diff options
Diffstat (limited to 'src/tpm12/tpm_digest.c')
| -rw-r--r-- | src/tpm12/tpm_digest.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/tpm12/tpm_digest.c b/src/tpm12/tpm_digest.c new file mode 100644 index 0000000..0893912 --- /dev/null +++ b/src/tpm12/tpm_digest.c @@ -0,0 +1,162 @@ +/********************************************************************************/ +/* */ +/* Digest Handler */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: tpm_digest.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_debug.h" +#include "tpm_error.h" +#include "tpm_structures.h" + +#include "tpm_digest.h" + +/* TPM_Digest_Init resets a digest structure to zeros */ + +void TPM_Digest_Init(TPM_DIGEST tpm_digest) +{ + printf(" TPM_Digest_Init:\n"); + memset(tpm_digest, 0, TPM_DIGEST_SIZE); + return; +} + +/* TPM_Digest_Load() + + deserialize the structure from a 'stream' + 'stream_size' is checked for sufficient data + returns 0 or error codes +*/ + +TPM_RESULT TPM_Digest_Load(TPM_DIGEST tpm_digest, + unsigned char **stream, + uint32_t *stream_size) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Digest_Load:\n"); + rc = TPM_Loadn(tpm_digest, TPM_DIGEST_SIZE, stream, stream_size); + return rc; +} + +/* TPM_Digest_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_Digest_Store(TPM_STORE_BUFFER *sbuffer, + const TPM_DIGEST tpm_digest) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Digest_Store:\n"); + rc = TPM_Sbuffer_Append(sbuffer, tpm_digest, TPM_DIGEST_SIZE); + return rc; +} + +void TPM_Digest_Set(TPM_DIGEST tpm_digest) +{ + printf(" TPM_Digest_Set:\n"); + memset(tpm_digest, 0xff, TPM_DIGEST_SIZE); +} + +void TPM_Digest_Copy(TPM_DIGEST destination, const TPM_DIGEST source) +{ + printf(" TPM_Digest_Copy:\n"); + memcpy(destination, source, TPM_DIGEST_SIZE); + return; +} + +void TPM_Digest_XOR(TPM_DIGEST out, const TPM_DIGEST in1, const TPM_DIGEST in2) +{ + size_t i; + + printf(" TPM_Digest_XOR:\n"); + for (i = 0 ; i < TPM_DIGEST_SIZE ; i++) { + out[i] = in1[i] ^ in2[i]; + } + return; +} + +/* TPM_Digest_Compare() compares two digests, returning 0 if they are equal + */ + +TPM_RESULT TPM_Digest_Compare(const TPM_DIGEST expect, const TPM_DIGEST actual) +{ + TPM_RESULT rc = 0; + + printf(" TPM_Digest_Compare:\n"); + rc = memcmp(expect, actual, TPM_DIGEST_SIZE); + if (rc != 0) { + printf("TPM_Digest_Compare: Error comparing digest\n"); + TPM_PrintFour(" TPM_Digest_Compare: Expect", expect); + TPM_PrintFour(" TPM_Digest_Compare: Actual", actual); + rc = TPM_AUTHFAIL; + } + return rc; +} + +void TPM_Digest_IsZero(TPM_BOOL *isZero, TPM_DIGEST tpm_digest) +{ + size_t i; + + printf(" TPM_Digest_IsZero:\n"); + for (i = 0, *isZero = TRUE ; (i < TPM_DIGEST_SIZE) && *isZero ; i++) { + if (tpm_digest[i] != 0) { + *isZero = FALSE; + } + } + return; +} + +#if 0 +void TPM_Digest_IsMinusOne(TPM_BOOL *isMinusOne, TPM_DIGEST tpm_digest) +{ + size_t i; + + printf(" TPM_Digest_IsMinusOne:\n"); + for (i = 0, *isMinusOne = TRUE ; (i < TPM_DIGEST_SIZE) && *isMinusOne ; i++) { + if (tpm_digest[i] != 0xff) { + *isMinusOne = FALSE; + } + } + return; +} +#endif |