Skip to content
Strict DER signatures
Branch: master
Clone or download
Latest commit 9d71107 May 29, 2017
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
test
.gitignore
.travis.yml
LICENSE Initial commit Aug 21, 2015
README.md
index.js use safe-buffer May 29, 2017
package.json

README.md

bip66

NPM Package Build Status

js-standard-style

Strict DER signature encoding/decoding.

See bip66.

  • This module works only with two's complement numbers.
  • BIP66 doesn't check that r or s are fully valid.
    • check/decode doesn't check that r or s great than 33 bytes or that this number represent valid point on elliptic curve.
    • encode doesn't check that r/s represent valid point on elliptic curve.

Example

var bip66 = require('bip66')
var r = new Buffer('1ea1fdff81b3a271659df4aad19bc4ef83def389131a36358fe64b245632e777', 'hex')
var s = new Buffer('29e164658be9ce810921bf81d6b86694785a79ea1e52dbfa5105148d1f0bc1', 'hex')

bip66.encode(r, s)
// Buffer <30 43 02 20 1e a1 fd ff 81 b3 a2 71 65 9d f4 aa d1 9b c4 ef 83 de f3 89 13 1a 36 35 8f e6 4b 24 56 32 e7 77 02 1f 29 e1 64 65 8b e9 ce 81 09 21 bf 81 d6 b8 66 94 78 5a 79 ea 1e 52 db fa 51 05 14 8d 1f 0b c1>

var signature = new Buffer('304302201ea1fdff81b3a271659df4aad19bc4ef83def389131a36358fe64b245632e777021f29e164658be9ce810921bf81d6b86694785a79ea1e52dbfa5105148d1f0bc1', 'hex')
bip66.decode(signature)
// => {
//	r: Buffer <1e a1 fd ff 81 b3 a2 71 65 9d f4 aa d1 9b c4 ef 83 de f3 89 13 1a 36 35 8f e6 4b 24 56 32 e7 77>,
//	s: Buffer <29 e1 64 65 8b e9 ce 81 09 21 bf 81 d6 b8 66 94 78 5a 79 ea 1e 52 db fa 51 05 14 8d 1f 0b c1>
// }

A catch-all exception regex:

/Expected DER (integer|sequence)|(R|S) value (excessively padded|is negative)|(R|S|DER sequence) length is (zero|too short|too long|invalid)/

LICENSE MIT

You can’t perform that action at this time.