I have some string
and I want to hash it with the SHA-256 hash function using C#. I want something like this:
string hashString = sha256_hash("samplestring");
Is there something built into the framework to do this?
実装はそのようになる可能性があります
public static String sha256_hash(String value) {
StringBuilder Sb = new StringBuilder();
using (SHA256 hash = SHA256Managed.Create()) {
Encoding enc = Encoding.UTF8;
Byte[] result = hash.ComputeHash(enc.GetBytes(value));
foreach (Byte b in result)
Sb.Append(b.ToString("x2"));
}
return Sb.ToString();
}
編集: Linqの実装はより簡潔ですが、おそらく読みにくいです:
public static String sha256_hash(String value) {
using (SHA256 hash = SHA256Managed.Create()) {
return String.Concat(hash
.ComputeHash(Encoding.UTF8.GetBytes(value))
.Select(item => item.ToString("x2")));
}
}
編集 2: .NET Core 、.NET5、.NET6 ...
public static String sha256_hash(string value)
{
StringBuilder Sb = new StringBuilder();
using (var hash = SHA256.Create())
{
Encoding enc = Encoding.UTF8;
byte[] result = hash.ComputeHash(enc.GetBytes(value));
foreach (byte b in result)
Sb.Append(b.ToString("x2"));
}
return Sb.ToString();
}