bitcoinjs/bip66

Name: bip66

Owner: BitcoinJS

Description: Strict DER signatures

Created: 2015-08-21 05:11:05.0

Updated: 2018-05-15 02:14:55.0

Pushed: 2017-05-29 02:53:23.0

Homepage: null

Size: 28

Language: JavaScript

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README

bip66

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

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

6.encode(r, s)
uffer <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>

signature = new Buffer('304302201ea1fdff81b3a271659df4aad19bc4ef83def389131a36358fe64b245632e777021f29e164658be9ce810921bf81d6b86694785a79ea1e52dbfa5105148d1f0bc1', 'hex')
6.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:

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

LICENSE MIT