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Diffstat (limited to '')
| -rw-r--r-- | src/tpm12/tpm_nonce.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/tpm12/tpm_nonce.c b/src/tpm12/tpm_nonce.c new file mode 100644 index 0000000..115bef6 --- /dev/null +++ b/src/tpm12/tpm_nonce.c @@ -0,0 +1,157 @@ +/********************************************************************************/ +/* */ +/* Nonce Handler */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: tpm_nonce.c 4071 2010-04-29 19:26:45Z kgoldman $ */ +/* */ +/* (c) Copyright IBM Corporation 2006, 2010. */ +/* */ +/* All rights reserved. */ +/* */ +/* Redistribution and use in source and binary forms, with or without */ +/* modification, are permitted provided that the following conditions are */ +/* met: */ +/* */ +/* Redistributions of source code must retain the above copyright notice, */ +/* this list of conditions and the following disclaimer. */ +/* */ +/* Redistributions in binary form must reproduce the above copyright */ +/* notice, this list of conditions and the following disclaimer in the */ +/* documentation and/or other materials provided with the distribution. */ +/* */ +/* Neither the names of the IBM Corporation nor the names of its */ +/* contributors may be used to endorse or promote products derived from */ +/* this software without specific prior written permission. */ +/* */ +/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */ +/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */ +/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */ +/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */ +/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */ +/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ +/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */ +/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */ +/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */ +/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */ +/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +/********************************************************************************/ + +#include <stdio.h> +#include <string.h> + +#include "tpm_crypto.h" +#include "tpm_debug.h" +#include "tpm_error.h" +#include "tpm_structures.h" + +#include "tpm_nonce.h" + +/* TPM_Nonce_Init resets a nonce structure to zeros */ + +void TPM_Nonce_Init(TPM_NONCE tpm_nonce) +{ + size_t i; + + printf(" TPM_Nonce_Init:\n"); + for (i = 0 ; i < TPM_NONCE_SIZE ; i++) { + tpm_nonce[i] = 0; + } + return; +} + +/* TPM_Nonce_Load() + + deserialize the structure from a 'stream' + 'stream_size' is checked for sufficient data + returns 0 or error codes +*/ + + +TPM_RESULT TPM_Nonce_Load(TPM_NONCE tpm_nonce, + unsigned char **stream, + uint32_t *stream_size) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Nonce_Load:\n"); + rc = TPM_Loadn(tpm_nonce, TPM_NONCE_SIZE, stream, stream_size); + return rc; +} + +/* TPM_Nonce_Store() + + serialize the structure to a stream contained in 'sbuffer' + returns 0 or error codes + + After use, call TPM_Sbuffer_Delete() to free memory +*/ + +TPM_RESULT TPM_Nonce_Store(TPM_STORE_BUFFER *sbuffer, + const TPM_NONCE tpm_nonce) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Nonce_Store:\n"); + rc = TPM_Sbuffer_Append(sbuffer, tpm_nonce, TPM_NONCE_SIZE); + return rc; +} + +/* TPM_Nonce_Copy() copies the source to the destination + */ + +void TPM_Nonce_Copy(TPM_NONCE destination, const TPM_NONCE source) +{ + printf(" TPM_Nonce_Copy:\n"); + memcpy(destination, source, TPM_NONCE_SIZE); + return; +} + +/* TPM_Nonce_Compare() compares the source to the destination. + + Returns TPM_AUTHFAIL if the nonces are not equal +*/ + +TPM_RESULT TPM_Nonce_Compare(TPM_NONCE expect, const TPM_NONCE actual) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Nonce_Compare:\n"); + rc = memcmp(expect, actual, TPM_NONCE_SIZE); + if (rc != 0) { + printf("TPM_Nonce_Compare: Error comparing nonce\n"); + TPM_PrintFour(" TPM_Nonce_Compare: Expect", expect); + TPM_PrintFour(" TPM_Nonce_Compare: Actual", actual); + rc = TPM_AUTHFAIL; + } + return rc; +} + +/* TPM_Nonce_Generate() generates a new nonce from the random number generator + */ + +TPM_RESULT TPM_Nonce_Generate(TPM_NONCE tpm_nonce) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Nonce_Generate:\n"); + rc = TPM_Random(tpm_nonce, TPM_NONCE_SIZE); + return rc; +} + +/* TPM_Nonce_IsZero() returns 'isZero' TRUE is all bytes 'tpm_nonce' are 0x00 + */ + +void TPM_Nonce_IsZero(TPM_BOOL *isZero, TPM_NONCE tpm_nonce) +{ + size_t i; + + printf(" TPM_Nonce_IsZero:\n"); + for (i = 0, *isZero = TRUE ; (i < TPM_NONCE_SIZE) && *isZero ; i++) { + if (tpm_nonce[i] != 0) { + *isZero = FALSE; + } + } + return; +} + |