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NAME

     d2i_SSL_SESSION, i2d_SSL_SESSION - convert SSL_SESSION
     object from/to ASN1 representation



SYNOPSIS
      #include <openssl/ssl.h>

      SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, long length);
      int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);




DESCRIPTION
     d2i_SSL_SESSION() transforms the external ASN1
     representation of an SSL/TLS session, stored as binary data
     at location pp with length length, into an SSL_SESSION
     object.

     i2d_SSL_SESSION() transforms the SSL_SESSION object in into
     the ASN1 representation and stores it into the memory
     location pointed to by pp.  The length of the resulting ASN1
     representation is returned. If pp is the NULL pointer, only
     the length is calculated and returned.



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.

     When using i2d_SSL_SESSION(), the memory location pointed to
     by 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 pp=NULL, and obtain the size needed, then allocate the
     memory and call i2d_SSL_SESSION() again.



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, 0
     is returned and no operation is performed.




SEE ALSO
     ssl(3), SSL_CTX_sess_set_get_cb(3)









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Created 1996-2024 by Maxim Chirkov

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