mirror of
https://github.com/wader/fq.git
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e3ae1440c9
Feels less cluttered, easier to read and more consistent. Still keep tovalue, tobytes etc that are more basic functions this only renamed format related functions. Also there is an exceptin for to/fromjson as it comes from jq. Also fixes lots of spelling errors while reading thru.
40 lines
1.1 KiB
Plaintext
40 lines
1.1 KiB
Plaintext
$ fq -h asn1_ber
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asn1_ber: ASN1 BER (basic encoding rules, also CER and DER) decoder
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Decode examples
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===============
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# Decode file as asn1_ber
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$ fq -d asn1_ber . file
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# Decode value as asn1_ber
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... | asn1_ber
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Supports decoding BER, CER and DER (X.690).
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- Currently no extra validation is done for CER and DER.
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- Does not support specifying a schema.
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- Supports torepr but without schema all sequences and sets will be arrays.
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Can be used to decode certificates etc
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======================================
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$ fq -d bytes 'from_pem | asn1_ber | d' cert.pem
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Can decode nested values
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========================
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$ fq -d asn1_ber '.constructed[1].value | asn1_ber' file.ber
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Manual schema
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=============
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$ fq -d asn1_ber 'torepr as $r | ["version", "modulus", "private_exponent", "private_exponen", "prime1", "prime2", "exponent1", "exponent2", "coefficient"] | with_entries({key: .value, value: $r[.key]})' pkcs1.der
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References
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==========
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- https://www.itu.int/ITU-T/studygroups/com10/languages/X.690_1297.pdf
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- https://en.wikipedia.org/wiki/X.690
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- https://letsencrypt.org/docs/a-warm-welcome-to-asn1-and-der/
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- https://lapo.it/asn1js/
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