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win32: Allocate the wrapper for crypt provider handle first

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Also use a typed data.
This commit is contained in:
Nobuyoshi Nakada 2024-06-06 10:34:01 +09:00
parent 0396050f5a
commit 5b4734d51d
1 changed files with 11 additions and 7 deletions
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18
random.c
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@ -566,8 +566,6 @@ fill_random_bytes_syscall(void *buf, size_t size, int unused)
#endif
# if defined(CRYPT_VERIFYCONTEXT)
STATIC_ASSERT(sizeof_HCRYPTPROV, sizeof(HCRYPTPROV) == sizeof(size_t));
/* Although HCRYPTPROV is not a HANDLE, it looks like
* INVALID_HANDLE_VALUE is not a valid value */
static const HCRYPTPROV INVALID_HCRYPTPROV = (HCRYPTPROV)INVALID_HANDLE_VALUE;
@ -576,27 +574,33 @@ static void
release_crypt(void *p)
{
HCRYPTPROV *ptr = p;
HCRYPTPROV prov = (HCRYPTPROV)ATOMIC_SIZE_EXCHANGE(*ptr, INVALID_HCRYPTPROV);
HCRYPTPROV prov = (HCRYPTPROV)ATOMIC_PTR_EXCHANGE(*ptr, INVALID_HCRYPTPROV);
if (prov && prov != INVALID_HCRYPTPROV) {
CryptReleaseContext(prov, 0);
}
}
static const rb_data_type_t crypt_prov_type = {
"HCRYPTPROV",
{0, release_crypt,},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_EMBEDDABLE
};
static int
fill_random_bytes_crypt(void *seed, size_t size)
{
static HCRYPTPROV perm_prov;
HCRYPTPROV prov = perm_prov, old_prov;
if (!prov) {
VALUE wrapper = TypedData_Wrap_Struct(0, &crypt_prov_type, 0);
if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
prov = INVALID_HCRYPTPROV;
}
old_prov = (HCRYPTPROV)ATOMIC_SIZE_CAS(perm_prov, 0, prov);
old_prov = (HCRYPTPROV)ATOMIC_PTR_CAS(perm_prov, 0, prov);
if (LIKELY(!old_prov)) { /* no other threads acquired */
if (prov != INVALID_HCRYPTPROV) {
#undef RUBY_UNTYPED_DATA_WARNING
#define RUBY_UNTYPED_DATA_WARNING 0
rb_vm_register_global_object(Data_Wrap_Struct(0, 0, release_crypt, &perm_prov));
DATA_PTR(wrapper) = (void *)prov;
rb_vm_register_global_object(wrapper);
}
}
else { /* another thread acquired */