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//! https://sequoia-pgp.org/guide/exploring-openpgp/

extern crate sequoia_openpgp as openpgp;
use crate::openpgp::cert::components::Amalgamation;
use crate::openpgp::parse::Parse;
use crate::openpgp::policy::StandardPolicy as P;

fn main() {
    let p = &P::new();

    let cert =
        "-----BEGIN PGP PUBLIC KEY BLOCK-----

         mQENBFpxtsABCADZcBa1Q3ZLZnju18o0+t8LoQuIIeyeUQ0H45y6xUqyrD5HSkVM
         VGQs6IHLq70mAizBJ4VznUVqVOh/NhOlapXi6/TKpjHvttdg45o6Pgqa0Kx64luT
         ZY+TEKyILcdBdhr3CzsEILnQst5jadgMvU9fnT/EkJIvxtWPlUzU5R7nnALO626x
         2M5Pj3k0h3ZNHMmYQQtReX/RP/xUh2SfOYG6i/MCclIlee8BXHB9k0bW2NAX2W7H
         rLDGPm1LzmyqxFGDvDvfPlYZ5nN2cbGsv3w75LDzv75kMhVnkZsrUjnHjVRzFq7q
         fSIpxlvJMEMKSIJ/TFztQoOBO5OlBb5qzYPpABEBAAG0F+G8iM+BzrnPg8+Ezr/P
         hM6tzrvOt8+CiQFUBBMBCAA+FiEEfcpYtU6xQxad3uFfJH9tq8hJFP4FAlpxtsAC
         GwMFCQPCZwAFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQJH9tq8hJFP49hgf+
         IKvec0RkD9EHSLFc6AKDm/knaI4AIH0isZTz9jRCF8H/j3h8QVUE+/0jtCcyvR6F
         TGVSfO3pelDPYGIjDFI3aA6H/UlhZWzYRXZ+QQRrV0zwvLna3XjiW8ib3Ky+5bpQ
         0uVeee30u+U3SnaCL9QB4+UvwVvAxRuk49Z0Q8TsRrQyQNYpeZDN7uNrvA134cf6
         6pLUvzPG4lMLIvSXFuHou704EhT7NS3wAzFtjMrsLLieVqtbEi/kBaJTQSZQwjVB
         sE/Z8lp1heKw/33Br3cB63n4cTf0FdoFywDBhCAMU7fKboU5xBpm5bQJ4ck6j6w+
         BKG1FiQRR6PCUeb6GjxVOrkBDQRacbbAAQgAw538MMb/pRdpt7PTgBCedw+rU9fh
         onZYKwmCO7wz5VrVf8zIVvWKxhX6fBTSAy8mxaYbeL/3woQ9Leuo8f0PQNs9zw1N
         mdH+cnm2KQmL9l7/HQKMLgEAu/0C/q7ii/j8OMYitaMUyrwy+OzW3nCal/uJHIfj
         bdKx29MbKgF/zaBs8mhTvf/Tu0rIVNDPEicwijDEolGSGebZxdGdHJA31uayMHDK
         /mwySJViMZ8b+Lzc/dRgNbQoY6yjsjso7U9OZpQK1fooHOSQS6iLsSSsZLcGPD+7
         m7j3jwq68SIJPMsu0O8hdjFWL4Cfj815CwptAxRGkp00CIusAabO7m8DzwARAQAB
         iQE2BBgBCAAgFiEEfcpYtU6xQxad3uFfJH9tq8hJFP4FAlpxtsACGwwACgkQJH9t
         q8hJFP5rmQgAoYOUXolTiQmWipJTdMG/VZ5X7mL8JiBWAQ11K1o01cZCMlziyHnJ
         xJ6Mqjb6wAFpYBtqysJG/vfjc/XEoKgfFs7+zcuEnt41xJQ6tl/L0VTxs+tEwjZu
         Rp/owB9GCkqN9+xNEnlH77TLW1UisW+l0F8CJ2WFOj4lk9rcXcLlEdGmXfWIlVCb
         2/o0DD+HDNsF8nWHpDEy0mcajkgIUTvXQaDXKbccX6Wgep8dyBP7YucGmRPd9Z6H
         bGeT3KvlJlH5kthQ9shsmT14gYwGMR6rKpNUXmlpetkjqUK7pGVaHGgJWUZ9QPGU
         awwPdWWvZSyXJAPZ9lC5sTKwMJDwIxILug==
         =lAie
         -----END PGP PUBLIC KEY BLOCK-----";

    // Parse the Cert.
    let pile = openpgp::PacketPile::from_bytes(cert).unwrap();

    // Iterate over children.
    for (i, p) in pile.children().enumerate() {
        println!("{}: {:?}", i, p);
    }

    // Some space to make the output easier to parse.
    println!();

    // Parse into Cert.
    let cert = openpgp::Cert::from_packet_pile(pile).unwrap();
    println!("Fingerprint: {}", cert.fingerprint());

    // List userids.
    for (i, ca) in cert.userids().with_policy(p, None).enumerate() {
        println!("{}: UID: {}, {} self-signature(s), {} certification(s)",
                 i, ca.userid(),
                 ca.bundle().self_signatures().len(),
                 ca.bundle().certifications().len());
    }

    // List subkeys.
    for (i, ka) in cert.keys().with_policy(p, None).skip(1).enumerate() {
        println!("{}: Fingerprint: {}, {} self-signature(s), {} certification(s)",
                 i, ka.key().fingerprint(),
                 ka.bundle().self_signatures().len(),
                 ka.bundle().certifications().len());
    }
}