Merge pull request #1618 from toy/certificate-to-text

Convert certificate to human readable text using X509_print

openssl-sys/src/handwritten/x509.rs

@@ -633,3 +633,7 @@ extern "C" {
     pub fn X509_CRL_cmp(a: *const X509_CRL, b: *const X509_CRL) -> c_int;
     pub fn X509_CRL_match(a: *const X509_CRL, b: *const X509_CRL) -> c_int;
 }
+
+extern "C" {
+    pub fn X509_print(bio: *mut BIO, x509: *mut X509) -> c_int;
+}

openssl/src/x509/mod.rs

@@ -580,6 +580,13 @@ impl X509Ref {
         to_der,
         ffi::i2d_X509
     }
+
+    to_pem! {
+        /// Converts the certificate to human readable text.
+        #[corresponds(X509_print)]
+        to_text,
+        ffi::X509_print
+    }
 }
 
 impl ToOwned for X509Ref {

openssl/src/x509/tests.rs

@@ -476,3 +476,29 @@ fn test_load_subject_der() {
     ];
     X509Name::from_der(SUBJECT_DER).unwrap();
 }
+
+#[test]
+fn test_convert_to_text() {
+    let cert = include_bytes!("../../test/cert.pem");
+    let cert = X509::from_pem(cert).unwrap();
+
+    const SUBSTRINGS: &[&str] = &[
+        "Certificate:\n",
+        "Serial Number:",
+        "Signature Algorithm:",
+        "Issuer: C=AU, ST=Some-State, O=Internet Widgits Pty Ltd\n",
+        "Subject: C=AU, ST=Some-State, O=Internet Widgits Pty Ltd, CN=foobar.com\n",
+        "Subject Public Key Info:",
+    ];
+
+    let text = String::from_utf8(cert.to_text().unwrap()).unwrap();
+
+    for substring in SUBSTRINGS {
+        assert!(
+            text.contains(substring),
+            "{:?} not found inside {}",
+            substring,
+            text
+        );
+    }
+}