evm_write

函数名称：vm_write_key - write() for <securityfs>/evm*@file: file pointer, not actually used*@buf: where to get the data from*@count: bytes sent*@ppos: where to start* Used to signal that key is on the kernel key ring

函数原型：static ssize_t evm_write_key(struct file *file, const char __user *buf, size_t count, loff_t *ppos)

返回类型：ssize_t

参数：

类型	参数	名称
struct file *	file
const char __user *	buf
size_t	count
loff_t *	ppos

如果非操作权限检查或evm_initialized按位与userland has signaled key load 则返回:负EPERM

ret等于kstrtoint_from_user(buf, count, 0, & i)

如果ret则返回:ret

如果非i或i按位与EVM_INIT_MASK的反的值不等于0则返回:负EINVAL

如果i按位与EVM_ALLOW_METADATA_WRITES且evm_initialized按位与EVM_KEY_MASK的值不等于0且非evm_initialized按位与EVM_ALLOW_METADATA_WRITES的值则返回:负EPERM

如果i按位与EVM_INIT_HMAC则

ret等于Get the key from the TPM for the SHA1-HMAC

如果ret不等于0则返回:ret

i或等于userland has signaled key load

101

evm_initialized或等于i

106

如果evm_initialized按位与EVM_INIT_HMAC则evm_initialized与等于EVM_ALLOW_METADATA_WRITES的反

109

返回:count

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告