NAME¶
d2i_DSAPublicKey, i2d_DSAPublicKey, d2i_DSAPrivateKey, i2d_DSAPrivateKey,
d2i_DSA_PUBKEY, i2d_DSA_PUBKEY, d2i_DSAparams, i2d_DSAparams, d2i_DSA_SIG,
i2d_DSA_SIG - DSA key encoding and parsing functions.
SYNOPSIS¶
#include <openssl/dsa.h>
#include <openssl/x509.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_PUBKEY() and
i2d_DSA_PUBKEY() 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.
SEE ALSO¶
d2i_X509(3)
HISTORY¶
TBA