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Peter
2016-09-06 01:32:43 +03:00
parent 086ce402b0
commit 952688d02c
1 changed files with 32 additions and 0 deletions
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32
MTProtoKit/MTEncryption.m
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@@ -20,6 +20,11 @@
#import "MTAes.h"
#import "MTRsa.h"
#if TARGET_OS_IOS
#else
# include <openssl/pem.h>
#endif
NSData *MTSha1(NSData *data)
{
uint8_t digest[20];
@@ -236,12 +241,39 @@ NSData *MTAesDecrypt(NSData *data, NSData *key, NSData *iv)
NSData *MTRsaEncrypt(NSString *publicKey, NSData *data)
{
#if TARGET_OS_IOS
NSMutableData *updatedData = [[NSMutableData alloc] initWithData:data];
while (updatedData.length < 256) {
uint8_t zero = 0;
[updatedData replaceBytesInRange:NSMakeRange(0, 0) withBytes:&zero length:1];
}
return [MTRsa encryptData:updatedData publicKey:publicKey];
#else
BIO *keyBio = BIO_new(BIO_s_mem());
const char *keyData = [publicKey UTF8String];
BIO_write(keyBio, keyData, (int)publicKey.length);
RSA *rsaKey = PEM_read_bio_RSAPublicKey(keyBio, NULL, NULL, NULL);
BIO_free(keyBio);
BN_CTX *ctx = BN_CTX_new();
BIGNUM *a = BN_bin2bn(data.bytes, (int)data.length, NULL);
BIGNUM *r = BN_new();
BN_mod_exp(r, a, rsaKey->e, rsaKey->n, ctx);
unsigned char *res = malloc((size_t)BN_num_bytes(r));
int resLen = BN_bn2bin(r, res);
BN_CTX_free(ctx);
BN_free(a);
BN_free(r);
RSA_free(rsaKey);
NSData *result = [[NSData alloc] initWithBytesNoCopy:res length:(NSUInteger)resLen freeWhenDone:true];
return result;
#endif
}
NSData *MTExp(NSData *base, NSData *exp, NSData *modulus)