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DSA_METH_NEW(3)       DragonFly Library Functions Manual       DSA_METH_NEW(3)


NAME

     DSA_meth_new, DSA_meth_free, DSA_meth_dup, DSA_meth_set_sign,
     DSA_meth_set_finish -- build up DSA methods


SYNOPSIS

     #include <openssl/dsa.h>

     DSA_METHOD *
     DSA_meth_new(const char *name, int flags);

     void
     DSA_meth_free(DSA_METHOD *meth);

     DSA_METHOD *
     DSA_meth_dup(const DSA_METHOD *meth);

     int
     DSA_meth_set_sign(DSA_METHOD *meth,
	 DSA_SIG *(*sign)(const unsigned char *, int, DSA *));

     int
     DSA_meth_set_finish(DSA_METHOD *meth, int (*finish)(DSA *));


DESCRIPTION

     The DSA_METHOD structure holds function pinters for custom DSA implemen-
     tations.

     DSA_meth_new() creates a new DSA_METHOD structure.  A copy of the NUL-
     terminated name is stored in the new DSA_METHOD object.  Any new DSA
     object constructed from this DSA_METHOD will have the given flags set by
     default.

     DSA_meth_dup() creates a deep copy of meth.  This might be useful for
     creating a new DSA_METHOD based on an existing one, but with some differ-
     ences.

     DSA_meth_free() destroys meth and frees any memory associated with it.

     DSA_meth_set_sign() sets the function used for creating a DSA signature.
     This function will be called from DSA_do_sign(3) and indirectly from
     DSA_sign(3).  The parameters of sign have the same meaning as for
     DSA_do_sign(3).

     DSA_meth_set_finish() sets an optional function for destroying a DSA
     object.  Unless finish is NULL, it will be called from DSA_free(3).  It
     takes the same argument and is intended to do DSA implementation specific
     cleanup.  The memory used by the DSA object itself should not be freed by
     the finish function.


RETURN VALUES

     DSA_meth_new() and DSA_meth_dup() return the newly allocated DSA_METHOD
     object or NULL on failure.

     All DSA_meth_set_*() functions return 1 on success or 0 on failure.


SEE ALSO

     DSA_do_sign(3), DSA_new(3), DSA_set_method(3), DSA_SIG_new(3),
     DSA_sign(3)


HISTORY

     These functions first appeared in OpenSSL 1.1.0 and have been available
     since OpenBSD 6.3.

DragonFly 5.5			March 18, 2018			 DragonFly 5.5

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