iOS之SHA1算法

参考：http://www.jianshu.com/p/8bc791ec42b6

http://www.cnblogs.com/scu-cjx/p/6878853.html

#import <CommonCrypto/CommonDigest.h>

//SHA1加密方式

+(NSString*)sha1WithStr:(NSString *)str

{

    constchar *cstr = [strcStringUsingEncoding:NSUTF8StringEncoding];

    NSData *data = [NSDatadataWithBytes:cstr length: strlen(cstr)];

    

    uint8_t digest[CC_SHA1_DIGEST_LENGTH];

    

    CC_SHA1(data.bytes, data.length, digest);

    

    NSMutableString* output = [NSMutableStringstringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];

    

    for(int i = 0; i <CC_SHA1_DIGEST_LENGTH; i++)

        [output appendFormat:@"%02x", digest[i]];

    

    return output;

}