58 lines
1.9 KiB
C#
58 lines
1.9 KiB
C#
namespace System.Security.Cryptography
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{
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/// <summary>
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/// HashMetadata represents the information stored in the encoded Argon2 format
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/// </summary>
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public class HashMetadata
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{
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/// <summary>
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/// The type of Argon2 hashing algorithm to use
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/// Argon2d - The memory access is dependent upon the hash value (vulnerable to side-channel attacks)
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/// Argon2i - The memory access is independent upon the hash value (safe from side-channel atacks)
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/// </summary>
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public Argon2Type ArgonType { get; set; }
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/// <summary>
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/// How much memory to use while hashing in kibibytes (KiB)
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/// </summary>
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public uint MemoryCost { get; set; }
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/// <summary>
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/// How many iterations of the Argon2 hash to perform
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/// </summary>
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public uint TimeCost { get; set; }
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/// <summary>
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/// How many threads to use while hashing
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/// </summary>
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public uint Parallelism { get; set; }
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/// <summary>
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/// The raw bytes of the salt
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/// </summary>
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public byte[] Salt { get; set; }
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/// <summary>
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/// The raw bytes of the hash
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/// </summary>
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public byte[] Hash { get; set; }
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/// <summary>
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/// A base-64 encoded string of the salt, minus the padding (=) characters
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/// </summary>
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public string GetBase64Salt() => Convert.ToBase64String(Salt).Replace("=", "");
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/// <summary>
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/// A base-64 encoded string of the hash, minus the padding (=) characters
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/// </summary>
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public string GetBase64Hash() => Convert.ToBase64String(Hash).Replace("=", "");
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/// <summary>
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/// Converts HashMetadata back into the original Argon2 formatted string.
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/// </summary>
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public override string ToString() =>
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$"$argon2{(ArgonType == Argon2Type.Argon2i ? "i" : "d")}$v=19$m={MemoryCost},t={TimeCost},p={Parallelism}${GetBase64Salt()}${GetBase64Hash()}";
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}
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}
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