目标C中的RSA实现
我在使用RSA Algorithm Objective-C中开发一个简单的应用程序。 我想在服务器/客户端通信上使用它。 我需要在iOS / iPhone的RSAalgorithm实现方面的帮助。
- 我有encryption和解密的知识。
- 我想要一个开源库或代码添加到我的项目。
- 我必须去
CommonCryptor.h。
我已经尝试了NSString的RSAencryption和解密。 这里是代码：
将Security.Framework添加到您的项目包中。
ViewController.h代码如下：
#import <UIKit/UIKit.h> #import <Security/Security.h> @interface ViewController : UIViewController { SecKeyRef publicKey; SecKeyRef privateKey; NSData *publicTag; NSData *privateTag; } - (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer; - (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer; - (SecKeyRef)getPublicKeyRef; - (SecKeyRef)getPrivateKeyRef; - (void)testAsymmetricEncryptionAndDecryption; - (void)generateKeyPair:(NSUInteger)keySize; @end
ViewController.m文件代码如下：
#import "ViewController.h" const size_t BUFFER_SIZE = 64; const size_t CIPHER_BUFFER_SIZE = 1024; const uint32_t PADDING = kSecPaddingNone; static const UInt8 publicKeyIdentifier[] = "com.apple.sample.publickey"; static const UInt8 privateKeyIdentifier[] = "com.apple.sample.privatekey"; @implementation ViewController -(SecKeyRef)getPublicKeyRef { OSStatus sanityCheck = noErr; SecKeyRef publicKeyReference = NULL; if (publicKeyReference == NULL) { [self generateKeyPair:512]; NSMutableDictionary *queryPublicKey = [[NSMutableDictionary alloc] init]; // Set the public key query dictionary. [queryPublicKey setObject:(__bridge id)kSecClassKey forKey:(__bridge id)kSecClass]; [queryPublicKey setObject:publicTag forKey:(__bridge id)kSecAttrApplicationTag]; [queryPublicKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [queryPublicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef]; // Get the key. sanityCheck = SecItemCopyMatching((__bridge CFDictionaryRef)queryPublicKey, (CFTypeRef *)&publicKeyReference); if (sanityCheck != noErr) { publicKeyReference = NULL; } // [queryPublicKey release]; } else { publicKeyReference = publicKey; } return publicKeyReference; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)testAsymmetricEncryptionAndDecryption { uint8_t *plainBuffer; uint8_t *cipherBuffer; uint8_t *decryptedBuffer; const char inputString[] = "This is a test demo for RSA Implementation in Objective C"; int len = strlen(inputString); // TODO: this is a hack since i know inputString length will be less than BUFFER_SIZE if (len > BUFFER_SIZE) len = BUFFER_SIZE-1; plainBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); cipherBuffer = (uint8_t *)calloc(CIPHER_BUFFER_SIZE, sizeof(uint8_t)); decryptedBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); strncpy( (char *)plainBuffer, inputString, len); NSLog(@"init() plainBuffer: %s", plainBuffer); //NSLog(@"init(): sizeof(plainBuffer): %d", sizeof(plainBuffer)); [self encryptWithPublicKey:(UInt8 *)plainBuffer cipherBuffer:cipherBuffer]; NSLog(@"encrypted data: %s", cipherBuffer); //NSLog(@"init(): sizeof(cipherBuffer): %d", sizeof(cipherBuffer)); [self decryptWithPrivateKey:cipherBuffer plainBuffer:decryptedBuffer]; NSLog(@"decrypted data: %s", decryptedBuffer); //NSLog(@"init(): sizeof(decryptedBuffer): %d", sizeof(decryptedBuffer)); NSLog(@"====== /second test ======================================="); free(plainBuffer); free(cipherBuffer); free(decryptedBuffer); } /* Borrowed from: * https://developer.apple.com/library/mac/#documentation/security/conceptual/CertKeyTrustProgGuide/iPhone_Tasks/iPhone_Tasks.html */ - (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer { NSLog(@"== encryptWithPublicKey()"); OSStatus status = noErr; NSLog(@"** original plain text 0: %s", plainBuffer); size_t plainBufferSize = strlen((char *)plainBuffer); size_t cipherBufferSize = CIPHER_BUFFER_SIZE; NSLog(@"SecKeyGetBlockSize() public = %lu", SecKeyGetBlockSize([self getPublicKeyRef])); // Error handling // Encrypt using the public. status = SecKeyEncrypt([self getPublicKeyRef], PADDING, plainBuffer, plainBufferSize, &cipherBuffer[0], &cipherBufferSize ); NSLog(@"encryption result code: %ld (size: %lu)", status, cipherBufferSize); NSLog(@"encrypted text: %s", cipherBuffer); } - (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer { OSStatus status = noErr; size_t cipherBufferSize = strlen((char *)cipherBuffer); NSLog(@"decryptWithPrivateKey: length of buffer: %lu", BUFFER_SIZE); NSLog(@"decryptWithPrivateKey: length of input: %lu", cipherBufferSize); // DECRYPTION size_t plainBufferSize = BUFFER_SIZE; // Error handling status = SecKeyDecrypt([self getPrivateKeyRef], PADDING, &cipherBuffer[0], cipherBufferSize, &plainBuffer[0], &plainBufferSize ); NSLog(@"decryption result code: %ld (size: %lu)", status, plainBufferSize); NSLog(@"FINAL decrypted text: %s", plainBuffer); } - (SecKeyRef)getPrivateKeyRef { OSStatus resultCode = noErr; SecKeyRef privateKeyReference = NULL; // NSData *privateTag = [NSData dataWithBytes:@"ABCD" length:strlen((const char *)@"ABCD")]; // if(privateKey == NULL) { [self generateKeyPair:512]; NSMutableDictionary * queryPrivateKey = [[NSMutableDictionary alloc] init]; // Set the private key query dictionary. [queryPrivateKey setObject:(__bridge id)kSecClassKey forKey:(__bridge id)kSecClass]; [queryPrivateKey setObject:privateTag forKey:(__bridge id)kSecAttrApplicationTag]; [queryPrivateKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [queryPrivateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef]; // Get the key. resultCode = SecItemCopyMatching((__bridge CFDictionaryRef)queryPrivateKey, (CFTypeRef *)&privateKeyReference); NSLog(@"getPrivateKey: result code: %ld", resultCode); if(resultCode != noErr) { privateKeyReference = NULL; } // [queryPrivateKey release]; // } else { // privateKeyReference = privateKey; // } return privateKeyReference; } #pragma mark - View lifecycle - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // eg self.myOutlet = nil; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; privateTag = [[NSData alloc] initWithBytes:privateKeyIdentifier length:sizeof(privateKeyIdentifier)]; publicTag = [[NSData alloc] initWithBytes:publicKeyIdentifier length:sizeof(publicKeyIdentifier)]; [self testAsymmetricEncryptionAndDecryption]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } else { return YES; } } - (void)generateKeyPair:(NSUInteger)keySize { OSStatus sanityCheck = noErr; publicKey = NULL; privateKey = NULL; // LOGGING_FACILITY1( keySize == 512 || keySize == 1024 || keySize == 2048, @"%d is an invalid and unsupported key size.", keySize ); // First delete current keys. // [self deleteAsymmetricKeys]; // Container dictionaries. NSMutableDictionary * privateKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * publicKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * keyPairAttr = [[NSMutableDictionary alloc] init]; // Set top level dictionary for the keypair. [keyPairAttr setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [keyPairAttr setObject:[NSNumber numberWithUnsignedInteger:keySize] forKey:(__bridge id)kSecAttrKeySizeInBits]; // Set the private key dictionary. [privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecAttrIsPermanent]; [privateKeyAttr setObject:privateTag forKey:(__bridge id)kSecAttrApplicationTag]; // See SecKey.h to set other flag values. // Set the public key dictionary. [publicKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecAttrIsPermanent]; [publicKeyAttr setObject:publicTag forKey:(__bridge id)kSecAttrApplicationTag]; // See SecKey.h to set other flag values. // Set attributes to top level dictionary. [keyPairAttr setObject:privateKeyAttr forKey:(__bridge id)kSecPrivateKeyAttrs]; [keyPairAttr setObject:publicKeyAttr forKey:(__bridge id)kSecPublicKeyAttrs]; // SecKeyGeneratePair returns the SecKeyRefs just for educational purposes. sanityCheck = SecKeyGeneratePair((__bridge CFDictionaryRef)keyPairAttr, &publicKey, &privateKey); // LOGGING_FACILITY( sanityCheck == noErr && publicKey != NULL && privateKey != NULL, @"Something really bad went wrong with generating the key pair." ); if(sanityCheck == noErr && publicKey != NULL && privateKey != NULL) { NSLog(@"Successful"); } // [privateKeyAttr release]; // [publicKeyAttr release]; // [keyPairAttr release]; } @end
这里是我最初张贴我的答案： Iphone – 如何encryption与公钥的NSData和用私钥解密？
让我知道如果你需要更多的帮助。
希望这可以帮助。
这很酷！ 但是我认为它不应该是一个UIViewController的子类，而是一个NSObject，我改变了，它适用于我，这里是：
注意：所有的工作都被感谢@Parth Bath
RSAManager.h
@interface RSAManager : NSObject { SecKeyRef publicKey; SecKeyRef privateKey; NSData *publicTag; NSData *privateTag; } - (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer; - (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer; - (SecKeyRef)getPublicKeyRef; - (SecKeyRef)getPrivateKeyRef; - (void)testAsymmetricEncryptionAndDecryption; - (void)generateKeyPair:(NSUInteger)keySize; @end
RSAManager.m
#import "RSAManager.h" const size_t BUFFER_SIZE = 64; const size_t CIPHER_BUFFER_SIZE = 1024; const uint32_t PADDING = kSecPaddingNone; static const UInt8 publicKeyIdentifier[] = "com.apple.sample.publickey"; static const UInt8 privateKeyIdentifier[] = "com.apple.sample.privatekey"; @implementation RSAManager - (id)init { self = [super init]; if(self) { privateTag = [[NSData alloc] initWithBytes:privateKeyIdentifier length:sizeof(privateKeyIdentifier)]; publicTag = [[NSData alloc] initWithBytes:publicKeyIdentifier length:sizeof(publicKeyIdentifier)]; [self testAsymmetricEncryptionAndDecryption]; } return self; } -(SecKeyRef)getPublicKeyRef { OSStatus sanityCheck = noErr; SecKeyRef publicKeyReference = NULL; if (publicKeyReference == NULL) { [self generateKeyPair:512]; NSMutableDictionary *queryPublicKey = [[NSMutableDictionary alloc] init]; // Set the public key query dictionary. [queryPublicKey setObject:(__bridge id)kSecClassKey forKey:(__bridge id)kSecClass]; [queryPublicKey setObject:publicTag forKey:(__bridge id)kSecAttrApplicationTag]; [queryPublicKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [queryPublicKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef]; // Get the key. sanityCheck = SecItemCopyMatching((__bridge CFDictionaryRef)queryPublicKey, (CFTypeRef *)&publicKeyReference); if (sanityCheck != noErr) { publicKeyReference = NULL; } // [queryPublicKey release]; } else { publicKeyReference = publicKey; } return publicKeyReference; } - (void)testAsymmetricEncryptionAndDecryption { uint8_t *plainBuffer; uint8_t *cipherBuffer; uint8_t *decryptedBuffer; const char inputString[] = "This is a test demo for RSA Implementation in Objective C"; int len = strlen(inputString); // TODO: this is a hack since i know inputString length will be less than BUFFER_SIZE if (len > BUFFER_SIZE) len = BUFFER_SIZE-1; plainBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); cipherBuffer = (uint8_t *)calloc(CIPHER_BUFFER_SIZE, sizeof(uint8_t)); decryptedBuffer = (uint8_t *)calloc(BUFFER_SIZE, sizeof(uint8_t)); strncpy( (char *)plainBuffer, inputString, len); NSLog(@"init() plainBuffer: %s", plainBuffer); //NSLog(@"init(): sizeof(plainBuffer): %d", sizeof(plainBuffer)); [self encryptWithPublicKey:(UInt8 *)plainBuffer cipherBuffer:cipherBuffer]; NSLog(@"encrypted data: %s", cipherBuffer); //NSLog(@"init(): sizeof(cipherBuffer): %d", sizeof(cipherBuffer)); [self decryptWithPrivateKey:cipherBuffer plainBuffer:decryptedBuffer]; NSLog(@"decrypted data: %s", decryptedBuffer); //NSLog(@"init(): sizeof(decryptedBuffer): %d", sizeof(decryptedBuffer)); NSLog(@"====== /second test ======================================="); free(plainBuffer); free(cipherBuffer); free(decryptedBuffer); } /* Borrowed from: * https://developer.apple.com/library/mac/#documentation/security/conceptual/CertKeyTrustProgGuide/iPhone_Tasks/iPhone_Tasks.html */ - (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer { NSLog(@"== encryptWithPublicKey()"); OSStatus status = noErr; NSLog(@"** original plain text 0: %s", plainBuffer); size_t plainBufferSize = strlen((char *)plainBuffer); size_t cipherBufferSize = CIPHER_BUFFER_SIZE; NSLog(@"SecKeyGetBlockSize() public = %lu", SecKeyGetBlockSize([self getPublicKeyRef])); // Error handling // Encrypt using the public. status = SecKeyEncrypt([self getPublicKeyRef], PADDING, plainBuffer, plainBufferSize, &cipherBuffer[0], &cipherBufferSize ); NSLog(@"encryption result code: %ld (size: %lu)", status, cipherBufferSize); NSLog(@"encrypted text: %s", cipherBuffer); } - (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer { OSStatus status = noErr; size_t cipherBufferSize = strlen((char *)cipherBuffer); NSLog(@"decryptWithPrivateKey: length of buffer: %lu", BUFFER_SIZE); NSLog(@"decryptWithPrivateKey: length of input: %lu", cipherBufferSize); // DECRYPTION size_t plainBufferSize = BUFFER_SIZE; // Error handling status = SecKeyDecrypt([self getPrivateKeyRef], PADDING, &cipherBuffer[0], cipherBufferSize, &plainBuffer[0], &plainBufferSize ); NSLog(@"decryption result code: %ld (size: %lu)", status, plainBufferSize); NSLog(@"FINAL decrypted text: %s", plainBuffer); } - (SecKeyRef)getPrivateKeyRef { OSStatus resultCode = noErr; SecKeyRef privateKeyReference = NULL; // NSData *privateTag = [NSData dataWithBytes:@"ABCD" length:strlen((const char *)@"ABCD")]; // if(privateKey == NULL) { [self generateKeyPair:512]; NSMutableDictionary * queryPrivateKey = [[NSMutableDictionary alloc] init]; // Set the private key query dictionary. [queryPrivateKey setObject:(__bridge id)kSecClassKey forKey:(__bridge id)kSecClass]; [queryPrivateKey setObject:privateTag forKey:(__bridge id)kSecAttrApplicationTag]; [queryPrivateKey setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [queryPrivateKey setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecReturnRef]; // Get the key. resultCode = SecItemCopyMatching((__bridge CFDictionaryRef)queryPrivateKey, (CFTypeRef *)&privateKeyReference); NSLog(@"getPrivateKey: result code: %ld", resultCode); if(resultCode != noErr) { privateKeyReference = NULL; } // [queryPrivateKey release]; // } else { // privateKeyReference = privateKey; // } return privateKeyReference; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } else { return YES; } } - (void)generateKeyPair:(NSUInteger)keySize { OSStatus sanityCheck = noErr; publicKey = NULL; privateKey = NULL; // LOGGING_FACILITY1( keySize == 512 || keySize == 1024 || keySize == 2048, @"%d is an invalid and unsupported key size.", keySize ); // First delete current keys. // [self deleteAsymmetricKeys]; // Container dictionaries. NSMutableDictionary * privateKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * publicKeyAttr = [[NSMutableDictionary alloc] init]; NSMutableDictionary * keyPairAttr = [[NSMutableDictionary alloc] init]; // Set top level dictionary for the keypair. [keyPairAttr setObject:(__bridge id)kSecAttrKeyTypeRSA forKey:(__bridge id)kSecAttrKeyType]; [keyPairAttr setObject:[NSNumber numberWithUnsignedInteger:keySize] forKey:(__bridge id)kSecAttrKeySizeInBits]; // Set the private key dictionary. [privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecAttrIsPermanent]; [privateKeyAttr setObject:privateTag forKey:(__bridge id)kSecAttrApplicationTag]; // See SecKey.h to set other flag values. // Set the public key dictionary. [publicKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(__bridge id)kSecAttrIsPermanent]; [publicKeyAttr setObject:publicTag forKey:(__bridge id)kSecAttrApplicationTag]; // See SecKey.h to set other flag values. // Set attributes to top level dictionary. [keyPairAttr setObject:privateKeyAttr forKey:(__bridge id)kSecPrivateKeyAttrs]; [keyPairAttr setObject:publicKeyAttr forKey:(__bridge id)kSecPublicKeyAttrs]; // SecKeyGeneratePair returns the SecKeyRefs just for educational purposes. sanityCheck = SecKeyGeneratePair((__bridge CFDictionaryRef)keyPairAttr, &publicKey, &privateKey); // LOGGING_FACILITY( sanityCheck == noErr && publicKey != NULL && privateKey != NULL, @"Something really bad went wrong with generating the key pair." ); if(sanityCheck == noErr && publicKey != NULL && privateKey != NULL) { NSLog(@"Successful"); } // [privateKeyAttr release]; // [publicKeyAttr release]; // [keyPairAttr release]; } @end
