Remove the curve448/decaf sub-directory

Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

1 files changed, 102 insertions, 0 deletions

diff --git a/crypto/ec/curve448/curve448utils.h b/crypto/ec/curve448/curve448utils.h
new file mode 100644
index 0000000000..71f8795e6e
--- /dev/null
+++ b/crypto/ec/curve448/curve448utils.h
@@ -0,0 +1,102 @@
+/**
+ * @file decaf/common.h
+ * @author Mike Hamburg
+ *
+ * @copyright
+ *   Copyright (c) 2015 Cryptography Research, Inc.  \n
+ *   Released under the MIT License.  See LICENSE.txt for license information.
+ *
+ * @brief Common utility headers for Decaf library.
+ */
+
+#ifndef __DECAF_COMMON_H__
+#define __DECAF_COMMON_H__ 1
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Goldilocks' build flags default to hidden and stripping executables. */
+/** @cond internal */
+#if defined(DOXYGEN) && !defined(__attribute__)
+#define __attribute__((x))
+#endif
+#define DECAF_API_VIS __attribute__((visibility("default")))
+#define DECAF_NOINLINE  __attribute__((noinline))
+#define DECAF_WARN_UNUSED __attribute__((warn_unused_result))
+#define DECAF_NONNULL __attribute__((nonnull))
+#define DECAF_INLINE inline __attribute__((always_inline,unused))
+/** @endcond */
+
+/* Internal word types.
+ *
+ * Somewhat tricky.  This could be decided separately per platform.  However,
+ * the structs do need to be all the same size and alignment on a given
+ * platform to support dynamic linking, since even if you header was built
+ * with eg arch_neon, you might end up linking a library built with arch_arm32.
+ */
+#ifndef DECAF_WORD_BITS
+    #if (defined(__ILP64__) || defined(__amd64__) || defined(__x86_64__) || (((__UINT_FAST32_MAX__)>>30)>>30))
+        #define DECAF_WORD_BITS 64 /**< The number of bits in a word */
+    #else
+        #define DECAF_WORD_BITS 32 /**< The number of bits in a word */
+    #endif
+#endif
+    
+#if DECAF_WORD_BITS == 64
+typedef uint64_t decaf_word_t;      /**< Word size for internal computations */
+typedef int64_t decaf_sword_t;      /**< Signed word size for internal computations */
+typedef uint64_t decaf_bool_t;      /**< "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
+typedef __uint128_t decaf_dword_t;  /**< Double-word size for internal computations */
+typedef __int128_t decaf_dsword_t;  /**< Signed double-word size for internal computations */
+#elif DECAF_WORD_BITS == 32         /**< The number of bits in a word */
+typedef uint32_t decaf_word_t;      /**< Word size for internal computations */
+typedef int32_t decaf_sword_t;      /**< Signed word size for internal computations */
+typedef uint32_t decaf_bool_t;      /**< "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
+typedef uint64_t decaf_dword_t;     /**< Double-word size for internal computations */
+typedef int64_t decaf_dsword_t;     /**< Signed double-word size for internal computations */
+#else
+#error "Only supporting DECAF_WORD_BITS = 32 or 64 for now"
+#endif
+    
+/** DECAF_TRUE = -1 so that DECAF_TRUE & x = x */
+static const decaf_bool_t DECAF_TRUE = -(decaf_bool_t)1;
+
+/** DECAF_FALSE = 0 so that DECAF_FALSE & x = 0 */
+static const decaf_bool_t DECAF_FALSE = 0;
+
+/** Another boolean type used to indicate success or failure. */
+typedef enum {
+    DECAF_SUCCESS = -1, /**< The operation succeeded. */
+    DECAF_FAILURE = 0   /**< The operation failed. */
+} decaf_error_t;
+
+
+/** Return success if x is true */
+static DECAF_INLINE decaf_error_t
+decaf_succeed_if(decaf_bool_t x) {
+    return (decaf_error_t)x;
+}
+
+/** Return DECAF_TRUE iff x == DECAF_SUCCESS */
+static DECAF_INLINE decaf_bool_t
+decaf_successful(decaf_error_t e) {
+    decaf_dword_t w = ((decaf_word_t)e) ^  ((decaf_word_t)DECAF_SUCCESS);
+    return (w-1)>>DECAF_WORD_BITS;
+}
+    
+/** Overwrite data with zeros.  Uses memset_s if available. */
+void decaf_bzero (
+    void *data,
+    size_t size
+) DECAF_NONNULL DECAF_API_VIS;
+
+    
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+    
+#endif /* __DECAF_COMMON_H__ */