diff options
| -rw-r--r-- | src/lib/tpm2_marshaling.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/lib/tpm2_marshaling.c b/src/lib/tpm2_marshaling.c index 0a90df0e96..63f0e4cd1d 100644 --- a/src/lib/tpm2_marshaling.c +++ b/src/lib/tpm2_marshaling.c @@ -357,18 +357,22 @@ int tpm_marshal_command(TPM_CC command, void *tpm_command_body, } if (body_size > 0) { + size_t marshaled_size; + size_t header_room = sizeof(struct tpm_header); /* See how much room was taken by marshaling. */ - body_size = max_body_size - body_size; + marshaled_size = max_body_size - body_size; - body_size += sizeof(struct tpm_header); + /* Total size includes the header size. */ + marshaled_size += sizeof(struct tpm_header); - marshal_u16(&buffer, tpm_tag, &max_body_size); - marshal_u32(&buffer, body_size, &max_body_size); - marshal_u32(&buffer, command, &max_body_size); + marshal_u16(&buffer, tpm_tag, &header_room); + marshal_u32(&buffer, marshaled_size, &header_room); + marshal_u32(&buffer, command, &header_room); + return marshaled_size; } - return body_size; + return -1; } static void unmarshal_get_capability(void **buffer, int *size, |