public static void LoadBigExponentRequest_PemString(CertificateRequestLoadOptions options, bool multiPem)
{
string pem = TestData.BigExponentPkcs10Pem;
if (multiPem)
{
pem = $@"
-----BEGIN UNRELATED-----
abcd
-----END UNRELATED-----
-----BEGIN CERTIFICATE REQUEST-----
!!!!!INVALID!!!!!
-----END CERTIFICATE REQUEST-----
-----BEGIN MORE UNRELATED-----
efgh
-----END MORE UNRELATED-----
{pem}
-----BEGIN CERTIFICATE REQUEST-----
!!!!!INVALID!!!!!
-----END CERTIFICATE REQUEST-----";
}
CertificateRequest req = CertificateRequest.LoadSigningRequestPem(
pem,
HashAlgorithmName.SHA512,
options);
Assert.Equal(HashAlgorithmName.SHA512, req.HashAlgorithm);
VerifyBigExponentRequest(req, options);
}
public static void LoadBigExponentRequest_Bytes(CertificateRequestLoadOptions options)
{
CertificateRequest req = CertificateRequest.LoadSigningRequest(
TestData.BigExponentPkcs10Bytes,
HashAlgorithmName.SHA384,
options);
Assert.Equal(HashAlgorithmName.SHA384, req.HashAlgorithm);
VerifyBigExponentRequest(req, options);
}
public static void LoadBigExponentRequest_Bytes_Oversized(CertificateRequestLoadOptions options)
{
byte[] pkcs10 = TestData.BigExponentPkcs10Bytes;
Array.Resize(ref pkcs10, pkcs10.Length + 1);
Assert.Throws <CryptographicException>(
() => CertificateRequest.LoadSigningRequest(
pkcs10,
HashAlgorithmName.SHA384,
options));
}
public static CertificateRequest LoadSigningRequestPem(
string pkcs10Pem,
HashAlgorithmName signerHashAlgorithm,
CertificateRequestLoadOptions options = CertificateRequestLoadOptions.Default,
RSASignaturePadding?signerSignaturePadding = null)
{
ArgumentNullException.ThrowIfNull(pkcs10Pem);
return(LoadSigningRequestPem(
pkcs10Pem.AsSpan(),
signerHashAlgorithm,
options,
signerSignaturePadding));
}
public static CertificateRequest LoadSigningRequest(
ReadOnlySpan <byte> pkcs10,
HashAlgorithmName signerHashAlgorithm,
out int bytesConsumed,
CertificateRequestLoadOptions options = CertificateRequestLoadOptions.Default,
RSASignaturePadding?signerSignaturePadding = null)
{
return(LoadSigningRequest(
pkcs10,
permitTrailingData: true,
signerHashAlgorithm,
out bytesConsumed,
options,
signerSignaturePadding));
}
public static CertificateRequest LoadSigningRequest(
byte[] pkcs10,
HashAlgorithmName signerHashAlgorithm,
CertificateRequestLoadOptions options = CertificateRequestLoadOptions.Default,
RSASignaturePadding?signerSignaturePadding = null)
{
ArgumentNullException.ThrowIfNull(pkcs10);
return(LoadSigningRequest(
pkcs10,
permitTrailingData: false,
signerHashAlgorithm,
out _,
options,
signerSignaturePadding));
}
public static CertificateRequest LoadSigningRequestPem(
ReadOnlySpan <char> pkcs10Pem,
HashAlgorithmName signerHashAlgorithm,
CertificateRequestLoadOptions options = CertificateRequestLoadOptions.Default,
RSASignaturePadding?signerSignaturePadding = null)
{
ArgumentException.ThrowIfNullOrEmpty(signerHashAlgorithm.Name, nameof(signerHashAlgorithm));
if ((options & ~AllOptions) != 0)
{
throw new ArgumentOutOfRangeException(nameof(options), options, SR.Argument_InvalidFlag);
}
foreach ((ReadOnlySpan <char> contents, PemFields fields) in new PemEnumerator(pkcs10Pem))
{
if (contents[fields.Label].SequenceEqual(PemLabels.Pkcs10CertificateRequest))
{
byte[] rented = ArrayPool <byte> .Shared.Rent(fields.DecodedDataLength);
if (!Convert.TryFromBase64Chars(contents[fields.Base64Data], rented, out int bytesWritten) ||
bytesWritten != fields.DecodedDataLength)
{
Debug.Fail("Base64Decode failed, but PemEncoding said it was legal");
throw new UnreachableException();
}
try
{
return(LoadSigningRequest(
rented.AsSpan(0, bytesWritten),
permitTrailingData: false,
signerHashAlgorithm,
out _,
options,
signerSignaturePadding));
}
finally
{
ArrayPool <byte> .Shared.Return(rented);
}
}
}
throw new CryptographicException(
SR.Format(SR.Cryptography_NoPemOfLabel, PemLabels.Pkcs10CertificateRequest));
}
public static void LoadBigExponentRequest_Span(CertificateRequestLoadOptions options, bool oversized)
{
byte[] pkcs10 = TestData.BigExponentPkcs10Bytes;
if (oversized)
{
Array.Resize(ref pkcs10, pkcs10.Length + 22);
}
CertificateRequest req = CertificateRequest.LoadSigningRequest(
new ReadOnlySpan <byte>(pkcs10),
HashAlgorithmName.SHA256,
out int bytesConsumed,
options);
Assert.Equal(TestData.BigExponentPkcs10Bytes.Length, bytesConsumed);
Assert.Equal(HashAlgorithmName.SHA256, req.HashAlgorithm);
VerifyBigExponentRequest(req, options);
}
public static void LoadWithUnknownOptions(int optionsValue)
{
CertificateRequestLoadOptions options = (CertificateRequestLoadOptions)optionsValue;
HashAlgorithmName hashAlgorithm = HashAlgorithmName.SHA256;
ArgumentOutOfRangeException ex;
ex = Assert.Throws <ArgumentOutOfRangeException>(
"options",
() => CertificateRequest.LoadSigningRequest(Array.Empty <byte>(), hashAlgorithm, options));
Assert.Equal(options, ex.ActualValue);
{
int consumed = -1;
ex = Assert.Throws <ArgumentOutOfRangeException>(
"options",
() => CertificateRequest.LoadSigningRequest(
ReadOnlySpan <byte> .Empty,
hashAlgorithm,
out consumed,
options));
Assert.Equal(-1, consumed);
Assert.Equal(options, ex.ActualValue);
}
ex = Assert.Throws <ArgumentOutOfRangeException>(
"options",
() => CertificateRequest.LoadSigningRequestPem(string.Empty, hashAlgorithm, options));
Assert.Equal(options, ex.ActualValue);
ex = Assert.Throws <ArgumentOutOfRangeException>(
"options",
() => CertificateRequest.LoadSigningRequestPem(
ReadOnlySpan <char> .Empty,
hashAlgorithm,
options));
Assert.Equal(options, ex.ActualValue);
}
private static unsafe CertificateRequest LoadSigningRequest(
ReadOnlySpan <byte> pkcs10,
bool permitTrailingData,
HashAlgorithmName signerHashAlgorithm,
out int bytesConsumed,
CertificateRequestLoadOptions options,
RSASignaturePadding?signerSignaturePadding)
{
ArgumentException.ThrowIfNullOrEmpty(signerHashAlgorithm.Name, nameof(signerHashAlgorithm));
if ((options & ~AllOptions) != 0)
{
throw new ArgumentOutOfRangeException(nameof(options), options, SR.Argument_InvalidFlag);
}
bool skipSignatureValidation =
(options & CertificateRequestLoadOptions.SkipSignatureValidation) != 0;
bool unsafeLoadCertificateExtensions =
(options & CertificateRequestLoadOptions.UnsafeLoadCertificateExtensions) != 0;
try
{
AsnValueReader outer = new AsnValueReader(pkcs10, AsnEncodingRules.DER);
int encodedLength = outer.PeekEncodedValue().Length;
AsnValueReader pkcs10Asn = outer.ReadSequence();
CertificateRequest req;
if (!permitTrailingData)
{
outer.ThrowIfNotEmpty();
}
fixed(byte *p10ptr = pkcs10)
{
using (PointerMemoryManager <byte> manager = new PointerMemoryManager <byte>(p10ptr, encodedLength))
{
ReadOnlyMemory <byte> rebind = manager.Memory;
ReadOnlySpan <byte> encodedRequestInfo = pkcs10Asn.PeekEncodedValue();
CertificationRequestInfoAsn requestInfo;
AlgorithmIdentifierAsn algorithmIdentifier;
ReadOnlySpan <byte> signature;
int signatureUnusedBitCount;
CertificationRequestInfoAsn.Decode(ref pkcs10Asn, rebind, out requestInfo);
AlgorithmIdentifierAsn.Decode(ref pkcs10Asn, rebind, out algorithmIdentifier);
if (!pkcs10Asn.TryReadPrimitiveBitString(out signatureUnusedBitCount, out signature))
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
pkcs10Asn.ThrowIfNotEmpty();
if (requestInfo.Version < 0)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
// They haven't bumped from v0 to v1 as of 2022.
const int MaxSupportedVersion = 0;
if (requestInfo.Version != MaxSupportedVersion)
{
throw new CryptographicException(
SR.Format(
SR.Cryptography_CertReq_Load_VersionTooNew,
requestInfo.Version,
MaxSupportedVersion));
}
PublicKey publicKey = PublicKey.DecodeSubjectPublicKeyInfo(ref requestInfo.SubjectPublicKeyInfo);
if (!skipSignatureValidation)
{
// None of the supported signature algorithms support signatures that are not full bytes.
// So, shortcut the verification on the bit length
if (signatureUnusedBitCount != 0 ||
!VerifyX509Signature(encodedRequestInfo, signature, publicKey, algorithmIdentifier))
{
throw new CryptographicException(SR.Cryptography_CertReq_SignatureVerificationFailed);
}
}
X500DistinguishedName subject = new X500DistinguishedName(requestInfo.Subject.Span);
req = new CertificateRequest(
subject,
publicKey,
signerHashAlgorithm,
signerSignaturePadding);
if (requestInfo.Attributes is not null)
{
bool foundCertExt = false;
foreach (AttributeAsn attr in requestInfo.Attributes)
{
if (attr.AttrType == Oids.Pkcs9ExtensionRequest)
{
if (foundCertExt)
{
throw new CryptographicException(
SR.Cryptography_CertReq_Load_DuplicateExtensionRequests);
}
foundCertExt = true;
if (attr.AttrValues.Length != 1)
{
throw new CryptographicException(
SR.Cryptography_CertReq_Load_DuplicateExtensionRequests);
}
AsnValueReader extsReader = new AsnValueReader(
attr.AttrValues[0].Span,
AsnEncodingRules.DER);
AsnValueReader exts = extsReader.ReadSequence();
extsReader.ThrowIfNotEmpty();
// Minimum length is 1, so do..while
do
{
X509ExtensionAsn.Decode(ref exts, rebind, out X509ExtensionAsn extAsn);
if (unsafeLoadCertificateExtensions)
{
X509Extension ext = new X509Extension(
extAsn.ExtnId,
extAsn.ExtnValue.Span,
extAsn.Critical);
X509Extension?rich =
X509Certificate2.CreateCustomExtensionIfAny(extAsn.ExtnId);
if (rich is not null)
{
rich.CopyFrom(ext);
req.CertificateExtensions.Add(rich);
}
else
{
req.CertificateExtensions.Add(ext);
}
}
} while (exts.HasData);
}
else
{
if (attr.AttrValues.Length == 0)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
foreach (ReadOnlyMemory <byte> val in attr.AttrValues)
{
req.OtherRequestAttributes.Add(
new AsnEncodedData(attr.AttrType, val.Span));
}
}
}
}
}
}
bytesConsumed = encodedLength;
return(req);
}
catch (AsnContentException e)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding, e);
}
}