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140 .IX Title "d2i_DSAPublicKey 3"
141 .TH d2i_DSAPublicKey 3 "0.9.7a" "2003-02-19" "OpenSSL"
144 d2i_DSAPublicKey, i2d_DSAPublicKey, d2i_DSAPrivateKey, i2d_DSAPrivateKey,
145 d2i_DSA_PUBKEY, i2d_DSA_PUBKEY, d2i_DSA_SIG, i2d_DSA_SIG \- \s-1DSA\s0 key encoding
146 and parsing functions.
148 .IX Header "SYNOPSIS"
150 \& #include <openssl/dsa.h>
153 \& DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length);
156 \& int i2d_DSAPublicKey(const DSA *a, unsigned char **pp);
159 \& DSA * d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length);
162 \& int i2d_DSA_PUBKEY(const DSA *a, unsigned char **pp);
165 \& DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length);
168 \& int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp);
171 \& DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length);
174 \& int i2d_DSAparams(const DSA *a, unsigned char **pp);
177 \& DSA * d2i_DSA_SIG(DSA_SIG **a, const unsigned char **pp, long length);
180 \& int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
183 .IX Header "DESCRIPTION"
184 \&\fId2i_DSAPublicKey()\fR and \fIi2d_DSAPublicKey()\fR decode and encode the \s-1DSA\s0 public key
185 components structure.
187 \&\fId2i_DSA_PUKEY()\fR and \fIi2d_DSA_PUKEY()\fR decode and encode an \s-1DSA\s0 public key using a
188 SubjectPublicKeyInfo (certificate public key) structure.
190 \&\fId2i_DSAPrivateKey()\fR, \fIi2d_DSAPrivateKey()\fR decode and encode the \s-1DSA\s0 private key
193 \&\fId2i_DSAparams()\fR, \fIi2d_DSAparams()\fR decode and encode the \s-1DSA\s0 parameters using
194 a \fBDss-Parms\fR structure as defined in \s-1RFC2459\s0.
196 \&\fId2i_DSA_SIG()\fR, \fIi2d_DSA_SIG()\fR decode and encode a \s-1DSA\s0 signature using a
197 \&\fBDss-Sig-Value\fR structure as defined in \s-1RFC2459\s0.
199 The usage of all of these functions is similar to the \fId2i_X509()\fR and
200 \&\fIi2d_X509()\fR described in the d2i_X509(3) manual page.
203 The \fB\s-1DSA\s0\fR structure passed to the private key encoding functions should have
204 all the private key components present.
206 The data encoded by the private key functions is unencrypted and therefore
207 offers no private key security.
209 The \fB\s-1DSA_PUBKEY\s0\fR functions should be used in preference to the \fBDSAPublicKey\fR
210 functions when encoding public keys because they use a standard format.
212 The \fBDSAPublicKey\fR functions use an non standard format the actual data encoded
213 depends on the value of the \fBwrite_params\fR field of the \fBa\fR key parameter.
214 If \fBwrite_params\fR is zero then only the \fBpub_key\fR field is encoded as an
215 \&\fB\s-1INTEGER\s0\fR. If \fBwrite_params\fR is 1 then a \fB\s-1SEQUENCE\s0\fR consisting of the
216 \&\fBp\fR, \fBq\fR, \fBg\fR and \fBpub_key\fR respectively fields are encoded.
218 The \fBDSAPrivateKey\fR functions also use a non standard structure consiting
219 consisting of a \s-1SEQUENCE\s0 containing the \fBp\fR, \fBq\fR, \fBg\fR and \fBpub_key\fR and
220 \&\fBpriv_key\fR fields respectively.
222 .IX Header "SEE ALSO"