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67 lines
2.1 KiB
67 lines
2.1 KiB
// This file was extracted from the TCG Published |
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// Trusted Platform Module Library |
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// Part 3: Commands |
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// Family "2.0" |
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// Level 00 Revision 01.16 |
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// October 30, 2014 |
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#include "InternalRoutines.h" |
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#include "PolicyNameHash_fp.h" |
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// |
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// |
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// Error Returns Meaning |
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// |
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// TPM_RC_CPHASH nameHash has been previously set to a different value |
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// TPM_RC_SIZE nameHash is not the size of the digest produced by the hash |
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// algorithm associated with policySession |
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// |
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TPM_RC |
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TPM2_PolicyNameHash( |
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PolicyNameHash_In *in // IN: input parameter list |
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) |
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{ |
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SESSION *session; |
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TPM_CC commandCode = TPM_CC_PolicyNameHash; |
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HASH_STATE hashState; |
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// Input Validation |
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// Get pointer to the session structure |
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session = SessionGet(in->policySession); |
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// A new nameHash is given in input parameter, but cpHash in session context |
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// is not empty |
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if(in->nameHash.t.size != 0 && session->u1.cpHash.t.size != 0) |
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return TPM_RC_CPHASH; |
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// A valid nameHash must have the same size as session hash digest |
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if(in->nameHash.t.size != CryptGetHashDigestSize(session->authHashAlg)) |
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return TPM_RC_SIZE + RC_PolicyNameHash_nameHash; |
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// Internal Data Update |
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// Update policy hash |
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// policyDigestnew = hash(policyDigestold || TPM_CC_PolicyNameHash || nameHash) |
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// Start hash |
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CryptStartHash(session->authHashAlg, &hashState); |
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// add old digest |
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CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b); |
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// add commandCode |
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CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode); |
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// add nameHash |
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CryptUpdateDigest2B(&hashState, &in->nameHash.b); |
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// complete the digest |
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CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b); |
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// clear iscpHashDefined bit to indicate now this field contains a nameHash |
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session->attributes.iscpHashDefined = CLEAR; |
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// update nameHash in session context |
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session->u1.cpHash = in->nameHash; |
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return TPM_RC_SUCCESS; |
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}
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