sqlcipher/src/test_hexio.c at Xcode5 · securitykernel/sqlcipher · GitHub

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** 2007 April 6

** The author disclaims copyright to this source code. In place of

** a legal notice, here is a blessing:

** May you do good and not evil.

** May you find forgiveness for yourself and forgive others.

** May you share freely, never taking more than you give.

*************************************************************************

** Code for testing all sorts of SQLite interfaces. This code

** implements TCL commands for reading and writing the binary

** database files and displaying the content of those files as

** hexadecimal. We could, in theory, use the built-in "binary"

** command of TCL to do a lot of this, but there are some issues

** with historical versions of the "binary" command. So it seems

** easier and safer to build our own mechanism.

#include "sqliteInt.h"

#include "tcl.h"

#include <stdlib.h>

#include <string.h>

#include <assert.h>

** Convert binary to hex. The input zBuf[] contains N bytes of

** binary data. zBuf[] is 2*n+1 bytes long. Overwrite zBuf[]

** with a hexadecimal representation of its original binary input.

void sqlite3TestBinToHex(unsigned char *zBuf, int N){

const unsigned char zHex[] = "0123456789ABCDEF";

int i, j;

unsigned char c;

i = N*2;

zBuf[i--] = 0;

for(j=N-1; j>=0; j--){

c = zBuf[j];

zBuf[i--] = zHex[c&0xf];

zBuf[i--] = zHex[c>>4];

}

assert( i==-1 );

}

** Convert hex to binary. The input zIn[] contains N bytes of

** hexadecimal. Convert this into binary and write aOut[] with

** the binary data. Spaces in the original input are ignored.

** Return the number of bytes of binary rendered.

int sqlite3TestHexToBin(const unsigned char *zIn, int N, unsigned char *aOut){

const unsigned char aMap[] = {

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

1, 2, 3, 4, 5, 6, 7, 8, 9,10, 0, 0, 0, 0, 0, 0,

0,11,12,13,14,15,16, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0,11,12,13,14,15,16, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

};

int i, j;

int hi=1;

unsigned char c;

for(i=j=0; i<N; i++){

c = aMap[zIn[i]];

if( c==0 ) continue;

if( hi ){

aOut[j] = (c-1)<<4;

hi = 0;

}else{

aOut[j++] |= c-1;

hi = 1;

}

return j;

}

** Usage: hexio_read FILENAME OFFSET AMT

** Read AMT bytes from file FILENAME beginning at OFFSET from the

** beginning of the file. Convert that information to hexadecimal

** and return the resulting HEX string.

static int hexio_read(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int offset;

int amt, got;

const char *zFile;

unsigned char *zBuf;

FILE *in;

if( objc!=4 ){

Tcl_WrongNumArgs(interp, 1, objv, "FILENAME OFFSET AMT");

return TCL_ERROR;

}

if( Tcl_GetIntFromObj(interp, objv[2], &offset) ) return TCL_ERROR;

if( Tcl_GetIntFromObj(interp, objv[3], &amt) ) return TCL_ERROR;

zFile = Tcl_GetString(objv[1]);

zBuf = sqlite3_malloc( amt*2+1 );

if( zBuf==0 ){

return TCL_ERROR;

}

in = fopen(zFile, "rb");

if( in==0 ){

in = fopen(zFile, "r");

}

if( in==0 ){

Tcl_AppendResult(interp, "cannot open input file ", zFile, 0);

return TCL_ERROR;

}

fseek(in, offset, SEEK_SET);

got = (int)fread(zBuf, 1, amt, in);

fclose(in);

if( got<0 ){

got = 0;

}

sqlite3TestBinToHex(zBuf, got);

Tcl_AppendResult(interp, zBuf, 0);

sqlite3_free(zBuf);

return TCL_OK;

}

** Usage: hexio_write FILENAME OFFSET DATA

** Write DATA into file FILENAME beginning at OFFSET from the

** beginning of the file. DATA is expressed in hexadecimal.

static int hexio_write(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int offset;

int nIn, nOut, written;

const char *zFile;

const unsigned char *zIn;

unsigned char *aOut;

FILE *out;

if( objc!=4 ){

Tcl_WrongNumArgs(interp, 1, objv, "FILENAME OFFSET HEXDATA");

return TCL_ERROR;

}

if( Tcl_GetIntFromObj(interp, objv[2], &offset) ) return TCL_ERROR;

zFile = Tcl_GetString(objv[1]);

zIn = (const unsigned char *)Tcl_GetStringFromObj(objv[3], &nIn);

aOut = sqlite3_malloc( nIn/2 );

if( aOut==0 ){

return TCL_ERROR;

}

nOut = sqlite3TestHexToBin(zIn, nIn, aOut);

out = fopen(zFile, "r+b");

if( out==0 ){

out = fopen(zFile, "r+");

}

if( out==0 ){

Tcl_AppendResult(interp, "cannot open output file ", zFile, 0);

return TCL_ERROR;

}

fseek(out, offset, SEEK_SET);

written = (int)fwrite(aOut, 1, nOut, out);

sqlite3_free(aOut);

fclose(out);

Tcl_SetObjResult(interp, Tcl_NewIntObj(written));

return TCL_OK;

}

** USAGE: hexio_get_int HEXDATA

** Interpret the HEXDATA argument as a big-endian integer. Return

** the value of that integer. HEXDATA can contain between 2 and 8

** hexadecimal digits.

static int hexio_get_int(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int val;

int nIn, nOut;

const unsigned char *zIn;

unsigned char *aOut;

unsigned char aNum[4];

if( objc!=2 ){

Tcl_WrongNumArgs(interp, 1, objv, "HEXDATA");

return TCL_ERROR;

}

zIn = (const unsigned char *)Tcl_GetStringFromObj(objv[1], &nIn);

aOut = sqlite3_malloc( nIn/2 );

if( aOut==0 ){

return TCL_ERROR;

}

nOut = sqlite3TestHexToBin(zIn, nIn, aOut);

if( nOut>=4 ){

memcpy(aNum, aOut, 4);

}else{

memset(aNum, 0, sizeof(aNum));

memcpy(&aNum[4-nOut], aOut, nOut);

}

sqlite3_free(aOut);

val = (aNum[0]<<24) | (aNum[1]<<16) | (aNum[2]<<8) | aNum[3];

Tcl_SetObjResult(interp, Tcl_NewIntObj(val));

return TCL_OK;

}

** USAGE: hexio_render_int16 INTEGER

** Render INTEGER has a 16-bit big-endian integer in hexadecimal.

static int hexio_render_int16(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int val;

unsigned char aNum[10];

if( objc!=2 ){

Tcl_WrongNumArgs(interp, 1, objv, "INTEGER");

return TCL_ERROR;

}

if( Tcl_GetIntFromObj(interp, objv[1], &val) ) return TCL_ERROR;

aNum[0] = val>>8;

aNum[1] = val;

sqlite3TestBinToHex(aNum, 2);

Tcl_SetObjResult(interp, Tcl_NewStringObj((char*)aNum, 4));

return TCL_OK;

}

** USAGE: hexio_render_int32 INTEGER

** Render INTEGER has a 32-bit big-endian integer in hexadecimal.

static int hexio_render_int32(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int val;

unsigned char aNum[10];

if( objc!=2 ){

Tcl_WrongNumArgs(interp, 1, objv, "INTEGER");

return TCL_ERROR;

}

if( Tcl_GetIntFromObj(interp, objv[1], &val) ) return TCL_ERROR;

aNum[0] = val>>24;

aNum[1] = val>>16;

aNum[2] = val>>8;

aNum[3] = val;

sqlite3TestBinToHex(aNum, 4);

Tcl_SetObjResult(interp, Tcl_NewStringObj((char*)aNum, 8));

return TCL_OK;

}

** USAGE: utf8_to_utf8 HEX

** The argument is a UTF8 string represented in hexadecimal.

** The UTF8 might not be well-formed. Run this string through

** sqlite3Utf8to8() convert it back to hex and return the result.

static int utf8_to_utf8(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

#ifdef SQLITE_DEBUG

int n;

int nOut;

const unsigned char *zOrig;

unsigned char *z;

if( objc!=2 ){

Tcl_WrongNumArgs(interp, 1, objv, "HEX");

return TCL_ERROR;

}

zOrig = (unsigned char *)Tcl_GetStringFromObj(objv[1], &n);

z = sqlite3_malloc( n+3 );

n = sqlite3TestHexToBin(zOrig, n, z);

z[n] = 0;

nOut = sqlite3Utf8To8(z);

sqlite3TestBinToHex(z,nOut);

Tcl_AppendResult(interp, (char*)z, 0);

sqlite3_free(z);

return TCL_OK;

#else

Tcl_AppendResult(interp,

"[utf8_to_utf8] unavailable - SQLITE_DEBUG not defined", 0

);

return TCL_ERROR;

#endif

}

static int getFts3Varint(const char *p, sqlite_int64 *v){

const unsigned char *q = (const unsigned char *) p;

sqlite_uint64 x = 0, y = 1;

while( (*q & 0x80) == 0x80 ){

x += y * (*q++ & 0x7f);

y <<= 7;

}

x += y * (*q++);

*v = (sqlite_int64) x;

return (int) (q - (unsigned char *)p);

}

** USAGE: read_fts3varint BLOB VARNAME

** Read a varint from the start of BLOB. Set variable VARNAME to contain

** the interpreted value. Return the number of bytes of BLOB consumed.

static int read_fts3varint(

void * clientData,

Tcl_Interp *interp,

int objc,

Tcl_Obj *CONST objv[]

){

int nBlob;

unsigned char *zBlob;

sqlite3_int64 iVal;

int nVal;

if( objc!=3 ){

Tcl_WrongNumArgs(interp, 1, objv, "BLOB VARNAME");

return TCL_ERROR;

}

zBlob = Tcl_GetByteArrayFromObj(objv[1], &nBlob);

nVal = getFts3Varint((char*)zBlob, (sqlite3_int64 *)(&iVal));

Tcl_ObjSetVar2(interp, objv[2], 0, Tcl_NewWideIntObj(iVal), 0);

Tcl_SetObjResult(interp, Tcl_NewIntObj(nVal));

return TCL_OK;

}

** Register commands with the TCL interpreter.

int Sqlitetest_hexio_Init(Tcl_Interp *interp){

static struct {

char *zName;

Tcl_ObjCmdProc *xProc;

} aObjCmd[] = {

{ "hexio_read", hexio_read },

{ "hexio_write", hexio_write },

{ "hexio_get_int", hexio_get_int },

{ "hexio_render_int16", hexio_render_int16 },

{ "hexio_render_int32", hexio_render_int32 },

{ "utf8_to_utf8", utf8_to_utf8 },

{ "read_fts3varint", read_fts3varint },

};

int i;

for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){

Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0);

}

return TCL_OK;

}

sqlcipher/src/test_hexio.c at Xcode5 · securitykernel/sqlcipher · GitHub

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