4534056c28
* MP_USE_ENUMS enables enums * Wc++-compat catches some implicit conversions if MP_USE_ENUMS is defined * 100% backwards compatible API/ABI if MP_USE_ENUMS is not defined
34 lines
761 B
C
34 lines
761 B
C
#include "tommath_private.h"
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#ifdef BN_MP_TO_UNSIGNED_BIN_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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/* store in unsigned [big endian] format */
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mp_err mp_to_unsigned_bin(const mp_int *a, unsigned char *b)
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{
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int x;
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mp_err res;
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mp_int t;
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if ((res = mp_init_copy(&t, a)) != MP_OKAY) {
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return res;
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}
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x = 0;
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while (!MP_IS_ZERO(&t)) {
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#ifndef MP_8BIT
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b[x++] = (unsigned char)(t.dp[0] & 255u);
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#else
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b[x++] = (unsigned char)(t.dp[0] | ((t.dp[1] & 1u) << 7));
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#endif
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if ((res = mp_div_2d(&t, 8, &t, NULL)) != MP_OKAY) {
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mp_clear(&t);
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return res;
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}
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}
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s_mp_reverse(b, x);
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mp_clear(&t);
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return MP_OKAY;
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}
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#endif
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