92 lines
2.8 KiB
C#
92 lines
2.8 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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namespace ServiceShared.Crypto
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{
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public static class SHA512
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{
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/// <summary>
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/// Encrypts a string value in SHA512 hash
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/// </summary>
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/// <param name="value">string value that should be encrypted in SHA512 hash</param>
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/// <returns>Returns SHA512 hash</returns>
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public static string Encrypt(string value)
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{
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string result = null;
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try
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{
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byte[] bytes = Encoding.UTF8.GetBytes(value);
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using (System.Security.Cryptography.SHA512 hash = System.Security.Cryptography.SHA512.Create())
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{
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byte[] hashedInputBytes = hash.ComputeHash(bytes);
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StringBuilder hashedInputStringBuilder = new StringBuilder(128);
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foreach (var b in hashedInputBytes)
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{
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hashedInputStringBuilder.Append(b.ToString("X2"));
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}
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result = hashedInputStringBuilder.ToString().ToLower();
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}
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}
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catch
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{
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result = null;
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}
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return result;
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}
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/// <summary>
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/// Generates SHA512 HMAC Hash with key
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/// </summary>
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/// <param name="message">message that should be signed by sha512 hmac</param>
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/// <param name="key">key that should be used for signing</param>
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/// <returns>SHA512 HMAC</returns>
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public static string HMAC(string message, byte[] key)
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{
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string result = null;
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try
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{
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StringBuilder hash = new StringBuilder();
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byte[] messageBytes = Encoding.UTF8.GetBytes(message);
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using (HMACSHA512 hmac = new HMACSHA512(key))
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{
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byte[] hashValue = hmac.ComputeHash(messageBytes);
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foreach (var theByte in hashValue)
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{
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hash.Append(theByte.ToString("x2"));
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}
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}
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return hash.ToString();
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}
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catch
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{
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result = null;
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}
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return result;
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}
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/// <summary>
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/// Validates HMAC with message and key
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/// </summary>
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/// <param name="hmac">HMAC from the partner</param>
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/// <param name="message">message that should be signed by sha512 hmac</param>
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/// <param name="key">key that should be used for signing</param>
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/// <returns>returns true if success</returns>
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public static bool isValidAuthenticationCode(string hmac, string message, byte[] key)
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{
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return (hmac != null && HMAC(message, key) == hmac);
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}
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}
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}
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