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143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
#ifndef PORTABLE_BLAKE2_IMPL_H
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#define PORTABLE_BLAKE2_IMPL_H
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#include <stdint.h>
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#include <string.h>
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#if defined(_MSC_VER)
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#define BLAKE2_INLINE __inline
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#elif defined(__GNUC__) || defined(__clang__)
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#define BLAKE2_INLINE __inline__
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#else
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#define BLAKE2_INLINE
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#endif
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/* Argon2 Team - Begin Code */
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/*
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Not an exhaustive list, but should cover the majority of modern platforms
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Additionally, the code will always be correct---this is only a performance
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tweak.
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*/
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#if (defined(__BYTE_ORDER__) && \
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(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)) || \
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defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || defined(__MIPSEL__) || \
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defined(__AARCH64EL__) || defined(__amd64__) || defined(__i386__) || \
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defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || \
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defined(_M_ARM)
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#define NATIVE_LITTLE_ENDIAN
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#endif
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/* Argon2 Team - End Code */
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static BLAKE2_INLINE uint32_t load32(const void *src) {
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#if defined(NATIVE_LITTLE_ENDIAN)
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uint32_t w;
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memcpy(&w, src, sizeof w);
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return w;
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#else
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const uint8_t *p = (const uint8_t *)src;
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uint32_t w = *p++;
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w |= (uint32_t)(*p++) << 8;
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w |= (uint32_t)(*p++) << 16;
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w |= (uint32_t)(*p++) << 24;
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return w;
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#endif
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}
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static BLAKE2_INLINE uint64_t load64(const void *src) {
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#if defined(NATIVE_LITTLE_ENDIAN)
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uint64_t w;
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memcpy(&w, src, sizeof w);
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return w;
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#else
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const uint8_t *p = (const uint8_t *)src;
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uint64_t w = *p++;
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w |= (uint64_t)(*p++) << 8;
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w |= (uint64_t)(*p++) << 16;
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w |= (uint64_t)(*p++) << 24;
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w |= (uint64_t)(*p++) << 32;
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w |= (uint64_t)(*p++) << 40;
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w |= (uint64_t)(*p++) << 48;
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w |= (uint64_t)(*p++) << 56;
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return w;
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#endif
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}
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static BLAKE2_INLINE void store32(void *dst, uint32_t w) {
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#if defined(NATIVE_LITTLE_ENDIAN)
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memcpy(dst, &w, sizeof w);
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#else
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uint8_t *p = (uint8_t *)dst;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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#endif
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}
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static BLAKE2_INLINE void store64(void *dst, uint64_t w) {
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#if defined(NATIVE_LITTLE_ENDIAN)
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memcpy(dst, &w, sizeof w);
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#else
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uint8_t *p = (uint8_t *)dst;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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#endif
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}
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static BLAKE2_INLINE uint64_t load48(const void *src) {
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const uint8_t *p = (const uint8_t *)src;
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uint64_t w = *p++;
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w |= (uint64_t)(*p++) << 8;
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w |= (uint64_t)(*p++) << 16;
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w |= (uint64_t)(*p++) << 24;
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w |= (uint64_t)(*p++) << 32;
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w |= (uint64_t)(*p++) << 40;
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return w;
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}
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static BLAKE2_INLINE void store48(void *dst, uint64_t w) {
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uint8_t *p = (uint8_t *)dst;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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w >>= 8;
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*p++ = (uint8_t)w;
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}
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static BLAKE2_INLINE uint32_t rotr32(const uint32_t w, const unsigned c) {
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return (w >> c) | (w << (32 - c));
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}
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static BLAKE2_INLINE uint64_t rotr64(const uint64_t w, const unsigned c) {
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return (w >> c) | (w << (64 - c));
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}
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/* prevents compiler optimizing out memset() */
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static BLAKE2_INLINE void burn(void *v, size_t n) {
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static void *(*const volatile memset_v)(void *, int, size_t) = &memset;
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memset_v(v, 0, n);
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}
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#endif
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