95 lines
2.3 KiB
PHP
95 lines
2.3 KiB
PHP
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/* Copyright 2015, Kenneth MacKay. Licensed under the BSD 2-clause license. */
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#ifndef _UECC_PLATFORM_SPECIFIC_H_
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#define _UECC_PLATFORM_SPECIFIC_H_
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#include "types.h"
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#if (defined(_WIN32) || defined(_WIN64))
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/* Windows */
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// use pragma syntax to prevent tweaking the linker script for getting CryptXYZ function
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#pragma comment(lib, "crypt32.lib")
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#pragma comment(lib, "advapi32.lib")
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <wincrypt.h>
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static int default_RNG(uint8_t *dest, unsigned size) {
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HCRYPTPROV prov;
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if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
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return 0;
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}
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CryptGenRandom(prov, size, (BYTE *)dest);
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CryptReleaseContext(prov, 0);
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return 1;
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}
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#define default_RNG_defined 1
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#elif defined(unix) || defined(__linux__) || defined(__unix__) || defined(__unix) || \
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(defined(__APPLE__) && defined(__MACH__)) || defined(uECC_POSIX)
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/* Some POSIX-like system with /dev/urandom or /dev/random. */
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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static int default_RNG(uint8_t *dest, unsigned size) {
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int fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
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if (fd == -1) {
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fd = open("/dev/random", O_RDONLY | O_CLOEXEC);
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if (fd == -1) {
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return 0;
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}
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}
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char *ptr = (char *)dest;
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size_t left = size;
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while (left > 0) {
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ssize_t bytes_read = read(fd, ptr, left);
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if (bytes_read <= 0) { // read failed
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close(fd);
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return 0;
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}
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left -= bytes_read;
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ptr += bytes_read;
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}
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close(fd);
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return 1;
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}
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#define default_RNG_defined 1
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#elif defined(RIOT_VERSION)
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#include <random.h>
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static int default_RNG(uint8_t *dest, unsigned size) {
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random_bytes(dest, size);
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return 1;
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}
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#define default_RNG_defined 1
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#elif defined(NRF52_SERIES)
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#include "app_error.h"
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#include "nrf_crypto_rng.h"
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static int default_RNG(uint8_t *dest, unsigned size)
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{
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// make sure to call nrf_crypto_init and nrf_crypto_rng_init first
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ret_code_t ret_code = nrf_crypto_rng_vector_generate(dest, size);
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return (ret_code == NRF_SUCCESS) ? 1 : 0;
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}
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#define default_RNG_defined 1
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#endif /* platform */
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#endif /* _UECC_PLATFORM_SPECIFIC_H_ */
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