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Tspi_DAA_VerifySignature(3)			   Tspi_DAA_VerifySignature(3)

		   TCG Software Stack Developer's Reference


Tspi_DAA_VerifySignature - creates a challenge for the TCG platform


#include <tss/tss_typedef.h> #include <tss/tss_structs.h> #include <tss/tspi.h> TSPICALL Tspi_DAA_VerifySignature( TSS_HDAA hDAA, TSS_DAA_SIGNATURE daaSignature, TSS_HKEY hPubKeyIssuer, TSS_DAA_SIGN_DATA signData, UINT32 attributesLength, BYTE** attributes, UINT32 nonceVerifierLength, BYTE* nonceVerifier, UINT32 baseNameLength, BYTE* baseName, TSS_BOOL* isCorrect );


Tspi_DAA_VerifySignature is part of the DAA Verifier component. It's the last function out of 2 in order to verify a DAA Credential of a TCG platform. It verifies the DAA Credential and detects public rogue TPMs. This is an optional function and does not require a TPM or a TCS.


hDAA The hDAA parameter is used to specify the handle of the DAA object. daaSignature The daaSignature parameter is the DAA signature contains proof of own- ership of the DAA Credential, as well as a signature on either an AIK or a message. hPubKeyIssuer The hPubKeyIssuer parameter is the handle of the DAA public key of the DAA Issuer of the credential. signData The signData parameter defines what data is signed (AIK or message). attributesLength The attributesLength parameter is the Length of attributes array that is determined by the DAA Issuer public key (lh+li). The length of a single attribute is lf/8. attributes The attributes parameter is the array of attributes which the DAA Cre- dential owner reveals. nonceVerifierLength The nonceVerifierLength parameter is the length of nonceVerifier (20 bytes). nonceVerifier The nonceVerifier parameter is the nonce that was computed in the pre- vious function (Tspi_VerifyInit). baseNameLength The baseNameLength parameter the length of the baseName. baseName The baseName parameter is the base name that was chosen for the DAA Signature. isCorrect The isCorrect parameter denotes if the verification of the DAA Signa- ture was successful.


Tspi_DAA_VerifySignature returns TSS_SUCCESS on success, otherwise one of the following values is returned: TSS_E_BAD_PARAMETER TSS_E_INTERNAL_ERROR An internal SW error has been detected. CONFORMING TO Tspi_DAA_VerifySignature conforms to the Trusted Computing Group Soft- ware Specification version 1.2


Tspi_DAA_IssuerKeyVerification(3) TSS 1.2 2006-09-04 Tspi_DAA_VerifySignature(3)

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