Stop using `libc::time_t`

This type was used for the calculation of the certificate's expiration
delay, which causes troubles on some 32 bits systems.
Rel #59

CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - An invalid reference in the command line arguments has been fixed.
 - Some missing file path in log messages has been added.
+- The calculation of the certificate's expiration delay does no longer break compilation on some systems.
 
 
 ## [0.19.0] - 2022-04-17

acme_common/Cargo.toml

@@ -24,7 +24,6 @@ base64 = "0.13"
 daemonize = "0.4"
 env_logger = "0.9"
 glob = "0.3"
-libc = "0.2"
 log = "0.4"
 native-tls = "0.2"
 openssl = { version = "0.10", optional = true }

acme_common/src/crypto/openssl_certificate.rs

@@ -10,7 +10,7 @@ use openssl::x509::extension::{BasicConstraints, SubjectAlternativeName};
 use openssl::x509::{X509Builder, X509Extension, X509NameBuilder, X509Req, X509ReqBuilder, X509};
 use std::collections::{HashMap, HashSet};
 use std::net::IpAddr;
-use std::time::{Duration, SystemTime, UNIX_EPOCH};
+use std::time::Duration;
 
 fn get_digest(digest: HashFunction, key_pair: &KeyPair) -> MessageDigest {
     #[cfg(not(any(ed25519, ed448)))]
@@ -109,8 +109,7 @@ impl X509Certificate {
     }
 
     pub fn expires_in(&self) -> Result<Duration, Error> {
-        let timestamp = SystemTime::now().duration_since(UNIX_EPOCH)?.as_secs() as libc::time_t;
-        let now = Asn1Time::from_unix(timestamp)?;
+        let now = Asn1Time::days_from_now(0)?;
         let not_after = self.inner_cert.not_after();
         let diff = now.diff(not_after)?;
         let nb_secs = diff.days * 24 * 60 * 60 + diff.secs;