ed25519/src/seed.c

#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
Revision:	1.2
Committed:	Tue Feb 28 19:53:08 2017 UTC (7 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-1_04, rel-1_05, HEAD
Changes since 1.1:	+3 -3 lines
Log Message:	1.04
#	Content
1	#include "ed25519.h"
2
3	#ifndef ED25519_NO_SEED
4
5	#ifdef _WIN32
6	#include <windows.h>
7	#include <wincrypt.h>
8	#else
9	#include <stdio.h>
10	#endif
11
12	int ed25519_create_seed(unsigned char *seed) {
13	#ifdef _WIN32
14	HCRYPTPROV prov;
15
16	if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
17	return 1;
18	}
19
20	if (!CryptGenRandom(prov, 32, seed)) {
21	CryptReleaseContext(prov, 0);
22	return 1;
23	}
24
25	CryptReleaseContext(prov, 0);
26	#else
27	FILE *f = fopen("/dev/urandom", "rb");
28
29	if (f == NULL) {
30	return 1;
31	}
32
33	fread(seed, 1, 32, f);
34	fclose(f);
35	#endif
36
37	return 0;
38	}
39
40	#endif