SHA1+Base64 & MD5:

#import "NSString+HmacSha1.h"#import 
    
     #import 
     
      @implementation NSString (HmacSha1)+ (NSString *)hmacSha1:(NSString *)key text:(NSString *)text{    const char *cKey  = [key cStringUsingEncoding:NSUTF8StringEncoding];    const char *cData = [text cStringUsingEncoding:NSUTF8StringEncoding];    uint8_t cHMAC[CC_SHA1_DIGEST_LENGTH];    CCHmac(kCCHmacAlgSHA1, cKey, strlen(cKey), cData, strlen(cData), cHMAC);    NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC length:CC_SHA1_DIGEST_LENGTH];    NSString *strHash = [HMAC base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];    return strHash;}+ (NSString *)hmacMd5:(NSData *)data{    unsigned char result[CC_MD5_DIGEST_LENGTH];    CC_MD5(data, (CC_LONG)data.length, result);    NSData *HMAC = [[NSData alloc] initWithBytes:result length:CC_MD5_DIGEST_LENGTH];    NSString *strMd5 = [HMAC base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];    return strMd5;}