File	Doc	Category	Size	Date	Package
AlgNameMapper.java	API Doc	Android 1.5 API	9551	Wed May 06 22:41:06 BST 2009	org.apache.harmony.security.utils

AlgNameMapper

• java.lang.Object

Fields Summary
private static final String[]	serviceName
private static final String[]	knownAlgMappings
private static final Map	alg2OidMap
private static final Map	oid2AlgMap
private static final Map	algAliasesMap

Constructors Summary

private AlgNameMapper() for (String[] element : knownAlgMappings) { String algUC = element[1].toUpperCase(); alg2OidMap.put(algUC, element[0]); oid2AlgMap.put(element[0], algUC); // map upper case alg name to its original name algAliasesMap.put(algUC, element[1]); } // // Now search providers for mappings like // Alg.Alias.<service>.<OID-INTS-DOT-SEPARATED>=<alg-name> // or // Alg.Alias.<service>.OID.<OID-INTS-DOT-SEPARATED>=<alg-name> // Provider[] pl = Security.getProviders(); for (Provider element : pl) { selectEntries(element); }

Methods Summary
public static java.lang.String	dump() Present all internal maps as formatted string return Internal maps String representation StringBuffer sb = new StringBuffer("alg2OidMap: "); //$NON-NLS-1$ sb.append(alg2OidMap); sb.append("\noid2AlgMap: "); //$NON-NLS-1$ sb.append(oid2AlgMap); sb.append("\nalgAliasesMap: "); //$NON-NLS-1$ sb.append(algAliasesMap); return sb.toString();
public static java.lang.String	getStandardName(java.lang.String algName) Returns Algorithm name for given algorithm alias param algName - alias return algorithm name return algAliasesMap.get(algName.toUpperCase());
public static boolean	isOID(java.lang.String alias) Checks if parameter represents OID param alias alias to be checked return 'true' if parameter represents OID // BEGIN android-changed return ObjectIdentifier.isOID(normalize(alias)); // END android-changed
public static java.lang.String	map2AlgName(java.lang.String oid) Returns algName for OID param oid OID to be mapped return algorithm name // oid2AlgMap map contains upper case values String algUC = oid2AlgMap.get(oid); // if not null there is always map UC->Orig return algUC == null ? null : algAliasesMap.get(algUC);
public static java.lang.String	map2OID(java.lang.String algName) Returns OID for algName param algName algorithm name to be mapped return OID as String // alg2OidMap map contains upper case keys return alg2OidMap.get(algName.toUpperCase());
public static java.lang.String	normalize(java.lang.String oid) Removes leading "OID." from oid String passed param oid string that may contain leading "OID." return string passed without leading "OID." return oid.startsWith("OID.") //$NON-NLS-1$ ? oid.substring(4) : oid;
private static void	selectEntries(java.security.Provider p) Set<Map.Entry<Object, Object>> entrySet = p.entrySet(); for (String service : serviceName) { String keyPrfix2find = "Alg.Alias." + service + "."; //$NON-NLS-1$ //$NON-NLS-2$ for (Entry<Object, Object> me : entrySet) { String key = (String)me.getKey(); if (key.startsWith(keyPrfix2find)) { String alias = key.substring(keyPrfix2find.length()); String alg = (String)me.getValue(); String algUC = alg.toUpperCase(); if (isOID(alias)) { if (alias.startsWith("OID.")) { //$NON-NLS-1$ alias = alias.substring(4); } // Do not overwrite already known mappings boolean oid2AlgContains = oid2AlgMap.containsKey(alias); boolean alg2OidContains = alg2OidMap.containsKey(algUC); if (!oid2AlgContains || !alg2OidContains) { if (!oid2AlgContains) { oid2AlgMap.put(alias, algUC); } if (!alg2OidContains) { alg2OidMap.put(algUC, alias); } // map upper case alg name to its original name algAliasesMap.put(algUC, alg); } // Do not override known standard names } else if (!algAliasesMap.containsKey(alias.toUpperCase())) { algAliasesMap.put(alias.toUpperCase(), alg); } } } }