d2iSLSESION(3)                  OpenSL                 d2iSLSESION(3)



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 getses-
       sioncb() (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 allo-
       cate the memory and call i2dSLSESION() again.

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, 00 is returned and no operation is per-
       formed.

SEE ALSO
       ssl(3), SLSESIONfree(3), SLCTXsesssetgetcb(3)



0.9.7i                            2005-03-30                d2iSLSESION(3)