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Get entropy in windows.

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svn:r1257
This commit is contained in:
Nick Mathewson 2004-03-11 05:14:06 +00:00
parent 14963e4af5
commit 59e2c77824
2 changed files with 43 additions and 0 deletions
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41
src/common/crypto.c
View File

@ -41,6 +41,13 @@
#define RETURN_SSL_OUTCOME(exp) return !(exp) #define RETURN_SSL_OUTCOME(exp) return !(exp)
#endif #endif
#ifdef MS_WINDOWS
#define WIN32_WINNT 0x400
#define _WIN32_WINNT 0x400
#include <windows.h>
#include <wincrypt.h>
#endif
struct crypto_pk_env_t struct crypto_pk_env_t
{ {
int type; int type;
@ -1032,6 +1039,39 @@ void crypto_dh_free(crypto_dh_env_t *dh)
} }
/* random numbers */ /* random numbers */
#ifdef MS_WINDOWS
int crypto_seed_rng()
{
static int provider_set = 0;
static HCRYPTPROV p;
char buf[21];
if (!provider_set) {
if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL, 0)) {
if (GetLastError() != NTE_BAD_KEYSET) {
log_fn(LOG_ERR,"Can't get CryptoAPI provider [1]");
return -1;
}
/* Yes, we need to try it twice. */
if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
CRYPT_NEWKEYSET)) {
log_fn(LOG_ERR,"Can't get CryptoAPI provider [2]");
return -1;
}
}
provider_set = 1;
}
if (!CryptGenRandom(provider, 20, buf)) {
log_fn(LOG_ERR,"Can't get entropy from CryptoAPI.");
return -1;
}
RAND_seed(buf, 20);
/* And add the current screen state to the entopy pool for
* good measure. */
RAND_screen();
return 0;
}
#else
int crypto_seed_rng() int crypto_seed_rng()
{ {
static char *filenames[] = { static char *filenames[] = {
@ -1058,6 +1098,7 @@ int crypto_seed_rng()
log_fn(LOG_WARN, "Cannot seed RNG -- no entropy source found."); log_fn(LOG_WARN, "Cannot seed RNG -- no entropy source found.");
return -1; return -1;
} }
#endif
int crypto_rand(unsigned int n, unsigned char *to) int crypto_rand(unsigned int n, unsigned char *to)
{ {

2
src/or/or.h
View File

@ -86,6 +86,8 @@
#include <io.h> #include <io.h>
#include <process.h> #include <process.h>
#include <direct.h> #include <direct.h>
#define WIN32_WINNT 0x400
#define _WIN32_WINNT 0x400
#define WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN
#include <windows.h> #include <windows.h>
#define snprintf _snprintf #define snprintf _snprintf