Install a transformer callback (for debugging). Transformer is called on several code-paths in creating SW-generated keys, import blobs, and activation blobs. Transformer can arbitrarily manipulate the byte array parameter and the transformed value will be used (this allows a caller to transform parameters that are hard to affect in the raw TPM command because they are protected by crypto. Note that the transformer callback should only work on a fraction (say 10%) of the calls because the it is called several times during preparation of some data structures and if one always modifies the first then it is possible that the second is never processed by the TPM.
