-
Notifications
You must be signed in to change notification settings - Fork 17
/
rlwe_rand_openssl_aes.c
59 lines (51 loc) · 1.43 KB
/
rlwe_rand_openssl_aes.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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
#include "rlwe_rand.h"
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int RAND_CHOICE_init(RAND_CTX *rand_ctx) {
int ret = 1;
unsigned char aes_key[16];
unsigned char aes_iv[16];
ret &= RAND_bytes(aes_key, 16);
ret &= RAND_bytes(aes_iv, 16);
EVP_CIPHER_CTX_init(rand_ctx);
ret &= EVP_EncryptInit_ex(rand_ctx, EVP_aes_256_ctr(), NULL, aes_key, aes_iv);
OPENSSL_cleanse(aes_key, sizeof(aes_key));
OPENSSL_cleanse(aes_iv, sizeof(aes_iv));
return ret;
}
void RAND_CHOICE_cleanup(RAND_CTX *rand_ctx) {
EVP_CIPHER_CTX_cleanup(rand_ctx);
}
uint8_t RANDOM8(RAND_CTX *rand_ctx) {
return (uint8_t) RANDOM64(rand_ctx);
}
uint32_t RANDOM32(RAND_CTX *rand_ctx) {
return (uint32_t) RANDOM64(rand_ctx);
}
uint64_t RANDOM64(RAND_CTX *rand_ctx) {
unsigned char in[16] = {0};
unsigned char out[16] = {0};
int outlen;
int ret = EVP_EncryptUpdate(rand_ctx, out, &outlen, in, 16);
if (ret != 1) {
fprintf(stderr, "Randomness generation failed.\n");
abort();
}
uint64_t *x = (uint64_t *) out;
return *x;
}
void RANDOM192(uint64_t r[3], RAND_CTX *rand_ctx) {
unsigned char in[24] = {0};
unsigned char *out = (unsigned char *) r;
int outlen;
int ret = EVP_EncryptUpdate(rand_ctx, out, &outlen, in, 24);
if (ret != 1) {
fprintf(stderr, "Randomness generation failed.\n");
abort();
}
}
void *(*volatile rlwe_memset_volatile)(void *, int, size_t) = memset;