1 files changed, 89 insertions, 0 deletions
diff --git a/library/mps_error.h b/library/mps_error.h
new file mode 100644
index 00000000000..016a84ce49e
--- /dev/null
+++ b/library/mps_error.h
@@ -0,0 +1,89 @@
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+/**
+ * \file mps_error.h
+ *
+ * \brief Error codes used by MPS
+ */
+
+#ifndef MBEDTLS_MPS_ERROR_H
+#define MBEDTLS_MPS_ERROR_H
+
+
+/* TODO: The error code allocation needs to be revisited:
+ *
+ * - Should we make (some of) the MPS Reader error codes public?
+ *   If so, we need to adjust MBEDTLS_MPS_READER_MAKE_ERROR() to hit
+ *   a gap in the Mbed TLS public error space.
+ *   If not, we have to make sure we don't forward those errors
+ *   at the level of the public API -- no risk at the moment as
+ *   long as MPS is an experimental component not accessible from
+ *   public API.
+ */
+
+/**
+ * \name SECTION:       MPS general error codes
+ *
+ * \{
+ */
+
+#ifndef MBEDTLS_MPS_ERR_BASE
+#define MBEDTLS_MPS_ERR_BASE (0)
+#endif
+
+#define MBEDTLS_MPS_MAKE_ERROR(code) \
+    (-(MBEDTLS_MPS_ERR_BASE | (code)))
+
+#define MBEDTLS_ERR_MPS_OPERATION_UNEXPECTED  MBEDTLS_MPS_MAKE_ERROR(0x1)
+#define MBEDTLS_ERR_MPS_INTERNAL_ERROR        MBEDTLS_MPS_MAKE_ERROR(0x2)
+
+/* \} name SECTION: MPS general error codes */
+
+/**
+ * \name SECTION:       MPS Reader error codes
+ *
+ * \{
+ */
+
+#ifndef MBEDTLS_MPS_READER_ERR_BASE
+#define MBEDTLS_MPS_READER_ERR_BASE (1 << 8)
+#endif
+
+#define MBEDTLS_MPS_READER_MAKE_ERROR(code) \
+    (-(MBEDTLS_MPS_READER_ERR_BASE | (code)))
+
+/*! An attempt to reclaim the data buffer from a reader failed because
+ *  the user hasn't yet read and committed all of it. */
+#define MBEDTLS_ERR_MPS_READER_DATA_LEFT             MBEDTLS_MPS_READER_MAKE_ERROR(0x1)
+
+/*! An invalid argument was passed to the reader. */
+#define MBEDTLS_ERR_MPS_READER_INVALID_ARG           MBEDTLS_MPS_READER_MAKE_ERROR(0x2)
+
+/*! An attempt to move a reader to consuming mode through mbedtls_mps_reader_feed()
+ *  after pausing failed because the provided data is not sufficient to serve the
+ *  read requests that led to the pausing. */
+#define MBEDTLS_ERR_MPS_READER_NEED_MORE             MBEDTLS_MPS_READER_MAKE_ERROR(0x3)
+
+/*! A get request failed because not enough data is available in the reader. */
+#define MBEDTLS_ERR_MPS_READER_OUT_OF_DATA           MBEDTLS_MPS_READER_MAKE_ERROR(0x4)
+
+/*!< A get request after pausing and reactivating the reader failed because
+ *   the request is not in line with the request made prior to pausing. The user
+ *   must not change it's 'strategy' after pausing and reactivating a reader. */
+#define MBEDTLS_ERR_MPS_READER_INCONSISTENT_REQUESTS MBEDTLS_MPS_READER_MAKE_ERROR(0x5)
+
+/*! An attempt to reclaim the data buffer from a reader failed because the reader
+ *  has no accumulator it can use to backup the data that hasn't been processed. */
+#define MBEDTLS_ERR_MPS_READER_NEED_ACCUMULATOR      MBEDTLS_MPS_READER_MAKE_ERROR(0x6)
+
+/*! An attempt to reclaim the data buffer from a reader failed because the
+ *  accumulator passed to the reader is not large enough to hold both the
+ *  data that hasn't been processed and the excess of the last read-request. */
+#define MBEDTLS_ERR_MPS_READER_ACCUMULATOR_TOO_SMALL MBEDTLS_MPS_READER_MAKE_ERROR(0x7)
+
+/* \} name SECTION: MPS Reader error codes */
+
+#endif /* MBEDTLS_MPS_ERROR_H */