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| /* certify.c | ||
| * | ||
| * Copyright (C) 2006-2024 wolfSSL Inc. | ||
| * | ||
| * This file is part of wolfTPM. | ||
| * | ||
| * wolfTPM is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * wolfTPM is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA | ||
| */ | ||
|
|
||
| /* This example shows how to create a attestation for a key (like IAK) | ||
| */ | ||
|
|
||
| #ifdef HAVE_CONFIG_H | ||
| #include <config.h> | ||
| #endif | ||
|
|
||
| #include <wolftpm/tpm2_wrap.h> | ||
|
|
||
| #include <stdio.h> | ||
|
|
||
| #if !defined(WOLFTPM2_NO_WRAPPER) && !defined(WOLFTPM2_NO_WOLFCRYPT) | ||
|
|
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| #include <examples/attestation/attestation.h> | ||
| #include <hal/tpm_io.h> | ||
| #include <examples/tpm_test.h> | ||
| #include <examples/tpm_test_keys.h> | ||
|
|
||
|
|
||
| /******************************************************************************/ | ||
| /* --- BEGIN TPM2.0 Certify example tool -- */ | ||
| /******************************************************************************/ | ||
|
|
||
| static void usage(void) | ||
| { | ||
| printf("Expected usage:\n"); | ||
| printf("./examples/attestation/certify [-eh] [-rsa/-ecc]\n"); | ||
| printf("* -ecc/-rsa: SRK is RSA or ECC (default is RSA)\n"); | ||
| printf("* -eh: Create keys under the Endorsement Hierarchy (EK) " | ||
| "(default is Owner)\n"); | ||
| } | ||
|
|
||
| int TPM2_Certify_Example(void* userCtx, int argc, char *argv[]) | ||
| { | ||
| int rc = -1; | ||
| int endorseKey = 0; | ||
| WOLFTPM2_DEV dev; | ||
| WOLFTPM2_KEY storage; | ||
| WOLFTPM2_KEYBLOB akKey; | ||
| WOLFTPM2_KEY devidKey; | ||
| WOLFTPM2_SESSION tpmSession; | ||
| TPM_ALG_ID alg = TPM_ALG_RSA; | ||
| TPMA_OBJECT objectAttributes; | ||
| TPMT_PUBLIC publicTemplate; | ||
| TPM_ALG_ID hashAlg = TPM_ALG_SHA256; | ||
| word32 digestSz = 0; | ||
| Certify_In certifyIn; | ||
| Certify_Out certifyOut; | ||
| const char keyCreationNonce[] = "RandomServerPickedCreationNonce"; | ||
|
|
||
| if (argc >= 2) { | ||
| if (XSTRCMP(argv[1], "-?") == 0 || | ||
| XSTRCMP(argv[1], "-h") == 0 || | ||
| XSTRCMP(argv[1], "--help") == 0) { | ||
| usage(); | ||
| return 0; | ||
| } | ||
| } | ||
| while (argc > 1) { | ||
| if (XSTRCMP(argv[argc-1], "-ecc") == 0) { | ||
| alg = TPM_ALG_ECC; | ||
| } | ||
| else if (XSTRCMP(argv[argc-1], "-rsa") == 0) { | ||
| alg = TPM_ALG_RSA; | ||
| } | ||
| else if (XSTRCMP(argv[argc-1], "-eh") == 0) { | ||
| endorseKey = 1; | ||
| } | ||
| else { | ||
| printf("Warning: Unrecognized option: %s\n", argv[argc-1]); | ||
| } | ||
| argc--; | ||
| } | ||
|
|
||
| (void)endorseKey; /* TODO: Add endorsement */ | ||
|
|
||
| XMEMSET(&storage, 0, sizeof(storage)); | ||
| XMEMSET(&akKey, 0, sizeof(akKey)); | ||
| XMEMSET(&devidKey, 0, sizeof(devidKey)); | ||
| XMEMSET(&tpmSession, 0, sizeof(tpmSession)); | ||
|
|
||
| printf("Certify IDevID with IAK to generate TPM-signed attestation info\n"); | ||
| rc = wolfTPM2_Init(&dev, TPM2_IoCb, userCtx); | ||
| if (rc != TPM_RC_SUCCESS) { | ||
| printf("wolfTPM2_Init failed 0x%x: %s\n", rc, TPM2_GetRCString(rc)); | ||
| goto exit; | ||
| } | ||
| printf("wolfTPM2_Init: success\n"); | ||
|
|
||
| /* Get SRK */ | ||
| rc = getPrimaryStoragekey(&dev, &storage, alg); | ||
| if (rc != 0) goto exit; | ||
|
|
||
| /* Create an IAK */ | ||
| objectAttributes = ( | ||
| TPMA_OBJECT_sensitiveDataOrigin | TPMA_OBJECT_noDA | | ||
| TPMA_OBJECT_userWithAuth | TPMA_OBJECT_adminWithPolicy | | ||
| TPMA_OBJECT_decrypt | TPMA_OBJECT_sign); | ||
| XMEMSET(&publicTemplate, 0, sizeof(publicTemplate)); | ||
| if (alg == TPM_ALG_RSA) { | ||
| rc = GetKeyTemplateRSA(&publicTemplate, TPM_ALG_SHA256, | ||
| objectAttributes, 2048, 0, TPM_ALG_NULL, TPM_ALG_NULL); | ||
| } | ||
| else { /* TPM_ALG_ECC */ | ||
| rc = GetKeyTemplateECC(&publicTemplate, TPM_ALG_SHA256, | ||
| objectAttributes, TPM_ECC_NIST_P256, TPM_ALG_NULL, TPM_ALG_NULL); | ||
| } | ||
| if (rc == 0) { | ||
| word32 val; | ||
|
|
||
| /* Setup admin policy */ | ||
| publicTemplate.objectAttributes |= TPMA_OBJECT_adminWithPolicy; | ||
|
|
||
| XMEMSET(publicTemplate.authPolicy.buffer, 0, | ||
| sizeof(publicTemplate.authPolicy.buffer)); | ||
| digestSz = TPM2_GetHashDigestSize(hashAlg); | ||
|
|
||
| val = TPM_CC_Certify; | ||
| #ifndef BIG_ENDIAN_ORDER | ||
| val = ByteReverseWord32(val); | ||
| #endif | ||
| rc = wolfTPM2_PolicyHash1(hashAlg, publicTemplate.authPolicy.buffer, | ||
| &digestSz, TPM_CC_PolicyCommandCode, (byte*)&val, sizeof(val)); | ||
| TPM2_PrintBin(publicTemplate.authPolicy.buffer, digestSz); | ||
| } | ||
| if (rc == 0) { | ||
| publicTemplate.authPolicy.size = (UINT16)digestSz; | ||
| rc = wolfTPM2_CreateKey(&dev, &akKey, &storage.handle, &publicTemplate, | ||
| (const byte*)gAiKeyAuth, sizeof(gAiKeyAuth)-1); | ||
| } | ||
| if (rc == 0) { | ||
| wolfTPM2_LoadKey(&dev, &akKey, &storage.handle); | ||
| } | ||
| if (rc != 0) { | ||
| printf("Failed to create IAK!\n"); | ||
| goto exit; | ||
| } | ||
| printf("IAK Created and Loaded: 0x%x (%d bytes)\n", | ||
| (word32)akKey.handle.hndl, akKey.pub.size); | ||
|
|
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| /* Start a policy session for admin policy authentication */ | ||
| rc = wolfTPM2_StartSession(&dev, &tpmSession, NULL, NULL, | ||
| TPM_SE_POLICY, TPM_ALG_NULL); | ||
| if (rc == 0) { | ||
| printf("TPM2_StartAuthSession: sessionHandle 0x%x\n", | ||
| (word32)tpmSession.handle.hndl); | ||
|
|
||
| /* set session for authorization of the storage key */ | ||
| rc = wolfTPM2_SetAuthSession(&dev, 0, &tpmSession, | ||
| TPMA_SESSION_continueSession); | ||
| } | ||
| if (rc != 0) { | ||
| printf("Failed to start policy session!\n"); | ||
| goto exit; | ||
| } | ||
|
|
||
| /* Perform admin policy authorizations */ | ||
| rc = wolfTPM2_PolicyCommandCode(&dev, &tpmSession, TPM_CC_Certify); | ||
| if (rc != 0) { | ||
| goto exit; | ||
| } | ||
|
|
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| wolfTPM2_SetAuthHandle(&dev, 1, &akKey.handle); | ||
|
|
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| /* Create signed certify structure */ | ||
| XMEMSET(&certifyIn, 0, sizeof(certifyIn)); | ||
| certifyIn.objectHandle = storage.handle.hndl; | ||
| certifyIn.signHandle = akKey.handle.hndl; | ||
| certifyIn.inScheme.scheme = TPM_ALG_RSASSA; | ||
| certifyIn.inScheme.details.any.hashAlg = TPM_ALG_SHA256; | ||
| /* provide a random nonce from remote server (optional) */ | ||
| certifyIn.qualifyingData.size = sizeof(keyCreationNonce)-1; | ||
| XMEMCPY(certifyIn.qualifyingData.buffer, keyCreationNonce, | ||
| certifyIn.qualifyingData.size); | ||
| rc = TPM2_Certify(&certifyIn, &certifyOut); | ||
| if (rc != TPM_RC_SUCCESS) { | ||
| printf("TPM2_Certify RSA key failed 0x%x: %s\n", rc, | ||
| TPM2_GetRCString(rc)); | ||
| goto exit; | ||
| } | ||
| else { | ||
| printf("TPM2_Certify test passed\n"); | ||
| } | ||
|
|
||
| exit: | ||
|
|
||
| if (rc != 0) { | ||
| printf("\nFailure 0x%x: %s\n\n", rc, wolfTPM2_GetRCString(rc)); | ||
| } | ||
|
|
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| wolfTPM2_UnloadHandle(&dev, &storage.handle); | ||
| wolfTPM2_UnloadHandle(&dev, &akKey.handle); | ||
| wolfTPM2_UnloadHandle(&dev, &tpmSession.handle); | ||
| wolfTPM2_Cleanup(&dev); | ||
|
|
||
| return rc; | ||
| } | ||
|
|
||
| /******************************************************************************/ | ||
| /* --- END TPM2.0 Certify example tool -- */ | ||
| /******************************************************************************/ | ||
| #endif /* !WOLFTPM2_NO_WRAPPER && !WOLFTPM2_NO_WOLFCRYPT */ | ||
|
|
||
| #ifndef NO_MAIN_DRIVER | ||
| int main(int argc, char *argv[]) | ||
| { | ||
| int rc = -1; | ||
|
|
||
| #if !defined(WOLFTPM2_NO_WRAPPER) && !defined(WOLFTPM2_NO_WOLFCRYPT) | ||
| rc = TPM2_Certify_Example(NULL, argc, argv); | ||
| #else | ||
| printf("Wrapper or wolfCrypt code not compiled in\n"); | ||
| (void)argc; | ||
| (void)argv; | ||
| #endif /* !WOLFTPM2_NO_WRAPPER && !WOLFTPM2_NO_WOLFCRYPT */ | ||
|
|
||
| return rc; | ||
| } | ||
| #endif |
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