1 /* SPDX-License-Identifier: BSD-2-Clause */
2 /***********************************************************************;
3 * Copyright (c) 2015 - 2017, Intel Corporation
4 * All rights reserved.
5 ***********************************************************************/
6
7 #ifdef HAVE_CONFIG_H
8 #include <config.h>
9 #endif
10
11 #include "tss2_tpm2_types.h"
12 #include "tss2_mu.h"
13 #include "sysapi_util.h"
14
Tss2_Sys_GetRandom_Prepare(TSS2_SYS_CONTEXT * sysContext,UINT16 bytesRequested)15 TSS2_RC Tss2_Sys_GetRandom_Prepare(
16 TSS2_SYS_CONTEXT *sysContext,
17 UINT16 bytesRequested)
18 {
19 _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
20 TSS2_RC rval;
21
22 if (!ctx)
23 return TSS2_SYS_RC_BAD_REFERENCE;
24
25 rval = CommonPreparePrologue(ctx, TPM2_CC_GetRandom);
26 if (rval)
27 return rval;
28 rval = Tss2_MU_UINT16_Marshal(bytesRequested, ctx->cmdBuffer,
29 ctx->maxCmdSize,
30 &ctx->nextData);
31 if (rval)
32 return rval;
33
34 ctx->decryptAllowed = 0;
35 ctx->encryptAllowed = 1;
36 ctx->authAllowed = 1;
37
38 return CommonPrepareEpilogue(ctx);
39 }
40
Tss2_Sys_GetRandom_Complete(TSS2_SYS_CONTEXT * sysContext,TPM2B_DIGEST * randomBytes)41 TSS2_RC Tss2_Sys_GetRandom_Complete(
42 TSS2_SYS_CONTEXT *sysContext,
43 TPM2B_DIGEST *randomBytes)
44 {
45 _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
46 TSS2_RC rval;
47
48 if (!ctx)
49 return TSS2_SYS_RC_BAD_REFERENCE;
50
51 rval = CommonComplete(ctx);
52 if (rval)
53 return rval;
54
55 return Tss2_MU_TPM2B_DIGEST_Unmarshal(ctx->cmdBuffer,
56 ctx->maxCmdSize,
57 &ctx->nextData, randomBytes);
58 }
59
Tss2_Sys_GetRandom(TSS2_SYS_CONTEXT * sysContext,TSS2L_SYS_AUTH_COMMAND const * cmdAuthsArray,UINT16 bytesRequested,TPM2B_DIGEST * randomBytes,TSS2L_SYS_AUTH_RESPONSE * rspAuthsArray)60 TSS2_RC Tss2_Sys_GetRandom(
61 TSS2_SYS_CONTEXT *sysContext,
62 TSS2L_SYS_AUTH_COMMAND const *cmdAuthsArray,
63 UINT16 bytesRequested,
64 TPM2B_DIGEST *randomBytes,
65 TSS2L_SYS_AUTH_RESPONSE *rspAuthsArray)
66 {
67 _TSS2_SYS_CONTEXT_BLOB *ctx = syscontext_cast(sysContext);
68 TSS2_RC rval;
69
70 rval = Tss2_Sys_GetRandom_Prepare(sysContext, bytesRequested);
71 if (rval)
72 return rval;
73
74 rval = CommonOneCall(ctx, cmdAuthsArray, rspAuthsArray);
75 if (rval)
76 return rval;
77
78 return Tss2_Sys_GetRandom_Complete(sysContext, randomBytes);
79 }
80