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| // | ||
| // RNCryptManager.h | ||
| // | ||
| // Copyright (c) 2012 Rob Napier | ||
| // | ||
| // This code is licensed under the MIT License: | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a | ||
| // copy of this software and associated documentation files (the "Software"), | ||
| // to deal in the Software without restriction, including without limitation | ||
| // the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| // and/or sell copies of the Software, and to permit persons to whom the | ||
| // Software is furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| // DEALINGS IN THE SOFTWARE. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| #import <CommonCrypto/CommonCryptor.h> | ||
| #import <CommonCrypto/CommonKeyDerivation.h> | ||
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| extern NSString * const kRNCryptManagerErrorDomain; | ||
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| /** AES Encrypter/Decrypter for Mac and iOS. | ||
| Provides an easy-to-use, Objective-C interface to the AES functionality of | ||
| CommonCrypto. Simplifies correct handling of password stretching (PBKDF2), | ||
| salting, and IV. For more information on these terms, see "Properly encrypting | ||
| with AES with CommonCrypto" http://robnapier.net/blog/aes-commoncrypto-564 | ||
| Requires Security.framework. | ||
| */ | ||
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| @interface RNCryptManager : NSObject | ||
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| ///--------------------------------------------------------------------------------------- | ||
| /// @name Encrypt/Decrypt In Memory | ||
| ///--------------------------------------------------------------------------------------- | ||
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| /** Encrypts data against a password, with a randomly generated IV and salt | ||
| @param data The data to encrypt | ||
| @param password A password. Generally this is human-provided. An AES key will be generated from this. | ||
| @param iv Out parameter set to the randomly generated IV. This may not be `NULL`. | ||
| @param salt Out parameter set to the randomly generated salt. This may not be `NULL`. | ||
| @param error Out parameter used if an error occurs. May be `NULL` if no error is required. | ||
| @return Returns the encrypted data, or `nil` if there is an error. | ||
| */ | ||
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| + (NSData *)encryptedDataForData:(NSData *)data | ||
| password:(NSString *)password | ||
| iv:(NSData **)iv | ||
| salt:(NSData **)salt | ||
| error:(NSError **)error; | ||
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| /** Decrypts data using a password, IV and salt | ||
| @param data The data to decrypt | ||
| @param password A password. Generally this is human-provided. An AES key will be generated from this using the same algorithm as in the encrypt methods. | ||
| @param iv The IV (generally provided by encrypt methods) | ||
| @param salt The salt (generally provided by encrypt methods) | ||
| @param error Out parameter used if an error occurs. May be `NULL` if no error is required. | ||
| @return Returns the decrypted data, or `nil` if there is an error. | ||
| */ | ||
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| + (NSData *)decryptedDataForData:(NSData *)data | ||
| password:(NSString *)password | ||
| iv:(NSData *)iv | ||
| salt:(NSData *)salt | ||
| error:(NSError **)error; | ||
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| ///--------------------------------------------------------------------------------------- | ||
| /// @name Encrypt/Decrypt with NSStream | ||
| ///--------------------------------------------------------------------------------------- | ||
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| /** Encrypts stream against a password, with a randomly generated IV and salt. IV and salt will be prepended to resulting stream. | ||
| @param fromStream The stream to encrypt | ||
| @param toStream The stream to write encrypted data to | ||
| @param password A password. Generally this is human-provided. An AES key will be generated from this. | ||
| @param error Out parameter used if an error occurs. May be `NULL` if no error is required. | ||
| @return Returns `YES` if successful. Return `NO` and sets `error` if there is an error. | ||
| */ | ||
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| + (BOOL)encryptFromStream:(NSInputStream *)fromStream | ||
| toStream:(NSOutputStream *)toStream | ||
| password:(NSString *)password | ||
| error:(NSError **)error; | ||
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| /** Decrypts data using a password. IV and salt must be at the beginning of the stream, as provided by encryptFromStream:toStream:password:error:. | ||
| @param fromStream The stream to decrypt | ||
| @param toStream The stream to write decrypted data to | ||
| @param password A password. Generally this is human-provided. An AES key will be generated from this using the same algorithm as in the encrypt methods. | ||
| @param error Out parameter used if an error occurs. May be `NULL` if no error is required. | ||
| @return Returns `YES` if successful. Return `NO` and sets `error` if there is an error. | ||
| */ | ||
| + (BOOL)decryptFromStream:(NSInputStream *)fromStream | ||
| toStream:(NSOutputStream *)toStream | ||
| password:(NSString *)password | ||
| error:(NSError **)error; | ||
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| @end |
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