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Diffstat (limited to 'vnfmarket/src/main/webapp/vnfmarket/node_modules/jodid25519/lib/curve255.js')
| -rw-r--r-- | vnfmarket/src/main/webapp/vnfmarket/node_modules/jodid25519/lib/curve255.js | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/vnfmarket/src/main/webapp/vnfmarket/node_modules/jodid25519/lib/curve255.js b/vnfmarket/src/main/webapp/vnfmarket/node_modules/jodid25519/lib/curve255.js new file mode 100644 index 00000000..3978b46e --- /dev/null +++ b/vnfmarket/src/main/webapp/vnfmarket/node_modules/jodid25519/lib/curve255.js @@ -0,0 +1,221 @@ +"use strict"; +/** + * @fileOverview + * Core operations on curve 25519 required for the higher level modules. + */ + +/* + * Copyright (c) 2007, 2013, 2014 Michele Bini + * Copyright (c) 2014 Mega Limited + * under the MIT License. + * + * Authors: Guy K. Kloss, Michele Bini + * + * You should have received a copy of the license along with this program. + */ + +var core = require('./core'); +var utils = require('./utils'); + + /** + * @exports jodid25519/curve255 + * Legacy compatibility module for Michele Bini's previous curve255.js. + * + * @description + * Legacy compatibility module for Michele Bini's previous curve255.js. + * + * <p> + * This code presents an API with all key formats as previously available + * from Michele Bini's curve255.js implementation. + * </p> + */ + var ns = {}; + + function curve25519_raw(f, c) { + var a, x_1, q; + + x_1 = c; + a = core.dbl(x_1, core.ONE()); + q = [x_1, core.ONE()]; + + var n = 255; + + while (core.getbit(f, n) == 0) { + n--; + // For correct constant-time operation, bit 255 should always be + // set to 1 so the following 'while' loop is never entered. + if (n < 0) { + return core.ZERO(); + } + } + n--; + + var aq = [a, q]; + + while (n >= 0) { + var r, s; + var b = core.getbit(f, n); + r = core.sum(aq[0][0], aq[0][1], aq[1][0], aq[1][1], x_1); + s = core.dbl(aq[1 - b][0], aq[1 - b][1]); + aq[1 - b] = s; + aq[b] = r; + n--; + } + q = aq[1]; + + q[1] = core.invmodp(q[1]); + q[0] = core.mulmodp(q[0], q[1]); + core.reduce(q[0]); + return q[0]; + } + + function curve25519b32(a, b) { + return _base32encode(curve25519(_base32decode(a), + _base32decode(b))); + } + + function curve25519(f, c) { + if (!c) { + c = core.BASE(); + } + f[0] &= 0xFFF8; + f[15] = (f[15] & 0x7FFF) | 0x4000; + return curve25519_raw(f, c); + } + + function _hexEncodeVector(k) { + var hexKey = utils.hexEncode(k); + // Pad with '0' at the front. + hexKey = new Array(64 + 1 - hexKey.length).join('0') + hexKey; + // Invert bytes. + return hexKey.split(/(..)/).reverse().join(''); + } + + function _hexDecodeVector(v) { + // assert(length(x) == 64); + // Invert bytes. + var hexKey = v.split(/(..)/).reverse().join(''); + return utils.hexDecode(hexKey); + } + + + // Expose some functions to the outside through this name space. + + /** + * Computes the scalar product of a point on the curve 25519. + * + * This function is used for the DH key-exchange protocol. + * + * Before multiplication, some bit operations are applied to the + * private key to ensure it is a valid Curve25519 secret key. + * It is the user's responsibility to make sure that the private + * key is a uniformly random, secret value. + * + * @function + * @param f {array} + * Private key. + * @param c {array} + * Public point on the curve. If not given, the curve's base point is used. + * @returns {array} + * Key point resulting from scalar product. + */ + ns.curve25519 = curve25519; + + /** + * Computes the scalar product of a point on the curve 25519. + * + * This variant does not make sure that the private key is valid. + * The user has the responsibility to ensure the private key is + * valid or that this results in a safe protocol. Unless you know + * exactly what you are doing, you should not use this variant, + * please use 'curve25519' instead. + * + * @function + * @param f {array} + * Private key. + * @param c {array} + * Public point on the curve. If not given, the curve's base point is used. + * @returns {array} + * Key point resulting from scalar product. + */ + ns.curve25519_raw = curve25519_raw; + + /** + * Encodes the internal representation of a key to a canonical hex + * representation. + * + * This is the format commonly used in other libraries and for + * test vectors, and is equivalent to the hex dump of the key in + * little-endian binary format. + * + * @function + * @param n {array} + * Array representation of key. + * @returns {string} + * Hexadecimal string representation of key. + */ + ns.hexEncodeVector = _hexEncodeVector; + + /** + * Decodes a canonical hex representation of a key + * to an internally compatible array representation. + * + * @function + * @param n {string} + * Hexadecimal string representation of key. + * @returns {array} + * Array representation of key. + */ + ns.hexDecodeVector = _hexDecodeVector; + + /** + * Encodes the internal representation of a key into a + * hexadecimal representation. + * + * This is a strict positional notation, most significant digit first. + * + * @function + * @param n {array} + * Array representation of key. + * @returns {string} + * Hexadecimal string representation of key. + */ + ns.hexencode = utils.hexEncode; + + /** + * Decodes a hex representation of a key to an internally + * compatible array representation. + * + * @function + * @param n {string} + * Hexadecimal string representation of key. + * @returns {array} + * Array representation of key. + */ + ns.hexdecode = utils.hexDecode; + + /** + * Encodes the internal representation of a key to a base32 + * representation. + * + * @function + * @param n {array} + * Array representation of key. + * @returns {string} + * Base32 string representation of key. + */ + ns.base32encode = utils.base32encode; + + /** + * Decodes a base32 representation of a key to an internally + * compatible array representation. + * + * @function + * @param n {string} + * Base32 string representation of key. + * @returns {array} + * Array representation of key. + */ + ns.base32decode = utils.base32decode; + +module.exports = ns; |