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53 lines
1011 B
53 lines
1011 B
#ifndef _WIN32
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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/* it's really stupid that there isn't a syscall for this */
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static int ed25519_random_fd = -1;
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static inline void ed25519_randombytes(unsigned char *x,unsigned long long xlen)
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{
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int i;
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if (ed25519_random_fd == -1) {
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for (;;) {
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ed25519_random_fd = open("/dev/urandom",O_RDONLY);
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if (ed25519_random_fd != -1) break;
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sleep(1);
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}
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}
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while (xlen > 0) {
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if (xlen < 1048576) i = xlen; else i = 1048576;
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i = read(ed25519_random_fd,x,i);
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if (i < 1) {
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sleep(1);
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continue;
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}
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x += i;
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xlen -= i;
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}
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}
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#else
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#include <windows.h>
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#include <wincrypt.h>
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static inline void ed25519_randombytes(unsigned char *x,unsigned long long xlen)
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{
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HCRYPTPROV prov = 0;
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CryptAcquireContextW(&prov, NULL, NULL,
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PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT);
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CryptGenRandom(prov, xlen, x);
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CryptReleaseContext(prov, 0);
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}
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#endif /* _WIN32 */
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