|
public GetAll ( |
||
| oid | ||
| return | ||
private Asn1Object GetSingleValuedSignedAttribute(DerObjectIdentifier attrOID, string printableName)
{
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = this.UnsignedAttributes;
if (unsignedAttributes != null && unsignedAttributes.GetAll(attrOID).Count > 0)
{
throw new CmsException("The " + printableName + " attribute MUST NOT be an unsigned attribute");
}
Org.BouncyCastle.Asn1.Cms.AttributeTable signedAttributes = this.SignedAttributes;
if (signedAttributes == null)
{
return(null);
}
Asn1EncodableVector all = signedAttributes.GetAll(attrOID);
switch (all.Count)
{
case 0:
return(null);
case 1:
{
Org.BouncyCastle.Asn1.Cms.Attribute attribute = (Org.BouncyCastle.Asn1.Cms.Attribute)all[0];
Asn1Set attrValues = attribute.AttrValues;
if (attrValues.Count != 1)
{
throw new CmsException("A " + printableName + " attribute MUST have a single attribute value");
}
return(attrValues[0].ToAsn1Object());
}
default:
throw new CmsException("The SignedAttributes in a signerInfo MUST NOT include multiple instances of the " + printableName + " attribute");
}
}
public SignerInformationStore GetCounterSignatures()
{
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = UnsignedAttributes;
if (unsignedAttributes == null)
{
return(new SignerInformationStore((global::System.Collections.ICollection)Platform.CreateArrayList(0)));
}
global::System.Collections.IList list = Platform.CreateArrayList();
Asn1EncodableVector all = unsignedAttributes.GetAll(CmsAttributes.CounterSignature);
global::System.Collections.IEnumerator enumerator = all.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
Attribute attribute = (Attribute)enumerator.get_Current();
Asn1Set attrValues = attribute.AttrValues;
_ = attrValues.Count;
_ = 1;
{
global::System.Collections.IEnumerator enumerator2 = attrValues.GetEnumerator();
try
{
while (enumerator2.MoveNext())
{
Asn1Encodable asn1Encodable = (Asn1Encodable)enumerator2.get_Current();
Org.BouncyCastle.Asn1.Cms.SignerInfo instance = Org.BouncyCastle.Asn1.Cms.SignerInfo.GetInstance(asn1Encodable.ToAsn1Object());
string digestAlgName = CmsSignedHelper.Instance.GetDigestAlgName(instance.DigestAlgorithm.Algorithm.Id);
list.Add((object)new SignerInformation(instance, null, null, new CounterSignatureDigestCalculator(digestAlgName, GetSignature())));
}
}
finally
{
global::System.IDisposable disposable2 = enumerator2 as global::System.IDisposable;
if (disposable2 != null)
{
disposable2.Dispose();
}
}
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
return(new SignerInformationStore((global::System.Collections.ICollection)list));
}
public SignerInformationStore GetCounterSignatures()
{
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = this.UnsignedAttributes;
if (unsignedAttributes == null)
{
return(new SignerInformationStore(Platform.CreateArrayList(0)));
}
IList list = Platform.CreateArrayList();
Asn1EncodableVector all = unsignedAttributes.GetAll(CmsAttributes.CounterSignature);
foreach (Org.BouncyCastle.Asn1.Cms.Attribute attribute in all)
{
Asn1Set attrValues = attribute.AttrValues;
int arg_53_0 = attrValues.Count;
foreach (Asn1Encodable asn1Encodable in attrValues)
{
Org.BouncyCastle.Asn1.Cms.SignerInfo instance = Org.BouncyCastle.Asn1.Cms.SignerInfo.GetInstance(asn1Encodable.ToAsn1Object());
string digestAlgName = CmsSignedHelper.Instance.GetDigestAlgName(instance.DigestAlgorithm.ObjectID.Id);
list.Add(new SignerInformation(instance, null, null, new CounterSignatureDigestCalculator(digestAlgName, this.GetSignature())));
}
}
return(new SignerInformationStore(list));
}
public static ICollection GetSignatureTimestamps(SignerInformation signerInfo)
{
IList list = Platform.CreateArrayList();
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = signerInfo.UnsignedAttributes;
if (unsignedAttributes != null)
{
foreach (Org.BouncyCastle.Asn1.Cms.Attribute item in unsignedAttributes.GetAll(PkcsObjectIdentifiers.IdAASignatureTimeStampToken))
{
foreach (Asn1Encodable attrValue in item.AttrValues)
{
try
{
Org.BouncyCastle.Asn1.Cms.ContentInfo instance = Org.BouncyCastle.Asn1.Cms.ContentInfo.GetInstance(attrValue.ToAsn1Object());
TimeStampToken timeStampToken = new TimeStampToken(instance);
TimeStampTokenInfo timeStampInfo = timeStampToken.TimeStampInfo;
byte[] a = DigestUtilities.CalculateDigest(GetDigestAlgName(timeStampInfo.MessageImprintAlgOid), signerInfo.GetSignature());
if (!Arrays.ConstantTimeAreEqual(a, timeStampInfo.GetMessageImprintDigest()))
{
throw new TspValidationException("Incorrect digest in message imprint");
}
list.Add(timeStampToken);
}
catch (SecurityUtilityException)
{
throw new TspValidationException("Unknown hash algorithm specified in timestamp");
}
catch (Exception)
{
throw new TspValidationException("Timestamp could not be parsed");
}
}
}
return(list);
}
return(list);
}
public override void PerformTest()
{
Asn1EncodableVector v = new Asn1EncodableVector(
new Asn1Cms.Attribute(type1, new DerSet(type1)),
new Asn1Cms.Attribute(type2, new DerSet(type2)));
Asn1Cms.AttributeTable table = new Asn1Cms.AttributeTable(v);
Asn1Cms.Attribute a = table[type1];
if (a == null)
{
Fail("type1 attribute not found.");
}
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1!");
}
a = table[type2];
if (a == null)
{
Fail("type2 attribute not found.");
}
if (!a.AttrValues.Equals(new DerSet(type2)))
{
Fail("wrong value retrieved for type2!");
}
a = table[type3];
if (a != null)
{
Fail("type3 attribute found when none expected.");
}
Asn1EncodableVector vec = table.GetAll(type1);
if (vec.Count != 1)
{
Fail("wrong vector size for type1.");
}
vec = table.GetAll(type3);
if (vec.Count != 0)
{
Fail("wrong vector size for type3.");
}
vec = table.ToAsn1EncodableVector();
if (vec.Count != 2)
{
Fail("wrong vector size for single.");
}
IDictionary t = table.ToDictionary();
if (t.Count != 2)
{
Fail("hashtable wrong size.");
}
// multiple
v = new Asn1EncodableVector(
new Asn1Cms.Attribute(type1, new DerSet(type1)),
new Asn1Cms.Attribute(type1, new DerSet(type2)),
new Asn1Cms.Attribute(type1, new DerSet(type3)),
new Asn1Cms.Attribute(type2, new DerSet(type2)));
table = new Asn1Cms.AttributeTable(v);
a = table[type1];
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1 multi Get!");
}
vec = table.GetAll(type1);
if (vec.Count != 3)
{
Fail("wrong vector size for multiple type1.");
}
a = (Asn1Cms.Attribute)vec[0];
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1(0)!");
}
a = (Asn1Cms.Attribute)vec[1];
if (!a.AttrValues.Equals(new DerSet(type2)))
{
Fail("wrong value retrieved for type1(1)!");
}
a = (Asn1Cms.Attribute)vec[2];
if (!a.AttrValues.Equals(new DerSet(type3)))
{
Fail("wrong value retrieved for type1(2)!");
}
vec = table.GetAll(type2);
if (vec.Count != 1)
{
Fail("wrong vector size for multiple type2.");
}
vec = table.ToAsn1EncodableVector();
if (vec.Count != 4)
{
Fail("wrong vector size for multiple.");
}
}
private bool DoVerify(AsymmetricKeyParameter key)
{
string digestAlgName = SignerInformation.Helper.GetDigestAlgName(this.DigestAlgOid);
IDigest digestInstance = SignerInformation.Helper.GetDigestInstance(digestAlgName);
DerObjectIdentifier objectID = this.encryptionAlgorithm.ObjectID;
Asn1Encodable parameters = this.encryptionAlgorithm.Parameters;
ISigner signer;
if (objectID.Equals(PkcsObjectIdentifiers.IdRsassaPss))
{
if (parameters == null)
{
throw new CmsException("RSASSA-PSS signature must specify algorithm parameters");
}
try
{
RsassaPssParameters instance = RsassaPssParameters.GetInstance(parameters.ToAsn1Object());
if (!instance.HashAlgorithm.ObjectID.Equals(this.digestAlgorithm.ObjectID))
{
throw new CmsException("RSASSA-PSS signature parameters specified incorrect hash algorithm");
}
if (!instance.MaskGenAlgorithm.ObjectID.Equals(PkcsObjectIdentifiers.IdMgf1))
{
throw new CmsException("RSASSA-PSS signature parameters specified unknown MGF");
}
IDigest digest = DigestUtilities.GetDigest(instance.HashAlgorithm.ObjectID);
int intValue = instance.SaltLength.Value.IntValue;
byte b = (byte)instance.TrailerField.Value.IntValue;
if (b != 1)
{
throw new CmsException("RSASSA-PSS signature parameters must have trailerField of 1");
}
signer = new PssSigner(new RsaBlindedEngine(), digest, intValue);
goto IL_142;
}
catch (Exception e)
{
throw new CmsException("failed to set RSASSA-PSS signature parameters", e);
}
}
string algorithm = digestAlgName + "with" + SignerInformation.Helper.GetEncryptionAlgName(this.EncryptionAlgOid);
signer = SignerInformation.Helper.GetSignatureInstance(algorithm);
try
{
IL_142:
if (this.digestCalculator != null)
{
this.resultDigest = this.digestCalculator.GetDigest();
}
else
{
if (this.content != null)
{
this.content.Write(new DigOutputStream(digestInstance));
}
else if (this.signedAttributeSet == null)
{
throw new CmsException("data not encapsulated in signature - use detached constructor.");
}
this.resultDigest = DigestUtilities.DoFinal(digestInstance);
}
}
catch (IOException e2)
{
throw new CmsException("can't process mime object to create signature.", e2);
}
Asn1Object singleValuedSignedAttribute = this.GetSingleValuedSignedAttribute(CmsAttributes.ContentType, "content-type");
if (singleValuedSignedAttribute == null)
{
if (!this.isCounterSignature && this.signedAttributeSet != null)
{
throw new CmsException("The content-type attribute type MUST be present whenever signed attributes are present in signed-data");
}
}
else
{
if (this.isCounterSignature)
{
throw new CmsException("[For counter signatures,] the signedAttributes field MUST NOT contain a content-type attribute");
}
if (!(singleValuedSignedAttribute is DerObjectIdentifier))
{
throw new CmsException("content-type attribute value not of ASN.1 type 'OBJECT IDENTIFIER'");
}
DerObjectIdentifier derObjectIdentifier = (DerObjectIdentifier)singleValuedSignedAttribute;
if (!derObjectIdentifier.Equals(this.contentType))
{
throw new CmsException("content-type attribute value does not match eContentType");
}
}
Asn1Object singleValuedSignedAttribute2 = this.GetSingleValuedSignedAttribute(CmsAttributes.MessageDigest, "message-digest");
if (singleValuedSignedAttribute2 == null)
{
if (this.signedAttributeSet != null)
{
throw new CmsException("the message-digest signed attribute type MUST be present when there are any signed attributes present");
}
}
else
{
if (!(singleValuedSignedAttribute2 is Asn1OctetString))
{
throw new CmsException("message-digest attribute value not of ASN.1 type 'OCTET STRING'");
}
Asn1OctetString asn1OctetString = (Asn1OctetString)singleValuedSignedAttribute2;
if (!Arrays.AreEqual(this.resultDigest, asn1OctetString.GetOctets()))
{
throw new CmsException("message-digest attribute value does not match calculated value");
}
}
Org.BouncyCastle.Asn1.Cms.AttributeTable signedAttributes = this.SignedAttributes;
if (signedAttributes != null && signedAttributes.GetAll(CmsAttributes.CounterSignature).Count > 0)
{
throw new CmsException("A countersignature attribute MUST NOT be a signed attribute");
}
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = this.UnsignedAttributes;
if (unsignedAttributes != null)
{
foreach (Org.BouncyCastle.Asn1.Cms.Attribute attribute in unsignedAttributes.GetAll(CmsAttributes.CounterSignature))
{
if (attribute.AttrValues.Count < 1)
{
throw new CmsException("A countersignature attribute MUST contain at least one AttributeValue");
}
}
}
bool result;
try
{
signer.Init(false, key);
if (this.signedAttributeSet == null)
{
if (this.digestCalculator != null)
{
result = this.VerifyDigest(this.resultDigest, key, this.GetSignature());
return(result);
}
if (this.content != null)
{
this.content.Write(new SigOutputStream(signer));
}
}
else
{
byte[] encodedSignedAttributes = this.GetEncodedSignedAttributes();
signer.BlockUpdate(encodedSignedAttributes, 0, encodedSignedAttributes.Length);
}
result = signer.VerifySignature(this.GetSignature());
}
catch (InvalidKeyException e3)
{
throw new CmsException("key not appropriate to signature in message.", e3);
}
catch (IOException e4)
{
throw new CmsException("can't process mime object to create signature.", e4);
}
catch (SignatureException ex)
{
throw new CmsException("invalid signature format in message: " + ex.Message, ex);
}
return(result);
}
public override void PerformTest()
{
Asn1EncodableVector v = new Asn1EncodableVector(
new Asn1Cms.Attribute(type1, new DerSet(type1)),
new Asn1Cms.Attribute(type2, new DerSet(type2)));
Asn1Cms.AttributeTable table = new Asn1Cms.AttributeTable(v);
Asn1Cms.Attribute a = table[type1];
if (a == null)
{
Fail("type1 attribute not found.");
}
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1!");
}
a = table[type2];
if (a == null)
{
Fail("type2 attribute not found.");
}
if (!a.AttrValues.Equals(new DerSet(type2)))
{
Fail("wrong value retrieved for type2!");
}
a = table[type3];
if (a != null)
{
Fail("type3 attribute found when none expected.");
}
Asn1EncodableVector vec = table.GetAll(type1);
if (vec.Count != 1)
{
Fail("wrong vector size for type1.");
}
vec = table.GetAll(type3);
if (vec.Count != 0)
{
Fail("wrong vector size for type3.");
}
vec = table.ToAsn1EncodableVector();
if (vec.Count != 2)
{
Fail("wrong vector size for single.");
}
IDictionary t = table.ToDictionary();
if (t.Count != 2)
{
Fail("hashtable wrong size.");
}
// multiple
v = new Asn1EncodableVector(
new Asn1Cms.Attribute(type1, new DerSet(type1)),
new Asn1Cms.Attribute(type1, new DerSet(type2)),
new Asn1Cms.Attribute(type1, new DerSet(type3)),
new Asn1Cms.Attribute(type2, new DerSet(type2)));
table = new Asn1Cms.AttributeTable(v);
a = table[type1];
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1 multi Get!");
}
vec = table.GetAll(type1);
if (vec.Count != 3)
{
Fail("wrong vector size for multiple type1.");
}
a = (Asn1Cms.Attribute)vec[0];
if (!a.AttrValues.Equals(new DerSet(type1)))
{
Fail("wrong value retrieved for type1(0)!");
}
a = (Asn1Cms.Attribute)vec[1];
if (!a.AttrValues.Equals(new DerSet(type2)))
{
Fail("wrong value retrieved for type1(1)!");
}
a = (Asn1Cms.Attribute)vec[2];
if (!a.AttrValues.Equals(new DerSet(type3)))
{
Fail("wrong value retrieved for type1(2)!");
}
vec = table.GetAll(type2);
if (vec.Count != 1)
{
Fail("wrong vector size for multiple type2.");
}
vec = table.ToAsn1EncodableVector();
if (vec.Count != 4)
{
Fail("wrong vector size for multiple.");
}
}
public static global::System.Collections.ICollection GetSignatureTimestamps(SignerInformation signerInfo)
{
global::System.Collections.IList list = Platform.CreateArrayList();
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = signerInfo.UnsignedAttributes;
if (unsignedAttributes != null)
{
global::System.Collections.IEnumerator enumerator = unsignedAttributes.GetAll(PkcsObjectIdentifiers.IdAASignatureTimeStampToken).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
Attribute attribute = (Attribute)enumerator.get_Current();
{
global::System.Collections.IEnumerator enumerator2 = attribute.AttrValues.GetEnumerator();
try
{
while (enumerator2.MoveNext())
{
Asn1Encodable asn1Encodable = (Asn1Encodable)enumerator2.get_Current();
try
{
Org.BouncyCastle.Asn1.Cms.ContentInfo instance = Org.BouncyCastle.Asn1.Cms.ContentInfo.GetInstance(asn1Encodable.ToAsn1Object());
TimeStampToken timeStampToken = new TimeStampToken(instance);
TimeStampTokenInfo timeStampInfo = timeStampToken.TimeStampInfo;
byte[] a = DigestUtilities.CalculateDigest(GetDigestAlgName(timeStampInfo.MessageImprintAlgOid), signerInfo.GetSignature());
if (!Arrays.ConstantTimeAreEqual(a, timeStampInfo.GetMessageImprintDigest()))
{
throw new TspValidationException("Incorrect digest in message imprint");
}
list.Add((object)timeStampToken);
}
catch (SecurityUtilityException)
{
throw new TspValidationException("Unknown hash algorithm specified in timestamp");
}
catch (global::System.Exception)
{
throw new TspValidationException("Timestamp could not be parsed");
}
}
}
finally
{
global::System.IDisposable disposable2 = enumerator2 as global::System.IDisposable;
if (disposable2 != null)
{
disposable2.Dispose();
}
}
}
}
return((global::System.Collections.ICollection)list);
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
return((global::System.Collections.ICollection)list);
}
private bool DoVerify(AsymmetricKeyParameter key)
{
//IL_019b: Expected O, but got Unknown
//IL_03a0: Expected O, but got Unknown
string digestAlgName = Helper.GetDigestAlgName(DigestAlgOid);
IDigest digestInstance = Helper.GetDigestInstance(digestAlgName);
DerObjectIdentifier algorithm = encryptionAlgorithm.Algorithm;
Asn1Encodable parameters = encryptionAlgorithm.Parameters;
ISigner signer;
if (algorithm.Equals(PkcsObjectIdentifiers.IdRsassaPss))
{
if (parameters == null)
{
throw new CmsException("RSASSA-PSS signature must specify algorithm parameters");
}
try
{
RsassaPssParameters instance = RsassaPssParameters.GetInstance(parameters.ToAsn1Object());
if (!instance.HashAlgorithm.Algorithm.Equals(digestAlgorithm.Algorithm))
{
throw new CmsException("RSASSA-PSS signature parameters specified incorrect hash algorithm");
}
if (!instance.MaskGenAlgorithm.Algorithm.Equals(PkcsObjectIdentifiers.IdMgf1))
{
throw new CmsException("RSASSA-PSS signature parameters specified unknown MGF");
}
IDigest digest = DigestUtilities.GetDigest(instance.HashAlgorithm.Algorithm);
int intValue = instance.SaltLength.Value.IntValue;
byte b = (byte)instance.TrailerField.Value.IntValue;
if (b != 1)
{
throw new CmsException("RSASSA-PSS signature parameters must have trailerField of 1");
}
signer = new PssSigner(new RsaBlindedEngine(), digest, intValue);
}
catch (global::System.Exception e)
{
throw new CmsException("failed to set RSASSA-PSS signature parameters", e);
}
}
else
{
string algorithm2 = digestAlgName + "with" + Helper.GetEncryptionAlgName(EncryptionAlgOid);
signer = Helper.GetSignatureInstance(algorithm2);
}
try
{
if (digestCalculator != null)
{
resultDigest = digestCalculator.GetDigest();
}
else
{
if (content != null)
{
content.Write((Stream)(object)new DigOutputStream(digestInstance));
}
else if (signedAttributeSet == null)
{
throw new CmsException("data not encapsulated in signature - use detached constructor.");
}
resultDigest = DigestUtilities.DoFinal(digestInstance);
}
}
catch (IOException val)
{
IOException e2 = val;
throw new CmsException("can't process mime object to create signature.", (global::System.Exception)(object) e2);
}
Asn1Object singleValuedSignedAttribute = GetSingleValuedSignedAttribute(CmsAttributes.ContentType, "content-type");
if (singleValuedSignedAttribute == null)
{
if (!isCounterSignature && signedAttributeSet != null)
{
throw new CmsException("The content-type attribute type MUST be present whenever signed attributes are present in signed-data");
}
}
else
{
if (isCounterSignature)
{
throw new CmsException("[For counter signatures,] the signedAttributes field MUST NOT contain a content-type attribute");
}
if (!(singleValuedSignedAttribute is DerObjectIdentifier))
{
throw new CmsException("content-type attribute value not of ASN.1 type 'OBJECT IDENTIFIER'");
}
DerObjectIdentifier derObjectIdentifier = (DerObjectIdentifier)singleValuedSignedAttribute;
if (!derObjectIdentifier.Equals(contentType))
{
throw new CmsException("content-type attribute value does not match eContentType");
}
}
Asn1Object singleValuedSignedAttribute2 = GetSingleValuedSignedAttribute(CmsAttributes.MessageDigest, "message-digest");
if (singleValuedSignedAttribute2 == null)
{
if (signedAttributeSet != null)
{
throw new CmsException("the message-digest signed attribute type MUST be present when there are any signed attributes present");
}
}
else
{
if (!(singleValuedSignedAttribute2 is Asn1OctetString))
{
throw new CmsException("message-digest attribute value not of ASN.1 type 'OCTET STRING'");
}
Asn1OctetString asn1OctetString = (Asn1OctetString)singleValuedSignedAttribute2;
if (!Arrays.AreEqual(resultDigest, asn1OctetString.GetOctets()))
{
throw new CmsException("message-digest attribute value does not match calculated value");
}
}
Org.BouncyCastle.Asn1.Cms.AttributeTable signedAttributes = SignedAttributes;
if (signedAttributes != null && signedAttributes.GetAll(CmsAttributes.CounterSignature).Count > 0)
{
throw new CmsException("A countersignature attribute MUST NOT be a signed attribute");
}
Org.BouncyCastle.Asn1.Cms.AttributeTable unsignedAttributes = UnsignedAttributes;
if (unsignedAttributes != null)
{
{
global::System.Collections.IEnumerator enumerator = unsignedAttributes.GetAll(CmsAttributes.CounterSignature).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
Attribute attribute = (Attribute)enumerator.get_Current();
if (attribute.AttrValues.Count < 1)
{
throw new CmsException("A countersignature attribute MUST contain at least one AttributeValue");
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
}
try
{
signer.Init(forSigning: false, key);
if (signedAttributeSet == null)
{
if (digestCalculator != null)
{
return(VerifyDigest(resultDigest, key, GetSignature()));
}
if (content != null)
{
content.Write((Stream)(object)new SigOutputStream(signer));
}
}
else
{
byte[] encodedSignedAttributes = GetEncodedSignedAttributes();
signer.BlockUpdate(encodedSignedAttributes, 0, encodedSignedAttributes.Length);
}
return(signer.VerifySignature(GetSignature()));
}
catch (InvalidKeyException e3)
{
throw new CmsException("key not appropriate to signature in message.", e3);
}
catch (IOException val2)
{
IOException e4 = val2;
throw new CmsException("can't process mime object to create signature.", (global::System.Exception)(object) e4);
}
catch (SignatureException ex)
{
throw new CmsException("invalid signature format in message: " + ((global::System.Exception)ex).get_Message(), ex);
}
}