diff options
Diffstat (limited to 'cipher/elgamal.c')
| -rw-r--r-- | cipher/elgamal.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/cipher/elgamal.c b/cipher/elgamal.c index 13b8579fe..6defbc5f8 100644 --- a/cipher/elgamal.c +++ b/cipher/elgamal.c @@ -322,6 +322,16 @@ elg_verify(MPI a, MPI b, MPI input, ELG_public_key *pkey ) #if 0 /* t1 = (y^a mod p) * (a^b mod p) mod p */ + mpi_powm( t1, pkey->y, a, pkey->p ); + mpi_powm( t2, a, b, pkey->p ); + mpi_mulm( t1, t1, t2, pkey->p ); + + /* t2 = g ^ input mod p */ + mpi_powm( t2, pkey->g, input, pkey->p ); + + 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; |