diff options
Diffstat (limited to 'src/tpm12/tpm_secret.c')
| -rw-r--r-- | src/tpm12/tpm_secret.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/tpm12/tpm_secret.c b/src/tpm12/tpm_secret.c new file mode 100644 index 0000000..8dedf14 --- /dev/null +++ b/src/tpm12/tpm_secret.c @@ -0,0 +1,166 @@ +/********************************************************************************/ +/* */ +/* Secret Data Handler */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: tpm_secret.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_store.h" + +#include "tpm_secret.h" + +void TPM_Secret_Init(TPM_SECRET tpm_secret) +{ + printf(" TPM_Secret_Init:\n"); + memset(tpm_secret, 0, TPM_SECRET_SIZE); + return; +} + +/* TPM_Secret_Load() + + deserialize the structure from a 'stream' + 'stream_size' is checked for sufficient data + returns 0 or error codes + + After use, call TPM_Secret_Delete() to free memory +*/ + +TPM_RESULT TPM_Secret_Load(TPM_SECRET tpm_secret, + unsigned char **stream, + uint32_t *stream_size) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Secret_Load:\n"); + rc = TPM_Loadn(tpm_secret, TPM_SECRET_SIZE, stream, stream_size); + return rc; +} + +/* TPM_Secret_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_Secret_Store(TPM_STORE_BUFFER *sbuffer, + const TPM_SECRET tpm_secret) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Secret_Store:\n"); + rc = TPM_Sbuffer_Append(sbuffer, tpm_secret, TPM_SECRET_SIZE); + return rc; +} + +/* TPM_Secret_Delete() + + No-OP if the parameter is NULL, else: + frees memory allocated for the secret + sets pointers to NULL + calls TPM_Secret_Init to set members back to default values + The secret itself is not freed + returns 0 or error codes +*/ + +void TPM_Secret_Delete(TPM_SECRET tpm_secret) +{ + printf(" TPM_Secret_Delete:\n"); + if (tpm_secret != NULL) { + TPM_Secret_Init(tpm_secret); + } + return; +} + +/* TPM_Secret_Copy() copies the source to the destination + */ + +void TPM_Secret_Copy(TPM_SECRET destination, const TPM_SECRET source) +{ + printf(" TPM_Secret_Copy:\n"); + memcpy(destination, source, TPM_SECRET_SIZE); + return; +} + +/* TPM_Secret_Compare() compares the source to the destination. + + Returns TPM_AUTHFAIL if the nonces are not equal +*/ + +TPM_RESULT TPM_Secret_Compare(TPM_SECRET expect, const TPM_SECRET actual) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Secret_Compare:\n"); + rc = memcmp(expect, actual, TPM_SECRET_SIZE); + if (rc != 0) { + printf("TPM_Secret_Compare: Error comparing secret\n"); + rc = TPM_AUTHFAIL; + } + return rc; +} + +/* TPM_Secret_Generate() generates a new TPM_SECRET from the random number generator + */ + +TPM_RESULT TPM_Secret_Generate(TPM_SECRET tpm_secret) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Secret_Generate:\n"); + rc = TPM_Random(tpm_secret, TPM_SECRET_SIZE); + return rc; +} + +/* TPM_Secret_XOR() XOR's the source and the destination, and returns the result on output. + */ + +void TPM_Secret_XOR(TPM_SECRET output, TPM_SECRET input1, TPM_SECRET input2) +{ + size_t i; + + printf(" TPM_Secret_XOR:\n"); + for (i = 0 ; i < TPM_SECRET_SIZE ; i++) { + output[i] = input1[i] ^ input2[i]; + } + return; +} |