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- Found algorithmic bug in mpi_is_prime()

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This commit is contained in:
Paul Bakker
2010-03-16 21:26:36 +00:00
parent 4ed999c4b2
commit 41d13f4af8
2 changed files with 3 additions and 1 deletions
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2
library/bignum.c
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@@ -1720,8 +1720,8 @@ int mpi_is_prime( mpi *X, int (*f_rng)(void *), void *p_rng )
* W = |X| - 1
* R = W >> lsb( W )
*/
s = mpi_lsb( &W );
MPI_CHK( mpi_sub_int( &W, X, 1 ) );
s = mpi_lsb( &W );
MPI_CHK( mpi_copy( &R, &W ) );
MPI_CHK( mpi_shift_r( &R, s ) );