/*
** Clearsign the given blob. Put the signed version in
** pOut.
*/
int clearsign(Blob *pIn, Blob *pOut){
char *zRand;
char *zIn;
char *zOut;
char *zBase = db_get("pgp-command", "gpg --clearsign -o ");
char *zCmd;
int rc;
if( is_false(zBase) ){
return 0;
}
zRand = db_text(0, "SELECT hex(randomblob(10))");
zOut = mprintf("out-%s", zRand);
zIn = mprintf("in-%z", zRand);
blob_write_to_file(pIn, zOut);
zCmd = mprintf("%s %s %s", zBase, zIn, zOut);
rc = fossil_system(zCmd);
free(zCmd);
if( rc==0 ){
if( pOut==pIn ){
blob_reset(pIn);
}
blob_zero(pOut);
blob_read_from_file(pOut, zIn);
}else{
if( pOut!=pIn ){
blob_copy(pOut, pIn);
}
}
file_delete(zOut);
file_delete(zIn);
free(zOut);
free(zIn);
return rc;
}
/*
** Extract the content for ID rid and put it into the
** uninitialized blob. Return 1 on success. If the record
** is a phantom, zero pBlob and return 0.
*/
int content_get(int rid, Blob *pBlob){
int rc;
int i;
int nextRid;
assert( g.repositoryOpen );
blob_zero(pBlob);
if( rid==0 ) return 0;
/* Early out if we know the content is not available */
if( bag_find(&contentCache.missing, rid) ){
return 0;
}
/* Look for the artifact in the cache first */
if( bag_find(&contentCache.inCache, rid) ){
for(i=0; i<contentCache.n; i++){
if( contentCache.a[i].rid==rid ){
blob_copy(pBlob, &contentCache.a[i].content);
contentCache.a[i].age = contentCache.nextAge++;
return 1;
}
}
}
nextRid = findSrcid(rid);
if( nextRid==0 ){
rc = content_of_blob(rid, pBlob);
}else{
int n = 1;
int nAlloc = 10;
int *a = 0;
int mx;
Blob delta, next;
a = fossil_malloc( sizeof(a[0])*nAlloc );
a[0] = rid;
a[1] = nextRid;
n = 1;
while( !bag_find(&contentCache.inCache, nextRid)
&& (nextRid = findSrcid(nextRid))>0 ){
n++;
if( n>=nAlloc ){
if( n>db_int(0, "SELECT max(rid) FROM blob") ){
fossil_panic("infinite loop in DELTA table");
}
nAlloc = nAlloc*2 + 10;
a = fossil_realloc(a, nAlloc*sizeof(a[0]));
}
a[n] = nextRid;
}
mx = n;
rc = content_get(a[n], pBlob);
n--;
while( rc && n>=0 ){
rc = content_of_blob(a[n], &delta);
if( rc ){
blob_delta_apply(pBlob, &delta, &next);
blob_reset(&delta);
if( (mx-n)%8==0 ){
content_cache_insert(a[n+1], pBlob);
}else{
blob_reset(pBlob);
}
*pBlob = next;
}
n--;
}
free(a);
if( !rc ) blob_reset(pBlob);
}
if( rc==0 ){
bag_insert(&contentCache.missing, rid);
}else{
bag_insert(&contentCache.available, rid);
}
return rc;
}
/*
** Rebuild cross-referencing information for the artifact
** rid with content pBase and all of its descendants. This
** routine clears the content buffer before returning.
**
** If the zFNameFormat variable is set, then this routine is
** called to run "fossil deconstruct" instead of the usual
** "fossil rebuild". In that case, instead of rebuilding the
** cross-referencing information, write the file content out
** to the appropriate directory.
**
** In both cases, this routine automatically recurses to process
** other artifacts that are deltas off of the current artifact.
** This is the most efficient way to extract all of the original
** artifact content from the Fossil repository.
*/
static void rebuild_step(int rid, int size, Blob *pBase){
static Stmt q1;
Bag children;
Blob copy;
Blob *pUse;
int nChild, i, cid;
while( rid>0 ){
/* Fix up the "blob.size" field if needed. */
if( size!=blob_size(pBase) ){
db_multi_exec(
"UPDATE blob SET size=%d WHERE rid=%d", blob_size(pBase), rid
);
}
/* Find all children of artifact rid */
db_static_prepare(&q1, "SELECT rid FROM delta WHERE srcid=:rid");
db_bind_int(&q1, ":rid", rid);
bag_init(&children);
while( db_step(&q1)==SQLITE_ROW ){
int cid = db_column_int(&q1, 0);
if( !bag_find(&bagDone, cid) ){
bag_insert(&children, cid);
}
}
nChild = bag_count(&children);
db_reset(&q1);
/* Crosslink the artifact */
if( nChild==0 ){
pUse = pBase;
}else{
blob_copy(©, pBase);
pUse = ©
}
if( zFNameFormat==0 ){
/* We are doing "fossil rebuild" */
manifest_crosslink(rid, pUse, MC_NONE);
}else{
/* We are doing "fossil deconstruct" */
char *zUuid = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid);
char *zFile = mprintf(zFNameFormat, zUuid, zUuid+prefixLength);
blob_write_to_file(pUse,zFile);
free(zFile);
free(zUuid);
blob_reset(pUse);
}
assert( blob_is_reset(pUse) );
rebuild_step_done(rid);
/* Call all children recursively */
rid = 0;
for(cid=bag_first(&children), i=1; cid; cid=bag_next(&children, cid), i++){
static Stmt q2;
int sz;
db_static_prepare(&q2, "SELECT content, size FROM blob WHERE rid=:rid");
db_bind_int(&q2, ":rid", cid);
if( db_step(&q2)==SQLITE_ROW && (sz = db_column_int(&q2,1))>=0 ){
Blob delta, next;
db_ephemeral_blob(&q2, 0, &delta);
blob_uncompress(&delta, &delta);
blob_delta_apply(pBase, &delta, &next);
blob_reset(&delta);
db_reset(&q2);
if( i<nChild ){
rebuild_step(cid, sz, &next);
}else{
/* Tail recursion */
rid = cid;
size = sz;
blob_reset(pBase);
*pBase = next;
}
}else{
db_reset(&q2);
blob_reset(pBase);
}
}
bag_clear(&children);
}
}