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This commit is contained in:
Werner Koch 2004-03-29 13:56:57 +00:00
parent fcbd25c5ad
commit 42ac422ba0
9 changed files with 99 additions and 34 deletions
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6
cipher/ChangeLog
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@ -1,3 +1,9 @@
2004-03-29 Werner Koch <wk@gnupg.org>
* elgamal.c (verify): s/exp/exponent/ to shutup a compiler
warning.
* dsa.c (verify): Ditto.
2003-11-29 David Shaw <dshaw@jabberwocky.com>
* elgamal.c (gen_k): New arg SMALL_K.

10
cipher/dsa.c
View file

@ -320,7 +320,7 @@ verify(MPI r, MPI s, MPI hash, DSA_public_key *pkey )
int rc;
MPI w, u1, u2, v;
MPI base[3];
MPI exp[3];
MPI exponent[3];
if( !(mpi_cmp_ui( r, 0 ) > 0 && mpi_cmp( r, pkey->q ) < 0) )
@ -343,10 +343,10 @@ verify(MPI r, MPI s, MPI hash, DSA_public_key *pkey )
mpi_mulm( u2, r, w, pkey->q );
/* v = g^u1 * y^u2 mod p mod q */
base[0] = pkey->g; exp[0] = u1;
base[1] = pkey->y; exp[1] = u2;
base[2] = NULL; exp[2] = NULL;
mpi_mulpowm( v, base, exp, pkey->p );
base[0] = pkey->g; exponent[0] = u1;
base[1] = pkey->y; exponent[1] = u2;
base[2] = NULL; exponent[2] = NULL;
mpi_mulpowm( v, base, exponent, pkey->p );
mpi_fdiv_r( v, v, pkey->q );
rc = !mpi_cmp( v, r );

20
cipher/elgamal.c
View file

@ -458,7 +458,7 @@ verify(MPI a, MPI b, MPI input, ELG_public_key *pkey )
MPI t1;
MPI t2;
MPI base[4];
MPI exp[4];
MPI exponent[4];
if( !(mpi_cmp_ui( a, 0 ) > 0 && mpi_cmp( a, pkey->p ) < 0) )
return 0; /* assertion 0 < a < p failed */
@ -478,10 +478,10 @@ verify(MPI a, MPI b, MPI input, ELG_public_key *pkey )
rc = !mpi_cmp( t1, t2 );
#elif 0
/* t1 = (y^a mod p) * (a^b mod p) mod p */
base[0] = pkey->y; exp[0] = a;
base[1] = a; exp[1] = b;
base[2] = NULL; exp[2] = NULL;
mpi_mulpowm( t1, base, exp, pkey->p );
base[0] = pkey->y; exponent[0] = a;
base[1] = a; exponent[1] = b;
base[2] = NULL; exponent[2] = NULL;
mpi_mulpowm( t1, base, exponent, pkey->p );
/* t2 = g ^ input mod p */
mpi_powm( t2, pkey->g, input, pkey->p );
@ -490,11 +490,11 @@ verify(MPI a, MPI b, MPI input, ELG_public_key *pkey )
#else
/* t1 = g ^ - input * y ^ a * a ^ b mod p */
mpi_invm(t2, pkey->g, pkey->p );
base[0] = t2 ; exp[0] = input;
base[1] = pkey->y; exp[1] = a;
base[2] = a; exp[2] = b;
base[3] = NULL; exp[3] = NULL;
mpi_mulpowm( t1, base, exp, pkey->p );
base[0] = t2 ; exponent[0] = input;
base[1] = pkey->y; exponent[1] = a;
base[2] = a; exponent[2] = b;
base[3] = NULL; exponent[3] = NULL;
mpi_mulpowm( t1, base, exponent, pkey->p );
rc = !mpi_cmp_ui( t1, 1 );
#endif