diff options
| author | Simon Glass <sjg@chromium.org> | 2021-02-06 14:23:41 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-03-02 15:53:37 -0500 |
| commit | 7785bc1d5f94d28497bef6935ecbaa1b0ddd3e26 (patch) | |
| tree | 27f83962679608c05adcb0ee964b6bf6f28c6177 /lib | |
| parent | 6719cbe31afef2cba4bc10b33350b38c4a51c3ac (diff) | |
tpm: Add TPM2 support for write_lock
Implement this API function for TPM2.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tpm-v2.c | 23 | ||||
| -rw-r--r-- | lib/tpm_api.c | 2 |
2 files changed, 24 insertions, 1 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); +} diff --git a/lib/tpm_api.c b/lib/tpm_api.c index 687fc8bc7e..4c662640a9 100644 --- a/lib/tpm_api.c +++ b/lib/tpm_api.c @@ -144,7 +144,7 @@ u32 tpm_write_lock(struct udevice *dev, u32 index) if (is_tpm1(dev)) return -ENOSYS; else if (is_tpm2(dev)) - return -ENOSYS; + return tpm2_write_lock(dev, index); else return -ENOSYS; } |