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//! X.509 certificates implementation based on [RFC5280](https://tools.ietf.org/html/rfc5280)
//!
//! ## Example
//!
//! ```rust
//! use picky::key::PrivateKey;
//! use picky::pem::{parse_pem, Pem};
//! use picky::{signature::SignatureAlgorithm, hash::HashAlgorithm};
//! use picky::x509::key_id_gen_method::{KeyIdGenError, KeyIdGenMethod};
//! use picky::x509::{certificate::CertType, csr::Csr};
//! use picky::x509::{name::DirectoryName, date::UTCDate};
//! use picky::x509::certificate::CertificateBuilder;
//!
//!# use std::error::Error;
//!# fn main() -> Result<(), Box<dyn Error>> {
//!# let root_key_pem_str =
//!# "-----BEGIN PRIVATE KEY-----\n\
//!# MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCzl5R1QzQGznTe\n\
//!# Jw1STzQz1ZOrbG58ZWdJJDOrjBB60PO+MgOIxDzn41p4W/OeqmzhxUPyzs9d3iAx\n\
//!# RcF8gWkS8QvQXtHQtFlux61oE8GHvK9pqrEERQKjjTN/yculekauopAMQOcGDS1L\n\
//!# t55z5oByunc/ZQYKHIZ82zfuw/VyKOdJ31/fXn2Djhnfq19YE8pgBDGxEPqCRv7S\n\
//!# t/ThptUD+Xr3jwR2ycemq/OVLmsTETh8fYeGrcDIx2EsjL18ptPOg6rZly/UNN+w\n\
//!# Sy8L5HlJqzDj03ytYTkgpT442TK3eGpxwX5uaHF7GuL6l9xOIDH+FuPKMt1huFWC\n\
//!# Y+hHC8yXAgMBAAECggEATpCbM4lIs0mSOrUe0MkxbxOZ3D49P1IlEwwxRnSpqPDM\n\
//!# EIJUpXojotYE9+5R7zFjHIltpkTu1oOb1bJMaKk8TDsDDg7M/t5G2X2k0IkD+tuC\n\
//!# aVlwwwtlkiLtSpP+8M9DKJaZKaMi7bTKAfu757wIqSgFjsglEjtUYj6Mg3laYKvk\n\
//!# EoR6NsOojR1tOhqGfPFJTH21ZBWDmFHhsyRHXyZOQ9I2u8pv5l33yasgmuZLZ2g3\n\
//!# Hok6j0uU/fPpjSRTu6khVZV8+stjnFaHezTWGsz/CLqzC1EWJ1icFTb7UwafyWts\n\
//!# EHgdMjqpu2qfqB+miFElhld4fdZIoBWTQwCdN7MnUQKBgQDnBIK6RUJYUjcX9Nei\n\
//!# Qvf7Kl3sEY+QTQdI4na3puXjOk6eFqTUAbdsKVwU/yJyR3L+bQNTUmy3GdPlZkYt\n\
//!# mx18fGpq9t8whDIFZG9jI5YX4/vEMOHa9zY9FI3QLpIgbifIBEIR76UVe/xakT+I\n\
//!# bx8C1p/9msDuqVBJm7pZLIX3DQKBgQDHA2ftRkQVL0lOmvwFl56n2gbnnk0KAZ/8\n\
//!# LyuN9FvadqzbpXQqfEUS5f1cfM4JSAXj2e9POBw2FWD1uFROIGPrPEAfSqInI6G9\n\
//!# i/MSeBwlcvTXmWMphVGCnJwmCPlznT0Vizr5wIBImgUOpXZpxAqUQUvxOl4R4VYI\n\
//!# gLW8iFSpMwKBgCAzacFrC/9hnlpRf4kXipdQ5XyVSgyUIBLRtjiNI/gTVYgFof4H\n\
//!# KzkBXttyYKvLN8UtDsybbZnsGLQeGGQc/fQvJ2o3dQ6/LnW/9SK9gBteZOaI5cJu\n\
//!# uPm0lrvQ8f9hO1xO86KqY7ll6dv56QAsdQchQXXJD2F06kMIWOY7JYU1AoGAJSKg\n\
//!# kOjsqVtSfYV0A4MgSsfnQ+8JBxX4iXEv2mQ/g4tjg/TisU7RAM7DsS9krtyupK60\n\
//!# 9f5NXVYt6owDxzRKEMoEWRJvIYiHlLv5lnetINvLjjOECmpjJFEe3gYMriMoE84Q\n\
//!# Kixeg62hxfLgHqpDIxjwF8pBZWq7yAhkYRK7YXsCgYAxqdZwpOYyntEBIQa3mOE8\n\
//!# a2mthICUXKE30OkMJdrbP3qlFECWZcvKspPHzXWiy8cP9dS2D06ax/UBZmKGXUFv\n\
//!# D48nECaQ2glgMPLyyd+tznXed9nZVYBlOFjUQ0fvfpsmhp975n1b/UxAg1jqvigK\n\
//!# YHWKXfDNtZ9Ci6BMYVELsw==\n\
//!# -----END PRIVATE KEY-----";
//!# let intermediate_key_pem_str = root_key_pem_str;
//!# let leaf_key_pem_str = root_key_pem_str;
//!#
//! // Generate a self-signed root certificate
//!
//! // Load private key
//! let root_key = PrivateKey::from_pem_str(root_key_pem_str)?;
//!
//! let root = CertificateBuilder::new()
//! .validity(UTCDate::ymd(2020, 9, 28).unwrap(), UTCDate::ymd(2023, 9, 28).unwrap())
//! .self_signed(DirectoryName::new_common_name("My Root CA"), &root_key)
//! .ca(true)
//! .signature_hash_type(SignatureAlgorithm::RsaPkcs1v15(HashAlgorithm::SHA2_512))
//! .key_id_gen_method(KeyIdGenMethod::SPKFullDER(HashAlgorithm::SHA2_384))
//! .build()?;
//!
//! assert_eq!(root.ty(), CertType::Root);
//!
//! // Generate intermediate certificate signed by root CA
//!
//! let intermediate_key = PrivateKey::from_pem_str(intermediate_key_pem_str)?;
//!
//! let intermediate = CertificateBuilder::new()
//! .validity(UTCDate::ymd(2020, 10, 15).unwrap(), UTCDate::ymd(2021, 10, 15).unwrap())
//! .subject(DirectoryName::new_common_name("My Authority"), intermediate_key.to_public_key())
//! .issuer_cert(&root, &root_key)
//! .signature_hash_type(SignatureAlgorithm::RsaPkcs1v15(HashAlgorithm::SHA2_224))
//! .key_id_gen_method(KeyIdGenMethod::SPKValueHashedLeftmost160(HashAlgorithm::SHA1))
//! .ca(true)
//! .pathlen(0)
//! .build()?;
//!
//! assert_eq!(intermediate.ty(), CertType::Intermediate);
//!
//! // Generate leaf certificate signed by intermediate authority
//!
//! let leaf_key = PrivateKey::from_pem_str(leaf_key_pem_str)?;
//!
//! // A CSR can be used
//! let csr = Csr::generate(
//! DirectoryName::new_common_name("My Leaf"),
//! &leaf_key,
//! SignatureAlgorithm::RsaPkcs1v15(HashAlgorithm::SHA1),
//! )?;
//!
//! let signed_leaf = CertificateBuilder::new()
//! .validity(UTCDate::ymd(2020, 11, 1).unwrap(), UTCDate::ymd(2021, 1, 1).unwrap())
//! .subject_from_csr(csr)
//! .issuer_cert(&intermediate, &intermediate_key)
//! .signature_hash_type(SignatureAlgorithm::RsaPkcs1v15(HashAlgorithm::SHA2_384))
//! .key_id_gen_method(KeyIdGenMethod::SPKFullDER(HashAlgorithm::SHA2_512))
//! .build()?;
//!
//! assert_eq!(signed_leaf.ty(), CertType::Leaf);
//!
//! // Check leaf using CA chain
//!
//! let chain = [intermediate, root];
//!
//! signed_leaf
//! .verifier()
//! .chain(chain.iter())
//! .exact_date(&UTCDate::ymd(2020, 12, 20).unwrap())
//! .verify()?;
//!
//! // If `not_after` date is behind…
//!
//! let err = signed_leaf
//! .verifier()
//! .chain(chain.iter())
//! .exact_date(&UTCDate::ymd(2021, 1, 2).unwrap())
//! .verify()
//! .err()
//! .unwrap();
//!
//! assert_eq!(
//! err.to_string(),
//! "invalid certificate \'CN=My Leaf\': \
//! certificate expired (not after: 2021-01-01 00:00:00, now: 2021-01-02 00:00:00)"
//! );
//!#
//!# Ok(())
//!# }
//! ```
pub use Cert;
pub use Csr;
pub use KeyIdGenMethod;
pub use ;