###API
iOS加密工具类
#####Common:
+ (NSString *) b64Encode:(id)stringOrData;
+ (NSString *) b64Decode:(NSString *)b64String;
+ (NSData *) b64Decode4Data:(NSString *)b64String;
+ (NSString *) urlEncode:(NSString *)clearText;
+ (NSString *) urlDecode:(NSString *)urlString;
+ (NSString *) oneTimePassword:(NSString *)gen serverTime:(unsigned long long)serverTimeSecond;
#####MD5:
+ (NSString *) md5:(id)stringOrData;
+ (NSString *) md5File:(NSString *)filePath;
+ (NSString *) md5To16bit:(NSString *)md5_32bit;
#####SHA:
+ (NSString *) sha1:(id)stringOrData;
+ (NSString *) sha224:(id)stringOrData;
+ (NSString *) sha256:(id)stringOrData;
+ (NSString *) sha384:(id)stringOrData;
+ (NSString *) sha512:(id)stringOrData;
+ (NSString *) sha1File:(NSString *)filePath;
+ (NSString *) sha224File:(NSString *)filePath;
+ (NSString *) sha256File:(NSString *)filePath;
+ (NSString *) sha384File:(NSString *)filePath;
+ (NSString *) sha512File:(NSString *)filePath;
#####AES:
+ (NSData *) aes256Encrypt:(id)stringOrData key:(id)key;
+ (NSData *) aes256Decrypt:(id)stringOrData key:(id)key;
+ (BOOL) aes256EncryptFile:(NSString *)filePath
to:(NSString *)targetFilePath
key:(id)key;
+ (BOOL) aes256DecryptFile:(NSString *)filePath
to:(NSString *)targetFilePath
key:(id)key;
#####RSA:
+ (SecKeyRef) rsaPublicKeyRef:(NSString *)publicKeyPath;
+ (SecKeyRef) rsaPrivateKeyRef:(NSString *)privateKeyPath keyPassword:(NSString *)password;
+ (NSData *) rsaEncryptWithPublicKey:(NSData *)data publicKeyRef:(SecKeyRef)publicKeyRef;
+ (NSData *) rsaDecryptWithPrivateKey:(NSData *)data privateKeyRef:(SecKeyRef)privateKeyRef;
+ (NSData *) rsaSignWithPrivateKey:(NSData *)data privateKeyRef:(SecKeyRef)privateKeyRef;
+ (BOOL) rsaVerifyWithPublicKey:(NSData *)data signature:(NSData *)signature publicKeyRef:(SecKeyRef)publicKeyRef;