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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2022/05/13 09:09:17 UTC
[GitHub] [incubator-nuttx] CV-Bowen commented on a diff in pull request #6259: arm/tlsr82: add hardware aes encrypt and decrypt support.
CV-Bowen commented on code in PR #6259:
URL: https://github.com/apache/incubator-nuttx/pull/6259#discussion_r872167800
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arch/arm/src/tlsr82/tlsr82_aes.c:
##########
@@ -0,0 +1,255 @@
+/****************************************************************************
+ * arch/arm/src/tlsr82/tlsr82_aes.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/crypto/crypto.h>
+#include <nuttx/semaphore.h>
+#include <assert.h>
+#include <debug.h>
+#include <semaphore.h>
+
+#include "hardware/tlsr82_aes.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define AES_BLK_SHIFT (4)
+#define AES_BLK_SIZE (1 << AES_BLK_SHIFT)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private data
+ ****************************************************************************/
+
+static sem_t g_aes_sem = SEM_INITIALIZER(1);
+
+/****************************************************************************
+ * Public data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: tlsr82_aes_encrypt
+ *
+ * Description:
+ * This function servers to perform aes_128 encryption for 16-Byte input
+ * data with specific 16-Byte key.
+ *
+ * Input Parameters:
+ * key - the pointer to the 16-Byte key
+ * data - the pointer to the 16-Byte plain text
+ * result - the pointer to the encryption result cipher text
+ *
+ * Returned Value:
+ * 0: Success, not 0: Failure
+ *
+ ****************************************************************************/
+
+int tlsr82_aes_encrypt(const uint8_t *key, const uint8_t *data,
+ uint8_t *result)
+{
+ uint32_t tmp;
+ int i;
+
+ /* Trigger encrypt operation */
+
+ AES_CTRL_REG &= (~AES_CTRL_CODEC_TRIG);
+
+ /* Set the aes key */
+
+ for (i = 0; i < 16; i++)
+ {
+ AES_KEY_REG(i) = key[i];
+ }
+
+ /* Feed data to hardware */
+
+ while (AES_CTRL_REG & AES_CTRL_DATA_FEED)
+ {
+ tmp = data[0] + (data[1] << 8) + (data[2] << 16) + (data[3] << 24);
+ AES_DATA_REG = tmp;
+ data += 4;
+ }
+
+ /* Wait for the encrypt finished */
+
+ while ((AES_CTRL_REG & AES_CTRL_CODEC_FINISHED) == 0);
+
+ /* Asign the result */
+
+ for (i = 0; i < 4; i++)
+ {
+ tmp = AES_DATA_REG;
+ *result++ = tmp & 0xff;
+ *result++ = (tmp >> 8) & 0xff;
+ *result++ = (tmp >> 16) & 0xff;
+ *result++ = (tmp >> 24) & 0xff;
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ * Name: tlsr82_aes_decrypt
+ *
+ * Description:
+ * This function servers to perform aes_128 decryption for 16-Byte input
+ * data with specific 16-Byte key.
+ *
+ * Input Parameters:
+ * key - the pointer to the 16-Byte key
+ * data - the pointer to the 16-Byte cipher text
+ * result - the pointer to the decryption result plain text
+ *
+ * Returned Value:
+ * 0: Success, not 0: Failure
+ *
+ ****************************************************************************/
+
+int tlsr82_aes_decrypt(const uint8_t *key, const uint8_t *data,
+ uint8_t *result)
+{
+ uint32_t tmp = 0;
+ int i = 0;
+
+ /* Trigger decrypt operation */
+
+ AES_CTRL_REG |= AES_CTRL_CODEC_TRIG;
+
+ /* Set the key */
+
+ for (i = 0; i < 16; i++)
+ {
+ AES_KEY_REG(i) = key[i];
+ }
+
+ /* Feed data to hardware */
+
+ while (AES_CTRL_REG & AES_CTRL_DATA_FEED)
+ {
+ tmp = data[0] + (data[1] << 8) + (data[2] << 16) + (data[3] << 24);
+ AES_DATA_REG = tmp;
+ data += 4;
+ }
+
+ /* Wait for decrypt finished */
+
+ while ((AES_CTRL_REG & AES_CTRL_CODEC_FINISHED) == 0);
+
+ /* Assign the result */
+
+ for (i = 0; i < 4; i++)
+ {
+ tmp = AES_DATA_REG;
+ *result++ = tmp & 0xff;
+ *result++ = (tmp >> 8) & 0xff;
+ *result++ = (tmp >> 16) & 0xff;
+ *result++ = (tmp >> 24) & 0xff;
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int aes_cypher(void *out, const void *in, size_t size, const void *iv,
+ const void *key, size_t keysize, int mode, int encrypt)
+{
+ int ret = OK;
+ int i;
+ int nblk;
+
+ const uint8_t *inbuf = (const uint8_t *)in;
+ uint8_t *outbuf = (uint8_t *)out;
+
+ /* Input check, error condition:
+ * 1. size == 0 or size is not aligned with AES_BLK_SIZE
+ * 2. not ECB mode, tlsr82 only support ECB mode
+ * 3. not aes-128, tlsr82 only support aes-128
+ */
+
+ if (!size || (size & (AES_BLK_SIZE - 1)))
Review Comment:
Done
##########
arch/arm/src/tlsr82/tlsr82_aes.c:
##########
@@ -0,0 +1,255 @@
+/****************************************************************************
+ * arch/arm/src/tlsr82/tlsr82_aes.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/crypto/crypto.h>
+#include <nuttx/semaphore.h>
+#include <assert.h>
+#include <debug.h>
+#include <semaphore.h>
+
+#include "hardware/tlsr82_aes.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define AES_BLK_SHIFT (4)
+#define AES_BLK_SIZE (1 << AES_BLK_SHIFT)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private data
+ ****************************************************************************/
+
+static sem_t g_aes_sem = SEM_INITIALIZER(1);
+
+/****************************************************************************
+ * Public data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: tlsr82_aes_encrypt
+ *
+ * Description:
+ * This function servers to perform aes_128 encryption for 16-Byte input
+ * data with specific 16-Byte key.
+ *
+ * Input Parameters:
+ * key - the pointer to the 16-Byte key
+ * data - the pointer to the 16-Byte plain text
+ * result - the pointer to the encryption result cipher text
+ *
+ * Returned Value:
+ * 0: Success, not 0: Failure
+ *
+ ****************************************************************************/
+
+int tlsr82_aes_encrypt(const uint8_t *key, const uint8_t *data,
+ uint8_t *result)
+{
+ uint32_t tmp;
+ int i;
+
+ /* Trigger encrypt operation */
+
+ AES_CTRL_REG &= (~AES_CTRL_CODEC_TRIG);
Review Comment:
Done
##########
arch/arm/src/tlsr82/tlsr82_aes.c:
##########
@@ -0,0 +1,255 @@
+/****************************************************************************
+ * arch/arm/src/tlsr82/tlsr82_aes.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/crypto/crypto.h>
+#include <nuttx/semaphore.h>
+#include <assert.h>
+#include <debug.h>
+#include <semaphore.h>
+
+#include "hardware/tlsr82_aes.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define AES_BLK_SHIFT (4)
+#define AES_BLK_SIZE (1 << AES_BLK_SHIFT)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private data
+ ****************************************************************************/
+
+static sem_t g_aes_sem = SEM_INITIALIZER(1);
Review Comment:
Done
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