ba9d087b8f
as serialization runtime buffer to reduce SMRAM consumption for SMM variable driver. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Guo Dong <guo.dong@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17059 6f19259b-4bc3-4df7-8a09-765794883524
356 lines
14 KiB
C
356 lines
14 KiB
C
/** @file
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The internal header file includes the common header files, defines
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internal structure and functions used by AuthService module.
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Caution: This module requires additional review when modified.
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This driver will have external input - variable data. It may be input in SMM mode.
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This external input must be validated carefully to avoid security issue like
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buffer overflow, integer overflow.
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Variable attribute should also be checked to avoid authentication bypass.
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The whole SMM authentication variable design relies on the integrity of flash part and SMM.
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which is assumed to be protected by platform. All variable code and metadata in flash/SMM Memory
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may not be modified without authorization. If platform fails to protect these resources,
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the authentication service provided in this driver will be broken, and the behavior is undefined.
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Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _AUTHSERVICE_H_
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#define _AUTHSERVICE_H_
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#define EFI_CERT_TYPE_RSA2048_SHA256_SIZE 256
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#define EFI_CERT_TYPE_RSA2048_SIZE 256
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///
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/// Size of AuthInfo prior to the data payload.
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///
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#define AUTHINFO_SIZE ((OFFSET_OF (EFI_VARIABLE_AUTHENTICATION, AuthInfo)) + \
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(OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData)) + \
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sizeof (EFI_CERT_BLOCK_RSA_2048_SHA256))
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#define AUTHINFO2_SIZE(VarAuth2) ((OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2, AuthInfo)) + \
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(UINTN) ((EFI_VARIABLE_AUTHENTICATION_2 *) (VarAuth2))->AuthInfo.Hdr.dwLength)
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#define OFFSET_OF_AUTHINFO2_CERT_DATA ((OFFSET_OF (EFI_VARIABLE_AUTHENTICATION_2, AuthInfo)) + \
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(OFFSET_OF (WIN_CERTIFICATE_UEFI_GUID, CertData)))
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///
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/// "AuthVarKeyDatabase" variable for the Public Key store.
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///
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#define AUTHVAR_KEYDB_NAME L"AuthVarKeyDatabase"
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///
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/// "certdb" variable stores the signer's certificates for non PK/KEK/DB/DBX
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/// variables with EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS set.
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///
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///
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#define EFI_CERT_DB_NAME L"certdb"
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///
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/// Struct to record signature requirement defined by UEFI spec.
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/// For SigHeaderSize and SigDataSize, ((UINT32) ~0) means NO exact length requirement for this field.
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///
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typedef struct {
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EFI_GUID SigType;
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// Expected SignatureHeader size in Bytes.
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UINT32 SigHeaderSize;
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// Expected SignatureData size in Bytes.
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UINT32 SigDataSize;
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} EFI_SIGNATURE_ITEM;
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typedef enum {
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AuthVarTypePk,
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AuthVarTypeKek,
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AuthVarTypePriv,
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AuthVarTypePayload
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} AUTHVAR_TYPE;
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#pragma pack(1)
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typedef struct {
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EFI_GUID VendorGuid;
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UINT32 CertNodeSize;
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UINT32 NameSize;
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UINT32 CertDataSize;
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/// CHAR16 VariableName[NameSize];
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/// UINT8 CertData[CertDataSize];
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} AUTH_CERT_DB_DATA;
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#pragma pack()
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/**
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Process variable with EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS/EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS set.
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Caution: This function may receive untrusted input.
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This function may be invoked in SMM mode, and datasize and data are external input.
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This function will do basic validation, before parse the data.
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This function will parse the authentication carefully to avoid security issues, like
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buffer overflow, integer overflow.
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This function will check attribute carefully to avoid authentication bypass.
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@param[in] VariableName Name of Variable to be found.
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@param[in] VendorGuid Variable vendor GUID.
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@param[in] Data Data pointer.
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@param[in] DataSize Size of Data found. If size is less than the
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data, this value contains the required size.
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@param[in] Variable The variable information which is used to keep track of variable usage.
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@param[in] Attributes Attribute value of the variable.
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@return EFI_INVALID_PARAMETER Invalid parameter
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@return EFI_WRITE_PROTECTED Variable is write-protected and needs authentication with
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EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS set.
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@return EFI_SECURITY_VIOLATION The variable is with EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
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set, but the AuthInfo does NOT pass the validation
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check carried out by the firmware.
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@return EFI_SUCCESS Variable is not write-protected, or passed validation successfully.
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**/
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EFI_STATUS
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ProcessVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN VOID *Data,
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IN UINTN DataSize,
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IN VARIABLE_POINTER_TRACK *Variable,
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IN UINT32 Attributes
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);
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/**
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Update platform mode.
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@param[in] Mode SETUP_MODE or USER_MODE.
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@return EFI_INVALID_PARAMETER Invalid parameter.
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@return EFI_SUCCESS Update platform mode successfully.
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**/
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EFI_STATUS
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UpdatePlatformMode (
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IN UINT32 Mode
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);
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/**
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Initializes for authenticated varibale service.
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@retval EFI_SUCCESS Function successfully executed.
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@retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
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**/
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EFI_STATUS
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AutenticatedVariableServiceInitialize (
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VOID
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);
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/**
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Initializes for cryptlib service before use, include register algrithm and allocate scratch.
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**/
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VOID
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CryptLibraryInitialize (
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VOID
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);
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/**
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Check input data form to make sure it is a valid EFI_SIGNATURE_LIST for PK/KEK variable.
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@param[in] VariableName Name of Variable to be check.
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@param[in] VendorGuid Variable vendor GUID.
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@param[in] Data Point to the variable data to be checked.
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@param[in] DataSize Size of Data.
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@return EFI_INVALID_PARAMETER Invalid signature list format.
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@return EFI_SUCCESS Passed signature list format check successfully.
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**/
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EFI_STATUS
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CheckSignatureListFormat(
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN VOID *Data,
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IN UINTN DataSize
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);
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/**
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Process variable with platform key for verification.
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Caution: This function may receive untrusted input.
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This function may be invoked in SMM mode, and datasize and data are external input.
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This function will do basic validation, before parse the data.
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This function will parse the authentication carefully to avoid security issues, like
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buffer overflow, integer overflow.
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This function will check attribute carefully to avoid authentication bypass.
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@param[in] VariableName Name of Variable to be found.
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@param[in] VendorGuid Variable vendor GUID.
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@param[in] Data Data pointer.
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@param[in] DataSize Size of Data found. If size is less than the
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data, this value contains the required size.
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@param[in] Variable The variable information which is used to keep track of variable usage.
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@param[in] Attributes Attribute value of the variable.
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@param[in] IsPk Indicate whether it is to process pk.
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@return EFI_INVALID_PARAMETER Invalid parameter
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@return EFI_SECURITY_VIOLATION The variable does NOT pass the validation
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check carried out by the firmware.
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@return EFI_SUCCESS Variable passed validation successfully.
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**/
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EFI_STATUS
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ProcessVarWithPk (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN VOID *Data,
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IN UINTN DataSize,
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IN VARIABLE_POINTER_TRACK *Variable,
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IN UINT32 Attributes OPTIONAL,
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IN BOOLEAN IsPk
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);
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/**
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Process variable with key exchange key for verification.
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Caution: This function may receive untrusted input.
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This function may be invoked in SMM mode, and datasize and data are external input.
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This function will do basic validation, before parse the data.
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This function will parse the authentication carefully to avoid security issues, like
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buffer overflow, integer overflow.
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This function will check attribute carefully to avoid authentication bypass.
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@param[in] VariableName Name of Variable to be found.
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@param[in] VendorGuid Variable vendor GUID.
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@param[in] Data Data pointer.
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@param[in] DataSize Size of Data found. If size is less than the
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data, this value contains the required size.
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@param[in] Variable The variable information that is used to keep track of variable usage.
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@param[in] Attributes Attribute value of the variable.
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@return EFI_INVALID_PARAMETER Invalid parameter.
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@return EFI_SECURITY_VIOLATION The variable does NOT pass the validation
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check carried out by the firmware.
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@return EFI_SUCCESS Variable passed validation successfully.
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**/
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EFI_STATUS
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ProcessVarWithKek (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN VOID *Data,
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IN UINTN DataSize,
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IN VARIABLE_POINTER_TRACK *Variable,
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IN UINT32 Attributes OPTIONAL
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);
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/**
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Merge two buffers which formatted as EFI_SIGNATURE_LIST. Only the new EFI_SIGNATURE_DATA
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will be appended to the original EFI_SIGNATURE_LIST, duplicate EFI_SIGNATURE_DATA
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will be ignored.
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@param[in, out] Data Pointer to original EFI_SIGNATURE_LIST.
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@param[in] DataSize Size of Data buffer.
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@param[in] FreeBufSize Size of free data buffer
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@param[in] NewData Pointer to new EFI_SIGNATURE_LIST to be appended.
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@param[in] NewDataSize Size of NewData buffer.
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@param[out] MergedBufSize Size of the merged buffer
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@return EFI_BUFFER_TOO_SMALL if input Data buffer overflowed
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**/
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EFI_STATUS
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AppendSignatureList (
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IN OUT VOID *Data,
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IN UINTN DataSize,
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IN UINTN FreeBufSize,
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IN VOID *NewData,
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IN UINTN NewDataSize,
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OUT UINTN *MergedBufSize
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);
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/**
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Compare two EFI_TIME data.
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@param FirstTime A pointer to the first EFI_TIME data.
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@param SecondTime A pointer to the second EFI_TIME data.
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@retval TRUE The FirstTime is not later than the SecondTime.
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@retval FALSE The FirstTime is later than the SecondTime.
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**/
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BOOLEAN
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CompareTimeStamp (
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IN EFI_TIME *FirstTime,
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IN EFI_TIME *SecondTime
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);
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/**
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Delete matching signer's certificates when deleting common authenticated
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variable by corresponding VariableName and VendorGuid from "certdb".
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@param[in] VariableName Name of authenticated Variable.
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@param[in] VendorGuid Vendor GUID of authenticated Variable.
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@retval EFI_INVALID_PARAMETER Any input parameter is invalid.
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@retval EFI_NOT_FOUND Fail to find "certdb" or matching certs.
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@retval EFI_OUT_OF_RESOURCES The operation is failed due to lack of resources.
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@retval EFI_SUCCESS The operation is completed successfully.
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**/
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EFI_STATUS
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DeleteCertsFromDb (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid
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);
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/**
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Process variable with EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS set
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Caution: This function may receive untrusted input.
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This function may be invoked in SMM mode, and datasize and data are external input.
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This function will do basic validation, before parse the data.
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This function will parse the authentication carefully to avoid security issues, like
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buffer overflow, integer overflow.
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@param[in] VariableName Name of Variable to be found.
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@param[in] VendorGuid Variable vendor GUID.
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@param[in] Data Data pointer.
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@param[in] DataSize Size of Data found. If size is less than the
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data, this value contains the required size.
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@param[in] Variable The variable information which is used to keep track of variable usage.
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@param[in] Attributes Attribute value of the variable.
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@param[in] AuthVarType Verify against PK or KEK database or private database.
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@param[out] VarDel Delete the variable or not.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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@retval EFI_SECURITY_VIOLATION The variable does NOT pass the validation
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check carried out by the firmware.
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@retval EFI_OUT_OF_RESOURCES Failed to process variable due to lack
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of resources.
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@retval EFI_SUCCESS Variable pass validation successfully.
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**/
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EFI_STATUS
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VerifyTimeBasedPayload (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN VOID *Data,
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IN UINTN DataSize,
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IN VARIABLE_POINTER_TRACK *Variable,
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IN UINT32 Attributes,
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IN AUTHVAR_TYPE AuthVarType,
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OUT BOOLEAN *VarDel
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);
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extern UINT8 *mPubKeyStore;
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extern UINT8 *mCertDbStore;
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extern UINT32 mPubKeyNumber;
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extern VOID *mHashCtx;
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#endif
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