函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\integrity\evm\evm_main.c Create Date:2022-07-27 22:08:22
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：vm_verifyxattr - verify the integrity of the requested xattr*@dentry: object of the verify xattr*@xattr_name: requested xattr*@xattr_value: requested xattr value*@xattr_value_len: requested xattr value length* Calculate the HMAC for the given dentry and

函数原型：enum integrity_status evm_verifyxattr(struct dentry *dentry, const char *xattr_name, void *xattr_value, size_t xattr_value_len, struct integrity_iint_cache *iint)

返回类型：enum integrity_status

参数：

类型参数名称
struct dentry *dentry
const char *xattr_name
void *xattr_value
size_txattr_value_len
struct integrity_iint_cache *iint
271  如果非evm_key_loaded()或非evm_protected_xattr(xattr_name)则返回:INTEGRITY_UNKNOWN
274  如果非iint则
275  iint等于grity_iint_find - return the iint associated with an inode
276  如果非iint则返回:INTEGRITY_UNKNOWN
279  返回:vm_verify_hmac - calculate and compare the HMAC with the EVM xattr* Compute the HMAC on the dentry's protected set of extended attributes* and compare it against the stored security
调用者
名称描述
ima_appraise_measurementma_appraise_measurement - appraise file measurement* Call evm_verifyxattr() to verify the integrity of 'security.ima'.* Assuming success, compare the xattr hash with the collected measurement.* Return 0 on success, error code otherwise