Mercurial > hg > icedtea14
changeset 2564:1b3c4b985949
PR2369: SunEC provider is partially installed
2015-05-20 Andrew John Hughes <gnu_andrew@member.fsf.org>
PR2369: SunEC provider is partially installed
* TestCryptoLevel.java: Moved to...
* Makefile.am:
(ECC_CHECK_BUILD_DIR): Added.
(CRYPTO_CHECK_SRCS): Update TestCryptoLevel.java
path.
(ECC_CHECK_SRCS): Added.
(ICEDTEA_PATCHES): Re-add updated disable-intree-ec.patch
(EXTRA_DIST): Add ECC_CHECK_SRCS.
(check-local): Add check-ecc.stamp.
(clean-tests): Add clean-check-ecc.
(clean-local): Add clean-ecccheck.
(.PHONY). ADd clean-ecccheck and clean-check-ecc.
(ecccheck): Build ECC check test.
(clean-ecccheck): Cleanup ECC check test.
(check-ecc): Run ECC check test.
(clean-check-ecc): Cleanup run of ECC check test.
* NEWS: Updated.
* fsg.sh: Don't remove SunEC.java and SunECEntries.java,
which are still needed by the PKCS11 provider in 8.
* patches/disable-intree-ec.patch:
Regenerated.
* patches/nss-config.patch: Likewise.
* patches/nss-not-enabled-config.patch: Likewise.
* test/standalone/TestCryptoLevel.java: ...here.
* test/standalone/TestEllipticCurveCryptoSupport.java:
Add check for elliptic curve cryptography support.
* test/standalone/agpl-3.0.txt:
Add back AGPL 3 license as this is used by TestCryptoLevel
and the new TestEllipticCurveCryptoSupport tests.
author | Andrew John Hughes <gnu_andrew@member.fsf.org> |
---|---|
date | Fri, 22 May 2015 05:55:33 +0100 |
parents | fe86c35d05b0 |
children | 85e4e1594c99 |
files | ChangeLog Makefile.am NEWS TestCryptoLevel.java fsg.sh patches/disable-intree-ec.patch patches/nss-config.patch patches/nss-not-enabled-config.patch test/standalone/TestCryptoLevel.java test/standalone/TestEllipticCurveCryptoSupport.java test/standalone/agpl-3.0.txt |
diffstat | 11 files changed, 1014 insertions(+), 99 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog Mon May 18 03:40:22 2015 +0100 +++ b/ChangeLog Fri May 22 05:55:33 2015 +0100 @@ -1,3 +1,36 @@ +2015-05-20 Andrew John Hughes <gnu_andrew@member.fsf.org> + + PR2369: SunEC provider is partially installed + * TestCryptoLevel.java: Moved to... + * Makefile.am: + (ECC_CHECK_BUILD_DIR): Added. + (CRYPTO_CHECK_SRCS): Update TestCryptoLevel.java + path. + (ECC_CHECK_SRCS): Added. + (ICEDTEA_PATCHES): Re-add updated disable-intree-ec.patch + (EXTRA_DIST): Add ECC_CHECK_SRCS. + (check-local): Add check-ecc.stamp. + (clean-tests): Add clean-check-ecc. + (clean-local): Add clean-ecccheck. + (.PHONY). ADd clean-ecccheck and clean-check-ecc. + (ecccheck): Build ECC check test. + (clean-ecccheck): Cleanup ECC check test. + (check-ecc): Run ECC check test. + (clean-check-ecc): Cleanup run of ECC check test. + * NEWS: Updated. + * fsg.sh: Don't remove SunEC.java and SunECEntries.java, + which are still needed by the PKCS11 provider in 8. + * patches/disable-intree-ec.patch: + Regenerated. + * patches/nss-config.patch: Likewise. + * patches/nss-not-enabled-config.patch: Likewise. + * test/standalone/TestCryptoLevel.java: ...here. + * test/standalone/TestEllipticCurveCryptoSupport.java: + Add check for elliptic curve cryptography support. + * test/standalone/agpl-3.0.txt: + Add back AGPL 3 license as this is used by TestCryptoLevel + and the new TestEllipticCurveCryptoSupport tests. + 2015-05-16 Andrew John Hughes <gnu_andrew@member.fsf.org> PR94: empty install target in Makefile.am
--- a/Makefile.am Mon May 18 03:40:22 2015 +0100 +++ b/Makefile.am Fri May 22 05:55:33 2015 +0100 @@ -69,6 +69,7 @@ STAGE2_BOOT_DIR = $(abs_top_builddir)/bootstrap/icedtea JAMVM_IMPORT_PATH = $(abs_top_builddir)/jamvm/install/hotspot CRYPTO_CHECK_BUILD_DIR = $(abs_top_builddir)/cryptocheck.build +ECC_CHECK_BUILD_DIR = $(abs_top_builddir)/ecccheck.build # Source directories @@ -214,14 +215,17 @@ # Sources list -CRYPTO_CHECK_SRCS = $(top_srcdir)/TestCryptoLevel.java +CRYPTO_CHECK_SRCS = $(top_srcdir)/test/standalone/TestCryptoLevel.java + +ECC_CHECK_SRCS = $(top_srcdir)/test/standalone/TestEllipticCurveCryptoSupport.java # Patch list ICEDTEA_PATCHES = \ patches/memory-limits.patch \ patches/override-redirect-metacity.patch \ - patches/rh1022017.patch + patches/rh1022017.patch \ + patches/disable-intree-ec.patch # Conditional patches @@ -560,16 +564,17 @@ scripts/jni_create_stap.c \ scripts/jni_desc \ THANKYOU test/tapset \ - $(CRYPTO_CHECK_SRCS) + $(CRYPTO_CHECK_SRCS) \ + $(ECC_CHECK_SRCS) # Top-Level Targets # ================= all-local: icedtea-stage2 -check-local: jtregcheck check-tapset +check-local: jtregcheck check-tapset stamps/check-ecc.stamp -clean-tests: clean-jtreg clean-tapset-report clean-jtreg-reports +clean-tests: clean-jtreg clean-tapset-report clean-jtreg-reports clean-check-ecc if [ $(abs_top_srcdir) != $(abs_top_builddir) ] ; then \ if [ -e test ] ; then \ rmdir test ; \ @@ -582,7 +587,7 @@ clean-bootstrap-directory-symlink-stage1 clean-bootstrap-directory-symlink-stage2 \ clean-extract clean-native-ecj clean-icedtea-stage2 \ clean-icedtea-debug-stage2 clean-icedtea-stage1 clean-add-zero clean-add-zero-debug \ - clean-add-cacao clean-add-cacao-debug clean-cryptocheck + clean-add-cacao clean-add-cacao-debug clean-cryptocheck clean-ecccheck if [ -e bootstrap ]; then \ rmdir bootstrap ; \ fi @@ -613,7 +618,7 @@ clean-download-nashorn clean-extract-nashorn clean-download-hotspot \ clean-check-crypto clean-check-crypto-debug clean-check-crypto-boot \ clean-add-archive clean-add-archive-debug clean-add-archive-boot clean-cryptocheck \ - clean-tests clean-tapset-report + clean-tests clean-tapset-report clean-ecccheck clean-check-ecc env: @echo 'unset JAVA_HOME' @@ -2280,6 +2285,29 @@ rm -rf $(CRYPTO_CHECK_BUILD_DIR) rm -f stamps/cryptocheck.stamp +# ECC Availability Check + +stamps/ecccheck.stamp: $(INITIAL_BOOTSTRAP_LINK_STAMP) + mkdir -p $(ECC_CHECK_BUILD_DIR) + $(BOOT_DIR)/bin/javac $(IT_JAVACFLAGS) \ + -d $(ECC_CHECK_BUILD_DIR) $(ECC_CHECK_SRCS) + mkdir -p stamps + touch $@ + +clean-ecccheck: + rm -rf $(ECC_CHECK_BUILD_DIR) + rm -f stamps/ecccheck.stamp + +stamps/check-ecc.stamp: stamps/ecccheck.stamp stamps/icedtea.stamp + if [ -e $(BUILD_SDK_DIR)/bin/java ] ; then \ + $(BUILD_SDK_DIR)/bin/java -cp $(ECC_CHECK_BUILD_DIR) TestEllipticCurveCryptoSupport no ; \ + fi + mkdir -p stamps + touch $@ + +clean-check-ecc: + rm -f stamps/check-ecc.stamp + # Installation Targets # ==================== @@ -2475,6 +2503,8 @@ check-crypto-debug: stamps/check-crypto-debug.stamp +check-ecc: stamps/check-ecc.stamp + clone-boot: stamps/clone-boot.stamp cryptocheck: stamps/cryptocheck.stamp @@ -2487,6 +2517,8 @@ download-openjdk: stamps/download-openjdk.stamp +ecccheck: stamps/ecccheck.stamp + extract: stamps/extract.stamp extract-cacao: stamps/extract-cacao.stamp
--- a/NEWS Mon May 18 03:40:22 2015 +0100 +++ b/NEWS Fri May 22 05:55:33 2015 +0100 @@ -70,6 +70,7 @@ - PR2329: jamvm parallel unpack failures - PR2348: Avoid following symlinks for CACAO and JamVM patches - PR2363: Remove EC source code prior to build + - PR2369: SunEC provider is partially installed - Don't substitute 'j' for '-j' inside -I directives - Extend 8041658 to all files in the HotSpot build. - Remove jcheck
--- a/TestCryptoLevel.java Mon May 18 03:40:22 2015 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,78 +0,0 @@ -/* TestCryptoLevel -- Ensure unlimited crypto policy is in use. - Copyright (C) 2012 Red Hat, Inc. - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU Affero General Public License as -published by the Free Software Foundation, either version 3 of the -License, or (at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU Affero General Public License for more details. - -You should have received a copy of the GNU Affero General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -import java.lang.reflect.Field; -import java.lang.reflect.Method; -import java.lang.reflect.InvocationTargetException; - -import java.security.Permission; -import java.security.PermissionCollection; - -public class TestCryptoLevel -{ - public static void main(String[] args) - throws NoSuchFieldException, ClassNotFoundException, - IllegalAccessException, InvocationTargetException - { - Class<?> cls = null; - Method def = null, exempt = null; - - try - { - cls = Class.forName("javax.crypto.JceSecurity"); - } - catch (ClassNotFoundException ex) - { - System.err.println("Running a non-Sun JDK."); - System.exit(0); - } - catch (ExceptionInInitializerError err) - { - System.err.println("Failed to initialise JceSecurity: " - + err.getCause().getCause().getMessage()); - System.exit(-2); - } - try - { - def = cls.getDeclaredMethod("getDefaultPolicy"); - exempt = cls.getDeclaredMethod("getExemptPolicy"); - } - catch (NoSuchMethodException ex) - { - System.err.println("Running IcedTea with the original crypto patch."); - System.exit(0); - } - def.setAccessible(true); - exempt.setAccessible(true); - PermissionCollection defPerms = (PermissionCollection) def.invoke(null); - PermissionCollection exemptPerms = (PermissionCollection) exempt.invoke(null); - Class<?> apCls = Class.forName("javax.crypto.CryptoAllPermission"); - Field apField = apCls.getDeclaredField("INSTANCE"); - apField.setAccessible(true); - Permission allPerms = (Permission) apField.get(null); - if (defPerms.implies(allPerms) && (exemptPerms == null || exemptPerms.implies(allPerms))) - { - System.err.println("Running with the unlimited policy."); - System.exit(0); - } - else - { - System.err.println("WARNING: Running with a restricted crypto policy."); - System.exit(-1); - } - } -}
--- a/fsg.sh Mon May 18 03:40:22 2015 +0100 +++ b/fsg.sh Fri May 22 05:55:33 2015 +0100 @@ -109,7 +109,5 @@ rm -vf openjdk/jdk/src/share/classes/sun/security/ec/ECDHKeyAgreement.java rm -vf openjdk/jdk/src/share/classes/sun/security/ec/ECDSASignature.java rm -vf openjdk/jdk/src/share/classes/sun/security/ec/ECKeyPairGenerator.java -rm -vf openjdk/jdk/src/share/classes/sun/security/ec/SunEC.java -rm -vf openjdk/jdk/src/share/classes/sun/security/ec/SunECEntries.java rm -rvf openjdk/jdk/src/share/native/sun/security/ec rm -rvf openjdk/jdk/make/sun/security/ec
--- a/patches/disable-intree-ec.patch Mon May 18 03:40:22 2015 +0100 +++ b/patches/disable-intree-ec.patch Fri May 22 05:55:33 2015 +0100 @@ -1,7 +1,7 @@ -diff -Nru openjdk.orig/jdk/src/share/lib/security/java.security openjdk/jdk/src/share/lib/security/java.security ---- openjdk.orig/jdk/src/share/lib/security/java.security-linux 2009-09-10 19:04:25.000000000 +0100 -+++ openjdk/jdk/src/share/lib/security/java.security-linux 2009-09-11 14:53:07.000000000 +0100 -@@ -45,13 +45,12 @@ +diff -Nru openjdk.orig/jdk/src/share/lib/security/java.security-linux openjdk/jdk/src/share/lib/security/java.security-linux +--- openjdk.orig/jdk/src/share/lib/security/java.security-linux 2015-02-10 16:24:28.000000000 +0000 ++++ openjdk/jdk/src/share/lib/security/java.security-linux 2015-05-20 06:53:32.666803554 +0100 +@@ -67,13 +67,12 @@ # security.provider.1=sun.security.provider.Sun security.provider.2=sun.security.rsa.SunRsaSign @@ -20,4 +20,4 @@ +security.provider.8=sun.security.smartcardio.SunPCSC # - # Select the source of seed data for SecureRandom. By default an + # Sun Provider SecureRandom seed source.
--- a/patches/nss-config.patch Mon May 18 03:40:22 2015 +0100 +++ b/patches/nss-config.patch Fri May 22 05:55:33 2015 +0100 @@ -2,10 +2,10 @@ --- openjdk.orig/jdk/src/share/lib/security/java.security-linux 2014-04-23 21:14:53.000000000 +0100 +++ openjdk/jdk/src/share/lib/security/java.security-linux 2014-05-12 21:03:02.156131725 +0100 @@ -74,6 +74,7 @@ - security.provider.7=com.sun.security.sasl.Provider - security.provider.8=org.jcp.xml.dsig.internal.dom.XMLDSigRI - security.provider.9=sun.security.smartcardio.SunPCSC -+security.provider.10=sun.security.pkcs11.SunPKCS11 ${java.home}/lib/security/nss.cfg + security.provider.6=com.sun.security.sasl.Provider + security.provider.7=org.jcp.xml.dsig.internal.dom.XMLDSigRI + security.provider.8=sun.security.smartcardio.SunPCSC ++security.provider.9=sun.security.pkcs11.SunPKCS11 ${java.home}/lib/security/nss.cfg # # Sun Provider SecureRandom seed source.
--- a/patches/nss-not-enabled-config.patch Mon May 18 03:40:22 2015 +0100 +++ b/patches/nss-not-enabled-config.patch Fri May 22 05:55:33 2015 +0100 @@ -1,9 +1,9 @@ --- openjdk.orig/jdk/src/share/lib/security/java.security-linux 2009-08-25 11:43:59.000000000 +0100 +++ openjdk/jdk/src/share/lib/security/java.security-linux 2009-08-27 14:23:54.000000000 +0100 @@ -51,6 +51,10 @@ - security.provider.7=com.sun.security.sasl.Provider - security.provider.8=org.jcp.xml.dsig.internal.dom.XMLDSigRI - security.provider.9=sun.security.smartcardio.SunPCSC + security.provider.6=com.sun.security.sasl.Provider + security.provider.7=org.jcp.xml.dsig.internal.dom.XMLDSigRI + security.provider.8=sun.security.smartcardio.SunPCSC +# the NSS security provider was not enabled for this build; it can be enabled +# if NSS (libnss3) is available on the machine. The nss.cfg file may need +# editing to reflect the location of the NSS installation.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/standalone/TestCryptoLevel.java Fri May 22 05:55:33 2015 +0100 @@ -0,0 +1,78 @@ +/* TestCryptoLevel -- Ensure unlimited crypto policy is in use. + Copyright (C) 2012 Red Hat, Inc. + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as +published by the Free Software Foundation, either version 3 of the +License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.lang.reflect.InvocationTargetException; + +import java.security.Permission; +import java.security.PermissionCollection; + +public class TestCryptoLevel +{ + public static void main(String[] args) + throws NoSuchFieldException, ClassNotFoundException, + IllegalAccessException, InvocationTargetException + { + Class<?> cls = null; + Method def = null, exempt = null; + + try + { + cls = Class.forName("javax.crypto.JceSecurity"); + } + catch (ClassNotFoundException ex) + { + System.err.println("Running a non-Sun JDK."); + System.exit(0); + } + catch (ExceptionInInitializerError err) + { + System.err.println("Failed to initialise JceSecurity: " + + err.getCause().getCause().getMessage()); + System.exit(-2); + } + try + { + def = cls.getDeclaredMethod("getDefaultPolicy"); + exempt = cls.getDeclaredMethod("getExemptPolicy"); + } + catch (NoSuchMethodException ex) + { + System.err.println("Running IcedTea with the original crypto patch."); + System.exit(0); + } + def.setAccessible(true); + exempt.setAccessible(true); + PermissionCollection defPerms = (PermissionCollection) def.invoke(null); + PermissionCollection exemptPerms = (PermissionCollection) exempt.invoke(null); + Class<?> apCls = Class.forName("javax.crypto.CryptoAllPermission"); + Field apField = apCls.getDeclaredField("INSTANCE"); + apField.setAccessible(true); + Permission allPerms = (Permission) apField.get(null); + if (defPerms.implies(allPerms) && (exemptPerms == null || exemptPerms.implies(allPerms))) + { + System.err.println("Running with the unlimited policy."); + System.exit(0); + } + else + { + System.err.println("WARNING: Running with a restricted crypto policy."); + System.exit(-1); + } + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/standalone/TestEllipticCurveCryptoSupport.java Fri May 22 05:55:33 2015 +0100 @@ -0,0 +1,190 @@ +/* TestEllipticCurveCryptoSupport -- Check if ECC is available. + Copyright (C) 2015 Red Hat, Inc. + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as +published by the Free Software Foundation, either version 3 of the +License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +import java.lang.reflect.Field; + +import java.security.AlgorithmParameters; +import java.security.KeyFactory; +import java.security.KeyPairGenerator; +import java.security.NoSuchAlgorithmException; +import java.security.Provider; +import java.security.Security; +import java.security.Signature; + +import javax.crypto.KeyAgreement; + +/** + * Check whether Elliptic Curve Crypto is available. + * + * Based on http://docs.oracle.com/javase/7/docs/technotes/guides/security/SunProviders.html#SunEC + */ +public class TestEllipticCurveCryptoSupport { + + private static final String PKCS11_NAME = "SunPKCS11-NSS"; + private static final String EC_NAME = "SunEC"; + + public static void main(String[] args) throws Exception { + boolean possibleProblems = false; + boolean available = false; + boolean pkcs11 = false; + + if (args.length < 1) { + System.err.println("TestEllipticCurveCryptoSupport <available=yes|no>"); + System.exit(-1); + } + + System.err.print("ECC should be available: "); + if ("yes".equals(args[0])) { + available = true; + System.err.println(args[0]); + } else { + available = false; + System.err.println("no"); + } + + // Provider + Provider provider = Security.getProvider(EC_NAME); + if (provider == null) { + System.out.println("No SunEC provider"); + } else { + System.out.println("SunEC provider is present"); + possibleProblems = true; + } + + provider = Security.getProvider(PKCS11_NAME); + if (provider != null) + { + pkcs11 = true; + System.err.println("PKCS11 provider is present; adjusting tests accordingly."); + } + else + System.err.println("PKCS11 provider is present."); + + // AlgorithmParameters + try { + AlgorithmParameters params = AlgorithmParameters.getInstance("EC"); + System.out.print("EC AlgorithmParameter is present; "); + if (params.getProvider().getName().equals(PKCS11_NAME)) + { + System.out.println("provided by PKCS11"); + } + else + { + System.out.println("provided by EC provider"); + possibleProblems = true; + } + } catch (NoSuchAlgorithmException e) { + System.out.println("No EC AlgorithmParameters"); + } + + // KeyAgreement + try { + KeyAgreement agreement = KeyAgreement.getInstance("ECDH"); + System.out.print("ECDH KeyAgreement is present; "); + if (agreement.getProvider().getName().equals(PKCS11_NAME)) + { + System.out.println("provided by PKCS11"); + } + else + { + System.out.println("provided by EC provider"); + possibleProblems = true; + } + } catch (NoSuchAlgorithmException e) { + System.out.println("No ECDH KeyAgreement"); + } + + // KeyFactory + try { + KeyFactory factory = KeyFactory.getInstance("EC"); + System.out.print("EC KeyFactory is present; "); + if (factory.getProvider().getName().equals(PKCS11_NAME)) + { + System.out.println("provided by PKCS11"); + } + else + { + System.out.println("provided by EC provider"); + possibleProblems = true; + } + } catch (NoSuchAlgorithmException e) { + System.out.println("No EC KeyFactory"); + } + + // KeyPairGenerator + try { + KeyPairGenerator gen = KeyPairGenerator.getInstance("EC"); + System.out.print("EC KeyPairGenerator is present; "); + if (gen.getProvider().getName().equals(PKCS11_NAME)) + { + System.out.println("provided by PKCS11"); + } + else + { + System.out.println("provided by EC provider"); + possibleProblems = true; + } + } catch (NoSuchAlgorithmException e) { + System.out.println("No EC KeyFactory"); + } + + // Signature + try { + Signature sig = Signature.getInstance("NONEwithECDSA"); + System.out.print("EC Signatures are present; "); + if (sig.getProvider().getName().equals(PKCS11_NAME)) + { + System.out.println("provided by PKCS11"); + } + else + { + System.out.println("provided by EC provider"); + possibleProblems = true; + } + } catch (NoSuchAlgorithmException e) { + System.out.println("OK: No EC Signatures are present"); + } + + // Full implementation + try + { + Class<?> sunECProvider = Class.forName("sun.security.ec.SunEC"); + System.err.println("sunECProvider class: " + sunECProvider); + Field f = sunECProvider.getDeclaredField("useFullImplementation"); + f.setAccessible(true); + boolean implemented = f.getBoolean(null); + System.err.println("useFullImplementation = " + implemented); + possibleProblems = implemented; + } + catch (ClassNotFoundException e) { + System.out.println("SunEC provider class not found."); + } + catch (NoSuchFieldException e) { + System.out.println("useFullImplementation field not found in SunEC"); + } + catch (IllegalAccessException e) { + System.out.println("Could not access useFullImplementation field"); + } + + System.err.println("SunEC provider available: " + possibleProblems); + if (available) + System.exit(possibleProblems ? 0 : 1); + else + System.exit(possibleProblems ? 1 : 0); + + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/standalone/agpl-3.0.txt Fri May 22 05:55:33 2015 +0100 @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. 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