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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-08-22 14:59:50 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-09-21 10:29:41 +0200 |
commit | 3489e3b6396ee9944a6a2e19e675ca54c36993b4 (patch) | |
tree | cd55cfac1c96ff4b888a9606fd6a0d8eb65bb446 /freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h | |
parent | ck: Define CK_MD_PPC32_LWSYNC if available (diff) | |
download | rtems-libbsd-3489e3b6396ee9944a6a2e19e675ca54c36993b4.tar.bz2 |
Update to FreeBSD head 2018-09-17
Git mirror commit 6c2192b1ef8c50788c751f878552526800b1e319.
Update #3472.
Diffstat (limited to 'freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h')
-rw-r--r-- | freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h b/freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h new file mode 100644 index 00000000..cef64480 --- /dev/null +++ b/freebsd/sys/contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna32.h @@ -0,0 +1,235 @@ +/* + poly1305 implementation using 32 bit * 32 bit = 64 bit multiplication + and 64 bit addition +*/ + +#if defined(_MSC_VER) +# define POLY1305_NOINLINE __declspec(noinline) +#elif defined(__clang__) || defined(__GNUC__) +# define POLY1305_NOINLINE __attribute__((noinline)) +#else +# define POLY1305_NOINLINE +#endif + +#include "private/common.h" + +#define poly1305_block_size 16 + +/* 17 + sizeof(unsigned long long) + 14*sizeof(unsigned long) */ +typedef struct poly1305_state_internal_t { + unsigned long r[5]; + unsigned long h[5]; + unsigned long pad[4]; + unsigned long long leftover; + unsigned char buffer[poly1305_block_size]; + unsigned char final; +} poly1305_state_internal_t; + +static void +poly1305_init(poly1305_state_internal_t *st, const unsigned char key[32]) +{ + /* r &= 0xffffffc0ffffffc0ffffffc0fffffff - wiped after finalization */ + st->r[0] = (LOAD32_LE(&key[0])) & 0x3ffffff; + st->r[1] = (LOAD32_LE(&key[3]) >> 2) & 0x3ffff03; + st->r[2] = (LOAD32_LE(&key[6]) >> 4) & 0x3ffc0ff; + st->r[3] = (LOAD32_LE(&key[9]) >> 6) & 0x3f03fff; + st->r[4] = (LOAD32_LE(&key[12]) >> 8) & 0x00fffff; + + /* h = 0 */ + st->h[0] = 0; + st->h[1] = 0; + st->h[2] = 0; + st->h[3] = 0; + st->h[4] = 0; + + /* save pad for later */ + st->pad[0] = LOAD32_LE(&key[16]); + st->pad[1] = LOAD32_LE(&key[20]); + st->pad[2] = LOAD32_LE(&key[24]); + st->pad[3] = LOAD32_LE(&key[28]); + + st->leftover = 0; + st->final = 0; +} + +static void +poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m, + unsigned long long bytes) +{ + const unsigned long hibit = (st->final) ? 0UL : (1UL << 24); /* 1 << 128 */ + unsigned long r0, r1, r2, r3, r4; + unsigned long s1, s2, s3, s4; + unsigned long h0, h1, h2, h3, h4; + unsigned long long d0, d1, d2, d3, d4; + unsigned long c; + + r0 = st->r[0]; + r1 = st->r[1]; + r2 = st->r[2]; + r3 = st->r[3]; + r4 = st->r[4]; + + s1 = r1 * 5; + s2 = r2 * 5; + s3 = r3 * 5; + s4 = r4 * 5; + + h0 = st->h[0]; + h1 = st->h[1]; + h2 = st->h[2]; + h3 = st->h[3]; + h4 = st->h[4]; + + while (bytes >= poly1305_block_size) { + /* h += m[i] */ + h0 += (LOAD32_LE(m + 0)) & 0x3ffffff; + h1 += (LOAD32_LE(m + 3) >> 2) & 0x3ffffff; + h2 += (LOAD32_LE(m + 6) >> 4) & 0x3ffffff; + h3 += (LOAD32_LE(m + 9) >> 6) & 0x3ffffff; + h4 += (LOAD32_LE(m + 12) >> 8) | hibit; + + /* h *= r */ + d0 = ((unsigned long long) h0 * r0) + ((unsigned long long) h1 * s4) + + ((unsigned long long) h2 * s3) + ((unsigned long long) h3 * s2) + + ((unsigned long long) h4 * s1); + d1 = ((unsigned long long) h0 * r1) + ((unsigned long long) h1 * r0) + + ((unsigned long long) h2 * s4) + ((unsigned long long) h3 * s3) + + ((unsigned long long) h4 * s2); + d2 = ((unsigned long long) h0 * r2) + ((unsigned long long) h1 * r1) + + ((unsigned long long) h2 * r0) + ((unsigned long long) h3 * s4) + + ((unsigned long long) h4 * s3); + d3 = ((unsigned long long) h0 * r3) + ((unsigned long long) h1 * r2) + + ((unsigned long long) h2 * r1) + ((unsigned long long) h3 * r0) + + ((unsigned long long) h4 * s4); + d4 = ((unsigned long long) h0 * r4) + ((unsigned long long) h1 * r3) + + ((unsigned long long) h2 * r2) + ((unsigned long long) h3 * r1) + + ((unsigned long long) h4 * r0); + + /* (partial) h %= p */ + c = (unsigned long) (d0 >> 26); + h0 = (unsigned long) d0 & 0x3ffffff; + d1 += c; + c = (unsigned long) (d1 >> 26); + h1 = (unsigned long) d1 & 0x3ffffff; + d2 += c; + c = (unsigned long) (d2 >> 26); + h2 = (unsigned long) d2 & 0x3ffffff; + d3 += c; + c = (unsigned long) (d3 >> 26); + h3 = (unsigned long) d3 & 0x3ffffff; + d4 += c; + c = (unsigned long) (d4 >> 26); + h4 = (unsigned long) d4 & 0x3ffffff; + h0 += c * 5; + c = (h0 >> 26); + h0 = h0 & 0x3ffffff; + h1 += c; + + m += poly1305_block_size; + bytes -= poly1305_block_size; + } + + st->h[0] = h0; + st->h[1] = h1; + st->h[2] = h2; + st->h[3] = h3; + st->h[4] = h4; +} + +static POLY1305_NOINLINE void +poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16]) +{ + unsigned long h0, h1, h2, h3, h4, c; + unsigned long g0, g1, g2, g3, g4; + unsigned long long f; + unsigned long mask; + + /* process the remaining block */ + if (st->leftover) { + unsigned long long i = st->leftover; + + st->buffer[i++] = 1; + for (; i < poly1305_block_size; i++) { + st->buffer[i] = 0; + } + st->final = 1; + poly1305_blocks(st, st->buffer, poly1305_block_size); + } + + /* fully carry h */ + h0 = st->h[0]; + h1 = st->h[1]; + h2 = st->h[2]; + h3 = st->h[3]; + h4 = st->h[4]; + + c = h1 >> 26; + h1 = h1 & 0x3ffffff; + h2 += c; + c = h2 >> 26; + h2 = h2 & 0x3ffffff; + h3 += c; + c = h3 >> 26; + h3 = h3 & 0x3ffffff; + h4 += c; + c = h4 >> 26; + h4 = h4 & 0x3ffffff; + h0 += c * 5; + c = h0 >> 26; + h0 = h0 & 0x3ffffff; + h1 += c; + + /* compute h + -p */ + g0 = h0 + 5; + c = g0 >> 26; + g0 &= 0x3ffffff; + g1 = h1 + c; + c = g1 >> 26; + g1 &= 0x3ffffff; + g2 = h2 + c; + c = g2 >> 26; + g2 &= 0x3ffffff; + g3 = h3 + c; + c = g3 >> 26; + g3 &= 0x3ffffff; + g4 = h4 + c - (1UL << 26); + + /* select h if h < p, or h + -p if h >= p */ + mask = (g4 >> ((sizeof(unsigned long) * 8) - 1)) - 1; + g0 &= mask; + g1 &= mask; + g2 &= mask; + g3 &= mask; + g4 &= mask; + mask = ~mask; + + h0 = (h0 & mask) | g0; + h1 = (h1 & mask) | g1; + h2 = (h2 & mask) | g2; + h3 = (h3 & mask) | g3; + h4 = (h4 & mask) | g4; + + /* h = h % (2^128) */ + h0 = ((h0) | (h1 << 26)) & 0xffffffff; + h1 = ((h1 >> 6) | (h2 << 20)) & 0xffffffff; + h2 = ((h2 >> 12) | (h3 << 14)) & 0xffffffff; + h3 = ((h3 >> 18) | (h4 << 8)) & 0xffffffff; + + /* mac = (h + pad) % (2^128) */ + f = (unsigned long long) h0 + st->pad[0]; + h0 = (unsigned long) f; + f = (unsigned long long) h1 + st->pad[1] + (f >> 32); + h1 = (unsigned long) f; + f = (unsigned long long) h2 + st->pad[2] + (f >> 32); + h2 = (unsigned long) f; + f = (unsigned long long) h3 + st->pad[3] + (f >> 32); + h3 = (unsigned long) f; + + STORE32_LE(mac + 0, (uint32_t) h0); + STORE32_LE(mac + 4, (uint32_t) h1); + STORE32_LE(mac + 8, (uint32_t) h2); + STORE32_LE(mac + 12, (uint32_t) h3); + + /* zero out the state */ + sodium_memzero((void *) st, sizeof *st); +} |