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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/ssl/d2i_SSL_SESSION.pod | |
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Diffstat (limited to 'openssl/doc/ssl/d2i_SSL_SESSION.pod')
-rw-r--r-- | openssl/doc/ssl/d2i_SSL_SESSION.pod | 66 |
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 |