IOS 自写HTTP，degest认证客户端

仅供自己参考，留个印象

首先是自己的MD5

-(NSString *) MD5: (NSString *)string

{

    unsignedchar digest[CC_MD5_DIGEST_LENGTH];

    

CC_MD5_CTX md5;

CC_MD5_Init(&md5);

CC_MD5_Update(&md5, [string UTF8String], [string length]);

CC_MD5_Final(digest, &md5);

NSString* s = [NSStringstringWithFormat: @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",

  digest[0], digest[1], 

  digest[2], digest[3],

  digest[4], digest[5],

  digest[6], digest[7],

  digest[8], digest[9],

  digest[10], digest[11],

  digest[12], digest[13],

  digest[14], digest[15]];

return s;

}

然后是根据Digest算法组拼response

-(void)verifyContact:(NSHTTPURLResponse *)res

{

    NSString * Authenticate=[[res allHeaderFields] objectForKey:@"Www-Authenticate"];

    

    NSMutableArray *array=[NSMutableArray arrayWithArray:[Authenticate componentsSeparatedByString:@","]];

    NSString *nonce;

    NSString *opaque;

    NSString *qop;

    NSString *realm;

    for (NSString *string in array) {

        

        NSRange range1=[string rangeOfString:@"="];

        NSRange range2=[string rangeOfString:@"realm"];

        NSRange range3=[string rangeOfString:@"nonce"];

        NSRange range4=[string rangeOfString:@"opaque"];

        NSRange range5=[string rangeOfString:@"qop"];

        

        

        

        string =[string substringFromIndex:range1.location+2];

        int length=[string length];

        string=[string substringToIndex:length-1];

        

        if(range2.location!=NSNotFound)

        {

            realm=string;

        }

        else if(range3.location!=NSNotFound){

            nonce=string;

        }

        else if (range4.location!=NSNotFound) {

            opaque=string;

        }

        else if (range5.location!=NSNotFound) {

            qop=string;

        }

        

        

        

    }

/*

     Accept:text/html,application/xhtml+xml,application/xml;q=0.9;q=0.8

     Accept-Charset:GBK,utf-8;q=0.7,*;q=0.3

     Accept-Encoding:gzip,deflate,sdch

     Accept-Language:zh-CN,zh;q=0.8

     Authorization:Digest username="xxx", realm="Active Phone Book", nonce="1339576936611:9c638a3ecb91b0c70d14afaa1419a555", uri="/Contacts", response="0d4fab572c5f25fb7edb20101250175f", opaque="2378F7FC02D9DB685F0B1257C542CE75", qop=auth, nc=00000001, cnonce="8cf4b89abdc36228"

     Connection:keep-alive

     Cookie:JSESSIONID=29F20F29603A285EF668A762012B2FDE

     Host:xxxxx

     User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.46 Safari/536.5

     */

    NSString *username = [app.passwordItem objectForKey:kSecAttrDescription];

    NSString *password = [app.passwordItem objectForKey:kSecAttrComment];

    NSString *A1=[NSString stringWithFormat:@"%@:%@:%@",username,realm,password];

    NSString *HA1=[self MD5:A1];

    NSString *A2=@"POST:/Contacts";

    NSString *HA2=[self MD5:A2];

    NSString *nc=@"00000001";

    NSString *cnonce=[self MD5:[NSString stringWithFormat:@"%ld",random()]];

    NSString *responseToMD5=[NSString stringWithFormat:@"%@:%@:%@:%@:%@:%@",HA1,nonce,nc,cnonce,qop,HA2];

    NSString *response_Digest=[self MD5:responseToMD5];

    

    NSString *Authorization =[NSString stringWithFormat:@" Digest username=\"%@\", realm=\"%@\", nonce=\"%@\", uri=\"%@\", response=\"%@\", opaque=\"%@\", qop=auth, nc=%@, cnonce=\"%@\"",username,realm,nonce,@"/Contacts",response_Digest,opaque,nc,cnonce];

    NSLog(@"what is my Authorization:%@",Authorization);

}