mirror of
https://github.com/fluencelabs/js-libp2p-crypto
synced 2025-04-29 04:22:27 +00:00
a0f387aeab
* fix: replace node buffers with uint8arrays All usage of node buffers have been replaced with uint8arrays. BREAKING CHANGES: - Where node Buffers were returned, now Uint8Arrays are * chore: remove commented code
44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
'use strict'
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require('node-forge/lib/util')
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require('node-forge/lib/jsbn')
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const forge = require('node-forge/lib/forge')
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const uint8ArrayFromString = require('uint8arrays/from-string')
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const uint8ArrayToString = require('uint8arrays/to-string')
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const uint8ArrayConcat = require('uint8arrays/concat')
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exports.bigIntegerToUintBase64url = (num, len) => {
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// Call `.abs()` to convert to unsigned
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let buf = Uint8Array.from(num.abs().toByteArray()) // toByteArray converts to big endian
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// toByteArray() gives us back a signed array, which will include a leading 0
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// byte if the most significant bit of the number is 1:
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// https://docs.microsoft.com/en-us/windows/win32/seccertenroll/about-integer
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// Our number will always be positive so we should remove the leading padding.
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buf = buf[0] === 0 ? buf.slice(1) : buf
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if (len != null) {
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if (buf.length > len) throw new Error('byte array longer than desired length')
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buf = uint8ArrayConcat([new Uint8Array(len - buf.length), buf])
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}
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return uint8ArrayToString(buf, 'base64url')
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}
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// Convert a base64url encoded string to a BigInteger
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exports.base64urlToBigInteger = str => {
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const buf = exports.base64urlToBuffer(str)
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return new forge.jsbn.BigInteger(uint8ArrayToString(buf, 'base16'), 16)
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}
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exports.base64urlToBuffer = (str, len) => {
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let buf = uint8ArrayFromString(str, 'base64urlpad')
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if (len != null) {
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if (buf.length > len) throw new Error('byte array longer than desired length')
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buf = uint8ArrayConcat([new Uint8Array(len - buf.length), buf])
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}
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return buf
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}
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