diff options
Diffstat (limited to 'lib/tpm-v2.c')
| -rw-r--r-- | lib/tpm-v2.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c index 9f1699131e..b796004930 100644 --- a/lib/tpm-v2.c +++ b/lib/tpm-v2.c @@ -601,3 +601,26 @@ u32 tpm2_get_random(struct udevice *dev, void *data, u32 count) return 0; } + +u32 tpm2_write_lock(struct udevice *dev, u32 index) +{ + u8 command_v2[COMMAND_BUFFER_SIZE] = { + /* header 10 bytes */ + tpm_u16(TPM2_ST_SESSIONS), /* TAG */ + tpm_u32(10 + 8 + 13), /* Length */ + tpm_u32(TPM2_CC_NV_WRITELOCK), /* Command code */ + + /* handles 8 bytes */ + tpm_u32(TPM2_RH_PLATFORM), /* Primary platform seed */ + tpm_u32(HR_NV_INDEX + index), /* Password authorisation */ + + /* session header 9 bytes */ + tpm_u32(9), /* Header size */ + tpm_u32(TPM2_RS_PW), /* Password authorisation */ + tpm_u16(0), /* nonce_size */ + 0, /* session_attrs */ + tpm_u16(0), /* auth_size */ + }; + + return tpm_sendrecv_command(dev, command_v2, NULL, NULL); +} |