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Diffstat (limited to 'libtommath/bn_mp_import.c')
-rw-r--r-- | libtommath/bn_mp_import.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/libtommath/bn_mp_import.c b/libtommath/bn_mp_import.c deleted file mode 100644 index fb74611..0000000 --- a/libtommath/bn_mp_import.c +++ /dev/null @@ -1,68 +0,0 @@ -#include "tommath_private.h" -#ifdef BN_MP_IMPORT_C -/* LibTomMath, multiple-precision integer library -- Tom St Denis - * - * LibTomMath is a library that provides multiple-precision - * integer arithmetic as well as number theoretic functionality. - * - * The library was designed directly after the MPI library by - * Michael Fromberger but has been written from scratch with - * additional optimizations in place. - * - * SPDX-License-Identifier: Unlicense - */ - -/* based on gmp's mpz_import. - * see http://gmplib.org/manual/Integer-Import-and-Export.html - */ -int mp_import(mp_int *rop, size_t count, int order, size_t size, - int endian, size_t nails, const void *op) -{ - int result; - size_t odd_nails, nail_bytes, i, j; - unsigned char odd_nail_mask; - - mp_zero(rop); - - if (endian == 0) { - union { - unsigned int i; - char c[4]; - } lint; - lint.i = 0x01020304; - - endian = (lint.c[0] == '\x04') ? -1 : 1; - } - - odd_nails = (nails % 8u); - odd_nail_mask = 0xff; - for (i = 0; i < odd_nails; ++i) { - odd_nail_mask ^= (unsigned char)(1u << (7u - i)); - } - nail_bytes = nails / 8u; - - for (i = 0; i < count; ++i) { - for (j = 0; j < (size - nail_bytes); ++j) { - unsigned char byte = *((unsigned char *)op + - (((order == 1) ? i : ((count - 1u) - i)) * size) + - ((endian == 1) ? (j + nail_bytes) : (((size - 1u) - j) - nail_bytes))); - - if ((result = mp_mul_2d(rop, (j == 0u) ? (int)(8u - odd_nails) : 8, rop)) != MP_OKAY) { - return result; - } - - rop->dp[0] |= (j == 0u) ? (mp_digit)(byte & odd_nail_mask) : (mp_digit)byte; - rop->used += 1; - } - } - - mp_clamp(rop); - - return MP_OKAY; -} - -#endif - -/* ref: HEAD -> master, tag: v1.1.0 */ -/* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ -/* commit time: 2019-01-28 20:32:32 +0100 */ |