Add sha256 to String and File/FileAccess.

Probably does #4166
This commit is contained in:
Bojidar Marinov 2016-06-17 10:55:16 +03:00
parent 367aabf030
commit 7073bb0bb2
No known key found for this signature in database
GPG Key ID: 4B0FD31949AD430D
10 changed files with 366 additions and 7 deletions

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@ -1558,6 +1558,12 @@ String _File::get_md5(const String& p_path) const {
}
String _File::get_sha256(const String& p_path) const {
return FileAccess::get_sha256(p_path);
}
String _File::get_line() const{
@ -1748,6 +1754,7 @@ void _File::_bind_methods() {
ObjectTypeDB::bind_method(_MD("get_line"),&_File::get_line);
ObjectTypeDB::bind_method(_MD("get_as_text"),&_File::get_as_text);
ObjectTypeDB::bind_method(_MD("get_md5","path"),&_File::get_md5);
ObjectTypeDB::bind_method(_MD("get_sha256","path"),&_File::get_md5);
ObjectTypeDB::bind_method(_MD("get_endian_swap"),&_File::get_endian_swap);
ObjectTypeDB::bind_method(_MD("set_endian_swap","enable"),&_File::set_endian_swap);
ObjectTypeDB::bind_method(_MD("get_error:Error"),&_File::get_error);

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@ -380,6 +380,7 @@ public:
String get_line() const;
String get_as_text() const;
String get_md5(const String& p_path) const;
String get_sha256(const String& p_path) const;
/**< use this for files WRITTEN in _big_ endian machines (ie, amiga/mac)
* It's not about the current CPU type but file formats.

5
core/io/sha-README.md Normal file
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@ -0,0 +1,5 @@
SHA256
======
SHA-256 implementation to compliment a portable byte-oriented AES-256
implementation in C at http://www.literatecode.com/aes256

245
core/io/sha256.c Normal file
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@ -0,0 +1,245 @@
/*
* SHA-256 implementation.
*
* Copyright (c) 2010 Ilya O. Levin, http://www.literatecode.com
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define SWAP_BYTES
// #define USE_STD_MEMCPY
// #define SELF_TEST
#ifdef USE_STD_MEMCPY
#include <string.h>
#endif
#include "sha256.h"
#ifdef __cplusplus
extern "C" {
#endif
#define RL(x,n) (((x) << n) | ((x) >> (32 - n)))
#define RR(x,n) (((x) >> n) | ((x) << (32 - n)))
#define S0(x) (RR((x), 2) ^ RR((x),13) ^ RR((x),22))
#define S1(x) (RR((x), 6) ^ RR((x),11) ^ RR((x),25))
#define G0(x) (RR((x), 7) ^ RR((x),18) ^ ((x) >> 3))
#define G1(x) (RR((x),17) ^ RR((x),19) ^ ((x) >> 10))
#ifdef SWAP_BYTES
#define BSWP(x,y) _bswapw((uint32_t *)(x), (uint32_t)(y))
#else
#define BSWP(p,n)
#endif
#ifdef USE_STD_MEMCPY
#define MEMCP(x,y,z) memcpy((x),(y),(z))
#else
#define MEMCP(x,y,z) _memcp((x),(y),(z))
#endif
#ifndef __cdecl
#define __cdecl
#endif
static const uint32_t K[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
};
/* -------------------------------------------------------------------------- */
static void _bswapw(uint32_t *p, uint32_t i)
{
while (i--) p[i] = (RR(p[i],24) & 0x00ff00ff) | (RR(p[i],8) & 0xff00ff00);
} /* _bswapw */
/* -------------------------------------------------------------------------- */
#ifndef USE_STD_MEMCPY
void * __cdecl _memcp (void *d, const void *s, uint32_t sz)
{
void *rv = d;
while (sz--) *(char *)d = *(char *)s, d = (char *)d + 1, s = (char *)s + 1;
return(rv);
} /* _memcp */
#endif
/* -------------------------------------------------------------------------- */
static void _rtrf(uint32_t *b, uint32_t *p, uint32_t i, uint32_t j)
{
#define B(x, y) b[(x-y) & 7]
#define P(x, y) p[(x+y) & 15]
B(7,i) += (j ? (p[i & 15] += G1(P(i,14)) + P(i,9) + G0(P(i,1))) : p[i & 15])
+ K[i+j] + S1(B(4,i))
+ (B(6,i) ^ (B(4,i) & (B(5,i) ^ B(6,i))));
B(3,i) += B(7,i);
B(7,i) += S0(B(0,i)) + ( (B(0,i) & B(1,i)) | (B(2,i) & (B(0,i) ^ B(1,i))) );
#undef P
#undef B
} /* _rtrf */
/* -------------------------------------------------------------------------- */
static void _hash(sha256_context *ctx)
{
uint32_t b[8], *p, j;
b[0] = ctx->hash[0]; b[1] = ctx->hash[1]; b[2] = ctx->hash[2];
b[3] = ctx->hash[3]; b[4] = ctx->hash[4]; b[5] = ctx->hash[5];
b[6] = ctx->hash[6]; b[7] = ctx->hash[7];
for (p = ctx->buf, j = 0; j < 64; j += 16)
_rtrf(b, p, 0, j), _rtrf(b, p, 1, j), _rtrf(b, p, 2, j),
_rtrf(b, p, 3, j), _rtrf(b, p, 4, j), _rtrf(b, p, 5, j),
_rtrf(b, p, 6, j), _rtrf(b, p, 7, j), _rtrf(b, p, 8, j),
_rtrf(b, p, 9, j), _rtrf(b, p, 10, j), _rtrf(b, p, 11, j),
_rtrf(b, p, 12, j), _rtrf(b, p, 13, j), _rtrf(b, p, 14, j),
_rtrf(b, p, 15, j);
ctx->hash[0] += b[0]; ctx->hash[1] += b[1]; ctx->hash[2] += b[2];
ctx->hash[3] += b[3]; ctx->hash[4] += b[4]; ctx->hash[5] += b[5];
ctx->hash[6] += b[6]; ctx->hash[7] += b[7];
} /* _hash */
/* -------------------------------------------------------------------------- */
void sha256_init(sha256_context ctx[1])
{
ctx->len[0] = ctx->len[1] = 0;
ctx->hash[0] = 0x6a09e667; ctx->hash[1] = 0xbb67ae85;
ctx->hash[2] = 0x3c6ef372; ctx->hash[3] = 0xa54ff53a;
ctx->hash[4] = 0x510e527f; ctx->hash[5] = 0x9b05688c;
ctx->hash[6] = 0x1f83d9ab; ctx->hash[7] = 0x5be0cd19;
} /* sha256_init */
/* -------------------------------------------------------------------------- */
void sha256_hash(sha256_context *ctx, uint8_t *dat, uint32_t sz)
{
register uint32_t i = ctx->len[0] & 63, l, j;
if ((ctx->len[0] += sz) < sz) ++(ctx->len[1]);
for (j = 0, l = 64-i; sz >= l; j += l, sz -= l, l = 64, i = 0)
{
MEMCP(&ctx->buf[i], &dat[j], l);
BSWP(ctx->buf, 16 );
_hash(ctx);
}
MEMCP(&ctx->buf[i], &dat[j], sz);
} /* _hash */
/* -------------------------------------------------------------------------- */
void sha256_done(sha256_context *ctx, uint8_t *buf)
{
uint32_t i = (uint32_t)(ctx->len[0] & 63), j = ((~i) & 3) << 3;
BSWP(ctx->buf, (i + 3) >> 2);
ctx->buf[i >> 2] &= 0xffffff80 << j; /* add padding */
ctx->buf[i >> 2] |= 0x00000080 << j;
if (i < 56) i = (i >> 2) + 1;
else ctx->buf[15] ^= (i < 60) ? ctx->buf[15] : 0, _hash(ctx), i = 0;
while (i < 14) ctx->buf[i++] = 0;
ctx->buf[14] = (ctx->len[1] << 3)|(ctx->len[0] >> 29); /* add length */
ctx->buf[15] = ctx->len[0] << 3;
_hash(ctx);
for (i = 0; i < 32; i++)
ctx->buf[i % 16] = 0, /* may remove this line in case of a DIY cleanup */
buf[i] = (uint8_t)(ctx->hash[i >> 2] >> ((~i & 3) << 3));
} /* sha256_done */
#ifdef SELF_TEST
#pragma warning (push, 0)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#pragma warning(pop)
char *buf[] = {
"",
"e3b0c442 98fc1c14 9afbf4c8 996fb924 27ae41e4 649b934c a495991b 7852b855",
"abc",
"ba7816bf 8f01cfea 414140de 5dae2223 b00361a3 96177a9c b410ff61 f20015ad",
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"248d6a61 d20638b8 e5c02693 0c3e6039 a33ce459 64ff2167 f6ecedd4 19db06c1",
"The quick brown fox jumps over the lazy dog",
"d7a8fbb3 07d78094 69ca9abc b0082e4f 8d5651e4 6d3cdb76 2d02d0bf 37c9e592",
"The quick brown fox jumps over the lazy cog", /* avalanche effect test */
"e4c4d8f3 bf76b692 de791a17 3e053211 50f7a345 b46484fe 427f6acc 7ecc81be",
"bhn5bjmoniertqea40wro2upyflkydsibsk8ylkmgbvwi420t44cq034eou1szc1k0mk46oeb7ktzmlxqkbte2sy",
"9085df2f 02e0cc45 5928d0f5 1b27b4bf 1d9cd260 a66ed1fd a11b0a3f f5756d99"
};
int main(int argc, char *argv[])
{
sha256_context ctx;
uint8_t hv[32];
uint32_t i, j;
for (j = 0; j < (sizeof(buf)/sizeof(buf[0])); j += 2)
{
sha256_init(&ctx);
sha256_hash(&ctx, (uint8_t *)buf[j], (uint32_t)strlen(buf[j]));
sha256_done(&ctx, hv);
printf("input = %s\ndigest: %s\nresult: ", buf[j], buf[j+1]);
for (i = 0; i < 32; i++) printf("%02x%s", hv[i], ((i%4)==3)?" ":"");
printf("\n\n");
}
for (j = 1; j < (uint32_t)argc; j++)
{
printf("argv[%d]: %s\nresult: ", (int)j, argv[j]);
sha256_init(&ctx);
sha256_hash(&ctx, (uint8_t *)argv[j], (uint32_t)strlen(argv[j]));
sha256_done(&ctx, hv);
for (i = 0; i < 32; i++) printf("%02x%s", hv[i], ((i%4)==3)?" ":"");
printf("\n\n");
}
return 0;
} /* main */
#endif
#ifdef __cplusplus
}
#endif

50
core/io/sha256.h Normal file
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@ -0,0 +1,50 @@
/*
* SHA-256 implementation.
*
* Copyright (c) 2010 Ilya O. Levin, http://www.literatecode.com
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef _MSC_VER
#ifndef uint8_t
typedef unsigned __int8 uint8_t;
#endif
#ifndef uint32_t
typedef unsigned __int32 uint32_t;
#endif
#ifndef uint64_t
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
#endif
#else
#include <stdint.h>
#endif
#ifdef __cplusplus
extern "C"
{
#endif
typedef struct {
uint32_t buf[16];
uint32_t hash[8];
uint32_t len[2];
} sha256_context;
void sha256_init(sha256_context *);
void sha256_hash(sha256_context *, uint8_t * /* data */, uint32_t /* len */);
void sha256_done(sha256_context *, uint8_t * /* hash */);
#ifdef __cplusplus
}
#endif

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@ -31,6 +31,7 @@
#include "os/os.h"
#include "core/io/marshalls.h"
#include "io/md5.h"
#include "io/sha256.h"
#include "core/io/file_access_pack.h"
FileAccess::CreateFunc FileAccess::create_func[ACCESS_MAX]={0,0};
@ -517,6 +518,38 @@ String FileAccess::get_md5(const String& p_file) {
}
String FileAccess::get_sha256(const String& p_file) {
FileAccess *f=FileAccess::open(p_file,READ);
if (!f)
return String();
sha256_context sha256;
sha256_init(&sha256);
unsigned char step[32768];
while(true) {
int br = f->get_buffer(step,32768);
if (br>0) {
sha256_hash(&sha256,step,br);
}
if (br < 4096)
break;
}
unsigned char hash[32];
sha256_done(&sha256, hash);
memdelete(f);
return String::hex_encode_buffer(hash, 32);
}
FileAccess::FileAccess() {
endian_swap=false;

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@ -153,6 +153,7 @@ public:
static bool is_backup_save_enabled() { return backup_save; };
static String get_md5(const String& p_file);
static String get_sha256(const String& p_file);
static Vector<uint8_t> get_file_as_array(const String& p_path);

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@ -32,6 +32,7 @@
#include "print_string.h"
#include "math_funcs.h"
#include "io/md5.h"
#include "io/sha256.h"
#include "ucaps.h"
#include "color.h"
#include "variant.h"
@ -849,21 +850,23 @@ const CharType * String::c_str() const {
}
String String::md5(const uint8_t *p_md5) {
return String::hex_encode_buffer(p_md5, 16);
}
String String::hex_encode_buffer(const uint8_t *p_buffer, int p_len) {
static const char hex[16]={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
String ret;
char v[2]={0,0};
for(int i=0;i<16;i++) {
static const char hex[16]={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
char v[2]={0,0};
v[0]=hex[p_md5[i]>>4];
for(int i=0;i<p_len;i++) {
v[0]=hex[p_buffer[i]>>4];
ret+=v;
v[0]=hex[p_md5[i]&0xF];
v[0]=hex[p_buffer[i]&0xF];
ret+=v;
}
return ret;
}
String String::chr(CharType p_char) {
@ -2389,6 +2392,16 @@ String String::md5_text() const {
return String::md5(ctx.digest);
}
String String::sha256_text() const {
CharString cs=utf8();
unsigned char hash[32];
sha256_context ctx;
sha256_init(&ctx);
sha256_hash(&ctx,(unsigned char*)cs.ptr(),cs.length());
sha256_done(&ctx, hash);
return String::hex_encode_buffer(hash, 32);
}
Vector<uint8_t> String::md5_buffer() const {
CharString cs=utf8();

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@ -140,6 +140,7 @@ public:
static String num_int64(int64_t p_num,int base=10,bool capitalize_hex=false);
static String chr(CharType p_char);
static String md5(const uint8_t *p_md5);
static String hex_encode_buffer(const uint8_t *p_buffer, int p_len);
bool is_numeric() const;
double to_double() const;
float to_float() const;
@ -193,6 +194,7 @@ public:
uint32_t hash() const; /* hash the string */
uint64_t hash64() const; /* hash the string */
String md5_text() const;
String sha256_text() const;
Vector<uint8_t> md5_buffer() const;
inline bool empty() const { return length() == 0; }

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@ -267,6 +267,7 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var
VCALL_LOCALMEM2(String,erase);
VCALL_LOCALMEM0R(String,hash);
VCALL_LOCALMEM0R(String,md5_text);
VCALL_LOCALMEM0R(String,sha256_text);
VCALL_LOCALMEM0R(String,md5_buffer);
VCALL_LOCALMEM0R(String,empty);
VCALL_LOCALMEM0R(String,is_abs_path);
@ -1294,6 +1295,7 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl
ADDFUNC2(STRING,NIL,String,erase,INT,"pos",INT,"chars", varray());
ADDFUNC0(STRING,INT,String,hash,varray());
ADDFUNC0(STRING,STRING,String,md5_text,varray());
ADDFUNC0(STRING,STRING,String,sha256_text,varray());
ADDFUNC0(STRING,RAW_ARRAY,String,md5_buffer,varray());
ADDFUNC0(STRING,BOOL,String,empty,varray());
ADDFUNC0(STRING,BOOL,String,is_abs_path,varray());