签名算法要求:
请求参数增加、signStr,其中signTime为当前时间戳、signStr为16位随机字符串。
第一步,将所有请求参数按照参数名ASCII码从小到大排序(字典序),再使用URL键值对的格式(即key1=value1&key2=value2…)拼接成字符串stringA。
第二步,在stringA最后拼接上key得到stringSignTemp字符串,并对stringSignTemp进行MD5运算,再将得到的字符串所有字符转换为大写,得到sign值signValue。
注意: 签名算法进行签名后作为发送请求时的一个参数,
比如:发送请求时参数为NSDictionary*dict = @{ @"id" :@"10",
@"page":@"1",
@"signTime":@"1464147000",
@"signStr":@"c1bhbqiolpn6xs31"};
对参数进行签名
NSString *signStr = [xx encoingWithDic:dict Withcharacter:@"c1bhbqiolpn6xs31"];
把返回的签名作为其中一个参数
[dict setObject:signStr forKey:@"sign"]
接下来就是用这个合成的字典进行请求数据啦!
/** * 加密url
dataDic 要进行签名的字典
character 随机16位数
*/
+(NSString*)encoingWithDic:(NSMutableDictionary*)dataDic Withcharacter:(NSString*)character
{
//当前时间戳
NSDate *datenow = [NSDate date];
NSString *timeSp = [NSString stringWithFormat:@"%ld", (long)[datenow timeIntervalSince1970]];
[dataDic setObject:timeSp forKey:@"signTime"];
//随机16位数
//NSString *randomStr = [NSString generateFradomCharacter];
[dataDic setObject:character forKey:@"signStr"];
/*请求参数按照参数名ASCII码从小到大排序*/
NSArray *keys = [dataDic allKeys];
//按字母顺序排序
NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2)
{ return [obj1 compare:obj2 options:NSNumericSearch];
}];
NSString *returnStr = @"";
//拼接字符串
for (int i=0;i<sortedArray.count;i++){
NSString *category = sortedArray[i];
if (i==0) {
returnStr =[NSString stringWithFormat:@"%@=%@",category,dataDic[category]];}else{
returnStr = [NSString stringWithFormat:@"%@&%@=%@",returnStr,category,dataDic[category]];}
}
/*拼接上key得到stringSignTemp*/
returnStr = [NSString stringWithFormat:@"%@&key=%@",returnStr,urlKey];
/*md5加密*/
returnStr = [self bigmd5:returnStr];
}
//md5 32位加密 (大写)
+(NSString *)bigmd5:(NSString *)str {
const char *cStr = [str UTF8String];
unsigned char result[16];
CC_MD5( cStr, 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]
];
}
//md5 32位 加密 (小写)
+ (NSString *)md5:(NSString *)str {
const char *cStr = [str UTF8String];
unsigned char result[32];
CC_MD5( cStr, strlen(cStr), result );
return [NSString stringWithFormat:
@"xxxxxxxxxxxxxxxx",
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],
result[16], result[17],result[18], result[19],
result[20], result[21],result[22], result[23],
result[24], result[25],result[26], result[27],
result[28], result[29],result[30], result[31]];
}
//产生16位随机数
+ (NSString *)generateFradomCharacter
{
static int kNumber = 16;
NSString *sourceStr = @"abcdefghijklmnopqrstuvwxyz0123456789";
NSMutableString *resultStr = [[NSMutableString alloc] init];
for (int i = 0; i < kNumber; i++)
{
unsigned index = arc4random() % [sourceStr length];
NSString *oneStr = [sourceStr substringWithRange:NSMakeRange(index, 1)];
[resultStr appendString:oneStr];
}
return resultStr;
}
希望对大家有用!