Vergil Cola
Fork of my original MQTTGateway
Diff: easy-connect/stm-spirit1-rf-driver/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Aes.c
- Revision:
- 0:a1734fe1ec4b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/easy-connect/stm-spirit1-rf-driver/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Aes.c Sat Apr 08 14:43:14 2017 +0000
@@ -0,0 +1,319 @@
+/**
+ ******************************************************************************
+ * @file SPIRIT_Aes.c
+ * @author VMA division - AMS
+ * @version 3.2.2
+ * @date 08-July-2015
+ * @brief Configuration and management of SPIRIT AES Engine.
+ *
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+
+/* Includes ------------------------------------------------------------------*/
+#include "SPIRIT_Aes.h"
+#include "MCU_Interface.h"
+
+
+/**
+ * @addtogroup SPIRIT_Libraries
+ * @{
+ */
+
+
+/**
+ * @addtogroup SPIRIT_Aes
+ * @{
+ */
+
+
+/**
+ * @defgroup Aes_Private_TypesDefinitions AES Private Types Definitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Defines AES Private Defines
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Macros AES Private Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Variables AES Private Variables
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_FunctionPrototypes AES Private Function Prototypes
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+
+/**
+ * @defgroup Aes_Private_Functions AES Private Functions
+ * @{
+ */
+
+
+/**
+ * @brief Enables or Disables the AES engine.
+ * @param xNewState new state for AES engine.
+ * This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None
+ */
+void SpiritAesMode(SpiritFunctionalState xNewState)
+{
+ uint8_t tempRegValue = 0x00;
+
+ /* Check the parameters */
+ s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
+
+ /* Modifies the register value */
+ g_xStatus = SpiritSpiReadRegisters(ANA_FUNC_CONF0_BASE, 1, &tempRegValue);
+ if(xNewState == S_ENABLE)
+ {
+ tempRegValue |= AES_MASK;
+ }
+ else
+ {
+ tempRegValue &= ~AES_MASK;
+ }
+
+ /* Writes the ANA_FUNC_CONF0 register to enable or disable the AES engine */
+ g_xStatus = SpiritSpiWriteRegisters(ANA_FUNC_CONF0_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief Writes the data to encrypt or decrypt, or the encryption key for the
+ * derive decryption key operation into the AES_DATA_IN registers.
+ * @param pcBufferDataIn pointer to the user data buffer. The first byte of the array
+ * shall be the MSB byte and it will be put in the AES_DATA_IN[0] register, while
+ * the last one shall be the LSB and it will be put in the AES_DATA_IN[cDataLength-1]
+ * register. If data to write are less than 16 bytes the remaining AES_DATA_IN registers
+ * will be filled with bytes equal to 0. This parameter is an uint8_t*.
+ * @param cDataLength length of data in bytes.
+ * This parameter is an uint8_t.
+ * @retval None
+ */
+void SpiritAesWriteDataIn(uint8_t* pcBufferDataIn, uint8_t cDataLength)
+{
+ uint8_t i, dataInArray[16];
+
+ /* Verifies that there are no more than 16 bytes */
+ (cDataLength>16) ? (cDataLength=16) : cDataLength;
+
+ /* Fill the dataInArray with the data buffer, using padding */
+ for(i=0;i<16;i++)
+ {
+ (i<(16 - cDataLength)) ? (dataInArray[i]=0):(dataInArray[i]=pcBufferDataIn[15-i]);
+
+ }
+
+ /* Writes the AES_DATA_IN registers */
+ g_xStatus = SpiritSpiWriteRegisters(AES_DATA_IN_15_BASE, 16, dataInArray);
+
+}
+
+
+/**
+ * @brief Returns the encrypted or decrypted data or the decription key from the AES_DATA_OUT register.
+ * @param pcBufferDataOut pointer to the user data buffer. The AES_DATA_OUT[0]
+ * register value will be put as first element of the buffer (MSB), while the
+ * AES_DAT_OUT[cDataLength-1] register value will be put as last element of the buffer (LSB).
+ * This parameter is a uint8_t*.
+ * @param cDataLength length of data to read in bytes.
+ * This parameter is a uint8_t.
+ * @retval None
+ */
+void SpiritAesReadDataOut(uint8_t* pcBufferDataOut, uint8_t cDataLength)
+{
+ uint8_t address, dataOutArray[16];
+
+ /* Verifies that there are no more than 16 bytes */
+ (cDataLength>16) ? (cDataLength=16) : cDataLength;
+
+ /* Evaluates the address of AES_DATA_OUT from which start to read */
+ address = AES_DATA_OUT_15_BASE+16-cDataLength;
+
+ /* Reads the exact number of AES_DATA_OUT registers */
+ g_xStatus = (SpiritSpiReadRegisters(address, cDataLength, dataOutArray));
+
+ /* Copy in the user buffer the read values changing the order */
+ for(int i = (cDataLength-1); i>=0; i--)
+ {
+ *pcBufferDataOut = dataOutArray[i];
+ pcBufferDataOut++;
+ }
+
+}
+
+
+/**
+ * @brief Writes the encryption key into the AES_KEY_IN register.
+ * @param pcKey pointer to the buffer of 4 words containing the AES key.
+ * The first byte of the buffer shall be the most significant byte AES_KEY_0 of the AES key.
+ * The last byte of the buffer shall be the less significant byte AES_KEY_15 of the AES key.
+ * This parameter is an uint8_t*.
+ * @retval None
+ */
+void SpiritAesWriteKey(uint8_t* pcKey)
+{
+ uint8_t pcTempKey[16];
+ for (uint8_t i = 0; i < 16; i++)
+ {
+ pcTempKey[15-i] = pcKey[i];
+ }
+
+ /* Writes the AES_DATA_IN registers */
+ g_xStatus = SpiritSpiWriteRegisters(AES_KEY_IN_15_BASE, 16, pcTempKey);
+
+}
+
+/**
+ * @brief Returns the encryption/decryption key from the AES_KEY_IN register.
+ * @param pcKey pointer to the buffer of 4 words (16 bytes) containing the AES key.
+ * The first byte of the buffer shall be the most significant byte AES_KEY_0 of the AES key.
+ * The last byte of the buffer shall be the less significant byte AES_KEY_15 of the AES key.
+ * This parameter is an uint8_t*.
+ * @retval None
+ */
+void SpiritAesReadKey(uint8_t* pcKey)
+{
+ uint8_t pcTempKey[16];
+
+ /* Reads the AES_DATA_IN registers */
+ g_xStatus = SpiritSpiReadRegisters(AES_KEY_IN_15_BASE, 16, pcTempKey);
+
+
+ for (uint8_t i = 0; i < 16; i++)
+ pcKey[i] = pcTempKey[15-i];
+
+}
+
+
+
+/**
+ * @brief Derives the decryption key from a given encryption key.
+ * @param None.
+ * @retval None.
+ */
+void SpiritAesDeriveDecKeyFromEnc(void)
+{
+ /* Sends the COMMAND_AES_KEY command */
+ g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_KEY);
+
+}
+
+
+/**
+ * @brief Executes the encryption operation.
+ * @param None.
+ * @retval None.
+ */
+void SpiritAesExecuteEncryption(void)
+{
+ /* Sends the COMMAND_AES_ENC command */
+ g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_ENC);
+
+}
+
+
+/**
+ * @brief Executes the decryption operation.
+ * @param None.
+ * @retval None.
+ */
+void SpiritAesExecuteDecryption(void)
+{
+ /* Sends the COMMAND_AES_DEC command */
+ g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_DEC);
+
+}
+
+
+/**
+ * @brief Executes the key derivation and the decryption operation.
+ * @param None.
+ * @retval None.
+ */
+void SpiritAesDeriveDecKeyExecuteDec(void)
+{
+ /* Sends the COMMAND_AES_KEY_DEC command */
+ g_xStatus = SpiritSpiCommandStrobes(COMMAND_AES_KEY_DEC);
+
+}
+
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+
+
+/******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/