esp_hardware.c 1.8 KB

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  1. /*
  2. * ESPRSSIF MIT License
  3. *
  4. * Copyright (c) 2016 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
  5. *
  6. * Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
  7. * it is free of charge, to any person obtaining a copy of this software and associated
  8. * documentation files (the "Software"), to deal in the Software without restriction, including
  9. * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10. * and/or sell copies of the Software, and to permit persons to whom the Software is furnished
  11. * to do so, subject to the following conditions:
  12. *
  13. * The above copyright notice and this permission notice shall be included in all copies or
  14. * substantial portions of the Software.
  15. *
  16. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  18. * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  19. * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  20. * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22. *
  23. */
  24. #if !defined(MBEDTLS_CONFIG_FILE)
  25. #include "mbedtls/config.h"
  26. #else
  27. #include MBEDTLS_CONFIG_FILE
  28. #endif
  29. #include <sys/types.h>
  30. #include "osapi.h"
  31. #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
  32. /**
  33. * \brief Entropy poll callback for a hardware source
  34. *
  35. * \warning This is not provided by mbed TLS!
  36. * See \c MBEDTLS_ENTROPY_HARDWARE_ALT in config.h.
  37. *
  38. * \note This must accept NULL as its first argument.
  39. */
  40. int mbedtls_hardware_poll( void *data,
  41. unsigned char *output, size_t len, size_t *olen )
  42. {
  43. os_get_random(output, len);
  44. *olen = len;
  45. return 0;
  46. }
  47. #endif