diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_tpm.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/common/cmd_tpm.c b/common/cmd_tpm.c index 46fae18..c34000a 100644 --- a/common/cmd_tpm.c +++ b/common/cmd_tpm.c @@ -27,6 +27,13 @@ #include <asm/unaligned.h> #include <linux/string.h> +/* Useful constants */ +enum { + DIGEST_LENGTH = 20, + /* max lengths, valid for RSA keys <= 2048 bits */ + TPM_PUBKEY_MAX_LENGTH = 288, +}; + /** * Print a byte string in hexdecimal format, 16-bytes per line. * @@ -546,6 +553,72 @@ static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag, return convert_return_code(err); } +#ifdef CONFIG_TPM_AUTH_SESSIONS + +static int do_tpm_oiap(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + uint32_t auth_handle, err; + + err = tpm_oiap(&auth_handle); + + return convert_return_code(err); +} + +static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + uint32_t parent_handle, key_len, key_handle, err; + uint8_t usage_auth[DIGEST_LENGTH]; + void *key; + + if (argc < 5) + return CMD_RET_USAGE; + + parent_handle = simple_strtoul(argv[1], NULL, 0); + key = (void *)simple_strtoul(argv[2], NULL, 0); + key_len = simple_strtoul(argv[3], NULL, 0); + if (strlen(argv[4]) != 2 * DIGEST_LENGTH) + return CMD_RET_FAILURE; + parse_byte_string(argv[4], usage_auth, NULL); + + err = tpm_load_key2_oiap(parent_handle, key, key_len, usage_auth, + &key_handle); + if (!err) + printf("Key handle is 0x%x\n", key_handle); + + return convert_return_code(err); +} + +static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + uint32_t key_handle, err; + uint8_t usage_auth[DIGEST_LENGTH]; + uint8_t pub_key_buffer[TPM_PUBKEY_MAX_LENGTH]; + size_t pub_key_len = sizeof(pub_key_buffer); + + if (argc < 3) + return CMD_RET_USAGE; + + key_handle = simple_strtoul(argv[1], NULL, 0); + if (strlen(argv[2]) != 2 * DIGEST_LENGTH) + return CMD_RET_FAILURE; + parse_byte_string(argv[2], usage_auth, NULL); + + err = tpm_get_pub_key_oiap(key_handle, usage_auth, + pub_key_buffer, &pub_key_len); + if (!err) { + printf("dump of received pub key structure:\n"); + print_byte_string(pub_key_buffer, pub_key_len); + } + return convert_return_code(err); +} + +TPM_COMMAND_NO_ARG(tpm_end_oiap) + +#endif /* CONFIG_TPM_AUTH_SESSIONS */ + #define MAKE_TPM_CMD_ENTRY(cmd) \ U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "") @@ -590,6 +663,16 @@ static cmd_tbl_t tpm_commands[] = { do_tpm_nv_read, "", ""), U_BOOT_CMD_MKENT(nv_write, 0, 1, do_tpm_nv_write, "", ""), +#ifdef CONFIG_TPM_AUTH_SESSIONS + U_BOOT_CMD_MKENT(oiap, 0, 1, + do_tpm_oiap, "", ""), + U_BOOT_CMD_MKENT(end_oiap, 0, 1, + do_tpm_end_oiap, "", ""), + U_BOOT_CMD_MKENT(load_key2_oiap, 0, 1, + do_tpm_load_key2_oiap, "", ""), + U_BOOT_CMD_MKENT(get_pub_key_oiap, 0, 1, + do_tpm_get_pub_key_oiap, "", ""), +#endif /* CONFIG_TPM_AUTH_SESSIONS */ }; static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) @@ -638,6 +721,16 @@ 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_AUTH_SESSIONS +"Storage functions\n" +" loadkey2_oiap parent_handle key_addr key_len usage_auth\n" +" - loads a key data from memory address <key_addr>, <key_len> bytes\n" +" into TPM using the parent key <parent_handle> with authorization\n" +" <usage_auth> (20 bytes hex string).\n" +" get_pub_key_oiap key_handle usage_auth\n" +" - get the public key portion of a loaded key <key_handle> using\n" +" authorization <usage auth> (20 bytes hex string)\n" +#endif /* CONFIG_TPM_AUTH_SESSIONS */ "Endorsement Key Handling Commands:\n" " read_pubek addr count\n" " - Read <count> bytes of the public endorsement key to memory\n" @@ -648,6 +741,13 @@ U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm, " <digest_hex_string>\n" " pcr_read index addr count\n" " - Read <count> bytes from PCR <index> to memory address <addr>.\n" +#ifdef CONFIG_TPM_AUTH_SESSIONS +"Authorization Sessions\n" +" oiap\n" +" - setup an OIAP session\n" +" end_oiap\n" +" - terminates an active OIAP session\n" +#endif /* CONFIG_TPM_AUTH_SESSIONS */ "Non-volatile Storage Commands:\n" " nv_define_space index permission size\n" " - Establish a space at index <index> with <permission> of <size> bytes.\n" |