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package org.apache.myfaces.application.viewstate; |
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import javax.faces.context.FacesContext; |
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import org.apache.commons.codec.binary.Hex; |
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import org.apache.myfaces.application.StateCache; |
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import org.apache.myfaces.shared.util.WebConfigParamUtils; |
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class SecureRandomCsrfSessionTokenFactory extends CsrfSessionTokenFactory |
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{ |
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private final SessionIdGenerator sessionIdGenerator; |
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private final int length; |
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public SecureRandomCsrfSessionTokenFactory(FacesContext facesContext) |
40 | 0 | { |
41 | 0 | length = WebConfigParamUtils.getIntegerInitParameter( |
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facesContext.getExternalContext(), |
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StateCache.RANDOM_KEY_IN_CSRF_SESSION_TOKEN_LENGTH_PARAM, |
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StateCache.RANDOM_KEY_IN_CSRF_SESSION_TOKEN_LENGTH_PARAM_DEFAULT); |
45 | 0 | sessionIdGenerator = new SessionIdGenerator(); |
46 | 0 | sessionIdGenerator.setSessionIdLength(length); |
47 | 0 | String secureRandomClass = WebConfigParamUtils.getStringInitParameter( |
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facesContext.getExternalContext(), |
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StateCache.RANDOM_KEY_IN_CSRF_SESSION_TOKEN_SECURE_RANDOM_CLASS_PARAM); |
50 | 0 | if (secureRandomClass != null) |
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{ |
52 | 0 | sessionIdGenerator.setSecureRandomClass(secureRandomClass); |
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} |
54 | 0 | String secureRandomProvider = WebConfigParamUtils.getStringInitParameter( |
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facesContext.getExternalContext(), |
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StateCache.RANDOM_KEY_IN_CSRF_SESSION_TOKEN_SECURE_RANDOM_PROVIDER_PARAM); |
57 | 0 | if (secureRandomProvider != null) |
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{ |
59 | 0 | sessionIdGenerator.setSecureRandomProvider(secureRandomProvider); |
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} |
61 | 0 | String secureRandomAlgorithm = WebConfigParamUtils.getStringInitParameter( |
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facesContext.getExternalContext(), |
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StateCache.RANDOM_KEY_IN_CSRF_SESSION_TOKEN_SECURE_RANDOM_ALGORITM_PARAM); |
64 | 0 | if (secureRandomAlgorithm != null) |
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{ |
66 | 0 | sessionIdGenerator.setSecureRandomAlgorithm(secureRandomAlgorithm); |
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} |
68 | 0 | } |
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public byte[] generateKey(FacesContext facesContext) |
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{ |
72 | 0 | byte[] array = new byte[length]; |
73 | 0 | sessionIdGenerator.getRandomBytes(array); |
74 | 0 | return array; |
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} |
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@Override |
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public String createCryptographicallyStrongTokenFromSession(FacesContext context) |
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{ |
80 | 0 | byte[] key = generateKey(context); |
81 | 0 | return new String(Hex.encodeHex(key)); |
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} |
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} |