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/* Copyright 2013-2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __STB_H
#define __STB_H
/**
* This reads secure mode and trusted mode from device tree and
* loads drivers accordingly.
*/
extern void stb_init(void);
/**
* As defined in the TCG Platform Firmware Profile specification, the
* digest of 0xFFFFFFFF or 0x00000000 must be extended in PCR[0-7] and
* an EV_SEPARATOR event must be recorded in the event log for PCR[0-7]
* prior to the first invocation of the first Ready to Boot call.
*
* This function should be called before the control is passed to petitboot
* kernel in order to do the proper PCR extend and event log recording as
* defined above. This function also deallocates the memory allocated for secure
* and trusted boot.
*/
extern int stb_final(void);
/**
* sb_verify - verify a resource
* @id : resource id
* @buf : data to be verified
* @len : buf length
*
* This verifies the integrity and authenticity of a resource downloaded from
* PNOR if secure mode is on. The verification is done by the
* verification code flashed in the secure ROM.
*
* For more information refer to 'doc/stb.rst'
*
* returns: 0 otherwise the boot process is aborted
*/
extern int sb_verify(enum resource_id id, void *buf, size_t len);
/**
* tb_measure - measure a resource
* @id : resource id
* @buf : data to be measured
* @len : buf length
*
* This measures a resource downloaded from PNOR if trusted mode is on. That is,
* an EV_ACTION event is recorded in the event log for the mapped PCR, and the
* the sha1 and sha256 measurements are extended in the mapped PCR.
*
* For more information please refer to 'doc/stb.rst'
*
* returns: 0 or an error as defined in status_codes.h
*/
extern int tb_measure(enum resource_id id, void *buf, size_t len);
#endif /* __STB_H */
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