62 lines
2.1 KiB
C#
62 lines
2.1 KiB
C#
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using System.Security.Cryptography;
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using System.Text;
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using Microsoft.AspNetCore.Cryptography.KeyDerivation;
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namespace BlueWest.Cryptography
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{
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/// <summary>
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/// SHA2_512 : BaseCryptoItem
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/// </summary>
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internal class SHA2_512 : BaseCryptoItem
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{
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/// <summary>
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/// Hash with the provided salt
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/// </summary>
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/// <param name="text"></param>
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/// <param name="salt"></param>
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/// <param name="storeSalt"></param>
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/// <returns></returns>
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public string Hash(string text, string salt, bool storeSalt)
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{
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var fullText = string.Concat(text, salt);
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var data = Encoding.UTF8.GetBytes(fullText);
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string hash;
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using SHA512 sha = SHA512.Create();
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var hashBytes = sha.ComputeHash(data);
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var asString = ByteArrayToString(hashBytes);
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if (storeSalt)
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{
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hash = $"{(int)HashAlgorithm.SHA3_512}{salt}{asString}";
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return hash;
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}
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hash = $"{(int)HashAlgorithm.SHA3_512}{asString}";
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return hash;
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}
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/// <summary>
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/// Hash_PBKDF2 algorithm.
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/// </summary>
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/// <param name="plainText"></param>
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/// <param name="salt"></param>
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/// <param name="saveSaltInResult"></param>
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/// <returns></returns>
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public string Hash_PBKDF2(string plainText, string salt, bool saveSaltInResult)
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{
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var saltAsBytes = Encoding.ASCII.GetBytes(salt);
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string hashed = ByteArrayToString(KeyDerivation.Pbkdf2(
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password: plainText,
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salt: saltAsBytes,
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prf: KeyDerivationPrf.HMACSHA512, //.NET 3.1 uses HMACSHA256 here
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iterationCount: 100000, //.NET 3.1 uses 10,000 iterations here
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numBytesRequested: 64)); //.NET 3.1 uses 32 bytes here
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if (saveSaltInResult)
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return string.Format("[{0}]{1}{2}", (int)HashAlgorithm.PBKDF2_SHA512, salt, hashed);
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else
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return string.Format("[{0}]{1}", (int)HashAlgorithm.PBKDF2_SHA512, hashed);
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}
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}
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}
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