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move hex2Uint8array to utils

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This commit is contained in:
Sanjana Rajan 2017-07-26 15:22:49 +02:00
parent fade832619
commit 840c0229f8
2 changed files with 12 additions and 9 deletions
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12
src/crypto/public_key/elliptic/ecdh.js
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@ -42,13 +42,6 @@ import util from '../../../util.js';
import type_kdf_params from '../../../type/kdf_params.js';
import type_oid from '../../../type/oid.js';
function hex2Uint8Array(hex) {
var result = new Uint8Array(hex.length/2);
for (var k=0; k<hex.length/2; k++) {
result[k] = parseInt(hex.substr(2*k, 2), 16);
}
return result;
}
// Build Param for ECDH algorithm (RFC 6637)
function buildEcdhParam(public_algo, oid, cipher_algo, hash_algo, fingerprint) {
@ -72,6 +65,7 @@ function kdf(hash_algo, X, length, param) {
])).subarray(0, length);
}
/**
* Encrypt and wrap a session key
*
@ -84,7 +78,7 @@ function kdf(hash_algo, X, length, param) {
* @return {{V: BigInteger, C: Uint8Array}} Returns ephemeral key and encoded session key
*/
function encrypt(oid, cipher_algo, hash_algo, m, R, fingerprint) {
fingerprint = hex2Uint8Array(fingerprint);
fingerprint = util.hex2Uint8Array(fingerprint);
const param = buildEcdhParam(enums.publicKey.ecdh, oid, cipher_algo, hash_algo, fingerprint);
const curve = curves.get(oid);
cipher_algo = enums.read(enums.symmetric, cipher_algo);
@ -112,7 +106,7 @@ function encrypt(oid, cipher_algo, hash_algo, m, R, fingerprint) {
* @return {Uint8Array} Value derived from session
*/
function decrypt(oid, cipher_algo, hash_algo, V, C, r, fingerprint) {
fingerprint = hex2Uint8Array(fingerprint);
fingerprint = util.hex2Uint8Array(fingerprint);
const param = buildEcdhParam(enums.publicKey.ecdh, oid, cipher_algo, hash_algo, fingerprint);
const curve = curves.get(oid);
cipher_algo = enums.read(enums.symmetric, cipher_algo);

9
src/util.js
View File

@ -169,6 +169,15 @@ export default {
return str;
},
hex2Uint8Array: function (hex) {
var result = new Uint8Array(hex.length/2);
for (var k=0; k<hex.length/2; k++) {
result[k] = parseInt(hex.substr(2*k, 2), 16);
}
return result;
},
/**
* Creating a hex string from an binary array of integers (0..255)
* @param {String} str Array of bytes to convert