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-rw-r--r--cmd/tpm.c76
-rw-r--r--drivers/tpm/Kconfig7
2 files changed, 82 insertions, 1 deletions
diff --git a/cmd/tpm.c b/cmd/tpm.c
index e3d26b7..0c4bc73 100644
--- a/cmd/tpm.c
+++ b/cmd/tpm.c
@@ -752,6 +752,68 @@ static int do_tpm_flush(cmd_tbl_t *cmdtp, int flag, int argc,
}
#endif /* CONFIG_TPM_FLUSH_RESOURCES */
+#ifdef CONFIG_TPM_LIST_RESOURCES
+static int do_tpm_list(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ int type = 0;
+ uint16_t res_count;
+ uint8_t buf[288];
+ uint8_t *ptr;
+ int err;
+ uint i;
+
+ if (argc != 2)
+ return CMD_RET_USAGE;
+
+ if (!strcasecmp(argv[1], "key"))
+ type = TPM_RT_KEY;
+ else if (!strcasecmp(argv[1], "auth"))
+ type = TPM_RT_AUTH;
+ else if (!strcasecmp(argv[1], "hash"))
+ type = TPM_RT_HASH;
+ else if (!strcasecmp(argv[1], "trans"))
+ type = TPM_RT_TRANS;
+ else if (!strcasecmp(argv[1], "context"))
+ type = TPM_RT_CONTEXT;
+ else if (!strcasecmp(argv[1], "counter"))
+ type = TPM_RT_COUNTER;
+ else if (!strcasecmp(argv[1], "delegate"))
+ type = TPM_RT_DELEGATE;
+ else if (!strcasecmp(argv[1], "daa_tpm"))
+ type = TPM_RT_DAA_TPM;
+ else if (!strcasecmp(argv[1], "daa_v0"))
+ type = TPM_RT_DAA_V0;
+ else if (!strcasecmp(argv[1], "daa_v1"))
+ type = TPM_RT_DAA_V1;
+
+ if (!type) {
+ printf("Resource type %s unknown.\n", argv[1]);
+ return -1;
+ }
+
+ /* fetch list of already loaded resources in the TPM */
+ err = tpm_get_capability(TPM_CAP_HANDLE, type, buf,
+ sizeof(buf));
+ if (err) {
+ printf("tpm_get_capability returned error %d.\n", err);
+ return -1;
+ }
+ res_count = get_unaligned_be16(buf);
+ ptr = buf + 2;
+
+ printf("Resources of type %s (%02x):\n", argv[1], type);
+ if (!res_count) {
+ puts("None\n");
+ } else {
+ for (i = 0; i < res_count; ++i, ptr += 4)
+ printf("Index %d: %08x\n", i, get_unaligned_be32(ptr));
+ }
+
+ return 0;
+}
+#endif /* CONFIG_TPM_LIST_RESOURCES */
+
#define MAKE_TPM_CMD_ENTRY(cmd) \
U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "")
@@ -815,6 +877,10 @@ static cmd_tbl_t tpm_commands[] = {
U_BOOT_CMD_MKENT(flush, 0, 1,
do_tpm_flush, "", ""),
#endif /* CONFIG_TPM_FLUSH_RESOURCES */
+#ifdef CONFIG_TPM_LIST_RESOURCES
+ U_BOOT_CMD_MKENT(list, 0, 1,
+ do_tpm_list, "", ""),
+#endif /* CONFIG_TPM_LIST_RESOURCES */
};
static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
@@ -864,14 +930,22 @@ U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm,
" get_capability cap_area sub_cap addr count\n"
" - Read <count> bytes of TPM capability indexed by <cap_area> and\n"
" <sub_cap> to memory address <addr>.\n"
-#ifdef CONFIG_TPM_FLUSH_RESOURCES
+#if defined(CONFIG_TPM_FLUSH_RESOURCES) || defined(CONFIG_TPM_LIST_RESOURCES)
"Resource management functions\n"
+#endif
+#ifdef CONFIG_TPM_FLUSH_RESOURCES
" flush resource_type id\n"
" - flushes a resource of type <resource_type> (may be one of key, auth,\n"
" hash, trans, context, counter, delegate, daa_tpm, daa_v0, daa_v1),\n"
" and id <id> from the TPM. Use an <id> of \"all\" to flush all\n"
" resources of that type.\n"
#endif /* CONFIG_TPM_FLUSH_RESOURCES */
+#ifdef CONFIG_TPM_LIST_RESOURCES
+" list resource_type\n"
+" - lists resources of type <resource_type> (may be one of key, auth,\n"
+" hash, trans, context, counter, delegate, daa_tpm, daa_v0, daa_v1),\n"
+" contained in the TPM.\n"
+#endif /* CONFIG_TPM_LIST_RESOURCES */
#ifdef CONFIG_TPM_AUTH_SESSIONS
"Storage functions\n"
" loadkey2_oiap parent_handle key_addr key_len usage_auth\n"
diff --git a/drivers/tpm/Kconfig b/drivers/tpm/Kconfig
index a54b6a9..2a64bc4 100644
--- a/drivers/tpm/Kconfig
+++ b/drivers/tpm/Kconfig
@@ -96,4 +96,11 @@ config TPM_LOAD_KEY_BY_SHA1
Enable support to load keys into the TPM by identifying
their parent via the public key's SHA1 hash.
The functionality is available via the 'tpm' command as well.
+
+config TPM_LIST_RESOURCES
+ bool "Enable TPM resource listing support"
+ depends on TPM
+ help
+ Enable support to list specific resources (e.g. keys) within the TPM.
+ The functionality is available via the 'tpm' command as well.
endmenu