M467 Support crypto GCM H/W

connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M460/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 ARM Limited. All rights reserved.
+# Copyright (c) 2022 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 target_include_directories(mbed-mbedtls
@@ -8,6 +8,7 @@ target_include_directories(mbed-mbedtls
         ./ecp
         ./rsa
         ./sha
+        ./gcm
 )
 
 target_sources(mbed-mbedtls
@@ -19,4 +20,5 @@ target_sources(mbed-mbedtls
         sha/sha256_alt.c
         sha/sha512_alt.c
         sha/sha_alt_hw.c
+        gcm/gcm_alt.c
 )

connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M460/gcm/gcm_alt.h

@@ -0,0 +1,72 @@
+/**
+ * \file gcm.h
+ *
+ * \brief This file contains GCM definitions and functions.
+ *
+ * The Galois/Counter Mode (GCM) for 128-bit block ciphers is defined
+ * in <em>D. McGrew, J. Viega, The Galois/Counter Mode of Operation
+ * (GCM), Natl. Inst. Stand. Technol.</em>
+ *
+ * For more information on GCM, see <em>NIST SP 800-38D: Recommendation for
+ * Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC</em>.
+ *
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  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_GCM_ALT_H
+#define MBEDTLS_GCM_ALT_H
+
+#if defined(MBEDTLS_GCM_ALT)
+
+#define MAX_GCM_BUF      256
+#define GCM_PBLOCK_SIZE  MAX_GCM_BUF     /* NOTE: This value must be 16 bytes alignment. This value must > size of A */
+
+
+/**
+ * \brief          The GCM context structure.
+ */
+typedef struct mbedtls_gcm_context
+{
+    uint64_t len;                         /*!< The total length of the encrypted data. */
+    int mode;                             /*!< The operation to perform:
+                                               #MBEDTLS_GCM_ENCRYPT or
+                                               #MBEDTLS_GCM_DECRYPT. */
+    
+    uint32_t keySize;       		/* Key size unit is bytes: 16(128 bits)/24(192 bits)/32(256 bits) */
+    uint32_t encDec;        		/* 0: decrypt, 1: encrypt */
+    uint32_t opMode;        		/* AES_MODE_ECB/CBC/CFB */
+    uint32_t iv[4];         		/* IV for next block cipher */
+    uint32_t keys[8];       		/* Cipher key */
+    uint32_t basicOpt;      		/* Basic option of AES controller */
+    uint8_t  gcm_buf[MAX_GCM_BUF]; 	/* buffer for GCM DMA input */
+    uint8_t  out_buf[MAX_GCM_BUF+16]; 	/* buffer for GCM DMA output */
+    uint8_t  fb_buf[72];    		/* feedback buffer for GCM DMA */
+    uint8_t  fb_buf2[72];   		/* feedback buffer 2 for GCM DMA */
+    uint8_t  tag[16];       		/* Tag */
+    uint32_t gcm_buf_bytes; 		/* Bytes in gcm_buf */
+    uint32_t firstFlag;     		/* A flag for the first data block */
+    uint32_t endFlag;       		/* final block is done */
+    
+//    uint8_t *add;
+//    size_t addlen;
+}
+mbedtls_gcm_context;
+
+#endif  /* MBEDTLS_GCM_ALT */
+
+#endif /* gcm.h */