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tpm: Change response length of tpm2_get_capability() 

For implementing the EFI_TCG2_PROTOCOL we need the count field returned by
the TPM when reading capabilities via tpm2_get_capability().

Adjust the implementation of the 'tpm2 get_capability' command accordingly.

Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Ilias Apalodimas 2020-11-05 23:58:43 +02:00 committed by Heinrich Schuchardt
parent b1aa6fcf27
commit a322f54f50
2 changed files with 4 additions and 4 deletions
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4
cmd/tpm-v2.c
View File

@ -191,10 +191,10 @@ static int do_tpm_get_capability(struct cmd_tbl *cmdtp, int flag, int argc,
for (i = 0; i < count; i++) {
printf("Property 0x");
for (j = 0; j < 4; j++)
printf("%02x", data[(i * 8) + j]);
printf("%02x", data[(i * 8) + j + sizeof(u32)]);
printf(": 0x");
for (j = 4; j < 8; j++)
printf("%02x", data[(i * 8) + j]);
printf("%02x", data[(i * 8) + j + sizeof(u32)]);
printf("\n");
}

4
lib/tpm-v2.c
View File

@ -184,10 +184,10 @@ u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
/*
* In the response buffer, the properties are located after the:
* tag (u16), response size (u32), response code (u32),
* YES/NO flag (u8), TPM_CAP (u32) and TPMU_CAPABILITIES (u32).
* YES/NO flag (u8), TPM_CAP (u32).
*/
properties_off = sizeof(u16) + sizeof(u32) + sizeof(u32) +
sizeof(u8) + sizeof(u32) + sizeof(u32);
sizeof(u8) + sizeof(u32);
memcpy(buf, &response[properties_off], response_len - properties_off);
return 0;