struct gensec_http_basic_state {
+	enum {
+		GENSEC_HTTP_BASIC_START,
+		GENSEC_HTTP_BASIC_DONE,
+		GENSEC_HTTP_BASIC_ERROR,
+	} step;
+};
+
+static NTSTATUS gensec_http_basic_client_start(struct gensec_security *gensec)
+{
+	struct gensec_http_basic_state *state;
+
+	state = talloc_zero(gensec, struct gensec_http_basic_state);
+	if (state == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	gensec->private_data = state;
+
+	state->step = GENSEC_HTTP_BASIC_START;
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_http_basic_update(struct gensec_security *gensec_ctx,
+					 TALLOC_CTX *mem_ctx,
+					 struct tevent_context *ev,
+					 const DATA_BLOB in,
+					 DATA_BLOB *out)
+{
+	struct gensec_http_basic_state *state;
+	struct cli_credentials *creds;
+	char *tmp, *b64;
+
+	state = talloc_get_type_abort(gensec_ctx->private_data,
+				      struct gensec_http_basic_state);
+	creds = gensec_get_credentials(gensec_ctx);
+
+	switch (gensec_ctx->gensec_role) {
+	case GENSEC_CLIENT:
+		switch (state->step) {
+		case GENSEC_HTTP_BASIC_START:
+			tmp = talloc_asprintf(mem_ctx, "%s\\%s:%s",
+					cli_credentials_get_domain(creds),
+					cli_credentials_get_username(creds),
+					cli_credentials_get_password(creds));
+			if (tmp == NULL) {
+				state->step = GENSEC_HTTP_BASIC_ERROR;
+				return NT_STATUS_NO_MEMORY;
+			}
+			*out = data_blob_string_const(tmp);
+
+			b64 = base64_encode_data_blob(mem_ctx, *out);
+			if (b64 == NULL) {
+				state->step = GENSEC_HTTP_BASIC_ERROR;
+				return NT_STATUS_NO_MEMORY;
+			}
+			TALLOC_FREE(tmp);
+
+			tmp = talloc_asprintf(mem_ctx, "Basic %s", b64);
+			if (tmp == NULL) {
+				state->step = GENSEC_HTTP_BASIC_ERROR;
+				return NT_STATUS_NO_MEMORY;
+			}
+			TALLOC_FREE(b64);
+
+			*out = data_blob_string_const(tmp);
+			state->step = GENSEC_HTTP_BASIC_DONE;
+			return NT_STATUS_OK;
+
+		case GENSEC_HTTP_BASIC_DONE:
+		case GENSEC_HTTP_BASIC_ERROR:
+		default:
+			break;
+		}
+		state->step = GENSEC_HTTP_BASIC_ERROR;
+		return NT_STATUS_INTERNAL_ERROR;
+
+	case GENSEC_SERVER:
+		state->step = GENSEC_HTTP_BASIC_ERROR;
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	state->step = GENSEC_HTTP_BASIC_ERROR;
+	return NT_STATUS_INTERNAL_ERROR;
+}
+
+static const struct gensec_security_ops gensec_http_basic_security_ops = {
+	.name           = "http_basic",
+	.auth_type      = 0,
+	.client_start   = gensec_http_basic_client_start,
+	.update         = gensec_http_basic_update,
+	.enabled        = true,
+	.priority       = GENSEC_EXTERNAL,
+};
+
+_PUBLIC_ NTSTATUS gensec_http_basic_init(void)
+{
+	NTSTATUS status;
+
+	status = gensec_register(&gensec_http_basic_security_ops);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register '%s' gensec backend!\n",
+				gensec_http_basic_security_ops.name));
+		return status;
+	}
+
+	return status;
+}