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TestDataGenerator.cs
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TestDataGenerator.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Runtime.CompilerServices;
namespace System.Security.Cryptography.X509Certificates.Tests
{
internal static class TestDataGenerator
{
internal static void MakeTestChain3(
out X509Certificate2 endEntityCert,
out X509Certificate2 intermediateCert,
out X509Certificate2 rootCert,
IEnumerable<X509Extension> endEntityExtensions = null,
IEnumerable<X509Extension> intermediateExtensions = null,
IEnumerable<X509Extension> rootExtensions = null,
[CallerMemberName] string testName = null)
{
using (RSA rootKey = RSA.Create())
using (RSA intermediateKey = RSA.Create())
using (RSA endEntityKey = RSA.Create())
{
ReadOnlySpan<RSA> keys = new[]
{
rootKey,
intermediateKey,
endEntityKey,
};
Span<X509Certificate2> certs = new X509Certificate2[keys.Length];
MakeTestChain(
keys,
certs,
endEntityExtensions,
intermediateExtensions,
rootExtensions,
testName);
endEntityCert = certs[0];
intermediateCert = certs[1];
rootCert = certs[2];
}
}
internal static void MakeTestChain4(
out X509Certificate2 endEntityCert,
out X509Certificate2 intermediateCert1,
out X509Certificate2 intermediateCert2,
out X509Certificate2 rootCert,
IEnumerable<X509Extension> endEntityExtensions = null,
IEnumerable<X509Extension> intermediateExtensions = null,
IEnumerable<X509Extension> rootExtensions = null,
[CallerMemberName] string testName = null)
{
using (RSA rootKey = RSA.Create())
using (RSA intermediateKey = RSA.Create())
using (RSA endEntityKey = RSA.Create())
{
ReadOnlySpan<RSA> keys = new[]
{
rootKey,
intermediateKey,
intermediateKey,
endEntityKey,
};
Span<X509Certificate2> certs = new X509Certificate2[keys.Length];
MakeTestChain(
keys,
certs,
endEntityExtensions,
intermediateExtensions,
rootExtensions,
testName);
endEntityCert = certs[0];
intermediateCert1 = certs[1];
intermediateCert2 = certs[2];
rootCert = certs[3];
}
}
internal static void MakeTestChain(
ReadOnlySpan<RSA> keys,
Span<X509Certificate2> certs,
IEnumerable<X509Extension> endEntityExtensions,
IEnumerable<X509Extension> intermediateExtensions,
IEnumerable<X509Extension> rootExtensions,
string testName)
{
if (keys.Length < 2)
throw new ArgumentException(nameof(keys));
if (keys.Length != certs.Length)
throw new ArgumentException(nameof(certs));
rootExtensions ??= new X509Extension[] {
new X509BasicConstraintsExtension(true, false, 0, true),
new X509KeyUsageExtension(
X509KeyUsageFlags.CrlSign |
X509KeyUsageFlags.KeyCertSign |
X509KeyUsageFlags.DigitalSignature,
false)
};
intermediateExtensions ??= new X509Extension[] {
new X509BasicConstraintsExtension(true, false, 0, true),
new X509KeyUsageExtension(
X509KeyUsageFlags.CrlSign |
X509KeyUsageFlags.KeyCertSign |
X509KeyUsageFlags.DigitalSignature,
false)
};
endEntityExtensions ??= new X509Extension[] {
new X509BasicConstraintsExtension(false, false, 0, true),
new X509KeyUsageExtension(
X509KeyUsageFlags.DigitalSignature |
X509KeyUsageFlags.NonRepudiation |
X509KeyUsageFlags.KeyEncipherment,
false)
};
TimeSpan notBeforeInterval = TimeSpan.FromDays(30);
TimeSpan notAfterInterval = TimeSpan.FromDays(90);
DateTimeOffset eeStart = DateTimeOffset.UtcNow.AddDays(-7);
DateTimeOffset eeEnd = eeStart.AddDays(45);
byte[] serialBuf = new byte[16];
int rootIndex = keys.Length - 1;
HashAlgorithmName hashAlgorithm = HashAlgorithmName.SHA256;
RSASignaturePadding signaturePadding = RSASignaturePadding.Pkcs1;
CertificateRequest rootReq = new CertificateRequest(
$"CN=Test Root, O=\"{testName}\"",
keys[rootIndex],
hashAlgorithm,
signaturePadding);
foreach (X509Extension extension in rootExtensions)
{
rootReq.CertificateExtensions.Add(extension);
}
X509SignatureGenerator lastGenerator = X509SignatureGenerator.CreateForRSA(keys[rootIndex], RSASignaturePadding.Pkcs1);
X500DistinguishedName lastSubject = rootReq.SubjectName;
certs[rootIndex] = rootReq.Create(
lastSubject,
lastGenerator,
eeStart - (notBeforeInterval * rootIndex),
eeEnd + (notAfterInterval * rootIndex),
CreateSerial());
int presentationNumber = 0;
for (int i = rootIndex - 1; i > 0; i--)
{
presentationNumber++;
CertificateRequest intermediateReq = new CertificateRequest(
$"CN=Intermediate Layer {presentationNumber}, O=\"{testName}\"",
keys[i],
hashAlgorithm,
signaturePadding);
foreach (X509Extension extension in intermediateExtensions)
{
intermediateReq.CertificateExtensions.Add(extension);
}
certs[i] = intermediateReq.Create(
lastSubject,
lastGenerator,
eeStart - (notBeforeInterval * i),
eeEnd + (notAfterInterval * i),
CreateSerial());
lastSubject = intermediateReq.SubjectName;
lastGenerator = X509SignatureGenerator.CreateForRSA(keys[i], RSASignaturePadding.Pkcs1);
}
CertificateRequest eeReq = new CertificateRequest(
$"CN=End-Entity, O=\"{testName}\"",
keys[0],
hashAlgorithm,
signaturePadding);
foreach (X509Extension extension in endEntityExtensions)
{
eeReq.CertificateExtensions.Add(extension);
}
certs[0] = eeReq.Create(lastSubject, lastGenerator, eeStart, eeEnd, CreateSerial());
}
private static byte[] CreateSerial()
{
byte[] bytes = new byte[8];
RandomNumberGenerator.Fill(bytes);
return bytes;
}
}
}