diff options
Diffstat (limited to 'libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceAlgorithmIdentifierConverter.java')
-rw-r--r-- | libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceAlgorithmIdentifierConverter.java | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceAlgorithmIdentifierConverter.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceAlgorithmIdentifierConverter.java new file mode 100644 index 000000000..32007919e --- /dev/null +++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/JceAlgorithmIdentifierConverter.java @@ -0,0 +1,64 @@ +package org.spongycastle.cms.jcajce; + + +import java.security.AlgorithmParameters; +import java.security.NoSuchAlgorithmException; +import java.security.NoSuchProviderException; +import java.security.Provider; +import java.security.SecureRandom; + +import org.spongycastle.asn1.ASN1Encodable; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.cms.CMSException; + +public class JceAlgorithmIdentifierConverter +{ + private EnvelopedDataHelper helper = new EnvelopedDataHelper(new DefaultJcaJceExtHelper()); + private SecureRandom random; + + public JceAlgorithmIdentifierConverter() + { + } + + public JceAlgorithmIdentifierConverter setProvider(Provider provider) + { + this.helper = new EnvelopedDataHelper(new ProviderJcaJceExtHelper(provider)); + + return this; + } + + public JceAlgorithmIdentifierConverter setProvider(String providerName) + { + this.helper = new EnvelopedDataHelper(new NamedJcaJceExtHelper(providerName)); + + return this; + } + + public AlgorithmParameters getAlgorithmParameters(AlgorithmIdentifier algorithmIdentifier) + throws CMSException + { + ASN1Encodable parameters = algorithmIdentifier.getParameters(); + + if (parameters == null) + { + return null; + } + + try + { + AlgorithmParameters params = helper.createAlgorithmParameters(algorithmIdentifier.getAlgorithm()); + + CMSUtils.loadParameters(params, algorithmIdentifier.getParameters()); + + return params; + } + catch (NoSuchAlgorithmException e) + { + throw new CMSException("can't find parameters for algorithm", e); + } + catch (NoSuchProviderException e) + { + throw new CMSException("can't find provider for algorithm", e); + } + } +} |