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110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
#ifndef libhis_changeownership_hpp
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#define libhis_changeownership_hpp
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#ifdef WINDOWS
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#include "tspi.h"
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#include "tss_error.h"
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#include "tss_defines.h"
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#endif
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#ifdef LINUX
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#include <tss/tspi.h>
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#include <tss/tss_error.h>
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#include <tss/tss_defines.h>
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#endif
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#include "libhis_exception.hpp"
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class libhis_changeownership
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{
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public:
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libhis_changeownership()
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{
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//create a context object
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result = Tspi_Context_Create(&hcontext);
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if(result != TSS_SUCCESS) throw libhis_exception("Create Conntext", result);
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//Create TPM policy
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result = Tspi_Context_CreateObject(hcontext, TSS_OBJECT_TYPE_POLICY, TSS_POLICY_USAGE, &hpolicy_tpm);
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if(result != TSS_SUCCESS) throw libhis_exception("Create TPM Policy", result);
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//Create new policy
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result = Tspi_Context_CreateObject(hcontext, TSS_OBJECT_TYPE_POLICY, TSS_POLICY_USAGE, &hpolicy_new);
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if(result != TSS_SUCCESS) throw libhis_exception("Create New Policy", result);
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}
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void changeownership(
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unsigned char *auth_tpm_value,
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unsigned long auth_tpm_size,
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bool auth_tpm_sha1,
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unsigned char *auth_new_value,
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unsigned long auth_new_size,
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bool auth_new_sha1)
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{
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//establish a session
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result = Tspi_Context_Connect(hcontext, 0);
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if(result != TSS_SUCCESS) throw libhis_exception("Connect Context", result);
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//get the TPM object
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result = Tspi_Context_GetTpmObject(hcontext, &htpm);
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if(result != TSS_SUCCESS) throw libhis_exception("Get TPM Object", result);
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//set up TPM auth
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if(auth_tpm_sha1)
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{
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result = Tspi_Policy_SetSecret(hpolicy_tpm, TSS_SECRET_MODE_SHA1, auth_tpm_size, auth_tpm_value);
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if(result != TSS_SUCCESS) throw libhis_exception("Set TPM Secret SHA1", result);
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}
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else
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{
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result = Tspi_Policy_SetSecret(hpolicy_tpm, TSS_SECRET_MODE_PLAIN, auth_tpm_size, auth_tpm_value);
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if(result != TSS_SUCCESS) throw libhis_exception("Set TPM Secret Plain", result);
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}
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//assign the TPM auth
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result = Tspi_Policy_AssignToObject(hpolicy_tpm, htpm);
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if(result != TSS_SUCCESS) throw libhis_exception("Assign TPM Secret", result);
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//set up new auth
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if(auth_new_sha1)
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{
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result = Tspi_Policy_SetSecret(hpolicy_new, TSS_SECRET_MODE_SHA1, auth_new_size, auth_new_value);
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if(result != TSS_SUCCESS) throw libhis_exception("Set New Secret SHA1", result);
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}
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else
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{
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result = Tspi_Policy_SetSecret(hpolicy_new, TSS_SECRET_MODE_PLAIN, auth_new_size, auth_new_value);
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if(result != TSS_SUCCESS) throw libhis_exception("Set New Secret Plain", result);
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}
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//change the TPM secret
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result = Tspi_ChangeAuth(htpm, 0, hpolicy_new);
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if(result != TSS_SUCCESS) throw libhis_exception("Change TPM Secret", result);
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return;
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}
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~libhis_changeownership()
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{
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//clean up new policy
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result = Tspi_Context_CloseObject(hcontext, hpolicy_new);
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if(result != TSS_SUCCESS) throw libhis_exception("Close New Policy", result);
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//clean up TPM policy
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result = Tspi_Context_CloseObject(hcontext, hpolicy_tpm);
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if(result != TSS_SUCCESS) throw libhis_exception("Close TPM Policy", result);
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//close context
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result = Tspi_Context_Close(hcontext);
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if(result != TSS_SUCCESS) throw libhis_exception("Close Context", result);
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}
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private:
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TSS_RESULT result;
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TSS_HCONTEXT hcontext;
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TSS_HTPM htpm;
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TSS_HPOLICY hpolicy_tpm,
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hpolicy_new;
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};
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#endif
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