1 files changed, 75 insertions, 0 deletions
diff --git a/src/lib-sasl/mech-login.c b/src/lib-sasl/mech-login.c
new file mode 100644
index 0000000..83714f1
--- /dev/null
+++ b/src/lib-sasl/mech-login.c
@@ -0,0 +1,75 @@
+/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "str.h"
+#include "dsasl-client-private.h"
+
+enum login_state {
+	STATE_INIT = 0,
+	STATE_USER,
+	STATE_PASS
+};
+
+struct login_dsasl_client {
+	struct dsasl_client client;
+	enum login_state state;
+};
+
+static int
+mech_login_input(struct dsasl_client *_client,
+		 const unsigned char *input ATTR_UNUSED,
+		 size_t input_len ATTR_UNUSED,
+		 const char **error_r)
+{
+	struct login_dsasl_client *client =
+		(struct login_dsasl_client *)_client;
+
+	if (client->state == STATE_PASS) {
+		*error_r = "Server didn't finish authentication";
+		return -1;
+	}
+	client->state++;
+	return 0;
+}
+
+static int
+mech_login_output(struct dsasl_client *_client,
+		  const unsigned char **output_r, size_t *output_len_r,
+		  const char **error_r)
+{
+	struct login_dsasl_client *client =
+		(struct login_dsasl_client *)_client;
+
+	if (_client->set.authid == NULL) {
+		*error_r = "authid not set";
+		return -1;
+	}
+	if (_client->password == NULL) {
+		*error_r = "password not set";
+		return -1;
+	}
+
+	switch (client->state) {
+	case STATE_INIT:
+		*output_r = uchar_empty_ptr;
+		*output_len_r = 0;
+		return 0;
+	case STATE_USER:
+		*output_r = (const unsigned char *)_client->set.authid;
+		*output_len_r = strlen(_client->set.authid);
+		return 0;
+	case STATE_PASS:
+		*output_r = (const unsigned char *)_client->set.password;
+		*output_len_r = strlen(_client->set.password);
+		return 0;
+	}
+	i_unreached();
+}
+
+const struct dsasl_client_mech dsasl_client_mech_login = {
+	.name = "LOGIN",
+	.struct_size = sizeof(struct login_dsasl_client),
+
+	.input = mech_login_input,
+	.output = mech_login_output
+};