1=pod
2
3=head1 NAME
4
5d2i_DSAPublicKey, i2d_DSAPublicKey, d2i_DSAPrivateKey, i2d_DSAPrivateKey,
6d2i_DSA_PUBKEY, i2d_DSA_PUBKEY, d2i_DSAparams, i2d_DSAparams, d2i_DSA_SIG, i2d_DSA_SIG - DSA key encoding
7and parsing functions.
8
9=head1 SYNOPSIS
10
11 #include <openssl/dsa.h>
12 #include <openssl/x509.h>
13
14 DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
15
16 int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
17
18 DSA * d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length);
19
20 int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp);
21
22 DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
23
24 int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
25
26 DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
27
28 int i2d_DSAparams(const DSA *a, unsigned char **pp);
29
30 DSA * d2i_DSA_SIG(DSA_SIG **a, const unsigned char **pp, long length);
31
32 int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
33
34=head1 DESCRIPTION
35
36d2i_DSAPublicKey() and i2d_DSAPublicKey() decode and encode the DSA public key
37components structure.
38
39d2i_DSA_PUBKEY() and i2d_DSA_PUBKEY() decode and encode an DSA public key using
40a SubjectPublicKeyInfo (certificate public key) structure.
41
42d2i_DSAPrivateKey(), i2d_DSAPrivateKey() decode and encode the DSA private key
43components.
44
45d2i_DSAparams(), i2d_DSAparams() decode and encode the DSA parameters using
46a B<Dss-Parms> structure as defined in RFC2459.
47
48d2i_DSA_SIG(), i2d_DSA_SIG() decode and encode a DSA signature using a
49B<Dss-Sig-Value> structure as defined in RFC2459.
50
51The usage of all of these functions is similar to the d2i_X509() and
52i2d_X509() described in the L<d2i_X509(3)|d2i_X509(3)> manual page.
53
54=head1 NOTES
55
56The B<DSA> structure passed to the private key encoding functions should have
57all the private key components present.
58
59The data encoded by the private key functions is unencrypted and therefore
60offers no private key security.
61
62The B<DSA_PUBKEY> functions should be used in preference to the B<DSAPublicKey>
63functions when encoding public keys because they use a standard format.
64
65The B<DSAPublicKey> functions use an non standard format the actual data encoded
66depends on the value of the B<write_params> field of the B<a> key parameter.
67If B<write_params> is zero then only the B<pub_key> field is encoded as an
68B<INTEGER>. If B<write_params> is 1 then a B<SEQUENCE> consisting of the
69B<p>, B<q>, B<g> and B<pub_key> respectively fields are encoded.
70
71The B<DSAPrivateKey> functions also use a non standard structure consiting
72consisting of a SEQUENCE containing the B<p>, B<q>, B<g> and B<pub_key> and
73B<priv_key> fields respectively.
74
75=head1 SEE ALSO
76
77L<d2i_X509(3)|d2i_X509(3)>
78
79=head1 HISTORY
80
81TBA
82
83=cut
84