From 6bb73e14b6521ea7c2d4f77d2954e4f8744bb736 Mon Sep 17 00:00:00 2001
From: Mario Vavti <mario@mariovavti.com>
Date: Thu, 4 Feb 2021 21:31:37 +0100
Subject: key conversion functions cleanup

---
 include/crypto.php | 146 +++++++----------------------------------------------
 1 file changed, 19 insertions(+), 127 deletions(-)

diff --git a/include/crypto.php b/include/crypto.php
index f86d1153c..66bd113bc 100644
--- a/include/crypto.php
+++ b/include/crypto.php
@@ -3,9 +3,6 @@
 use phpseclib\Crypt\RSA;
 use phpseclib\Math\BigInteger;
 
-require_once('library/ASNValue.class.php');
-require_once('library/asn1.php');
-
 function rsa_sign($data,$key,$alg = 'sha256') {
 	if(! $key)
 		return 'no key';
@@ -311,81 +308,6 @@ function new_keypair($bits) {
 
 }
 
-function DerToPem($Der, $Private=false)
-{
-    //Encode:
-    $Der = base64_encode($Der);
-    //Split lines:
-    $lines = str_split($Der, 65);
-    $body = implode("\n", $lines);
-    //Get title:
-    $title = $Private? 'RSA PRIVATE KEY' : 'PUBLIC KEY';
-    //Add wrapping:
-    $result = "-----BEGIN {$title}-----\n";
-    $result .= $body . "\n";
-    $result .= "-----END {$title}-----\n";
-
-    return $result;
-}
-
-function DerToRsa($Der)
-{
-    //Encode:
-    $Der = base64_encode($Der);
-    //Split lines:
-    $lines = str_split($Der, 64);
-    $body = implode("\n", $lines);
-    //Get title:
-    $title = 'RSA PUBLIC KEY';
-    //Add wrapping:
-    $result = "-----BEGIN {$title}-----\n";
-    $result .= $body . "\n";
-    $result .= "-----END {$title}-----\n";
-
-    return $result;
-}
-
-
-function pkcs8_encode($Modulus,$PublicExponent) {
-	//Encode key sequence
-	$modulus = new ASNValue(ASNValue::TAG_INTEGER);
-	$modulus->SetIntBuffer($Modulus);
-	$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
-	$publicExponent->SetIntBuffer($PublicExponent);
-	$keySequenceItems = array($modulus, $publicExponent);
-	$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$keySequence->SetSequence($keySequenceItems);
-	//Encode bit string
-	$bitStringValue = $keySequence->Encode();
-	$bitStringValue = chr(0x00) . $bitStringValue; //Add unused bits byte
-	$bitString = new ASNValue(ASNValue::TAG_BITSTRING);
-	$bitString->Value = $bitStringValue;
-	//Encode body
-	$bodyValue = "\x30\x0d\x06\x09\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01\x05\x00" . $bitString->Encode();
-	$body = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$body->Value = $bodyValue;
-	//Get DER encoded public key:
-	$PublicDER = $body->Encode();
-	return $PublicDER;
-}
-
-
-function pkcs1_encode($Modulus,$PublicExponent) {
-	//Encode key sequence
-	$modulus = new ASNValue(ASNValue::TAG_INTEGER);
-	$modulus->SetIntBuffer($Modulus);
-	$publicExponent = new ASNValue(ASNValue::TAG_INTEGER);
-	$publicExponent->SetIntBuffer($PublicExponent);
-	$keySequenceItems = array($modulus, $publicExponent);
-	$keySequence = new ASNValue(ASNValue::TAG_SEQUENCE);
-	$keySequence->SetSequence($keySequenceItems);
-	//Encode bit string
-	$bitStringValue = $keySequence->Encode();
-	return $bitStringValue;
-}
-
-
-// http://stackoverflow.com/questions/27568570/how-to-convert-raw-modulus-exponent-to-rsa-public-key-pem-format
 /**
  * @param string $m modulo
  * @param string $e exponent
@@ -400,27 +322,12 @@ function metopem($m, $e) {
 	]);
 	return $rsa->getPublicKey();
 
-/*	$der = pkcs8_encode($m,$e);
-	$key = DerToPem($der,false);
-	return $key;*/
 }
 
-
-function pubrsatome($key,&$m,&$e) {
-	require_once('library/asn1.php');
-
-	$lines = explode("\n",$key);
-	unset($lines[0]);
-	unset($lines[count($lines)]);
-	$x = base64_decode(implode('',$lines));
-
-	$r = ASN_BASE::parseASNString($x);
-
-	$m = base64url_decode($r[0]->asnData[0]->asnData);
-	$e = base64url_decode($r[0]->asnData[1]->asnData);
-}
-
-
+/**
+ * @param string key
+ * @return string
+ */
 function rsatopem($key) {
 
 	$rsa = new RSA();
@@ -428,22 +335,26 @@ function rsatopem($key) {
 
 	return $rsa->getPublicKey(RSA::PUBLIC_FORMAT_PKCS8);
 
-
-/*	pubrsatome($key,$m,$e);
-	return(metopem($m,$e));*/
 }
 
+/**
+ * @param string key
+ * @return string
+ */
 function pemtorsa($key) {
+
 	$rsa = new RSA();
 	$rsa->setPublicKey($key);
 
 	return $rsa->getPublicKey(RSA::PUBLIC_FORMAT_PKCS1);
 
-/*	pemtome($key,$m,$e);
-	return(metorsa($m,$e));*/
-
 }
 
+/**
+ * @param string $key key
+ * @param string $m reference modulo
+ * @param string $e reference exponent
+ */
 function pemtome($key,&$m,&$e) {
 
 	$rsa = new RSA();
@@ -453,27 +364,13 @@ function pemtome($key,&$m,&$e) {
 	$e  = $rsa->modulus->toBytes();
 	$m = $rsa->exponent->toBytes();
 
-
-/*	$rsa = new RSA();
-	$rsa->loadKey($key);
-	$rsa->setPublicKey();
-
-	$modulus  = $rsa->modulus->toBytes();
-	$exponent = $rsa->exponent->toBytes();
-
-
-
-	$lines = explode("\n",$key);
-	unset($lines[0]);
-	unset($lines[count($lines)]);
-	$x = base64_decode(implode('',$lines));
-
-	$r = ASN_BASE::parseASNString($x);
-
-	$m = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[0]->asnData);
-	$e = base64url_decode($r[0]->asnData[1]->asnData[0]->asnData[1]->asnData);*/
 }
 
+/**
+ * @param string $m modulo
+ * @param string $e exponent
+ * @return string
+ */
 function metorsa($m,$e) {
 
 	$rsa = new RSA();
@@ -483,19 +380,14 @@ function metorsa($m,$e) {
 	]);
 	return $rsa->getPublicKey(RSA::PUBLIC_FORMAT_PKCS1);
 
-/*	$der = pkcs1_encode($m,$e);
-	$key = DerToRsa($der);
-	return $key;*/
 }
 
 
-
 function salmon_key($pubkey) {
 	pemtome($pubkey,$m,$e);
 	return 'RSA' . '.' . base64url_encode($m,true) . '.' . base64url_encode($e,true) ;
 }
 
-
 function convert_salmon_key($key) {
 
 	if(strstr($key,','))
-- 
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