parse_efi_signature

函数名称：parse_efi_signature_list - Parse an EFI signature list for certificates*@source: The source of the key*@data: The data blob to parse*@size: The size of the data blob*@get_handler_for_guid: Get the handler func for the sig type (or NULL)

函数原型：int __init parse_efi_signature_list(const char *source, const void *data, size_t size, efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *))

返回类型：int

参数：

类型	参数	名称
const char *	source
const void *	data
size_t	size
efi_element_handler_t (*	get_handler_for_guid

如果size小于list的长度则返回:负EBADMSG

memcpy( & list, data, list的长度)

打印调试信息("LIST[%04x] guid=%pUl ls=%x hs=%x ss=%x\n", offs, b, signature_list_size, signature_header_size, signature_size)

lsize等于signature_list_size

hsize等于signature_header_size

esize等于signature_size

elsize等于lsize减list的长度减hsize

如果lsize大于size则

打印调试信息("<--%s() = -EBADMSG [overrun @%x]\n", __func__, offs)

返回:负EBADMSG

如果lsize小于list的长度或lsize减list的长度小于hsize或esize小于elem的长度或elsize小于esize或elsize取模esize不等于0则

打印调试信息("- bad size combo @%x\n", offs)

返回:负EBADMSG

handler等于get_handler_for_guid( & signature_type)

如果非handler则

data加等于lsize

size减等于lsize

offs加等于lsize

继续下一循环

data加等于list的长度加hsize

size减等于list的长度加hsize

offs加等于list的长度加hsize

以elsize大于0循环

elem等于data

打印调试信息("ELEM[%04x]\n", offs)

handler(source, & signature_data, esize - elem的长度)

101

data加等于esize

102

size减等于esize

103

offs加等于esize

**调用者**
名称	描述
load_uefi_certs	Load the certs contained in the UEFI databases into the platform trusted* keyring and the UEFI blacklisted X.509 cert SHA256 hashes into the blacklist* keyring.
load_powerpc_certs	Load the certs contained in the keys databases into the platform trusted* keyring and the blacklisted X.509 cert SHA256 hashes into the blacklist* keyring.

函数逻辑报告