From 109ae1f771ec5e8a5a9510c3b09fad579dab5ed7 Mon Sep 17 00:00:00 2001
From: Yigit Sever
Date: Fri, 16 Apr 2021 13:56:45 +0300
Subject: Improve auth documentation

---
 site/content/register_docs.md        | 26 +++++++++++++++-----------
 site/public/register-docs/index.html | 28 ++++++++++++++++------------
 site/public/search_index.en.js       |  2 +-
 3 files changed, 32 insertions(+), 24 deletions(-)

diff --git a/site/content/register_docs.md b/site/content/register_docs.md
index 83aef7f..a387838 100644
--- a/site/content/register_docs.md
+++ b/site/content/register_docs.md
@@ -4,36 +4,40 @@ description = "Register Documentation"
 weight = 3
 +++
 
-POST request to /register endpoint
+POST request to `/register` endpoint
 
 Lets a user to authenticate themselves to the system.
 Only people who are enrolled to the class can open Gradecoin accounts.
 This is enforced with your Student ID and a one time password you will receive.
 
 # Authentication Process
-- Gradecoin's Public Key (`gradecoin_public_key`) is listed on our Moodle page.
-- You pick a short temporary key (`k_temp`)
-- Create a JSON object (`auth_plaintext`) with your `metu_id` and `public key` in base64 (PEM) format (`S_PK`) [reference](https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem)
+
+> The bytes you are sending over the network are all Base64 Encoded
+
+- Gradecoin's Public Key (`gradecoin_public_key`) is listed on our Moodle page. Download and load it it to your client.
+- Create a JSON object (`P_AR`) with your `metu_id` ("e"+`6 chars`) and `public key` in base64 (PEM) format (`S_PK`) [reference](https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem)
 ```json
 {
-    "student_id": "e12345",
+    "student_id": "e123456",
     "passwd": "15 char secret",
     "public_key": "---BEGIN PUBLIC KEY..."
 }
 ```
 
-- Pick a random IV.
-- Encrypt the serialized string of `auth_plaintext` with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (`k_temp`), the result is `auth_ciphertext`. Encode this with base64.
-- The temporary key you have picked `k_temp` is encrypted using RSA with OAEP padding scheme
-using SHA-256 with `gradecoin_public_key`, giving us `key_ciphertext`. Encode this with base 64.
+- Pick a short temporary key (`k_temp`)
+- Pick a random IV (`iv`).
+- Encrypt the serialized string of `P_AR` with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (`k_temp`), the result is `C_AR`. Encode this with base64.
+- The temporary key you have picked `k_temp` is encrypted using RSA with OAEP padding scheme using SHA-256 with `gradecoin_public_key`, giving us `key_ciphertext`. Encode this with base64.
+- Base64 encode the IV (`iv`) as well.
 - The payload JSON object (`auth_request`) can be serialized now:
 
 ```json
 {
-    "c": "auth_ciphertext",
-    "iv": "hexadecimal",
+    "c": "C_AR",
+    "iv": "iv",
     "key": "key_ciphertext"
 }
 ```
 
 If your authentication process was valid, you will be given access and your public key fingerprint that is your address.
+You can now sign JWTs to send authorized transaction requests.
diff --git a/site/public/register-docs/index.html b/site/public/register-docs/index.html
index fdc5237..810f4ec 100644
--- a/site/public/register-docs/index.html
+++ b/site/public/register-docs/index.html
@@ -84,38 +84,42 @@
         <div class="content text">
             
 <div class="heading-text">Register Documentation</div>
-<p>POST request to /register endpoint</p>
+<p>POST request to <code>/register</code> endpoint</p>
 <p>Lets a user to authenticate themselves to the system.
 Only people who are enrolled to the class can open Gradecoin accounts.
 This is enforced with your Student ID and a one time password you will receive.</p>
 <h1 id="authentication-process">Authentication Process</h1>
+<blockquote>
+<p>The bytes you are sending over the network are all Base64 Encoded</p>
+</blockquote>
 <ul>
-<li>Gradecoin's Public Key (<code>gradecoin_public_key</code>) is listed on our Moodle page.</li>
-<li>You pick a short temporary key (<code>k_temp</code>)</li>
-<li>Create a JSON object (<code>auth_plaintext</code>) with your <code>metu_id</code> and <code>public key</code> in base64 (PEM) format (<code>S_PK</code>) <a href="https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem">reference</a></li>
+<li>Gradecoin's Public Key (<code>gradecoin_public_key</code>) is listed on our Moodle page. Download and load it it to your client.</li>
+<li>Create a JSON object (<code>P_AR</code>) with your <code>metu_id</code> (&quot;e&quot;+<code>6 chars</code>) and <code>public key</code> in base64 (PEM) format (<code>S_PK</code>) <a href="https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem">reference</a></li>
 </ul>
 <pre style="background-color:#ffffff;">
 <code class="language-json" data-lang="json"><span style="color:#545052;">{
-    &quot;</span><span style="color:#009854;">student_id</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">e12345</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">student_id</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">e123456</span><span style="color:#545052;">&quot;,
     &quot;</span><span style="color:#009854;">passwd</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">15 char secret</span><span style="color:#545052;">&quot;,
     &quot;</span><span style="color:#009854;">public_key</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">---BEGIN PUBLIC KEY...</span><span style="color:#545052;">&quot;
 }
 </span></code></pre>
 <ul>
-<li>Pick a random IV.</li>
-<li>Encrypt the serialized string of <code>auth_plaintext</code> with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (<code>k_temp</code>), the result is <code>auth_ciphertext</code>. Encode this with base64.</li>
-<li>The temporary key you have picked <code>k_temp</code> is encrypted using RSA with OAEP padding scheme
-using SHA-256 with <code>gradecoin_public_key</code>, giving us <code>key_ciphertext</code>. Encode this with base 64.</li>
+<li>Pick a short temporary key (<code>k_temp</code>)</li>
+<li>Pick a random IV (<code>iv</code>).</li>
+<li>Encrypt the serialized string of <code>P_AR</code> with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (<code>k_temp</code>), the result is <code>C_AR</code>. Encode this with base64.</li>
+<li>The temporary key you have picked <code>k_temp</code> is encrypted using RSA with OAEP padding scheme using SHA-256 with <code>gradecoin_public_key</code>, giving us <code>key_ciphertext</code>. Encode this with base64.</li>
+<li>Base64 encode the IV (<code>iv</code>) as well.</li>
 <li>The payload JSON object (<code>auth_request</code>) can be serialized now:</li>
 </ul>
 <pre style="background-color:#ffffff;">
 <code class="language-json" data-lang="json"><span style="color:#545052;">{
-    &quot;</span><span style="color:#009854;">c</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">auth_ciphertext</span><span style="color:#545052;">&quot;,
-    &quot;</span><span style="color:#009854;">iv</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">hexadecimal</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">c</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">C_AR</span><span style="color:#545052;">&quot;,
+    &quot;</span><span style="color:#009854;">iv</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">iv</span><span style="color:#545052;">&quot;,
     &quot;</span><span style="color:#009854;">key</span><span style="color:#545052;">&quot;: &quot;</span><span style="color:#009854;">key_ciphertext</span><span style="color:#545052;">&quot;
 }
 </span></code></pre>
-<p>If your authentication process was valid, you will be given access and your public key fingerprint that is your address.</p>
+<p>If your authentication process was valid, you will be given access and your public key fingerprint that is your address.
+You can now sign JWTs to send authorized transaction requests.</p>
 
 
         </div>
diff --git a/site/public/search_index.en.js b/site/public/search_index.en.js
index a5eeec0..6624c47 100644
--- a/site/public/search_index.en.js
+++ b/site/public/search_index.en.js
@@ -1 +1 @@
-window.searchIndex = 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Gradecoin is the faux currency we will use to simulate a blockchain network. At the end of the simulation, the amount of Gradecoin you hold will be your PA1 grade.\nA quick summary: authenticate yourself to the system using public key encryption.\nCraft Transaction proposals and tag them using JWTs.\nWhen there are enough transactions then you can propose Blocks in the same way.\nBlocks need to be mined beforehand using Proof-of-work, or brute force.\nGradecoin offers 3 endpoints at /register, /block and /transaction. You can only send GET requests to /block and /transaction without authorization.\nThe server is programmed in RESTful architecture, there are no DELETE, PUT or UPDATE operations, though.\nGradecoin uses a Proof-of-work block accepting mechanism. It uses single round Blake2s hashing which produces 256-bit (64 hexadecimal characters) output. The target hash is 24 bits or 6 hexadecimal characters of 0. During testing, I could mine a block on average around 2-7 minutes.\n\nWe're expecting you to use existing tools and implementations. Standards are hard. Don't roll your own crypto. Feel free to ask questions. Collaborate.\n\nYou might ask,\n\nBut if nobody has any Gradecoin then how do we have transactions?\n\nThere is a bank! Their public key is 31415926535897932384626433832795028841971693993751058209749445923 and they have some amount of Gradecoin preloaded. It's also the only account that you can send transactions requests to yourself.\nCoinbase\nThe first transactions of a block is called the coinbase. 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The simplicity of the system is how little interfaces it has.\nDon't know where to start? Gradecoin uses RESTful API; simple curl commands or even your browser will work! This website can help as well.\nJWT Debugger and the corresponding RFC\nRemember that you are absolutely encouraged to grab off-the-shelf implementations for every cryptography primitive you will use. You can start by finding a code snippet to generate a RSA keypair?\n\nI found a bug!\nThank you! Please let me know so we can solve it.\nI hacked the server!\nThat wasn't supposed to happen :( I did not place any intentional vulnerabilities to the system so if you cracked something, it was not intended. Please don't abuse it and let me know so I can patch it.\nSubmission?\nAt the end of the simulation, your Gradecoin balance will be your grade. I will also expect a unique client programmed in either;\n\nc\nc++\nperl\nrust\npython\nrandom assortment of bash scripts\n\nIf your favourite programming language is missing please let me know 🤷?\nCan my friends play?\nSadly, no. Student's who are enrolled to the class will receive one-time-passwords for authentication.\nHow and or Why?\n\nBuilt, with Rust\n\n","id":"https://gradecoin.xyz/","title":"Gradecoin"},"https://gradecoin.xyz/block-docs/":{"body":"A block that was proposed to commit Transactions in transaction_list to the\nledger with a nonce that made hash valid; 6 zeroes at the left hand side of the\nhash (24 bytes).\nWe are mining using blake2s algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.\nRequests\nGET\nA HTTP GET request to /block endpoint will return the latest mined block.\nPOST\nA HTTP POST request with Authorization using JWT will allow you to propose your own blocks.\nFields\ntransaction_list: [array of Fingerprints]\nnonce: unsigned 32-bit integer\ntimestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;\nhash: String\n\nISO 8601 Reference\n","id":"https://gradecoin.xyz/block-docs/","title":"Blocks"},"https://gradecoin.xyz/jwt/":{"body":"\nJSON Web Tokens are representations of claims, or authorization proofs that fit into the Header of HTTP requests.\n\nHow?\nJWTs are used as the MAC of operations that require authorization:\n\nblock proposal\ntransaction proposal.\n\nThey are send alongside the JSON request body in the Header;\nAuthorization: Bearer aaaaaa.bbbbbb.ccccc\n\nGradecoin uses 3 fields for the JWTs;\n{\n\"tha\": \"Hash of the payload, check invididual references\",\n\"iat\": \"Issued At, Unix Time\",\n\"exp\": \"Expiration Time, epoch\"\n}\n\n\ntha is explained in blocks and transactions documentations.\niat when the JWT was created in Unix Time format\nexp when the JWT will expire &amp; be rejected in Unix Time\n\nAlgorithm\nWe are using RS256, RSASSA-PKCS1-v1_5 using SHA-256. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works here.\nReferences\n\nRFC, the ultimate reference\nJWT Debugger\n\n","id":"https://gradecoin.xyz/jwt/","title":"JWT"},"https://gradecoin.xyz/register-docs/":{"body":"POST request to /register endpoint\nLets a user to authenticate themselves to the system.\nOnly people who are enrolled to the class can open Gradecoin accounts.\nThis is enforced with your Student ID and a one time password you will receive.\nAuthentication Process\n\nGradecoin's Public Key (gradecoin_public_key) is listed on our Moodle page.\nYou pick a short temporary key (k_temp)\nCreate a JSON object (auth_plaintext) with your metu_id and public key in base64 (PEM) format (S_PK) reference\n\n{\n    \"student_id\": \"e12345\",\n    \"passwd\": \"15 char secret\",\n    \"public_key\": \"---BEGIN PUBLIC KEY...\"\n}\n\n\nPick a random IV.\nEncrypt the serialized string of auth_plaintext with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (k_temp), the result is auth_ciphertext. Encode this with base64.\nThe temporary key you have picked k_temp is encrypted using RSA with OAEP padding scheme\nusing SHA-256 with gradecoin_public_key, giving us key_ciphertext. 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Gradecoin is the faux currency we will use to simulate a blockchain network. At the end of the simulation, the amount of Gradecoin you hold will be your PA1 grade.\nA quick summary: authenticate yourself to the system using public key encryption.\nCraft Transaction proposals and tag them using JWTs.\nWhen there are enough transactions then you can propose Blocks in the same way.\nBlocks need to be mined beforehand using Proof-of-work, or brute force.\nGradecoin offers 3 endpoints at /register, /block and /transaction. You can only send GET requests to /block and /transaction without authorization.\nThe server is programmed in RESTful architecture, there are no DELETE, PUT or UPDATE operations, though.\nGradecoin uses a Proof-of-work block accepting mechanism. It uses single round Blake2s hashing which produces 256-bit (64 hexadecimal characters) output. The target hash is 24 bits or 6 hexadecimal characters of 0. During testing, I could mine a block on average around 2-7 minutes.\n\nWe're expecting you to use existing tools and implementations. Standards are hard. Don't roll your own crypto. Feel free to ask questions. Collaborate.\n\nYou might ask,\n\nBut if nobody has any Gradecoin then how do we have transactions?\n\nThere is a bank! Their public key is 31415926535897932384626433832795028841971693993751058209749445923 and they have some amount of Gradecoin preloaded. It's also the only account that you can send transactions requests to yourself.\nCoinbase\nThe first transactions of a block is called the coinbase. They are the author of the block proposal and if the block is accepted then they get compensated for their efforts with some Gradecoin.\nPublic Key Signatures\nGradecoin uses 2048 bit RSA keyspairs.\nServices\n/register\n\nStudent creates their own 2048 bit RSA keypair\nDownloads Gradecoin's Public Key from Moodle\nEncrypts their JSON wrapped Public Key, Student ID and one time passwd using Gradecoin's Public Key\nTheir public key is now in our database and can be used to sign their JWT's during requests\n\n/transaction\n\nYou can offer a Transaction - POST request\n\nThe request should have Authorization\nThe request header should be signed by the Public Key of the by field in the transaction\n\n\nfetch the list of Transactions - GET request\n\n/block\n\noffer a [schema::Block] - POST request\n\nThe request should have Authorization\nThe [schema::Block::transaction_list] of the block should be a subset of [schema::Db::pending_transactions]\n\n\nfetch the last accepted [schema::Block] - GET request\n\nAuthorization: The request header should have Bearer JWT.Token signed with Student Public Key\nQuestions\nThis all sound complicated!\n\nI've drawn inspiration from actual Bitcoin transactions and warp. The simplicity of the system is how little interfaces it has.\nDon't know where to start? Gradecoin uses RESTful API; simple curl commands or even your browser will work! This website can help as well.\nJWT Debugger and the corresponding RFC\nRemember that you are absolutely encouraged to grab off-the-shelf implementations for every cryptography primitive you will use. You can start by finding a code snippet to generate a RSA keypair?\n\nI found a bug!\nThank you! Please let me know so we can solve it.\nI hacked the server!\nThat wasn't supposed to happen :( I did not place any intentional vulnerabilities to the system so if you cracked something, it was not intended. Please don't abuse it and let me know so I can patch it.\nSubmission?\nAt the end of the simulation, your Gradecoin balance will be your grade. I will also expect a unique client programmed in either;\n\nc\nc++\nperl\nrust\npython\nrandom assortment of bash scripts\n\nIf your favourite programming language is missing please let me know 🤷?\nCan my friends play?\nSadly, no. Student's who are enrolled to the class will receive one-time-passwords for authentication.\nHow and or Why?\n\nBuilt, with Rust\n\n","id":"https://gradecoin.xyz/","title":"Gradecoin"},"https://gradecoin.xyz/block-docs/":{"body":"A block that was proposed to commit Transactions in transaction_list to the\nledger with a nonce that made hash valid; 6 zeroes at the left hand side of the\nhash (24 bytes).\nWe are mining using blake2s algorithm, which produces 256 bit hashes. Hash/second is roughly 20x10^3 on my machine, a new block can be mined in around 4-6 minutes.\nRequests\nGET\nA HTTP GET request to /block endpoint will return the latest mined block.\nPOST\nA HTTP POST request with Authorization using JWT will allow you to propose your own blocks.\nFields\ntransaction_list: [array of Fingerprints]\nnonce: unsigned 32-bit integer\ntimestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;\nhash: String\n\nISO 8601 Reference\n","id":"https://gradecoin.xyz/block-docs/","title":"Blocks"},"https://gradecoin.xyz/jwt/":{"body":"\nJSON Web Tokens are representations of claims, or authorization proofs that fit into the Header of HTTP requests.\n\nHow?\nJWTs are used as the MAC of operations that require authorization:\n\nblock proposal\ntransaction proposal.\n\nThey are send alongside the JSON request body in the Header;\nAuthorization: Bearer aaaaaa.bbbbbb.ccccc\n\nGradecoin uses 3 fields for the JWTs;\n{\n\"tha\": \"Hash of the payload, check invididual references\",\n\"iat\": \"Issued At, Unix Time\",\n\"exp\": \"Expiration Time, epoch\"\n}\n\n\ntha is explained in blocks and transactions documentations.\niat when the JWT was created in Unix Time format\nexp when the JWT will expire &amp; be rejected in Unix Time\n\nAlgorithm\nWe are using RS256, RSASSA-PKCS1-v1_5 using SHA-256. The JWTs you encode with your private RSA key will be decoded using the public key you have authenticated with. You can see how the process works here.\nReferences\n\nRFC, the ultimate reference\nJWT Debugger\n\n","id":"https://gradecoin.xyz/jwt/","title":"JWT"},"https://gradecoin.xyz/register-docs/":{"body":"POST request to /register endpoint\nLets a user to authenticate themselves to the system.\nOnly people who are enrolled to the class can open Gradecoin accounts.\nThis is enforced with your Student ID and a one time password you will receive.\nAuthentication Process\n\nThe bytes you are sending over the network are all Base64 Encoded\n\n\nGradecoin's Public Key (gradecoin_public_key) is listed on our Moodle page. Download and load it it to your client.\nCreate a JSON object (P_AR) with your metu_id (\"e\"+6 chars) and public key in base64 (PEM) format (S_PK) reference\n\n{\n    \"student_id\": \"e123456\",\n    \"passwd\": \"15 char secret\",\n    \"public_key\": \"---BEGIN PUBLIC KEY...\"\n}\n\n\nPick a short temporary key (k_temp)\nPick a random IV (iv).\nEncrypt the serialized string of P_AR with 128 bit block AES in CBC mode with Pkcs7 padding using the temporary key (k_temp), the result is C_AR. Encode this with base64.\nThe temporary key you have picked k_temp is encrypted using RSA with OAEP padding scheme using SHA-256 with gradecoin_public_key, giving us key_ciphertext. Encode this with base64.\nBase64 encode the IV (iv) as well.\nThe payload JSON object (auth_request) can be serialized now:\n\n{\n    \"c\": \"C_AR\",\n    \"iv\": \"iv\",\n    \"key\": \"key_ciphertext\"\n}\n\nIf your authentication process was valid, you will be given access and your public key fingerprint that is your address.\nYou can now sign JWTs to send authorized transaction requests.\n","id":"https://gradecoin.xyz/register-docs/","title":"Register"},"https://gradecoin.xyz/transaction-docs/":{"body":"A transaction request between source and target to move amount Gradecoin.\nRequests\nGET\nA HTTP GET request to /transaction endpoint will return the current list of pending transactions.\nPOST\nA HTTP POST request with Authorization using JWT to /transaction will allow you to propose your own transactions.\nFields\nby: Fingerprint\nsource: Fingerprint\ntarget: Fingerprint\namount: unsigned 16 bit integer\ntimestamp: ISO 8601 &lt;date&gt;T&lt;time&gt;\n","id":"https://gradecoin.xyz/transaction-docs/","title":"Transactions"}},"docInfo":{"https://gradecoin.xyz/":{"body":371,"title":1},"https://gradecoin.xyz/block-docs/":{"body":74,"title":1},"https://gradecoin.xyz/jwt/":{"body":96,"title":1},"https://gradecoin.xyz/register-docs/":{"body":144,"title":1},"https://gradecoin.xyz/transaction-docs/":{"body":44,"title":1}},"length":5},"lang":"English"};
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