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eSqlite3.c
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eSqlite3.c
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#include "hve_amm.h"
#include "utils.h"
#include "aesU.h"
#include <pbc/pbc.h>
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include "eSqlite3.h"
static int internal_callback(void *NotUsed, int argc, char **argv, char **azColName){
/* int i;
for(i=0; i<argc; i++){
printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
}
printf("\n");*/
return 0;
}
static int callbackPos(void *data, int argc, char **argv, char **azColName){
if(argv[0]!=NULL){
*((int*)data)=atoi(argv[0]);
return 0;
}
return 1;
}
static int getpos(eSqlite3 *db, char *tabname, char *colname){
char sql[200];
int rc,pos;
char *errMsg;
sprintf(sql,"SELECT POS FROM STRTAB WHERE COLNAME='%s_%s';",tabname,colname);
rc=sqlite3_exec(db,sql,callbackPos,(void*)&pos,&errMsg);
if(rc != SQLITE_OK){
printf("%s\n",errMsg);
return -1;
}
return pos;
}
static void reorderCols(eSqlite3 *db,char *tabName, char **cols, char **vals, int n){
int *pos,j=0,tmpInt;
char *tmp,*tmpVal;
pos = malloc(sizeof(int)*n);
for(int i=0; i<n ; i++){
pos[i]=getpos(db,tabName,cols[i])-1;
}
while(j<n){
if(pos[j]==j){
j++;
continue;
}
tmp=cols[pos[j]];
tmpVal=vals[pos[j]];
tmpInt=pos[pos[j]];
cols[pos[j]]=cols[j];
vals[pos[j]]=vals[j];
pos[pos[j]]=pos[j];
cols[j]=tmp;
vals[j]=tmpVal;
pos[j]=tmpInt;
}
/*for(int i=0; i<n ; i++){
printf("%s | ",cols[i]);
}
printf("\n");*/
}
int eSqlite3_setUp(
eSqlite3 *db, /*An open db*/
char *pairingFile, /*Pairing filename*/
int l, /*columns number*/
const char *filename) /*keys filename */
{
pairing_t *pairing = load_pairing(pairingFile);
printInfo(*pairing);
char *mpkName, *mskName;
char *sql;
char *errmsg=0;
sql = "CREATE TABLE STRTAB(" \
"COLNAME TEXT PRIMARY KEY NOT NULL," \
"POS INT NOT NULL"\
");";
sqlite3_exec(db,sql,internal_callback,0,&errmsg);
mpkName=malloc(strlen(filename)+5);
sprintf(mpkName,"%s.mpk",filename);
FILE *fmpk=fopen(mpkName,"w");
if (fmpk==NULL){
fprintf(stderr,"Cannot open file %s\n",mpkName);
return -1;
}
mskName=malloc(strlen(filename)+5);
sprintf(mskName,"%s.msk",filename);
FILE *fmsk=fopen(mskName,"w");
if (fmsk==NULL){
fprintf(stderr,"Cannot open file %s\n",mskName);
return -1;
}
Asetup_t *setUp=Asetup(pairing,l);
storeAMpk(pairing,setUp,fmpk);
storeAMsk(pairing,setUp,fmsk);
return 0;
}//end setUp
int eSqlite3_selectGenToken(
eSqlite3 *db,
char *pairingFile, /*Pairing filename */
const char *fmskstr, /* Master secret key filename */
const char *tok, /* Token filename */
const char *sql /* SQL select query */
)
{
FILE *ftok, *fkey, *fmsk;
char *ftokName, *fkeyName, *fmskName,*conditions,*tabName,**cols,**vals;
int *colsPos,n;
cols = malloc(sizeof(char*));
vals = malloc(sizeof(char*));
/* print string n2 of all lines in which string n1 is name */
pairing_t *pairing = load_pairing(pairingFile);
#ifdef VERBOSE
printInfo(*pairing);
#endif
extractDataSql(sql,&tabName,&cols,&vals,NULL,&n);
colsPos = malloc(sizeof(int)*n);
conditions=malloc(sizeof(char));
sprintf(conditions,"");
colsPos[0]=getpos(db,tabName,cols[0]);
for(int i = 1;i < n ; i++){
colsPos[i]=getpos(db,tabName,cols[i]);
conditions = realloc(conditions,sizeof(char)*strlen(cols[i])+strlen(vals[i-1])+1);
strcat(conditions,cols[i]);//not clever
strcat(conditions," ");
strcat(conditions,vals[i-1]);
strcat(conditions," ");
}
/* open file msk file */
if ((fmsk=fopen(fmskstr,"r"))==NULL){
fprintf(stderr,"Cannot open file %s for reading\n",fmskstr);
return -1;
}
/* open token file */
if ((ftok=fopen(tok,"w"))==NULL){
fprintf(stderr,"Cannot open file %s for writing\n",ftokName);
return -1;
}
Asetup_t * SetUp=readAMsk(pairing,fmsk); fclose(fmsk);
int l=SetUp->l;
//attributes for reading n2 string of lines with n1 string=argv[4]
int *Attr=malloc((l+2)*sizeof(int));
for(int i=1;i<l+1;i++) Attr[i]=-1;
for(int j=1;j<n;j++){
Attr[colsPos[j]]=*((unsigned int*) sha256(vals[j-1]));
//Attr[l+i]=colsPos[i];
}
Attr[l+1]=colsPos[0];
#ifdef VERBOSE
for(int i=1;i<l+2;i++) printf("(%d) The attr is %d\n",i,Attr[i]);
#endif
//generate decryption key for Attr
Akey_t *Key2=Akeygen(pairing,SetUp->privatel,SetUp->private1,conditions,Attr);
storeAkey(pairing,Key2,ftok);
fclose(ftok);
free(conditions);
free(colsPos);
return 0;
}
int eSqlite3_exec(
sqlite3* db, /* An open database */
const char *sql, /* SQL to be evaluated */
int (*callback)(void*,int,char**,char**), /* Callback function */
void *arg, /* 1st argument to callback */
char **errmsg, /* Error msg written here */
char *pairing, /* Pairing filename */
char *mpk, /* Masert public key filename */
Akey_t **tokens,
int size
)
{
char *sqlTok,*tmp;
tmp=malloc(sizeof(char)*strlen(sql));
strcpy(tmp,sql);
int rc = SQLITE_OK;
sqlTok=strtok(tmp,";");
while(sqlTok!=NULL){
char *sqlAct = malloc(sizeof(char)*strlen(sqlTok)+2);
sprintf(sqlAct,"%s;",sqlTok);
if(strncmp(sqlAct,"CREATE",6)==0){
rc = eSqlite3_create(db,sqlAct,internal_callback,0,errmsg);
if( rc != SQLITE_OK ){
free(sqlAct);
goto EXIT_EXEC;
}
}
if(strncmp(sqlAct,"INSERT",6)==0){
assert(mpk!=NULL);
assert(pairing!=NULL);
rc = eSqlite3_encrypt(db,pairing,mpk,sqlAct,errmsg);
if( rc != SQLITE_OK ){
free(sqlAct);
goto EXIT_EXEC;
}
}
if(strncmp(sqlAct,"SELECT",6)==0){
rc = eSqlite3_select(db,sqlAct,pairing,tokens,callback,size);
}
free(sqlAct);
sqlTok=strtok(NULL,";");
}
EXIT_EXEC:
free(tmp);
return rc;
}
int eSqlite3_create(
eSqlite3* db, /* An open database */
const char *sql, /* SQL to be evaluated */
int (*callback)(void*,int,char**,char**), /* Callback function */
void *arg, /* 1st argument to callback */
char **errmsg /* Error msg written here */
)
{
char *tabName,*foutName;
char **cols = malloc(sizeof(char*));
char **vals = malloc(sizeof(char*));
int n,rc;
FILE *fout;
extractDataSql(sql,&tabName,&cols,&vals,NULL,&n);
foutName=malloc(strlen(tabName)+5);
sprintf(foutName,"%s.hve",tabName);
if((fout=fopen(foutName,"a"))==NULL){
char *msg = "ERROR CREATING TABLE";
*errmsg=msg;
return SQLITE_ERROR;
}
char *intsql = malloc(sizeof(char)*strlen(sql));
sprintf(intsql,"CREATE TABLE %s_CRPT( ID TEXT PRIMARY KEY NOT NULL );",tabName);
rc = sqlite3_exec(db,intsql,internal_callback,0,errmsg);
if( rc != SQLITE_OK ){
goto EXITCREATE;
}
for(int j=0;j<n;j++){
sprintf(intsql,"INSERT INTO STRTAB (COLNAME,POS) VALUES ('%s_%s',%d);",tabName,cols[j],j+1);
rc=sqlite3_exec(db,intsql,internal_callback,0,errmsg);
if( rc != SQLITE_OK ){
goto EXITCREATE;
}
}
/*rc = sqlite3_exec(db,sql,callback,arg,errmsg);
if( rc != SQLITE_OK ){
goto EXITCREATE;
}*/ //store all data into sqlite database
EXITCREATE: //exit actions
free(tabName);
free(intsql);
free(vals);
return rc;
}
int eSqlite3_encrypt(
eSqlite3 *db, /*An open database*/
char *pairing, /*Pairing filename */
char *mpk, /*Master public key filename*/
char *sql, /*sql insert command*/
char **errmsg /* Error msg written here */
)
{
int rc;
char *tabName, *foutNamer, *fkeyName,*fmpkName, *fenckeyName;
char **cols = malloc(sizeof(char*));
char **vals = malloc(sizeof(char*));
char *sqlInt;
unsigned char *hash;
int n,primary;
FILE *fmpk,*fout,*fkey,*fenckey,*foutName;
pairing_t *pairingstr = load_pairing(pairing);
#ifdef VERBOSE
printInfo(*pairingstr);
printf("sql=%s",sql);
#endif
extractDataSql(sql,&tabName,&cols,&vals,&primary,&n);
fmpkName=malloc(strlen(mpk)+5);
sprintf(fmpkName,"%s.mpk",mpk);
if ((fmpk=fopen(fmpkName,"r"))==NULL){
fprintf(stderr,"%s: cannot open file %s\n",fmpkName,mpk);
return -1;
}
Asetup_t * SetUp=readAMpk(pairingstr,fmpk);
fclose(fmpk);
foutName=malloc(strlen(tabName)+5);
sprintf(foutName,"%s.hve",tabName);
if((fout=fopen(foutName,"r"))==NULL){
char *msg = "TABLE DOESNT EXIST";
*errmsg=msg;
return SQLITE_ERROR;
}else{ fclose(fout); }
if ((fout=fopen(foutName,"a+"))==NULL){
fprintf(stderr,"Cannot open file %s\n",foutName);
return -1;
}
fkeyName=malloc(strlen(tabName)+5);
sprintf(fkeyName,"%s.key",tabName);
if ((fkey=fopen(fkeyName,"a+"))==NULL){
fprintf(stderr,"Cannot open file %s\n",fkeyName);
return -1;
}
fenckeyName=malloc(strlen(tabName)+5);
sprintf(fenckeyName,"%s.knc",tabName);
if ((fenckey=fopen(fenckeyName,"a+"))==NULL){
fprintf(stderr,"Cannot open file %s\n",fenckeyName);
return -1;
}
char *line;
line=malloc(sizeof(char));
sprintf(line,"");
reorderCols(db,tabName,cols,vals,n);
hash = sha256(vals[primary]);
sqlInt = malloc(sizeof(char)*strlen(tabName)+strlen(hash)+36);
sprintf(sqlInt,"INSERT INTO %s_CRPT(ID) VALUES ('%s');",tabName,hash);
rc = sqlite3_exec(db,sqlInt,internal_callback,0,errmsg);
if(rc != SQLITE_OK ){
goto EXIT_INSERT;
}
for(int i=0;i<n;i++){
line=realloc(line,strlen(line)+strlen(vals[i])+2);
strcat(line,vals[i]);
strcat(line," ");
}
if(SetUp->l!=n){
*errmsg = malloc(sizeof(char)*50);
sprintf(*errmsg,"Invalid number of column");
rc = SQLITE_ERROR;
goto EXIT_INSERT;
}
//rc = writeKRowDb(pairingstr,SetUp,line,cols,SetUp->l,db,tabName,fkey,fenckey);
writeKRow(pairingstr,SetUp,line,SetUp->l,fout,fkey,fenckey);
EXIT_INSERT:
free(fmpkName);
free(fenckeyName);
free(fkeyName);
free(hash);
free(sqlInt);
return rc;
}
int eSqlite3_addToken(
char *pairingstr, /* pairing filename */
char **tokensFile, /*list of tokens filename*/
Akey_t ***tokens, /*list of open token*/
int n, /*number of open token*/
int size /*size of tokens filename list*/
)
{
pairing_t *pairing = load_pairing(pairingstr);
Akey_t **toReturn;
if(!n){
*tokens = malloc(sizeof(Akey_t*)*size);
}
else
*tokens = realloc(*tokens,sizeof(Akey_t*)*(size+n+1));
for(int i = 0; i < size; i++){
FILE *fp;
if ((fp=fopen(tokensFile[i],"r"))==NULL){
fprintf(stderr,"Cannot open file %s\n",tokensFile);
return -1;
}
(*tokens)[i+n]=readAkey(pairing, fp);
fclose(fp);
}
// *tokens=toReturn;
return size+n;
}
void setP(char a){
char p=a;
}
int eSqlite3_select(
eSqlite3 *db,
char *sql,
char *pairingFile,
Akey_t **tokens,
int (*callback)(void*,int,char**,char**), /* Callback function */
int size
)
{
char *tabName,**cols,**vals, *fkeyName, *finName,*check, **results,**azColName;
FILE *fkey, *fin;
int posVal,n,posToDecrypt,argc;
char *line=NULL;
pairing_t *pairing = load_pairing(pairingFile);
results=malloc(sizeof(char*));
azColName=malloc(sizeof(char*));
/* for(int k=0;k<10;k++)
results = malloc(sizeof(char)*100);*/
cols = malloc(sizeof(char*));
vals = malloc(sizeof(char*));
check = malloc(sizeof(char));
sprintf(check,"");
extractDataSql(sql,&tabName,&cols,&vals,&posVal,&n);
finName=malloc(strlen(tabName)+5);
fkeyName=malloc(strlen(tabName)+5);
sprintf(finName,"%s.hve",tabName);
if ((fin=fopen(finName,"r"))==NULL){
fprintf(stderr,"%s: cannot open file %s\n",tabName,finName);
return -1;
}
sprintf(fkeyName,"%s.knc",tabName);
if ((fkey=fopen(fkeyName,"r"))==NULL){
fprintf(stderr,"%s: cannot open file %s\n",tabName,fkeyName);
return -1;
}
free(finName);
free(fkeyName);
for(int i=posVal;i < n; i++){
check = realloc(check,sizeof(char)*strlen(cols[i])+strlen(vals[i-posVal])+2);
strcat(check,cols[i]);
strcat(check," ");
strcat(check,vals[i-posVal]);
strcat(check," ");
}
strcat(check,"\n");
argc = 0;
for(int j=0;j<posVal;j++){ //it could be better
posToDecrypt = getpos(db,tabName,cols[j]);
char *colName;
for( int i = 0;i < size; i++ ){
if((tokens[i]->n==posToDecrypt) && (strcmp(tokens[i]->cond,check)==0))
{
//decrypt
colName = malloc(sizeof(char)*strlen(cols[j]));
strcpy(colName,cols[j]);
int l=tokens[i]->l;
int n2=tokens[i]->n;
//read file of Ciphertexts
size_t len=0;
int linenumber=1;
while (getline(&line,&len,fin)!=-1){
//read l encrypted AES keys corresponding to the line
Act_t *EncAESKeys=readAct(pairing,fkey);
//decrypt using Token and obtain AES key for the n2-th string of the line
element_t *mOut=ASingdecrypt(pairing,EncAESKeys,tokens[i],n2);
char *ExtendedKey=malloc(MAXLengthByte);
element_to_bytes(ExtendedKey,*mOut);
unsigned char *AESKey=malloc(AESKeyLength/8);
memcpy(AESKey,ExtendedKey+1,AESKeyLength/8);
//get the ciphertexts
char **AESCt=parseLine(line,l);
//and decrypt the n2-th ciphertext
char *Pt=EncodedMACaesDec(AESCt[n2],AESKey);
#ifdef VERBOSE
printf("The ciphertext %s\n",AESCt[n2]);
#endif
if (Pt!=NULL)
//printf("nothing found in linenumber %d\n",linenumber);
{
azColName = realloc(azColName,sizeof(char*)*(argc+1));
azColName[argc] = colName;
results = realloc(results,sizeof(char*)*(argc+1));
results[argc] = malloc(sizeof(char)*strlen(Pt)+1);
strcpy(results[argc],Pt);
//argv[argc-1] = Pt;
argc++;
#ifdef VERBOSE
element_printf("The random element\n%B\n",*mOut);
printf("The raw key ");
for(int k=0;i<AESKeyLength/8;k++) printf(" %02X",AESKey[k]);
printf("\n");
#endif
}
#ifdef VERBOSE
printf("\n");
#endif
linenumber++;
free(ExtendedKey);
free(AESKey);
free(line);
len=0;
}
fseek(fin,SEEK_SET,0);
fseek(fkey,SEEK_SET,0);
}
}
}
callback(NULL,argc,results,azColName);
fclose(fin); fclose(fkey);
return SQLITE_OK;
}