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Diffstat (limited to 'src/crypto/int-util.h')
| -rw-r--r-- | src/crypto/int-util.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/crypto/int-util.h b/src/crypto/int-util.h new file mode 100644 index 000000000..933f2e784 --- /dev/null +++ b/src/crypto/int-util.h @@ -0,0 +1,121 @@ +#pragma once + +#include <stdint.h> +#include <string.h> +#include <sys/param.h> + +static inline uint32_t rol32(uint32_t x, int r) { + return (x << (r & 31)) | (x >> (-r & 31)); +} + +static inline uint64_t rol64(uint64_t x, int r) { + return (x << (r & 63)) | (x >> (-r & 63)); +} + +#define IDENT32(x) ((uint32_t) (x)) +#define IDENT64(x) ((uint64_t) (x)) + +#define SWAP32(x) ((((uint32_t) (x) & 0x000000ff) << 24) | \ + (((uint32_t) (x) & 0x0000ff00) << 8) | \ + (((uint32_t) (x) & 0x00ff0000) >> 8) | \ + (((uint32_t) (x) & 0xff000000) >> 24)) +#define SWAP64(x) ((((uint64_t) (x) & 0x00000000000000ff) << 56) | \ + (((uint64_t) (x) & 0x000000000000ff00) << 40) | \ + (((uint64_t) (x) & 0x0000000000ff0000) << 24) | \ + (((uint64_t) (x) & 0x00000000ff000000) << 8) | \ + (((uint64_t) (x) & 0x000000ff00000000) >> 8) | \ + (((uint64_t) (x) & 0x0000ff0000000000) >> 24) | \ + (((uint64_t) (x) & 0x00ff000000000000) >> 40) | \ + (((uint64_t) (x) & 0xff00000000000000) >> 56)) + +static inline uint32_t ident32(uint32_t x) { return x; } +static inline uint64_t ident64(uint64_t x) { return x; } + +static inline uint32_t swap32(uint32_t x) { + x = ((x & 0x00ff00ff) << 8) | ((x & 0xff00ff00) >> 8); + return (x << 16) | (x >> 16); +} +static inline uint64_t swap64(uint64_t x) { + x = ((x & 0x00ff00ff00ff00ff) << 8) | ((x & 0xff00ff00ff00ff00) >> 8); + x = ((x & 0x0000ffff0000ffff) << 16) | ((x & 0xffff0000ffff0000) >> 16); + return (x << 32) | (x >> 32); +} + +#if defined(__GNUC__) +#define UNUSED __attribute__((unused)) +#else +#define UNUSED +#endif +static inline void mem_inplace_ident(void *mem UNUSED, size_t n UNUSED) { } +#undef UNUSED + +static inline void mem_inplace_swap32(void *mem, size_t n) { + size_t i; + for (i = 0; i < n; i++) { + ((uint32_t *) mem)[i] = swap32(((const uint32_t *) mem)[i]); + } +} +static inline void mem_inplace_swap64(void *mem, size_t n) { + size_t i; + for (i = 0; i < n; i++) { + ((uint64_t *) mem)[i] = swap64(((const uint64_t *) mem)[i]); + } +} + +static inline void memcpy_ident32(void *dst, const void *src, size_t n) { + memcpy(dst, src, 4 * n); +} +static inline void memcpy_ident64(void *dst, const void *src, size_t n) { + memcpy(dst, src, 8 * n); +} + +static inline void memcpy_swap32(void *dst, const void *src, size_t n) { + size_t i; + for (i = 0; i < n; i++) { + ((uint32_t *) dst)[i] = swap32(((const uint32_t *) src)[i]); + } +} +static inline void memcpy_swap64(void *dst, const void *src, size_t n) { + size_t i; + for (i = 0; i < n; i++) { + ((uint64_t *) dst)[i] = swap64(((const uint64_t *) src)[i]); + } +} + +#if BYTE_ORDER == LITTLE_ENDIAN +#define SWAP32LE IDENT32 +#define SWAP32BE SWAP32 +#define swap32le ident32 +#define swap32be swap32 +#define mem_inplace_swap32le mem_inplace_ident +#define mem_inplace_swap32be mem_inplace_swap32 +#define memcpy_swap32le memcpy_ident32 +#define memcpy_swap32be memcpy_swap32 +#define SWAP64LE IDENT64 +#define SWAP64BE SWAP64 +#define swap64le ident64 +#define swap64be swap64 +#define mem_inplace_swap64le mem_inplace_ident +#define mem_inplace_swap64be mem_inplace_swap64 +#define memcpy_swap64le memcpy_ident64 +#define memcpy_swap64be memcpy_swap64 +#endif + +#if BYTE_ORDER == BIG_ENDIAN +#define SWAP32BE IDENT32 +#define SWAP32LE SWAP32 +#define swap32be ident32 +#define swap32le swap32 +#define mem_inplace_swap32be mem_inplace_ident +#define mem_inplace_swap32le mem_inplace_swap32 +#define memcpy_swap32be memcpy_ident32 +#define memcpy_swap32le memcpy_swap32 +#define SWAP64BE IDENT64 +#define SWAP64LE SWAP64 +#define swap64be ident64 +#define swap64le swap64 +#define mem_inplace_swap64be mem_inplace_ident +#define mem_inplace_swap64le mem_inplace_swap64 +#define memcpy_swap64be memcpy_ident64 +#define memcpy_swap64le memcpy_swap64 +#endif
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