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g10: fix cmp_public_key and cmp_secret_keys.

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* g10/free-packet.c (cmp_public_keys, cmp_secret_keys): Compare opaque
data at the first entry of the array when it's unknown algo.
* mpi/mpi-cmp.c (mpi_cmp): Backport libgcrypt 1.5.0's semantics.

--

(backported from 2.0 commit 43429c7869)

GnuPG-bug-id: 1962
This commit is contained in:
NIIBE Yutaka 2015-04-30 17:20:08 +09:00
parent 506eb6fec6
commit 04667cabef
2 changed files with 30 additions and 8 deletions
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22
g10/free-packet.c
View File

@ -452,11 +452,14 @@ cmp_public_keys( PKT_public_key *a, PKT_public_key *b )
return -1;
n = pubkey_get_npkey( b->pubkey_algo );
if( !n )
return -1; /* can't compare due to unknown algorithm */
for(i=0; i < n; i++ ) {
if( mpi_cmp( a->pkey[i], b->pkey[i] ) )
if( !n ) { /* unknown algorithm, rest is in opaque MPI */
if( mpi_cmp( a->pkey[0], b->pkey[0] ) )
return -1;
} else {
for(i=0; i < n; i++ ) {
if( mpi_cmp( a->pkey[i], b->pkey[i] ) )
return -1;
}
}
return 0;
@ -479,11 +482,14 @@ cmp_secret_keys( PKT_secret_key *a, PKT_secret_key *b )
return -1;
n = pubkey_get_npkey( b->pubkey_algo );
if( !n )
return -1; /* can't compare due to unknown algorithm */
for(i=0; i < n; i++ ) {
if( mpi_cmp( a->skey[i], b->skey[i] ) )
if( !n ) { /* unknown algorithm, rest is in opaque MPI */
if( mpi_cmp( a->skey[0], b->skey[0] ) )
return -1;
} else {
for(i=0; i < n; i++ ) {
if( mpi_cmp( a->skey[i], b->skey[i] ) )
return -1;
}
}
return 0;

16
mpi/mpi-cmp.c
View File

@ -20,6 +20,7 @@
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mpi-internal.h"
int
@ -49,6 +50,21 @@ mpi_cmp( MPI u, MPI v )
mpi_size_t usize, vsize;
int cmp;
if (mpi_is_opaque (u) || mpi_is_opaque (v))
{
if (mpi_is_opaque (u) && !mpi_is_opaque (v))
return -1;
if (!mpi_is_opaque (u) && mpi_is_opaque (v))
return 1;
if (!u->nbits && !v->nbits)
return 0; /* Empty buffers are identical. */
if (u->nbits < v->nbits)
return -1;
if (u->nbits > v->nbits)
return 1;
return memcmp (u->d, v->d, u->nbits);
}
mpi_normalize( u );
mpi_normalize( v );
usize = u->nlimbs;