OpenSL                                 d2iSLSESION(3openssl)



NAME
     d2iSLSESION, i2dSLSESION - convert SLSESION
     object from/to ASN1 representation

SYNOPSIS
      #include 

      SLSESION *d2iSLSESION(SLSESION **a, const unsigned char **pp, long length);
      int i2dSLSESION(SLSESION *in, unsigned char **pp);

DESCRIPTION
     d2iSLSESION() transforms the external ASN1
     representation of an SL/TLS session, stored as binary data
     at location pp with length length, into an SLSESION
     object.

     i2dSLSESION() transforms the SLSESION 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 NUL pointer, only
     the length is calculated and returned.

NOTES
     The SLSESION 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 d2iSLSESION(), the SLSESION object is
     automatically allocated. The reference count is 1, so that
     the session must be explicitly removed using
     SLSESIONfree(3), unless the SLSESION object is
     completely taken over, when being called inside the
     getsessioncb() (see SLCTXsesssetgetcb(3)).

     SLSESION objects keep internal link information about the
     session cache list, when being inserted into one SLCTX
     object's session cache.  One SLSESION object, regardless
     of its reference count, must therefore only be used with one
     SLCTX object (and the SL objects created from this
     SLCTX object).

     When using i2dSLSESION(), 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 i2dSLSESION()
     with pp=NUL, and obtain the size needed, then allocate the
     memory and call i2dSLSESION() again.





OpenSL-0.9.8       Last change: Oct 11 2005                    1






OpenSL                                 d2iSLSESION(3openssl)



RETURN VALUES
     d2iSLSESION() returns a pointer to the newly allocated
     SLSESION object. In case of failure the NUL-pointer is
     returned and the error message can be retrieved from the
     error stack.

     i2dSLSESION() 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), SLSESIONfree(3), SLCTXsesssetgetcb(3)











































OpenSL-0.9.8       Last change: Oct 11 2005                    2