-
Notifications
You must be signed in to change notification settings - Fork 37
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
store: implemented tss2 scheme for loading FAPI keys
- Loading branch information
Showing
9 changed files
with
422 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,309 @@ | ||
| /* SPDX-License-Identifier: BSD-3-Clause */ | ||
|
|
||
| #include <string.h> | ||
|
|
||
| #include <openssl/core_dispatch.h> | ||
| #include <openssl/core_names.h> | ||
| #include <openssl/core_object.h> | ||
| #include <openssl/params.h> | ||
|
|
||
| #include <tss2/tss2_fapi.h> | ||
| #include <tss2/tss2_mu.h> | ||
| #include "tpm2-provider-pkey.h" | ||
|
|
||
| typedef struct tpm2_store_ctx_st TPM2_STORE_CTX; | ||
|
|
||
| struct tpm2_store_ctx_st { | ||
| const OSSL_CORE_HANDLE *core; | ||
| ESYS_CONTEXT *esys_ctx; | ||
| TPM2_CAPABILITY capability; | ||
| char *path; | ||
| FAPI_CONTEXT *fapi_ctx; | ||
| int load_done; | ||
| }; | ||
|
|
||
| static OSSL_FUNC_store_open_fn tpm2_store_open; | ||
| static OSSL_FUNC_store_settable_ctx_params_fn tpm2_store_settable_params; | ||
| static OSSL_FUNC_store_set_ctx_params_fn tpm2_store_set_params; | ||
| static OSSL_FUNC_store_load_fn tpm2_store_load; | ||
| static OSSL_FUNC_store_eof_fn tpm2_store_eof; | ||
| static OSSL_FUNC_store_close_fn tpm2_store_close; | ||
|
|
||
| static void * | ||
| tpm2_store_open(void *provctx, const char *uri) | ||
| { | ||
| TPM2_PROVIDER_CTX *cprov = provctx; | ||
| TPM2_STORE_CTX *sctx; | ||
| TSS2_RC r; | ||
|
|
||
| if (!uri || strncmp(uri, "tss2:", 5)) | ||
| return NULL; | ||
|
|
||
| DBG("STORE/TSS2 OPEN %s\n", uri+5); | ||
| if ((sctx = OPENSSL_zalloc(sizeof(TPM2_STORE_CTX))) == NULL) | ||
| return NULL; | ||
|
|
||
| sctx->core = cprov->core; | ||
| sctx->esys_ctx = cprov->esys_ctx; | ||
| sctx->capability = cprov->capability; | ||
|
|
||
| if (!(sctx->path = strdup(uri+5))) | ||
| goto error1; | ||
|
|
||
| r = Fapi_Initialize(&sctx->fapi_ctx, NULL); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto error2); | ||
|
|
||
| return sctx; | ||
| error2: | ||
| free(sctx->path); | ||
| error1: | ||
| OPENSSL_clear_free(sctx, sizeof(TPM2_STORE_CTX)); | ||
| return NULL; | ||
| } | ||
|
|
||
| static const OSSL_PARAM * | ||
| tpm2_store_settable_params(void *provctx) | ||
| { | ||
| static const OSSL_PARAM known_settable_ctx_params[] = { | ||
| OSSL_PARAM_END | ||
| }; | ||
| return known_settable_ctx_params; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_set_params(void *loaderctx, const OSSL_PARAM params[]) | ||
| { | ||
| TRACE_PARAMS("STORE/TSS2 SET_PARAMS", params); | ||
| return 1; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_load_pkey(TPM2_STORE_CTX *sctx, ESYS_TR object, | ||
| OSSL_CALLBACK *object_cb, void *object_cbarg) | ||
| { | ||
| TPM2B_PUBLIC *out_public = NULL; | ||
| TPM2_PKEY *pkey = NULL; | ||
| TSS2_RC r; | ||
| int ret = 0; | ||
|
|
||
| DBG("STORE/TSS2 LOAD pkey\n"); | ||
| pkey = OPENSSL_zalloc(sizeof(TPM2_PKEY)); | ||
| if (pkey == NULL) | ||
| return 0; | ||
|
|
||
| pkey->core = sctx->core; | ||
| pkey->esys_ctx = sctx->esys_ctx; | ||
| pkey->capability = sctx->capability; | ||
| pkey->object = object; | ||
|
|
||
| r = Esys_ReadPublic(sctx->esys_ctx, object, | ||
| ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, | ||
| &out_public, NULL, NULL); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto final); | ||
|
|
||
| pkey->data.pub = *out_public; | ||
| pkey->data.privatetype = KEY_TYPE_HANDLE; | ||
| Esys_TR_GetTpmHandle(sctx->esys_ctx, object, &pkey->data.handle); | ||
| pkey->data.emptyAuth = 1; | ||
|
|
||
| free(out_public); | ||
|
|
||
| OSSL_PARAM params[4]; | ||
| int object_type = OSSL_OBJECT_PKEY; | ||
| const char *keytype; | ||
|
|
||
| params[0] = OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); | ||
|
|
||
| if ((keytype = tpm2_openssl_type(&pkey->data)) == NULL) { | ||
| TPM2_ERROR_raise(sctx->core, TPM2_ERR_UNKNOWN_ALGORITHM); | ||
| goto final; | ||
| } | ||
| DBG("STORE/TSS2 LOAD found %s\n", keytype); | ||
| params[1] = OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE, | ||
| (char *)keytype, 0); | ||
| /* The address of the key becomes the octet string */ | ||
| params[2] = OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE, | ||
| &pkey, sizeof(pkey)); | ||
| params[3] = OSSL_PARAM_construct_end(); | ||
|
|
||
| ret = object_cb(params, object_cbarg); | ||
| final: | ||
| OPENSSL_clear_free(pkey, sizeof(TPM2_PKEY)); | ||
| return ret; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_load_index(TPM2_STORE_CTX *sctx, ESYS_TR object, | ||
| OSSL_CALLBACK *object_cb, void *object_cbarg) | ||
| { | ||
| TPM2B_NV_PUBLIC *metadata = NULL; | ||
| uint16_t read_len, read_max, data_len = 0; | ||
| unsigned char *data = NULL; | ||
| BIO *bufio; | ||
| TSS2_RC r; | ||
| int ret = 0; | ||
|
|
||
| r = Esys_NV_ReadPublic(sctx->esys_ctx, object, | ||
| ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, | ||
| &metadata, NULL); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto final); | ||
|
|
||
| read_len = metadata->nvPublic.dataSize; | ||
| read_max = tpm2_max_nvindex_buffer(sctx->capability.properties); | ||
| DBG("STORE/TSS2 LOAD index %u bytes (buffer %u bytes)\n", read_len, read_max); | ||
|
|
||
| if ((data = malloc(read_len)) == NULL) | ||
| goto final; | ||
|
|
||
| while (read_len > 0) { | ||
| uint16_t bytes_to_read = read_len < read_max ? read_len : read_max; | ||
| TPM2B_MAX_NV_BUFFER *buff = NULL; | ||
|
|
||
| r = Esys_NV_Read(sctx->esys_ctx, object, object, | ||
| ESYS_TR_PASSWORD, ESYS_TR_NONE, ESYS_TR_NONE, | ||
| bytes_to_read, data_len, &buff); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto final); | ||
|
|
||
| memcpy(data + data_len, buff->buffer, buff->size); | ||
| read_len -= buff->size; | ||
| data_len += buff->size; | ||
| free(buff); | ||
| } | ||
|
|
||
| OSSL_PARAM params[3]; | ||
| int object_type = OSSL_OBJECT_UNKNOWN; | ||
| char *pem_name = NULL; | ||
| char *pem_header = NULL; | ||
| unsigned char *der_data = NULL; | ||
| long der_len; | ||
|
|
||
| if ((bufio = BIO_new_mem_buf(data, data_len)) == NULL) | ||
| goto final; | ||
|
|
||
| /* the ossl_store_handle_load_result() supports DER objects only */ | ||
| if (PEM_read_bio(bufio, &pem_name, &pem_header, &der_data, &der_len) > 0) { | ||
| if (pem_name != NULL) { | ||
| DBG("STORE/TSS2 LOAD(PEM) %s %li bytes\n", pem_name, der_len); | ||
|
|
||
| if (!strcmp(pem_name, TSSPRIVKEY_PEM_STRING)) | ||
| object_type = OSSL_OBJECT_PKEY; | ||
| else if (!strcmp(pem_name, PEM_STRING_X509)) | ||
| object_type = OSSL_OBJECT_CERT; | ||
| else if (!strcmp(pem_name, PEM_STRING_X509_CRL)) | ||
| object_type = OSSL_OBJECT_CRL; | ||
| } | ||
|
|
||
| /* pass the data to ossl_store_handle_load_result(), | ||
| which will call the TPM2_PKEY decoder or read the certificate */ | ||
| params[0] = OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); | ||
|
|
||
| params[1] = OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_DATA, | ||
| der_data, der_len); | ||
| } else { | ||
| params[0] = OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); | ||
|
|
||
| params[1] = OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_DATA, | ||
| data, data_len); | ||
| } | ||
|
|
||
| params[2] = OSSL_PARAM_construct_end(); | ||
|
|
||
| ret = object_cb(params, object_cbarg); | ||
|
|
||
| OPENSSL_free(pem_name); | ||
| OPENSSL_free(pem_header); | ||
| OPENSSL_free(der_data); | ||
| BIO_free(bufio); | ||
| final: | ||
| free(data); | ||
| free(metadata); | ||
| return ret; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_load(void *ctx, | ||
| OSSL_CALLBACK *object_cb, void *object_cbarg, | ||
| OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) | ||
| { | ||
| TPM2_STORE_CTX *sctx = ctx; | ||
| uint8_t type; | ||
| uint8_t *data = NULL; | ||
| size_t length; | ||
| TPMS_CONTEXT blob; | ||
| ESYS_TR object; | ||
| TSS2_RC r; | ||
| int ret = 0; | ||
|
|
||
| DBG("STORE/TSS2 LOAD\n"); | ||
| r = Fapi_GetEsysBlob(sctx->fapi_ctx, sctx->path, &type, &data, &length); | ||
| sctx->load_done = 1; | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, return 0); | ||
|
|
||
| switch(type) { | ||
| case FAPI_ESYSBLOB_DESERIALIZE: | ||
| r = Esys_TR_Deserialize(sctx->esys_ctx, data, length, &object); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto error1); | ||
| break; | ||
| case FAPI_ESYSBLOB_CONTEXTLOAD: | ||
| r = Tss2_MU_TPMS_CONTEXT_Unmarshal(data, length, NULL, &blob); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto error1); | ||
|
|
||
| r = Esys_ContextLoad(sctx->esys_ctx, &blob, &object); | ||
| TPM2_CHECK_RC(sctx->core, r, TPM2_ERR_CANNOT_LOAD_KEY, goto error1); | ||
| break; | ||
| default: | ||
| TPM2_ERROR_raise(sctx->core, TPM2_ERR_CANNOT_LOAD_KEY); | ||
| goto error1; | ||
| } | ||
| Fapi_Free(data); | ||
|
|
||
| if (!strncmp(sctx->path, "/nv/", 4)) { | ||
| ret = tpm2_store_load_index(sctx, object, object_cb, object_cbarg); | ||
| Esys_TR_Close(sctx->esys_ctx, &object); | ||
| } else { | ||
| ret = tpm2_store_load_pkey(sctx, object, object_cb, object_cbarg); | ||
| if (!ret) | ||
| Esys_TR_Close(sctx->esys_ctx, &object); | ||
| } | ||
|
|
||
| return ret; | ||
| error2: | ||
| Esys_TR_Close(sctx->esys_ctx, &object); | ||
| error1: | ||
| Fapi_Free(data); | ||
| return 0; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_eof(void *ctx) | ||
| { | ||
| TPM2_STORE_CTX *sctx = ctx; | ||
| return sctx->load_done; | ||
| } | ||
|
|
||
| static int | ||
| tpm2_store_close(void *ctx) | ||
| { | ||
| TPM2_STORE_CTX *sctx = ctx; | ||
|
|
||
| if (sctx == NULL) | ||
| return 0; | ||
|
|
||
| DBG("STORE/TSS2 CLOSE\n"); | ||
| Fapi_Finalize(&sctx->fapi_ctx); | ||
| free(sctx->path); | ||
|
|
||
| OPENSSL_clear_free(ctx, sizeof(TPM2_STORE_CTX)); | ||
| return 1; | ||
| } | ||
|
|
||
| const OSSL_DISPATCH tpm2_tss2_store_functions[] = { | ||
| { OSSL_FUNC_STORE_OPEN, (void(*)(void))tpm2_store_open }, | ||
| { OSSL_FUNC_STORE_SETTABLE_CTX_PARAMS, (void(*)(void))tpm2_store_settable_params }, | ||
| { OSSL_FUNC_STORE_SET_CTX_PARAMS, (void(*)(void))tpm2_store_set_params }, | ||
| { OSSL_FUNC_STORE_LOAD, (void(*)(void))tpm2_store_load }, | ||
| { OSSL_FUNC_STORE_EOF, (void(*)(void))tpm2_store_eof }, | ||
| { OSSL_FUNC_STORE_CLOSE, (void(*)(void))tpm2_store_close }, | ||
| { 0, NULL } | ||
| }; | ||
|
|
Oops, something went wrong.