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rsyslog/runtime/librsksi_read.c

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/* librsksi_read.c - rsyslog's guardtime support library
* This includes functions used for reading signature (and
* other related) files. Well, actually it also contains
* some writing functionality, but only as far as rsyslog
* itself is not concerned, but "just" the utility programs.
*
* This part of the library uses C stdio and expects that the
* caller will open and close the file to be read itself.
*
* Copyright 2013-2015 Adiscon GmbH.
*
* This file is part of rsyslog.
*
* 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
* -or-
* see COPYING.ASL20 in the source distribution
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ksi/ksi.h>
#include "librsgt_common.h"
#include "librsksi.h"
typedef unsigned char uchar;
#ifndef VERSION
#define VERSION "no-version"
#endif
#define MAXFNAME 1024
static int rsksi_read_debug = 0;
char *rsksi_read_puburl = ""; /* old default http://verify.guardtime.com/gt-controlpublications.bin";*/
char *rsksi_extend_puburl = ""; /* old default "http://verifier.guardtime.net/gt-extendingservice";*/
char *rsksi_userid = "";
char *rsksi_userkey = "";
uint8_t rsksi_read_showVerified = 0;
/* macro to obtain next char from file including error tracking */
#define NEXTC if((c = fgetc(fp)) == EOF) { \
r = feof(fp) ? RSGTE_EOF : RSGTE_IO; \
goto done; \
}
/* if verbose==0, only the first and last two octets are shown,
* otherwise everything.
*/
static void
outputHexBlob(FILE *fp, const uint8_t *blob, const uint16_t len, const uint8_t verbose)
{
unsigned i;
if(verbose || len <= 8) {
for(i = 0 ; i < len ; ++i)
fprintf(fp, "%2.2x", blob[i]);
} else {
fprintf(fp, "%2.2x%2.2x%2.2x[...]%2.2x%2.2x%2.2x",
blob[0], blob[1], blob[2],
blob[len-3], blob[len-2], blob[len-1]);
}
}
static inline void
outputKSIHash(FILE *fp, char *hdr, const KSI_DataHash *const __restrict__ hash, const uint8_t verbose)
{
const unsigned char *digest;
size_t digest_len;
KSI_DataHash_extract(hash, NULL, &digest, &digest_len); // TODO: error check
fprintf(fp, "%s", hdr);
outputHexBlob(fp, digest, digest_len, verbose);
fputc('\n', fp);
}
static inline void
outputHash(FILE *fp, const char *hdr, const uint8_t *data,
const uint16_t len, const uint8_t verbose)
{
fprintf(fp, "%s", hdr);
outputHexBlob(fp, data, len, verbose);
fputc('\n', fp);
}
void
rsksi_errctxInit(ksierrctx_t *ectx)
{
ectx->fp = NULL;
ectx->filename = NULL;
ectx->recNum = 0;
ectx->ksistate = 0;
ectx->recNumInFile = 0;
ectx->blkNum = 0;
ectx->verbose = 0;
ectx->errRec = NULL;
ectx->frstRecInBlk = NULL;
ectx->fileHash = NULL;
ectx->lefthash = ectx->righthash = ectx->computedHash = NULL;
}
void
rsksi_errctxExit(ksierrctx_t *ectx)
{
free(ectx->filename);
free(ectx->frstRecInBlk);
}
/* note: we do not copy the record, so the caller MUST not destruct
* it before processing of the record is completed. To remove the
* current record without setting a new one, call this function
* with rec==NULL.
*/
void
rsksi_errctxSetErrRec(ksierrctx_t *ectx, char *rec)
{
ectx->errRec = strdup(rec);
}
/* This stores the block's first record. Here we copy the data,
* as the caller will usually not preserve it long enough.
*/
void
rsksi_errctxFrstRecInBlk(ksierrctx_t *ectx, char *rec)
{
free(ectx->frstRecInBlk);
ectx->frstRecInBlk = strdup(rec);
}
static void
reportError(const int errcode, ksierrctx_t *ectx)
{
if(ectx->fp != NULL) {
fprintf(ectx->fp, "%s[%llu:%llu:%llu]: error[%u]: %s\n",
ectx->filename,
(long long unsigned) ectx->blkNum, (long long unsigned) ectx->recNum,
(long long unsigned) ectx->recNumInFile,
errcode, RSKSIE2String(errcode));
if(ectx->frstRecInBlk != NULL)
fprintf(ectx->fp, "\tBlock Start Record.: '%s'\n", ectx->frstRecInBlk);
if(ectx->errRec != NULL)
fprintf(ectx->fp, "\tRecord in Question.: '%s'\n", ectx->errRec);
if(ectx->computedHash != NULL) {
outputKSIHash(ectx->fp, "\tComputed Hash......: ", ectx->computedHash,
ectx->verbose);
}
if(ectx->fileHash != NULL) {
outputHash(ectx->fp, "\tSignature File Hash: ", ectx->fileHash->data,
ectx->fileHash->len, ectx->verbose);
}
if(errcode == RSGTE_INVLD_TREE_HASH ||
errcode == RSGTE_INVLD_TREE_HASHID) {
fprintf(ectx->fp, "\tTree Level.........: %d\n", (int) ectx->treeLevel);
outputKSIHash(ectx->fp, "\tTree Left Hash.....: ", ectx->lefthash,
ectx->verbose);
outputKSIHash(ectx->fp, "\tTree Right Hash....: ", ectx->righthash,
ectx->verbose);
}
if(errcode == RSGTE_INVLD_SIGNATURE ||
errcode == RSGTE_TS_CREATEHASH) {
fprintf(ectx->fp, "\tPublication Server.: %s\n", rsksi_read_puburl);
fprintf(ectx->fp, "\tKSI Verify Signature: [%u]%s\n",
ectx->ksistate, KSI_getErrorString(ectx->ksistate));
}
if(errcode == RSGTE_SIG_EXTEND ||
errcode == RSGTE_TS_CREATEHASH) {
fprintf(ectx->fp, "\tExtending Server...: %s\n", rsksi_extend_puburl);
fprintf(ectx->fp, "\tKSI Extend Signature: [%u]%s\n",
ectx->ksistate, KSI_getErrorString(ectx->ksistate));
}
if(errcode == RSGTE_TS_DERENCODE) {
fprintf(ectx->fp, "\tAPI return state...: [%u]%s\n",
ectx->ksistate, KSI_getErrorString(ectx->ksistate));
}
}
}
/* obviously, this is not an error-reporting function. We still use
* ectx, as it has most information we need.
*/
static void
reportVerifySuccess(ksierrctx_t *ectx) /*OLD CODE , GTVerificationInfo *vrfyInf)*/
{
if(ectx->fp != NULL) {
fprintf(ectx->fp, "%s[%llu:%llu:%llu]: block signature successfully verified\n",
ectx->filename,
(long long unsigned) ectx->blkNum, (long long unsigned) ectx->recNum,
(long long unsigned) ectx->recNumInFile);
if(ectx->frstRecInBlk != NULL)
fprintf(ectx->fp, "\tBlock Start Record.: '%s'\n", ectx->frstRecInBlk);
if(ectx->errRec != NULL)
fprintf(ectx->fp, "\tBlock End Record...: '%s'\n", ectx->errRec);
fprintf(ectx->fp, "\tKSI Verify Signature: [%u]%s\n",
ectx->ksistate, KSI_getErrorString(ectx->ksistate));
/* OLDCODE: NOT NEEDED ANYMORE GTVerificationInfo_print(ectx->fp, 0, vrfyInf);*/
}
}
/* return the actual length in to-be-written octets of an integer */
static inline uint8_t rsksi_tlvGetInt64OctetSize(uint64_t val)
{
if(val >> 56)
return 8;
if((val >> 48) & 0xff)
return 7;
if((val >> 40) & 0xff)
return 6;
if((val >> 32) & 0xff)
return 5;
if((val >> 24) & 0xff)
return 4;
if((val >> 16) & 0xff)
return 3;
if((val >> 8) & 0xff)
return 2;
return 1;
}
static inline int rsksi_tlvfileAddOctet(FILE *newsigfp, int8_t octet)
{
/* Directory write into file */
int r = 0;
if ( fputc(octet, newsigfp) == EOF )
r = RSGTE_IO;
done: return r;
}
static inline int rsksi_tlvfileAddOctetString(FILE *newsigfp, uint8_t *octet, int size)
{
int i, r = 0;
for(i = 0 ; i < size ; ++i) {
r = rsksi_tlvfileAddOctet(newsigfp, octet[i]);
if(r != 0) goto done;
}
done: return r;
}
static inline int rsksi_tlvfileAddInt64(FILE *newsigfp, uint64_t val)
{
uint8_t doWrite = 0;
int r;
if(val >> 56) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 56) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 48) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 48) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 40) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 40) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 32) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 32) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 24) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 24) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 16) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 16) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
if(doWrite || ((val >> 8) & 0xff)) {
r = rsksi_tlvfileAddOctet(newsigfp, (val >> 8) & 0xff), doWrite = 1;
if(r != 0) goto done;
}
r = rsksi_tlvfileAddOctet(newsigfp, val & 0xff);
done: return r;
}
static int
rsksi_tlv8Write(FILE *newsigfp, int flags, int tlvtype, int len)
{
int r;
assert((flags & RSGT_TYPE_MASK) == 0);
assert((tlvtype & RSGT_TYPE_MASK) == tlvtype);
r = rsksi_tlvfileAddOctet(newsigfp, (flags & ~RSKSI_FLAG_TLV16_RUNTIME) | tlvtype);
if(r != 0) goto done;
r = rsksi_tlvfileAddOctet(newsigfp, len & 0xff);
done: return r;
}
static int
rsksi_tlv16Write(FILE *newsigfp, int flags, int tlvtype, uint16_t len)
{
uint16_t typ;
int r;
assert((flags & RSGT_TYPE_MASK) == 0);
assert((tlvtype >> 8 & RSGT_TYPE_MASK) == (tlvtype >> 8));
typ = ((flags | RSKSI_FLAG_TLV16_RUNTIME) << 8) | tlvtype;
r = rsksi_tlvfileAddOctet(newsigfp, typ >> 8);
if(r != 0) goto done;
r = rsksi_tlvfileAddOctet(newsigfp, typ & 0xff);
if(r != 0) goto done;
r = rsksi_tlvfileAddOctet(newsigfp, (len >> 8) & 0xff);
if(r != 0) goto done;
r = rsksi_tlvfileAddOctet(newsigfp, len & 0xff);
done: return r;
}
/**
* Write the provided record to the current file position.
*
* @param[in] fp file pointer for writing
* @param[out] rec tlvrecord to write
*
* @returns 0 if ok, something else otherwise
*/
static int
rsksi_tlvwrite(FILE *fp, tlvrecord_t *rec)
{
int r = RSGTE_IO;
if(fwrite(rec->hdr, (size_t) rec->lenHdr, 1, fp) != 1) goto done;
if(fwrite(rec->data, (size_t) rec->tlvlen, 1, fp) != 1) goto done;
r = 0;
done: return r;
}
/**
* Read a header from a binary file.
* @param[in] fp file pointer for processing
* @param[in] hdr buffer for the header. Must be 9 bytes
* (8 for header + NUL byte)
* @returns 0 if ok, something else otherwise
*/
int
rsksi_tlvrdHeader(FILE *fp, uchar *hdr)
{
int r;
if(fread(hdr, 8, 1, fp) != 1) {
r = RSGTE_IO;
goto done;
}
hdr[8] = '\0';
r = 0;
done: return r;
}
/* read type a complete tlv record
*/
static int
rsksi_tlvRecRead(FILE *fp, tlvrecord_t *rec)
{
int r = 1;
int c;
NEXTC;
rec->hdr[0] = c;
rec->tlvtype = c & 0x1f;
if(c & RSKSI_FLAG_TLV16_RUNTIME) { /* tlv16? */
rec->lenHdr = 4;
NEXTC;
rec->hdr[1] = c;
rec->tlvtype = (rec->tlvtype << 8) | c;
NEXTC;
rec->hdr[2] = c;
rec->tlvlen = c << 8;
NEXTC;
rec->hdr[3] = c;
rec->tlvlen |= c;
} else {
NEXTC;
rec->lenHdr = 2;
rec->hdr[1] = c;
rec->tlvlen = c;
}
if(fread(rec->data, (size_t) rec->tlvlen, 1, fp) != 1) {
r = feof(fp) ? RSGTE_EOF : RSGTE_IO;
goto done;
}
r = 0;
done: return r;
if(r == 0 && rsksi_read_debug)
/* Only show debug if no fail */
printf("debug: read tlvtype %4.4x, len %u\n", (unsigned) rec->tlvtype,
(unsigned) rec->tlvlen);
}
/* decode a sub-tlv record from an existing record's memory buffer
*/
static int
rsksi_tlvDecodeSUBREC(tlvrecord_t *rec, uint16_t *stridx, tlvrecord_t *newrec)
{
int r = 1;
int c;
if(rec->tlvlen == *stridx) {r=RSGTE_LEN; goto done;}
c = rec->data[(*stridx)++];
newrec->hdr[0] = c;
newrec->tlvtype = c & 0x1f;
if(c & RSKSI_FLAG_TLV16_RUNTIME) { /* tlv16? */
newrec->lenHdr = 4;
if(rec->tlvlen == *stridx) {r=RSGTE_LEN; goto done;}
c = rec->data[(*stridx)++];
newrec->hdr[1] = c;
newrec->tlvtype = (newrec->tlvtype << 8) | c;
if(rec->tlvlen == *stridx) {r=RSGTE_LEN; goto done;}
c = rec->data[(*stridx)++];
newrec->hdr[2] = c;
newrec->tlvlen = c << 8;
if(rec->tlvlen == *stridx) {r=RSGTE_LEN; goto done;}
c = rec->data[(*stridx)++];
newrec->hdr[3] = c;
newrec->tlvlen |= c;
} else {
if(rec->tlvlen == *stridx) {r=RSGTE_LEN; goto done;}
c = rec->data[(*stridx)++];
newrec->lenHdr = 2;
newrec->hdr[1] = c;
newrec->tlvlen = c;
}
if(rec->tlvlen < *stridx + newrec->tlvlen) {r=RSGTE_LEN; goto done;}
memcpy(newrec->data, (rec->data)+(*stridx), newrec->tlvlen);
*stridx += newrec->tlvlen;
if(rsksi_read_debug)
printf("debug: read sub-tlv: tlvtype %4.4x, len %u\n",
(unsigned) newrec->tlvtype,
(unsigned) newrec->tlvlen);
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeIMPRINT(tlvrecord_t *rec, imprint_t **imprint)
{
int r = 1;
imprint_t *imp = NULL;
if((imp = calloc(1, sizeof(imprint_t))) == NULL) {
r = RSGTE_OOM;
goto done;
}
imp->hashID = rec->data[0];
if(rec->tlvlen != 1 + hashOutputLengthOctetsKSI(imp->hashID)) {
r = RSGTE_LEN;
goto done;
}
imp->len = rec->tlvlen - 1;
if((imp->data = (uint8_t*)malloc(imp->len)) == NULL) {r=RSGTE_OOM;goto done;}
memcpy(imp->data, rec->data+1, imp->len);
*imprint = imp;
r = 0;
done:
if(r == 0) {
if (rsksi_read_debug)
printf("debug: read tlvDecodeIMPRINT returned %d TLVLen=%d, HashID=%d\n", r, rec->tlvlen, imp->hashID);
} else {
/* Free memory on FAIL!*/
if (imp != NULL)
rsksi_objfree(rec->tlvtype, imp);
}
return r;
}
static int
rsksi_tlvDecodeHASH_ALGO(tlvrecord_t *rec, uint16_t *strtidx, uint8_t *hashAlg)
{
int r = 1;
tlvrecord_t subrec;
CHKr(rsksi_tlvDecodeSUBREC(rec, strtidx, &subrec));
if(!(subrec.tlvtype == 0x01 && subrec.tlvlen == 1)) {
r = RSGTE_FMT;
goto done;
}
*hashAlg = subrec.data[0];
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeBLOCK_IV(tlvrecord_t *rec, uint16_t *strtidx, uint8_t **iv)
{
int r = 1;
tlvrecord_t subrec;
CHKr(rsksi_tlvDecodeSUBREC(rec, strtidx, &subrec));
if(!(subrec.tlvtype == 0x02)) {
r = RSGTE_INVLTYP;
goto done;
}
if((*iv = (uint8_t*)malloc(subrec.tlvlen)) == NULL) {r=RSGTE_OOM;goto done;}
memcpy(*iv, subrec.data, subrec.tlvlen);
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeLAST_HASH(tlvrecord_t *rec, uint16_t *strtidx, imprint_t *imp)
{
int r = 1;
tlvrecord_t subrec;
CHKr(rsksi_tlvDecodeSUBREC(rec, strtidx, &subrec));
if(!(subrec.tlvtype == 0x03)) { r = RSGTE_INVLTYP; goto done; }
imp->hashID = subrec.data[0];
if(subrec.tlvlen != 1 + hashOutputLengthOctetsKSI(imp->hashID)) {
r = RSGTE_LEN;
goto done;
}
imp->len = subrec.tlvlen - 1;
if((imp->data = (uint8_t*)malloc(imp->len)) == NULL) {r=RSGTE_OOM;goto done;}
memcpy(imp->data, subrec.data+1, subrec.tlvlen-1);
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeREC_COUNT(tlvrecord_t *rec, uint16_t *strtidx, uint64_t *cnt)
{
int r = 1;
int i;
uint64_t val;
tlvrecord_t subrec;
CHKr(rsksi_tlvDecodeSUBREC(rec, strtidx, &subrec));
if(!(subrec.tlvtype == 0x01 && subrec.tlvlen <= 8)) { r = RSGTE_INVLTYP; goto done; }
val = 0;
for(i = 0 ; i < subrec.tlvlen ; ++i) {
val = (val << 8) + subrec.data[i];
}
*cnt = val;
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeSIG(tlvrecord_t *rec, uint16_t *strtidx, block_sig_t *bs)
{
int r = 1;
tlvrecord_t subrec;
CHKr(rsksi_tlvDecodeSUBREC(rec, strtidx, &subrec));
if(!(subrec.tlvtype == 0x0906)) { r = RSGTE_INVLTYP; goto done; }
bs->sig.der.len = subrec.tlvlen;
bs->sigID = SIGID_RFC3161;
if((bs->sig.der.data = (uint8_t*)malloc(bs->sig.der.len)) == NULL) {r=RSGTE_OOM;goto done;}
memcpy(bs->sig.der.data, subrec.data, bs->sig.der.len);
r = 0;
done: return r;
}
static int
rsksi_tlvDecodeBLOCK_HDR(tlvrecord_t *rec, block_hdr_t **blockhdr)
{
int r = 1;
uint16_t strtidx = 0;
block_hdr_t *bh = NULL;
if((bh = calloc(1, sizeof(block_hdr_t))) == NULL) {
r = RSGTE_OOM;
goto done;
}
CHKr(rsksi_tlvDecodeHASH_ALGO(rec, &strtidx, &(bh->hashID)));
CHKr(rsksi_tlvDecodeBLOCK_IV(rec, &strtidx, &(bh->iv)));
CHKr(rsksi_tlvDecodeLAST_HASH(rec, &strtidx, &(bh->lastHash)));
if(strtidx != rec->tlvlen) {
r = RSGTE_LEN;
goto done;
}
*blockhdr = bh;
r = 0;
done:
if (r == 0) {
if(rsksi_read_debug)
printf("debug: tlvDecodeBLOCK_HDR returned %d, tlvtype %4.4x\n", r, (unsigned) rec->tlvtype);
} else {
/* Free memory on FAIL!*/
if (bh != NULL)
rsksi_objfree(rec->tlvtype, bh);
}
return r;
}
static int
rsksi_tlvDecodeBLOCK_SIG(tlvrecord_t *rec, block_sig_t **blocksig)
{
int r = 1;
uint16_t strtidx = 0;
block_sig_t *bs = NULL;
if((bs = calloc(1, sizeof(block_sig_t))) == NULL) {
r = RSGTE_OOM;
goto done;
}
CHKr(rsksi_tlvDecodeREC_COUNT(rec, &strtidx, &(bs->recCount)));
CHKr(rsksi_tlvDecodeSIG(rec, &strtidx, bs));
if(strtidx != rec->tlvlen) {
r = RSGTE_LEN;
goto done;
}
*blocksig = bs;
r = 0;
done:
if(r == 0) {
if (rsksi_read_debug)
printf("debug: rsksi_tlvDecodeBLOCK_SIG returned %d, tlvtype %4.4x\n", r, (unsigned) rec->tlvtype);
} else {
/* Free memory on FAIL!*/
if (bs != NULL)
rsksi_objfree(rec->tlvtype, bs);
}
return r;
}
static int
rsksi_tlvRecDecode(tlvrecord_t *rec, void *obj)
{
int r = 1;
switch(rec->tlvtype) {
case 0x0901:
r = rsksi_tlvDecodeBLOCK_HDR(rec, obj);
if(r != 0) goto done;
break;
case 0x0902:
case 0x0903:
r = rsksi_tlvDecodeIMPRINT(rec, obj);
if(r != 0) goto done;
break;
case 0x0904:
r = rsksi_tlvDecodeBLOCK_SIG(rec, obj);
if(r != 0) goto done;
break;
}
done:
if(r == 0 && rsksi_read_debug)
printf("debug: tlvRecDecode returned %d, tlvtype %4.4x\n", r, (unsigned) rec->tlvtype);
return r;
}
static int
rsksi_tlvrdRecHash(FILE *fp, FILE *outfp, imprint_t **imp)
{
int r;
tlvrecord_t rec;
if((r = rsksi_tlvrd(fp, &rec, imp)) != 0) goto done;
if(rec.tlvtype != 0x0902) {
r = RSGTE_MISS_REC_HASH;
rsksi_objfree(rec.tlvtype, *imp);
*imp = NULL;
goto done;
}
if(outfp != NULL)
if((r = rsksi_tlvwrite(outfp, &rec)) != 0) goto done;
r = 0;
done:
if(r == 0 && rsksi_read_debug)
printf("debug: tlvrdRecHash returned %d, rec->tlvtype %4.4x\n", r, (unsigned) rec.tlvtype);
return r;
}
static int
rsksi_tlvrdTreeHash(FILE *fp, FILE *outfp, imprint_t **imp)
{
int r;
tlvrecord_t rec;
if((r = rsksi_tlvrd(fp, &rec, imp)) != 0) goto done;
if(rec.tlvtype != 0x0903) {
r = RSGTE_MISS_TREE_HASH;
rsksi_objfree(rec.tlvtype, *imp);
*imp = NULL;
goto done;
}
if(outfp != NULL)
if((r = rsksi_tlvwrite(outfp, &rec)) != 0) goto done;
r = 0;
done:
if(r == 0 && rsksi_read_debug)
printf("debug: tlvrdTreeHash returned %d, rec->tlvtype %4.4x\n", r, (unsigned) rec.tlvtype);
return r;
}
/* read BLOCK_SIG during verification phase */
static int
rsksi_tlvrdVrfyBlockSig(FILE *fp, block_sig_t **bs, tlvrecord_t *rec)
{
int r;
if((r = rsksi_tlvrd(fp, rec, bs)) != 0) goto done;
if(rec->tlvtype != 0x0904) {
r = RSGTE_MISS_BLOCKSIG;
rsksi_objfree(rec->tlvtype, *bs);
goto done;
}
r = 0;
done: return r;
}
/**
* Read the next "object" from file. This usually is
* a single TLV, but may be something larger, for
* example in case of a block-sig TLV record.
* Unknown type records are ignored (or run aborted
* if we are not permitted to skip).
*
* @param[in] fp file pointer for processing
* @param[out] tlvtype type of tlv record (top-level for
* structured objects.
* @param[out] tlvlen length of the tlv record value
* @param[out] obj pointer to object; This is a proper
* tlv record structure, which must be casted
* by the caller according to the reported type.
* The object must be freed by the caller (TODO: better way?)
*
* @returns 0 if ok, something else otherwise
*/
int
rsksi_tlvrd(FILE *fp, tlvrecord_t *rec, void *obj)
{
int r;
if((r = rsksi_tlvRecRead(fp, rec)) != 0) goto done;
r = rsksi_tlvRecDecode(rec, obj);
done: return r;
}
/* return if a blob is all zero */
static inline int
blobIsZero(uint8_t *blob, uint16_t len)
{
int i;
for(i = 0 ; i < len ; ++i)
if(blob[i] != 0)
return 0;
return 1;
}
static void
rsksi_printIMPRINT(FILE *fp, char *name, imprint_t *imp, uint8_t verbose)
{
fprintf(fp, "%s", name);
outputHexBlob(fp, imp->data, imp->len, verbose);
fputc('\n', fp);
}
static void
rsksi_printREC_HASH(FILE *fp, imprint_t *imp, uint8_t verbose)
{
rsksi_printIMPRINT(fp, "[0x0902]Record hash: ",
imp, verbose);
}
static void
rsksi_printINT_HASH(FILE *fp, imprint_t *imp, uint8_t verbose)
{
rsksi_printIMPRINT(fp, "[0x0903]Tree hash..: ",
imp, verbose);
}
/**
* Output a human-readable representation of a block_hdr_t
* to proviced file pointer. This function is mainly inteded for
* debugging purposes or dumping tlv files.
*
* @param[in] fp file pointer to send output to
* @param[in] bsig ponter to block_hdr_t to output
* @param[in] verbose if 0, abbreviate blob hexdump, else complete
*/
void
rsksi_printBLOCK_HDR(FILE *fp, block_hdr_t *bh, uint8_t verbose)
{
fprintf(fp, "[0x0901]Block Header Record:\n");
fprintf(fp, "\tPrevious Block Hash:\n");
fprintf(fp, "\t Algorithm..: %s\n", hashAlgNameKSI(bh->lastHash.hashID));
fprintf(fp, "\t Hash.......: ");
outputHexBlob(fp, bh->lastHash.data, bh->lastHash.len, verbose);
fputc('\n', fp);
if(blobIsZero(bh->lastHash.data, bh->lastHash.len))
fprintf(fp, "\t NOTE: New Hash Chain Start!\n");
fprintf(fp, "\tHash Algorithm: %s\n", hashAlgNameKSI(bh->hashID));
fprintf(fp, "\tIV............: ");
outputHexBlob(fp, bh->iv, getIVLenKSI(bh), verbose);
fputc('\n', fp);
}
/**
* Output a human-readable representation of a block_sig_t
* to proviced file pointer. This function is mainly inteded for
* debugging purposes or dumping tlv files.
*
* @param[in] fp file pointer to send output to
* @param[in] bsig ponter to block_sig_t to output
* @param[in] verbose if 0, abbreviate blob hexdump, else complete
*/
void
rsksi_printBLOCK_SIG(FILE *fp, block_sig_t *bs, uint8_t verbose)
{
fprintf(fp, "[0x0904]Block Signature Record:\n");
fprintf(fp, "\tRecord Count..: %llu\n", (long long unsigned) bs->recCount);
fprintf(fp, "\tSignature Type: %s\n", sigTypeName(bs->sigID));
fprintf(fp, "\tSignature Len.: %u\n", (unsigned) bs->sig.der.len);
fprintf(fp, "\tSignature.....: ");
outputHexBlob(fp, bs->sig.der.data, bs->sig.der.len, verbose);
fputc('\n', fp);
}
/**
* Output a human-readable representation of a tlv object.
*
* @param[in] fp file pointer to send output to
* @param[in] tlvtype type of tlv object (record)
* @param[in] verbose if 0, abbreviate blob hexdump, else complete
*/
void
rsksi_tlvprint(FILE *fp, uint16_t tlvtype, void *obj, uint8_t verbose)
{
switch(tlvtype) {
case 0x0901:
rsksi_printBLOCK_HDR(fp, obj, verbose);
break;
case 0x0902:
rsksi_printREC_HASH(fp, obj, verbose);
break;
case 0x0903:
rsksi_printINT_HASH(fp, obj, verbose);
break;
case 0x0904:
rsksi_printBLOCK_SIG(fp, obj, verbose);
break;
default:fprintf(fp, "unknown tlv record %4.4x\n", tlvtype);
break;
}
}
/**
* Free the provided object.
*
* @param[in] tlvtype type of tlv object (record)
* @param[in] obj the object to be destructed
*/
void
rsksi_objfree(uint16_t tlvtype, void *obj)
{
// check if obj is valid
if (obj == NULL )
return;
switch(tlvtype) {
case 0x0901:
free(((block_hdr_t*)obj)->iv);
free(((block_hdr_t*)obj)->lastHash.data);
break;
case 0x0902:
case 0x0903:
free(((imprint_t*)obj)->data);
break;
case 0x0904:
free(((block_sig_t*)obj)->sig.der.data);
break;
default:fprintf(stderr, "rsksi_objfree: unknown tlv record %4.4x\n",
tlvtype);
break;
}
free(obj);
}
/**
* Read block parameters. This detects if the block contains the
* individual log hashes, the intermediate hashes and the overall
* block parameters (from the signature block). As we do not have any
* begin of block record, we do not know e.g. the hash algorithm or IV
* until reading the block signature record. And because the file is
* purely sequential and variable size, we need to read all records up to
* the next signature record.
* If a caller intends to verify a log file based on the parameters,
* he must re-read the file from the begining (we could keep things
* in memory, but this is impractical for large blocks). In order
* to facitate this, the function permits to rewind to the original
* read location when it is done.
*
* @param[in] fp file pointer of tlv file
* @param[in] bRewind 0 - do not rewind at end of procesing, 1 - do so
* @param[out] bs block signature record
* @param[out] bHasRecHashes 0 if record hashes are present, 1 otherwise
* @param[out] bHasIntermedHashes 0 if intermediate hashes are present,
* 1 otherwise
*
* @returns 0 if ok, something else otherwise
*/
int
rsksi_getBlockParams(FILE *fp, uint8_t bRewind, block_sig_t **bs, block_hdr_t **bh,
uint8_t *bHasRecHashes, uint8_t *bHasIntermedHashes)
{
int r;
uint64_t nRecs = 0;
uint8_t bDone = 0;
uint8_t bHdr = 0;
off_t rewindPos = 0;
void *obj;
tlvrecord_t rec;
if(bRewind)
rewindPos = ftello(fp);
*bHasRecHashes = 0;
*bHasIntermedHashes = 0;
*bs = NULL;
*bh = NULL;
while(!bDone) { /* we will err out on EOF */
if((r = rsksi_tlvrd(fp, &rec, &obj)) != 0) goto done;
bHdr = 0;
switch(rec.tlvtype) {
case 0x0901:
*bh = (block_hdr_t*) obj;
bHdr = 1;
break;
case 0x0902:
++nRecs;
*bHasRecHashes = 1;
break;
case 0x0903:
*bHasIntermedHashes = 1;
break;
case 0x0904:
*bs = (block_sig_t*) obj;
bDone = 1;
break;
default:fprintf(fp, "unknown tlv record %4.4x\n", rec.tlvtype);
break;
}
if(!bDone && !bHdr)
rsksi_objfree(rec.tlvtype, obj);
}
if(*bHasRecHashes && (nRecs != (*bs)->recCount)) {
r = RSGTE_INVLD_RECCNT;
goto done;
}
if(bRewind) {
if(fseeko(fp, rewindPos, SEEK_SET) != 0) {
r = RSGTE_IO;
goto done;
}
}
done:
return r;
}
/**
* Read the file header and compare it to the expected value.
* The file pointer is placed right after the header.
* @param[in] fp file pointer of tlv file
* @param[in] excpect expected header (e.g. "LOGSIG10")
* @returns 0 if ok, something else otherwise
*/
int
rsksi_chkFileHdr(FILE *fp, char *expect)
{
int r;
char hdr[9];
if((r = rsksi_tlvrdHeader(fp, (uchar*)hdr)) != 0) goto done;
if(strcmp(hdr, expect))
r = RSGTE_INVLHDR;
else
r = 0;
done:
return r;
}
ksifile
rsksi_vrfyConstruct_gf(void)
{
int ksistate;
ksifile ksi;
if((ksi = calloc(1, sizeof(struct ksifile_s))) == NULL)
goto done;
ksi->x_prev = NULL;
/* Create new KSI Context! */
rsksictx ctx = rsksiCtxNew();
ksi->ctx = ctx; /* assign context to ksifile */
/* Setting KSI Extender! */
ksistate = KSI_CTX_setExtender(ksi->ctx->ksi_ctx, rsksi_read_puburl, rsksi_userid, rsksi_userkey);
if(ksistate != KSI_OK) {
fprintf(stderr, "Error %d setting KSI Extender: %s\n", ksistate, KSI_getErrorString(ksistate));
free(ksi);
return NULL;
}
done: return ksi;
}
void
rsksi_vrfyBlkInit(ksifile ksi, block_hdr_t *bh, uint8_t bHasRecHashes, uint8_t bHasIntermedHashes)
{
ksi->hashAlg = hashID2AlgKSI(bh->hashID);
ksi->bKeepRecordHashes = bHasRecHashes;
ksi->bKeepTreeHashes = bHasIntermedHashes;
free(ksi->IV);
ksi->IV = malloc(getIVLenKSI(bh));
memcpy(ksi->IV, bh->iv, getIVLenKSI(bh));
ksi->x_prev = malloc(sizeof(imprint_t));
ksi->x_prev->len=bh->lastHash.len;
ksi->x_prev->hashID = bh->lastHash.hashID;
ksi->x_prev->data = malloc(ksi->x_prev->len);
memcpy(ksi->x_prev->data, bh->lastHash.data, ksi->x_prev->len);
}
static int
rsksi_vrfy_chkRecHash(ksifile ksi, FILE *sigfp, FILE *nsigfp,
KSI_DataHash *hash, ksierrctx_t *ectx)
{
int r = 0;
imprint_t *imp = NULL;
const unsigned char *digest;
KSI_DataHash_extract(hash, NULL, &digest, NULL); // TODO: error check
if((r = rsksi_tlvrdRecHash(sigfp, nsigfp, &imp)) != 0)
reportError(r, ectx);
goto done;
if(imp->hashID != hashIdentifierKSI(ksi->hashAlg)) {
reportError(r, ectx);
r = RSGTE_INVLD_REC_HASHID;
goto done;
}
if(memcmp(imp->data, digest,
hashOutputLengthOctetsKSI(imp->hashID))) {
r = RSGTE_INVLD_REC_HASH;
ectx->computedHash = hash;
ectx->fileHash = imp;
reportError(r, ectx);
ectx->computedHash = NULL, ectx->fileHash = NULL;
goto done;
}
r = 0;
done:
if(imp != NULL)
rsksi_objfree(0x0902, imp);
return r;
}
static int
rsksi_vrfy_chkTreeHash(ksifile ksi, FILE *sigfp, FILE *nsigfp,
KSI_DataHash *hash, ksierrctx_t *ectx)
{
int r = 0;
imprint_t *imp = NULL;
const unsigned char *digest;
KSI_DataHash_extract(hash, NULL, &digest, NULL); // TODO: error check
if((r = rsksi_tlvrdTreeHash(sigfp, nsigfp, &imp)) != 0) {
reportError(r, ectx);
goto done;
}
if(imp->hashID != hashIdentifierKSI(ksi->hashAlg)) {
reportError(r, ectx);
r = RSGTE_INVLD_TREE_HASHID;
goto done;
}
if(memcmp(imp->data, digest,
hashOutputLengthOctetsKSI(imp->hashID))) {
r = RSGTE_INVLD_TREE_HASH;
ectx->computedHash = hash;
ectx->fileHash = imp;
reportError(r, ectx);
ectx->computedHash = NULL, ectx->fileHash = NULL;
goto done;
}
r = 0;
done:
if(imp != NULL) {
if(rsksi_read_debug)
printf("debug: rsgt_vrfy_chkTreeHash returned %d, hashID=%d, Length=%d\n", r, imp->hashID, hashOutputLengthOctetsKSI(imp->hashID));
/* Free memory */
rsksi_objfree(0x0903, imp);
}
return r;
}
int
rsksi_vrfy_nextRec(ksifile ksi, FILE *sigfp, FILE *nsigfp,
unsigned char *rec, size_t len, ksierrctx_t *ectx)
{
int r = 0;
KSI_DataHash *x; /* current hash */
KSI_DataHash *m, *recHash = NULL, *t, *t_del;
uint8_t j;
hash_m_ksi(ksi, &m);
hash_r_ksi(ksi, &recHash, rec, len);
if(ksi->bKeepRecordHashes) {
r = rsksi_vrfy_chkRecHash(ksi, sigfp, nsigfp, recHash, ectx);
if(r != 0) goto done;
}
hash_node_ksi(ksi, &x, m, recHash, 1); /* hash leaf */
if(ksi->bKeepTreeHashes) {
ectx->treeLevel = 0;
ectx->lefthash = m;
ectx->righthash = recHash;
r = rsksi_vrfy_chkTreeHash(ksi, sigfp, nsigfp, x, ectx);
if(r != 0) goto done;
}
rsksiimprintDel(ksi->x_prev);
ksi->x_prev = rsksiImprintFromKSI_DataHash(ksi, x);
/* add x to the forest as new leaf, update roots list */
t = x;
for(j = 0 ; j < ksi->nRoots ; ++j) {
if(ksi->roots_valid[j] == 0) {
ksi->roots_hash[j] = t;
ksi->roots_valid[j] = 1;
t = NULL;
break;
} else if(t != NULL) {
/* hash interim node */
ectx->treeLevel = j+1;
ectx->righthash = t;
t_del = t;
hash_node_ksi(ksi, &t, ksi->roots_hash[j], t_del, j+2);
ksi->roots_valid[j] = 0;
if(ksi->bKeepTreeHashes) {
ectx->lefthash = ksi->roots_hash[j];
r = rsksi_vrfy_chkTreeHash(ksi, sigfp, nsigfp, t, ectx);
if(r != 0) goto done; /* mem leak ok, we terminate! */
}
KSI_DataHash_free(ksi->roots_hash[j]);
KSI_DataHash_free(t_del);
}
}
if(t != NULL) {
/* new level, append "at the top" */
ksi->roots_hash[ksi->nRoots] = t;
ksi->roots_valid[ksi->nRoots] = 1;
++ksi->nRoots;
assert(ksi->nRoots < MAX_ROOTS);
t = NULL;
}
++ksi->nRecords;
/* cleanup */
KSI_DataHash_free(m);
done:
if(recHash != NULL)
KSI_DataHash_free(recHash);
return r;
}
/* TODO: think about merging this with the writer. The
* same applies to the other computation algos.
*/
static int
verifySigblkFinish(ksifile ksi, KSI_DataHash **pRoot)
{
KSI_DataHash *root, *rootDel;
int8_t j;
int r;
if(ksi->nRecords == 0)
goto done;
root = NULL;
for(j = 0 ; j < ksi->nRoots ; ++j) {
if(root == NULL) {
root = ksi->roots_valid[j] ? ksi->roots_hash[j] : NULL;
ksi->roots_valid[j] = 0; /* guess this is redundant with init, maybe del */
} else if(ksi->roots_valid[j]) {
rootDel = root;
hash_node_ksi(ksi, &root, ksi->roots_hash[j], root, j+2);
ksi->roots_valid[j] = 0; /* guess this is redundant with init, maybe del */
KSI_DataHash_free(rootDel);
}
}
*pRoot = root;
r = 0;
done:
ksi->bInBlk = 0;
return r;
}
/* helper for rsksi_extendSig: */
#define COPY_SUBREC_TO_NEWREC \
memcpy(newrec.data+iWr, subrec.hdr, subrec.lenHdr); \
iWr += subrec.lenHdr; \
memcpy(newrec.data+iWr, subrec.data, subrec.tlvlen); \
iWr += subrec.tlvlen;
static inline int
rsksi_extendSig(KSI_Signature *sig, ksifile ksi, tlvrecord_t *rec, ksierrctx_t *ectx)
{
KSI_Signature *extended = NULL;
uint8_t *der = NULL;
size_t lenDer;
int r, rgt;
tlvrecord_t newrec, subrec;
uint16_t iRd, iWr;
/* Extend Signature now using KSI API*/
rgt = KSI_extendSignature(ksi->ctx->ksi_ctx, sig, &extended);
if (rgt != KSI_OK) {
ectx->ksistate = rgt;
r = RSGTE_SIG_EXTEND;
goto done;
}
/* Serialize Signature. */
rgt = KSI_Signature_serialize(extended, &der, &lenDer);
if(rgt != KSI_OK) {
ectx->ksistate = rgt;
r = RSGTE_SIG_EXTEND;
goto done;
}
/* update block_sig tlv record with new extended timestamp */
/* we now need to copy all tlv records before the actual der
* encoded part.
*/
iRd = iWr = 0;
// TODO; check tlvtypes at comment places below!
CHKr(rsksi_tlvDecodeSUBREC(rec, &iRd, &subrec));
/* HASH_ALGO */
COPY_SUBREC_TO_NEWREC
CHKr(rsksi_tlvDecodeSUBREC(rec, &iRd, &subrec));
/* BLOCK_IV */
COPY_SUBREC_TO_NEWREC
CHKr(rsksi_tlvDecodeSUBREC(rec, &iRd, &subrec));
/* LAST_HASH */
COPY_SUBREC_TO_NEWREC
CHKr(rsksi_tlvDecodeSUBREC(rec, &iRd, &subrec));
/* REC_COUNT */
COPY_SUBREC_TO_NEWREC
CHKr(rsksi_tlvDecodeSUBREC(rec, &iRd, &subrec));
/* actual sig! */
newrec.data[iWr++] = 0x09 | RSKSI_FLAG_TLV16_RUNTIME;
newrec.data[iWr++] = 0x06;
newrec.data[iWr++] = (lenDer >> 8) & 0xff;
newrec.data[iWr++] = lenDer & 0xff;
/* now we know how large the new main record is */
newrec.tlvlen = (uint16_t) iWr+lenDer;
newrec.tlvtype = rec->tlvtype;
newrec.hdr[0] = rec->hdr[0];
newrec.hdr[1] = rec->hdr[1];
newrec.hdr[2] = (newrec.tlvlen >> 8) & 0xff;
newrec.hdr[3] = newrec.tlvlen & 0xff;
newrec.lenHdr = 4;
memcpy(newrec.data+iWr, der, lenDer);
/* and finally copy back new record to existing one */
memcpy(rec, &newrec, sizeof(newrec)-sizeof(newrec.data)+newrec.tlvlen+4);
r = 0;
done:
if(extended != NULL)
KSI_Signature_free(extended);
if (der != NULL)
KSI_free(der);
return r;
}
/* Verify the existance of the header.
*/
int
verifyBLOCK_HDRKSI(FILE *sigfp, FILE *nsigfp)
{
int r;
tlvrecord_t rec;
block_hdr_t *bh = NULL;
if ((r = rsksi_tlvrd(sigfp, &rec, &bh)) != 0) goto done;
if (rec.tlvtype != 0x0901) {
r = RSGTE_MISS_BLOCKSIG;
goto done;
}
if (nsigfp != NULL)
if ((r = rsksi_tlvwrite(nsigfp, &rec)) != 0) goto done;
done:
/*if (r == 0 || r == RSGTE_IO) */ {
/* Only free memory if return is OK or error was RSGTE_IO was (happened in rsksi_tlvwrite) */
if (bh != NULL)
rsksi_objfree(rec.tlvtype, bh);
}
if(rsksi_read_debug)
printf("debug: verifyBLOCK_HDRKSI returned %d\n", r);
return r;
}
/* verify the root hash. This also means we need to compute the
* Merkle tree root for the current block.
*/
int
verifyBLOCK_SIGKSI(block_sig_t *bs, ksifile ksi, FILE *sigfp, FILE *nsigfp,
uint8_t bExtend, ksierrctx_t *ectx)
{
int r;
int ksistate;
block_sig_t *file_bs = NULL;
KSI_Signature *sig = NULL;
KSI_DataHash *ksiHash = NULL;
tlvrecord_t rec;
if((r = verifySigblkFinish(ksi, &ksiHash)) != 0)
goto done;
if((r = rsksi_tlvrdVrfyBlockSig(sigfp, &file_bs, &rec)) != 0)
goto done;
if(ectx->recNum != bs->recCount) {
r = RSGTE_INVLD_RECCNT;
goto done;
}
/* Parse KSI Signature */
ksistate = KSI_Signature_parse(ksi->ctx->ksi_ctx, file_bs->sig.der.data, file_bs->sig.der.len, &sig);
if(ksistate != KSI_OK) {
if(rsksi_read_debug)
printf("debug: KSI_Signature_parse failed with error: %s (%d)\n", KSI_getErrorString(ksistate), ksistate);
r = RSGTE_INVLD_SIGNATURE;
ectx->ksistate = ksistate;
goto done;
}
/* OLDCODE
gtstate = GTTimestamp_DERDecode(file_bs->sig.der.data,
file_bs->sig.der.len, &timestamp);
if(gtstate != KSI_OK) {
r = RSGTE_TS_DERDECODE;
ectx->gtstate = gtstate;
goto done;
}
*/
ksistate = KSI_Signature_verifyDataHash(sig, ksi->ctx->ksi_ctx, ksiHash);
if (ksistate != KSI_OK) {
if(rsksi_read_debug)
printf("debug: KSI_Signature_verifyDataHash faile with error: %s (%d)\n", KSI_getErrorString(ksistate), ksistate);
r = RSGTE_INVLD_SIGNATURE;
ectx->ksistate = ksistate;
goto done;
/* TODO proberly additional verify with KSI_Signature_verify*/
}
/* OLD CODE
gtstate = GTHTTP_verifyTimestampHash(timestamp, root, NULL,
NULL, NULL, rsksi_read_puburl, 0, &vrfyInf);
if(! (gtstate == KSI_OK
&& vrfyInf->verification_errors == GT_NO_FAILURES) ) {
r = RSGTE_INVLD_TIMESTAMP;
ectx->gtstate = gtstate;
goto done;
}
*/
if(rsksi_read_debug)
printf("debug: verifyBLOCK_SIGKSI processed without error's\n");
if(rsksi_read_showVerified)
reportVerifySuccess(ectx); /*OLDCODE, vrfyInf);*/
if(bExtend)
if((r = rsksi_extendSig(sig, ksi, &rec, ectx)) != 0) goto done;
if(nsigfp != NULL)
if((r = rsksi_tlvwrite(nsigfp, &rec)) != 0) goto done;
r = 0;
done:
if(file_bs != NULL)
rsksi_objfree(0x0904, file_bs);
if(r != 0)
reportError(r, ectx);
if(ksiHash != NULL)
KSI_DataHash_free(ksiHash);
if(sig != NULL)
KSI_Signature_free(sig);
return r;
}
/* Helper function to enable debug */
void rsksi_set_debug(int iDebug)
{
rsksi_read_debug = iDebug;
}
/* Helper function to convert an old V10 signature file into V11 */
int rsksi_ConvertSigFile(char* name, FILE *oldsigfp, FILE *newsigfp, int verbose)
{
int r = 0, rRead = 0;
imprint_t *imp = NULL;
tlvrecord_t rec;
tlvrecord_t subrec;
/* For signature convert*/
int i;
uint16_t strtidx = 0;
block_hdr_t *bh = NULL;
block_sig_t *bs = NULL;
uint16_t typconv;
unsigned tlvlen;
uint8_t tlvlenRecords;
/* Temporary change flags back to old default */
RSKSI_FLAG_TLV16_RUNTIME = 0x20;
/* Start reading Sigblocks from old FILE */
while(1) { /* we will err out on EOF */
rRead = rsksi_tlvRecRead(oldsigfp, &rec);
if(rRead == 0 /*|| rRead == RSGTE_EOF*/) {
switch(rec.tlvtype) {
case 0x0900:
case 0x0901:
/* Convert tlvrecord Header */
if (rec.tlvtype == 0x0900) {
typconv = ((0x00 /*flags*/ | 0x80 /* NEW RSKSI_FLAG_TLV16_RUNTIME*/) << 8) | 0x0902;
rec.hdr[0] = typconv >> 8;
rec.hdr[1] = typconv & 0xff;
} else if (rec.tlvtype == 0x0901) {
typconv = ((0x00 /*flags*/ | 0x80 /* NEW RSKSI_FLAG_TLV16_RUNTIME*/) << 8) | 0x0903;
rec.hdr[0] = typconv >> 8;
rec.hdr[1] = typconv & 0xff;
}
/* Debug verification output */
r = rsksi_tlvDecodeIMPRINT(&rec, &imp);
if(r != 0) goto donedecode;
rsksi_printREC_HASH(stdout, imp, verbose);
/* Output into new FILE */
if((r = rsksi_tlvwrite(newsigfp, &rec)) != 0) goto done;
/* Free mem*/
free(imp->data);
free(imp);
imp = NULL;
break;
case 0x0902:
/* Split Data into HEADER and BLOCK */
strtidx = 0;
/* Create BH and BS*/
if((bh = calloc(1, sizeof(block_hdr_t))) == NULL) {
r = RSGTE_OOM;
goto donedecode;
}
if((bs = calloc(1, sizeof(block_sig_t))) == NULL) {
r = RSGTE_OOM;
goto donedecode;
}
/* Check OLD encoded HASH ALGO */
CHKrDecode(rsksi_tlvDecodeSUBREC(&rec, &strtidx, &subrec));
if(!(subrec.tlvtype == 0x00 && subrec.tlvlen == 1)) {
r = RSGTE_FMT;
goto donedecode;
}
bh->hashID = subrec.data[0];
/* Check OLD encoded BLOCK_IV */
CHKrDecode(rsksi_tlvDecodeSUBREC(&rec, &strtidx, &subrec));
if(!(subrec.tlvtype == 0x01)) {
r = RSGTE_INVLTYP;
goto donedecode;
}
if((bh->iv = (uint8_t*)malloc(subrec.tlvlen)) == NULL) {r=RSGTE_OOM;goto donedecode;}
memcpy(bh->iv, subrec.data, subrec.tlvlen);
/* Check OLD encoded LAST HASH */
CHKrDecode(rsksi_tlvDecodeSUBREC(&rec, &strtidx, &subrec));
if(!(subrec.tlvtype == 0x02)) { r = RSGTE_INVLTYP; goto donedecode; }
bh->lastHash.hashID = subrec.data[0];
if(subrec.tlvlen != 1 + hashOutputLengthOctetsKSI(bh->lastHash.hashID)) {
r = RSGTE_LEN;
goto donedecode;
}
bh->lastHash.len = subrec.tlvlen - 1;
if((bh->lastHash.data = (uint8_t*)malloc(bh->lastHash.len)) == NULL) {r=RSGTE_OOM;goto donedecode;}
memcpy(bh->lastHash.data, subrec.data+1, subrec.tlvlen-1);
/* Debug verification output */
rsksi_printBLOCK_HDR(stdout, bh, verbose);
/* Check OLD encoded COUNT */
CHKrDecode(rsksi_tlvDecodeSUBREC(&rec, &strtidx, &subrec));
if(!(subrec.tlvtype == 0x03 && subrec.tlvlen <= 8)) { r = RSGTE_INVLTYP; goto donedecode; }
bs->recCount = 0;
for(i = 0 ; i < subrec.tlvlen ; ++i) {
bs->recCount = (bs->recCount << 8) + subrec.data[i];
}
/* Check OLD encoded SIG */
CHKrDecode(rsksi_tlvDecodeSUBREC(&rec, &strtidx, &subrec));
if(!(subrec.tlvtype == 0x0906)) { r = RSGTE_INVLTYP; goto donedecode; }
bs->sig.der.len = subrec.tlvlen;
bs->sigID = SIGID_RFC3161;
if((bs->sig.der.data = (uint8_t*)malloc(bs->sig.der.len)) == NULL) {r=RSGTE_OOM;goto donedecode;}
memcpy(bs->sig.der.data, subrec.data, bs->sig.der.len);
/* Debug output */
rsksi_printBLOCK_SIG(stdout, bs, verbose);
if(strtidx != rec.tlvlen) {
r = RSGTE_LEN;
goto donedecode;
}
/* Set back to NEW default */
RSKSI_FLAG_TLV16_RUNTIME = 0x80;
/* Create Block Header */
tlvlen = 2 + 1 /* hash algo TLV */ +
2 + hashOutputLengthOctetsKSI(bh->hashID) /* iv */ +
2 + 1 + bh->lastHash.len /* last hash */;
/* write top-level TLV object block-hdr */
CHKrDecode(rsksi_tlv16Write(newsigfp, 0x00, 0x0901, tlvlen));
/* and now write the children */
/* hash-algo */
CHKrDecode(rsksi_tlv8Write(newsigfp, 0x00, 0x01, 1));
CHKrDecode(rsksi_tlvfileAddOctet(newsigfp, hashIdentifierKSI(bh->hashID)));
/* block-iv */
CHKrDecode(rsksi_tlv8Write(newsigfp, 0x00, 0x02, hashOutputLengthOctetsKSI(bh->hashID)));
CHKrDecode(rsksi_tlvfileAddOctetString(newsigfp, bh->iv, hashOutputLengthOctetsKSI(bh->hashID)));
/* last-hash */
CHKrDecode(rsksi_tlv8Write(newsigfp, 0x00, 0x03, bh->lastHash.len + 1));
CHKrDecode(rsksi_tlvfileAddOctet(newsigfp, bh->lastHash.hashID));
CHKrDecode(rsksi_tlvfileAddOctetString(newsigfp, bh->lastHash.data, bh->lastHash.len));
/* Create Block Signature */
tlvlenRecords = rsksi_tlvGetInt64OctetSize(bs->recCount);
tlvlen = 2 + tlvlenRecords /* rec-count */ +
4 + bs->sig.der.len /* rfc-3161 */;
/* write top-level TLV object (block-sig */
CHKrDecode(rsksi_tlv16Write(newsigfp, 0x00, 0x0904, tlvlen));
/* and now write the children */
/* rec-count */
CHKrDecode(rsksi_tlv8Write(newsigfp, 0x00, 0x01, tlvlenRecords));
CHKrDecode(rsksi_tlvfileAddInt64(newsigfp, bs->recCount));
/* rfc-3161 */
CHKrDecode(rsksi_tlv16Write(newsigfp, 0x00, 0x906, bs->sig.der.len));
CHKrDecode(rsksi_tlvfileAddOctetString(newsigfp, bs->sig.der.data, bs->sig.der.len));
donedecode:
/* Set back to OLD default */
RSKSI_FLAG_TLV16_RUNTIME = 0x20;
/* Free mem*/
if (bh != NULL) {
free(bh->iv);
free(bh->lastHash.data);
free(bh);
bh = NULL;
}
if (bs != NULL) {
free(bs->sig.der.data);
free(bs);
bs = NULL;
}
if(r != 0) goto done;
break;
default:
fprintf(stdout, "unknown tlv record %4.4x\n", rec.tlvtype);
break;
}
} else {
/*if(feof(oldsigfp))
break;
else*/
r = rRead;
if(r == RSGTE_EOF)
r = 0; /* Successfully finished file */
else if(rsksi_read_debug)
printf("debug: rsksi_ConvertSigFile failed to read with error %d\n", r);
goto done;
}
/* Abort further processing if EOF */
if (rRead == RSGTE_EOF)
goto done;
}
done:
if(rsksi_read_debug)
printf("debug: rsksi_ConvertSigFile returned %d\n", r);
return r;
}
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