chore: add vendor dependencies for kauma build

vendor/openssl/examples/mk_certs.rs

@@ -0,0 +1,160 @@
+#![allow(clippy::uninlined_format_args)]
+
+//! A program that generates ca certs, certs verified by the ca, and public
+//! and private keys.
+
+use openssl::asn1::Asn1Time;
+use openssl::bn::{BigNum, MsbOption};
+use openssl::error::ErrorStack;
+use openssl::hash::MessageDigest;
+use openssl::pkey::{PKey, PKeyRef, Private};
+use openssl::rsa::Rsa;
+use openssl::x509::extension::{
+    AuthorityKeyIdentifier, BasicConstraints, KeyUsage, SubjectAlternativeName,
+    SubjectKeyIdentifier,
+};
+use openssl::x509::{X509NameBuilder, X509Ref, X509Req, X509ReqBuilder, X509VerifyResult, X509};
+
+/// Make a CA certificate and private key
+fn mk_ca_cert() -> Result<(X509, PKey<Private>), ErrorStack> {
+    let rsa = Rsa::generate(2048)?;
+    let key_pair = PKey::from_rsa(rsa)?;
+
+    let mut x509_name = X509NameBuilder::new()?;
+    x509_name.append_entry_by_text("C", "US")?;
+    x509_name.append_entry_by_text("ST", "TX")?;
+    x509_name.append_entry_by_text("O", "Some CA organization")?;
+    x509_name.append_entry_by_text("CN", "ca test")?;
+    let x509_name = x509_name.build();
+
+    let mut cert_builder = X509::builder()?;
+    cert_builder.set_version(2)?;
+    let serial_number = {
+        let mut serial = BigNum::new()?;
+        serial.rand(159, MsbOption::MAYBE_ZERO, false)?;
+        serial.to_asn1_integer()?
+    };
+    cert_builder.set_serial_number(&serial_number)?;
+    cert_builder.set_subject_name(&x509_name)?;
+    cert_builder.set_issuer_name(&x509_name)?;
+    cert_builder.set_pubkey(&key_pair)?;
+    let not_before = Asn1Time::days_from_now(0)?;
+    cert_builder.set_not_before(&not_before)?;
+    let not_after = Asn1Time::days_from_now(365)?;
+    cert_builder.set_not_after(&not_after)?;
+
+    cert_builder.append_extension(BasicConstraints::new().critical().ca().build()?)?;
+    cert_builder.append_extension(
+        KeyUsage::new()
+            .critical()
+            .key_cert_sign()
+            .crl_sign()
+            .build()?,
+    )?;
+
+    let subject_key_identifier =
+        SubjectKeyIdentifier::new().build(&cert_builder.x509v3_context(None, None))?;
+    cert_builder.append_extension(subject_key_identifier)?;
+
+    cert_builder.sign(&key_pair, MessageDigest::sha256())?;
+    let cert = cert_builder.build();
+
+    Ok((cert, key_pair))
+}
+
+/// Make a X509 request with the given private key
+fn mk_request(key_pair: &PKey<Private>) -> Result<X509Req, ErrorStack> {
+    let mut req_builder = X509ReqBuilder::new()?;
+    req_builder.set_pubkey(key_pair)?;
+
+    let mut x509_name = X509NameBuilder::new()?;
+    x509_name.append_entry_by_text("C", "US")?;
+    x509_name.append_entry_by_text("ST", "TX")?;
+    x509_name.append_entry_by_text("O", "Some organization")?;
+    x509_name.append_entry_by_text("CN", "www.example.com")?;
+    let x509_name = x509_name.build();
+    req_builder.set_subject_name(&x509_name)?;
+
+    req_builder.sign(key_pair, MessageDigest::sha256())?;
+    let req = req_builder.build();
+    Ok(req)
+}
+
+/// Make a certificate and private key signed by the given CA cert and private key
+fn mk_ca_signed_cert(
+    ca_cert: &X509Ref,
+    ca_key_pair: &PKeyRef<Private>,
+) -> Result<(X509, PKey<Private>), ErrorStack> {
+    let rsa = Rsa::generate(2048)?;
+    let key_pair = PKey::from_rsa(rsa)?;
+
+    let req = mk_request(&key_pair)?;
+
+    let mut cert_builder = X509::builder()?;
+    cert_builder.set_version(2)?;
+    let serial_number = {
+        let mut serial = BigNum::new()?;
+        serial.rand(159, MsbOption::MAYBE_ZERO, false)?;
+        serial.to_asn1_integer()?
+    };
+    cert_builder.set_serial_number(&serial_number)?;
+    cert_builder.set_subject_name(req.subject_name())?;
+    cert_builder.set_issuer_name(ca_cert.subject_name())?;
+    cert_builder.set_pubkey(&key_pair)?;
+    let not_before = Asn1Time::days_from_now(0)?;
+    cert_builder.set_not_before(&not_before)?;
+    let not_after = Asn1Time::days_from_now(365)?;
+    cert_builder.set_not_after(&not_after)?;
+
+    cert_builder.append_extension(BasicConstraints::new().build()?)?;
+
+    cert_builder.append_extension(
+        KeyUsage::new()
+            .critical()
+            .non_repudiation()
+            .digital_signature()
+            .key_encipherment()
+            .build()?,
+    )?;
+
+    let subject_key_identifier =
+        SubjectKeyIdentifier::new().build(&cert_builder.x509v3_context(Some(ca_cert), None))?;
+    cert_builder.append_extension(subject_key_identifier)?;
+
+    let auth_key_identifier = AuthorityKeyIdentifier::new()
+        .keyid(false)
+        .issuer(false)
+        .build(&cert_builder.x509v3_context(Some(ca_cert), None))?;
+    cert_builder.append_extension(auth_key_identifier)?;
+
+    let subject_alt_name = SubjectAlternativeName::new()
+        .dns("*.example.com")
+        .dns("hello.com")
+        .build(&cert_builder.x509v3_context(Some(ca_cert), None))?;
+    cert_builder.append_extension(subject_alt_name)?;
+
+    cert_builder.sign(ca_key_pair, MessageDigest::sha256())?;
+    let cert = cert_builder.build();
+
+    Ok((cert, key_pair))
+}
+
+fn real_main() -> Result<(), ErrorStack> {
+    let (ca_cert, ca_key_pair) = mk_ca_cert()?;
+    let (cert, _key_pair) = mk_ca_signed_cert(&ca_cert, &ca_key_pair)?;
+
+    // Verify that this cert was issued by this ca
+    match ca_cert.issued(&cert) {
+        X509VerifyResult::OK => println!("Certificate verified!"),
+        ver_err => println!("Failed to verify certificate: {}", ver_err),
+    };
+
+    Ok(())
+}
+
+fn main() {
+    match real_main() {
+        Ok(()) => println!("Finished."),
+        Err(e) => println!("Error: {}", e),
+    };
+}