NAME
d2i_DSAPublicKey, i2d_DSAPublicKey, d2i_DSAPrivateKey, i2d_DSAPrivateKey, d2i_DSA_PUBKEY, i2d_DSA_PUBKEY, d2i_DSA_SIG, i2d_DSA_SIG — DSA key encoding and parsing functions.
Synopsis
#include <openssl/dsa.h>
DSA
* d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
int
i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
DSA
* d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length);
int
i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp);
DSA
* d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
int
i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
DSA
* d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
int
i2d_DSAparams(const DSA *a, unsigned char **pp);
DSA *
d2i_DSA_SIG(DSA_SIG **a, const unsigned char **pp, long length);
int
i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
DESCRIPTION
d2i_DSAPublicKey() and i2d_DSAPublicKey() decode and encode
the DSA public key components structure.
d2i_DSA_PUKEY() and i2d_DSA_PUKEY() decode and encode an DSA
public key using a SubjectPublicKeyInfo (certificate public key)
structure.
d2i_DSAPrivateKey(), i2d_DSAPrivateKey() decode and encode
the DSA private key components.
d2i_DSAparams(), i2d_DSAparams() decode and encode the DSA
parameters using a Dss-Parms structure as defined
in RFC2459.
d2i_DSA_SIG(), i2d_DSA_SIG() decode and encode a DSA signature
using a Dss-Sig-Value structure as defined
in RFC2459.
The usage of all of these functions is similar to the d2i_X509()
and i2d_X509() described in the d2i_X509(3) manual
page.
NOTES
The DSA structure passed to the private
key encoding functions should have all the private key components present.
The data encoded by the private key functions is unencrypted
and therefore offers no private key security.
The DSA_PUBKEY functions should be used
in preference to the DSAPublicKey functions
when encoding public keys because they use a standard format.
The DSAPublicKey functions use an non
standard format the actual data encoded depends on the value of
the write_params field of the a key
parameter. If write_params is zero then only
the pub_key field is encoded as an INTEGER.
If write_params is 1 then a SEQUENCE consisting
of the p, q, g and pub_key respectively fields
are encoded.
The DSAPrivateKey functions also use
a non standard structure consiting consisting of a SEQUENCE containing
the p, q, g and pub_key and priv_key fields
respectively.
