Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / third_party / boringssl / crypto / fipsmodule / rand / internal.h

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+/* Copyright (c) 2015, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H
+#define OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H
+
+#include <openssl/aes.h>
+
+#include "../../internal.h"
+#include "../modes/internal.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// RAND_bytes_with_additional_data samples from the RNG after mixing 32 bytes
+// from |user_additional_data| in.
+void RAND_bytes_with_additional_data(uint8_t *out, size_t out_len,
+                                     const uint8_t user_additional_data[32]);
+
+// CRYPTO_sysrand fills |len| bytes at |buf| with entropy from the operating
+// system.
+void CRYPTO_sysrand(uint8_t *buf, size_t len);
+
+// rand_fork_unsafe_buffering_enabled returns whether fork-unsafe buffering has
+// been enabled via |RAND_enable_fork_unsafe_buffering|.
+int rand_fork_unsafe_buffering_enabled(void);
+
+// CTR_DRBG_STATE contains the state of a CTR_DRBG based on AES-256. See SP
+// 800-90Ar1.
+typedef struct {
+  AES_KEY ks;
+  block128_f block;
+  ctr128_f ctr;
+  union {
+    uint8_t bytes[16];
+    uint32_t words[4];
+  } counter;
+  uint64_t reseed_counter;
+} CTR_DRBG_STATE;
+
+// See SP 800-90Ar1, table 3.
+#define CTR_DRBG_ENTROPY_LEN 48
+#define CTR_DRBG_MAX_GENERATE_LENGTH 65536
+
+// 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.
+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);
+
+// CTR_DRBG_reseed reseeds |drbg| given |CTR_DRBG_ENTROPY_LEN| bytes of entropy
+// in |entropy| and, optionally, up to |CTR_DRBG_ENTROPY_LEN| bytes of
+// additional data. It returns one on success or zero on error.
+OPENSSL_EXPORT int CTR_DRBG_reseed(CTR_DRBG_STATE *drbg,
+                                   const uint8_t entropy[CTR_DRBG_ENTROPY_LEN],
+                                   const uint8_t *additional_data,
+                                   size_t additional_data_len);
+
+// CTR_DRBG_generate processes to up |CTR_DRBG_ENTROPY_LEN| bytes of additional
+// data (if any) and then writes |out_len| random bytes to |out|, where
+// |out_len| <= |CTR_DRBG_MAX_GENERATE_LENGTH|. It returns one on success or
+// zero on error.
+OPENSSL_EXPORT int CTR_DRBG_generate(CTR_DRBG_STATE *drbg, uint8_t *out,
+                                     size_t out_len,
+                                     const uint8_t *additional_data,
+                                     size_t additional_data_len);
+
+// CTR_DRBG_clear zeroises the state of |drbg|.
+OPENSSL_EXPORT void CTR_DRBG_clear(CTR_DRBG_STATE *drbg);
+
+
+#if defined(__cplusplus)
+}  // extern C
+#endif
+
+#endif  // OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H