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diff --git a/node_modules/http-signature/.dir-locals.el b/node_modules/http-signature/.dir-locals.el
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@@ -0,0 +1,6 @@
+((nil . ((indent-tabs-mode . nil)
+         (tab-width . 8)
+         (fill-column . 80)))
+ (js-mode . ((js-indent-level . 2)
+             (indent-tabs-mode . nil)
+             )))
\ No newline at end of file
diff --git a/node_modules/http-signature/.npmignore b/node_modules/http-signature/.npmignore
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+.gitmodules
+deps
+docs
+Makefile
+node_modules
+test
+tools
\ No newline at end of file
diff --git a/node_modules/http-signature/CHANGES.md b/node_modules/http-signature/CHANGES.md
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@@ -0,0 +1,46 @@
+# node-http-signature changelog
+
+## 1.1.1
+
+- Version of dependency `assert-plus` updated: old version was missing
+  some license information
+- Corrected examples in `http_signing.md`, added auto-tests to
+  automatically validate these examples
+
+## 1.1.0
+
+- Bump version of `sshpk` dependency, remove peerDependency on it since
+  it now supports exchanging objects between multiple versions of itself
+  where possible
+
+## 1.0.2
+
+- Bump min version of `jsprim` dependency, to include fixes for using
+  http-signature with `browserify`
+
+## 1.0.1
+
+- Bump minimum version of `sshpk` dependency, to include fixes for
+  whitespace tolerance in key parsing.
+
+## 1.0.0
+
+- First semver release.
+- #36: Ensure verifySignature does not leak useful timing information
+- #42: Bring the library up to the latest version of the spec (including the 
+       request-target changes)
+- Support for ECDSA keys and signatures.
+- Now uses `sshpk` for key parsing, validation and conversion.
+- Fixes for #21, #47, #39 and compatibility with node 0.8
+
+## 0.11.0
+
+- Split up HMAC and Signature verification to avoid vulnerabilities where a
+  key intended for use with one can be validated against the other method
+  instead.
+
+## 0.10.2
+
+- Updated versions of most dependencies.
+- Utility functions exported for PEM => SSH-RSA conversion.
+- Improvements to tests and examples.
diff --git a/node_modules/http-signature/LICENSE b/node_modules/http-signature/LICENSE
new file mode 100644
index 0000000..f6d947d
--- /dev/null
+++ b/node_modules/http-signature/LICENSE
@@ -0,0 +1,18 @@
+Copyright Joyent, Inc. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
diff --git a/node_modules/http-signature/README.md b/node_modules/http-signature/README.md
new file mode 100644
index 0000000..de487d3
--- /dev/null
+++ b/node_modules/http-signature/README.md
@@ -0,0 +1,79 @@
+# node-http-signature
+
+node-http-signature is a node.js library that has client and server components
+for Joyent's [HTTP Signature Scheme](http_signing.md).
+
+## Usage
+
+Note the example below signs a request with the same key/cert used to start an
+HTTP server. This is almost certainly not what you actually want, but is just
+used to illustrate the API calls; you will need to provide your own key
+management in addition to this library.
+
+### Client
+
+```js
+var fs = require('fs');
+var https = require('https');
+var httpSignature = require('http-signature');
+
+var key = fs.readFileSync('./key.pem', 'ascii');
+
+var options = {
+  host: 'localhost',
+  port: 8443,
+  path: '/',
+  method: 'GET',
+  headers: {}
+};
+
+// Adds a 'Date' header in, signs it, and adds the
+// 'Authorization' header in.
+var req = https.request(options, function(res) {
+  console.log(res.statusCode);
+});
+
+
+httpSignature.sign(req, {
+  key: key,
+  keyId: './cert.pem'
+});
+
+req.end();
+```
+
+### Server
+
+```js
+var fs = require('fs');
+var https = require('https');
+var httpSignature = require('http-signature');
+
+var options = {
+  key: fs.readFileSync('./key.pem'),
+  cert: fs.readFileSync('./cert.pem')
+};
+
+https.createServer(options, function (req, res) {
+  var rc = 200;
+  var parsed = httpSignature.parseRequest(req);
+  var pub = fs.readFileSync(parsed.keyId, 'ascii');
+  if (!httpSignature.verifySignature(parsed, pub))
+    rc = 401;
+
+  res.writeHead(rc);
+  res.end();
+}).listen(8443);
+```
+
+## Installation
+
+    npm install http-signature
+
+## License
+
+MIT.
+
+## Bugs
+
+See <https://github.com/joyent/node-http-signature/issues>.
diff --git a/node_modules/http-signature/http_signing.md b/node_modules/http-signature/http_signing.md
new file mode 100644
index 0000000..4f24d28
--- /dev/null
+++ b/node_modules/http-signature/http_signing.md
@@ -0,0 +1,363 @@
+# Abstract
+
+This document describes a way to add origin authentication, message integrity,
+and replay resistance to HTTP REST requests.  It is intended to be used over
+the HTTPS protocol.
+
+# Copyright Notice
+
+Copyright (c) 2011 Joyent, Inc. and the persons identified as document authors.
+All rights reserved.
+
+Code Components extracted from this document must include MIT License text.
+
+# Introduction
+
+This protocol is intended to provide a standard way for clients to sign HTTP
+requests.  RFC2617 (HTTP Authentication) defines Basic and Digest authentication
+mechanisms, and RFC5246 (TLS 1.2) defines client-auth, both of which are widely
+employed on the Internet today.  However, it is common place that the burdens of
+PKI prevent web service operators from deploying that methodology, and so many
+fall back to Basic authentication, which has poor security characteristics.
+
+Additionally, OAuth provides a fully-specified alternative for authorization
+of web service requests, but is not (always) ideal for machine to machine
+communication, as the key acquisition steps (generally) imply a fixed
+infrastructure that may not make sense to a service provider (e.g., symmetric
+keys).
+
+Several web service providers have invented their own schemes for signing
+HTTP requests, but to date, none have been placed in the public domain as a
+standard.  This document serves that purpose.  There are no techniques in this
+proposal that are novel beyond previous art, however, this aims to be a simple
+mechanism for signing these requests.
+
+# Signature Authentication Scheme
+
+The "signature" authentication scheme is based on the model that the client must
+authenticate itself with a digital signature produced by either a private
+asymmetric key (e.g., RSA) or a shared symmetric key (e.g., HMAC).  The scheme
+is parameterized enough such that it is not bound to any particular key type or
+signing algorithm.  However, it does explicitly assume that clients can send an
+HTTP `Date` header.
+
+## Authorization Header
+
+The client is expected to send an Authorization header (as defined in RFC 2617)
+with the following parameterization:
+
+    credentials := "Signature" params
+    params := 1#(keyId | algorithm | [headers] | [ext] | signature)
+    digitalSignature := plain-string
+
+    keyId := "keyId" "=" <"> plain-string <">
+    algorithm := "algorithm" "=" <"> plain-string <">
+    headers := "headers" "=" <"> 1#headers-value <">
+    ext := "ext" "=" <"> plain-string <">
+    signature := "signature" "=" <"> plain-string <">
+
+    headers-value := plain-string
+    plain-string   = 1*( %x20-21 / %x23-5B / %x5D-7E )
+
+### Signature Parameters
+
+#### keyId
+
+REQUIRED.  The `keyId` field is an opaque string that the server can use to look
+up the component they need to validate the signature.  It could be an SSH key
+fingerprint, an LDAP DN, etc.  Management of keys and assignment of `keyId` is
+out of scope for this document.
+
+#### algorithm
+
+REQUIRED. The `algorithm` parameter is used if the client and server agree on a
+non-standard digital signature algorithm.  The full list of supported signature
+mechanisms is listed below.
+
+#### headers
+
+OPTIONAL.  The `headers` parameter is used to specify the list of HTTP headers
+used to sign the request.  If specified, it should be a quoted list of HTTP
+header names, separated by a single space character.  By default, only one
+HTTP header is signed, which is the `Date` header.  Note that the list MUST be
+specified in the order the values are concatenated together during signing. To
+include the HTTP request line in the signature calculation, use the special
+`request-line` value.  While this is overloading the definition of `headers` in
+HTTP linguism, the request-line is defined in RFC 2616, and as the outlier from
+headers in useful signature calculation, it is deemed simpler to simply use
+`request-line` than to add a separate parameter for it.
+
+#### extensions
+
+OPTIONAL.  The `extensions` parameter is used to include additional information
+which is covered by the request.  The content and format of the string is out of
+scope for this document, and expected to be specified by implementors.
+
+#### signature
+
+REQUIRED.  The `signature` parameter is a `Base64` encoded digital signature
+generated by the client. The client uses the `algorithm` and `headers` request
+parameters to form a canonicalized `signing string`.  This `signing string` is
+then signed with the key associated with `keyId` and the algorithm
+corresponding to `algorithm`.  The `signature` parameter is then set to the
+`Base64` encoding of the signature.
+
+### Signing String Composition
+
+In order to generate the string that is signed with a key, the client MUST take
+the values of each HTTP header specified by `headers` in the order they appear.
+
+1. If the header name is not `request-line` then append the lowercased header
+   name followed with an ASCII colon `:` and an ASCII space ` `.
+2. If the header name is `request-line` then append the HTTP request line,
+   otherwise append the header value.
+3. If value is not the last value then append an ASCII newline `\n`. The string
+   MUST NOT include a trailing ASCII newline.
+
+# Example Requests
+
+All requests refer to the following request (body omitted):
+
+    POST /foo HTTP/1.1
+    Host: example.org
+    Date: Tue, 07 Jun 2014 20:51:35 GMT
+    Content-Type: application/json
+    Digest: SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=
+    Content-Length: 18
+
+The "rsa-key-1" keyId refers to a private key known to the client and a public
+key known to the server. The "hmac-key-1" keyId refers to key known to the
+client and server.
+
+## Default parameterization
+
+The authorization header and signature would be generated as:
+
+    Authorization: Signature keyId="rsa-key-1",algorithm="rsa-sha256",signature="Base64(RSA-SHA256(signing string))"
+
+The client would compose the signing string as:
+
+    date: Tue, 07 Jun 2014 20:51:35 GMT
+
+## Header List
+
+The authorization header and signature would be generated as:
+
+    Authorization: Signature keyId="rsa-key-1",algorithm="rsa-sha256",headers="(request-target) date content-type digest",signature="Base64(RSA-SHA256(signing string))"
+
+The client would compose the signing string as (`+ "\n"` inserted for
+readability):
+
+    (request-target) post /foo + "\n"
+    date: Tue, 07 Jun 2011 20:51:35 GMT + "\n"
+    content-type: application/json + "\n"
+    digest: SHA-256=Base64(SHA256(Body))
+
+## Algorithm
+
+The authorization header and signature would be generated as:
+
+    Authorization: Signature keyId="hmac-key-1",algorithm="hmac-sha1",signature="Base64(HMAC-SHA1(signing string))"
+
+The client would compose the signing string as:
+
+    date: Tue, 07 Jun 2011 20:51:35 GMT
+
+# Signing Algorithms
+
+Currently supported algorithm names are:
+
+* rsa-sha1
+* rsa-sha256
+* rsa-sha512
+* dsa-sha1
+* hmac-sha1
+* hmac-sha256
+* hmac-sha512
+
+# Security Considerations
+
+## Default Parameters
+
+Note the default parameterization of the `Signature` scheme is only safe if all
+requests are carried over a secure transport (i.e., TLS).  Sending the default
+scheme over a non-secure transport will leave the request vulnerable to
+spoofing, tampering, replay/repudiation, and integrity violations (if using the
+STRIDE threat-modeling methodology).
+
+## Insecure Transports
+
+If sending the request over plain HTTP, service providers SHOULD require clients
+to sign ALL HTTP headers, and the `request-line`.  Additionally, service
+providers SHOULD require `Content-MD5` calculations to be performed to ensure
+against any tampering from clients.
+
+## Nonces
+
+Nonces are out of scope for this document simply because many service providers
+fail to implement them correctly, or do not adopt security specifications
+because of the infrastructure complexity.  Given the `header` parameterization,
+a service provider is fully enabled to add nonce semantics into this scheme by
+using something like an `x-request-nonce` header, and ensuring it is signed
+with the `Date` header.
+
+## Clock Skew
+
+As the default scheme is to sign the `Date` header, service providers SHOULD
+protect against logged replay attacks by enforcing a clock skew.  The server
+SHOULD be synchronized with NTP, and the recommendation in this specification
+is to allow 300s of clock skew (in either direction).
+
+## Required Headers to Sign
+
+It is out of scope for this document to dictate what headers a service provider
+will want to enforce, but service providers SHOULD at minimum include the
+`Date` header.
+
+# References
+
+## Normative References
+
+* [RFC2616] Hypertext Transfer Protocol -- HTTP/1.1
+* [RFC2617] HTTP Authentication: Basic and Digest Access Authentication
+* [RFC5246] The Transport Layer Security (TLS) Protocol Version 1.2
+
+## Informative References
+
+    Name: Mark Cavage (editor)
+    Company: Joyent, Inc.
+    Email: mark.cavage@joyent.com
+    URI: http://www.joyent.com
+
+# Appendix A - Test Values
+
+The following test data uses the RSA (1024b) keys, which we will refer
+to as `keyId=Test` in the following samples:
+
+    -----BEGIN PUBLIC KEY-----
+    MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCFENGw33yGihy92pDjZQhl0C3
+    6rPJj+CvfSC8+q28hxA161QFNUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6
+    Z4UMR7EOcpfdUE9Hf3m/hs+FUR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJw
+    oYi+1hqp1fIekaxsyQIDAQAB
+    -----END PUBLIC KEY-----
+
+    -----BEGIN RSA PRIVATE KEY-----
+    MIICXgIBAAKBgQDCFENGw33yGihy92pDjZQhl0C36rPJj+CvfSC8+q28hxA161QF
+    NUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6Z4UMR7EOcpfdUE9Hf3m/hs+F
+    UR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJwoYi+1hqp1fIekaxsyQIDAQAB
+    AoGBAJR8ZkCUvx5kzv+utdl7T5MnordT1TvoXXJGXK7ZZ+UuvMNUCdN2QPc4sBiA
+    QWvLw1cSKt5DsKZ8UETpYPy8pPYnnDEz2dDYiaew9+xEpubyeW2oH4Zx71wqBtOK
+    kqwrXa/pzdpiucRRjk6vE6YY7EBBs/g7uanVpGibOVAEsqH1AkEA7DkjVH28WDUg
+    f1nqvfn2Kj6CT7nIcE3jGJsZZ7zlZmBmHFDONMLUrXR/Zm3pR5m0tCmBqa5RK95u
+    412jt1dPIwJBANJT3v8pnkth48bQo/fKel6uEYyboRtA5/uHuHkZ6FQF7OUkGogc
+    mSJluOdc5t6hI1VsLn0QZEjQZMEOWr+wKSMCQQCC4kXJEsHAve77oP6HtG/IiEn7
+    kpyUXRNvFsDE0czpJJBvL/aRFUJxuRK91jhjC68sA7NsKMGg5OXb5I5Jj36xAkEA
+    gIT7aFOYBFwGgQAQkWNKLvySgKbAZRTeLBacpHMuQdl1DfdntvAyqpAZ0lY0RKmW
+    G6aFKaqQfOXKCyWoUiVknQJAXrlgySFci/2ueKlIE1QqIiLSZ8V8OlpFLRnb1pzI
+    7U1yQXnTAEFYM560yJlzUpOb1V4cScGd365tiSMvxLOvTA==
+    -----END RSA PRIVATE KEY-----
+
+And all examples use this request:
+
+<!-- httpreq -->
+
+    POST /foo?param=value&pet=dog HTTP/1.1
+    Host: example.com
+    Date: Thu, 05 Jan 2014 21:31:40 GMT
+    Content-Type: application/json
+    Digest: SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=
+    Content-Length: 18
+
+    {"hello": "world"}
+
+<!-- /httpreq -->
+
+### Default
+
+The string to sign would be:
+
+<!-- sign {"name": "Default", "options": {"keyId":"Test", "algorithm": "rsa-sha256"}} -->
+<!-- signstring -->
+
+    date: Thu, 05 Jan 2014 21:31:40 GMT
+
+<!-- /signstring -->
+
+The Authorization header would be:
+
+<!-- authz -->
+
+    Authorization: Signature keyId="Test",algorithm="rsa-sha256",headers="date",signature="jKyvPcxB4JbmYY4mByyBY7cZfNl4OW9HpFQlG7N4YcJPteKTu4MWCLyk+gIr0wDgqtLWf9NLpMAMimdfsH7FSWGfbMFSrsVTHNTk0rK3usrfFnti1dxsM4jl0kYJCKTGI/UWkqiaxwNiKqGcdlEDrTcUhhsFsOIo8VhddmZTZ8w="
+
+<!-- /authz -->
+
+### All Headers
+
+Parameterized to include all headers, the string to sign would be (`+ "\n"`
+inserted for readability):
+
+<!-- sign {"name": "All Headers", "options": {"keyId":"Test", "algorithm": "rsa-sha256", "headers": ["(request-target)", "host", "date", "content-type", "digest", "content-length"]}} -->
+<!-- signstring -->
+
+    (request-target): post /foo?param=value&pet=dog
+    host: example.com
+    date: Thu, 05 Jan 2014 21:31:40 GMT
+    content-type: application/json
+    digest: SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=
+    content-length: 18
+
+<!-- /signstring -->
+
+The Authorization header would be:
+
+<!-- authz -->
+
+    Authorization: Signature keyId="Test",algorithm="rsa-sha256",headers="(request-target) host date content-type digest content-length",signature="Ef7MlxLXoBovhil3AlyjtBwAL9g4TN3tibLj7uuNB3CROat/9KaeQ4hW2NiJ+pZ6HQEOx9vYZAyi+7cmIkmJszJCut5kQLAwuX+Ms/mUFvpKlSo9StS2bMXDBNjOh4Auj774GFj4gwjS+3NhFeoqyr/MuN6HsEnkvn6zdgfE2i0="
+
+<!-- /authz -->
+
+## Generating and verifying signatures using `openssl`
+
+The `openssl` commandline tool can be used to generate or verify the signatures listed above.
+
+Compose the signing string as usual, and pipe it into the the `openssl dgst` command, then into `openssl enc -base64`, as follows:
+
+    $ printf 'date: Thu, 05 Jan 2014 21:31:40 GMT' | \
+      openssl dgst -binary -sign /path/to/private.pem -sha256 | \
+      openssl enc -base64
+    jKyvPcxB4JbmYY4mByyBY7cZfNl4OW9Hp...
+    $
+
+The `-sha256` option is necessary to produce an `rsa-sha256` signature. You can select other hash algorithms such as `sha1` by changing this argument.
+
+To verify a signature, first save the signature data, Base64-decoded, into a file, then use `openssl dgst` again with the `-verify` option:
+
+    $ echo 'jKyvPcxB4JbmYY4mByy...' | openssl enc -A -d -base64 > signature
+    $ printf 'date: Thu, 05 Jan 2014 21:31:40 GMT' | \
+      openssl dgst -sha256 -verify /path/to/public.pem -signature ./signature
+    Verified OK
+    $
+
+## Generating and verifying signatures using `sshpk-sign`
+
+You can also generate and check signatures using the `sshpk-sign` tool which is
+included with the `sshpk` package in `npm`.
+
+Compose the signing string as above, and pipe it into `sshpk-sign` as follows:
+
+    $ printf 'date: Thu, 05 Jan 2014 21:31:40 GMT' | \
+      sshpk-sign -i /path/to/private.pem
+    jKyvPcxB4JbmYY4mByyBY7cZfNl4OW9Hp...
+    $
+
+This will produce an `rsa-sha256` signature by default, as you can see using
+the `-v` option:
+
+    sshpk-sign: using rsa-sha256 with a 1024 bit key
+
+You can also use `sshpk-verify` in a similar manner:
+
+    $ printf 'date: Thu, 05 Jan 2014 21:31:40 GMT' | \
+      sshpk-verify -i ./public.pem -s 'jKyvPcxB4JbmYY...'
+    OK
+    $
diff --git a/node_modules/http-signature/lib/index.js b/node_modules/http-signature/lib/index.js
new file mode 100644
index 0000000..54d4603
--- /dev/null
+++ b/node_modules/http-signature/lib/index.js
@@ -0,0 +1,29 @@
+// Copyright 2015 Joyent, Inc.
+
+var parser = require('./parser');
+var signer = require('./signer');
+var verify = require('./verify');
+var utils = require('./utils');
+
+
+
+///--- API
+
+module.exports = {
+
+  parse: parser.parseRequest,
+  parseRequest: parser.parseRequest,
+
+  sign: signer.signRequest,
+  signRequest: signer.signRequest,
+  createSigner: signer.createSigner,
+  isSigner: signer.isSigner,
+
+  sshKeyToPEM: utils.sshKeyToPEM,
+  sshKeyFingerprint: utils.fingerprint,
+  pemToRsaSSHKey: utils.pemToRsaSSHKey,
+
+  verify: verify.verifySignature,
+  verifySignature: verify.verifySignature,
+  verifyHMAC: verify.verifyHMAC
+};
diff --git a/node_modules/http-signature/lib/parser.js b/node_modules/http-signature/lib/parser.js
new file mode 100644
index 0000000..5994a7e
--- /dev/null
+++ b/node_modules/http-signature/lib/parser.js
@@ -0,0 +1,315 @@
+// Copyright 2012 Joyent, Inc.  All rights reserved.
+
+var assert = require('assert-plus');
+var util = require('util');
+var utils = require('./utils');
+
+
+
+///--- Globals
+
+var HASH_ALGOS = utils.HASH_ALGOS;
+var PK_ALGOS = utils.PK_ALGOS;
+var HttpSignatureError = utils.HttpSignatureError;
+var InvalidAlgorithmError = utils.InvalidAlgorithmError;
+var validateAlgorithm = utils.validateAlgorithm;
+
+var State = {
+  New: 0,
+  Params: 1
+};
+
+var ParamsState = {
+  Name: 0,
+  Quote: 1,
+  Value: 2,
+  Comma: 3
+};
+
+
+///--- Specific Errors
+
+
+function ExpiredRequestError(message) {
+  HttpSignatureError.call(this, message, ExpiredRequestError);
+}
+util.inherits(ExpiredRequestError, HttpSignatureError);
+
+
+function InvalidHeaderError(message) {
+  HttpSignatureError.call(this, message, InvalidHeaderError);
+}
+util.inherits(InvalidHeaderError, HttpSignatureError);
+
+
+function InvalidParamsError(message) {
+  HttpSignatureError.call(this, message, InvalidParamsError);
+}
+util.inherits(InvalidParamsError, HttpSignatureError);
+
+
+function MissingHeaderError(message) {
+  HttpSignatureError.call(this, message, MissingHeaderError);
+}
+util.inherits(MissingHeaderError, HttpSignatureError);
+
+function StrictParsingError(message) {
+  HttpSignatureError.call(this, message, StrictParsingError);
+}
+util.inherits(StrictParsingError, HttpSignatureError);
+
+///--- Exported API
+
+module.exports = {
+
+  /**
+   * Parses the 'Authorization' header out of an http.ServerRequest object.
+   *
+   * Note that this API will fully validate the Authorization header, and throw
+   * on any error.  It will not however check the signature, or the keyId format
+   * as those are specific to your environment.  You can use the options object
+   * to pass in extra constraints.
+   *
+   * As a response object you can expect this:
+   *
+   *     {
+   *       "scheme": "Signature",
+   *       "params": {
+   *         "keyId": "foo",
+   *         "algorithm": "rsa-sha256",
+   *         "headers": [
+   *           "date" or "x-date",
+   *           "digest"
+   *         ],
+   *         "signature": "base64"
+   *       },
+   *       "signingString": "ready to be passed to crypto.verify()"
+   *     }
+   *
+   * @param {Object} request an http.ServerRequest.
+   * @param {Object} options an optional options object with:
+   *                   - clockSkew: allowed clock skew in seconds (default 300).
+   *                   - headers: required header names (def: date or x-date)
+   *                   - algorithms: algorithms to support (default: all).
+   *                   - strict: should enforce latest spec parsing
+   *                             (default: false).
+   * @return {Object} parsed out object (see above).
+   * @throws {TypeError} on invalid input.
+   * @throws {InvalidHeaderError} on an invalid Authorization header error.
+   * @throws {InvalidParamsError} if the params in the scheme are invalid.
+   * @throws {MissingHeaderError} if the params indicate a header not present,
+   *                              either in the request headers from the params,
+   *                              or not in the params from a required header
+   *                              in options.
+   * @throws {StrictParsingError} if old attributes are used in strict parsing
+   *                              mode.
+   * @throws {ExpiredRequestError} if the value of date or x-date exceeds skew.
+   */
+  parseRequest: function parseRequest(request, options) {
+    assert.object(request, 'request');
+    assert.object(request.headers, 'request.headers');
+    if (options === undefined) {
+      options = {};
+    }
+    if (options.headers === undefined) {
+      options.headers = [request.headers['x-date'] ? 'x-date' : 'date'];
+    }
+    assert.object(options, 'options');
+    assert.arrayOfString(options.headers, 'options.headers');
+    assert.optionalFinite(options.clockSkew, 'options.clockSkew');
+
+    var authzHeaderName = options.authorizationHeaderName || 'authorization';
+
+    if (!request.headers[authzHeaderName]) {
+      throw new MissingHeaderError('no ' + authzHeaderName + ' header ' +
+                                   'present in the request');
+    }
+
+    options.clockSkew = options.clockSkew || 300;
+
+
+    var i = 0;
+    var state = State.New;
+    var substate = ParamsState.Name;
+    var tmpName = '';
+    var tmpValue = '';
+
+    var parsed = {
+      scheme: '',
+      params: {},
+      signingString: ''
+    };
+
+    var authz = request.headers[authzHeaderName];
+    for (i = 0; i < authz.length; i++) {
+      var c = authz.charAt(i);
+
+      switch (Number(state)) {
+
+      case State.New:
+        if (c !== ' ') parsed.scheme += c;
+        else state = State.Params;
+        break;
+
+      case State.Params:
+        switch (Number(substate)) {
+
+        case ParamsState.Name:
+          var code = c.charCodeAt(0);
+          // restricted name of A-Z / a-z
+          if ((code >= 0x41 && code <= 0x5a) || // A-Z
+              (code >= 0x61 && code <= 0x7a)) { // a-z
+            tmpName += c;
+          } else if (c === '=') {
+            if (tmpName.length === 0)
+              throw new InvalidHeaderError('bad param format');
+            substate = ParamsState.Quote;
+          } else {
+            throw new InvalidHeaderError('bad param format');
+          }
+          break;
+
+        case ParamsState.Quote:
+          if (c === '"') {
+            tmpValue = '';
+            substate = ParamsState.Value;
+          } else {
+            throw new InvalidHeaderError('bad param format');
+          }
+          break;
+
+        case ParamsState.Value:
+          if (c === '"') {
+            parsed.params[tmpName] = tmpValue;
+            substate = ParamsState.Comma;
+          } else {
+            tmpValue += c;
+          }
+          break;
+
+        case ParamsState.Comma:
+          if (c === ',') {
+            tmpName = '';
+            substate = ParamsState.Name;
+          } else {
+            throw new InvalidHeaderError('bad param format');
+          }
+          break;
+
+        default:
+          throw new Error('Invalid substate');
+        }
+        break;
+
+      default:
+        throw new Error('Invalid substate');
+      }
+
+    }
+
+    if (!parsed.params.headers || parsed.params.headers === '') {
+      if (request.headers['x-date']) {
+        parsed.params.headers = ['x-date'];
+      } else {
+        parsed.params.headers = ['date'];
+      }
+    } else {
+      parsed.params.headers = parsed.params.headers.split(' ');
+    }
+
+    // Minimally validate the parsed object
+    if (!parsed.scheme || parsed.scheme !== 'Signature')
+      throw new InvalidHeaderError('scheme was not "Signature"');
+
+    if (!parsed.params.keyId)
+      throw new InvalidHeaderError('keyId was not specified');
+
+    if (!parsed.params.algorithm)
+      throw new InvalidHeaderError('algorithm was not specified');
+
+    if (!parsed.params.signature)
+      throw new InvalidHeaderError('signature was not specified');
+
+    // Check the algorithm against the official list
+    parsed.params.algorithm = parsed.params.algorithm.toLowerCase();
+    try {
+      validateAlgorithm(parsed.params.algorithm);
+    } catch (e) {
+      if (e instanceof InvalidAlgorithmError)
+        throw (new InvalidParamsError(parsed.params.algorithm + ' is not ' +
+          'supported'));
+      else
+        throw (e);
+    }
+
+    // Build the signingString
+    for (i = 0; i < parsed.params.headers.length; i++) {
+      var h = parsed.params.headers[i].toLowerCase();
+      parsed.params.headers[i] = h;
+
+      if (h === 'request-line') {
+        if (!options.strict) {
+          /*
+           * We allow headers from the older spec drafts if strict parsing isn't
+           * specified in options.
+           */
+          parsed.signingString +=
+            request.method + ' ' + request.url + ' HTTP/' + request.httpVersion;
+        } else {
+          /* Strict parsing doesn't allow older draft headers. */
+          throw (new StrictParsingError('request-line is not a valid header ' +
+            'with strict parsing enabled.'));
+        }
+      } else if (h === '(request-target)') {
+        parsed.signingString +=
+          '(request-target): ' + request.method.toLowerCase() + ' ' +
+          request.url;
+      } else {
+        var value = request.headers[h];
+        if (value === undefined)
+          throw new MissingHeaderError(h + ' was not in the request');
+        parsed.signingString += h + ': ' + value;
+      }
+
+      if ((i + 1) < parsed.params.headers.length)
+        parsed.signingString += '\n';
+    }
+
+    // Check against the constraints
+    var date;
+    if (request.headers.date || request.headers['x-date']) {
+        if (request.headers['x-date']) {
+          date = new Date(request.headers['x-date']);
+        } else {
+          date = new Date(request.headers.date);
+        }
+      var now = new Date();
+      var skew = Math.abs(now.getTime() - date.getTime());
+
+      if (skew > options.clockSkew * 1000) {
+        throw new ExpiredRequestError('clock skew of ' +
+                                      (skew / 1000) +
+                                      's was greater than ' +
+                                      options.clockSkew + 's');
+      }
+    }
+
+    options.headers.forEach(function (hdr) {
+      // Remember that we already checked any headers in the params
+      // were in the request, so if this passes we're good.
+      if (parsed.params.headers.indexOf(hdr.toLowerCase()) < 0)
+        throw new MissingHeaderError(hdr + ' was not a signed header');
+    });
+
+    if (options.algorithms) {
+      if (options.algorithms.indexOf(parsed.params.algorithm) === -1)
+        throw new InvalidParamsError(parsed.params.algorithm +
+                                     ' is not a supported algorithm');
+    }
+
+    parsed.algorithm = parsed.params.algorithm.toUpperCase();
+    parsed.keyId = parsed.params.keyId;
+    return parsed;
+  }
+
+};
diff --git a/node_modules/http-signature/lib/signer.js b/node_modules/http-signature/lib/signer.js
new file mode 100644
index 0000000..deb5878
--- /dev/null
+++ b/node_modules/http-signature/lib/signer.js
@@ -0,0 +1,401 @@
+// Copyright 2012 Joyent, Inc.  All rights reserved.
+
+var assert = require('assert-plus');
+var crypto = require('crypto');
+var http = require('http');
+var util = require('util');
+var sshpk = require('sshpk');
+var jsprim = require('jsprim');
+var utils = require('./utils');
+
+var sprintf = require('util').format;
+
+var HASH_ALGOS = utils.HASH_ALGOS;
+var PK_ALGOS = utils.PK_ALGOS;
+var InvalidAlgorithmError = utils.InvalidAlgorithmError;
+var HttpSignatureError = utils.HttpSignatureError;
+var validateAlgorithm = utils.validateAlgorithm;
+
+///--- Globals
+
+var AUTHZ_FMT =
+  'Signature keyId="%s",algorithm="%s",headers="%s",signature="%s"';
+
+///--- Specific Errors
+
+function MissingHeaderError(message) {
+  HttpSignatureError.call(this, message, MissingHeaderError);
+}
+util.inherits(MissingHeaderError, HttpSignatureError);
+
+function StrictParsingError(message) {
+  HttpSignatureError.call(this, message, StrictParsingError);
+}
+util.inherits(StrictParsingError, HttpSignatureError);
+
+/* See createSigner() */
+function RequestSigner(options) {
+  assert.object(options, 'options');
+
+  var alg = [];
+  if (options.algorithm !== undefined) {
+    assert.string(options.algorithm, 'options.algorithm');
+    alg = validateAlgorithm(options.algorithm);
+  }
+  this.rs_alg = alg;
+
+  /*
+   * RequestSigners come in two varieties: ones with an rs_signFunc, and ones
+   * with an rs_signer.
+   *
+   * rs_signFunc-based RequestSigners have to build up their entire signing
+   * string within the rs_lines array and give it to rs_signFunc as a single
+   * concat'd blob. rs_signer-based RequestSigners can add a line at a time to
+   * their signing state by using rs_signer.update(), thus only needing to
+   * buffer the hash function state and one line at a time.
+   */
+  if (options.sign !== undefined) {
+    assert.func(options.sign, 'options.sign');
+    this.rs_signFunc = options.sign;
+
+  } else if (alg[0] === 'hmac' && options.key !== undefined) {
+    assert.string(options.keyId, 'options.keyId');
+    this.rs_keyId = options.keyId;
+
+    if (typeof (options.key) !== 'string' && !Buffer.isBuffer(options.key))
+      throw (new TypeError('options.key for HMAC must be a string or Buffer'));
+
+    /*
+     * Make an rs_signer for HMACs, not a rs_signFunc -- HMACs digest their
+     * data in chunks rather than requiring it all to be given in one go
+     * at the end, so they are more similar to signers than signFuncs.
+     */
+    this.rs_signer = crypto.createHmac(alg[1].toUpperCase(), options.key);
+    this.rs_signer.sign = function () {
+      var digest = this.digest('base64');
+      return ({
+        hashAlgorithm: alg[1],
+        toString: function () { return (digest); }
+      });
+    };
+
+  } else if (options.key !== undefined) {
+    var key = options.key;
+    if (typeof (key) === 'string' || Buffer.isBuffer(key))
+      key = sshpk.parsePrivateKey(key);
+
+    assert.ok(sshpk.PrivateKey.isPrivateKey(key, [1, 2]),
+      'options.key must be a sshpk.PrivateKey');
+    this.rs_key = key;
+
+    assert.string(options.keyId, 'options.keyId');
+    this.rs_keyId = options.keyId;
+
+    if (!PK_ALGOS[key.type]) {
+      throw (new InvalidAlgorithmError(key.type.toUpperCase() + ' type ' +
+        'keys are not supported'));
+    }
+
+    if (alg[0] !== undefined && key.type !== alg[0]) {
+      throw (new InvalidAlgorithmError('options.key must be a ' +
+        alg[0].toUpperCase() + ' key, was given a ' +
+        key.type.toUpperCase() + ' key instead'));
+    }
+
+    this.rs_signer = key.createSign(alg[1]);
+
+  } else {
+    throw (new TypeError('options.sign (func) or options.key is required'));
+  }
+
+  this.rs_headers = [];
+  this.rs_lines = [];
+}
+
+/**
+ * Adds a header to be signed, with its value, into this signer.
+ *
+ * @param {String} header
+ * @param {String} value
+ * @return {String} value written
+ */
+RequestSigner.prototype.writeHeader = function (header, value) {
+  assert.string(header, 'header');
+  header = header.toLowerCase();
+  assert.string(value, 'value');
+
+  this.rs_headers.push(header);
+
+  if (this.rs_signFunc) {
+    this.rs_lines.push(header + ': ' + value);
+
+  } else {
+    var line = header + ': ' + value;
+    if (this.rs_headers.length > 0)
+      line = '\n' + line;
+    this.rs_signer.update(line);
+  }
+
+  return (value);
+};
+
+/**
+ * Adds a default Date header, returning its value.
+ *
+ * @return {String}
+ */
+RequestSigner.prototype.writeDateHeader = function () {
+  return (this.writeHeader('date', jsprim.rfc1123(new Date())));
+};
+
+/**
+ * Adds the request target line to be signed.
+ *
+ * @param {String} method, HTTP method (e.g. 'get', 'post', 'put')
+ * @param {String} path
+ */
+RequestSigner.prototype.writeTarget = function (method, path) {
+  assert.string(method, 'method');
+  assert.string(path, 'path');
+  method = method.toLowerCase();
+  this.writeHeader('(request-target)', method + ' ' + path);
+};
+
+/**
+ * Calculate the value for the Authorization header on this request
+ * asynchronously.
+ *
+ * @param {Func} callback (err, authz)
+ */
+RequestSigner.prototype.sign = function (cb) {
+  assert.func(cb, 'callback');
+
+  if (this.rs_headers.length < 1)
+    throw (new Error('At least one header must be signed'));
+
+  var alg, authz;
+  if (this.rs_signFunc) {
+    var data = this.rs_lines.join('\n');
+    var self = this;
+    this.rs_signFunc(data, function (err, sig) {
+      if (err) {
+        cb(err);
+        return;
+      }
+      try {
+        assert.object(sig, 'signature');
+        assert.string(sig.keyId, 'signature.keyId');
+        assert.string(sig.algorithm, 'signature.algorithm');
+        assert.string(sig.signature, 'signature.signature');
+        alg = validateAlgorithm(sig.algorithm);
+
+        authz = sprintf(AUTHZ_FMT,
+          sig.keyId,
+          sig.algorithm,
+          self.rs_headers.join(' '),
+          sig.signature);
+      } catch (e) {
+        cb(e);
+        return;
+      }
+      cb(null, authz);
+    });
+
+  } else {
+    try {
+      var sigObj = this.rs_signer.sign();
+    } catch (e) {
+      cb(e);
+      return;
+    }
+    alg = (this.rs_alg[0] || this.rs_key.type) + '-' + sigObj.hashAlgorithm;
+    var signature = sigObj.toString();
+    authz = sprintf(AUTHZ_FMT,
+      this.rs_keyId,
+      alg,
+      this.rs_headers.join(' '),
+      signature);
+    cb(null, authz);
+  }
+};
+
+///--- Exported API
+
+module.exports = {
+  /**
+   * Identifies whether a given object is a request signer or not.
+   *
+   * @param {Object} object, the object to identify
+   * @returns {Boolean}
+   */
+  isSigner: function (obj) {
+    if (typeof (obj) === 'object' && obj instanceof RequestSigner)
+      return (true);
+    return (false);
+  },
+
+  /**
+   * Creates a request signer, used to asynchronously build a signature
+   * for a request (does not have to be an http.ClientRequest).
+   *
+   * @param {Object} options, either:
+   *                   - {String} keyId
+   *                   - {String|Buffer} key
+   *                   - {String} algorithm (optional, required for HMAC)
+   *                 or:
+   *                   - {Func} sign (data, cb)
+   * @return {RequestSigner}
+   */
+  createSigner: function createSigner(options) {
+    return (new RequestSigner(options));
+  },
+
+  /**
+   * Adds an 'Authorization' header to an http.ClientRequest object.
+   *
+   * Note that this API will add a Date header if it's not already set. Any
+   * other headers in the options.headers array MUST be present, or this
+   * will throw.
+   *
+   * You shouldn't need to check the return type; it's just there if you want
+   * to be pedantic.
+   *
+   * The optional flag indicates whether parsing should use strict enforcement
+   * of the version draft-cavage-http-signatures-04 of the spec or beyond.
+   * The default is to be loose and support
+   * older versions for compatibility.
+   *
+   * @param {Object} request an instance of http.ClientRequest.
+   * @param {Object} options signing parameters object:
+   *                   - {String} keyId required.
+   *                   - {String} key required (either a PEM or HMAC key).
+   *                   - {Array} headers optional; defaults to ['date'].
+   *                   - {String} algorithm optional (unless key is HMAC);
+   *                              default is the same as the sshpk default
+   *                              signing algorithm for the type of key given
+   *                   - {String} httpVersion optional; defaults to '1.1'.
+   *                   - {Boolean} strict optional; defaults to 'false'.
+   * @return {Boolean} true if Authorization (and optionally Date) were added.
+   * @throws {TypeError} on bad parameter types (input).
+   * @throws {InvalidAlgorithmError} if algorithm was bad or incompatible with
+   *                                 the given key.
+   * @throws {sshpk.KeyParseError} if key was bad.
+   * @throws {MissingHeaderError} if a header to be signed was specified but
+   *                              was not present.
+   */
+  signRequest: function signRequest(request, options) {
+    assert.object(request, 'request');
+    assert.object(options, 'options');
+    assert.optionalString(options.algorithm, 'options.algorithm');
+    assert.string(options.keyId, 'options.keyId');
+    assert.optionalArrayOfString(options.headers, 'options.headers');
+    assert.optionalString(options.httpVersion, 'options.httpVersion');
+
+    if (!request.getHeader('Date'))
+      request.setHeader('Date', jsprim.rfc1123(new Date()));
+    if (!options.headers)
+      options.headers = ['date'];
+    if (!options.httpVersion)
+      options.httpVersion = '1.1';
+
+    var alg = [];
+    if (options.algorithm) {
+      options.algorithm = options.algorithm.toLowerCase();
+      alg = validateAlgorithm(options.algorithm);
+    }
+
+    var i;
+    var stringToSign = '';
+    for (i = 0; i < options.headers.length; i++) {
+      if (typeof (options.headers[i]) !== 'string')
+        throw new TypeError('options.headers must be an array of Strings');
+
+      var h = options.headers[i].toLowerCase();
+
+      if (h === 'request-line') {
+        if (!options.strict) {
+          /**
+           * We allow headers from the older spec drafts if strict parsing isn't
+           * specified in options.
+           */
+          stringToSign +=
+            request.method + ' ' + request.path + ' HTTP/' +
+            options.httpVersion;
+        } else {
+          /* Strict parsing doesn't allow older draft headers. */
+          throw (new StrictParsingError('request-line is not a valid header ' +
+            'with strict parsing enabled.'));
+        }
+      } else if (h === '(request-target)') {
+        stringToSign +=
+          '(request-target): ' + request.method.toLowerCase() + ' ' +
+          request.path;
+      } else {
+        var value = request.getHeader(h);
+        if (value === undefined || value === '') {
+          throw new MissingHeaderError(h + ' was not in the request');
+        }
+        stringToSign += h + ': ' + value;
+      }
+
+      if ((i + 1) < options.headers.length)
+        stringToSign += '\n';
+    }
+
+    /* This is just for unit tests. */
+    if (request.hasOwnProperty('_stringToSign')) {
+      request._stringToSign = stringToSign;
+    }
+
+    var signature;
+    if (alg[0] === 'hmac') {
+      if (typeof (options.key) !== 'string' && !Buffer.isBuffer(options.key))
+        throw (new TypeError('options.key must be a string or Buffer'));
+
+      var hmac = crypto.createHmac(alg[1].toUpperCase(), options.key);
+      hmac.update(stringToSign);
+      signature = hmac.digest('base64');
+
+    } else {
+      var key = options.key;
+      if (typeof (key) === 'string' || Buffer.isBuffer(key))
+        key = sshpk.parsePrivateKey(options.key);
+
+      assert.ok(sshpk.PrivateKey.isPrivateKey(key, [1, 2]),
+        'options.key must be a sshpk.PrivateKey');
+
+      if (!PK_ALGOS[key.type]) {
+        throw (new InvalidAlgorithmError(key.type.toUpperCase() + ' type ' +
+          'keys are not supported'));
+      }
+
+      if (alg[0] !== undefined && key.type !== alg[0]) {
+        throw (new InvalidAlgorithmError('options.key must be a ' +
+          alg[0].toUpperCase() + ' key, was given a ' +
+          key.type.toUpperCase() + ' key instead'));
+      }
+
+      var signer = key.createSign(alg[1]);
+      signer.update(stringToSign);
+      var sigObj = signer.sign();
+      if (!HASH_ALGOS[sigObj.hashAlgorithm]) {
+        throw (new InvalidAlgorithmError(sigObj.hashAlgorithm.toUpperCase() +
+          ' is not a supported hash algorithm'));
+      }
+      options.algorithm = key.type + '-' + sigObj.hashAlgorithm;
+      signature = sigObj.toString();
+      assert.notStrictEqual(signature, '', 'empty signature produced');
+    }
+
+    var authzHeaderName = options.authorizationHeaderName || 'Authorization';
+
+    request.setHeader(authzHeaderName, sprintf(AUTHZ_FMT,
+                                               options.keyId,
+                                               options.algorithm,
+                                               options.headers.join(' '),
+                                               signature));
+
+    return true;
+  }
+
+};
diff --git a/node_modules/http-signature/lib/utils.js b/node_modules/http-signature/lib/utils.js
new file mode 100644
index 0000000..bbf2aa8
--- /dev/null
+++ b/node_modules/http-signature/lib/utils.js
@@ -0,0 +1,112 @@
+// Copyright 2012 Joyent, Inc.  All rights reserved.
+
+var assert = require('assert-plus');
+var sshpk = require('sshpk');
+var util = require('util');
+
+var HASH_ALGOS = {
+  'sha1': true,
+  'sha256': true,
+  'sha512': true
+};
+
+var PK_ALGOS = {
+  'rsa': true,
+  'dsa': true,
+  'ecdsa': true
+};
+
+function HttpSignatureError(message, caller) {
+  if (Error.captureStackTrace)
+    Error.captureStackTrace(this, caller || HttpSignatureError);
+
+  this.message = message;
+  this.name = caller.name;
+}
+util.inherits(HttpSignatureError, Error);
+
+function InvalidAlgorithmError(message) {
+  HttpSignatureError.call(this, message, InvalidAlgorithmError);
+}
+util.inherits(InvalidAlgorithmError, HttpSignatureError);
+
+function validateAlgorithm(algorithm) {
+  var alg = algorithm.toLowerCase().split('-');
+
+  if (alg.length !== 2) {
+    throw (new InvalidAlgorithmError(alg[0].toUpperCase() + ' is not a ' +
+      'valid algorithm'));
+  }
+
+  if (alg[0] !== 'hmac' && !PK_ALGOS[alg[0]]) {
+    throw (new InvalidAlgorithmError(alg[0].toUpperCase() + ' type keys ' +
+      'are not supported'));
+  }
+
+  if (!HASH_ALGOS[alg[1]]) {
+    throw (new InvalidAlgorithmError(alg[1].toUpperCase() + ' is not a ' +
+      'supported hash algorithm'));
+  }
+
+  return (alg);
+}
+
+///--- API
+
+module.exports = {
+
+  HASH_ALGOS: HASH_ALGOS,
+  PK_ALGOS: PK_ALGOS,
+
+  HttpSignatureError: HttpSignatureError,
+  InvalidAlgorithmError: InvalidAlgorithmError,
+
+  validateAlgorithm: validateAlgorithm,
+
+  /**
+   * Converts an OpenSSH public key (rsa only) to a PKCS#8 PEM file.
+   *
+   * The intent of this module is to interoperate with OpenSSL only,
+   * specifically the node crypto module's `verify` method.
+   *
+   * @param {String} key an OpenSSH public key.
+   * @return {String} PEM encoded form of the RSA public key.
+   * @throws {TypeError} on bad input.
+   * @throws {Error} on invalid ssh key formatted data.
+   */
+  sshKeyToPEM: function sshKeyToPEM(key) {
+    assert.string(key, 'ssh_key');
+
+    var k = sshpk.parseKey(key, 'ssh');
+    return (k.toString('pem'));
+  },
+
+
+  /**
+   * Generates an OpenSSH fingerprint from an ssh public key.
+   *
+   * @param {String} key an OpenSSH public key.
+   * @return {String} key fingerprint.
+   * @throws {TypeError} on bad input.
+   * @throws {Error} if what you passed doesn't look like an ssh public key.
+   */
+  fingerprint: function fingerprint(key) {
+    assert.string(key, 'ssh_key');
+
+    var k = sshpk.parseKey(key, 'ssh');
+    return (k.fingerprint('md5').toString('hex'));
+  },
+
+  /**
+   * Converts a PKGCS#8 PEM file to an OpenSSH public key (rsa)
+   *
+   * The reverse of the above function.
+   */
+  pemToRsaSSHKey: function pemToRsaSSHKey(pem, comment) {
+    assert.equal('string', typeof (pem), 'typeof pem');
+
+    var k = sshpk.parseKey(pem, 'pem');
+    k.comment = comment;
+    return (k.toString('ssh'));
+  }
+};
diff --git a/node_modules/http-signature/lib/verify.js b/node_modules/http-signature/lib/verify.js
new file mode 100644
index 0000000..b053fd6
--- /dev/null
+++ b/node_modules/http-signature/lib/verify.js
@@ -0,0 +1,88 @@
+// Copyright 2015 Joyent, Inc.
+
+var assert = require('assert-plus');
+var crypto = require('crypto');
+var sshpk = require('sshpk');
+var utils = require('./utils');
+
+var HASH_ALGOS = utils.HASH_ALGOS;
+var PK_ALGOS = utils.PK_ALGOS;
+var InvalidAlgorithmError = utils.InvalidAlgorithmError;
+var HttpSignatureError = utils.HttpSignatureError;
+var validateAlgorithm = utils.validateAlgorithm;
+
+///--- Exported API
+
+module.exports = {
+  /**
+   * Verify RSA/DSA signature against public key.  You are expected to pass in
+   * an object that was returned from `parse()`.
+   *
+   * @param {Object} parsedSignature the object you got from `parse`.
+   * @param {String} pubkey RSA/DSA private key PEM.
+   * @return {Boolean} true if valid, false otherwise.
+   * @throws {TypeError} if you pass in bad arguments.
+   * @throws {InvalidAlgorithmError}
+   */
+  verifySignature: function verifySignature(parsedSignature, pubkey) {
+    assert.object(parsedSignature, 'parsedSignature');
+    if (typeof (pubkey) === 'string' || Buffer.isBuffer(pubkey))
+      pubkey = sshpk.parseKey(pubkey);
+    assert.ok(sshpk.Key.isKey(pubkey, [1, 1]), 'pubkey must be a sshpk.Key');
+
+    var alg = validateAlgorithm(parsedSignature.algorithm);
+    if (alg[0] === 'hmac' || alg[0] !== pubkey.type)
+      return (false);
+
+    var v = pubkey.createVerify(alg[1]);
+    v.update(parsedSignature.signingString);
+    return (v.verify(parsedSignature.params.signature, 'base64'));
+  },
+
+  /**
+   * Verify HMAC against shared secret.  You are expected to pass in an object
+   * that was returned from `parse()`.
+   *
+   * @param {Object} parsedSignature the object you got from `parse`.
+   * @param {String} secret HMAC shared secret.
+   * @return {Boolean} true if valid, false otherwise.
+   * @throws {TypeError} if you pass in bad arguments.
+   * @throws {InvalidAlgorithmError}
+   */
+  verifyHMAC: function verifyHMAC(parsedSignature, secret) {
+    assert.object(parsedSignature, 'parsedHMAC');
+    assert.string(secret, 'secret');
+
+    var alg = validateAlgorithm(parsedSignature.algorithm);
+    if (alg[0] !== 'hmac')
+      return (false);
+
+    var hashAlg = alg[1].toUpperCase();
+
+    var hmac = crypto.createHmac(hashAlg, secret);
+    hmac.update(parsedSignature.signingString);
+
+    /*
+     * Now double-hash to avoid leaking timing information - there's
+     * no easy constant-time compare in JS, so we use this approach
+     * instead. See for more info:
+     * https://www.isecpartners.com/blog/2011/february/double-hmac-
+     * verification.aspx
+     */
+    var h1 = crypto.createHmac(hashAlg, secret);
+    h1.update(hmac.digest());
+    h1 = h1.digest();
+    var h2 = crypto.createHmac(hashAlg, secret);
+    h2.update(new Buffer(parsedSignature.params.signature, 'base64'));
+    h2 = h2.digest();
+
+    /* Node 0.8 returns strings from .digest(). */
+    if (typeof (h1) === 'string')
+      return (h1 === h2);
+    /* And node 0.10 lacks the .equals() method on Buffers. */
+    if (Buffer.isBuffer(h1) && !h1.equals)
+      return (h1.toString('binary') === h2.toString('binary'));
+
+    return (h1.equals(h2));
+  }
+};
diff --git a/node_modules/http-signature/package.json b/node_modules/http-signature/package.json
new file mode 100644
index 0000000..df07d53
--- /dev/null
+++ b/node_modules/http-signature/package.json
@@ -0,0 +1,39 @@
+{
+  "name": "http-signature",
+  "description": "Reference implementation of Joyent's HTTP Signature scheme.",
+  "version": "1.2.0",
+  "license": "MIT",
+  "author": "Joyent, Inc",
+  "contributors": [
+    "Mark Cavage <mcavage@gmail.com>",
+    "David I. Lehn <dil@lehn.org>",
+    "Patrick Mooney <patrick.f.mooney@gmail.com>"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/joyent/node-http-signature.git"
+  },
+  "homepage": "https://github.com/joyent/node-http-signature/",
+  "bugs": "https://github.com/joyent/node-http-signature/issues",
+  "keywords": [
+    "https",
+    "request"
+  ],
+  "engines": {
+    "node": ">=0.8",
+    "npm": ">=1.3.7"
+  },
+  "main": "lib/index.js",
+  "scripts": {
+    "test": "tap test/*.js"
+  },
+  "dependencies": {
+    "assert-plus": "^1.0.0",
+    "jsprim": "^1.2.2",
+    "sshpk": "^1.7.0"
+  },
+  "devDependencies": {
+    "tap": "0.4.2",
+    "uuid": "^2.0.2"
+  }
+}