Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 435 insertions, 0 deletions

diff --git a/grub-core/lib/libgcrypt-grub/mpi/mpiutil.c b/grub-core/lib/libgcrypt-grub/mpi/mpiutil.c
new file mode 100644
index 0000000..3fec8db
--- /dev/null
+++ b/grub-core/lib/libgcrypt-grub/mpi/mpiutil.c
@@ -0,0 +1,435 @@
+/* This file was automatically imported with 
+   import_gcry.py. Please don't modify it */
+/* mpiutil.ac  -  Utility functions for MPI
+ * Copyright (C) 1998, 2000, 2001, 2002, 2003,
+ *               2007  Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "g10lib.h"
+#include "mpi-internal.h"
+
+
+
+
+/****************
+ * Note:  It was a bad idea to use the number of limbs to allocate
+ *	  because on a alpha the limbs are large but we normally need
+ *	  integers of n bits - So we should change this to bits (or bytes).
+ *
+ *	  But mpi_alloc is used in a lot of places :-(.  New code
+ *	  should use mpi_new.
+ */
+gcry_mpi_t
+_gcry_mpi_alloc( unsigned nlimbs )
+{
+    gcry_mpi_t a;
+
+    a = gcry_xmalloc( sizeof *a );
+    a->d = nlimbs? mpi_alloc_limb_space( nlimbs, 0 ) : NULL;
+    a->alloced = nlimbs;
+    a->nlimbs = 0;
+    a->sign = 0;
+    a->flags = 0;
+    return a;
+}
+
+void
+_gcry_mpi_m_check( gcry_mpi_t a )
+{
+    _gcry_check_heap(a);
+    _gcry_check_heap(a->d);
+}
+
+gcry_mpi_t
+_gcry_mpi_alloc_secure( unsigned nlimbs )
+{
+    gcry_mpi_t a;
+
+    a = gcry_xmalloc( sizeof *a );
+    a->d = nlimbs? mpi_alloc_limb_space( nlimbs, 1 ) : NULL;
+    a->alloced = nlimbs;
+    a->flags = 1;
+    a->nlimbs = 0;
+    a->sign = 0;
+    return a;
+}
+
+
+
+mpi_ptr_t
+_gcry_mpi_alloc_limb_space( unsigned int nlimbs, int secure )
+{
+    mpi_ptr_t p;
+    size_t len;
+
+    len = (nlimbs ? nlimbs : 1) * sizeof (mpi_limb_t);
+    p = secure ? gcry_xmalloc_secure (len) : gcry_xmalloc (len);
+    if (! nlimbs)
+      *p = 0;
+
+    return p;
+}
+
+void
+_gcry_mpi_free_limb_space( mpi_ptr_t a, unsigned int nlimbs)
+{
+  if (a)
+    {
+      size_t len = nlimbs * sizeof(mpi_limb_t);
+
+      /* If we have information on the number of allocated limbs, we
+         better wipe that space out.  This is a failsafe feature if
+         secure memory has been disabled or was not properly
+         implemented in user provided allocation functions. */
+      if (len)
+        wipememory (a, len);
+      gcry_free(a);
+    }
+}
+
+
+void
+_gcry_mpi_assign_limb_space( gcry_mpi_t a, mpi_ptr_t ap, unsigned int nlimbs )
+{
+  _gcry_mpi_free_limb_space (a->d, a->alloced);
+  a->d = ap;
+  a->alloced = nlimbs;
+}
+
+
+
+/****************
+ * Resize the array of A to NLIMBS. The additional space is cleared
+ * (set to 0).
+ */
+void
+_gcry_mpi_resize (gcry_mpi_t a, unsigned nlimbs)
+{
+  size_t i;
+
+  if (nlimbs <= a->alloced)
+    {
+      /* We only need to clear the new space (this is a nop if the
+         limb space is already of the correct size. */
+      for (i=a->nlimbs; i < a->alloced; i++)
+        a->d[i] = 0;
+      return;
+    }
+
+  /* Actually resize the limb space.  */
+  if (a->d)
+    {
+      a->d = gcry_xrealloc (a->d, nlimbs * sizeof (mpi_limb_t));
+      for (i=a->alloced; i < nlimbs; i++)
+        a->d[i] = 0;
+    }
+  else
+    {
+      if (a->flags & 1)
+	/* Secure memory is wanted.  */
+	a->d = gcry_xcalloc_secure (nlimbs , sizeof (mpi_limb_t));
+      else
+	/* Standard memory.  */
+	a->d = gcry_xcalloc (nlimbs , sizeof (mpi_limb_t));
+    }
+  a->alloced = nlimbs;
+}
+
+void
+_gcry_mpi_clear( gcry_mpi_t a )
+{
+    a->nlimbs = 0;
+    a->flags = 0;
+}
+
+
+void
+_gcry_mpi_free( gcry_mpi_t a )
+{
+  if (!a )
+    return;
+  if ((a->flags & 4))
+    gcry_free( a->d );
+  else
+    {
+      _gcry_mpi_free_limb_space(a->d, a->alloced);
+    }
+  if ((a->flags & ~7))
+    log_bug("invalid flag value in mpi\n");
+  gcry_free(a);
+}
+
+static void
+mpi_set_secure( gcry_mpi_t a )
+{
+  mpi_ptr_t ap, bp;
+
+  if ( (a->flags & 1) )
+    return;
+  a->flags |= 1;
+  ap = a->d;
+  if (!a->nlimbs)
+    {
+      gcry_assert (!ap);
+      return;
+    }
+  bp = mpi_alloc_limb_space (a->nlimbs, 1);
+  MPN_COPY( bp, ap, a->nlimbs );
+  a->d = bp;
+  _gcry_mpi_free_limb_space (ap, a->alloced);
+}
+
+
+gcry_mpi_t
+gcry_mpi_set_opaque( gcry_mpi_t a, void *p, unsigned int nbits )
+{
+  if (!a)
+    a = mpi_alloc(0);
+
+  if( a->flags & 4 )
+    gcry_free( a->d );
+  else
+    _gcry_mpi_free_limb_space (a->d, a->alloced);
+
+  a->d = p;
+  a->alloced = 0;
+  a->nlimbs = 0;
+  a->sign  = nbits;
+  a->flags = 4;
+  return a;
+}
+
+
+void *
+gcry_mpi_get_opaque( gcry_mpi_t a, unsigned int *nbits )
+{
+    if( !(a->flags & 4) )
+	log_bug("mpi_get_opaque on normal mpi\n");
+    if( nbits )
+	*nbits = a->sign;
+    return a->d;
+}
+
+
+/****************
+ * Note: This copy function should not interpret the MPI
+ *	 but copy it transparently.
+ */
+gcry_mpi_t
+gcry_mpi_copy( gcry_mpi_t a )
+{
+    int i;
+    gcry_mpi_t b;
+
+    if( a && (a->flags & 4) ) {
+	void *p = gcry_is_secure(a->d)? gcry_xmalloc_secure( (a->sign+7)/8 )
+				     : gcry_xmalloc( (a->sign+7)/8 );
+	memcpy( p, a->d, (a->sign+7)/8 );
+	b = gcry_mpi_set_opaque( NULL, p, a->sign );
+    }
+    else if( a ) {
+	b = mpi_is_secure(a)? mpi_alloc_secure( a->nlimbs )
+			    : mpi_alloc( a->nlimbs );
+	b->nlimbs = a->nlimbs;
+	b->sign = a->sign;
+	b->flags  = a->flags;
+	for(i=0; i < b->nlimbs; i++ )
+	    b->d[i] = a->d[i];
+    }
+    else
+	b = NULL;
+    return b;
+}
+
+
+/****************
+ * This function allocates an MPI which is optimized to hold
+ * a value as large as the one given in the argument and allocates it
+ * with the same flags as A.
+ */
+gcry_mpi_t
+_gcry_mpi_alloc_like( gcry_mpi_t a )
+{
+    gcry_mpi_t b;
+
+    if( a && (a->flags & 4) ) {
+	int n = (a->sign+7)/8;
+	void *p = gcry_is_secure(a->d)? gcry_malloc_secure( n )
+				     : gcry_malloc( n );
+	memcpy( p, a->d, n );
+	b = gcry_mpi_set_opaque( NULL, p, a->sign );
+    }
+    else if( a ) {
+	b = mpi_is_secure(a)? mpi_alloc_secure( a->nlimbs )
+			    : mpi_alloc( a->nlimbs );
+	b->nlimbs = 0;
+	b->sign = 0;
+	b->flags = a->flags;
+    }
+    else
+	b = NULL;
+    return b;
+}
+
+
+gcry_mpi_t
+gcry_mpi_set( gcry_mpi_t w, gcry_mpi_t u)
+{
+  mpi_ptr_t wp, up;
+  mpi_size_t usize = u->nlimbs;
+  int usign = u->sign;
+
+  if (!w)
+    w = _gcry_mpi_alloc( mpi_get_nlimbs(u) );
+  RESIZE_IF_NEEDED(w, usize);
+  wp = w->d;
+  up = u->d;
+  MPN_COPY( wp, up, usize );
+  w->nlimbs = usize;
+  w->flags = u->flags;
+  w->sign = usign;
+  return w;
+}
+
+
+gcry_mpi_t
+gcry_mpi_set_ui( gcry_mpi_t w, unsigned long u)
+{
+  if (!w)
+    w = _gcry_mpi_alloc (1);
+  /* FIXME: If U is 0 we have no need to resize and thus possible
+     allocating the the limbs. */
+  RESIZE_IF_NEEDED(w, 1);
+  w->d[0] = u;
+  w->nlimbs = u? 1:0;
+  w->sign = 0;
+  w->flags = 0;
+  return w;
+}
+
+gcry_err_code_t
+_gcry_mpi_get_ui (gcry_mpi_t w, unsigned long *u)
+{
+  gcry_err_code_t err = GPG_ERR_NO_ERROR;
+  unsigned long x = 0;
+
+  if (w->nlimbs > 1)
+    err = GPG_ERR_TOO_LARGE;
+  else if (w->nlimbs == 1)
+    x = w->d[0];
+  else
+    x = 0;
+
+  if (! err)
+    *u = x;
+
+  return err;
+}
+
+gcry_error_t
+gcry_mpi_get_ui (gcry_mpi_t w, unsigned long *u)
+{
+  gcry_err_code_t err = GPG_ERR_NO_ERROR;
+
+  err = _gcry_mpi_get_ui (w, u);
+
+  return gcry_error (err);
+}
+
+gcry_mpi_t
+_gcry_mpi_alloc_set_ui( unsigned long u)
+{
+    gcry_mpi_t w = mpi_alloc(1);
+    w->d[0] = u;
+    w->nlimbs = u? 1:0;
+    w->sign = 0;
+    return w;
+}
+
+void
+gcry_mpi_swap( gcry_mpi_t a, gcry_mpi_t b)
+{
+    struct gcry_mpi tmp;
+
+    tmp = *a; *a = *b; *b = tmp;
+}
+
+
+gcry_mpi_t
+gcry_mpi_new( unsigned int nbits )
+{
+    return _gcry_mpi_alloc ( (nbits+BITS_PER_MPI_LIMB-1)
+                             / BITS_PER_MPI_LIMB );
+}
+
+
+gcry_mpi_t
+gcry_mpi_snew( unsigned int nbits )
+{
+  return _gcry_mpi_alloc_secure ( (nbits+BITS_PER_MPI_LIMB-1)
+                                  / BITS_PER_MPI_LIMB );
+}
+
+void
+gcry_mpi_release( gcry_mpi_t a )
+{
+    _gcry_mpi_free( a );
+}
+
+
+
+void
+gcry_mpi_set_flag( gcry_mpi_t a, enum gcry_mpi_flag flag )
+{
+    switch( flag ) {
+      case GCRYMPI_FLAG_SECURE:  mpi_set_secure(a); break;
+      case GCRYMPI_FLAG_OPAQUE:
+      default: log_bug("invalid flag value\n");
+    }
+}
+
+void
+gcry_mpi_clear_flag( gcry_mpi_t a, enum gcry_mpi_flag flag )
+{
+  (void)a; /* Not yet used. */
+
+  switch (flag)
+    {
+    case GCRYMPI_FLAG_SECURE:
+    case GCRYMPI_FLAG_OPAQUE:
+    default: log_bug("invalid flag value\n");
+    }
+}
+
+int
+gcry_mpi_get_flag( gcry_mpi_t a, enum gcry_mpi_flag flag )
+{
+  switch (flag)
+    {
+    case GCRYMPI_FLAG_SECURE: return (a->flags & 1);
+    case GCRYMPI_FLAG_OPAQUE: return (a->flags & 4);
+    default: log_bug("invalid flag value\n");
+    }
+  /*NOTREACHED*/
+  return 0;
+}