diff options
| author | Matt Johnston <matt@ucc.asn.au> | 2018-02-08 23:11:40 +0800 |
|---|---|---|
| committer | Matt Johnston <matt@ucc.asn.au> | 2018-02-08 23:11:40 +0800 |
| commit | d72f50ff3284e15124a0f233c26339229fe305ac (patch) | |
| tree | 350fc0fb147ca0730219e0fec6573eff58fa4a65 /libtommath/bn_mp_exteuclid.c | |
| parent | debb20855380bad6547b8a3eee59da518bc6eed2 (diff) | |
Update to libtommath v1.0.1
Diffstat (limited to 'libtommath/bn_mp_exteuclid.c')
| -rw-r--r-- | libtommath/bn_mp_exteuclid.c | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/libtommath/bn_mp_exteuclid.c b/libtommath/bn_mp_exteuclid.c index fbbd92c..3c9612e 100644 --- a/libtommath/bn_mp_exteuclid.c +++ b/libtommath/bn_mp_exteuclid.c @@ -29,41 +29,41 @@ int mp_exteuclid(mp_int *a, mp_int *b, mp_int *U1, mp_int *U2, mp_int *U3) /* initialize, (u1,u2,u3) = (1,0,a) */ mp_set(&u1, 1); - if ((err = mp_copy(a, &u3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_copy(a, &u3)) != MP_OKAY) { goto LBL_ERR; } /* initialize, (v1,v2,v3) = (0,1,b) */ mp_set(&v2, 1); - if ((err = mp_copy(b, &v3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_copy(b, &v3)) != MP_OKAY) { goto LBL_ERR; } /* loop while v3 != 0 */ while (mp_iszero(&v3) == MP_NO) { /* q = u3/v3 */ - if ((err = mp_div(&u3, &v3, &q, NULL)) != MP_OKAY) { goto _ERR; } + if ((err = mp_div(&u3, &v3, &q, NULL)) != MP_OKAY) { goto LBL_ERR; } /* (t1,t2,t3) = (u1,u2,u3) - (v1,v2,v3)q */ - if ((err = mp_mul(&v1, &q, &tmp)) != MP_OKAY) { goto _ERR; } - if ((err = mp_sub(&u1, &tmp, &t1)) != MP_OKAY) { goto _ERR; } - if ((err = mp_mul(&v2, &q, &tmp)) != MP_OKAY) { goto _ERR; } - if ((err = mp_sub(&u2, &tmp, &t2)) != MP_OKAY) { goto _ERR; } - if ((err = mp_mul(&v3, &q, &tmp)) != MP_OKAY) { goto _ERR; } - if ((err = mp_sub(&u3, &tmp, &t3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_mul(&v1, &q, &tmp)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_sub(&u1, &tmp, &t1)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_mul(&v2, &q, &tmp)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_sub(&u2, &tmp, &t2)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_mul(&v3, &q, &tmp)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_sub(&u3, &tmp, &t3)) != MP_OKAY) { goto LBL_ERR; } /* (u1,u2,u3) = (v1,v2,v3) */ - if ((err = mp_copy(&v1, &u1)) != MP_OKAY) { goto _ERR; } - if ((err = mp_copy(&v2, &u2)) != MP_OKAY) { goto _ERR; } - if ((err = mp_copy(&v3, &u3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_copy(&v1, &u1)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_copy(&v2, &u2)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_copy(&v3, &u3)) != MP_OKAY) { goto LBL_ERR; } /* (v1,v2,v3) = (t1,t2,t3) */ - if ((err = mp_copy(&t1, &v1)) != MP_OKAY) { goto _ERR; } - if ((err = mp_copy(&t2, &v2)) != MP_OKAY) { goto _ERR; } - if ((err = mp_copy(&t3, &v3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_copy(&t1, &v1)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_copy(&t2, &v2)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_copy(&t3, &v3)) != MP_OKAY) { goto LBL_ERR; } } /* make sure U3 >= 0 */ if (u3.sign == MP_NEG) { - if ((err = mp_neg(&u1, &u1)) != MP_OKAY) { goto _ERR; } - if ((err = mp_neg(&u2, &u2)) != MP_OKAY) { goto _ERR; } - if ((err = mp_neg(&u3, &u3)) != MP_OKAY) { goto _ERR; } + if ((err = mp_neg(&u1, &u1)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_neg(&u2, &u2)) != MP_OKAY) { goto LBL_ERR; } + if ((err = mp_neg(&u3, &u3)) != MP_OKAY) { goto LBL_ERR; } } /* copy result out */ @@ -72,11 +72,12 @@ int mp_exteuclid(mp_int *a, mp_int *b, mp_int *U1, mp_int *U2, mp_int *U3) if (U3 != NULL) { mp_exch(U3, &u3); } err = MP_OKAY; -_ERR: mp_clear_multi(&u1, &u2, &u3, &v1, &v2, &v3, &t1, &t2, &t3, &q, &tmp, NULL); +LBL_ERR: + mp_clear_multi(&u1, &u2, &u3, &v1, &v2, &v3, &t1, &t2, &t3, &q, &tmp, NULL); return err; } #endif -/* $Source$ */ -/* $Revision$ */ -/* $Date$ */ +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |