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Merged support for secp224k1, secp192k1 and secp25k1

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Paul Bakker
2014-01-22 13:08:44 +01:00
parent 3eb9673e19 9af7d3a35b
commit 0ac99ca7bc
10 changed files with 319 additions and 8 deletions
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10
library/ecdsa.c
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@ -43,8 +43,16 @@
static int derive_mpi( const ecp_group *grp, mpi *x,
const unsigned char *buf, size_t blen )
{
int ret;
size_t n_size = (grp->nbits + 7) / 8;
return( mpi_read_binary( x, buf, blen > n_size ? n_size : blen ) );
size_t use_size = blen > n_size ? n_size : blen;
MPI_CHK( mpi_read_binary( x, buf, use_size ) );
if( use_size * 8 > grp->nbits )
MPI_CHK( mpi_shift_r( x, use_size * 8 - grp->nbits ) );
cleanup:
return( ret );
}
/*