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Diffstat (limited to 'src/tpm2/crypto/openssl/CryptSmac.c')
| -rw-r--r-- | src/tpm2/crypto/openssl/CryptSmac.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/tpm2/crypto/openssl/CryptSmac.c b/src/tpm2/crypto/openssl/CryptSmac.c new file mode 100644 index 0000000..c4b3515 --- /dev/null +++ b/src/tpm2/crypto/openssl/CryptSmac.c @@ -0,0 +1,156 @@ +/********************************************************************************/ +/* */ +/* Message Authentication Codes Based on a Symmetric Block Cipher */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: CryptSmac.c 1658 2021-01-22 23:14:01Z kgoldman $ */ +/* */ +/* Licenses and Notices */ +/* */ +/* 1. Copyright Licenses: */ +/* */ +/* - Trusted Computing Group (TCG) grants to the user of the source code in */ +/* this specification (the "Source Code") a worldwide, irrevocable, */ +/* nonexclusive, royalty free, copyright license to reproduce, create */ +/* derivative works, distribute, display and perform the Source Code and */ +/* derivative works thereof, and to grant others the rights granted herein. */ +/* */ +/* - The TCG grants to the user of the other parts of the specification */ +/* (other than the Source Code) the rights to reproduce, distribute, */ +/* display, and perform the specification solely for the purpose of */ +/* developing products based on such documents. */ +/* */ +/* 2. Source Code Distribution Conditions: */ +/* */ +/* - Redistributions of Source Code must retain the above copyright licenses, */ +/* this list of conditions and the following disclaimers. */ +/* */ +/* - Redistributions in binary form must reproduce the above copyright */ +/* licenses, this list of conditions and the following disclaimers in the */ +/* documentation and/or other materials provided with the distribution. */ +/* */ +/* 3. Disclaimers: */ +/* */ +/* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */ +/* LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH */ +/* RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES) */ +/* THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE. */ +/* Contact TCG Administration (admin@trustedcomputinggroup.org) for */ +/* information on specification licensing rights available through TCG */ +/* membership agreements. */ +/* */ +/* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */ +/* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */ +/* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */ +/* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */ +/* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */ +/* */ +/* - Without limitation, TCG and its members and licensors disclaim all */ +/* liability, including liability for infringement of any proprietary */ +/* rights, relating to use of information in this specification and to the */ +/* implementation of this specification, and TCG disclaims all liability for */ +/* cost of procurement of substitute goods or services, lost profits, loss */ +/* of use, loss of data or any incidental, consequential, direct, indirect, */ +/* or special damages, whether under contract, tort, warranty or otherwise, */ +/* arising in any way out of use or reliance upon this specification or any */ +/* information herein. */ +/* */ +/* (c) Copyright IBM Corp. and others, 2018 - 2021 */ +/* */ +/********************************************************************************/ + +/* 10.2.20 CryptSmac.c */ +/* 10.2.20.1 Introduction */ +/* This file contains the implementation of the message authentication codes based on a symmetric + block cipher. These functions only use the single block encryption functions of the selected + symmetric cryptographic library. */ +/* 10.2.20.2 Includes, Defines, and Typedefs */ +#define _CRYPT_HASH_C_ +#include "Tpm.h" +#if SMAC_IMPLEMENTED + /* 10.2.20.2.1 CryptSmacStart() */ + /* Function to start an SMAC. */ +UINT16 +CryptSmacStart( + HASH_STATE *state, + TPMU_PUBLIC_PARMS *keyParameters, + TPM_ALG_ID macAlg, // IN: the type of MAC + TPM2B *key + ) +{ + UINT16 retVal = 0; + // + // Make sure that the key size is correct. This should have been checked + // at key load, but... + if(BITS_TO_BYTES(keyParameters->symDetail.sym.keyBits.sym) == key->size) + { + switch(macAlg) + { +#if ALG_CMAC + case TPM_ALG_CMAC: + retVal = CryptCmacStart(&state->state.smac, keyParameters, + macAlg, key); + break; +#endif + default: + break; + } + } + state->type = (retVal != 0) ? HASH_STATE_SMAC : HASH_STATE_EMPTY; + return retVal; +} +/* 10.2.20.2.2 CryptMacStart() */ +/* Function to start either an HMAC or an SMAC. Cannot reuse the CryptHmacStart() function because + of the difference in number of parameters. */ +UINT16 +CryptMacStart( + HMAC_STATE *state, + TPMU_PUBLIC_PARMS *keyParameters, + TPM_ALG_ID macAlg, // IN: the type of MAC + TPM2B *key + ) +{ + MemorySet(state, 0, sizeof(HMAC_STATE)); + if(CryptHashIsValidAlg(macAlg, FALSE)) + { + return CryptHmacStart(state, macAlg, key->size, key->buffer); + } + else if(CryptSmacIsValidAlg(macAlg, FALSE)) + { + return CryptSmacStart(&state->hashState, keyParameters, macAlg, key); + } + else + return 0; +} +/* 10.2.20.2.3 CryptMacEnd() */ +/* Dispatch to the MAC end function using a size and buffer pointer. */ +UINT16 +CryptMacEnd( + HMAC_STATE *state, + UINT32 size, + BYTE *buffer + ) +{ + UINT16 retVal = 0; + if(state->hashState.type == HASH_STATE_SMAC) + retVal = (state->hashState.state.smac.smacMethods.end)( + &state->hashState.state.smac.state, size, buffer); + else if(state->hashState.type == HASH_STATE_HMAC) + retVal = CryptHmacEnd(state, size, buffer); + state->hashState.type = HASH_STATE_EMPTY; + return retVal; +} +#if 0 /* libtpms added */ +/* 10.2.20.2.4 CryptMacEnd2B() */ +/* Dispatch to the MAC end function using a 2B. */ +UINT16 +CryptMacEnd2B ( + HMAC_STATE *state, + TPM2B *data + ) +{ + return CryptMacEnd(state, data->size, data->buffer); +} +#endif /* libtpms added */ +#endif // SMAC_IMPLEMENTED + |