iOS开发加密

1、Md5分16进制和32进制

#import <Foundation/Foundation.h>

@interface MD5Encryption : NSObject
+ (NSString *)md5by32:(NSString*)input;
+ (NSString *)md5:(NSString *)str;
@end

#import "MD5Encryption.h"
#import <CommonCrypto/CommonDigest.h>

@implementation MD5Encryption

//md5加密-32位 (小写)
+ (NSString *)md5by32:(NSString*)input
{
    const char* str = [input UTF8String];
    unsigned char result[CC_MD5_DIGEST_LENGTH];
    CC_MD5(str, (unsigned int)strlen(str), result);
    NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2];
    for(int i = 0; i<CC_MD5_DIGEST_LENGTH; i++) {
        [ret appendFormat:@"%02x",result[i]];
    }
    return ret;
}

//md5 16位加密 （大写）
+ (NSString *)md5:(NSString *)str {
    const char *cStr = [str UTF8String];
    unsigned char result[16];
    CC_MD5( cStr, (unsigned int)strlen(cStr), result );
    return [NSString stringWithFormat:@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
            result[0], result[1], result[2], result[3],
            result[4], result[5], result[6], result[7],
            result[8], result[9], result[10], result[11],
            result[12], result[13], result[14], result[15]
            ];
}

@end

 2、Base64

链接: http://pan.baidu.com/s/1gfAZhPx 密码: 1kw4