# < Summary

Information

Class: | Renci.SshNet.Security.Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator
Assembly: | Renci.SshNet
File(s): | \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\BouncyCastle\crypto\generators\ECKeyPairGenerator.cs

Line coverage
75%

Covered lines: | 34
Uncovered lines: | 11
Coverable lines: | 45
Total lines: | 91
Line coverage: | 75.5%

Branch coverage
75%

Covered branches: | 9
Total branches: | 12
Branch coverage: | 75%

Method coverage

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# Metrics

Method | Branch coverage | Cyclomatic complexity | Line coverage
--- | --- | --- | ---
.ctor() | 100% | 1 | 100%
.ctor(...) | 50% | 2 | 85.71%
Init(...) | 75% | 4 | 75%
GenerateKeyPair() | 83.33% | 6 | 86.66%
CreateBasePointMultiplier() | 100% | 1 | 100%
GetCorrespondingPublicKey(...) | 100% | 1 | 0%

# File(s)

## \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\BouncyCastle\crypto\generators\ECKeyPairGenerator.cs

| # | Line |  | Line coverage
--- | --- | --- | --- | ---
|  | `1` |  | `using System;`
|  | `2` |  | ``
|  | `3` |  | `using Renci.SshNet.Security.Org.BouncyCastle.Crypto.Parameters;`
|  | `4` |  | `using Renci.SshNet.Security.Org.BouncyCastle.Math;`
|  | `5` |  | `using Renci.SshNet.Security.Org.BouncyCastle.Math.EC;`
|  | `6` |  | `using Renci.SshNet.Security.Org.BouncyCastle.Math.EC.Multiplier;`
|  | `7` |  | `using Renci.SshNet.Security.Org.BouncyCastle.Security;`
|  | `8` |  | ``
|  | `9` |  | `namespace Renci.SshNet.Security.Org.BouncyCastle.Crypto.Generators`
|  | `10` |  | `{`
|  | `11` |  | `internal class ECKeyPairGenerator`
|  | `12` |  | `: IAsymmetricCipherKeyPairGenerator`
|  | `13` |  | `{`
|  | `14` |  | `private readonly string algorithm;`
|  | `15` |  | ``
|  | `16` |  | `private ECDomainParameters parameters;`
|  | `17` |  | `private SecureRandom random;`
|  | `18` |  | ``
|  | `19` |  | `public ECKeyPairGenerator()`
| 9 | `20` |  | `: this("EC")`
| 9 | `21` |  | `{`
| 9 | `22` |  | `}`
|  | `23` |  | ``
| 9 | `24` |  | `public ECKeyPairGenerator(`
| 9 | `25` |  | `string algorithm)`
| 9 | `26` |  | `{`
| 9 | `27` |  | `if (algorithm == null)`
| 0 | `28` |  | `throw new ArgumentNullException("algorithm");`
|  | `29` |  | ``
| 9 | `30` |  | `this.algorithm = ECKeyParameters.VerifyAlgorithmName(algorithm);`
| 9 | `31` |  | `}`
|  | `32` |  | ``
|  | `33` |  | `public void Init(`
|  | `34` |  | `KeyGenerationParameters parameters)`
| 9 | `35` |  | `{`
| 9 | `36` |  | `if (parameters is ECKeyGenerationParameters)`
| 9 | `37` |  | `{`
| 9 | `38` |  | `ECKeyGenerationParameters ecP = (ECKeyGenerationParameters) parameters;`
|  | `39` |  | ``
| 9 | `40` |  | `this.parameters = ecP.DomainParameters;`
| 9 | `41` |  | `}`
|  | `42` |  | ``
| 9 | `43` |  | `this.random = parameters.Random;`
|  | `44` |  | ``
| 9 | `45` |  | `if (this.random == null)`
| 0 | `46` |  | `{`
| 0 | `47` |  | `this.random = new SecureRandom();`
| 0 | `48` |  | `}`
| 9 | `49` |  | `}`
|  | `50` |  | ``
|  | `51` |  | `public AsymmetricCipherKeyPair GenerateKeyPair()`
| 9 | `52` |  | `{`
| 9 | `53` |  | `BigInteger n = parameters.N;`
|  | `54` |  | `BigInteger d;`
| 9 | `55` |  | `int minWeight = n.BitLength >> 2;`
|  | `56` |  | ``
|  | `57` |  | `for (;;)`
| 9 | `58` |  | `{`
| 9 | `59` |  | `d = new BigInteger(n.BitLength, random);`
|  | `60` |  | ``
| 9 | `61` |  | `if (d.CompareTo(BigInteger.Two) < 0 || d.CompareTo(n) >= 0)`
| 0 | `62` |  | `continue;`
|  | `63` |  | ``
| 9 | `64` |  | `if (WNafUtilities.GetNafWeight(d) < minWeight)`
| 0 | `65` |  | `continue;`
|  | `66` |  | ``
| 9 | `67` |  | `break;`
|  | `68` |  | `}`
|  | `69` |  | ``
| 9 | `70` |  | `ECPoint q = CreateBasePointMultiplier().Multiply(parameters.G, d);`
|  | `71` |  | ``
| 9 | `72` |  | `return new AsymmetricCipherKeyPair(`
| 9 | `73` |  | `new ECPublicKeyParameters(algorithm, q, parameters),`
| 9 | `74` |  | `new ECPrivateKeyParameters(algorithm, d, parameters));`
| 9 | `75` |  | `}`
|  | `76` |  | ``
|  | `77` |  | `protected virtual ECMultiplier CreateBasePointMultiplier()`
| 9 | `78` |  | `{`
| 9 | `79` |  | `return new FixedPointCombMultiplier();`
| 9 | `80` |  | `}`
|  | `81` |  | ``
|  | `82` |  | `internal static ECPublicKeyParameters GetCorrespondingPublicKey(`
|  | `83` |  | `ECPrivateKeyParameters privKey)`
| 0 | `84` |  | `{`
| 0 | `85` |  | `ECDomainParameters ec = privKey.Parameters;`
| 0 | `86` |  | `ECPoint q = new FixedPointCombMultiplier().Multiply(ec.G, privKey.D);`
|  | `87` |  | ``
| 0 | `88` |  | `return new ECPublicKeyParameters(privKey.AlgorithmName, q, ec);`
| 0 | `89` |  | `}`
|  | `90` |  | `}`
|  | `91` |  | `}`

# Methods/Properties

.ctor()
.ctor(System.String)
Init(Renci.SshNet.Security.Org.BouncyCastle.Crypto.KeyGenerationParameters)
GenerateKeyPair()
CreateBasePointMultiplier()
GetCorrespondingPublicKey(Renci.SshNet.Security.Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters)