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pkg2zip_zrif.c
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pkg2zip_zrif.c
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#include "pkg2zip_zrif.h"
#include "pkg2zip_utils.h"
#include "pkg2zip_sys.h"
#include "miniz_tdef.h"
#include "puff.h"
#include <assert.h>
#include <string.h>
#define ADLER32_MOD 65521
#define ZLIB_DEFLATE_METHOD 8
#define ZLIB_DICTIONARY_ID_ZRIF 0x627d1d5d
static const uint8_t zrif_dict[] =
{
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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 48, 48, 48, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 48, 48,
48, 48, 54, 48, 48, 48, 48, 55, 48, 48, 48, 48, 56, 0, 48, 48, 48, 48, 51, 48, 48, 48, 48, 52, 48, 48, 48, 48,
53, 48, 95, 48, 48, 45, 65, 68, 68, 67, 79, 78, 84, 48, 48, 48, 48, 50, 45, 80, 67, 83, 71, 48, 48, 48, 48,
48, 48, 48, 48, 48, 48, 49, 45, 80, 67, 83, 69, 48, 48, 48, 45, 80, 67, 83, 70, 48, 48, 48, 45, 80, 67, 83,
67, 48, 48, 48, 45, 80, 67, 83, 68, 48, 48, 48, 45, 80, 67, 83, 65, 48, 48, 48, 45, 80, 67, 83, 66, 48, 48,
48, 0, 1, 0, 1, 0, 1, 0, 2, 239, 205, 171, 137, 103, 69, 35, 1,
};
static const uint8_t b64d[] =
{
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
};
static uint32_t base64_decode(const char* in, uint8_t* out)
{
const uint8_t* out0 = out;
const uint8_t* in8 = (uint8_t*)in;
size_t len = strlen(in);
if (in[len - 1] == '=')
{
len--;
}
if (in[len - 1] == '=')
{
len--;
}
for (size_t i = 0; i < len / 4; i++)
{
*out++ = (b64d[in8[0]] << 2) + ((b64d[in8[1]] & 0x30) >> 4);
*out++ = (b64d[in8[1]] << 4) + (b64d[in8[2]] >> 2);
*out++ = (b64d[in8[2]] << 6) + b64d[in8[3]];
in8 += 4;
}
size_t left = len % 4;
if (left == 2)
{
*out++ = (b64d[in8[0]] << 2) + ((b64d[in8[1]] & 0x30) >> 4);
*out++ = (b64d[in8[1]] << 4);
}
else if (left == 3)
{
*out++ = (b64d[in8[0]] << 2) + ((b64d[in8[1]] & 0x30) >> 4);
*out++ = (b64d[in8[1]] << 4) + (b64d[in8[2]] >> 2);
*out++ = b64d[in8[2]] << 6;
}
return (uint32_t)(out - out0);
}
// https://www.ietf.org/rfc/rfc1950.txt
static uint32_t zlib_inflate(const uint8_t* in, uint32_t inlen, uint8_t* out, uint32_t outlen)
{
if (inlen < 2 + 4)
{
sys_error("ERROR: zRIF length too short\n");
}
if (((in[0] << 8) + in[1]) % 31 != 0)
{
sys_error("ERROR: zRIF header is corrupted\n");
}
if ((in[0] & 0xf) != ZLIB_DEFLATE_METHOD)
{
sys_error("ERROR: only deflate method supported in zRIF\n");
}
unsigned long slen = inlen - 4;
unsigned long dlen = outlen;
unsigned long dictlen = 0;
if (in[1] & (1 << 5))
{
assert(outlen > sizeof(zrif_dict));
memcpy(out, zrif_dict, sizeof(zrif_dict));
dictlen = sizeof(zrif_dict);
if (get32be(in + 2) != ZLIB_DICTIONARY_ID_ZRIF)
{
sys_error("ERROR: zRIF uses unknown dictionary\n");
}
in += 6;
slen -= 6;
}
else
{
in += 2;
slen -= 2;
}
if (puff(dictlen, out, &dlen, in, &slen) != 0)
{
sys_error("ERROR: failed to uncompress zRIF\n");
}
memmove(out, out + dictlen, dlen);
if (mz_adler32(MZ_ADLER32_INIT, out, dlen) != get32be(in + slen))
{
sys_error("ERROR: zRIF is corrupted, wrong checksum\n");
}
return dlen;
}
void zrif_decode(const char* str, uint8_t* rif, uint32_t rif_size)
{
uint8_t raw[1024];
uint32_t len = base64_decode(str, raw);
uint8_t out[sizeof(zrif_dict) + 1024];
len = zlib_inflate(raw, len, out, sizeof(out));
if (len != rif_size)
{
sys_error("ERROR: wrong size of zRIF, is it corrupted?\n");
}
memcpy(rif, out, rif_size);
}