mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-08-17 19:09:56 +00:00
581 lines
16 KiB
Objective-C
581 lines
16 KiB
Objective-C
/*
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* This is the source code of Telegram for iOS v. 1.1
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* It is licensed under GNU GPL v. 2 or later.
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* You should have received a copy of the license in this archive (see LICENSE).
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*
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* Copyright Peter Iakovlev, 2013.
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*/
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#import <MTProtoKit/MTEncryption.h>
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#import <MTProtoKit/MTLogging.h>
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#import <MTProtoKit/MTKeychain.h>
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#import <CommonCrypto/CommonCrypto.h>
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#import <CommonCrypto/CommonDigest.h>
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/bn.h>
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#include <openssl/pem.h>
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#include <openssl/err.h>
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#include <openssl/sha.h>
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#include <openssl/evp.h>
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#include <openssl/aes.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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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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#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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static inline uint64_t rotl64 ( uint64_t x, int8_t r )
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{
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return (x << r) | (x >> (64 - 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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AES_KEY aesKey;
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AES_set_encrypt_key(key.bytes, 256, &aesKey);
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unsigned char aesIv[AES_BLOCK_SIZE * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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AES_ige_encrypt(data.bytes, (void *)data.bytes, data.length, &aesKey, aesIv, true);
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}
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void MTAesEncryptInplaceAndModifyIv(NSMutableData *data, NSData *key, NSMutableData *iv)
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{
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AES_KEY aesKey;
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AES_set_encrypt_key(key.bytes, 256, &aesKey);
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AES_ige_encrypt(data.bytes, (void *)data.bytes, data.length, &aesKey, iv.mutableBytes, true);
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}
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void MTAesDecryptInplace(NSMutableData *data, NSData *key, NSData *iv)
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{
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AES_KEY aesKey;
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AES_set_decrypt_key(key.bytes, 256, &aesKey);
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unsigned char aesIv[AES_BLOCK_SIZE * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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AES_ige_encrypt(data.bytes, (void *)data.bytes, data.length, &aesKey, aesIv, false);
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}
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void MTAesDecryptInplaceAndModifyIv(NSMutableData *data, NSData *key, NSMutableData *iv)
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{
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AES_KEY aesKey;
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AES_set_decrypt_key(key.bytes, 256, &aesKey);
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AES_ige_encrypt(data.bytes, (void *)data.bytes, data.length, &aesKey, iv.mutableBytes, false);
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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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MTLog(@"***** MTAesEncrypt: empty key or iv");
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return nil;
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}
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AES_KEY aesKey;
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AES_set_encrypt_key(key.bytes, 256, &aesKey);
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unsigned char aesIv[AES_BLOCK_SIZE * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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uint8_t *resultBytes = malloc(data.length);
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AES_ige_encrypt(data.bytes, resultBytes, data.length, &aesKey, aesIv, true);
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return [[NSData alloc] initWithBytesNoCopy:resultBytes 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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MTLog(@"***** MTAesEncrypt: empty key or iv");
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return nil;
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}
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AES_KEY aesKey;
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AES_set_decrypt_key(key.bytes, 256, &aesKey);
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unsigned char aesIv[AES_BLOCK_SIZE * 2];
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memcpy(aesIv, iv.bytes, iv.length);
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uint8_t *resultBytes = malloc(data.length);
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AES_ige_encrypt(data.bytes, resultBytes, data.length, &aesKey, aesIv, false);
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return [[NSData alloc] initWithBytesNoCopy:resultBytes length:data.length freeWhenDone:true];
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}
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NSData *MTRsaEncrypt(NSString *publicKey, NSData *data)
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{
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BIO *keyBio = BIO_new(BIO_s_mem());
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const char *keyData = [publicKey UTF8String];
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BIO_write(keyBio, keyData, (int)publicKey.length);
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RSA *rsaKey = PEM_read_bio_RSAPublicKey(keyBio, NULL, NULL, NULL);
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BIO_free(keyBio);
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BN_CTX *ctx = BN_CTX_new();
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BIGNUM *a = BN_bin2bn(data.bytes, (int)data.length, NULL);
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BIGNUM *r = BN_new();
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BN_mod_exp(r, a, rsaKey->e, rsaKey->n, ctx);
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unsigned char *res = malloc((size_t)BN_num_bytes(r));
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int resLen = BN_bn2bin(r, res);
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BN_CTX_free(ctx);
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BN_free(a);
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BN_free(r);
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RSA_free(rsaKey);
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NSData *result = [[NSData alloc] initWithBytesNoCopy:res length:(NSUInteger)resLen freeWhenDone:true];
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return result;
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}
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NSData *MTExp(NSData *base, NSData *exp, NSData *modulus)
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{
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BN_CTX *ctx = BN_CTX_new();
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BIGNUM *bnBase = BN_bin2bn(base.bytes, (int)base.length, NULL);
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BIGNUM *bnExp = BN_bin2bn(exp.bytes, (int)exp.length, NULL);
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BIGNUM *bnModulus = BN_bin2bn(modulus.bytes, (int)modulus.length, NULL);
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BIGNUM *bnRes = BN_new();
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BN_mod_exp(bnRes, bnBase, bnExp, bnModulus, ctx);
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unsigned char *res = malloc((size_t)BN_num_bytes(bnRes));
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int resLen = BN_bn2bin(bnRes, res);
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BN_CTX_free(ctx);
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BN_free(bnBase);
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BN_free(bnExp);
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BN_free(bnModulus);
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BN_free(bnRes);
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NSData *result = [[NSData alloc] initWithBytes:res length:(NSUInteger)resLen];
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free(res);
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return result;
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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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MTLog(@"Factorization failed for %lld", (long long int)what);
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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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}
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static NSString *hexStringFromData(NSData *data)
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{
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NSMutableString *string = [[NSMutableString alloc] initWithCapacity:data.length * 2];
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for (NSUInteger i = 0; i < data.length; i++)
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{
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[string appendFormat:@"%02x", ((uint8_t *)data.bytes)[i]];
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}
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return string;
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}
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bool MTCheckIsSafePrime(NSData *numberBytes, MTKeychain *keychain)
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{
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NSString *primeKey = [[NSString alloc] initWithFormat:@"isPrimeSafe_%@", hexStringFromData(numberBytes)];
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NSNumber *nCachedResult = [keychain objectForKey:primeKey group:@"primes"];
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if (nCachedResult != nil)
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return [nCachedResult boolValue];
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if (numberBytes.length != 256)
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{
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[[NSUserDefaults standardUserDefaults] setObject:[[NSNumber alloc] initWithBool:false] forKey:primeKey];
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[[NSUserDefaults standardUserDefaults] synchronize];
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return false;
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}
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if (!(((uint8_t *)numberBytes.bytes)[0] & (1 << 7)))
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{
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[[NSUserDefaults standardUserDefaults] setObject:[[NSNumber alloc] initWithBool:false] forKey:primeKey];
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[[NSUserDefaults standardUserDefaults] synchronize];
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return false;
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}
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unsigned char goodPrime0[] = {
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0xc7, 0x1c, 0xae, 0xb9, 0xc6, 0xb1, 0xc9, 0x04, 0x8e, 0x6c, 0x52, 0x2f,
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0x70, 0xf1, 0x3f, 0x73, 0x98, 0x0d, 0x40, 0x23, 0x8e, 0x3e, 0x21, 0xc1,
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0x49, 0x34, 0xd0, 0x37, 0x56, 0x3d, 0x93, 0x0f, 0x48, 0x19, 0x8a, 0x0a,
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0xa7, 0xc1, 0x40, 0x58, 0x22, 0x94, 0x93, 0xd2, 0x25, 0x30, 0xf4, 0xdb,
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0xfa, 0x33, 0x6f, 0x6e, 0x0a, 0xc9, 0x25, 0x13, 0x95, 0x43, 0xae, 0xd4,
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0x4c, 0xce, 0x7c, 0x37, 0x20, 0xfd, 0x51, 0xf6, 0x94, 0x58, 0x70, 0x5a,
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0xc6, 0x8c, 0xd4, 0xfe, 0x6b, 0x6b, 0x13, 0xab, 0xdc, 0x97, 0x46, 0x51,
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0x29, 0x69, 0x32, 0x84, 0x54, 0xf1, 0x8f, 0xaf, 0x8c, 0x59, 0x5f, 0x64,
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0x24, 0x77, 0xfe, 0x96, 0xbb, 0x2a, 0x94, 0x1d, 0x5b, 0xcd, 0x1d, 0x4a,
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0xc8, 0xcc, 0x49, 0x88, 0x07, 0x08, 0xfa, 0x9b, 0x37, 0x8e, 0x3c, 0x4f,
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0x3a, 0x90, 0x60, 0xbe, 0xe6, 0x7c, 0xf9, 0xa4, 0xa4, 0xa6, 0x95, 0x81,
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0x10, 0x51, 0x90, 0x7e, 0x16, 0x27, 0x53, 0xb5, 0x6b, 0x0f, 0x6b, 0x41,
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0x0d, 0xba, 0x74, 0xd8, 0xa8, 0x4b, 0x2a, 0x14, 0xb3, 0x14, 0x4e, 0x0e,
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0xf1, 0x28, 0x47, 0x54, 0xfd, 0x17, 0xed, 0x95, 0x0d, 0x59, 0x65, 0xb4,
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0xb9, 0xdd, 0x46, 0x58, 0x2d, 0xb1, 0x17, 0x8d, 0x16, 0x9c, 0x6b, 0xc4,
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0x65, 0xb0, 0xd6, 0xff, 0x9c, 0xa3, 0x92, 0x8f, 0xef, 0x5b, 0x9a, 0xe4,
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0xe4, 0x18, 0xfc, 0x15, 0xe8, 0x3e, 0xbe, 0xa0, 0xf8, 0x7f, 0xa9, 0xff,
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0x5e, 0xed, 0x70, 0x05, 0x0d, 0xed, 0x28, 0x49, 0xf4, 0x7b, 0xf9, 0x59,
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0xd9, 0x56, 0x85, 0x0c, 0xe9, 0x29, 0x85, 0x1f, 0x0d, 0x81, 0x15, 0xf6,
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0x35, 0xb1, 0x05, 0xee, 0x2e, 0x4e, 0x15, 0xd0, 0x4b, 0x24, 0x54, 0xbf,
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0x6f, 0x4f, 0xad, 0xf0, 0x34, 0xb1, 0x04, 0x03, 0x11, 0x9c, 0xd8, 0xe3,
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0xb9, 0x2f, 0xcc, 0x5b
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};
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if (memcmp(goodPrime0, numberBytes.bytes, 256) == 0)
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return true;
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BN_CTX *ctx = BN_CTX_new();
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BIGNUM *bnNumber = BN_bin2bn(numberBytes.bytes, (int)numberBytes.length, NULL);
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int result = BN_is_prime_ex(bnNumber, 30, ctx, NULL);
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if (result == 1)
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{
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BIGNUM *bnNumberMinus1 = BN_new();
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BN_sub(bnNumberMinus1, bnNumber, BN_value_one());
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BIGNUM *bnNumberMinus1DivBy2 = BN_new();
|
|
BN_rshift1(bnNumberMinus1DivBy2, bnNumberMinus1);
|
|
|
|
result = BN_is_prime_ex(bnNumberMinus1DivBy2, 30, ctx, NULL);
|
|
|
|
BN_free(bnNumberMinus1);
|
|
BN_free(bnNumberMinus1DivBy2);
|
|
}
|
|
|
|
BN_free(bnNumber);
|
|
BN_CTX_free(ctx);
|
|
|
|
[keychain setObject:@(result == 1) forKey:primeKey group:@"primes"];
|
|
|
|
return result == 1;
|
|
}
|
|
|
|
bool MTCheckIsSafeGAOrB(NSData *gAOrB, NSData *p)
|
|
{
|
|
BN_CTX *ctx = BN_CTX_new();
|
|
BIGNUM *bnNumber = BN_bin2bn(gAOrB.bytes, (int)gAOrB.length, NULL);
|
|
BIGNUM *bnP = BN_bin2bn(p.bytes, (int)p.length, NULL);
|
|
|
|
bool result = false;
|
|
|
|
if (BN_cmp(bnNumber, BN_value_one()) == 1)
|
|
{
|
|
BIGNUM *pMinus1 = BN_new();
|
|
BN_sub(pMinus1, bnP, BN_value_one());
|
|
|
|
if (BN_cmp(bnNumber, pMinus1) == -1)
|
|
{
|
|
result = true;
|
|
}
|
|
|
|
BN_free(pMinus1);
|
|
}
|
|
|
|
BN_free(bnNumber);
|
|
BN_free(bnP);
|
|
BN_CTX_free(ctx);
|
|
|
|
return result;
|
|
}
|
|
|
|
bool MTCheckMod(NSData *numberBytes, unsigned int g, 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];
|
|
|
|
BN_CTX *ctx = BN_CTX_new();
|
|
BIGNUM *bnNumber = BN_bin2bn(numberBytes.bytes, (int)numberBytes.length, NULL);
|
|
|
|
bool result = false;
|
|
|
|
switch (g)
|
|
{
|
|
case 2:
|
|
{
|
|
BN_ULONG modResult = BN_mod_word(bnNumber, 8);
|
|
result = modResult == 7;
|
|
|
|
break;
|
|
}
|
|
case 3:
|
|
{
|
|
BN_ULONG modResult = BN_mod_word(bnNumber, 3);
|
|
result = modResult == 2;
|
|
|
|
break;
|
|
}
|
|
case 4:
|
|
{
|
|
result = true;
|
|
|
|
break;
|
|
}
|
|
case 5:
|
|
{
|
|
BN_ULONG modResult = BN_mod_word(bnNumber, 5);
|
|
result = modResult == 1 || modResult == 4;
|
|
|
|
break;
|
|
}
|
|
case 6:
|
|
{
|
|
BN_ULONG modResult = BN_mod_word(bnNumber, 24);
|
|
result = modResult == 19 || modResult == 23;
|
|
|
|
break;
|
|
}
|
|
case 7:
|
|
{
|
|
BN_ULONG modResult = BN_mod_word(bnNumber, 7);
|
|
result = modResult == 3 || modResult == 5 || modResult == 6;
|
|
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
BN_free(bnNumber);
|
|
BN_CTX_free(ctx);
|
|
|
|
[keychain setObject:@(result) forKey:modKey group:@"primes"];
|
|
|
|
return result;
|
|
}
|