我正在尝试编写用于从.net函数创建sha512字符串的函数
public static string GetSHA512(string strPlain) { UnicodeEncoding UE = new UnicodeEncoding(); byte[] HashValue = null; byte[] MessageBytes = UE.GetBytes(strPlain); System.Security.Cryptography.SHA512Managed SHhash = new System.Security.Cryptography.SHA512Managed(); string strHex = string.Empty; HashValue = SHhash.ComputeHash(MessageBytes); foreach (byte b in HashValue) { strHex += String.Format("{0:x2}",b); } return strHex; }
这给出了结果
input : pass123 output: 2a6353744cc2914c602265f50d2e413d0561368775756392517abb340ef75d52ee0c5d3623ddd1826fd768a13dca8961f5957c75df0d793b9d7537aabe050705
我试过的是如下
-(NSString *)createSHA512:(NSString *)string { const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding]; NSData *data = [NSData dataWithBytes:cstr length:string.length]; uint8_t digest[CC_SHA512_DIGEST_LENGTH]; CC_SHA512(data.bytes,data.length,digest); NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH]; for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++) [output appendFormat:@"%02x",digest[i]]; return output; }
给出结果如下
input : pass123 output: fd37ca5ca8763ae077a5e9740212319591603c42a08a60dcc91d12e7e457b024f6bdfdc10cdc1383e1602ff2092b4bc1bb8cac9306a9965eb352435f5dfe8bb0
任何人都可以建议我做错了什么?
为什么这两个值不同?
请纠正我的错误.
编辑
意思是虽然我尝试将编码改为NSUTF16StringEncoding和NSUnicodeStringEncoding,结果仍然不同,如下所示
input : pass123 output: 514331e3f7ca0a295539347ebccc4e4f095fe5f3c1df10d43b4d550144c7b30ba9507831893ea63ea22e62e993be529b0d14be7800a90aa0de199d6be62a5f1b
解决方法
在Objective C版本中,您使用UTF-8将文本转换为二进制文件.在.NET版本中,您使用的是UTF-16.这可能不是唯一的区别,但它肯定是一个相关的.
我将你的.NET方法重写为:
public static string GetSHA512(string text) { byte[] messageBytes = Encoding.UTF8.GetBytes(text); byte[] hash; using (SHA512 hashAlgorithm = SHA512.Create()) { hash = hashAlgorithm.ComputeHash(messageBytes); } StringBuilder builder = new StringBuilder(); foreach (byte b in hash) { builder.AppendFormat("{0:x2}",b); } return builder.ToString(); }