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getJavaCryptoProviders


Sometimes it is important to verify what providers are available in the current environment

The meat of JCEProviders is from:
https://stackoverflow.com/questions/3683302/how-to-find-out-what-algorithm-encryption-are-supported-by-my-jvm,
and ListProviders is from:
http://www.java2s.com/Code/Java/Security/ListAllProviderAndItsAlgorithms.htm

This code will list out the various crypto providers available to you.
It can be useful for a range of purposes. For example, use it when you can't remember the exact string identifying the signature algorithm you want to use.

These little programs spill a lot of information to the screen. I usually reduce the output with grep, like:

java ListProviders | grep -i keystore  
        KeyStore.JKS  
        KeyStore.CaseExactJKS  
        KeyStore.JKS ImplementedIn  
        KeyStore.DKS  
        KeyStore.PKCS12  
        KeyStore.JCEKS  
        KeyStore.Windows-ROOT  
        KeyStore.Windows-MY  

java JCEProviders | grep -i keystore  
        SUN: KeyStore.JKS -> sun.security.provider.JavaKeyStore$DualFormatJKS  
        SUN: KeyStore.CaseExactJKS -> sun.security.provider.JavaKeyStore$CaseExactJKS  
        SUN: KeyStore.DKS -> sun.security.provider.DomainKeyStore$DKS  
        SunJSSE: KeyStore.PKCS12 -> sun.security.pkcs12.PKCS12KeyStore  
        SunJCE: KeyStore.JCEKS -> com.sun.crypto.provider.JceKeyStore  
        SunMSCAPI: KeyStore.Windows-MY -> sun.security.mscapi.KeyStore$MY  
        SunMSCAPI: KeyStore.Windows-ROOT -> sun.security.mscapi.KeyStore$ROOT

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