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/********************************************************************************/
/* */
/* IMA Routines */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* $Id: imalib.h 1020 2017-06-09 18:46:45Z kgoldman $ */
/* */
/* (c) Copyright IBM Corporation 2016. */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the following disclaimer. */
/* */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/********************************************************************************/
#ifndef IMA_H
#define IMA_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/param.h>
#include <tss2/TPM_Types.h>
/* Debian/Hurd does not define MAXPATHLEN */
#ifndef MAXPATHLEN
#define MAXPATHLEN 4096
#endif
#define IMA_PCR 10
/* FIXME need better error codes */
#define ERR_STRUCTURE 1 /* this is not the stream for the structure to be parsed */
#define ERR_HASH_ALGORITHM 2 /* unsupported hash algorithm */
#define TCG_EVENT_NAME_LEN_MAX 255 /* FIXME need verification */
#define TCG_TEMPLATE_DATA_LEN_MAX \
sizeof(uint32_t) + /* hash length */ \
65 + /* hash algorithm as text */ \
32 + /* file data hash */ \
sizeof(uint32_t) + /* file name length */ \
MAXPATHLEN+1 + /* file name */ \
sizeof(uint32_t) + /* signature length */ \
32 + 256 /* signature */
/* from security/integrity/integrity.h: */
enum evm_ima_xattr_type {
IMA_XATTR_DIGEST = 0x01,
EVM_XATTR_HMAC,
EVM_IMA_XATTR_DIGSIG,
IMA_XATTR_DIGEST_NG,
IMA_XATTR_LAST
};
/* from include/uapi/linux/hash_info.h: */
enum hash_algo {
HASH_ALGO_MD4,
HASH_ALGO_MD5,
HASH_ALGO_SHA1,
HASH_ALGO_RIPE_MD_160,
HASH_ALGO_SHA256,
HASH_ALGO_SHA384,
HASH_ALGO_SHA512,
HASH_ALGO_SHA224,
HASH_ALGO_RIPE_MD_128,
HASH_ALGO_RIPE_MD_256,
HASH_ALGO_RIPE_MD_320,
HASH_ALGO_WP_256,
HASH_ALGO_WP_384,
HASH_ALGO_WP_512,
HASH_ALGO_TGR_128,
HASH_ALGO_TGR_160,
HASH_ALGO_TGR_192,
HASH_ALGO__LAST
};
#define IMA_UNSUPPORTED 0
#define IMA_NG 1
#define IMA_SIG 2
//typedef TPM_DIGEST TPM_PCRVALUE; /* The value inside of the PCR */
typedef struct ImaEvent {
uint32_t pcrIndex;
uint8_t digest[SHA1_DIGEST_SIZE]; /* IMA hard coded to SHA-1 */
uint32_t name_len;
char name[TCG_EVENT_NAME_LEN_MAX + 1];
unsigned int nameInt; /* integer for template data handler */
struct ima_template_desc *template_desc; /* template descriptor */
uint32_t template_data_len;
uint8_t *template_data; /* template related data */
} ImaEvent;
typedef struct ImaTemplateData {
uint32_t hashLength;
char hashAlg[64+1]; /* FIXME need verification */
int hashNid;
uint32_t fileDataHashLength;
uint8_t fileDataHash[SHA256_DIGEST_SIZE];
uint32_t fileNameLength;
uint8_t fileName[MAXPATHLEN+1];
uint32_t sigLength;
uint32_t sigHeaderLength;
uint8_t sigHeader[9]; /* FIXME need verification, length and contents */
uint16_t signatureSize;
uint8_t signature[256]; /* FIXME need verification */
} ImaTemplateData;
#ifdef __cplusplus
extern "C" {
#endif
void IMA_Event_Init(ImaEvent *imaEvent);
void IMA_Event_Free(ImaEvent *imaEvent);
void IMA_Event_Trace(ImaEvent *imaEvent, int traceTemplate);
void IMA_TemplateData_Trace(ImaTemplateData *imaTemplateData,
unsigned int nameInt);
uint32_t IMA_Event_ReadFile(ImaEvent *imaEvent,
int *endOfFile,
FILE *infile,
int littleEndian);
uint32_t IMA_Event_ReadBuffer(ImaEvent *imaEvent,
size_t *length,
uint8_t **buffer,
int *endOfBuffer,
int littleEndian,
int getTemplate);
uint32_t IMA_TemplateData_ReadBuffer(ImaTemplateData *imaTemplateData,
ImaEvent *imaEvent,
int littleEndian);
uint32_t IMA_Event_Write(ImaEvent *imaEvent,
FILE *outFile);
uint32_t IMA_Extend(TPMT_HA *imapcr,
ImaEvent *imaEvent,
TPMI_ALG_HASH hashAlg);
uint32_t IMA_VerifyImaDigest(uint32_t *badEvent,
ImaEvent *imaEvent,
int eventNum);
TPM_RC ImaEvent_Marshal(ImaEvent *source,
uint16_t *written, uint8_t **buffer, int32_t *size);
#if 0
uint32_t IMA_Event_ToString(char **eventString,
ImaEvent *imaEvent);
#endif
#ifdef __cplusplus
}
#endif
#endif
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