1 files changed, 431 insertions, 0 deletions

diff --git a/pwmanager/libcrypt/mpi/mpiutil.c b/pwmanager/libcrypt/mpi/mpiutil.c
new file mode 100644
index 0000000..2a0bafa
--- a/dev/null
+++ b/pwmanager/libcrypt/mpi/mpiutil.c
@@ -0,0 +1,431 @@
+/* mpiutil.ac  -  Utility functions for MPI
+ * Copyright (C) 1998, 2000, 2001, 2002, 2003 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "g10lib.h"
+#include "mpi-internal.h"
+#include "memory.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 chnage this to bits (or bytes).
+ *
+         *  But mpi_alloc is used in a lot of places :-)
+ */
+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 )
+{
+    size_t len = nlimbs * sizeof(mpi_limb_t);
+    mpi_ptr_t p = NULL;
+
+    if (!nlimbs)
+      {
+        p = secure? gcry_xmalloc_secure( 1 ) : gcry_xmalloc( 1 );
+        *p = 0;
+      }
+    else
+      p = secure? gcry_xmalloc_secure( len ) : gcry_xmalloc( len );
+
+    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) [done by gcry_realloc()]
+ */
+void
+_gcry_mpi_resize (gcry_mpi_t a, unsigned nlimbs)
+{
+  if (nlimbs <= a->alloced)
+    return; /* no need to do it */
+
+  if (a->d)
+    a->d = gcry_xrealloc (a->d, nlimbs * sizeof (mpi_limb_t));
+  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)
+    {
+      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;
+}
+
+
+void
+_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;
+
+    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;
+}
+
+
+void
+_gcry_mpi_set_ui( gcry_mpi_t w, unsigned long u)
+{
+    RESIZE_IF_NEEDED(w, 1);
+    w->d[0] = u;
+    w->nlimbs = u? 1:0;
+    w->sign = 0;
+    w->flags = 0;
+}
+
+
+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;
+}
+
+void
+gcry_mpi_swap( gcry_mpi_t a, gcry_mpi_t b)
+{
+  _gcry_mpi_swap (a, b);
+}
+
+
+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 );
+}
+
+gcry_mpi_t
+gcry_mpi_copy( const gcry_mpi_t a )
+{
+    return _gcry_mpi_copy( (gcry_mpi_t)a );
+}
+
+gcry_mpi_t
+gcry_mpi_set( gcry_mpi_t w, const gcry_mpi_t u )
+{
+    if( !w )
+        w = _gcry_mpi_alloc( mpi_get_nlimbs(u) );
+    _gcry_mpi_set( w, (gcry_mpi_t)u );
+    return w;
+}
+
+gcry_mpi_t
+gcry_mpi_set_ui( gcry_mpi_t w, unsigned long u )
+{
+    if( !w )
+        w = _gcry_mpi_alloc(1);
+    _gcry_mpi_set_ui( w, u );
+    return w;
+}
+
+
+void
+gcry_mpi_randomize( gcry_mpi_t w,
+                    unsigned int nbits, enum gcry_random_level level )
+{
+  char *p;
+  size_t nbytes = (nbits+7)/8;
+  
+  if (level == GCRY_WEAK_RANDOM)
+    {
+      p = mpi_is_secure(w) ? gcry_xmalloc (nbytes)
+                           : gcry_xmalloc_secure (nbytes);
+      gcry_create_nonce (p, nbytes);
+    }
+  else
+    {
+      p = mpi_is_secure(w) ? gcry_random_bytes (nbytes, level)
+                           : gcry_random_bytes_secure (nbytes, level);
+    }
+  _gcry_mpi_set_buffer( w, p, nbytes, 0 );
+  gcry_free (p);
+}
+
+
+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 )
+{
+    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");
+    }
+}
+