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Change ecp_mul() prototype to allow randomization

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(Also improve an error code while at it.)
This commit is contained in:
Manuel Pégourié-Gonnard
2013-09-02 14:29:09 +02:00
parent f451bac000
commit e09d2f8261
10 changed files with 99 additions and 37 deletions
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7
library/ecdsa.c
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@ -161,9 +161,12 @@ int ecdsa_verify( const ecp_group *grp,
/*
* Step 5: R = u1 G + u2 Q
*
* Since we're not using any secret data, no need to pass a RNG to
* ecp_mul() for countermesures.
*/
MPI_CHK( ecp_mul( grp, &R, &u1, &grp->G ) );
MPI_CHK( ecp_mul( grp, &P, &u2, Q ) );
MPI_CHK( ecp_mul( grp, &R, &u1, &grp->G, NULL, NULL ) );
MPI_CHK( ecp_mul( grp, &P, &u2, Q, NULL, NULL ) );
MPI_CHK( ecp_add( grp, &R, &R, &P ) );
if( ecp_is_zero( &R ) )