diff options
| author | Clyne Sullivan <clyne@bitgloo.com> | 2021-01-22 21:43:36 -0500 |
|---|---|---|
| committer | Clyne Sullivan <clyne@bitgloo.com> | 2021-01-22 21:43:36 -0500 |
| commit | 48026bb824fd2d9cfb00ecd040db6ef3a416bae9 (patch) | |
| tree | c14713aedfe78ee8b34f2e1252408782e2e2ff5d /ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c | |
| parent | e080a26651f90c88176140d63a74c93c2f4041a2 (diff) | |
upload initial port
Diffstat (limited to 'ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c')
| -rw-r--r-- | ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c b/ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c new file mode 100644 index 0000000..ca11e48 --- /dev/null +++ b/ChibiOS_20.3.2/os/various/wolfssl_bindings/hwrng.c @@ -0,0 +1,80 @@ +/*
+ ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+ 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.
+*/
+/*
+ * **** This file incorporates work covered by the following copyright and ****
+ * **** permission notice: ****
+ *
+ * Copyright (C) 2006-2017 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ *
+ */
+#include <ch.h>
+#include <stdint.h>
+#include "wolfssl_chibios.h"
+#include "user_settings.h"
+
+unsigned int chibios_rand_generate(void)
+{
+ static unsigned int last_value=0;
+ static unsigned int new_value=0;
+ unsigned int error_bits = 0;
+ error_bits = RNG_SR_SEIS | RNG_SR_CEIS;
+ while (new_value==last_value) {
+ /* Check for error flags and if data is ready. */
+ if ( ((RNG->SR & error_bits) == 0) && ( (RNG->SR & RNG_SR_DRDY) == 1 ) )
+ new_value=RNG->DR;
+ }
+ last_value=new_value;
+ return new_value;
+}
+
+int custom_rand_generate_block(unsigned char* output, unsigned int sz)
+{
+ uint32_t i = 0;
+
+ while (i < sz)
+ {
+ /* If not aligned or there is odd/remainder */
+ if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz ||
+ ((uint32_t)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0
+ ) {
+ /* Single byte at a time */
+ output[i++] = (unsigned char)chibios_rand_generate();
+ }
+ else {
+ /* Use native 8, 16, 32 or 64 copy instruction */
+ *((CUSTOM_RAND_TYPE*)&output[i]) = chibios_rand_generate();
+ i += sizeof(CUSTOM_RAND_TYPE);
+ }
+ }
+ return 0;
+}
+
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