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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/siphash.h>#include <linux/unaligned.h>
#if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64#include <linux/dcache.h>#include <asm/word-at-a-time.h>#endif
#define SIPROUND SIPHASH_PERMUTATION(v0, v1, v2, v3)
#define PREAMBLE(len) \ u64 v0 = SIPHASH_CONST_0; \ u64 v1 = SIPHASH_CONST_1; \ u64 v2 = SIPHASH_CONST_2; \ u64 v3 = SIPHASH_CONST_3; \ u64 b = ((u64)(len)) << 56; \ v3 ^= key->key[1]; \ v2 ^= key->key[0]; \ v1 ^= key->key[1]; \ v0 ^= key->key[0];
#define POSTAMBLE \ v3 ^= b; \ SIPROUND; \ SIPROUND; \ v0 ^= b; \ v2 ^= 0xff; \ SIPROUND; \ SIPROUND; \ SIPROUND; \ SIPROUND; \ return (v0 ^ v1) ^ (v2 ^ v3);
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESSu64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u64)); const u8 left = len & (sizeof(u64) - 1); u64 m; PREAMBLE(len) for (; data != end; data += sizeof(u64)) { m = le64_to_cpup(data); v3 ^= m; SIPROUND; SIPROUND; v0 ^= m; }#if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 if (left) b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left)));#else switch (left) { case 7: b |= ((u64)end[6]) << 48; fallthrough; case 6: b |= ((u64)end[5]) << 40; fallthrough; case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; }#endif POSTAMBLE}EXPORT_SYMBOL(__siphash_aligned);#endif
u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u64)); const u8 left = len & (sizeof(u64) - 1); u64 m; PREAMBLE(len) for (; data != end; data += sizeof(u64)) { m = get_unaligned_le64(data); v3 ^= m; SIPROUND; SIPROUND; v0 ^= m; }#if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 if (left) b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left)));#else switch (left) { case 7: b |= ((u64)end[6]) << 48; fallthrough; case 6: b |= ((u64)end[5]) << 40; fallthrough; case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; }#endif POSTAMBLE}EXPORT_SYMBOL(__siphash_unaligned);
/** * siphash_1u64 - compute 64-bit siphash PRF value of a u64 * @first: first u64 * @key: the siphash key */u64 siphash_1u64(const u64 first, const siphash_key_t *key){ PREAMBLE(8) v3 ^= first; SIPROUND; SIPROUND; v0 ^= first; POSTAMBLE}EXPORT_SYMBOL(siphash_1u64);
/** * siphash_2u64 - compute 64-bit siphash PRF value of 2 u64 * @first: first u64 * @second: second u64 * @key: the siphash key */u64 siphash_2u64(const u64 first, const u64 second, const siphash_key_t *key){ PREAMBLE(16) v3 ^= first; SIPROUND; SIPROUND; v0 ^= first; v3 ^= second; SIPROUND; SIPROUND; v0 ^= second; POSTAMBLE}EXPORT_SYMBOL(siphash_2u64);
/** * siphash_3u64 - compute 64-bit siphash PRF value of 3 u64 * @first: first u64 * @second: second u64 * @third: third u64 * @key: the siphash key */u64 siphash_3u64(const u64 first, const u64 second, const u64 third, const siphash_key_t *key){ PREAMBLE(24) v3 ^= first; SIPROUND; SIPROUND; v0 ^= first; v3 ^= second; SIPROUND; SIPROUND; v0 ^= second; v3 ^= third; SIPROUND; SIPROUND; v0 ^= third; POSTAMBLE}EXPORT_SYMBOL(siphash_3u64);
/** * siphash_4u64 - compute 64-bit siphash PRF value of 4 u64 * @first: first u64 * @second: second u64 * @third: third u64 * @forth: forth u64 * @key: the siphash key */u64 siphash_4u64(const u64 first, const u64 second, const u64 third, const u64 forth, const siphash_key_t *key){ PREAMBLE(32) v3 ^= first; SIPROUND; SIPROUND; v0 ^= first; v3 ^= second; SIPROUND; SIPROUND; v0 ^= second; v3 ^= third; SIPROUND; SIPROUND; v0 ^= third; v3 ^= forth; SIPROUND; SIPROUND; v0 ^= forth; POSTAMBLE}EXPORT_SYMBOL(siphash_4u64);
u64 siphash_1u32(const u32 first, const siphash_key_t *key){ PREAMBLE(4) b |= first; POSTAMBLE}EXPORT_SYMBOL(siphash_1u32);
u64 siphash_3u32(const u32 first, const u32 second, const u32 third, const siphash_key_t *key){ u64 combined = (u64)second << 32 | first; PREAMBLE(12) v3 ^= combined; SIPROUND; SIPROUND; v0 ^= combined; b |= third; POSTAMBLE}EXPORT_SYMBOL(siphash_3u32);
#if BITS_PER_LONG == 64/* Note that on 64-bit, we make HalfSipHash1-3 actually be SipHash1-3, for * performance reasons. On 32-bit, below, we actually implement HalfSipHash1-3. */
#define HSIPROUND SIPROUND#define HPREAMBLE(len) PREAMBLE(len)#define HPOSTAMBLE \ v3 ^= b; \ HSIPROUND; \ v0 ^= b; \ v2 ^= 0xff; \ HSIPROUND; \ HSIPROUND; \ HSIPROUND; \ return (v0 ^ v1) ^ (v2 ^ v3);
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESSu32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u64)); const u8 left = len & (sizeof(u64) - 1); u64 m; HPREAMBLE(len) for (; data != end; data += sizeof(u64)) { m = le64_to_cpup(data); v3 ^= m; HSIPROUND; v0 ^= m; }#if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 if (left) b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left)));#else switch (left) { case 7: b |= ((u64)end[6]) << 48; fallthrough; case 6: b |= ((u64)end[5]) << 40; fallthrough; case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; }#endif HPOSTAMBLE}EXPORT_SYMBOL(__hsiphash_aligned);#endif
u32 __hsiphash_unaligned(const void *data, size_t len, const hsiphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u64)); const u8 left = len & (sizeof(u64) - 1); u64 m; HPREAMBLE(len) for (; data != end; data += sizeof(u64)) { m = get_unaligned_le64(data); v3 ^= m; HSIPROUND; v0 ^= m; }#if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 if (left) b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & bytemask_from_count(left)));#else switch (left) { case 7: b |= ((u64)end[6]) << 48; fallthrough; case 6: b |= ((u64)end[5]) << 40; fallthrough; case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; }#endif HPOSTAMBLE}EXPORT_SYMBOL(__hsiphash_unaligned);
/** * hsiphash_1u32 - compute 64-bit hsiphash PRF value of a u32 * @first: first u32 * @key: the hsiphash key */u32 hsiphash_1u32(const u32 first, const hsiphash_key_t *key){ HPREAMBLE(4) b |= first; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_1u32);
/** * hsiphash_2u32 - compute 32-bit hsiphash PRF value of 2 u32 * @first: first u32 * @second: second u32 * @key: the hsiphash key */u32 hsiphash_2u32(const u32 first, const u32 second, const hsiphash_key_t *key){ u64 combined = (u64)second << 32 | first; HPREAMBLE(8) v3 ^= combined; HSIPROUND; v0 ^= combined; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_2u32);
/** * hsiphash_3u32 - compute 32-bit hsiphash PRF value of 3 u32 * @first: first u32 * @second: second u32 * @third: third u32 * @key: the hsiphash key */u32 hsiphash_3u32(const u32 first, const u32 second, const u32 third, const hsiphash_key_t *key){ u64 combined = (u64)second << 32 | first; HPREAMBLE(12) v3 ^= combined; HSIPROUND; v0 ^= combined; b |= third; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_3u32);
/** * hsiphash_4u32 - compute 32-bit hsiphash PRF value of 4 u32 * @first: first u32 * @second: second u32 * @third: third u32 * @forth: forth u32 * @key: the hsiphash key */u32 hsiphash_4u32(const u32 first, const u32 second, const u32 third, const u32 forth, const hsiphash_key_t *key){ u64 combined = (u64)second << 32 | first; HPREAMBLE(16) v3 ^= combined; HSIPROUND; v0 ^= combined; combined = (u64)forth << 32 | third; v3 ^= combined; HSIPROUND; v0 ^= combined; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_4u32);#else#define HSIPROUND HSIPHASH_PERMUTATION(v0, v1, v2, v3)
#define HPREAMBLE(len) \ u32 v0 = HSIPHASH_CONST_0; \ u32 v1 = HSIPHASH_CONST_1; \ u32 v2 = HSIPHASH_CONST_2; \ u32 v3 = HSIPHASH_CONST_3; \ u32 b = ((u32)(len)) << 24; \ v3 ^= key->key[1]; \ v2 ^= key->key[0]; \ v1 ^= key->key[1]; \ v0 ^= key->key[0];
#define HPOSTAMBLE \ v3 ^= b; \ HSIPROUND; \ v0 ^= b; \ v2 ^= 0xff; \ HSIPROUND; \ HSIPROUND; \ HSIPROUND; \ return v1 ^ v3;
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESSu32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u32)); const u8 left = len & (sizeof(u32) - 1); u32 m; HPREAMBLE(len) for (; data != end; data += sizeof(u32)) { m = le32_to_cpup(data); v3 ^= m; HSIPROUND; v0 ^= m; } switch (left) { case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } HPOSTAMBLE}EXPORT_SYMBOL(__hsiphash_aligned);#endif
u32 __hsiphash_unaligned(const void *data, size_t len, const hsiphash_key_t *key){ const u8 *end = data + len - (len % sizeof(u32)); const u8 left = len & (sizeof(u32) - 1); u32 m; HPREAMBLE(len) for (; data != end; data += sizeof(u32)) { m = get_unaligned_le32(data); v3 ^= m; HSIPROUND; v0 ^= m; } switch (left) { case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } HPOSTAMBLE}EXPORT_SYMBOL(__hsiphash_unaligned);
/** * hsiphash_1u32 - compute 32-bit hsiphash PRF value of a u32 * @first: first u32 * @key: the hsiphash key */u32 hsiphash_1u32(const u32 first, const hsiphash_key_t *key){ HPREAMBLE(4) v3 ^= first; HSIPROUND; v0 ^= first; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_1u32);
/** * hsiphash_2u32 - compute 32-bit hsiphash PRF value of 2 u32 * @first: first u32 * @second: second u32 * @key: the hsiphash key */u32 hsiphash_2u32(const u32 first, const u32 second, const hsiphash_key_t *key){ HPREAMBLE(8) v3 ^= first; HSIPROUND; v0 ^= first; v3 ^= second; HSIPROUND; v0 ^= second; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_2u32);
/** * hsiphash_3u32 - compute 32-bit hsiphash PRF value of 3 u32 * @first: first u32 * @second: second u32 * @third: third u32 * @key: the hsiphash key */u32 hsiphash_3u32(const u32 first, const u32 second, const u32 third, const hsiphash_key_t *key){ HPREAMBLE(12) v3 ^= first; HSIPROUND; v0 ^= first; v3 ^= second; HSIPROUND; v0 ^= second; v3 ^= third; HSIPROUND; v0 ^= third; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_3u32);
/** * hsiphash_4u32 - compute 32-bit hsiphash PRF value of 4 u32 * @first: first u32 * @second: second u32 * @third: third u32 * @forth: forth u32 * @key: the hsiphash key */u32 hsiphash_4u32(const u32 first, const u32 second, const u32 third, const u32 forth, const hsiphash_key_t *key){ HPREAMBLE(16) v3 ^= first; HSIPROUND; v0 ^= first; v3 ^= second; HSIPROUND; v0 ^= second; v3 ^= third; HSIPROUND; v0 ^= third; v3 ^= forth; HSIPROUND; v0 ^= forth; HPOSTAMBLE}EXPORT_SYMBOL(hsiphash_4u32);#endif