SHA1哈希值产生不同的结果，在Objective-C和C＃.NET [英] SHA1 hash producing different result in Objective-C and C#.NET
问题描述
基本上我想要写函数，计算SHA1哈希值。
Basically I want to write function that computes sha1 hash.
到目前为止，我已经试过如下：
So far I have tried is as follows.
C＃.NET
byte[] p2 = System.Text.Encoding.Unicode.GetBytes("password");
System.Security.Cryptography.SHA1 sha = new System.Security.Cryptography.SHA1CryptoServiceProvider();
byte[] result = sha.ComputeHash(p2);
string encodedPassword = Convert.ToBase64String(result);
输出：的6Pl / upEE0epQR5SObftn + s2fW3M =
Output : 6Pl/upEE0epQR5SObftn+s2fW3M=
的Objective-C
我添加类的Base64从 NSData_Base64类引用。
I have added classes for Base64 from NSData_Base64 Classes reference.
NSString *password = @"password";
NSData *data = [password dataUsingEncoding:NSUTF8StringEncoding];
NSString *unicodePassword = [[NSString alloc] initWithData:data encoding:NSUnicodeStringEncoding];
data = [unicodePassword dataUsingEncoding:NSUnicodeStringEncoding];
unsigned char hash[CC_SHA1_DIGEST_LENGTH];
CC_SHA1([data bytes], [data length], hash);
NSData *result = [NSData dataWithBytes:hash length:CC_SHA1_DIGEST_LENGTH];
NSLog(@"Result: %@",[result base64EncodedString]);
输出：的dYusXVhObIBzJMgg1E1FJ9cK1NY =
Output : dYusXVhObIBzJMgg1E1FJ9cK1NY=
任何人都可以请建议我究竟做错了什么？
Can anyone please suggest what am I doing wrong ?
为什么这两个值不同？
Why these two values differs ?
请纠正我的错误。
推荐答案
这行是错误的，因为你跨preT UTF8 EN codeD数据，就好像它是统一code连接codeD
This line is wrong, since you interpret UTF8 encoded data as if it was Unicode encoded:
的NSString * UNI codePassword = [[NSString的页头] initWithData：数据编码：NSUni codeStringEncoding]。
NSString *unicodePassword = [[NSString alloc] initWithData:data encoding:NSUnicodeStringEncoding];
Replce所述第二线路与：
的NSData *数据= [密码dataUsingEncoding：NSUni codeStringEncoding];
Replce the second line with:
NSData *data = [password dataUsingEncoding:NSUnicodeStringEncoding];
在数据的第2个字节是一个BOM（字节顺序标记）。
The 2 first bytes in data is a BOM (Byte order mark).
与删除这2个字节
数据= [NSData的dataWithBytes：[数据字节] + 2长度：[数据长度] - 2];
...然后散列数据的你将有相同的哈希在C＃。
...and then hash that data any you will have the same hash as in C#.
这篇关于SHA1哈希值产生不同的结果，在Objective-C和C＃.NET的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
