From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- .../heimdal/lib/hcrypto/libtommath/bn_mp_copy.c | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 third_party/heimdal/lib/hcrypto/libtommath/bn_mp_copy.c (limited to 'third_party/heimdal/lib/hcrypto/libtommath/bn_mp_copy.c') diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_copy.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_copy.c new file mode 100644 index 0000000..e72fcf6 --- /dev/null +++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_copy.c @@ -0,0 +1,47 @@ +#include "tommath_private.h" +#ifdef BN_MP_COPY_C +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ + +/* copy, b = a */ +mp_err mp_copy(const mp_int *a, mp_int *b) +{ + int n; + mp_digit *tmpa, *tmpb; + mp_err err; + + /* if dst == src do nothing */ + if (a == b) { + return MP_OKAY; + } + + /* grow dest */ + if (b->alloc < a->used) { + if ((err = mp_grow(b, a->used)) != MP_OKAY) { + return err; + } + } + + /* zero b and copy the parameters over */ + /* pointer aliases */ + + /* source */ + tmpa = a->dp; + + /* destination */ + tmpb = b->dp; + + /* copy all the digits */ + for (n = 0; n < a->used; n++) { + *tmpb++ = *tmpa++; + } + + /* clear high digits */ + MP_ZERO_DIGITS(tmpb, b->used - n); + + /* copy used count and sign */ + b->used = a->used; + b->sign = a->sign; + return MP_OKAY; +} +#endif -- cgit v1.2.3