BIO_S_NULL(3) OpenSSL BIO_S_NULL(3)NAMEBIO_s_null - null data sink
BIO_METHOD * BIO_s_null(void);
DESCRIPTIONBIO_s_null() returns the null sink BIO method. Data written to the null
sink is discarded, reads return EOF.
A null sink BIO behaves in a similar manner to the Unix /dev/null
A null bio can be placed on the end of a chain to discard any data
passed through it.
A null sink is useful if, for example, an application wishes to digest
some data by writing through a digest bio but not send the digested
data anywhere. Since a BIO chain must normally include a source/sink
BIO this can be achieved by adding a null sink BIO to the end of the
RETURN VALUESBIO_s_null() returns the null sink BIO method.
OpenBSD 4.9 December 14, 2000