2G ems initial

2024-03-13 09:30:40 +08:00
commit eed6460ad2
1234 changed files with 419571 additions and 0 deletions
--- a/include/nettle/yarrow.h
+++ b/include/nettle/yarrow.h
@@ -0,0 +1,145 @@
+/* yarrow.h
+
+   The yarrow pseudo-randomness generator.
+
+   Copyright (C) 2001 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+ 
+#ifndef NETTLE_YARROW_H_INCLUDED
+#define NETTLE_YARROW_H_INCLUDED
+
+#include "aes.h"
+#include "sha2.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define yarrow256_init nettle_yarrow256_init
+#define yarrow256_seed nettle_yarrow256_seed
+#define yarrow256_update nettle_yarrow256_update
+#define yarrow256_random nettle_yarrow256_random
+#define yarrow256_is_seeded nettle_yarrow256_is_seeded
+#define yarrow256_needed_sources nettle_yarrow256_needed_sources
+#define yarrow256_fast_reseed nettle_yarrow256_fast_reseed
+#define yarrow256_slow_reseed nettle_yarrow256_slow_reseed
+#define yarrow_key_event_init nettle_yarrow_key_event_init
+#define yarrow_key_event_estimate nettle_yarrow_key_event_estimate
+
+/* Obsolete alias for backwards compatibility. Will be deleted in some
+   later version. */
+#define yarrow256_force_reseed yarrow256_slow_reseed
+  
+enum yarrow_pool_id { YARROW_FAST = 0, YARROW_SLOW = 1 };
+
+struct yarrow_source
+{
+  /* Indexed by yarrow_pool_id */
+  uint32_t estimate[2];
+  
+  /* The pool next sample should go to. */
+  enum yarrow_pool_id next;
+};
+
+
+#define YARROW256_SEED_FILE_SIZE (2 * AES_BLOCK_SIZE)
+
+/* Yarrow-256, based on SHA-256 and AES-256 */
+struct yarrow256_ctx
+{
+  /* Indexed by yarrow_pool_id */
+  struct sha256_ctx pools[2];
+
+  int seeded;
+
+  /* The current key and counter block */
+  struct aes256_ctx key;
+  uint8_t counter[AES_BLOCK_SIZE];
+
+  /* The entropy sources */
+  unsigned nsources;
+  struct yarrow_source *sources;
+};
+
+void
+yarrow256_init(struct yarrow256_ctx *ctx,
+	       unsigned nsources,
+	       struct yarrow_source *sources);
+
+void
+yarrow256_seed(struct yarrow256_ctx *ctx,
+	       size_t length,
+	       const uint8_t *seed_file);
+
+/* Returns 1 on reseed */
+int
+yarrow256_update(struct yarrow256_ctx *ctx,
+		 unsigned source, unsigned entropy,
+		 size_t length, const uint8_t *data);
+
+void
+yarrow256_random(struct yarrow256_ctx *ctx, size_t length, uint8_t *dst);
+
+int
+yarrow256_is_seeded(struct yarrow256_ctx *ctx);
+
+unsigned
+yarrow256_needed_sources(struct yarrow256_ctx *ctx);
+
+void
+yarrow256_fast_reseed(struct yarrow256_ctx *ctx);
+
+void
+yarrow256_slow_reseed(struct yarrow256_ctx *ctx);
+
+
+/* Key event estimator */
+#define YARROW_KEY_EVENT_BUFFER 16
+
+struct yarrow_key_event_ctx
+{
+  /* Counter for initial priming of the state */
+  unsigned index;
+  unsigned chars[YARROW_KEY_EVENT_BUFFER];
+  unsigned previous;
+};
+
+void
+yarrow_key_event_init(struct yarrow_key_event_ctx *ctx);
+
+unsigned
+yarrow_key_event_estimate(struct yarrow_key_event_ctx *ctx,
+			  unsigned key, unsigned time);
+  
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_YARROW_H_INCLUDED */