37 lines
675 B
C
37 lines
675 B
C
#include "string.h"
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#include "stdlib.h"
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#include "mbedtls/entropy.h"
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#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
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static int os_get_random(unsigned char *buf, size_t len)
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{
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int i, j;
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unsigned long tmp;
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for (i = 0; i < ((len + 3) & ~3) / 4; i++) {
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tmp = rand();
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for (j = 0; j < 4; j++) {
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if ((i * 4 + j) < len) {
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buf[i * 4 + j] = (unsigned char)(tmp >> (j * 8));
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} else {
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break;
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}
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}
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}
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return 0;
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}
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int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len, size_t *olen)
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{
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os_get_random(output, len);
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*olen = len;
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return 0;
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}
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#endif
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