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50 lines
1.2 KiB
50 lines
1.2 KiB
node-asn1 is a library for encoding and decoding ASN.1 datatypes in pure JS. |
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Currently BER encoding is supported; at some point I'll likely have to do DER. |
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## Usage |
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Mostly, if you're *actually* needing to read and write ASN.1, you probably don't |
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need this readme to explain what and why. If you have no idea what ASN.1 is, |
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see this: ftp://ftp.rsa.com/pub/pkcs/ascii/layman.asc |
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The source is pretty much self-explanatory, and has read/write methods for the |
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common types out there. |
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### Decoding |
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The following reads an ASN.1 sequence with a boolean. |
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var Ber = require('asn1').Ber; |
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var reader = new Ber.Reader(Buffer.from([0x30, 0x03, 0x01, 0x01, 0xff])); |
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reader.readSequence(); |
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console.log('Sequence len: ' + reader.length); |
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if (reader.peek() === Ber.Boolean) |
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console.log(reader.readBoolean()); |
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### Encoding |
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The following generates the same payload as above. |
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var Ber = require('asn1').Ber; |
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var writer = new Ber.Writer(); |
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writer.startSequence(); |
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writer.writeBoolean(true); |
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writer.endSequence(); |
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console.log(writer.buffer); |
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## Installation |
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npm install asn1 |
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## License |
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MIT. |
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## Bugs |
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See <https://github.com/joyent/node-asn1/issues>.
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