change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/lib/mpi/mpih-mul.c
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@@ -1,22 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* mpihelp-mul.c  -  MPI helper functions
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  * Copyright (C) 1994, 1996, 1998, 1999,
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  *               2000 Free Software Foundation, Inc.
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  *
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  * This file is part of GnuPG.
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- *
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- * GnuPG is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * GnuPG is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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  *
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  * Note: This code is heavily based on the GNU MP Library.
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  *	 Actually it's the same code with only minor changes in the
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@@ -330,6 +317,31 @@
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 	}
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 }
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+
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+void mpihelp_mul_n(mpi_ptr_t prodp,
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+		mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size)
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+{
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+	if (up == vp) {
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+		if (size < KARATSUBA_THRESHOLD)
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+			mpih_sqr_n_basecase(prodp, up, size);
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+		else {
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+			mpi_ptr_t tspace;
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+			tspace = mpi_alloc_limb_space(2 * size);
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+			mpih_sqr_n(prodp, up, size, tspace);
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+			mpi_free_limb_space(tspace);
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+		}
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+	} else {
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+		if (size < KARATSUBA_THRESHOLD)
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+			mul_n_basecase(prodp, up, vp, size);
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+		else {
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+			mpi_ptr_t tspace;
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+			tspace = mpi_alloc_limb_space(2 * size);
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+			mul_n(prodp, up, vp, size, tspace);
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+			mpi_free_limb_space(tspace);
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+		}
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+	}
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+}
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+
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 int
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 mpihelp_mul_karatsuba_case(mpi_ptr_t prodp,
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 			   mpi_ptr_t up, mpi_size_t usize,