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      1 
      2 /*
      3  * Licensed Materials - Property of IBM
      4  *
      5  * trousers - An open source TCG Software Stack
      6  *
      7  * (C) Copyright International Business Machines Corp. 2007
      8  *
      9  */
     10 
     11 
     12 #include <stdlib.h>
     13 #include <stdio.h>
     14 #include <string.h>
     15 
     16 #include "trousers/tss.h"
     17 #include "trousers_types.h"
     18 #include "tcs_tsp.h"
     19 #include "tcs_utils.h"
     20 #include "tcs_int_literals.h"
     21 #include "capabilities.h"
     22 #include "tcslog.h"
     23 #include "tcsps.h"
     24 #include "req_mgr.h"
     25 
     26 
     27 TSS_RESULT
     28 TCSP_ReadCurrentTicks_Internal(TCS_CONTEXT_HANDLE hContext,
     29 			       UINT32*            pulCurrentTime,
     30 			       BYTE**             prgbCurrentTime)
     31 {
     32 	TSS_RESULT result;
     33 	UINT32 paramSize;
     34 	UINT64 offset = 0;
     35 	BYTE txBlob[TSS_TPM_TXBLOB_SIZE];
     36 
     37 	if ((result = ctx_verify_context(hContext)))
     38 		return result;
     39 
     40 	if ((result = tpm_rqu_build(TPM_ORD_GetTicks, &offset, txBlob, NULL)))
     41 		return result;
     42 
     43 	if ((result = req_mgr_submit_req(txBlob)))
     44 		goto done;
     45 
     46 	result = UnloadBlob_Header(txBlob, &paramSize);
     47 	if (!result)
     48 		result = tpm_rsp_parse(TPM_ORD_GetTicks, txBlob, paramSize, pulCurrentTime,
     49 				       prgbCurrentTime, NULL);
     50 
     51 done:
     52 	return result;
     53 }
     54 
     55 TSS_RESULT
     56 TCSP_TickStampBlob_Internal(TCS_CONTEXT_HANDLE hContext,
     57 			    TCS_KEY_HANDLE     hKey,
     58 			    TPM_NONCE*         antiReplay,
     59 			    TPM_DIGEST*        digestToStamp,
     60 			    TPM_AUTH*          privAuth,
     61 			    UINT32*            pulSignatureLength,
     62 			    BYTE**             prgbSignature,
     63 			    UINT32*            pulTickCountLength,
     64 			    BYTE**             prgbTickCount)
     65 {
     66 	TSS_RESULT result;
     67 	UINT32 paramSize;
     68 	UINT64 offset = 0;
     69 	TPM_KEY_HANDLE keySlot;
     70 	BYTE txBlob[TSS_TPM_TXBLOB_SIZE];
     71 
     72 	if ((result = ctx_verify_context(hContext)))
     73 		return result;
     74 
     75 	if (privAuth) {
     76 		if ((result = auth_mgr_check(hContext, &privAuth->AuthHandle)))
     77 			goto done;
     78 	}
     79 
     80 	if ((result = ensureKeyIsLoaded(hContext, hKey, &keySlot)))
     81 		goto done;
     82 
     83 	if ((result = tpm_rqu_build(TPM_ORD_TickStampBlob, &offset, txBlob, keySlot, antiReplay,
     84 				    digestToStamp, privAuth)))
     85 		return result;
     86 
     87 	if ((result = req_mgr_submit_req(txBlob)))
     88 		goto done;
     89 
     90 	if ((result = UnloadBlob_Header(txBlob, &paramSize))) {
     91 		LogDebugFn("UnloadBlob_Header failed: rc=0x%x", result);
     92 		goto done;
     93 	}
     94 
     95 	if (!result) {
     96 		result = tpm_rsp_parse(TPM_ORD_TickStampBlob, txBlob, paramSize, pulTickCountLength,
     97 				       prgbTickCount, pulSignatureLength, prgbSignature, privAuth);
     98 	}
     99 done:
    100 	return result;
    101 }
    102 
    103 void
    104 UnloadBlob_CURRENT_TICKS(UINT64 *offset, BYTE *b, TPM_CURRENT_TICKS *t)
    105 {
    106 	if (!t) {
    107 		UnloadBlob_UINT16(offset, NULL, b);
    108 		UnloadBlob_UINT64(offset, NULL, b);
    109 		UnloadBlob_UINT16(offset, NULL, b);
    110 		UnloadBlob(offset, sizeof(TPM_NONCE), b, NULL);
    111 
    112 		return;
    113 	}
    114 
    115 	UnloadBlob_UINT16(offset, &t->tag, b);
    116 	UnloadBlob_UINT64(offset, &t->currentTicks, b);
    117 	UnloadBlob_UINT16(offset, &t->tickRate, b);
    118 	UnloadBlob(offset, sizeof(TPM_NONCE), b, (BYTE *)&t->tickNonce);
    119 }
    120