Add entropy functions for STM32F4 and STM32F7 family

hal/targets.json

@@ -773,6 +773,7 @@
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "inherits": ["Target"],
         "progen": {"target": "nucleo-f410rb"},
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "detect_code": ["0740"],
         "device_has": ["ANALOGIN", "ANALOGOUT", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
         "release_versions": ["2", "5"]
@@ -809,7 +810,8 @@
         "extra_labels": ["STM", "STM32F4", "STM32F429", "STM32F429ZI"],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "progen": {"target": "nucleo-f429zi"},
-        "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "RTC_LSI", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
+        "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "RTC_LSI", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
         "detect_code": ["0796"],
         "features": ["IPV4"],
         "release_versions": ["2", "5"]
@@ -856,6 +858,7 @@
         "extra_labels": ["STM", "STM32F7", "STM32F746", "STM32F746ZG"],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "default_toolchain": "ARM",
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "progen": {
             "target": "nucleo-f746zg",
             "iar": {
@@ -874,6 +877,7 @@
         "extra_labels": ["STM", "STM32F7", "STM32F767", "STM32F767ZI"],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "default_toolchain": "ARM",
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "progen": {"target": "nucleo-f767zi"},
         "detect_code": ["0818"],
         "device_has": ["ANALOGIN", "ANALOGOUT", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
@@ -1040,6 +1044,7 @@
         "core": "Cortex-M4F",
         "default_toolchain": "ARM",
         "extra_labels": ["STM", "STM32F4", "STM32F429", "STM32F429ZI"],
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "progen": {"target": "disco-f429zi"},
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "RTC_LSI", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
@@ -1052,6 +1057,7 @@
         "extra_labels": ["STM", "STM32F4", "STM32F469", "STM32F469NI"],
         "supported_toolchains": ["ARM", "uARM", "IAR", "GCC_ARM"],
         "inherits": ["Target"],
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "progen": {"target": "disco-f469ni"},
         "detect_code": ["0788"],
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],
@@ -1073,6 +1079,7 @@
         "extra_labels": ["STM", "STM32F7", "STM32F746", "STM32F746NG"],
         "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
         "default_toolchain": "ARM",
+        "macros": ["MBEDTLS_ENTROPY_HARDWARE_ALT"],
         "progen": {"target": "disco-f746ng"},
         "detect_code": ["0815"],
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"],

hal/targets/hal/TARGET_STM/TARGET_STM32F4/entropy_hardware_poll.c

@@ -0,0 +1,85 @@
+/*
+ *  Hardware entropy collector for the STM32F4 family
+ *
+ *  Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
+ *  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.
+ *
+ */
+
+
+#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) ||\
+    defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\
+    defined(STM32F410Tx) || defined(STM32F410Cx) || defined(STM32F410Rx) || defined(STM32F469xx) ||\
+    defined(STM32F479xx)
+
+#include <stdlib.h>
+#include "cmsis.h"
+
+/* RNG handler declaration */
+RNG_HandleTypeDef RngHandle;
+
+/*
+ * Get one byte of entropy from the RNG, assuming it is up and running.
+ */
+static void rng_get_byte( unsigned char *byte )
+{
+    *byte = (unsigned char)HAL_RNG_GetRandomNumber(&RngHandle);
+}
+
+/*
+ * Get len bytes of entropy from the hardware RNG.
+ */
+int mbedtls_hardware_poll( void *data,
+                    unsigned char *output, size_t len, size_t *olen )
+{
+    size_t i;
+    int ret;
+    ((void) data);
+
+    /* RNG Peripheral clock enable */
+    __HAL_RCC_RNG_CLK_ENABLE();
+
+    /* Initialize RNG instance */
+    RngHandle.Instance = RNG;
+    HAL_RNG_Init(&RngHandle);
+
+    /* Get Random byte */
+    for( i = 0; i < len; i++ ){
+        rng_get_byte( output + i );
+        printf("output %i: %i\n",i,(int)*(output+i));
+
+    }
+    /* Just be extra sure that we didn't do it wrong */
+    if( ( __HAL_RNG_GET_FLAG(&RngHandle, (RNG_FLAG_CECS|RNG_FLAG_SECS)) ) != 0 )
+    {
+        ret = -1;
+        goto cleanup;
+    }
+
+    *olen = len;
+    ret = 0;
+
+cleanup:
+    /*Disable the RNG peripheral */
+    HAL_RNG_DeInit(&RngHandle);
+    /* RNG Peripheral clock disable - assume we're the only users of RNG  */
+    __HAL_RCC_RNG_CLK_DISABLE();
+
+
+    return( ret );
+}
+#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx ||\
+          STM32F429xx || STM32F439xx || STM32F410xx || STM32F469xx || STM32F479xx */
+

hal/targets/hal/TARGET_STM/TARGET_STM32F7/entropy_hardware_poll.c

@@ -0,0 +1,77 @@
+/*
+ *  Hardware entropy collector for the STM32F7 family
+ *
+ *  Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
+ *  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.
+ *
+ */
+
+
+#include <stdlib.h>
+#include "cmsis.h"
+
+/* RNG handler declaration */
+RNG_HandleTypeDef RngHandle;
+
+/*
+ * Get one byte of entropy from the RNG, assuming it is up and running.
+ */
+static void rng_get_byte( unsigned char *byte )
+{
+    *byte = (unsigned char)HAL_RNG_GetRandomNumber(&RngHandle);
+}
+
+/*
+ * Get len bytes of entropy from the hardware RNG.
+ */
+int mbedtls_hardware_poll( void *data,
+                    unsigned char *output, size_t len, size_t *olen )
+{
+    size_t i;
+    int ret;
+    ((void) data);
+
+    /* RNG Peripheral clock enable */
+    __HAL_RCC_RNG_CLK_ENABLE();
+
+    /* Initialize RNG instance */
+    RngHandle.Instance = RNG;
+    HAL_RNG_Init(&RngHandle);
+
+
+    /* Get Random byte */
+    for( i = 0; i < len; i++ )
+        rng_get_byte( output + i );
+
+    /* Just be extra sure that we didn't do it wrong */
+    if( ( __HAL_RNG_GET_FLAG(&RngHandle, (RNG_FLAG_CECS|RNG_FLAG_SECS)) ) != 0 )
+    {
+        ret = -1;
+        goto cleanup;
+    }
+
+    *olen = len;
+    ret = 0;
+
+cleanup:
+    /*Disable the RNG peripheral */
+    HAL_RNG_DeInit(&RngHandle);
+    /* RNG Peripheral clock disable - assume we're the only users of RNG  */
+    __HAL_RCC_RNG_CLK_DISABLE();
+
+
+    return( ret );
+}
+