# < Summary

Information

Class: | Renci.SshNet.Security.Key
Assembly: | Renci.SshNet
File(s): | \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\Cryptography\Key.cs

Line coverage
79%

Covered lines: | 19
Uncovered lines: | 5
Coverable lines: | 24
Total lines: | 100
Line coverage: | 79.1%

Branch coverage
75%

Covered branches: | 3
Total branches: | 4
Branch coverage: | 75%

Method coverage

Feature is only available for sponsors

Upgrade to PRO version

# Metrics

Method | Branch coverage | Cyclomatic complexity | Line coverage
--- | --- | --- | ---
get_Comment() | 100% | 1 | 100%
.ctor(...) | 75% | 4 | 85.71%
.ctor() | 100% | 1 | 100%
Sign(...) | 100% | 1 | 100%
VerifySignature(...) | 100% | 1 | 0%

# File(s)

## \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\Cryptography\Key.cs

| # | Line |  | Line coverage
--- | --- | --- | --- | ---
|  | `1` |  | `using System;`
|  | `2` |  | `using System.Collections.Generic;`
|  | `3` |  | ``
|  | `4` |  | `using Renci.SshNet.Common;`
|  | `5` |  | `using Renci.SshNet.Security.Cryptography;`
|  | `6` |  | ``
|  | `7` |  | `namespace Renci.SshNet.Security`
|  | `8` |  | `{`
|  | `9` |  | `/// <summary>`
|  | `10` |  | `/// Base class for asymmetric cipher algorithms.`
|  | `11` |  | `/// </summary>`
|  | `12` |  | `public abstract class Key`
|  | `13` |  | `{`
|  | `14` |  | `/// <summary>`
|  | `15` |  | `/// Specifies array of big integers that represent private key.`
|  | `16` |  | `/// </summary>`
|  | `17` |  | `#pragma warning disable SA1401 // Fields should be private`
|  | `18` |  | `protected BigInteger[] _privateKey;`
|  | `19` |  | `#pragma warning restore SA1401 // Fields should be private`
|  | `20` |  | ``
|  | `21` |  | `/// <summary>`
|  | `22` |  | `/// Gets the default digital signature implementation for this key.`
|  | `23` |  | `/// </summary>`
|  | `24` |  | `protected internal abstract DigitalSignature DigitalSignature { get; }`
|  | `25` |  | ``
|  | `26` |  | `/// <summary>`
|  | `27` |  | `/// Gets or sets the public key.`
|  | `28` |  | `/// </summary>`
|  | `29` |  | `/// <value>`
|  | `30` |  | `/// The public.`
|  | `31` |  | `/// </value>`
|  | `32` |  | `public abstract BigInteger[] Public { get; set; }`
|  | `33` |  | ``
|  | `34` |  | `/// <summary>`
|  | `35` |  | `/// Gets the length of the key.`
|  | `36` |  | `/// </summary>`
|  | `37` |  | `/// <value>`
|  | `38` |  | `/// The length of the key.`
|  | `39` |  | `/// </value>`
|  | `40` |  | `public abstract int KeyLength { get; }`
|  | `41` |  | ``
|  | `42` |  | `/// <summary>`
|  | `43` |  | `/// Gets or sets the key comment.`
|  | `44` |  | `/// </summary>`
| 33 | `45` |  | `public string Comment { get; set; }`
|  | `46` |  | ``
|  | `47` |  | `/// <summary>`
|  | `48` |  | `/// Initializes a new instance of the <see cref="Key"/> class.`
|  | `49` |  | `/// </summary>`
|  | `50` |  | `/// <param name="data">DER encoded private key data.</param>`
| 499 | `51` |  | `protected Key(byte[] data)`
| 499 | `52` |  | `{`
| 499 | `53` |  | `if (data is null)`
| 0 | `54` |  | `{`
| 0 | `55` |  | `throw new ArgumentNullException(nameof(data));`
|  | `56` |  | `}`
|  | `57` |  | ``
| 499 | `58` |  | `var der = new DerData(data);`
| 499 | `59` |  | `_ = der.ReadBigInteger(); // skip version`
|  | `60` |  | ``
| 499 | `61` |  | `var keys = new List<BigInteger>();`
| 4491 | `62` |  | `while (!der.IsEndOfData)`
| 3992 | `63` |  | `{`
| 3992 | `64` |  | `keys.Add(der.ReadBigInteger());`
| 3992 | `65` |  | `}`
|  | `66` |  | ``
| 499 | `67` |  | `_privateKey = keys.ToArray();`
| 499 | `68` |  | `}`
|  | `69` |  | ``
|  | `70` |  | `/// <summary>`
|  | `71` |  | `/// Initializes a new instance of the <see cref="Key"/> class.`
|  | `72` |  | `/// </summary>`
| 1291 | `73` |  | `protected Key()`
| 1291 | `74` |  | `{`
| 1291 | `75` |  | `}`
|  | `76` |  | ``
|  | `77` |  | `/// <summary>`
|  | `78` |  | `/// Signs the specified data with the key.`
|  | `79` |  | `/// </summary>`
|  | `80` |  | `/// <param name="data">The data to sign.</param>`
|  | `81` |  | `/// <returns>`
|  | `82` |  | `/// Signed data.`
|  | `83` |  | `/// </returns>`
|  | `84` |  | `public byte[] Sign(byte[] data)`
| 3 | `85` |  | `{`
| 3 | `86` |  | `return DigitalSignature.Sign(data);`
| 3 | `87` |  | `}`
|  | `88` |  | ``
|  | `89` |  | `/// <summary>`
|  | `90` |  | `/// Verifies the signature.`
|  | `91` |  | `/// </summary>`
|  | `92` |  | `/// <param name="data">The data to verify.</param>`
|  | `93` |  | `/// <param name="signature">The signature to verify against.</param>`
|  | `94` |  | `/// <returns><see langword="true"/> is signature was successfully verifies; otherwise <see langword="false"/>.</`
|  | `95` |  | `public bool VerifySignature(byte[] data, byte[] signature)`
| 0 | `96` |  | `{`
| 0 | `97` |  | `return DigitalSignature.Verify(data, signature);`
| 0 | `98` |  | `}`
|  | `99` |  | `}`
|  | `100` |  | `}`

# Methods/Properties

get_Comment()
.ctor(System.Byte[])
.ctor()
Sign(System.Byte[])
VerifySignature(System.Byte[],System.Byte[])