{"id":47444116,"url":"https://github.com/bad-antics/ASN1.jl","last_synced_at":"2026-04-06T13:00:59.755Z","repository":{"id":344669595,"uuid":"1182658919","full_name":"bad-antics/ASN1.jl","owner":"bad-antics","description":"ASN.1/DER/BER encoder-decoder with X.509 certificate parser for Julia","archived":false,"fork":false,"pushed_at":"2026-03-15T20:10:44.000Z","size":14,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-03-16T07:58:34.700Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Julia","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/bad-antics.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-03-15T20:06:42.000Z","updated_at":"2026-03-15T20:10:44.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/bad-antics/ASN1.jl","commit_stats":null,"previous_names":["bad-antics/asn1.jl"],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/bad-antics/ASN1.jl","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/bad-antics%2FASN1.jl","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/bad-antics%2FASN1.jl/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/bad-antics%2FASN1.jl/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/bad-antics%2FASN1.jl/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/bad-antics","download_url":"https://codeload.github.com/bad-antics/ASN1.jl/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/bad-antics%2FASN1.jl/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":31473271,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-06T08:36:52.050Z","status":"ssl_error","status_checked_at":"2026-04-06T08:36:51.267Z","response_time":112,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2026-03-23T06:00:59.902Z","updated_at":"2026-04-06T13:00:59.734Z","avatar_url":"https://github.com/bad-antics.png","language":"Julia","funding_links":[],"categories":["Data Forensics and Analysis"],"sub_categories":["Data Parsing"],"readme":"# ASN1.jl\n\n[![Tests](https://img.shields.io/badge/tests-106%20passed-brightgreen)]()\n\nA pure-Julia ASN.1 (Abstract Syntax Notation One) encoder/decoder supporting DER and BER encoding rules, with built-in X.509 certificate parsing. Zero external dependencies.\n\n## Features\n\n- **DER/BER Decoder** — parse any DER/BER-encoded ASN.1 data into a tree\n- **DER Encoder** — encode ASN.1 nodes back to DER format\n- **All universal types** — BOOLEAN, INTEGER, BIT STRING, OCTET STRING, NULL, OID, SEQUENCE, SET, UTCTime, GeneralizedTime, UTF8String, PrintableString, IA5String\n- **X.509 Certificate Parser** — extract version, serial, issuer, subject, validity, public key, extensions\n- **PEM Support** — decode PEM-wrapped certificates\n- **OID Registry** — human-readable names for common OIDs\n- **Round-trip safe** — encode → decode → encode produces identical output\n- **BigInt support** — handles arbitrarily large integers\n\n## Installation\n\n```julia\nusing Pkg\nPkg.add(\"ASN1\")\n```\n\n## Quick Start\n\n```julia\nusing ASN1\n\n# Decode DER data\nnode = decode(der_bytes)\n\n# Encode to DER\nbytes = encode(node)\n\n# Parse X.509 certificate\ncert = parse_x509(der_bytes)\nprintln(cert.subject)        # Dict(\"commonName\" =\u003e \"example.com\", ...)\nprintln(cert.not_after)      # DateTime\nprintln(cert.signature_algorithm)  # \"sha256WithRSAEncryption\"\n\n# Parse PEM certificate\ncert = parse_x509_pem(pem_string)\n```\n\n## Building ASN.1 Structures\n\n```julia\nusing ASN1\n\n# Primitives\nASN1.asn1_boolean(true)\nASN1.asn1_integer(42)\nASN1.asn1_integer(BigInt(2)^256)\nASN1.asn1_null()\nASN1.asn1_octet_string(UInt8[0x01, 0x02])\nASN1.asn1_bit_string(UInt8[0xFF])\nASN1.asn1_oid(\"1.2.840.113549.1.1.11\")\nASN1.asn1_utf8string(\"Hello\")\nASN1.asn1_printable_string(\"Test\")\n\n# Constructed types\nASN1.asn1_sequence([node1, node2])\nASN1.asn1_set([node1, node2])\n\n# Time\nASN1.asn1_utctime(DateTime(2025, 1, 1))\nASN1.asn1_generalized_time(DateTime(2025, 1, 1))\n\n# Context-specific tags\nASN1.asn1_context(0, [child_node])\n```\n\n## Value Extraction\n\n```julia\nASN1.extract_boolean(node)           # Bool\nASN1.extract_integer(node)           # BigInt\nASN1.extract_string(node)            # String\nASN1.extract_oid(node)               # \"1.2.840.113549.1.1.11\"\nASN1.extract_utctime(node)           # DateTime\nASN1.extract_generalized_time(node)  # DateTime\n```\n\n## X.509 Certificate Fields\n\n```julia\ncert = parse_x509(der_bytes)\n\ncert.version               # Int (1, 2, or 3)\ncert.serial_number         # BigInt\ncert.signature_algorithm   # String\ncert.issuer                # Dict{String,String}\ncert.subject               # Dict{String,String}\ncert.not_before            # DateTime\ncert.not_after             # DateTime\ncert.public_key_algorithm  # String\ncert.public_key_bytes      # Vector{UInt8}\ncert.extensions            # Dict{String,Any}\n```\n\n## API Reference\n\n| Function | Description |\n|----------|-------------|\n| `decode(data)` | Decode DER/BER bytes to ASN1Node tree |\n| `encode(node)` | Encode ASN1Node tree to DER bytes |\n| `decode_pem(pem)` | Decode PEM string to raw DER bytes |\n| `parse_x509(der)` | Parse DER-encoded X.509 certificate |\n| `parse_x509_pem(pem)` | Parse PEM-encoded X.509 certificate |\n\n## License\n\nMIT\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbad-antics%2FASN1.jl","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fbad-antics%2FASN1.jl","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbad-antics%2FASN1.jl/lists"}