chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/crypto/fipsmodule/rand/internal.h

@@ -0,0 +1,55 @@
+// Copyright (c) 2015, Google Inc.
+// SPDX-License-Identifier: ISC
+
+#ifndef OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H
+#define OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H
+
+#include <openssl/aes.h>
+#include <openssl/ctrdrbg.h>
+#include <openssl/rand.h>
+
+#include "../../internal.h"
+#include "../modes/internal.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+// kCtrDrbgReseedInterval is the number of generate calls made to CTR-DRBG,
+// for a specific state, before reseeding.
+static const uint64_t kCtrDrbgReseedInterval = 4096;
+
+#define RAND_NO_USER_PRED_RESISTANCE 0
+#define RAND_USE_USER_PRED_RESISTANCE 1
+
+OPENSSL_EXPORT uint64_t get_private_thread_generate_calls_since_seed(void);
+OPENSSL_EXPORT uint64_t get_private_thread_reseed_calls_since_initialization(void);
+
+OPENSSL_EXPORT uint64_t get_public_thread_generate_calls_since_seed(void);
+OPENSSL_EXPORT uint64_t get_public_thread_reseed_calls_since_initialization(void);
+
+// CTR_DRBG_STATE contains the state of a CTR_DRBG based on AES-256. See SP
+// 800-90Ar1.
+struct ctr_drbg_state_st {
+  AES_KEY ks;
+  block128_f block;
+  ctr128_f ctr;
+  uint8_t counter[16];
+  uint64_t reseed_counter;
+};
+OPENSSL_STATIC_ASSERT((sizeof((struct ctr_drbg_state_st*)0)->reseed_counter) * 8 >= 48, value_can_overflow)
+
+// CTR_DRBG_init initialises |*drbg| given |CTR_DRBG_ENTROPY_LEN| bytes of
+// entropy in |entropy| and, optionally, a personalization string up to
+// |CTR_DRBG_ENTROPY_LEN| bytes in length. It returns one on success and zero
+// on error. |entropy| and |personalization| must not alias.
+OPENSSL_EXPORT int CTR_DRBG_init(CTR_DRBG_STATE *drbg,
+                                 const uint8_t entropy[CTR_DRBG_ENTROPY_LEN],
+                                 const uint8_t *personalization,
+                                 size_t personalization_len);
+
+#if defined(__cplusplus)
+}  // extern C
+#endif
+
+#endif  // OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H