diff --git a/composer.json b/composer.json
index 4b84b110..6a35cb7a 100644
--- a/composer.json
+++ b/composer.json
@@ -55,7 +55,7 @@
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         "squizlabs/php_codesniffer": "~2.0"
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diff --git a/composer.lock b/composer.lock
index beda2d64..78a3e8e6 100644
--- a/composer.lock
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@@ -64,16 +64,16 @@
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@@ -111,7 +111,52 @@
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-            "time": "2015-12-24 01:37:31"
+            "time": "2016-10-29 18:58:20"
+        },
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+            "version": "1.7.0",
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+                "url": "https://github.com/myclabs/DeepCopy.git",
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+                "phpunit/phpunit": "^4.1"
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+            "autoload": {
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+                    "DeepCopy\\": "src/DeepCopy/"
+                },
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Create deep copies (clones) of your objects",
+            "keywords": [
+                "clone",
+                "copy",
+                "duplicate",
+                "object",
+                "object graph"
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@@ -159,17 +204,119 @@
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+                "ext-phar": "*",
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+            "license": [
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+                    "role": "Developer"
+                },
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+                    "email": "sebastian@phpeople.de",
+                    "role": "Developer"
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+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "Developer"
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+            ],
+            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
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+        },
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+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
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+                    "email": "sebastian@phpeople.de",
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+                    "email": "sebastian@phpunit.de",
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@@ -192,6 +339,7 @@
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@@ -206,6 +354,7 @@
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                 "sebastian/phpcpd": "Copy/Paste Detector (CPD) for PHP code",
+                "siad007/versioncontrol_hg": "A library for interfacing with Mercurial repositories.",
                 "tedivm/jshrink": "Javascript Minifier built in PHP"
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@@ -214,7 +363,7 @@
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@@ -247,20 +396,20 @@
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@@ -301,33 +450,39 @@
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@@ -346,24 +501,24 @@
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@@ -393,36 +548,37 @@
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@@ -455,43 +611,45 @@
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@@ -517,20 +675,20 @@
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@@ -564,7 +722,7 @@
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@@ -609,25 +767,30 @@
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@@ -649,33 +812,33 @@
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+            },
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+                "shasum": ""
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+            "extra": {
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+            },
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+                "classmap": [
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29 09:07:27"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "shasum": ""
+            },
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+            "require-dev": {
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+            },
+            "type": "library",
+            "extra": {
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+                    "dev-master": "3.0.x-dev"
                 }
             },
             "autoload": {
@@ -1266,23 +1628,73 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2015-11-11 19:50:13"
+            "time": "2017-03-03 06:23:57"
         },
         {
-            "name": "sebastian/version",
-            "version": "1.0.6",
+            "name": "sebastian/resource-operations",
+            "version": "1.0.0",
             "source": {
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-                "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6"
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
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-                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
+                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
                 "shasum": ""
             },
+            "require": {
+                "php": ">=5.6.0"
+            },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2015-07-28 20:34:47"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
             "autoload": {
                 "classmap": [
                     "src/"
@@ -1301,20 +1713,20 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21 13:59:46"
+            "time": "2016-10-03 07:35:21"
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "2.6.1",
+            "version": "2.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "fb72ed32f8418db5e7770be1653e62e0d6f5dd3d"
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62"
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-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/fb72ed32f8418db5e7770be1653e62e0d6f5dd3d",
-                "reference": "fb72ed32f8418db5e7770be1653e62e0d6f5dd3d",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/dcbed1074f8244661eecddfc2a675430d8d33f62",
+                "reference": "dcbed1074f8244661eecddfc2a675430d8d33f62",
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             },
             "require": {
@@ -1379,24 +1791,25 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2016-05-30 22:24:32"
+            "time": "2017-05-22 02:43:20"
         },
         {
             "name": "symfony/console",
-            "version": "v2.8.7",
+            "version": "v2.8.31",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "5ac8bc9aa77bb2edf06af3a1bb6bc1020d23acd3"
+                "reference": "7cad097cf081c0ab3d0322cc38d34ee80484d86f"
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-                "url": "https://api.github.com/repos/symfony/console/zipball/5ac8bc9aa77bb2edf06af3a1bb6bc1020d23acd3",
-                "reference": "5ac8bc9aa77bb2edf06af3a1bb6bc1020d23acd3",
+                "url": "https://api.github.com/repos/symfony/console/zipball/7cad097cf081c0ab3d0322cc38d34ee80484d86f",
+                "reference": "7cad097cf081c0ab3d0322cc38d34ee80484d86f",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.9",
+                "symfony/debug": "^2.7.2|~3.0.0",
                 "symfony/polyfill-mbstring": "~1.0"
             },
             "require-dev": {
@@ -1439,20 +1852,77 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2016-06-06 15:06:25"
+            "time": "2017-11-16 15:20:19"
         },
         {
-            "name": "symfony/filesystem",
-            "version": "v2.8.7",
+            "name": "symfony/debug",
+            "version": "v3.0.9",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/filesystem.git",
-                "reference": "dee379131dceed90a429e951546b33edfe7dccbb"
+                "url": "https://github.com/symfony/debug.git",
+                "reference": "697c527acd9ea1b2d3efac34d9806bf255278b0a"
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-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/dee379131dceed90a429e951546b33edfe7dccbb",
-                "reference": "dee379131dceed90a429e951546b33edfe7dccbb",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/697c527acd9ea1b2d3efac34d9806bf255278b0a",
+                "reference": "697c527acd9ea1b2d3efac34d9806bf255278b0a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9",
+                "psr/log": "~1.0"
+            },
+            "conflict": {
+                "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
+            },
+            "require-dev": {
+                "symfony/class-loader": "~2.8|~3.0",
+                "symfony/http-kernel": "~2.8|~3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Debug\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Debug Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-07-30 07:22:48"
+        },
+        {
+            "name": "symfony/filesystem",
+            "version": "v2.8.31",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/filesystem.git",
+                "reference": "10507c5f24577b0ad971b0d22097c823b2b45dd3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/10507c5f24577b0ad971b0d22097c823b2b45dd3",
+                "reference": "10507c5f24577b0ad971b0d22097c823b2b45dd3",
                 "shasum": ""
             },
             "require": {
@@ -1488,20 +1958,20 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2016-04-12 18:01:21"
+            "time": "2017-11-07 14:08:47"
         },
         {
             "name": "symfony/finder",
-            "version": "v2.8.7",
+            "version": "v2.8.31",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "3ec095fab1800222732ca522a95dce8fa124007b"
+                "reference": "efeceae6a05a9b2fcb3391333f1d4a828ff44ab8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/3ec095fab1800222732ca522a95dce8fa124007b",
-                "reference": "3ec095fab1800222732ca522a95dce8fa124007b",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/efeceae6a05a9b2fcb3391333f1d4a828ff44ab8",
+                "reference": "efeceae6a05a9b2fcb3391333f1d4a828ff44ab8",
                 "shasum": ""
             },
             "require": {
@@ -1537,20 +2007,20 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2016-06-06 11:11:27"
+            "time": "2017-11-05 15:25:56"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.2.0",
+            "version": "v1.6.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "dff51f72b0706335131b00a7f49606168c582594"
+                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/dff51f72b0706335131b00a7f49606168c582594",
-                "reference": "dff51f72b0706335131b00a7f49606168c582594",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
+                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
                 "shasum": ""
             },
             "require": {
@@ -1562,7 +2032,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.6-dev"
                 }
             },
             "autoload": {
@@ -1596,20 +2066,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2017-10-11 12:05:26"
         },
         {
             "name": "symfony/process",
-            "version": "v2.8.7",
+            "version": "v2.8.31",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "115347d00c342198cdc52a7bd8bc15b5ab43500c"
+                "reference": "d25449e031f600807949aab7cadbf267712f4eee"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/115347d00c342198cdc52a7bd8bc15b5ab43500c",
-                "reference": "115347d00c342198cdc52a7bd8bc15b5ab43500c",
+                "url": "https://api.github.com/repos/symfony/process/zipball/d25449e031f600807949aab7cadbf267712f4eee",
+                "reference": "d25449e031f600807949aab7cadbf267712f4eee",
                 "shasum": ""
             },
             "require": {
@@ -1645,20 +2115,20 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2016-06-06 11:11:27"
+            "time": "2017-11-05 15:25:56"
         },
         {
             "name": "symfony/yaml",
-            "version": "v2.8.7",
+            "version": "v2.8.31",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "815fabf3f48c7d1df345a69d1ad1a88f59757b34"
+                "reference": "d819bf267e901727141fe828ae888486fd21236e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/815fabf3f48c7d1df345a69d1ad1a88f59757b34",
-                "reference": "815fabf3f48c7d1df345a69d1ad1a88f59757b34",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/d819bf267e901727141fe828ae888486fd21236e",
+                "reference": "d819bf267e901727141fe828ae888486fd21236e",
                 "shasum": ""
             },
             "require": {
@@ -1694,38 +2164,82 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2016-06-06 11:11:27"
+            "time": "2017-11-05 15:25:56"
         },
         {
-            "name": "twig/twig",
-            "version": "v1.24.1",
+            "name": "theseer/tokenizer",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/twigphp/Twig.git",
-                "reference": "3566d311a92aae4deec6e48682dc5a4528c4a512"
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/3566d311a92aae4deec6e48682dc5a4528c4a512",
-                "reference": "3566d311a92aae4deec6e48682dc5a4528c4a512",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/cb2f008f3f05af2893a87208fe6a6c4985483f8b",
+                "reference": "cb2f008f3f05af2893a87208fe6a6c4985483f8b",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.2.7"
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2017-04-07 12:08:54"
+        },
+        {
+            "name": "twig/twig",
+            "version": "v1.35.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/twigphp/Twig.git",
+                "reference": "daa657073e55b0a78cce8fdd22682fddecc6385f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/daa657073e55b0a78cce8fdd22682fddecc6385f",
+                "reference": "daa657073e55b0a78cce8fdd22682fddecc6385f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
             },
             "require-dev": {
+                "psr/container": "^1.0",
                 "symfony/debug": "~2.7",
-                "symfony/phpunit-bridge": "~2.7"
+                "symfony/phpunit-bridge": "~3.3@dev"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.24-dev"
+                    "dev-master": "1.35-dev"
                 }
             },
             "autoload": {
                 "psr-0": {
                     "Twig_": "lib/"
+                },
+                "psr-4": {
+                    "Twig\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1755,32 +2269,33 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2016-05-30 09:11:59"
+            "time": "2017-09-27 18:06:46"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.0.2",
+            "version": "1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde"
+                "reference": "2db61e59ff05fe5126d152bd0655c9ea113e550f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde",
-                "reference": "30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/2db61e59ff05fe5126d152bd0655c9ea113e550f",
+                "reference": "2db61e59ff05fe5126d152bd0655c9ea113e550f",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^5.3.3 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.6"
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0-dev"
+                    "dev-master": "1.3-dev"
                 }
             },
             "autoload": {
@@ -1804,7 +2319,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2015-08-24 13:29:44"
+            "time": "2016-11-23 20:04:58"
         }
     ],
     "aliases": [],
diff --git a/phpseclib/Crypt/Random.php b/phpseclib/Crypt/Random.php
index 6b29e751..01e34cc3 100644
--- a/phpseclib/Crypt/Random.php
+++ b/phpseclib/Crypt/Random.php
@@ -45,6 +45,10 @@ class Random
      */
     static function string($length)
     {
+        if (!$length) {
+            return '';
+        }
+
         if (version_compare(PHP_VERSION, '7.0.0', '>=')) {
             try {
                 return \random_bytes($length);
diff --git a/phpseclib/File/X509.php b/phpseclib/File/X509.php
index c1d591ad..7d42fe65 100644
--- a/phpseclib/File/X509.php
+++ b/phpseclib/File/X509.php
@@ -2719,7 +2719,9 @@ class X509
                     $value = array_pop($value); // Always strip data type.
                 }
             } elseif (is_object($value) && $value instanceof Element) {
-                $callback = create_function('$x', 'return "\x" . bin2hex($x[0]);');
+                $callback = function ($x) {
+                    return "\x" . bin2hex($x[0]);
+                };
                 $value = strtoupper(preg_replace_callback('#[^\x20-\x7E]#', $callback, $value->element));
             }
             $output.= $desc . '=' . $value;
diff --git a/tests/PHPUnit_Framework_TestCase.php b/tests/PHPUnit_Framework_TestCase.php
new file mode 100644
index 00000000..3e8ba255
--- /dev/null
+++ b/tests/PHPUnit_Framework_TestCase.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * @author    Jim Wigginton <terrafrost@php.net>
+ * @copyright 2017 Jim Wigginton
+ * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
+ */
+
+use PHPUnit\Framework\TestCase;
+
+abstract class PHPUnit_Framework_TestCase extends PHPUnit\Framework\TestCase
+{
+    public function getMock($className, $methodName)
+    {
+        return $this->getMockBuilder($className)->setMethods($methodName)->getMock();
+    }
+}
diff --git a/tests/PhpseclibTestCase.php b/tests/PhpseclibTestCase.php
index 1a2a8e4a..5d486e82 100644
--- a/tests/PhpseclibTestCase.php
+++ b/tests/PhpseclibTestCase.php
@@ -5,6 +5,8 @@
  * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
  */
 
+include(__DIR__ . '/PHPUnit_Framework_TestCase.php');
+
 abstract class PhpseclibTestCase extends PHPUnit_Framework_TestCase
 {
     protected $tempFilesToUnlinkOnTearDown = array();
diff --git a/travis/composer.legacy.json b/travis/composer.legacy.json
new file mode 100644
index 00000000..4b84b110
--- /dev/null
+++ b/travis/composer.legacy.json
@@ -0,0 +1,76 @@
+{
+    "name": "phpseclib/phpseclib",
+    "type": "library",
+    "description": "PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc.",
+    "keywords": [
+        "security",
+        "crypto",
+        "cryptography",
+        "encryption",
+        "signature",
+        "signing",
+        "rsa",
+        "aes",
+        "blowfish",
+        "twofish",
+        "ssh",
+        "sftp",
+        "x509",
+        "x.509",
+        "asn1",
+        "asn.1",
+        "BigInteger"
+        ],
+    "homepage": "http://phpseclib.sourceforge.net",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Jim Wigginton",
+            "email": "terrafrost@php.net",
+            "role": "Lead Developer"
+        },
+        {
+            "name": "Patrick Monnerat",
+            "email": "pm@datasphere.ch",
+            "role": "Developer"
+        },
+        {
+            "name": "Andreas Fischer",
+            "email": "bantu@phpbb.com",
+            "role": "Developer"
+        },
+        {
+            "name": "Hans-Jürgen Petrich",
+            "email": "petrich@tronic-media.com",
+            "role": "Developer"
+        },
+        {
+            "name": "Graham Campbell",
+            "email": "graham@alt-three.com",
+            "role": "Developer"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.3"
+    },
+    "require-dev": {
+        "phing/phing": "~2.7",
+        "phpunit/phpunit": "~4.0",
+        "sami/sami": "~2.0",
+        "squizlabs/php_codesniffer": "~2.0"
+    },
+    "suggest": {
+        "ext-libsodium": "SSH2/SFTP can make use of some algorithms provided by the libsodium-php extension.",
+        "ext-openssl": "Install the OpenSSL extension in order to speed up a wide variety of cryptographic operations.",
+        "ext-mcrypt": "Install the Mcrypt extension in order to speed up a few other cryptographic operations.",
+        "ext-gmp": "Install the GMP (GNU Multiple Precision) extension in order to speed up arbitrary precision integer arithmetic operations."
+    },
+    "autoload": {
+        "files": [
+            "phpseclib/bootstrap.php"
+        ],
+        "psr-4": {
+            "phpseclib\\": "phpseclib/"
+        }
+    }
+}
diff --git a/travis/composer.legacy.lock b/travis/composer.legacy.lock
new file mode 100644
index 00000000..beda2d64
--- /dev/null
+++ b/travis/composer.legacy.lock
@@ -0,0 +1,1819 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "This file is @generated automatically"
+    ],
+    "hash": "8599992bf6058a9da82372eb8bcae2c2",
+    "content-hash": "fde47c84178c55c06de858a2128e3d07",
+    "packages": [],
+    "packages-dev": [
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3,<8.0-DEV"
+            },
+            "require-dev": {
+                "athletic/athletic": "~0.1.8",
+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "~2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://github.com/doctrine/instantiator",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2015-06-14 21:17:01"
+        },
+        {
+            "name": "michelf/php-markdown",
+            "version": "1.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/michelf/php-markdown.git",
+                "reference": "156e56ee036505ec637d761ee62dc425d807183c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/michelf/php-markdown/zipball/156e56ee036505ec637d761ee62dc425d807183c",
+                "reference": "156e56ee036505ec637d761ee62dc425d807183c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-lib": "1.4.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Michelf": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Michel Fortin",
+                    "email": "michel.fortin@michelf.ca",
+                    "homepage": "https://michelf.ca/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "John Gruber",
+                    "homepage": "https://daringfireball.net/"
+                }
+            ],
+            "description": "PHP Markdown",
+            "homepage": "https://michelf.ca/projects/php-markdown/",
+            "keywords": [
+                "markdown"
+            ],
+            "time": "2015-12-24 01:37:31"
+        },
+        {
+            "name": "nikic/php-parser",
+            "version": "v0.9.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/nikic/PHP-Parser.git",
+                "reference": "ef70767475434bdb3615b43c327e2cae17ef12eb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/ef70767475434bdb3615b43c327e2cae17ef12eb",
+                "reference": "ef70767475434bdb3615b43c327e2cae17ef12eb",
+                "shasum": ""
+            },
+            "require": {
+                "ext-tokenizer": "*",
+                "php": ">=5.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "PHPParser": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Nikita Popov"
+                }
+            ],
+            "description": "A PHP parser written in PHP",
+            "keywords": [
+                "parser",
+                "php"
+            ],
+            "time": "2014-07-23 18:24:17"
+        },
+        {
+            "name": "phing/phing",
+            "version": "2.14.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phingofficial/phing.git",
+                "reference": "7dd73c83c377623def54b58121f46b4dcb35dd61"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phingofficial/phing/zipball/7dd73c83c377623def54b58121f46b4dcb35dd61",
+                "reference": "7dd73c83c377623def54b58121f46b4dcb35dd61",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.2.0"
+            },
+            "require-dev": {
+                "ext-pdo_sqlite": "*",
+                "lastcraft/simpletest": "@dev",
+                "mikey179/vfsstream": "^1.6",
+                "pdepend/pdepend": "2.x",
+                "pear/archive_tar": "1.4.x",
+                "pear/http_request2": "dev-trunk",
+                "pear/net_growl": "dev-trunk",
+                "pear/pear-core-minimal": "1.10.1",
+                "pear/versioncontrol_git": "@dev",
+                "pear/versioncontrol_svn": "~0.5",
+                "phpdocumentor/phpdocumentor": "2.x",
+                "phploc/phploc": "~2.0.6",
+                "phpmd/phpmd": "~2.2",
+                "phpunit/phpunit": ">=3.7",
+                "sebastian/git": "~1.0",
+                "sebastian/phpcpd": "2.x",
+                "squizlabs/php_codesniffer": "~2.2",
+                "symfony/yaml": "~2.7"
+            },
+            "suggest": {
+                "pdepend/pdepend": "PHP version of JDepend",
+                "pear/archive_tar": "Tar file management class",
+                "pear/versioncontrol_git": "A library that provides OO interface to handle Git repository",
+                "pear/versioncontrol_svn": "A simple OO-style interface for Subversion, the free/open-source version control system",
+                "phpdocumentor/phpdocumentor": "Documentation Generator for PHP",
+                "phploc/phploc": "A tool for quickly measuring the size of a PHP project",
+                "phpmd/phpmd": "PHP version of PMD tool",
+                "phpunit/php-code-coverage": "Library that provides collection, processing, and rendering functionality for PHP code coverage information",
+                "phpunit/phpunit": "The PHP Unit Testing Framework",
+                "sebastian/phpcpd": "Copy/Paste Detector (CPD) for PHP code",
+                "tedivm/jshrink": "Javascript Minifier built in PHP"
+            },
+            "bin": [
+                "bin/phing"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.14.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "classes/phing/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "include-path": [
+                "classes"
+            ],
+            "license": [
+                "LGPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Michiel Rook",
+                    "email": "mrook@php.net"
+                },
+                {
+                    "name": "Phing Community",
+                    "homepage": "https://www.phing.info/trac/wiki/Development/Contributors"
+                }
+            ],
+            "description": "PHing Is Not GNU make; it's a PHP project build system or build tool based on Apache Ant.",
+            "homepage": "https://www.phing.info/",
+            "keywords": [
+                "build",
+                "phing",
+                "task",
+                "tool"
+            ],
+            "time": "2016-03-10 21:39:23"
+        },
+        {
+            "name": "phpdocumentor/reflection-common",
+            "version": "1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
+                "reference": "144c307535e82c8fdcaacbcfc1d6d8eeb896687c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/144c307535e82c8fdcaacbcfc1d6d8eeb896687c",
+                "reference": "144c307535e82c8fdcaacbcfc1d6d8eeb896687c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
+            ],
+            "time": "2015-12-27 11:43:31"
+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
+                "reference": "9270140b940ff02e58ec577c237274e92cd40cdd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/9270140b940ff02e58ec577c237274e92cd40cdd",
+                "reference": "9270140b940ff02e58ec577c237274e92cd40cdd",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5",
+                "phpdocumentor/reflection-common": "^1.0@dev",
+                "phpdocumentor/type-resolver": "^0.2.0",
+                "webmozart/assert": "^1.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^0.9.4",
+                "phpunit/phpunit": "^4.4"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
+            "time": "2016-06-10 09:48:41"
+        },
+        {
+            "name": "phpdocumentor/type-resolver",
+            "version": "0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
+                "reference": "b39c7a5b194f9ed7bd0dd345c751007a41862443"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/b39c7a5b194f9ed7bd0dd345c751007a41862443",
+                "reference": "b39c7a5b194f9ed7bd0dd345c751007a41862443",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5",
+                "phpdocumentor/reflection-common": "^1.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^0.9.4",
+                "phpunit/phpunit": "^5.2||^4.8.24"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
+                }
+            ],
+            "time": "2016-06-10 07:14:17"
+        },
+        {
+            "name": "phpspec/prophecy",
+            "version": "v1.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpspec/prophecy.git",
+                "reference": "58a8137754bc24b25740d4281399a4a3596058e0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/58a8137754bc24b25740d4281399a4a3596058e0",
+                "reference": "58a8137754bc24b25740d4281399a4a3596058e0",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/instantiator": "^1.0.2",
+                "php": "^5.3|^7.0",
+                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2",
+                "sebastian/comparator": "^1.1",
+                "sebastian/recursion-context": "^1.0"
+            },
+            "require-dev": {
+                "phpspec/phpspec": "^2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.6.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Prophecy\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Konstantin Kudryashov",
+                    "email": "ever.zet@gmail.com",
+                    "homepage": "http://everzet.com"
+                },
+                {
+                    "name": "Marcello Duarte",
+                    "email": "marcello.duarte@gmail.com"
+                }
+            ],
+            "description": "Highly opinionated mocking framework for PHP 5.3+",
+            "homepage": "https://github.com/phpspec/prophecy",
+            "keywords": [
+                "Double",
+                "Dummy",
+                "fake",
+                "mock",
+                "spy",
+                "stub"
+            ],
+            "time": "2016-06-07 08:13:47"
+        },
+        {
+            "name": "phpunit/php-code-coverage",
+            "version": "2.2.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
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+            },
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+                "phpunit/phpunit": "~4"
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+            "suggest": {
+                "ext-dom": "*",
+                "ext-xdebug": ">=2.2.1",
+                "ext-xmlwriter": "*"
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+            "type": "library",
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+                "branch-alias": {
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+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sb@sebastian-bergmann.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that provides collection, processing, and rendering functionality for PHP code coverage information.",
+            "homepage": "https://github.com/sebastianbergmann/php-code-coverage",
+            "keywords": [
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+            "notification-url": "https://packagist.org/downloads/",
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+                    "email": "whatthejeff@gmail.com"
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+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
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+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
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+        {
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+            "license": [
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+            "time": "2015-06-21 13:59:46"
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+        {
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+                    "CodeSniffer/File.php",
+                    "CodeSniffer/Fixer.php",
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+                    "CodeSniffer/Sniff.php",
+                    "CodeSniffer/Tokens.php",
+                    "CodeSniffer/Reports/",
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+                    "CodeSniffer/Standards/Squiz/Sniffs/",
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            ],
+            "description": "PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.",
+            "homepage": "http://www.squizlabs.com/php-codesniffer",
+            "keywords": [
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+            "time": "2016-05-30 22:24:32"
+        },
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+                "url": "https://github.com/symfony/console.git",
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+            "require-dev": {
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+                "symfony/event-dispatcher": "~2.1|~3.0.0",
+                "symfony/process": "~2.1|~3.0.0"
+            },
+            "suggest": {
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+                "symfony/event-dispatcher": "",
+                "symfony/process": ""
+            },
+            "type": "library",
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+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Console\\": ""
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+                "exclude-from-classmap": [
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Console Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-06-06 15:06:25"
+        },
+        {
+            "name": "symfony/filesystem",
+            "version": "v2.8.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/filesystem.git",
+                "reference": "dee379131dceed90a429e951546b33edfe7dccbb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/dee379131dceed90a429e951546b33edfe7dccbb",
+                "reference": "dee379131dceed90a429e951546b33edfe7dccbb",
+                "shasum": ""
+            },
+            "require": {
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+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.8-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Filesystem\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Filesystem Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-04-12 18:01:21"
+        },
+        {
+            "name": "symfony/finder",
+            "version": "v2.8.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/finder.git",
+                "reference": "3ec095fab1800222732ca522a95dce8fa124007b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/3ec095fab1800222732ca522a95dce8fa124007b",
+                "reference": "3ec095fab1800222732ca522a95dce8fa124007b",
+                "shasum": ""
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+                "php": ">=5.3.9"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
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+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Finder\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
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+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Finder Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-06-06 11:11:27"
+        },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "dff51f72b0706335131b00a7f49606168c582594"
+            },
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2016-05-18 14:26:46"
+        },
+        {
+            "name": "symfony/process",
+            "version": "v2.8.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/process.git",
+                "reference": "115347d00c342198cdc52a7bd8bc15b5ab43500c"
+            },
+            "dist": {
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+                "url": "https://api.github.com/repos/symfony/process/zipball/115347d00c342198cdc52a7bd8bc15b5ab43500c",
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+                "shasum": ""
+            },
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+            },
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+                }
+            },
+            "autoload": {
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+                    "Symfony\\Component\\Process\\": ""
+                },
+                "exclude-from-classmap": [
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
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+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Process Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-06-06 11:11:27"
+        },
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+            "name": "symfony/yaml",
+            "version": "v2.8.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/yaml.git",
+                "reference": "815fabf3f48c7d1df345a69d1ad1a88f59757b34"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/815fabf3f48c7d1df345a69d1ad1a88f59757b34",
+                "reference": "815fabf3f48c7d1df345a69d1ad1a88f59757b34",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.8-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Yaml\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Yaml Component",
+            "homepage": "https://symfony.com",
+            "time": "2016-06-06 11:11:27"
+        },
+        {
+            "name": "twig/twig",
+            "version": "v1.24.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/twigphp/Twig.git",
+                "reference": "3566d311a92aae4deec6e48682dc5a4528c4a512"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/3566d311a92aae4deec6e48682dc5a4528c4a512",
+                "reference": "3566d311a92aae4deec6e48682dc5a4528c4a512",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.2.7"
+            },
+            "require-dev": {
+                "symfony/debug": "~2.7",
+                "symfony/phpunit-bridge": "~2.7"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.24-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Twig_": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com",
+                    "homepage": "http://fabien.potencier.org",
+                    "role": "Lead Developer"
+                },
+                {
+                    "name": "Armin Ronacher",
+                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder"
+                },
+                {
+                    "name": "Twig Team",
+                    "homepage": "http://twig.sensiolabs.org/contributors",
+                    "role": "Contributors"
+                }
+            ],
+            "description": "Twig, the flexible, fast, and secure template language for PHP",
+            "homepage": "http://twig.sensiolabs.org",
+            "keywords": [
+                "templating"
+            ],
+            "time": "2016-05-30 09:11:59"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde",
+                "reference": "30eed06dd6bc88410a4ff7f77b6d22f3ce13dbde",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2015-08-24 13:29:44"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=5.3.3"
+    },
+    "platform-dev": []
+}
diff --git a/travis/setup-composer.sh b/travis/setup-composer.sh
index 3416074c..cd1288b7 100755
--- a/travis/setup-composer.sh
+++ b/travis/setup-composer.sh
@@ -1,3 +1,9 @@
 #!/bin/sh
+if [ `php -r "echo (int) version_compare(PHP_VERSION, '7.0', '<');"` = "1" ]
+then
+cp travis/composer.legacy.json composer.json
+cp travis/composer.legacy.lock composer.lock
+sed -i "s/include(__DIR__ . '\/PHPUnit_Framework_TestCase.php');//g" tests/PhpseclibTestCase.php
+fi
 composer self-update --no-interaction
 composer install --no-interaction