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krb5_c_derive_prfplus - Derive a key using some input data (via RFC 6113 PRF+).
=================================================================================
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.. c:function:: krb5_error_code krb5_c_derive_prfplus(krb5_context context, const krb5_keyblock * k, const krb5_data * input, krb5_enctype enctype, krb5_keyblock ** out)
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:param:
**[in]** **context** - Library context
**[in]** **k** - KDC contribution key
**[in]** **input** - Input string
**[in]** **enctype** - Output key enctype (or **ENCTYPE_NULL** )
**[out]** **out** - Derived keyblock
..
..
This function uses PRF+ as defined in RFC 6113 to derive a key from another key and an input string. If *enctype* is **ENCTYPE_NULL** , the output key will have the same enctype as the input key.
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