函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\keys\encrypted-keys\encrypted.c Create Date:2022-07-27 20:07:18
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：datablob_hmac_append

函数原型：static int datablob_hmac_append(struct encrypted_key_payload *epayload, const u8 *master_key, size_t master_keylen)

返回类型：int

参数：

类型参数名称
struct encrypted_key_payload *epayload
const u8 *master_key
size_tmaster_keylen
507  ret等于Derive authentication/encryption key from trusted key
508  如果ret小于0则转到:out
511  digest等于 datablob: format 加 length of datablob
512  ret等于calc_hmac(digest, derived_key, sizeofderived_key, datablob: format , length of datablob )
514  如果非ret则dump_hmac(NULL, digest, HASH_SIZE)
516  out :
517  memzero_explicit - Fill a region of memory (e
518  返回:ret
调用者
名称描述
encrypted_readrypted_read - format and copy the encrypted data to userspace* The resulting datablob format is:* * On success, return to userspace the encrypted key datablob size.