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Unified Diff: Modules/_blake2/impl/blake2-impl.h

Issue 26798: add BLAKE2 to hashlib
Patch Set: Created 2 years, 11 months ago
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new file mode 100644
index 0000000000000000000000000000000000000000..bbe3c0f1cfcfa55fb8f7830b79acf90737edf146
--- /dev/null
+++ b/Modules/_blake2/impl/blake2-impl.h
@@ -0,0 +1,139 @@
+/*
+ BLAKE2 reference source code package - optimized C implementations
+
+ Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
+ terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
+ your option. The terms of these licenses can be found at:
+
+ - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
+ - OpenSSL license : https://www.openssl.org/source/license.html
+ - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
+
+ More information about the BLAKE2 hash function can be found at
+ https://blake2.net.
+*/
+#pragma once
+#ifndef __BLAKE2_IMPL_H__
+#define __BLAKE2_IMPL_H__
+
+#include <stdint.h>
+#include <string.h>
+
+BLAKE2_LOCAL_INLINE(uint32_t) load32( const void *src )
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+ uint32_t w;
+ memcpy(&w, src, sizeof w);
+ return w;
+#else
+ const uint8_t *p = ( const uint8_t * )src;
+ uint32_t w = *p++;
+ w |= ( uint32_t )( *p++ ) << 8;
+ w |= ( uint32_t )( *p++ ) << 16;
+ w |= ( uint32_t )( *p++ ) << 24;
+ return w;
+#endif
+}
+
+BLAKE2_LOCAL_INLINE(uint64_t) load64( const void *src )
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+ uint64_t w;
+ memcpy(&w, src, sizeof w);
+ return w;
+#else
+ const uint8_t *p = ( const uint8_t * )src;
+ uint64_t w = *p++;
+ w |= ( uint64_t )( *p++ ) << 8;
+ w |= ( uint64_t )( *p++ ) << 16;
+ w |= ( uint64_t )( *p++ ) << 24;
+ w |= ( uint64_t )( *p++ ) << 32;
+ w |= ( uint64_t )( *p++ ) << 40;
+ w |= ( uint64_t )( *p++ ) << 48;
+ w |= ( uint64_t )( *p++ ) << 56;
+ return w;
+#endif
+}
+
+BLAKE2_LOCAL_INLINE(void) store32( void *dst, uint32_t w )
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+ memcpy(dst, &w, sizeof w);
+#else
+ uint8_t *p = ( uint8_t * )dst;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w;
+#endif
+}
+
+BLAKE2_LOCAL_INLINE(void) store64( void *dst, uint64_t w )
+{
+#if defined(NATIVE_LITTLE_ENDIAN)
+ memcpy(dst, &w, sizeof w);
+#else
+ uint8_t *p = ( uint8_t * )dst;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w;
+#endif
+}
+
+BLAKE2_LOCAL_INLINE(uint64_t) load48( const void *src )
+{
+ const uint8_t *p = ( const uint8_t * )src;
+ uint64_t w = *p++;
+ w |= ( uint64_t )( *p++ ) << 8;
+ w |= ( uint64_t )( *p++ ) << 16;
+ w |= ( uint64_t )( *p++ ) << 24;
+ w |= ( uint64_t )( *p++ ) << 32;
+ w |= ( uint64_t )( *p++ ) << 40;
+ return w;
+}
+
+BLAKE2_LOCAL_INLINE(void) store48( void *dst, uint64_t w )
+{
+ uint8_t *p = ( uint8_t * )dst;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w; w >>= 8;
+ *p++ = ( uint8_t )w;
+}
+
+BLAKE2_LOCAL_INLINE(uint32_t) rotl32( const uint32_t w, const unsigned c )
+{
+ return ( w << c ) | ( w >> ( 32 - c ) );
+}
+
+BLAKE2_LOCAL_INLINE(uint64_t) rotl64( const uint64_t w, const unsigned c )
+{
+ return ( w << c ) | ( w >> ( 64 - c ) );
+}
+
+BLAKE2_LOCAL_INLINE(uint32_t) rotr32( const uint32_t w, const unsigned c )
+{
+ return ( w >> c ) | ( w << ( 32 - c ) );
+}
+
+BLAKE2_LOCAL_INLINE(uint64_t) rotr64( const uint64_t w, const unsigned c )
+{
+ return ( w >> c ) | ( w << ( 64 - c ) );
+}
+
+/* prevents compiler optimizing out memset() */
+BLAKE2_LOCAL_INLINE(void) secure_zero_memory(void *v, size_t n)
+{
+ static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
+ memset_v(v, 0, n);
+}
+
+#endif
+
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