Diff: features/mbedtls/targets/TARGET_STM/sha1_alt.h

Revision:

0:b74591d5ab33

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/mbedtls/targets/TARGET_STM/sha1_alt.h	Mon Dec 11 17:54:04 2017 +0000
@@ -0,0 +1,111 @@
+/*
+ * \file sha1_alt.h
+ *
+ * \brief SHA1 hw acceleration (hash function)
+ *
+ *  Copyright (C) 2017, STMicroelectronics
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+#ifndef MBEDTLS_SHA1_ALT_H
+#define MBEDTLS_SHA1_ALT_H
+
+#if defined (MBEDTLS_SHA1_ALT)
+
+
+#include "cmsis.h"
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ST_SHA1_BLOCK_SIZE   ((size_t) 64) // HW handles 512 bits, ie 64 bytes
+#define ST_SHA1_TIMEOUT      ((uint32_t) 3)
+/**
+ * \brief    SHA-1 context structure
+ * \note     HAL_HASH_SHA1_Accumulate will accumulate 512 bits packets, unless it is the last call to the  function
+ *           A ST_SHA1_BLOCK_SIZE bytes buffer is used to save values and handle the processing
+ *           multiples of ST_SHA1_BLOCK_SIZE bytes
+ *           If SHA1_finish is called and sbuf_len>0, the remaining bytes are accumulated prior to the call to HAL_HASH_SHA1_Finish
+ */
+typedef struct
+{
+    unsigned char sbuf[ST_SHA1_BLOCK_SIZE]; /*!< MBEDTLS_SHA1_BLOCK_SIZE buffer to store values so that algorithm is caled once the buffer is filled */
+    unsigned char sbuf_len; /*!< number of bytes remaining in sbuf to be processed */
+    HASH_HandleTypeDef hhash_sha1; /*!< ST HAL HASH struct */
+    uint32_t ctx_save_cr;
+    uint32_t ctx_save_str;
+    uint32_t ctx_save_csr[38];
+}
+mbedtls_sha1_context;
+
+/**
+ * \brief          Initialize SHA-1 context
+ *
+ * \param ctx      SHA-1 context to be initialized
+ */
+void mbedtls_sha1_init( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief          Clear SHA-1 context
+ *
+ * \param ctx      SHA-1 context to be cleared
+ */
+void mbedtls_sha1_free( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief          Clone (the state of) a SHA-1 context
+ *
+ * \param dst      The destination context
+ * \param src      The context to be cloned
+ */
+void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
+                         const mbedtls_sha1_context *src );
+
+/**
+ * \brief          SHA-1 context setup
+ *
+ * \param ctx      context to be initialized
+ */
+void mbedtls_sha1_starts( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief          SHA-1 process buffer
+ *
+ * \param ctx      SHA-1 context
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ */
+void mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen );
+
+/**
+ * \brief          SHA-1 final digest
+ *
+ * \param ctx      SHA-1 context
+ * \param output   SHA-1 checksum result
+ */
+void mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] );
+
+/* Internal use */
+void mbedtls_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[ST_SHA1_BLOCK_SIZE] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_SHA1_ALT */
+
+#endif /* sha1_alt.h */