krb5_k_prf -  Generate enctype-specific pseudo-random bytes (operates on opaque key). 
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.. c:function:: krb5_error_code krb5_k_prf(krb5_context context, krb5_key key, krb5_data * input, krb5_data * output)

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:param:

	          **[in]** **context** - Library context

	          **[in]** **key** - Key

	          **[in]** **input** - Input data

	          **[out]** **output** - Output data


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:retval:
         -   0   Success; otherwise - Kerberos error codes


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This function selects a pseudo-random function based on *key* and computes its value over *input* , placing the result into *output* . The caller must preinitialize *output* and allocate space for the result.










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.. note::

	 This function is similar to :c:func:`krb5_c_prf()` , but operates on opaque *key* .