32fabd0c0f
"Keypair" is a more explanatory name, and also should be less confused with other kinds of keys (particularly "cipher keys", which are the keys used in symmetric block ciphers, especially AES).
33 lines
760 B
JavaScript
33 lines
760 B
JavaScript
var Bn = require('./bn');
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var Privkey = require('./privkey');
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var Point = require('./point');
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var Pubkey = require('./pubkey');
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var Keypair = require('./keypair');
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var Hash = require('./hash');
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function KDF() {
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};
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KDF.buf2keypair = function(buf) {
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return KDF.sha256hmac2keypair(buf);
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};
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KDF.sha256hmac2keypair = function(buf) {
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var privkey = KDF.sha256hmac2privkey(buf);
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var keypair = Keypair().fromPrivkey(privkey);
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return keypair;
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};
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KDF.sha256hmac2privkey = function(buf) {
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var bn;
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var concat = new Buffer([]);
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do {
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var hash = Hash.sha256hmac(buf, concat);
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var bn = Bn.fromBuffer(hash);
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concat = Buffer.concat([concat, new Buffer(0)]);
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} while(!bn.lt(Point.getN()));
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return new Privkey({bn: bn});
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};
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module.exports = KDF;
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