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tpm_emulator: Translate TPM error codes to strings

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Implement a function to translate TPM error codes to strings so that
at least the most common error codes can be translated to human
readable strings.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Stefan Berger 2019-07-24 23:36:56 -04:00
parent bcfd16fe26
commit 7e095e84ba
2 changed files with 63 additions and 10 deletions
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60
hw/tpm/tpm_emulator.c
View File

@ -82,6 +82,40 @@ typedef struct TPMEmulator {
TPMBlobBuffers state_blobs;
} TPMEmulator;
struct tpm_error {
uint32_t tpm_result;
const char *string;
};
static const struct tpm_error tpm_errors[] = {
/* TPM 1.2 error codes */
{ TPM_BAD_PARAMETER , "a parameter is bad" },
{ TPM_FAIL , "operation failed" },
{ TPM_KEYNOTFOUND , "key could not be found" },
{ TPM_BAD_PARAM_SIZE , "bad parameter size"},
{ TPM_ENCRYPT_ERROR , "encryption error" },
{ TPM_DECRYPT_ERROR , "decryption error" },
{ TPM_BAD_KEY_PROPERTY, "bad key property" },
{ TPM_BAD_MODE , "bad (encryption) mode" },
{ TPM_BAD_VERSION , "bad version identifier" },
{ TPM_BAD_LOCALITY , "bad locality" },
/* TPM 2 error codes */
{ TPM_RC_FAILURE , "operation failed" },
{ TPM_RC_LOCALITY , "bad locality" },
{ TPM_RC_INSUFFICIENT, "insufficient amount of data" },
};
static const char *tpm_emulator_strerror(uint32_t tpm_result)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(tpm_errors); i++) {
if (tpm_errors[i].tpm_result == tpm_result) {
return tpm_errors[i].string;
}
}
return "";
}
static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg,
size_t msg_len_in, size_t msg_len_out)
@ -264,7 +298,8 @@ static int tpm_emulator_stop_tpm(TPMBackend *tb)
res = be32_to_cpu(res);
if (res) {
error_report("tpm-emulator: TPM result for CMD_STOP: 0x%x", res);
error_report("tpm-emulator: TPM result for CMD_STOP: 0x%x %s", res,
tpm_emulator_strerror(res));
return -1;
}
@ -293,8 +328,9 @@ static int tpm_emulator_set_buffer_size(TPMBackend *tb,
psbs.u.resp.tpm_result = be32_to_cpu(psbs.u.resp.tpm_result);
if (psbs.u.resp.tpm_result != 0) {
error_report("tpm-emulator: TPM result for set buffer size : 0x%x",
psbs.u.resp.tpm_result);
error_report("tpm-emulator: TPM result for set buffer size : 0x%x %s",
psbs.u.resp.tpm_result,
tpm_emulator_strerror(psbs.u.resp.tpm_result));
return -1;
}
@ -339,7 +375,8 @@ static int tpm_emulator_startup_tpm_resume(TPMBackend *tb, size_t buffersize,
res = be32_to_cpu(init.u.resp.tpm_result);
if (res) {
error_report("tpm-emulator: TPM result for CMD_INIT: 0x%x", res);
error_report("tpm-emulator: TPM result for CMD_INIT: 0x%x %s", res,
tpm_emulator_strerror(res));
goto err_exit;
}
return 0;
@ -399,8 +436,9 @@ static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb,
res = be32_to_cpu(reset_est.u.resp.tpm_result);
if (res) {
error_report("tpm-emulator: TPM result for rest establixhed flag: 0x%x",
res);
error_report(
"tpm-emulator: TPM result for rest established flag: 0x%x %s",
res, tpm_emulator_strerror(res));
return -1;
}
@ -638,7 +676,8 @@ static int tpm_emulator_get_state_blob(TPMEmulator *tpm_emu,
res = be32_to_cpu(pgs.u.resp.tpm_result);
if (res != 0 && (res & 0x800) == 0) {
error_report("tpm-emulator: Getting the stateblob (type %d) failed "
"with a TPM error 0x%x", type, res);
"with a TPM error 0x%x %s", type, res,
tpm_emulator_strerror(res));
return -1;
}
@ -758,7 +797,8 @@ static int tpm_emulator_set_state_blob(TPMEmulator *tpm_emu,
tpm_result = be32_to_cpu(pss.u.resp.tpm_result);
if (tpm_result != 0) {
error_report("tpm-emulator: Setting the stateblob (type %d) failed "
"with a TPM error 0x%x", type, tpm_result);
"with a TPM error 0x%x %s", type, tpm_result,
tpm_emulator_strerror(tpm_result));
return -1;
}
@ -888,8 +928,8 @@ static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
error_report("tpm-emulator: Could not cleanly shutdown the TPM: %s",
strerror(errno));
} else if (res != 0) {
error_report("tpm-emulator: TPM result for sutdown: 0x%x",
be32_to_cpu(res));
error_report("tpm-emulator: TPM result for shutdown: 0x%x %s",
be32_to_cpu(res), tpm_emulator_strerror(be32_to_cpu(res)));
}
}

13
hw/tpm/tpm_int.h
View File

@ -39,7 +39,16 @@ struct tpm_resp_hdr {
#define TPM_TAG_RSP_AUTH1_COMMAND 0xc5
#define TPM_TAG_RSP_AUTH2_COMMAND 0xc6
#define TPM_BAD_PARAMETER 3
#define TPM_FAIL 9
#define TPM_KEYNOTFOUND 13
#define TPM_BAD_PARAM_SIZE 25
#define TPM_ENCRYPT_ERROR 32
#define TPM_DECRYPT_ERROR 33
#define TPM_BAD_KEY_PROPERTY 40
#define TPM_BAD_MODE 44
#define TPM_BAD_VERSION 46
#define TPM_BAD_LOCALITY 61
#define TPM_ORD_ContinueSelfTest 0x53
#define TPM_ORD_GetTicks 0xf1
@ -59,4 +68,8 @@ struct tpm_resp_hdr {
#define TPM2_PT_MAX_COMMAND_SIZE 0x11e
#define TPM_RC_INSUFFICIENT 0x9a
#define TPM_RC_FAILURE 0x101
#define TPM_RC_LOCALITY 0x907
#endif /* TPM_TPM_INT_H */