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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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Diffstat (limited to 'openssl/doc/ssl/d2i_SSL_SESSION.pod')
-rw-r--r--openssl/doc/ssl/d2i_SSL_SESSION.pod66
1 files changed, 66 insertions, 0 deletions
diff --git a/openssl/doc/ssl/d2i_SSL_SESSION.pod b/openssl/doc/ssl/d2i_SSL_SESSION.pod
new file mode 100644
index 000000000..81d276477
--- /dev/null
+++ b/openssl/doc/ssl/d2i_SSL_SESSION.pod
@@ -0,0 +1,66 @@
+=pod
+
+=head1 NAME
+
+d2i_SSL_SESSION, i2d_SSL_SESSION - convert SSL_SESSION object from/to ASN1 representation
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, long length);
+ int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);
+
+=head1 DESCRIPTION
+
+d2i_SSL_SESSION() transforms the external ASN1 representation of an SSL/TLS
+session, stored as binary data at location B<pp> with length B<length>, into
+an SSL_SESSION object.
+
+i2d_SSL_SESSION() transforms the SSL_SESSION object B<in> into the ASN1
+representation and stores it into the memory location pointed to by B<pp>.
+The length of the resulting ASN1 representation is returned. If B<pp> is
+the NULL pointer, only the length is calculated and returned.
+
+=head1 NOTES
+
+The SSL_SESSION object is built from several malloc()ed parts, it can
+therefore not be moved, copied or stored directly. In order to store
+session data on disk or into a database, it must be transformed into
+a binary ASN1 representation.
+
+When using d2i_SSL_SESSION(), the SSL_SESSION object is automatically
+allocated. The reference count is 1, so that the session must be
+explicitly removed using L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>,
+unless the SSL_SESSION object is completely taken over, when being called
+inside the get_session_cb() (see
+L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>).
+
+SSL_SESSION objects keep internal link information about the session cache
+list, when being inserted into one SSL_CTX object's session cache.
+One SSL_SESSION object, regardless of its reference count, must therefore
+only be used with one SSL_CTX object (and the SSL objects created
+from this SSL_CTX object).
+
+When using i2d_SSL_SESSION(), the memory location pointed to by B<pp> must be
+large enough to hold the binary representation of the session. There is no
+known limit on the size of the created ASN1 representation, so the necessary
+amount of space should be obtained by first calling i2d_SSL_SESSION() with
+B<pp=NULL>, and obtain the size needed, then allocate the memory and
+call i2d_SSL_SESSION() again.
+
+=head1 RETURN VALUES
+
+d2i_SSL_SESSION() returns a pointer to the newly allocated SSL_SESSION
+object. In case of failure the NULL-pointer is returned and the error message
+can be retrieved from the error stack.
+
+i2d_SSL_SESSION() returns the size of the ASN1 representation in bytes.
+When the session is not valid, B<0> is returned and no operation is performed.
+
+=head1 SEE ALSO
+
+L<ssl(3)|ssl(3)>, L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>,
+L<SSL_CTX_sess_set_get_cb(3)|SSL_CTX_sess_set_get_cb(3)>
+
+=cut