3rd_party/ed25519/seed.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

#include "ed25519.h"

#ifndef ED25519_NO_SEED

#ifdef _WIN32
#include <windows.h>
#include <wincrypt.h>
#else
#include <stdio.h>
#endif

int ed25519_create_seed(unsigned char *seed) {
#ifdef _WIN32
    HCRYPTPROV prov;

    if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))  {
        return 1;
    }

    if (!CryptGenRandom(prov, 32, seed))  {
        CryptReleaseContext(prov, 0);
        return 1;
    }

    CryptReleaseContext(prov, 0);
#else
    FILE *f = fopen("/dev/urandom", "rb");

    if (f == NULL) {
        return 1;
    }

    fread(seed, 1, 32, f);
    fclose(f);
#endif

    return 0;
}

#endif