+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
-#include <tpm.h>
+#include <tpm-v1.h>
#include <asm/state.h>
#include <asm/unaligned.h>
#include <linux/crc8.h>
/* TPM NVRAM location indices. */
#define FIRMWARE_NV_INDEX 0x1007
#define KERNEL_NV_INDEX 0x1008
+#define BACKUP_NV_INDEX 0x1009
+#define FWMP_NV_INDEX 0x100a
+#define REC_HASH_NV_INDEX 0x100b
+#define REC_HASH_NV_SIZE VB2_SHA256_DIGEST_SIZE
#define NV_DATA_PUBLIC_PERMISSIONS_OFFSET 60
NV_GLOBAL_LOCK,
NV_SEQ_FIRMWARE,
NV_SEQ_KERNEL,
+ NV_SEQ_BACKUP,
+ NV_SEQ_FWMP,
+ NV_SEQ_REC_HASH,
+
NV_SEQ_COUNT,
};
/* Size of each non-volatile space */
#define NV_DATA_SIZE 0x20
+struct nvdata_state {
+ bool present;
+ u8 data[NV_DATA_SIZE];
+};
+
/*
* Information about our TPM emulation. This is preserved in the sandbox
* state file if enabled.
*/
static struct tpm_state {
- uint8_t nvdata[NV_SEQ_COUNT][NV_DATA_SIZE];
+ bool valid;
+ struct nvdata_state nvdata[NV_SEQ_COUNT];
} g_state;
/**
sprintf(prop_name, "nvdata%d", i);
prop = fdt_getprop(blob, node, prop_name, &len);
- if (prop && len == NV_DATA_SIZE)
- memcpy(g_state.nvdata[i], prop, NV_DATA_SIZE);
+ if (prop && len == NV_DATA_SIZE) {
+ memcpy(g_state.nvdata[i].data, prop, NV_DATA_SIZE);
+ g_state.nvdata[i].present = true;
+ }
}
+ g_state.valid = true;
return 0;
}
for (i = 0; i < NV_SEQ_COUNT; i++) {
char prop_name[20];
- sprintf(prop_name, "nvdata%d", i);
- fdt_setprop(blob, node, prop_name, g_state.nvdata[i],
- NV_DATA_SIZE);
+ if (g_state.nvdata[i].present) {
+ sprintf(prop_name, "nvdata%d", i);
+ fdt_setprop(blob, node, prop_name,
+ g_state.nvdata[i].data, NV_DATA_SIZE);
+ }
}
return 0;
return NV_SEQ_FIRMWARE;
case KERNEL_NV_INDEX:
return NV_SEQ_KERNEL;
+ case BACKUP_NV_INDEX:
+ return NV_SEQ_BACKUP;
+ case FWMP_NV_INDEX:
+ return NV_SEQ_FWMP;
+ case REC_HASH_NV_INDEX:
+ return NV_SEQ_REC_HASH;
case 0:
return NV_GLOBAL_LOCK;
}
return -1;
}
+static void handle_cap_flag_space(u8 **datap, uint index)
+{
+ struct tpm_nv_data_public pub;
+
+ /* TPM_NV_PER_PPWRITE */
+ memset(&pub, '\0', sizeof(pub));
+ pub.nv_index = __cpu_to_be32(index);
+ pub.pcr_info_read.pcr_selection.size_of_select = __cpu_to_be16(
+ sizeof(pub.pcr_info_read.pcr_selection.pcr_select));
+ pub.permission.attributes = __cpu_to_be32(1);
+ pub.pcr_info_write = pub.pcr_info_read;
+ memcpy(*datap, &pub, sizeof(pub));
+ *datap += sizeof(pub);
+}
+
static int sandbox_tpm_xfer(struct udevice *dev, const uint8_t *sendbuf,
size_t send_size, uint8_t *recvbuf,
size_t *recv_len)
*recv_len, code);
print_buffer(0, sendbuf, 1, send_size, 0);
switch (code) {
- case 0x65: /* get flags */
+ case TPM_CMD_GET_CAPABILITY:
type = get_unaligned_be32(sendbuf + 14);
switch (type) {
- case 4:
+ case TPM_CAP_FLAG:
index = get_unaligned_be32(sendbuf + 18);
printf("Get flags index %#02x\n", index);
*recv_len = 22;
memset(recvbuf, '\0', *recv_len);
- put_unaligned_be32(22, recvbuf +
- TPM_RESPONSE_HEADER_LENGTH);
data = recvbuf + TPM_RESPONSE_HEADER_LENGTH +
sizeof(uint32_t);
switch (index) {
case FIRMWARE_NV_INDEX:
break;
case KERNEL_NV_INDEX:
- /* TPM_NV_PER_PPWRITE */
- put_unaligned_be32(1, data +
- NV_DATA_PUBLIC_PERMISSIONS_OFFSET);
+ handle_cap_flag_space(&data, index);
+ *recv_len = data - recvbuf -
+ TPM_RESPONSE_HEADER_LENGTH -
+ sizeof(uint32_t);
+ break;
+ case TPM_CAP_FLAG_PERMANENT: {
+ struct tpm_permanent_flags *pflags;
+
+ pflags = (struct tpm_permanent_flags *)data;
+ memset(pflags, '\0', sizeof(*pflags));
+ put_unaligned_be32(TPM_TAG_PERMANENT_FLAGS,
+ &pflags->tag);
+ *recv_len = TPM_HEADER_SIZE + 4 +
+ sizeof(*pflags);
break;
}
+ default:
+ printf(" ** Unknown flags index %x\n", index);
+ return -ENOSYS;
+ }
+ put_unaligned_be32(*recv_len,
+ recvbuf +
+ TPM_RESPONSE_HEADER_LENGTH);
break;
- case 0x11: /* TPM_CAP_NV_INDEX */
+ case TPM_CAP_NV_INDEX:
index = get_unaligned_be32(sendbuf + 18);
printf("Get cap nv index %#02x\n", index);
put_unaligned_be32(22, recvbuf +
default:
printf(" ** Unknown 0x65 command type %#02x\n",
type);
- return -1;
+ return -ENOSYS;
}
break;
- case 0xcd: /* nvwrite */
+ case TPM_CMD_NV_WRITE_VALUE:
index = get_unaligned_be32(sendbuf + 10);
length = get_unaligned_be32(sendbuf + 18);
seq = index_to_seq(index);
if (seq < 0)
- return -1;
+ return -EINVAL;
printf("tpm: nvwrite index=%#02x, len=%#02x\n", index, length);
- memcpy(&tpm->nvdata[seq], sendbuf + 22, length);
+ memcpy(&tpm->nvdata[seq].data, sendbuf + 22, length);
+ tpm->nvdata[seq].present = true;
*recv_len = 12;
memset(recvbuf, '\0', *recv_len);
break;
- case 0xcf: /* nvread */
+ case TPM_CMD_NV_READ_VALUE: /* nvread */
index = get_unaligned_be32(sendbuf + 10);
length = get_unaligned_be32(sendbuf + 18);
seq = index_to_seq(index);
if (seq < 0)
- return -1;
- printf("tpm: nvread index=%#02x, len=%#02x\n", index, length);
+ return -EINVAL;
+ printf("tpm: nvread index=%#02x, len=%#02x, seq=%#02x\n", index,
+ length, seq);
*recv_len = TPM_RESPONSE_HEADER_LENGTH + sizeof(uint32_t) +
length;
memset(recvbuf, '\0', *recv_len);
data = recvbuf + TPM_RESPONSE_HEADER_LENGTH +
sizeof(uint32_t);
+ memset(&rsk, 0, sizeof(struct rollback_space_kernel));
rsk.struct_version = 2;
rsk.uid = ROLLBACK_SPACE_KERNEL_UID;
- rsk.kernel_versions = 0;
rsk.crc8 = crc8(0, (unsigned char *)&rsk,
offsetof(struct rollback_space_kernel,
crc8));
memcpy(data, &rsk, sizeof(rsk));
+ } else if (!tpm->nvdata[seq].present) {
+ put_unaligned_be32(TPM_BADINDEX, recvbuf +
+ sizeof(uint16_t) + sizeof(uint32_t));
} else {
memcpy(recvbuf + TPM_RESPONSE_HEADER_LENGTH +
- sizeof(uint32_t), &tpm->nvdata[seq], length);
+ sizeof(uint32_t), &tpm->nvdata[seq].data,
+ length);
}
break;
- case 0x14: /* tpm extend */
+ case TPM_CMD_EXTEND:
+ *recv_len = 30;
+ memset(recvbuf, '\0', *recv_len);
+ break;
+ case TPM_CMD_NV_DEFINE_SPACE:
case 0x15: /* pcr read */
case 0x5d: /* force clear */
case 0x6f: /* physical enable */
case 0x72: /* physical set deactivated */
case 0x99: /* startup */
+ case 0x50: /* self test full */
case 0x4000000a: /* assert physical presence */
*recv_len = 12;
memset(recvbuf, '\0', *recv_len);
break;
default:
printf("Unknown tpm command %02x\n", code);
- return -1;
+ return -ENOSYS;
}
return 0;
projects / platform / kernel / u-boot.git / blobdiff