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scalar: Remove unused secp256k1_scalar_chacha20

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Unused since a11250330b.
This commit is contained in:
Tim Ruffing
2023-07-19 11:43:08 +02:00
parent 167194bede
commit aa3edea119
6 changed files with 0 additions and 325 deletions
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95
src/scalar_8x32_impl.h
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@@ -751,101 +751,6 @@ static SECP256K1_INLINE void secp256k1_scalar_cmov(secp256k1_scalar *r, const se
r->d[7] = (r->d[7] & mask0) | (a->d[7] & mask1);
}
#define ROTL32(x,n) ((x) << (n) | (x) >> (32-(n)))
#define QUARTERROUND(a,b,c,d) \
a += b; d = ROTL32(d ^ a, 16); \
c += d; b = ROTL32(b ^ c, 12); \
a += b; d = ROTL32(d ^ a, 8); \
c += d; b = ROTL32(b ^ c, 7);
#if defined(SECP256K1_BIG_ENDIAN)
#define LE32(p) ((((p) & 0xFF) << 24) | (((p) & 0xFF00) << 8) | (((p) & 0xFF0000) >> 8) | (((p) & 0xFF000000) >> 24))
#elif defined(SECP256K1_LITTLE_ENDIAN)
#define LE32(p) (p)
#endif
static void secp256k1_scalar_chacha20(secp256k1_scalar *r1, secp256k1_scalar *r2, const unsigned char *seed, uint64_t idx) {
size_t n;
size_t over_count = 0;
uint32_t seed32[8];
uint32_t x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;
int over1, over2;
memcpy((void *) seed32, (const void *) seed, 32);
do {
x0 = 0x61707865;
x1 = 0x3320646e;
x2 = 0x79622d32;
x3 = 0x6b206574;
x4 = LE32(seed32[0]);
x5 = LE32(seed32[1]);
x6 = LE32(seed32[2]);
x7 = LE32(seed32[3]);
x8 = LE32(seed32[4]);
x9 = LE32(seed32[5]);
x10 = LE32(seed32[6]);
x11 = LE32(seed32[7]);
x12 = idx;
x13 = idx >> 32;
x14 = 0;
x15 = over_count;
n = 10;
while (n--) {
QUARTERROUND(x0, x4, x8,x12)
QUARTERROUND(x1, x5, x9,x13)
QUARTERROUND(x2, x6,x10,x14)
QUARTERROUND(x3, x7,x11,x15)
QUARTERROUND(x0, x5,x10,x15)
QUARTERROUND(x1, x6,x11,x12)
QUARTERROUND(x2, x7, x8,x13)
QUARTERROUND(x3, x4, x9,x14)
}
x0 += 0x61707865;
x1 += 0x3320646e;
x2 += 0x79622d32;
x3 += 0x6b206574;
x4 += LE32(seed32[0]);
x5 += LE32(seed32[1]);
x6 += LE32(seed32[2]);
x7 += LE32(seed32[3]);
x8 += LE32(seed32[4]);
x9 += LE32(seed32[5]);
x10 += LE32(seed32[6]);
x11 += LE32(seed32[7]);
x12 += idx;
x13 += idx >> 32;
x14 += 0;
x15 += over_count;
r1->d[7] = x0;
r1->d[6] = x1;
r1->d[5] = x2;
r1->d[4] = x3;
r1->d[3] = x4;
r1->d[2] = x5;
r1->d[1] = x6;
r1->d[0] = x7;
r2->d[7] = x8;
r2->d[6] = x9;
r2->d[5] = x10;
r2->d[4] = x11;
r2->d[3] = x12;
r2->d[2] = x13;
r2->d[1] = x14;
r2->d[0] = x15;
over1 = secp256k1_scalar_check_overflow(r1);
over2 = secp256k1_scalar_check_overflow(r2);
over_count++;
} while (over1 | over2);
}
#undef ROTL32
#undef QUARTERROUND
#undef LE32
static void secp256k1_scalar_from_signed30(secp256k1_scalar *r, const secp256k1_modinv32_signed30 *a) {
const uint32_t a0 = a->v[0], a1 = a->v[1], a2 = a->v[2], a3 = a->v[3], a4 = a->v[4],
a5 = a->v[5], a6 = a->v[6], a7 = a->v[7], a8 = a->v[8];