crypto: add Date fields for validTo and validFrom

Added equivalent fields for `x509.validFrom` and `x509.validTo` in Javascript Date form for ease of use.

doc/api/crypto.md

@@ -2875,6 +2875,18 @@ added: v15.6.0
 
 The date/time until which this certificate is valid.
 
+### `x509.validFromDate`
+
+* Type: {Date}
+
+The date/time from which this certificate is valid, encapsulated in a `Date` object.
+
+### `x509.validToDate`
+
+* Type: {Date}
+
+The date/time until which this certificate is valid, encapsulated in a `Date` object.
+
 ### `x509.verify(publicKey)`
 
 <!-- YAML

lib/internal/crypto/x509.js

@@ -135,6 +135,8 @@ class X509Certificate {
       infoAccess: this.infoAccess,
       validFrom: this.validFrom,
       validTo: this.validTo,
+      validFromDate: this.validFromDate,
+      validToDate: this.validToDate,
       fingerprint: this.fingerprint,
       fingerprint256: this.fingerprint256,
       fingerprint512: this.fingerprint512,
@@ -220,6 +222,24 @@ class X509Certificate {
     return value;
   }
 
+  get validFromDate() {
+    let value = this[kInternalState].get('validFromDate');
+    if (value === undefined) {
+      value = this[kHandle].validFromDate();
+      this[kInternalState].set('validFromDate', value);
+    }
+    return value;
+  }
+
+  get validToDate() {
+    let value = this[kInternalState].get('validToDate');
+    if (value === undefined) {
+      value = this[kHandle].validToDate();
+      this[kInternalState].set('validToDate', value);
+    }
+    return value;
+  }
+
   get fingerprint() {
     let value = this[kInternalState].get('fingerprint');
     if (value === undefined) {

src/crypto/crypto_common.cc

@@ -29,6 +29,7 @@ using v8::ArrayBuffer;
 using v8::BackingStore;
 using v8::Boolean;
 using v8::Context;
+using v8::Date;
 using v8::EscapableHandleScope;
 using v8::Integer;
 using v8::Local;
@@ -580,6 +581,20 @@ MaybeLocal<Value> GetValidFrom(
   return ToV8Value(env, bio);
 }
 
+MaybeLocal<Value> GetValidToDate(Environment* env, X509* cert) {
+  struct tm tp;
+  ASN1_TIME_to_tm(X509_get0_notAfter(cert), &tp);
+  time_t unixtime = timegm(&tp);
+  return Date::New(env->context(), unixtime * 1000.);
+}
+
+MaybeLocal<Value> GetValidFromDate(Environment* env, X509* cert) {
+  struct tm tp;
+  ASN1_TIME_to_tm(X509_get0_notBefore(cert), &tp);
+  time_t unixtime = timegm(&tp);
+  return Date::New(env->context(), unixtime * 1000.);
+}
+
 static inline bool IsSafeAltName(const char* name, size_t length, bool utf8) {
   for (size_t i = 0; i < length; i++) {
     char c = name[i];

src/crypto/crypto_common.h

@@ -113,6 +113,10 @@ v8::MaybeLocal<v8::Value> GetValidFrom(
     X509* cert,
     const BIOPointer& bio);
 
+v8::MaybeLocal<v8::Value> GetValidToDate(Environment* env, X509* cert);
+
+v8::MaybeLocal<v8::Value> GetValidFromDate(Environment* env, X509* cert);
+
 v8::MaybeLocal<v8::Value> GetFingerprintDigest(
     Environment* env,
     const EVP_MD* method,

src/crypto/crypto_x509.cc

@@ -79,6 +79,8 @@ Local<FunctionTemplate> X509Certificate::GetConstructorTemplate(
     SetProtoMethod(isolate, tmpl, "issuer", Issuer);
     SetProtoMethod(isolate, tmpl, "validTo", ValidTo);
     SetProtoMethod(isolate, tmpl, "validFrom", ValidFrom);
+    SetProtoMethod(isolate, tmpl, "validToDate", ValidToDate);
+    SetProtoMethod(isolate, tmpl, "validFromDate", ValidFromDate);
     SetProtoMethod(isolate, tmpl, "fingerprint", Fingerprint<EVP_sha1>);
     SetProtoMethod(isolate, tmpl, "fingerprint256", Fingerprint<EVP_sha256>);
     SetProtoMethod(isolate, tmpl, "fingerprint512", Fingerprint<EVP_sha512>);
@@ -249,6 +251,14 @@ static void ReturnProperty(const FunctionCallbackInfo<Value>& args) {
   if (Property(env, cert->get()).ToLocal(&ret)) args.GetReturnValue().Set(ret);
 }
 
+void X509Certificate::ValidFromDate(const FunctionCallbackInfo<Value>& args) {
+  ReturnProperty<GetValidFromDate>(args);
+}
+
+void X509Certificate::ValidToDate(const FunctionCallbackInfo<Value>& args) {
+  ReturnProperty<GetValidToDate>(args);
+}
+
 void X509Certificate::KeyUsage(const FunctionCallbackInfo<Value>& args) {
   ReturnProperty<GetKeyUsage>(args);
 }
@@ -523,6 +533,8 @@ void X509Certificate::RegisterExternalReferences(
   registry->Register(Issuer);
   registry->Register(ValidTo);
   registry->Register(ValidFrom);
+  registry->Register(ValidToDate);
+  registry->Register(ValidFromDate);
   registry->Register(Fingerprint<EVP_sha1>);
   registry->Register(Fingerprint<EVP_sha256>);
   registry->Register(Fingerprint<EVP_sha512>);

src/crypto/crypto_x509.h

@@ -79,6 +79,8 @@ class X509Certificate : public BaseObject {
   static void InfoAccess(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void ValidFrom(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void ValidTo(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void ValidFromDate(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void ValidToDate(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void KeyUsage(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void SerialNumber(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Raw(const v8::FunctionCallbackInfo<v8::Value>& args);

test/parallel/test-crypto-x509.js

@@ -96,6 +96,8 @@ const der = Buffer.from(
   assert.strictEqual(x509.infoAccess, infoAccessCheck);
   assert.strictEqual(x509.validFrom, 'Sep  3 21:40:37 2022 GMT');
   assert.strictEqual(x509.validTo, 'Jun 17 21:40:37 2296 GMT');
+  assert.deepStrictEqual(x509.validFromDate, new Date('September 3, 2022 21:40:37'));
+  assert.deepStrictEqual(x509.validToDate, new Date('June 17, 2296 21:40:37'));
   assert.strictEqual(
     x509.fingerprint,
     '8B:89:16:C4:99:87:D2:13:1A:64:94:36:38:A5:32:01:F0:95:3B:53');
@@ -359,3 +361,78 @@ UcXd/5qu2GhokrKU2cPttU+XAN2Om6a0
 
   assert.strictEqual(cert.checkIssued(cert), false);
 }
+
+{
+  // Test date parsing of `validFromDate` and `validToDate` fields, according to RFC 5280.
+
+  // Validity dates up until the year 2049 are encoded as UTCTime.
+  // The fomatting of UTCTime changes from the year ~1949 to 1950~.
+  const certPemUTCTime = `-----BEGIN CERTIFICATE-----
+MIIE/TCCAuWgAwIBAgIUHbXPaFnjeBehMvdHkXZ+E3a78QswDQYJKoZIhvcNAQEL
+BQAwDTELMAkGA1UEBhMCS1IwIBgPMTk0OTEyMjUyMzU5NThaFw01MDAxMDEyMzU5
+NThaMA0xCzAJBgNVBAYTAktSMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKC
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+UidvpWWipVLZgK+oDks+bKTobcoXGW9oXobiIYqslXPy
+-----END CERTIFICATE-----`.trim();
+  const c1 = new X509Certificate(certPemUTCTime);
+
+  assert.deepStrictEqual(c1.validFromDate, new Date('December 25, 1949 23:59:58'));
+  assert.deepStrictEqual(c1.validToDate, new Date('January 1, 1950 23:59:58'));
+
+  // The GeneralizedTime format is used for dates in 2050 or later.
+  const certPemGeneralizedTime = `-----BEGIN CERTIFICATE-----
+MIIE/TCCAuWgAwIBAgIUYHPUNd6S5xlNMjrWSaekgCBrbDQwDQYJKoZIhvcNAQEL
+BQAwDTELMAkGA1UEBhMCS1IwIBcNNDkxMjI2MDAwMDAxWhgPMjA1MDAxMDIwMDAw
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+CWwQO8JZjJqFtqtuzy2n+gLCvqePgG/gmSqHOPm2ZbLW
+-----END CERTIFICATE-----`.trim();
+  const c2 = new X509Certificate(certPemGeneralizedTime);
+
+  assert.deepStrictEqual(c2.validFromDate, new Date('December 26, 2049 00:00:01'));
+  assert.deepStrictEqual(c2.validToDate, new Date('January 2, 2050 00:00:01'));
+}