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https://github.com/stefanberger/libtpms
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88 lines
4.2 KiB
C
88 lines
4.2 KiB
C
/********************************************************************************/
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/* */
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/* */
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/* Written by Ken Goldman */
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/* IBM Thomas J. Watson Research Center */
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/* */
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/* Licenses and Notices */
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/* */
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/* 1. Copyright Licenses: */
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/* */
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/* - Trusted Computing Group (TCG) grants to the user of the source code in */
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/* this specification (the "Source Code") a worldwide, irrevocable, */
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/* nonexclusive, royalty free, copyright license to reproduce, create */
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/* derivative works, distribute, display and perform the Source Code and */
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/* derivative works thereof, and to grant others the rights granted herein. */
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/* */
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/* - The TCG grants to the user of the other parts of the specification */
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/* (other than the Source Code) the rights to reproduce, distribute, */
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/* display, and perform the specification solely for the purpose of */
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/* developing products based on such documents. */
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/* */
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/* 2. Source Code Distribution Conditions: */
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/* */
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/* - Redistributions of Source Code must retain the above copyright licenses, */
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/* this list of conditions and the following disclaimers. */
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/* */
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/* - Redistributions in binary form must reproduce the above copyright */
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/* licenses, this list of conditions and the following disclaimers in the */
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/* documentation and/or other materials provided with the distribution. */
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/* */
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/* 3. Disclaimers: */
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/* */
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/* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */
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/* LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH */
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/* RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES) */
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/* THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE. */
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/* Contact TCG Administration (admin@trustedcomputinggroup.org) for */
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/* information on specification licensing rights available through TCG */
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/* membership agreements. */
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/* */
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/* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */
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/* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */
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/* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */
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/* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */
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/* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */
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/* */
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/* - Without limitation, TCG and its members and licensors disclaim all */
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/* liability, including liability for infringement of any proprietary */
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/* rights, relating to use of information in this specification and to the */
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/* implementation of this specification, and TCG disclaims all liability for */
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/* cost of procurement of substitute goods or services, lost profits, loss */
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/* of use, loss of data or any incidental, consequential, direct, indirect, */
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/* or special damages, whether under contract, tort, warranty or otherwise, */
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/* arising in any way out of use or reliance upon this specification or any */
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/* information herein. */
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/* */
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/* (c) Copyright IBM Corp. and others, 2023 */
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/* */
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/********************************************************************************/
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// functions shared by multiple signature algorithms
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#ifndef _TPMECC_SIGNATURE_UTIL_FP_H_
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#define _TPMECC_SIGNATURE_UTIL_FP_H_
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#if ALG_ECC
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//*** TpmEcc_SchnorrCalculateS()
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// This contains the Schnorr signature (S) computation. It is used by both ECDSA and
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// Schnorr signing. The result is computed as: ['s' = 'k' + 'r' * 'd' (mod 'n')]
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// where
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// 1) 's' is the signature
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// 2) 'k' is a random value
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// 3) 'r' is the value to sign
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// 4) 'd' is the private EC key
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// 5) 'n' is the order of the curve
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// Return Type: TPM_RC
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// TPM_RC_NO_RESULT the result of the operation was zero or 'r' (mod 'n')
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// is zero
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TPM_RC TpmEcc_SchnorrCalculateS(
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Crypt_Int* bnS, // OUT: 's' component of the signature
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const Crypt_Int* bnK, // IN: a random value
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Crypt_Int* bnR, // IN: the signature 'r' value
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const Crypt_Int* bnD, // IN: the private key
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const Crypt_Int* bnN // IN: the order of the curve
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);
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#endif // ALG_ECC
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#endif // _TPMECC_SIGNATURE_UTIL_FP_H_
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