mirror of
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1016 lines
32 KiB
Objective-C
1016 lines
32 KiB
Objective-C
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#import "MTEncryption.h"
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#import "MTLogging.h"
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#import "MTKeychain.h"
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#import <CommonCrypto/CommonCrypto.h>
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#import <CommonCrypto/CommonDigest.h>
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#import <EncryptionProvider/EncryptionProvider.h>
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#import "MTAes.h"
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#import "MTRsa.h"
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#import "MTBuffer.h"
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#import "MTBufferReader.h"
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NSData *MTSha1(NSData *data)
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{
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uint8_t digest[20];
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CC_SHA1(data.bytes, (CC_LONG)data.length, digest);
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return [[NSData alloc] initWithBytes:digest length:20];
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}
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NSData *MTSubdataSha1(NSData *data, NSUInteger offset, NSUInteger length)
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{
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uint8_t digest[20];
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CC_SHA1(((uint8_t *)data.bytes) + offset, (CC_LONG)length, digest);
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return [[NSData alloc] initWithBytes:digest length:20];
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}
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void MTRawSha1(void const *inData, NSUInteger length, void *outData)
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{
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CC_SHA1(inData, (CC_LONG)length, outData);
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}
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NSData *MTSha256(NSData *data)
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{
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uint8_t digest[CC_SHA256_DIGEST_LENGTH];
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CC_SHA256(data.bytes, (CC_LONG)data.length, digest);
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return [[NSData alloc] initWithBytes:digest length:CC_SHA256_DIGEST_LENGTH];
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}
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void MTRawSha256(void const *inData, NSUInteger length, void *outData)
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{
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CC_SHA256(inData, (CC_LONG)length, outData);
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}
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#if defined(_MSC_VER)
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#define FORCE_INLINE __forceinline
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#include <stdlib.h>
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#define ROTL32(x,y) _rotl(x,y)
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#define ROTL64(x,y) _rotl64(x,y)
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#define BIG_CONSTANT(x) (x)
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// Other compilers
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#else // defined(_MSC_VER)
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#define FORCE_INLINE __attribute__((always_inline))
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static inline uint32_t rotl32 ( uint32_t x, int8_t r )
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{
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return (x << r) | (x >> (32 - r));
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}
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#define ROTL32(x,y) rotl32(x,y)
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#define ROTL64(x,y) rotl64(x,y)
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#define BIG_CONSTANT(x) (x##LLU)
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#endif // !defined(_MSC_VER)
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//-----------------------------------------------------------------------------
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// Block read - if your platform needs to do endian-swapping or can only
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// handle aligned reads, do the conversion here
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static FORCE_INLINE uint32_t getblock ( const uint32_t * p, int i )
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{
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return p[i];
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}
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//-----------------------------------------------------------------------------
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// Finalization mix - force all bits of a hash block to avalanche
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static FORCE_INLINE uint32_t fmix ( uint32_t h )
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{
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h ^= h >> 16;
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h *= 0x85ebca6b;
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h ^= h >> 13;
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h *= 0xc2b2ae35;
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h ^= h >> 16;
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return h;
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}
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//----------
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static void MurmurHash3_x86_32 ( const void * key, int len,
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uint32_t seed, void * out )
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{
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const uint8_t * data = (const uint8_t*)key;
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const int nblocks = len / 4;
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uint32_t h1 = seed;
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const uint32_t c1 = 0xcc9e2d51;
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const uint32_t c2 = 0x1b873593;
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//----------
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// body
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const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
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for(int i = -nblocks; i; i++)
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{
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uint32_t k1 = getblock(blocks,i);
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k1 *= c1;
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k1 = ROTL32(k1,15);
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k1 *= c2;
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h1 ^= k1;
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h1 = ROTL32(h1,13);
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h1 = h1*5+0xe6546b64;
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}
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//----------
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// tail
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const uint8_t * tail = (const uint8_t*)(data + nblocks*4);
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uint32_t k1 = 0;
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switch(len & 3)
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{
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case 3: k1 ^= tail[2] << 16;
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case 2: k1 ^= tail[1] << 8;
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case 1: k1 ^= tail[0];
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k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
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};
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//----------
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// finalization
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h1 ^= len;
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h1 = fmix(h1);
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*(uint32_t*)out = h1;
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}
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int32_t MTMurMurHash32(const void *bytes, int length)
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{
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int32_t result = 0;
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MurmurHash3_x86_32(bytes, length, -137723950, &result);
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return result;
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}
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void MTAesEncryptInplace(NSMutableData *data, NSData *key, NSData *iv)
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{
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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void *outData = malloc(data.length);
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MyAesIgeEncrypt(data.bytes, (int)data.length, outData, key.bytes, (int)key.length, aesIv);
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memcpy(data.mutableBytes, outData, data.length);
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free(outData);
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}
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void MTAesEncryptInplaceAndModifyIv(NSMutableData *data, NSData *key, NSMutableData *iv)
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{
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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void *outData = malloc(data.length);
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MyAesIgeEncrypt(data.bytes, (int)data.length, outData, key.bytes, (int)key.length, aesIv);
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memcpy(data.mutableBytes, outData, data.length);
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free(outData);
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memcpy(iv.mutableBytes, aesIv, 16 * 2);
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}
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void MTAesEncryptBytesInplaceAndModifyIv(void *data, NSInteger length, NSData *key, void *iv) {
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unsigned char aesIv[32];
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memcpy(aesIv, iv, 32);
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void *outData = malloc(length);
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MyAesIgeEncrypt(data, (int)length, outData, key.bytes, (int)key.length, aesIv);
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memcpy(data, outData, length);
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free(outData);
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memcpy(iv, aesIv, 32);
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}
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void MTAesEncryptRaw(void const *data, void *outData, NSInteger length, void const *key, void const *iv) {
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unsigned char aesIv[32];
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memcpy(aesIv, iv, 32);
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MyAesIgeEncrypt(data, (int)length, outData, key, 32, aesIv);
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}
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void MTAesDecryptRaw(void const *data, void *outData, NSInteger length, void const *key, void const *iv) {
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unsigned char aesIv[32];
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memcpy(aesIv, iv, 32);
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MyAesIgeDecrypt(data, (int)length, outData, key, 32, aesIv);
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}
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void MTAesDecryptInplaceAndModifyIv(NSMutableData *data, NSData *key, NSMutableData *iv)
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{
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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void *outData = malloc(data.length);
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MyAesIgeDecrypt(data.bytes, (int)data.length, outData, key.bytes, (int)key.length, aesIv);
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memcpy(data.mutableBytes, outData, data.length);
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free(outData);
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memcpy(iv.mutableBytes, aesIv, 16 * 2);
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}
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void MTAesDecryptBytesInplaceAndModifyIv(void *data, NSInteger length, NSData *key, void *iv) {
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv, 16 * 2);
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void *outData = malloc(length);
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MyAesIgeDecrypt(data, (int)length, outData, key.bytes, (int)key.length, aesIv);
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memcpy(data, outData, length);
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free(outData);
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memcpy(iv, aesIv, 16 * 2);
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}
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void MTAesDecryptRawInplaceAndModifyIv(void *data, NSInteger length, void *key, void *iv) {
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv, 16 * 2);
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void *outData = malloc(length);
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MyAesIgeDecrypt(data, (int)length, outData, key, 32, aesIv);
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memcpy(data, outData, length);
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free(outData);
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memcpy(iv, aesIv, 16 * 2);
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}
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NSData *MTAesEncrypt(NSData *data, NSData *key, NSData *iv)
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{
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if (key == nil || iv == nil)
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{
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if (MTLogEnabled()) {
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MTLog(@"***** MTAesEncrypt: empty key or iv");
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}
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return nil;
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}
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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void *outData = malloc(data.length);
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MyAesIgeEncrypt(data.bytes, (int)data.length, outData, key.bytes, (int)key.length, aesIv);
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return [[NSData alloc] initWithBytesNoCopy:outData length:data.length freeWhenDone:true];
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}
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NSData *MTAesDecrypt(NSData *data, NSData *key, NSData *iv)
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{
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if (key == nil || iv == nil)
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{
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if (MTLogEnabled()) {
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MTLog(@"***** MTAesEncrypt: empty key or iv");
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}
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return nil;
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}
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NSMutableData *resultData = [[NSMutableData alloc] initWithLength:data.length];
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unsigned char aesIv[16 * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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MyAesIgeDecrypt(data.bytes, (int)data.length, resultData.mutableBytes, key.bytes, (int)key.length, aesIv);
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return resultData;
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}
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NSData *MTRsaEncrypt(id<EncryptionProvider> provider, NSString *publicKey, NSData *data)
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{
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#if TARGET_OS_IOS
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NSMutableData *updatedData = [[NSMutableData alloc] initWithData:data];
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while (updatedData.length < 256) {
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uint8_t zero = 0;
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[updatedData replaceBytesInRange:NSMakeRange(0, 0) withBytes:&zero length:1];
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}
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return [MTRsa encryptData:updatedData publicKey:publicKey];
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#else
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return [provider macosRSAEncrypt:publicKey data:data];
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#endif
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}
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NSData *MTExp(id<EncryptionProvider> provider, NSData *base, NSData *exp, NSData *modulus)
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{
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnBase = [context create];
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[context assignBinTo:bnBase value:base];
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[context setConstantTime:bnBase];
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id<MTBignum> bnExp = [context create];
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[context assignBinTo:bnExp value:exp];
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[context setConstantTime:bnExp];
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id<MTBignum> bnModulus = [context create];
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[context assignBinTo:bnModulus value:modulus];
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[context setConstantTime:bnModulus];
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id<MTBignum> bnRes = [context create];
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[context setConstantTime:bnRes];
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[context modExpInto:bnRes a:bnBase b:bnExp mod:bnModulus];
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NSData *result = [context getBin:bnRes];
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return result;
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}
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NSData *MTModSub(id<EncryptionProvider> provider, NSData *a, NSData *b, NSData *modulus) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnA = [context create];
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[context assignBinTo:bnA value:a];
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id<MTBignum> bnB = [context create];
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[context assignBinTo:bnB value:b];
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id<MTBignum> bnModulus = [context create];
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[context assignBinTo:bnModulus value:modulus];
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id<MTBignum> bnRes = [context create];
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[context modSubInto:bnRes a:bnA b:bnB mod:bnModulus];
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return [context getBin:bnRes];
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}
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NSData *MTModMul(id<EncryptionProvider> provider, NSData *a, NSData *b, NSData *modulus) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnA = [context create];
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[context assignBinTo:bnA value:a];
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id<MTBignum> bnB = [context create];
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[context assignBinTo:bnB value:b];
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id<MTBignum> bnModulus = [context create];
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[context assignBinTo:bnModulus value:modulus];
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id<MTBignum> bnRes = [context create];
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[context modMulInto:bnRes a:bnA b:bnB mod:bnModulus];
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return [context getBin:bnRes];
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}
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NSData *MTMul(id<EncryptionProvider> provider, NSData *a, NSData *b) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnA = [context create];
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[context assignBinTo:bnA value:a];
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id<MTBignum> bnB = [context create];
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[context assignBinTo:bnB value:b];
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id<MTBignum> bnRes = [context create];
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[context mulInto:bnRes a:bnA b:bnB];
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return [context getBin:bnRes];
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}
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NSData *MTAdd(id<EncryptionProvider> provider, NSData *a, NSData *b) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnA = [context create];
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[context assignBinTo:bnA value:a];
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id<MTBignum> bnB = [context create];
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[context assignBinTo:bnB value:b];
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id<MTBignum> bnRes = [context create];
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[context addInto:bnRes a:bnA b:bnB];
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return [context getBin:bnRes];
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}
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bool MTIsZero(id<EncryptionProvider> provider, NSData *value) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnA = [context create];
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[context assignBinTo:bnA value:value];
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return [context isZero:bnA];
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}
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bool MTCheckIsSafeB(id<EncryptionProvider> provider, NSData *b, NSData *p) {
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id<MTBignumContext> context = [provider createBignumContext];
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id<MTBignum> bnB = [context create];
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[context assignBinTo:bnB value:b];
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id<MTBignum> bnP = [context create];
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[context assignBinTo:bnP value:p];
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id<MTBignum> bnZero = [context create];
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[context assignZeroTo:bnZero];
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return [context compare:bnB with:bnZero] == 1 && [context compare:bnB with:bnP] == -1;
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}
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static inline uint64_t mygcd(uint64_t a, uint64_t b)
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{
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while (a != 0 && b != 0)
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{
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while ((b & 1) == 0)
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{
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b >>= 1;
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}
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while ((a & 1) == 0)
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{
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a >>= 1;
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}
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if (a > b)
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a -= b;
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else
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b -= a;
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}
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return b == 0 ? a : b;
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}
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bool MTFactorize(uint64_t what, uint64_t *resA, uint64_t *resB)
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{
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int it = 0;
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uint64_t g = 0;
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for (int i = 0; i < 3 || it < 1000; i++)
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{
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int q = ((lrand48() & 15) + 17) % what;
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uint64_t x = (uint64_t)lrand48 () % (what - 1) + 1, y = x;
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int lim = 1 << (i + 18);
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int j;
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for (j = 1; j < lim; j++)
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{
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++it;
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unsigned long long a = x, b = x, c = (unsigned long long)q;
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while (b)
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{
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if (b & 1)
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{
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c += a;
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if (c >= what)
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{
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c -= what;
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}
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}
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a += a;
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if (a >= what)
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{
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a -= what;
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}
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b >>= 1;
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}
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x = c;
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unsigned long long z = x < y ? what + x - y : x - y;
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g = mygcd(z, what);
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if (g != 1)
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{
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break;
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}
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if (!(j & (j - 1)))
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{
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y = x;
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}
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}
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if (g > 1 && g < what)
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break;
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}
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if (g > 1 && g < what)
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{
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uint64_t p1 = g;
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uint64_t p2 = what / g;
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if (p1 > p2)
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{
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uint64_t tmp = p1;
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p1 = p2;
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p2 = tmp;
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}
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if (resA != NULL)
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*resA = p1;
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if (resB != NULL)
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*resB = p2;
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return true;
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}
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else
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{
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if (MTLogEnabled()) {
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MTLog(@"Factorization failed for %lld", (long long int)what);
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}
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return false;
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}
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}
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bool MTCheckIsSafeG(unsigned int g)
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{
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return g >= 2 && g <= 7;
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|
}
|
|
|
|
static NSString *hexStringFromData(NSData *data)
|
|
{
|
|
NSMutableString *string = [[NSMutableString alloc] initWithCapacity:data.length * 2];
|
|
for (NSUInteger i = 0; i < data.length; i++)
|
|
{
|
|
[string appendFormat:@"%02x", ((uint8_t *)data.bytes)[i]];
|
|
}
|
|
return string;
|
|
}
|
|
|
|
bool MTCheckIsSafePrime(id<EncryptionProvider> provider, NSData *numberBytes, id<MTKeychain> keychain)
|
|
{
|
|
NSString *primeKey = [[NSString alloc] initWithFormat:@"isPrimeSafe_%@", hexStringFromData(numberBytes)];
|
|
|
|
NSNumber *nCachedResult = [keychain objectForKey:primeKey group:@"primes"];
|
|
if (nCachedResult != nil) {
|
|
return [nCachedResult boolValue];
|
|
}
|
|
|
|
if (numberBytes.length != 256) {
|
|
return false;
|
|
}
|
|
|
|
if (!(((uint8_t *)numberBytes.bytes)[0] & (1 << 7))) {
|
|
return false;
|
|
}
|
|
|
|
unsigned char goodPrime0[] = {
|
|
0xc7, 0x1c, 0xae, 0xb9, 0xc6, 0xb1, 0xc9, 0x04, 0x8e, 0x6c, 0x52, 0x2f,
|
|
0x70, 0xf1, 0x3f, 0x73, 0x98, 0x0d, 0x40, 0x23, 0x8e, 0x3e, 0x21, 0xc1,
|
|
0x49, 0x34, 0xd0, 0x37, 0x56, 0x3d, 0x93, 0x0f, 0x48, 0x19, 0x8a, 0x0a,
|
|
0xa7, 0xc1, 0x40, 0x58, 0x22, 0x94, 0x93, 0xd2, 0x25, 0x30, 0xf4, 0xdb,
|
|
0xfa, 0x33, 0x6f, 0x6e, 0x0a, 0xc9, 0x25, 0x13, 0x95, 0x43, 0xae, 0xd4,
|
|
0x4c, 0xce, 0x7c, 0x37, 0x20, 0xfd, 0x51, 0xf6, 0x94, 0x58, 0x70, 0x5a,
|
|
0xc6, 0x8c, 0xd4, 0xfe, 0x6b, 0x6b, 0x13, 0xab, 0xdc, 0x97, 0x46, 0x51,
|
|
0x29, 0x69, 0x32, 0x84, 0x54, 0xf1, 0x8f, 0xaf, 0x8c, 0x59, 0x5f, 0x64,
|
|
0x24, 0x77, 0xfe, 0x96, 0xbb, 0x2a, 0x94, 0x1d, 0x5b, 0xcd, 0x1d, 0x4a,
|
|
0xc8, 0xcc, 0x49, 0x88, 0x07, 0x08, 0xfa, 0x9b, 0x37, 0x8e, 0x3c, 0x4f,
|
|
0x3a, 0x90, 0x60, 0xbe, 0xe6, 0x7c, 0xf9, 0xa4, 0xa4, 0xa6, 0x95, 0x81,
|
|
0x10, 0x51, 0x90, 0x7e, 0x16, 0x27, 0x53, 0xb5, 0x6b, 0x0f, 0x6b, 0x41,
|
|
0x0d, 0xba, 0x74, 0xd8, 0xa8, 0x4b, 0x2a, 0x14, 0xb3, 0x14, 0x4e, 0x0e,
|
|
0xf1, 0x28, 0x47, 0x54, 0xfd, 0x17, 0xed, 0x95, 0x0d, 0x59, 0x65, 0xb4,
|
|
0xb9, 0xdd, 0x46, 0x58, 0x2d, 0xb1, 0x17, 0x8d, 0x16, 0x9c, 0x6b, 0xc4,
|
|
0x65, 0xb0, 0xd6, 0xff, 0x9c, 0xa3, 0x92, 0x8f, 0xef, 0x5b, 0x9a, 0xe4,
|
|
0xe4, 0x18, 0xfc, 0x15, 0xe8, 0x3e, 0xbe, 0xa0, 0xf8, 0x7f, 0xa9, 0xff,
|
|
0x5e, 0xed, 0x70, 0x05, 0x0d, 0xed, 0x28, 0x49, 0xf4, 0x7b, 0xf9, 0x59,
|
|
0xd9, 0x56, 0x85, 0x0c, 0xe9, 0x29, 0x85, 0x1f, 0x0d, 0x81, 0x15, 0xf6,
|
|
0x35, 0xb1, 0x05, 0xee, 0x2e, 0x4e, 0x15, 0xd0, 0x4b, 0x24, 0x54, 0xbf,
|
|
0x6f, 0x4f, 0xad, 0xf0, 0x34, 0xb1, 0x04, 0x03, 0x11, 0x9c, 0xd8, 0xe3,
|
|
0xb9, 0x2f, 0xcc, 0x5b
|
|
};
|
|
|
|
if (memcmp(goodPrime0, numberBytes.bytes, 256) == 0) {
|
|
return true;
|
|
}
|
|
|
|
id<MTBignumContext> context = [provider createBignumContext];
|
|
|
|
id<MTBignum> bnNumber = [context create];
|
|
[context assignBinTo:bnNumber value:numberBytes];
|
|
|
|
int result = [context isPrime:bnNumber numberOfChecks:30];
|
|
|
|
if (result == 1) {
|
|
id<MTBignum> bnNumberOne = [context create];
|
|
[context assignOneTo:bnNumberOne];
|
|
|
|
id<MTBignum> bnNumberMinusOne = [context create];
|
|
[context subInto:bnNumberMinusOne a:bnNumber b:bnNumberOne];
|
|
|
|
id<MTBignum> bnNumberMinusOneDivByTwo = [context create];
|
|
[context rightShift1Bit:bnNumberMinusOneDivByTwo a:bnNumberMinusOne];
|
|
|
|
int result = [context isPrime:bnNumberMinusOneDivByTwo numberOfChecks:30];
|
|
}
|
|
|
|
[keychain setObject:@(result == 1) forKey:primeKey group:@"primes"];
|
|
|
|
return result == 1;
|
|
}
|
|
|
|
bool MTCheckIsSafeGAOrB(id<EncryptionProvider> provider, NSData *gAOrB, NSData *p) {
|
|
id<MTBignumContext> context = [provider createBignumContext];
|
|
|
|
id<MTBignum> bnNumber = [context create];
|
|
[context assignBinTo:bnNumber value:gAOrB];
|
|
|
|
id<MTBignum> bnP = [context create];
|
|
[context assignBinTo:bnP value:p];
|
|
|
|
id<MTBignum> bnOne = [context create];
|
|
[context assignOneTo:bnOne];
|
|
|
|
bool result = false;
|
|
|
|
if ([context compare:bnNumber with:bnOne] == 1) {
|
|
id<MTBignum> bnPMinusOne = [context create];
|
|
[context subInto:bnPMinusOne a:bnP b:bnOne];
|
|
|
|
if ([context compare:bnNumber with:bnPMinusOne] == -1) {
|
|
result = true;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
bool MTCheckMod(id<EncryptionProvider> provider, NSData *numberBytes, unsigned int g, id<MTKeychain> keychain)
|
|
{
|
|
NSString *modKey = [[NSString alloc] initWithFormat:@"isPrimeModSafe_%@_%d", hexStringFromData(numberBytes), g];
|
|
NSNumber *nCachedResult = [keychain objectForKey:modKey group:@"primes"];
|
|
if (nCachedResult != nil) {
|
|
return [nCachedResult boolValue];
|
|
}
|
|
|
|
id<MTBignumContext> context = [provider createBignumContext];
|
|
|
|
id<MTBignum> bnNumber = [context create];
|
|
[context assignBinTo:bnNumber value:numberBytes];
|
|
|
|
bool result = false;
|
|
|
|
switch (g) {
|
|
case 2: {
|
|
unsigned long modResult = [context modWord:bnNumber mod:8];
|
|
result = modResult == 7;
|
|
|
|
break;
|
|
}
|
|
case 3: {
|
|
unsigned long modResult = [context modWord:bnNumber mod:3];
|
|
result = modResult == 2;
|
|
|
|
break;
|
|
}
|
|
case 4: {
|
|
result = true;
|
|
|
|
break;
|
|
}
|
|
case 5: {
|
|
unsigned long modResult = [context modWord:bnNumber mod:5];
|
|
result = modResult == 1 || modResult == 4;
|
|
|
|
break;
|
|
}
|
|
case 6: {
|
|
unsigned long modResult = [context modWord:bnNumber mod:24];
|
|
result = modResult == 19 || modResult == 23;
|
|
|
|
break;
|
|
}
|
|
case 7: {
|
|
unsigned long modResult = [context modWord:bnNumber mod:7];
|
|
result = modResult == 3 || modResult == 5 || modResult == 6;
|
|
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
[keychain setObject:@(result) forKey:modKey group:@"primes"];
|
|
|
|
return result;
|
|
}
|
|
|
|
NSData *MTAesCtrDecrypt(NSData *data, NSData *key, NSData *iv) {
|
|
MTAesCtr *ctr = [[MTAesCtr alloc] initWithKey:key.bytes keyLength:32 iv:iv.bytes decrypt:true];
|
|
NSMutableData *outData = [[NSMutableData alloc] initWithLength:data.length];
|
|
[ctr encryptIn:data.bytes out:outData.mutableBytes len:data.length];
|
|
return outData;
|
|
}
|
|
|
|
uint64_t MTRsaFingerprint(id<EncryptionProvider> provider, NSString *key) {
|
|
id<MTBignumContext> context = [provider createBignumContext];
|
|
id<MTRsaPublicKey> rsaKey = [provider parseRSAPublicKey:key];
|
|
if (rsaKey == nil) {
|
|
return 0;
|
|
}
|
|
|
|
id<MTBignum> rsaKeyN = [context rsaGetN:rsaKey];
|
|
id<MTBignum> rsaKeyE = [context rsaGetE:rsaKey];
|
|
|
|
NSData *nData = [context getBin:rsaKeyN];
|
|
NSData *eData = [context getBin:rsaKeyE];
|
|
|
|
MTBuffer *buffer = [[MTBuffer alloc] init];
|
|
[buffer appendTLBytes:nData];
|
|
[buffer appendTLBytes:eData];
|
|
|
|
NSData *sha1Data = MTSha1(buffer.data);
|
|
static uint8_t sha1Buffer[20];
|
|
[sha1Data getBytes:sha1Buffer length:20];
|
|
|
|
uint64_t fingerprint = (((uint64_t) sha1Buffer[19]) << 56) |
|
|
(((uint64_t) sha1Buffer[18]) << 48) |
|
|
(((uint64_t) sha1Buffer[17]) << 40) |
|
|
(((uint64_t) sha1Buffer[16]) << 32) |
|
|
(((uint64_t) sha1Buffer[15]) << 24) |
|
|
(((uint64_t) sha1Buffer[14]) << 16) |
|
|
(((uint64_t) sha1Buffer[13]) << 8) |
|
|
((uint64_t) sha1Buffer[12]);
|
|
|
|
return fingerprint;
|
|
}
|
|
|
|
NSData *MTRsaEncryptPKCS1OAEP(id<EncryptionProvider> provider, NSString *key, NSData *data) {
|
|
return [provider rsaEncryptPKCS1OAEPWithPublicKey:key data:data];
|
|
}
|
|
|
|
static NSData *decrypt_TL_data(id<EncryptionProvider> provider, unsigned char buffer[256]) {
|
|
NSString *keyString = @"-----BEGIN RSA PUBLIC KEY-----\n"
|
|
"MIIBCgKCAQEAyr+18Rex2ohtVy8sroGPBwXD3DOoKCSpjDqYoXgCqB7ioln4eDCF\n"
|
|
"fOBUlfXUEvM/fnKCpF46VkAftlb4VuPDeQSS/ZxZYEGqHaywlroVnXHIjgqoxiAd\n"
|
|
"192xRGreuXIaUKmkwlM9JID9WS2jUsTpzQ91L8MEPLJ/4zrBwZua8W5fECwCCh2c\n"
|
|
"9G5IzzBm+otMS/YKwmR1olzRCyEkyAEjXWqBI9Ftv5eG8m0VkBzOG655WIYdyV0H\n"
|
|
"fDK/NWcvGqa0w/nriMD6mDjKOryamw0OP9QuYgMN0C9xMW9y8SmP4h92OAWodTYg\n"
|
|
"Y1hZCxdv6cs5UnW9+PWvS+WIbkh+GaWYxwIDAQAB\n"
|
|
"-----END RSA PUBLIC KEY-----";
|
|
|
|
id<MTRsaPublicKey> rsaKey = [provider parseRSAPublicKey:keyString];
|
|
if (rsaKey == nil) {
|
|
return nil;
|
|
}
|
|
|
|
uint8_t *bytes = buffer;
|
|
|
|
id<MTBignumContext> context = [provider createBignumContext];
|
|
|
|
id<MTBignum> x = [context create];
|
|
id<MTBignum> y = [context create];
|
|
|
|
[context assignBinTo:x value:[NSData dataWithBytesNoCopy:buffer length:256 freeWhenDone:false]];
|
|
|
|
id<MTBignum> rsaKeyN = [context rsaGetN:rsaKey];
|
|
id<MTBignum> rsaKeyE = [context rsaGetE:rsaKey];
|
|
|
|
NSData *result = nil;
|
|
|
|
if ([context modExpInto:y a:x b:rsaKeyE mod:rsaKeyN]) {
|
|
NSData *yBytes = [context getBin:y];
|
|
unsigned l = 256 - (unsigned)yBytes.length;
|
|
memset(bytes, 0, l);
|
|
|
|
[yBytes getBytes:bytes + l length:256 - l];
|
|
|
|
NSMutableData *iv = [[NSMutableData alloc] initWithLength:16];
|
|
memcpy(iv.mutableBytes, bytes + 16, 16);
|
|
|
|
NSData *encryptedBytes = [[NSData alloc] initWithBytes:bytes + 32 length:256 - 32];
|
|
|
|
NSData *keyBytes = [[NSData alloc] initWithBytes:bytes length:32];
|
|
|
|
NSMutableData *decryptedBytes = [[NSMutableData alloc] initWithLength:encryptedBytes.length];
|
|
MyAesCbcDecrypt(encryptedBytes.bytes, encryptedBytes.length, decryptedBytes.mutableBytes, keyBytes.bytes, keyBytes.length, iv.mutableBytes);
|
|
|
|
if (decryptedBytes == nil) {
|
|
return nil;
|
|
}
|
|
|
|
NSData *sha256Bytes = MTSha256([decryptedBytes subdataWithRange:NSMakeRange(0, 256 - 32 - 16)]);
|
|
|
|
unsigned char sha256_out[32];
|
|
[sha256Bytes getBytes:sha256_out length:32];
|
|
|
|
NSData *sha256Part = [sha256Bytes subdataWithRange:NSMakeRange(0, 16)];
|
|
NSData *testSha256 = [decryptedBytes subdataWithRange:NSMakeRange(decryptedBytes.length - 16, 16)];
|
|
|
|
if ([sha256Part isEqualToData:testSha256]) {
|
|
memcpy(bytes + 32, decryptedBytes.bytes, 256 - 32);
|
|
|
|
unsigned data_len = *(unsigned *) (bytes + 32);
|
|
if (data_len && data_len <= 256 - 32 - 16 && !(data_len & 3)) {
|
|
result = [NSData dataWithBytes:buffer + 32 + 4 length:data_len];
|
|
} else {
|
|
if (MTLogEnabled()) {
|
|
MTLog(@"TL data length field invalid - %d", data_len);
|
|
}
|
|
}
|
|
} else {
|
|
if (MTLogEnabled()) {
|
|
MTLog(@"RSA signature check FAILED (SHA256 mismatch)");
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
@implementation MTBackupDatacenterAddress
|
|
|
|
- (instancetype)initWithDatacenterId:(int32_t)datacenterId ip:(NSString *)ip port:(int32_t)port secret:(NSData *)secret {
|
|
self = [super init];
|
|
if (self != nil) {
|
|
_datacenterId = datacenterId;
|
|
_ip = ip;
|
|
_port = port;
|
|
_secret = secret;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation MTBackupDatacenterData
|
|
|
|
- (instancetype)initWithTimestamp:(int32_t)timestamp expirationDate:(int32_t)expirationDate addressList:(NSArray<MTBackupDatacenterAddress *> *)addressList {
|
|
self = [super init];
|
|
if (self != nil) {
|
|
_timestamp = timestamp;
|
|
_expirationDate = expirationDate;
|
|
_addressList = addressList;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
@end
|
|
|
|
MTBackupDatacenterData *MTIPDataDecode(id<EncryptionProvider> provider, NSData *data, NSString *phoneNumber) {
|
|
if (data.length < 256) {
|
|
return nil;
|
|
}
|
|
unsigned char buffer[256];
|
|
memcpy(buffer, data.bytes, 256);
|
|
NSData *result = decrypt_TL_data(provider, buffer);
|
|
|
|
if (result != nil) {
|
|
MTBufferReader *reader = [[MTBufferReader alloc] initWithData:result];
|
|
int32_t signature = 0;
|
|
if (![reader readInt32:&signature]) {
|
|
return nil;
|
|
}
|
|
if (signature == 0xd997c3c5) {
|
|
int32_t timestamp = 0;
|
|
int32_t expirationDate = 0;
|
|
int32_t datacenterId = 0;
|
|
if (![reader readInt32:×tamp]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&expirationDate]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&datacenterId]) {
|
|
return nil;
|
|
}
|
|
int32_t vectorSignature = 0;
|
|
if (![reader readInt32:&vectorSignature]) {
|
|
return nil;
|
|
}
|
|
if (vectorSignature != 0x1cb5c415) {
|
|
return nil;
|
|
}
|
|
|
|
NSMutableArray<MTBackupDatacenterAddress *> *addressList = [[NSMutableArray alloc] init];
|
|
int32_t count = 0;
|
|
if (![reader readInt32:&count]) {
|
|
return nil;
|
|
}
|
|
|
|
for (int i = 0; i < count; i++) {
|
|
int32_t ip = 0;
|
|
int32_t port = 0;
|
|
if (![reader readInt32:&ip]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&port]) {
|
|
return nil;
|
|
}
|
|
[addressList addObject:[[MTBackupDatacenterAddress alloc] initWithDatacenterId:datacenterId ip:[NSString stringWithFormat:@"%d.%d.%d.%d", (int)((ip >> 24) & 0xFF), (int)((ip >> 16) & 0xFF), (int)((ip >> 8) & 0xFF), (int)((ip >> 0) & 0xFF)] port:port secret:nil]];
|
|
}
|
|
|
|
return [[MTBackupDatacenterData alloc] initWithTimestamp:timestamp expirationDate:expirationDate addressList:addressList];
|
|
} else if (signature == 0x5a592a6c) {
|
|
int32_t timestamp = 0;
|
|
int32_t expirationDate = 0;
|
|
if (![reader readInt32:×tamp]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&expirationDate]) {
|
|
return nil;
|
|
}
|
|
|
|
NSMutableArray<MTBackupDatacenterAddress *> *addressList = [[NSMutableArray alloc] init];
|
|
int32_t count = 0;
|
|
if (![reader readInt32:&count]) {
|
|
return nil;
|
|
}
|
|
|
|
for (int32_t i = 0; i < count; i++) {
|
|
int32_t signature = 0;
|
|
if (![reader readInt32:&signature]) {
|
|
return nil;
|
|
}
|
|
if (signature != 0x4679b65f) {
|
|
return nil;
|
|
}
|
|
NSString *phonePrefixRules = nil;
|
|
if (![reader readTLString:&phonePrefixRules]) {
|
|
return nil;
|
|
}
|
|
int32_t datacenterId = 0;
|
|
if (![reader readInt32:&datacenterId]) {
|
|
return nil;
|
|
}
|
|
|
|
int32_t ipCount = 0;
|
|
if (![reader readInt32:&ipCount]) {
|
|
return nil;
|
|
}
|
|
|
|
NSMutableArray<MTBackupDatacenterAddress *> *ruleAddressList = [[NSMutableArray alloc] init];
|
|
|
|
for (int j = 0; j < ipCount; j++) {
|
|
int32_t signature = 0;
|
|
if (![reader readInt32:&signature]) {
|
|
return nil;
|
|
}
|
|
if (signature == 0xd433ad73) {
|
|
int32_t ip = 0;
|
|
int32_t port = 0;
|
|
if (![reader readInt32:&ip]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&port]) {
|
|
return nil;
|
|
}
|
|
[ruleAddressList addObject:[[MTBackupDatacenterAddress alloc] initWithDatacenterId:datacenterId ip:[NSString stringWithFormat:@"%d.%d.%d.%d", (int)((ip >> 24) & 0xFF), (int)((ip >> 16) & 0xFF), (int)((ip >> 8) & 0xFF), (int)((ip >> 0) & 0xFF)] port:port secret:nil]];
|
|
} else if (signature == 0x37982646) {
|
|
int32_t ip = 0;
|
|
int32_t port = 0;
|
|
if (![reader readInt32:&ip]) {
|
|
return nil;
|
|
}
|
|
if (![reader readInt32:&port]) {
|
|
return nil;
|
|
}
|
|
NSData *secret = nil;
|
|
if (![reader readTLBytes:&secret]) {
|
|
return nil;
|
|
}
|
|
[ruleAddressList addObject:[[MTBackupDatacenterAddress alloc] initWithDatacenterId:datacenterId ip:[NSString stringWithFormat:@"%d.%d.%d.%d", (int)((ip >> 24) & 0xFF), (int)((ip >> 16) & 0xFF), (int)((ip >> 8) & 0xFF), (int)((ip >> 0) & 0xFF)] port:port secret:secret]];
|
|
} else {
|
|
return nil;
|
|
}
|
|
}
|
|
|
|
bool includeIp = true;
|
|
for (NSString *rule in [phonePrefixRules componentsSeparatedByString:@","]) {
|
|
if (rule.length == 0) {
|
|
includeIp = true;
|
|
} else if ([rule characterAtIndex:0] == '+' && [phoneNumber hasPrefix:[rule substringFromIndex:1]]) {
|
|
includeIp = true;
|
|
} else if ([rule characterAtIndex:0] == '-' && [phoneNumber hasPrefix:[rule substringFromIndex:1]]) {
|
|
includeIp = false;
|
|
} else {
|
|
includeIp = false;
|
|
}
|
|
}
|
|
if (includeIp) {
|
|
[addressList addObjectsFromArray:ruleAddressList];
|
|
}
|
|
}
|
|
|
|
return [[MTBackupDatacenterData alloc] initWithTimestamp:timestamp expirationDate:expirationDate addressList:addressList];
|
|
} else {
|
|
return nil;
|
|
}
|
|
} else {
|
|
return nil;
|
|
}
|
|
}
|
|
|
|
NSData * _Nullable MTPBKDF2(NSData * _Nonnull data, NSData * _Nonnull salt, int rounds) {
|
|
if (rounds < 2) {
|
|
return nil;
|
|
}
|
|
const size_t hashLength = 64;
|
|
NSMutableData *result = [[NSMutableData alloc] initWithLength:hashLength];
|
|
CCStatus status = CCKeyDerivationPBKDF(kCCPBKDF2, data.bytes, data.length, salt.bytes, salt.length, kCCPRFHmacAlgSHA512, rounds, result.mutableBytes, hashLength);
|
|
if (status != kCCSuccess) {
|
|
return nil;
|
|
}
|
|
return result;
|
|
}
|