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Fixed documentation for cfb and crypto files

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Michal Kolodziej 2013-04-12 13:00:09 +02:00
parent a159f838ad
commit 8545feb03d
13 changed files with 2624 additions and 4993 deletions
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<h1 class="page-title">Source: openpgp.cfb.js</h1>
<section>
<article>
<pre class="prettyprint source"><code>// Modified by Recurity Labs GmbH
// modified version of http://www.hanewin.net/encrypt/PGdecode.js:
/* OpenPGP encryption using RSA/AES
* Copyright 2005-2006 Herbert Hanewinkel, www.haneWIN.de
* version 2.0, check www.haneWIN.de for the latest version
* This software is provided as-is, without express or implied warranty.
* Permission to use, copy, modify, distribute or sell this software, with or
* without fee, for any purpose and by any individual or organization, is hereby
* granted, provided that the above copyright notice and this paragraph appear
* in all copies. Distribution as a part of an application or binary must
* include the above copyright notice in the documentation and/or other
* materials provided with the application or distribution.
*/
/**
* An array of bytes, that is integers with values from 0 to 255
* @typedef {(Array|Uint8Array)} openpgp_byte_array
*/
/**
* Block cipher function
* @callback openpgp_cipher_block_fn
* @param {openpgp_byte_array} block A block to perform operations on
* @param {openpgp_byte_array} key to use in encryption/decryption
* @return {openpgp_byte_array} Encrypted/decrypted block
*/
// --------------------------------------
/**
* This function encrypts a given with the specified prefixrandom
* using the specified blockcipher to encrypt a message
* @param {String[]} prefixrandom random bytes of block_size length provided
* as a string to be used in prefixing the data
* @param {openpgp_cipher_block_fn} blockcipherfn the algorithm encrypt function to encrypt
* data in one block_size encryption.
* @param {Integer} block_size the block size in bytes of the algorithm used
* @param {String} plaintext data to be encrypted provided as a string
* @param {openpgp_byte_array} key key to be used to encrypt the data. This will be passed to the
* blockcipherfn
* @param {Boolean} resync a boolean value specifying if a resync of the
* IV should be used or not. The encrypteddatapacket uses the
* "old" style with a resync. Encryption within an
* encryptedintegrityprotecteddata packet is not resyncing the IV.
* @return {String} a string with the encrypted data
*/
function openpgp_cfb_encrypt(prefixrandom, blockcipherencryptfn, plaintext, block_size, key, resync) {
var FR = new Array(block_size);
var FRE = new Array(block_size);
prefixrandom = prefixrandom + prefixrandom.charAt(block_size-2) +prefixrandom.charAt(block_size-1);
util.print_debug("prefixrandom:"+util.hexstrdump(prefixrandom));
var ciphertext = "";
// 1. The feedback register (FR) is set to the IV, which is all zeros.
for (var i = 0; i &lt; block_size; i++) FR[i] = 0;
// 2. FR is encrypted to produce FRE (FR Encrypted). This is the
// encryption of an all-zero value.
FRE = blockcipherencryptfn(FR, key);
// 3. FRE is xored with the first BS octets of random data prefixed to
// the plaintext to produce C[1] through C[BS], the first BS octets
// of ciphertext.
for (var i = 0; i &lt; block_size; i++) ciphertext += String.fromCharCode(FRE[i] ^ prefixrandom.charCodeAt(i));
// 4. FR is loaded with C[1] through C[BS].
for (var i = 0; i &lt; block_size; i++) FR[i] = ciphertext.charCodeAt(i);
// 5. FR is encrypted to produce FRE, the encryption of the first BS
// octets of ciphertext.
FRE = blockcipherencryptfn(FR, key);
// 6. The left two octets of FRE get xored with the next two octets of
// data that were prefixed to the plaintext. This produces C[BS+1]
// and C[BS+2], the next two octets of ciphertext.
ciphertext += String.fromCharCode(FRE[0] ^ prefixrandom.charCodeAt(block_size));
ciphertext += String.fromCharCode(FRE[1] ^ prefixrandom.charCodeAt(block_size+1));
if (resync) {
// 7. (The resync step) FR is loaded with C3-C10.
for (var i = 0; i &lt; block_size; i++) FR[i] = ciphertext.charCodeAt(i+2);
} else {
for (var i = 0; i &lt; block_size; i++) FR[i] = ciphertext.charCodeAt(i);
}
// 8. FR is encrypted to produce FRE.
FRE = blockcipherencryptfn(FR, key);
if (resync) {
// 9. FRE is xored with the first 8 octets of the given plaintext, now
// that we have finished encrypting the 10 octets of prefixed data.
// This produces C11-C18, the next 8 octets of ciphertext.
for (var i = 0; i &lt; block_size; i++)
ciphertext += String.fromCharCode(FRE[i] ^ plaintext.charCodeAt(i));
for(n=block_size+2; n &lt; plaintext.length; n+=block_size) {
// 10. FR is loaded with C11-C18
for (var i = 0; i &lt; block_size; i++) FR[i] = ciphertext.charCodeAt(n+i);
// 11. FR is encrypted to produce FRE.
FRE = blockcipherencryptfn(FR, key);
// 12. FRE is xored with the next 8 octets of plaintext, to produce the
// next 8 octets of ciphertext. These are loaded into FR and the
// process is repeated until the plaintext is used up.
for (var i = 0; i &lt; block_size; i++) ciphertext += String.fromCharCode(FRE[i] ^ plaintext.charCodeAt((n-2)+i));
}
}
else {
plaintext = " "+plaintext;
// 9. FRE is xored with the first 8 octets of the given plaintext, now
// that we have finished encrypting the 10 octets of prefixed data.
// This produces C11-C18, the next 8 octets of ciphertext.
for (var i = 2; i &lt; block_size; i++) ciphertext += String.fromCharCode(FRE[i] ^ plaintext.charCodeAt(i));
var tempCiphertext = ciphertext.substring(0,2*block_size).split('');
var tempCiphertextString = ciphertext.substring(block_size);
for(n=block_size; n&lt;plaintext.length; n+=block_size) {
// 10. FR is loaded with C11-C18
for (var i = 0; i &lt; block_size; i++) FR[i] = tempCiphertextString.charCodeAt(i);
tempCiphertextString='';
// 11. FR is encrypted to produce FRE.
FRE = blockcipherencryptfn(FR, key);
// 12. FRE is xored with the next 8 octets of plaintext, to produce the
// next 8 octets of ciphertext. These are loaded into FR and the
// process is repeated until the plaintext is used up.
for (var i = 0; i &lt; block_size; i++){ tempCiphertext.push(String.fromCharCode(FRE[i] ^ plaintext.charCodeAt(n+i)));
tempCiphertextString += String.fromCharCode(FRE[i] ^ plaintext.charCodeAt(n+i));
}
}
ciphertext = tempCiphertext.join('');
}
return ciphertext;
}
/**
* Decrypts the prefixed data for the Modification Detection Code (MDC) computation
* @param {openpgp_block_cipher_fn} blockcipherencryptfn Cipher function to use
* @param {Integer} block_size Blocksize of the algorithm
* @param {openpgp_byte_array} key The key for encryption
* @param {String} ciphertext The encrypted data
* @return {String} plaintext Data of D(ciphertext) with blocksize length +2
*/
function openpgp_cfb_mdc(blockcipherencryptfn, block_size, key, ciphertext) {
var iblock = new Array(block_size);
var ablock = new Array(block_size);
var i;
// initialisation vector
for(i=0; i &lt; block_size; i++) iblock[i] = 0;
iblock = blockcipherencryptfn(iblock, key);
for(i = 0; i &lt; block_size; i++)
{
ablock[i] = ciphertext.charCodeAt(i);
iblock[i] ^= ablock[i];
}
ablock = blockcipherencryptfn(ablock, key);
return util.bin2str(iblock)+
String.fromCharCode(ablock[0]^ciphertext.charCodeAt(block_size))+
String.fromCharCode(ablock[1]^ciphertext.charCodeAt(block_size+1));
}
/**
* This function decrypts a given plaintext using the specified
* blockcipher to decrypt a message
* @param {openpgp_cipher_block_fn} blockcipherfn The algorithm _encrypt_ function to encrypt
* data in one block_size encryption.
* @param {Integer} block_size the block size in bytes of the algorithm used
* @param {String} plaintext ciphertext to be decrypted provided as a string
* @param {openpgp_byte_array} key key to be used to decrypt the ciphertext. This will be passed to the
* blockcipherfn
* @param {Boolean} resync a boolean value specifying if a resync of the
* IV should be used or not. The encrypteddatapacket uses the
* "old" style with a resync. Decryption within an
* encryptedintegrityprotecteddata packet is not resyncing the IV.
* @return {String} a string with the plaintext data
*/
function openpgp_cfb_decrypt(blockcipherencryptfn, block_size, key, ciphertext, resync)
{
util.print_debug("resync:"+resync);
var iblock = new Array(block_size);
var ablock = new Array(block_size);
var i, n = '';
var text = [];
// initialisation vector
for(i=0; i &lt; block_size; i++) iblock[i] = 0;
iblock = blockcipherencryptfn(iblock, key);
for(i = 0; i &lt; block_size; i++)
{
ablock[i] = ciphertext.charCodeAt(i);
iblock[i] ^= ablock[i];
}
ablock = blockcipherencryptfn(ablock, key);
util.print_debug("openpgp_cfb_decrypt:\niblock:"+util.hexidump(iblock)+"\nablock:"+util.hexidump(ablock)+"\n");
util.print_debug((ablock[0]^ciphertext.charCodeAt(block_size)).toString(16)+(ablock[1]^ciphertext.charCodeAt(block_size+1)).toString(16));
// test check octets
if(iblock[block_size-2]!=(ablock[0]^ciphertext.charCodeAt(block_size))
|| iblock[block_size-1]!=(ablock[1]^ciphertext.charCodeAt(block_size+1)))
{
util.print_eror("error duding decryption. Symmectric encrypted data not valid.");
return text.join('');
}
/* RFC4880: Tag 18 and Resync:
* [...] Unlike the Symmetrically Encrypted Data Packet, no
* special CFB resynchronization is done after encrypting this prefix
* data. See "OpenPGP CFB Mode" below for more details.
*/
if (resync) {
for(i=0; i&lt;block_size; i++) iblock[i] = ciphertext.charCodeAt(i+2);
for(n=block_size+2; n&lt;ciphertext.length; n+=block_size)
{
ablock = blockcipherencryptfn(iblock, key);
for(i = 0; i&lt;block_size && i+n &lt; ciphertext.length; i++)
{
iblock[i] = ciphertext.charCodeAt(n+i);
text.push(String.fromCharCode(ablock[i]^iblock[i]));
}
}
} else {
for(i=0; i&lt;block_size; i++) iblock[i] = ciphertext.charCodeAt(i);
for(n=block_size; n&lt;ciphertext.length; n+=block_size)
{
ablock = blockcipherencryptfn(iblock, key);
for(i = 0; i&lt;block_size && i+n &lt; ciphertext.length; i++)
{
iblock[i] = ciphertext.charCodeAt(n+i);
text.push(String.fromCharCode(ablock[i]^iblock[i]));
}
}
}
return text.join('');
}
function normal_cfb_encrypt(blockcipherencryptfn, block_size, key, plaintext, iv) {
var blocki ="";
var blockc = "";
var pos = 0;
var cyphertext = [];
var tempBlock = [];
blockc = iv.substring(0,block_size);
while (plaintext.length > block_size*pos) {
var encblock = blockcipherencryptfn(blockc, key);
blocki = plaintext.substring((pos*block_size),(pos*block_size)+block_size);
for (var i=0; i &lt; blocki.length; i++)
tempBlock.push(String.fromCharCode(blocki.charCodeAt(i) ^ encblock[i]));
blockc = tempBlock.join('');
tempBlock = [];
cyphertext.push(blockc);
pos++;
}
return cyphertext.join('');
}
function normal_cfb_decrypt(blockcipherencryptfn, block_size, key, ciphertext, iv) {
var blockp ="";
var pos = 0;
var plaintext = [];
var offset = 0;
if (iv == null)
for (var i = 0; i &lt; block_size; i++) blockp += String.fromCharCode(0);
else
blockp = iv.substring(0,block_size);
while (ciphertext.length > (block_size*pos)) {
var decblock = blockcipherencryptfn(blockp, key);
blockp = ciphertext.substring((pos*(block_size))+offset,(pos*(block_size))+(block_size)+offset);
for (var i=0; i &lt; blockp.length; i++) {
plaintext.push(String.fromCharCode(blockp.charCodeAt(i) ^ decblock[i]));
}
pos++;
}
return plaintext.join('');
}
</code></pre>
</article>
</section>
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<h1 class="page-title">Source: openpgp.crypto.js</h1>
<section>
<article>
<pre class="prettyprint source"><code>// GPG4Browsers - An OpenPGP implementation in javascript
// Copyright (C) 2011 Recurity Labs GmbH
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
// The GPG4Browsers crypto interface
/**
* Encrypts data using the specified public key multiprecision integers
* and the specified algorithm.
* @param {Integer} algo Algorithm to be used (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Algorithm dependent multiprecision integers
* @param {openpgp_type_mpi} data Data to be encrypted as MPI
* @return {(openpgp_type_mpi|openpgp_type_mpi[])} if RSA an openpgp_type_mpi;
* if elgamal encryption an array of two openpgp_type_mpi is returned; otherwise null
*/
function openpgp_crypto_asymetricEncrypt(algo, publicMPIs, data) {
switch(algo) {
case 1: // RSA (Encrypt or Sign) [HAC]
case 2: // RSA Encrypt-Only [HAC]
case 3: // RSA Sign-Only [HAC]
var rsa = new RSA();
var n = publicMPIs[0].toBigInteger();
var e = publicMPIs[1].toBigInteger();
var m = data.toBigInteger();
return rsa.encrypt(m,e,n).toMPI();
case 16: // Elgamal (Encrypt-Only) [ELGAMAL] [HAC]
var elgamal = new Elgamal();
var p = publicMPIs[0].toBigInteger();
var g = publicMPIs[1].toBigInteger();
var y = publicMPIs[2].toBigInteger();
var m = data.toBigInteger();
return elgamal.encrypt(m,g,p,y);
default:
return null;
}
}
/**
* Decrypts data using the specified public key multiprecision integers of the private key,
* the specified secretMPIs of the private key and the specified algorithm.
* @param {Integer} algo Algorithm to be used (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Algorithm dependent multiprecision integers
* of the public key part of the private key
* @param {openpgp_type_mpi[]} secretMPIs Algorithm dependent multiprecision integers
* of the private key used
* @param {openpgp_type_mpi} data Data to be encrypted as MPI
* @return {BigInteger} returns a big integer containing the decrypted data; otherwise null
*/
function openpgp_crypto_asymetricDecrypt(algo, publicMPIs, secretMPIs, dataMPIs) {
switch(algo) {
case 1: // RSA (Encrypt or Sign) [HAC]
case 2: // RSA Encrypt-Only [HAC]
case 3: // RSA Sign-Only [HAC]
var rsa = new RSA();
var d = secretMPIs[0].toBigInteger();
var p = secretMPIs[1].toBigInteger();
var q = secretMPIs[2].toBigInteger();
var u = secretMPIs[3].toBigInteger();
var m = dataMPIs[0].toBigInteger();
return rsa.decrypt(m, d, p, q, u);
case 16: // Elgamal (Encrypt-Only) [ELGAMAL] [HAC]
var elgamal = new Elgamal();
var x = secretMPIs[0].toBigInteger();
var c1 = dataMPIs[0].toBigInteger();
var c2 = dataMPIs[1].toBigInteger();
var p = publicMPIs[0].toBigInteger();
return elgamal.decrypt(c1,c2,p,x);
default:
return null;
}
}
/**
* generate random byte prefix as string for the specified algorithm
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @return {String} Random bytes with length equal to the block
* size of the cipher
*/
function openpgp_crypto_getPrefixRandom(algo) {
switch(algo) {
case 2:
case 3:
case 4:
return openpgp_crypto_getRandomBytes(8);
case 7:
case 8:
case 9:
case 10:
return openpgp_crypto_getRandomBytes(16);
default:
return null;
}
}
/**
* retrieve the MDC prefixed bytes by decrypting them
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @param {String} key Key as string. length is depending on the algorithm used
* @param {String} data Encrypted data where the prefix is decrypted from
* @return {String} Plain text data of the prefixed data
*/
function openpgp_crypto_MDCSystemBytes(algo, key, data) {
util.print_debug_hexstr_dump("openpgp_crypto_symmetricDecrypt:\nencrypteddata:",data);
switch(algo) {
case 0: // Plaintext or unencrypted data
return data;
case 2: // TripleDES (DES-EDE, [SCHNEIER] [HAC] - 168 bit key derived from 192)
return openpgp_cfb_mdc(desede, 8, key, data, openpgp_cfb);
case 3: // CAST5 (128 bit key, as per [RFC2144])
return openpgp_cfb_mdc(cast5_encrypt, 8, key, data);
case 4: // Blowfish (128 bit key, 16 rounds) [BLOWFISH]
return openpgp_cfb_mdc(BFencrypt, 8, key, data);
case 7: // AES with 128-bit key [AES]
case 8: // AES with 192-bit key
case 9: // AES with 256-bit key
return openpgp_cfb_mdc(AESencrypt, 16, keyExpansion(key), data);
case 10:
return openpgp_cfb_mdc(TFencrypt, 16, key, data);
case 1: // IDEA [IDEA]
util.print_error(""+ (algo == 1 ? "IDEA Algorithm not implemented" : "Twofish Algorithm not implemented"));
return null;
default:
}
return null;
}
/**
* Generating a session key for the specified symmetric algorithm
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @return {String} Random bytes as a string to be used as a key
*/
function openpgp_crypto_generateSessionKey(algo) {
switch (algo) {
case 2: // TripleDES (DES-EDE, [SCHNEIER] [HAC] - 168 bit key derived from 192)
case 8: // AES with 192-bit key
return openpgp_crypto_getRandomBytes(24);
case 3: // CAST5 (128 bit key, as per [RFC2144])
case 4: // Blowfish (128 bit key, 16 rounds) [BLOWFISH]
case 7: // AES with 128-bit key [AES]
util.print_debug("length = 16:\n"+util.hexstrdump(openpgp_crypto_getRandomBytes(16)));
return openpgp_crypto_getRandomBytes(16);
case 9: // AES with 256-bit key
case 10:// Twofish with 256-bit key [TWOFISH]
return openpgp_crypto_getRandomBytes(32);
}
return null;
}
/**
*
* @param {Integer} algo public Key algorithm
* @param {Integer} hash_algo Hash algorithm
* @param {openpgp_type_mpi[]} msg_MPIs Signature multiprecision integers
* @param {openpgp_type_mpi[]} publickey_MPIs Public key multiprecision integers
* @param {String} data Data on where the signature was computed on.
* @return {Boolean} true if signature (sig_data was equal to data over hash)
*/
function openpgp_crypto_verifySignature(algo, hash_algo, msg_MPIs, publickey_MPIs, data) {
var calc_hash = openpgp_crypto_hashData(hash_algo, data);
switch(algo) {
case 1: // RSA (Encrypt or Sign) [HAC]
case 2: // RSA Encrypt-Only [HAC]
case 3: // RSA Sign-Only [HAC]
var rsa = new RSA();
var n = publickey_MPIs[0].toBigInteger();
var e = publickey_MPIs[1].toBigInteger();
var x = msg_MPIs[0].toBigInteger();
var dopublic = rsa.verify(x,e,n);
var hash = openpgp_encoding_emsa_pkcs1_decode(hash_algo,dopublic.toMPI().substring(2));
if (hash == -1) {
util.print_error("PKCS1 padding in message or key incorrect. Aborting...");
return false;
}
return hash == calc_hash;
case 16: // Elgamal (Encrypt-Only) [ELGAMAL] [HAC]
util.print_error("signing with Elgamal is not defined in the OpenPGP standard.");
return null;
case 17: // DSA (Digital Signature Algorithm) [FIPS186] [HAC]
var dsa = new DSA();
var s1 = msg_MPIs[0].toBigInteger();
var s2 = msg_MPIs[1].toBigInteger();
var p = publickey_MPIs[0].toBigInteger();
var q = publickey_MPIs[1].toBigInteger();
var g = publickey_MPIs[2].toBigInteger();
var y = publickey_MPIs[3].toBigInteger();
var m = data;
var dopublic = dsa.verify(hash_algo,s1,s2,m,p,q,g,y);
return dopublic.compareTo(s1) == 0;
default:
return null;
}
}
/**
* Create a signature on data using the specified algorithm
* @param {Integer} hash_algo hash Algorithm to use (See RFC4880 9.4)
* @param {Integer} algo Asymmetric cipher algorithm to use (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Public key multiprecision integers
* of the private key
* @param {openpgp_type_mpi[]} secretMPIs Private key multiprecision
* integers which is used to sign the data
* @param {String} data Data to be signed
* @return {(String|openpgp_type_mpi)}
*/
function openpgp_crypto_signData(hash_algo, algo, publicMPIs, secretMPIs, data) {
switch(algo) {
case 1: // RSA (Encrypt or Sign) [HAC]
case 2: // RSA Encrypt-Only [HAC]
case 3: // RSA Sign-Only [HAC]
var rsa = new RSA();
var d = secretMPIs[0].toBigInteger();
var n = publicMPIs[0].toBigInteger();
var m = openpgp_encoding_emsa_pkcs1_encode(hash_algo, data,publicMPIs[0].mpiByteLength);
util.print_debug("signing using RSA");
return rsa.sign(m, d, n).toMPI();
case 17: // DSA (Digital Signature Algorithm) [FIPS186] [HAC]
var dsa = new DSA();
util.print_debug("DSA Sign: q size in Bytes:"+publicMPIs[1].getByteLength());
var p = publicMPIs[0].toBigInteger();
var q = publicMPIs[1].toBigInteger();
var g = publicMPIs[2].toBigInteger();
var y = publicMPIs[3].toBigInteger();
var x = secretMPIs[0].toBigInteger();
var m = data;
var result = dsa.sign(hash_algo,m, g, p, q, x);
util.print_debug("signing using DSA\n result:"+util.hexstrdump(result[0])+"|"+util.hexstrdump(result[1]));
return result[0]+result[1];
case 16: // Elgamal (Encrypt-Only) [ELGAMAL] [HAC]
util.print_debug("signing with Elgamal is not defined in the OpenPGP standard.");
return null;
default:
return null;
}
}
/**
* Create a hash on the specified data using the specified algorithm
* @param {Integer} algo Hash algorithm type (see RFC4880 9.4)
* @param {String} data Data to be hashed
* @return {String} hash value
*/
function openpgp_crypto_hashData(algo, data) {
var hash = null;
switch(algo) {
case 1: // - MD5 [HAC]
hash = MD5(data);
break;
case 2: // - SHA-1 [FIPS180]
hash = str_sha1(data);
break;
case 3: // - RIPE-MD/160 [HAC]
hash = RMDstring(data);
break;
case 8: // - SHA256 [FIPS180]
hash = str_sha256(data);
break;
case 9: // - SHA384 [FIPS180]
hash = str_sha384(data);
break;
case 10:// - SHA512 [FIPS180]
hash = str_sha512(data);
break;
case 11:// - SHA224 [FIPS180]
hash = str_sha224(data);
default:
break;
}
return hash;
}
/**
* Returns the hash size in bytes of the specified hash algorithm type
* @param {Integer} algo Hash algorithm type (See RFC4880 9.4)
* @return {Integer} Size in bytes of the resulting hash
*/
function openpgp_crypto_getHashByteLength(algo) {
var hash = null;
switch(algo) {
case 1: // - MD5 [HAC]
return 16;
case 2: // - SHA-1 [FIPS180]
case 3: // - RIPE-MD/160 [HAC]
return 20;
case 8: // - SHA256 [FIPS180]
return 32;
case 9: // - SHA384 [FIPS180]
return 48
case 10:// - SHA512 [FIPS180]
return 64;
case 11:// - SHA224 [FIPS180]
return 28;
}
return null;
}
/**
* Retrieve secure random byte string of the specified length
* @param {Integer} length Length in bytes to generate
* @return {String} Random byte string
*/
function openpgp_crypto_getRandomBytes(length) {
var result = '';
for (var i = 0; i &lt; length; i++) {
result += String.fromCharCode(openpgp_crypto_getSecureRandomOctet());
}
return result;
}
/**
* Return a pseudo-random number in the specified range
* @param {Integer} from Min of the random number
* @param {Integer} to Max of the random number (max 32bit)
* @return {Integer} A pseudo random number
*/
function openpgp_crypto_getPseudoRandom(from, to) {
return Math.round(Math.random()*(to-from))+from;
}
/**
* Return a secure random number in the specified range
* @param {Integer} from Min of the random number
* @param {Integer} to Max of the random number (max 32bit)
* @return {Integer} A secure random number
*/
function openpgp_crypto_getSecureRandom(from, to) {
var buf = new Uint32Array(1);
window.crypto.getRandomValues(buf);
var bits = ((to-from)).toString(2).length;
while ((buf[0] & (Math.pow(2, bits) -1)) > (to-from))
window.crypto.getRandomValues(buf);
return from+(Math.abs(buf[0] & (Math.pow(2, bits) -1)));
}
function openpgp_crypto_getSecureRandomOctet() {
var buf = new Uint32Array(1);
window.crypto.getRandomValues(buf);
return buf[0] & 0xFF;
}
/**
* Create a secure random big integer of bits length
* @param {Integer} bits Bit length of the MPI to create
* @return {BigInteger} Resulting big integer
*/
function openpgp_crypto_getRandomBigInteger(bits) {
if (bits &lt; 0)
return null;
var numBytes = Math.floor((bits+7)/8);
var randomBits = openpgp_crypto_getRandomBytes(numBytes);
if (bits % 8 > 0) {
randomBits = String.fromCharCode(
(Math.pow(2,bits % 8)-1) &
randomBits.charCodeAt(0)) +
randomBits.substring(1);
}
return new openpgp_type_mpi().create(randomBits).toBigInteger();
}
function openpgp_crypto_getRandomBigIntegerInRange(min, max) {
if (max.compareTo(min) &lt;= 0)
return;
var range = max.subtract(min);
var r = openpgp_crypto_getRandomBigInteger(range.bitLength());
while (r > range) {
r = openpgp_crypto_getRandomBigInteger(range.bitLength());
}
return min.add(r);
}
//This is a test method to ensure that encryption/decryption with a given 1024bit RSAKey object functions as intended
function openpgp_crypto_testRSA(key){
debugger;
var rsa = new RSA();
var mpi = new openpgp_type_mpi();
mpi.create(openpgp_encoding_eme_pkcs1_encode('ABABABAB', 128));
var msg = rsa.encrypt(mpi.toBigInteger(),key.ee,key.n);
var result = rsa.decrypt(msg, key.d, key.p, key.q, key.u);
}
/**
* @typedef {Object} openpgp_keypair
* @property {openpgp_packet_keymaterial} privateKey
* @property {openpgp_packet_keymaterial} publicKey
*/
/**
* Calls the necessary crypto functions to generate a keypair.
* Called directly by openpgp.js
* @param {Integer} keyType Follows OpenPGP algorithm convention.
* @param {Integer} numBits Number of bits to make the key to be generated
* @return {openpgp_keypair}
*/
function openpgp_crypto_generateKeyPair(keyType, numBits, passphrase, s2kHash, symmetricEncryptionAlgorithm){
var privKeyPacket;
var publicKeyPacket;
var d = new Date();
d = d.getTime()/1000;
var timePacket = String.fromCharCode(Math.floor(d/0x1000000%0x100)) + String.fromCharCode(Math.floor(d/0x10000%0x100)) + String.fromCharCode(Math.floor(d/0x100%0x100)) + String.fromCharCode(Math.floor(d%0x100));
switch(keyType){
case 1:
var rsa = new RSA();
var key = rsa.generate(numBits,"10001");
privKeyPacket = new openpgp_packet_keymaterial().write_private_key(keyType, key, passphrase, s2kHash, symmetricEncryptionAlgorithm, timePacket);
publicKeyPacket = new openpgp_packet_keymaterial().write_public_key(keyType, key, timePacket);
break;
default:
util.print_error("Unknown keytype "+keyType)
}
return {privateKey: privKeyPacket, publicKey: publicKeyPacket};
}
</code></pre>
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9
doc/styles/jsdoc-default.css
View File

@ -216,13 +216,18 @@ h6
margin: 0;
}
.sh_sourceCode
.prettyprint
{
border: 1px solid #ddd;
width: 80%;
overflow: auto;
}
.sh_sourceCode code
.prettyprint.source {
width: inherit;
}
.prettyprint code
{
font-family: Consolas, 'Lucida Console', Monaco, monospace;
font-size: 100%;

111
doc/styles/prettify-jsdoc.css Normal file
View File

@ -0,0 +1,111 @@
/* JSDoc prettify.js theme */
/* plain text */
.pln {
color: #000000;
font-weight: normal;
font-style: normal;
}
/* string content */
.str {
color: #006400;
font-weight: normal;
font-style: normal;
}
/* a keyword */
.kwd {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* a comment */
.com {
font-weight: normal;
font-style: italic;
}
/* a type name */
.typ {
color: #000000;
font-weight: normal;
font-style: normal;
}
/* a literal value */
.lit {
color: #006400;
font-weight: normal;
font-style: normal;
}
/* punctuation */
.pun {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* lisp open bracket */
.opn {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* lisp close bracket */
.clo {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* a markup tag name */
.tag {
color: #006400;
font-weight: normal;
font-style: normal;
}
/* a markup attribute name */
.atn {
color: #006400;
font-weight: normal;
font-style: normal;
}
/* a markup attribute value */
.atv {
color: #006400;
font-weight: normal;
font-style: normal;
}
/* a declaration */
.dec {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* a variable name */
.var {
color: #000000;
font-weight: normal;
font-style: normal;
}
/* a function name */
.fun {
color: #000000;
font-weight: bold;
font-style: normal;
}
/* Specify class=linenums on a pre to get line numbering */
ol.linenums {
margin-top: 0;
margin-bottom: 0;
}

132
doc/styles/prettify-tomorrow.css Normal file
View File

@ -0,0 +1,132 @@
/* Tomorrow Theme */
/* Original theme - https://github.com/chriskempson/tomorrow-theme */
/* Pretty printing styles. Used with prettify.js. */
/* SPAN elements with the classes below are added by prettyprint. */
/* plain text */
.pln {
color: #4d4d4c; }
@media screen {
/* string content */
.str {
color: #718c00; }
/* a keyword */
.kwd {
color: #8959a8; }
/* a comment */
.com {
color: #8e908c; }
/* a type name */
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color: #4271ae; }
/* a literal value */
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color: #f5871f; }
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color: #4d4d4c; }
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.opn {
color: #4d4d4c; }
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.clo {
color: #4d4d4c; }
/* a markup tag name */
.tag {
color: #c82829; }
/* a markup attribute name */
.atn {
color: #f5871f; }
/* a markup attribute value */
.atv {
color: #3e999f; }
/* a declaration */
.dec {
color: #f5871f; }
/* a variable name */
.var {
color: #c82829; }
/* a function name */
.fun {
color: #4271ae; } }
/* Use higher contrast and text-weight for printable form. */
@media print, projection {
.str {
color: #060; }
.kwd {
color: #006;
font-weight: bold; }
.com {
color: #600;
font-style: italic; }
.typ {
color: #404;
font-weight: bold; }
.lit {
color: #044; }
.pun, .opn, .clo {
color: #440; }
.tag {
color: #006;
font-weight: bold; }
.atn {
color: #404; }
.atv {
color: #060; } }
/* Style */
/*
pre.prettyprint {
background: white;
font-family: Menlo, Monaco, Consolas, monospace;
font-size: 12px;
line-height: 1.5;
border: 1px solid #ccc;
padding: 10px; }
*/
/* Specify class=linenums on a pre to get line numbering */
ol.linenums {
margin-top: 0;
margin-bottom: 0; }
/* IE indents via margin-left */
li.L0,
li.L1,
li.L2,
li.L3,
li.L4,
li.L5,
li.L6,
li.L7,
li.L8,
li.L9 {
/* */ }
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li.L1,
li.L3,
li.L5,
li.L7,
li.L9 {
/* */ }

64
src/ciphers/openpgp.cfb.js
View File

@ -15,27 +15,37 @@
* materials provided with the application or distribution.
*/
/**
* An array of bytes, that is integers with values from 0 to 255
* @typedef {(Array|Uint8Array)} openpgp_byte_array
*/
/**
* Block cipher function
* @callback openpgp_cipher_block_fn
* @param {openpgp_byte_array} block A block to perform operations on
* @param {openpgp_byte_array} key to use in encryption/decryption
* @return {openpgp_byte_array} Encrypted/decrypted block
*/
// --------------------------------------
/**
* This function encrypts a given with the specified prefixrandom
* using the specified blockcipher to encrypt a message
* @param prefixrandom random bytes of block_size length provided
* @param {String} prefixrandom random bytes of block_size length provided
* as a string to be used in prefixing the data
* @param blockcipherfn the algorithm encrypt function to encrypt
* data in one block_size encryption. The function must be
* specified as blockcipherfn([integer_array(integers 0..255)]
* block,[integer_array(integers 0..255)] key) returning an
* array of bytes (integers 0..255)
* @param block_size the block size in bytes of the algorithm used
* @param plaintext data to be encrypted provided as a string
* @param key key to be used to encrypt the data as
* integer_array(integers 0..255)]. This will be passed to the
* @param {openpgp_cipher_block_fn} blockcipherfn the algorithm encrypt function to encrypt
* data in one block_size encryption.
* @param {Integer} block_size the block size in bytes of the algorithm used
* @param {String} plaintext data to be encrypted provided as a string
* @param {openpgp_byte_array} key key to be used to encrypt the data. This will be passed to the
* blockcipherfn
* @param resync a boolean value specifying if a resync of the
* @param {Boolean} resync a boolean value specifying if a resync of the
* IV should be used or not. The encrypteddatapacket uses the
* "old" style with a resync. Encryption within an
* encryptedintegrityprotecteddata packet is not resyncing the IV.
* @return a string with the encrypted data
* @return {String} a string with the encrypted data
*/
function openpgp_cfb_encrypt(prefixrandom, blockcipherencryptfn, plaintext, block_size, key, resync) {
var FR = new Array(block_size);
@ -126,12 +136,12 @@ function openpgp_cfb_encrypt(prefixrandom, blockcipherencryptfn, plaintext, bloc
}
/**
* decrypts the prefixed data for the Modification Detection Code (MDC) computation
* @param blockcipherencryptfn cipher function to use
* @param block_size blocksize of the algorithm
* @param key the key for encryption
* @param ciphertext the encrypted data
* @return plaintext data of D(ciphertext) with blocksize length +2
* Decrypts the prefixed data for the Modification Detection Code (MDC) computation
* @param {openpgp_block_cipher_fn} blockcipherencryptfn Cipher function to use
* @param {Integer} block_size Blocksize of the algorithm
* @param {openpgp_byte_array} key The key for encryption
* @param {String} ciphertext The encrypted data
* @return {String} plaintext Data of D(ciphertext) with blocksize length +2
*/
function openpgp_cfb_mdc(blockcipherencryptfn, block_size, key, ciphertext) {
var iblock = new Array(block_size);
@ -157,21 +167,17 @@ function openpgp_cfb_mdc(blockcipherencryptfn, block_size, key, ciphertext) {
/**
* This function decrypts a given plaintext using the specified
* blockcipher to decrypt a message
* @param blockcipherfn the algorithm _encrypt_ function to encrypt
* data in one block_size encryption. The function must be
* specified as blockcipherfn([integer_array(integers 0..255)]
* block,[integer_array(integers 0..255)] key) returning an
* array of bytes (integers 0..255)
* @param block_size the block size in bytes of the algorithm used
* @param plaintext ciphertext to be decrypted provided as a string
* @param key key to be used to decrypt the ciphertext as
* integer_array(integers 0..255)]. This will be passed to the
* @param {openpgp_cipher_block_fn} blockcipherfn The algorithm _encrypt_ function to encrypt
* data in one block_size encryption.
* @param {Integer} block_size the block size in bytes of the algorithm used
* @param {String} plaintext ciphertext to be decrypted provided as a string
* @param {openpgp_byte_array} key key to be used to decrypt the ciphertext. This will be passed to the
* blockcipherfn
* @param resync a boolean value specifying if a resync of the
* @param {Boolean} resync a boolean value specifying if a resync of the
* IV should be used or not. The encrypteddatapacket uses the
* "old" style with a resync. Decryption within an
* encryptedintegrityprotecteddata packet is not resyncing the IV.
* @return a string with the plaintext data
* @return {String} a string with the plaintext data
*/
function openpgp_cfb_decrypt(blockcipherencryptfn, block_size, key, ciphertext, resync)

122
src/ciphers/openpgp.crypto.js
View File

@ -20,11 +20,11 @@
/**
* Encrypts data using the specified public key multiprecision integers
* and the specified algorithm.
* @param algo [Integer] Algorithm to be used (See RFC4880 9.1)
* @param publicMPIs [Array[openpgp_type_mpi]] algorithm dependent multiprecision integers
* @param data [openpgp_type_mpi] data to be encrypted as MPI
* @return [Object] if RSA an openpgp_type_mpi; if elgamal encryption an array of two
* openpgp_type_mpi is returned; otherwise null
* @param {Integer} algo Algorithm to be used (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Algorithm dependent multiprecision integers
* @param {openpgp_type_mpi} data Data to be encrypted as MPI
* @return {(openpgp_type_mpi|openpgp_type_mpi[])} if RSA an openpgp_type_mpi;
* if elgamal encryption an array of two openpgp_type_mpi is returned; otherwise null
*/
function openpgp_crypto_asymetricEncrypt(algo, publicMPIs, data) {
switch(algo) {
@ -51,11 +51,13 @@ function openpgp_crypto_asymetricEncrypt(algo, publicMPIs, data) {
/**
* Decrypts data using the specified public key multiprecision integers of the private key,
* the specified secretMPIs of the private key and the specified algorithm.
* @param algo [Integer] Algorithm to be used (See RFC4880 9.1)
* @param publicMPIs [Array[openpgp_type_mpi]] algorithm dependent multiprecision integers of the public key part of the private key
* @param secretMPIs [Array[openpgp_type_mpi]] algorithm dependent multiprecision integers of the private key used
* @param data [openpgp_type_mpi] data to be encrypted as MPI
* @return [BigInteger] returns a big integer containing the decrypted data; otherwise null
* @param {Integer} algo Algorithm to be used (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Algorithm dependent multiprecision integers
* of the public key part of the private key
* @param {openpgp_type_mpi[]} secretMPIs Algorithm dependent multiprecision integers
* of the private key used
* @param {openpgp_type_mpi} data Data to be encrypted as MPI
* @return {BigInteger} returns a big integer containing the decrypted data; otherwise null
*/
function openpgp_crypto_asymetricDecrypt(algo, publicMPIs, secretMPIs, dataMPIs) {
@ -85,8 +87,8 @@ function openpgp_crypto_asymetricDecrypt(algo, publicMPIs, secretMPIs, dataMPIs)
/**
* generate random byte prefix as string for the specified algorithm
* @param algo [Integer] algorithm to use (see RFC4880 9.2)
* @return [String] random bytes with length equal to the block
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @return {String} Random bytes with length equal to the block
* size of the cipher
*/
function openpgp_crypto_getPrefixRandom(algo) {
@ -107,10 +109,10 @@ function openpgp_crypto_getPrefixRandom(algo) {
/**
* retrieve the MDC prefixed bytes by decrypting them
* @param algo [Integer] algorithm to use (see RFC4880 9.2)
* @param key [String] key as string. length is depending on the algorithm used
* @param data [String] encrypted data where the prefix is decrypted from
* @return [String] plain text data of the prefixed data
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @param {String} key Key as string. length is depending on the algorithm used
* @param {String} data Encrypted data where the prefix is decrypted from
* @return {String} Plain text data of the prefixed data
*/
function openpgp_crypto_MDCSystemBytes(algo, key, data) {
util.print_debug_hexstr_dump("openpgp_crypto_symmetricDecrypt:\nencrypteddata:",data);
@ -138,8 +140,8 @@ function openpgp_crypto_MDCSystemBytes(algo, key, data) {
}
/**
* Generating a session key for the specified symmetric algorithm
* @param algo [Integer] algorithm to use (see RFC4880 9.2)
* @return [String] random bytes as a string to be used as a key
* @param {Integer} algo Algorithm to use (see RFC4880 9.2)
* @return {String} Random bytes as a string to be used as a key
*/
function openpgp_crypto_generateSessionKey(algo) {
switch (algo) {
@ -160,12 +162,12 @@ function openpgp_crypto_generateSessionKey(algo) {
/**
*
* @param algo [Integer] public key algorithm
* @param hash_algo [Integer] hash algorithm
* @param msg_MPIs [Array[openpgp_type_mpi]] signature multiprecision integers
* @param publickey_MPIs [Array[openpgp_type_mpi]] public key multiprecision integers
* @param data [String] data on where the signature was computed on.
* @return true if signature (sig_data was equal to data over hash)
* @param {Integer} algo public Key algorithm
* @param {Integer} hash_algo Hash algorithm
* @param {openpgp_type_mpi[]} msg_MPIs Signature multiprecision integers
* @param {openpgp_type_mpi[]} publickey_MPIs Public key multiprecision integers
* @param {String} data Data on where the signature was computed on.
* @return {Boolean} true if signature (sig_data was equal to data over hash)
*/
function openpgp_crypto_verifySignature(algo, hash_algo, msg_MPIs, publickey_MPIs, data) {
var calc_hash = openpgp_crypto_hashData(hash_algo, data);
@ -207,12 +209,14 @@ function openpgp_crypto_verifySignature(algo, hash_algo, msg_MPIs, publickey_MPI
/**
* Create a signature on data using the specified algorithm
* @param hash_algo [Integer] hash algorithm to use (See RFC4880 9.4)
* @param algo [Integer] asymmetric cipher algorithm to use (See RFC4880 9.1)
* @param publicMPIs [Array[openpgp_type_mpi]] public key multiprecision integers of the private key
* @param secretMPIs [Array[openpgp_type_mpi]] private key multiprecision integers which is used to sign the data
* @param data [String] data to be signed
* @return [String or openpgp_type_mpi]
* @param {Integer} hash_algo hash Algorithm to use (See RFC4880 9.4)
* @param {Integer} algo Asymmetric cipher algorithm to use (See RFC4880 9.1)
* @param {openpgp_type_mpi[]} publicMPIs Public key multiprecision integers
* of the private key
* @param {openpgp_type_mpi[]} secretMPIs Private key multiprecision
* integers which is used to sign the data
* @param {String} data Data to be signed
* @return {(String|openpgp_type_mpi)}
*/
function openpgp_crypto_signData(hash_algo, algo, publicMPIs, secretMPIs, data) {
@ -247,10 +251,10 @@ function openpgp_crypto_signData(hash_algo, algo, publicMPIs, secretMPIs, data)
}
/**
* create a hash on the specified data using the specified algorithm
* @param algo [Integer] hash algorithm type (see RFC4880 9.4)
* @param data [String] data to be hashed
* @return [String] hash value
* Create a hash on the specified data using the specified algorithm
* @param {Integer} algo Hash algorithm type (see RFC4880 9.4)
* @param {String} data Data to be hashed
* @return {String} hash value
*/
function openpgp_crypto_hashData(algo, data) {
var hash = null;
@ -282,9 +286,9 @@ function openpgp_crypto_hashData(algo, data) {
}
/**
* returns the hash size in bytes of the specified hash algorithm type
* @param algo [Integer] hash algorithm type (See RFC4880 9.4)
* @return [Integer] size in bytes of the resulting hash
* Returns the hash size in bytes of the specified hash algorithm type
* @param {Integer} algo Hash algorithm type (See RFC4880 9.4)
* @return {Integer} Size in bytes of the resulting hash
*/
function openpgp_crypto_getHashByteLength(algo) {
var hash = null;
@ -307,9 +311,9 @@ function openpgp_crypto_getHashByteLength(algo) {
}
/**
* retrieve secure random byte string of the specified length
* @param length [Integer] length in bytes to generate
* @return [String] random byte string
* Retrieve secure random byte string of the specified length
* @param {Integer} length Length in bytes to generate
* @return {String} Random byte string
*/
function openpgp_crypto_getRandomBytes(length) {
var result = '';
@ -320,20 +324,20 @@ function openpgp_crypto_getRandomBytes(length) {
}
/**
* return a pseudo-random number in the specified range
* @param from [Integer] min of the random number
* @param to [Integer] max of the random number (max 32bit)
* @return [Integer] a pseudo random number
* Return a pseudo-random number in the specified range
* @param {Integer} from Min of the random number
* @param {Integer} to Max of the random number (max 32bit)
* @return {Integer} A pseudo random number
*/
function openpgp_crypto_getPseudoRandom(from, to) {
return Math.round(Math.random()*(to-from))+from;
}
/**
* return a secure random number in the specified range
* @param from [Integer] min of the random number
* @param to [Integer] max of the random number (max 32bit)
* @return [Integer] a secure random number
* Return a secure random number in the specified range
* @param {Integer} from Min of the random number
* @param {Integer} to Max of the random number (max 32bit)
* @return {Integer} A secure random number
*/
function openpgp_crypto_getSecureRandom(from, to) {
var buf = new Uint32Array(1);
@ -351,9 +355,9 @@ function openpgp_crypto_getSecureRandomOctet() {
}
/**
* create a secure random big integer of bits length
* @param bits [Integer] bit length of the MPI to create
* @return [BigInteger] resulting big integer
* Create a secure random big integer of bits length
* @param {Integer} bits Bit length of the MPI to create
* @return {BigInteger} Resulting big integer
*/
function openpgp_crypto_getRandomBigInteger(bits) {
if (bits < 0)
@ -392,11 +396,19 @@ function openpgp_crypto_testRSA(key){
var msg = rsa.encrypt(mpi.toBigInteger(),key.ee,key.n);
var result = rsa.decrypt(msg, key.d, key.p, key.q, key.u);
}
/**
* calls the necessary crypto functions to generate a keypair. Called directly by openpgp.js
* @keyType [int] follows OpenPGP algorithm convention.
* @numBits [int] number of bits to make the key to be generated
* @return {privateKey: [openpgp_packet_keymaterial] , publicKey: [openpgp_packet_keymaterial]}
* @typedef {Object} openpgp_keypair
* @property {openpgp_packet_keymaterial} privateKey
* @property {openpgp_packet_keymaterial} publicKey
*/
/**
* Calls the necessary crypto functions to generate a keypair.
* Called directly by openpgp.js
* @param {Integer} keyType Follows OpenPGP algorithm convention.
* @param {Integer} numBits Number of bits to make the key to be generated
* @return {openpgp_keypair}
*/
function openpgp_crypto_generateKeyPair(keyType, numBits, passphrase, s2kHash, symmetricEncryptionAlgorithm){
var privKeyPacket;