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[PATCH 3/4] imap-send: remove two string length checks

From
Beat Bolli <dev+git@drbeat.li>
Date
Mar 11, 2026, 12:11 UTC
Message-ID
<20260311121107.1122387-4-dev+git@drbeat.li>
In-Reply-To
<20260311121107.1122387-1-dev+git@drbeat.li>

At this point, these two checks verify that the ASN1_STRINGs are internally consistent. This may have been ok when the fields were accessed directly, but now that the API is used, is unnecessary.

Remove the two checks.
Signed-off-by: Beat Bolli <dev+git@drbeat.li>
---
 imap-send.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/imap-send.c b/imap-send.c
index 2a904314dd..2bb0003f08 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -253,8 +253,6 @@ static int verify_hostname(X509 *cert, const char *hostname)
 			ASN1_STRING *subj_alt_str = GENERAL_NAME_get0_value(subj_alt_name, &ntype);
 
 			if (ntype == GEN_DNS &&
-			    strlen((const char *)ASN1_STRING_get0_data(subj_alt_str)) ==
-				    ASN1_STRING_length(subj_alt_str) &&
 			    host_matches(hostname, (const char *)ASN1_STRING_get0_data(subj_alt_str)))
 				found = 1;
 		}
@@ -270,8 +268,7 @@ static int verify_hostname(X509 *cert, const char *hostname)
 	    (cname_entry = X509_NAME_get_entry(subj, i)) == NULL ||
 	    (cname = X509_NAME_ENTRY_get_data(cname_entry)) == NULL)
 		return error("cannot get certificate common name");
-	if (strlen((const char *)ASN1_STRING_get0_data(cname)) == ASN1_STRING_length(cname) &&
-	    host_matches(hostname, (const char *)ASN1_STRING_get0_data(cname)))
+	if (host_matches(hostname, (const char *)ASN1_STRING_get0_data(cname)))
 		return 0;
 	return error("certificate owner '%s' does not match hostname '%s'",
 		     ASN1_STRING_get0_data(cname), hostname);
-- 
2.51.0
Previous: Beat BolliNext: Oswald Buddenhagen
Message 2 of 14 in “imap-send: modernize the OpenSSL API”
  1. 0/4 imap-send: modernize the OpenSSL APIBeat Bolli, Mar 11, 2026
  2. 3/4 imap-send: remove two string length checksBeat Bolli, Mar 11, 2026
  3. Oswald BuddenhagenMar 11, 2026
  4. Beat BolliMar 11, 2026
  5. Junio C HamanoMar 11, 2026
  6. Beat BolliMar 11, 2026
  7. 4/4 imap-send: refactor function host_matches()Beat Bolli, Mar 11, 2026
  8. 2/4 imap-send: use the OpenSSL API to access the subject common nameBeat Bolli, Mar 11, 2026
  9. 1/4 imap-send: use the OpenSSL API to access the subject alternative namesBeat Bolli, Mar 11, 2026
  10. 1/3 imap-send: use the OpenSSL API to access the subject alternative namesBeat Bolli, Mar 11, 2026
  11. 0/3 imap-send: modernize the OpenSSL APIBeat Bolli, Mar 11, 2026
  12. Junio C HamanoMar 12, 2026
  13. 3/3 imap-send: move common code into function host_matches()Beat Bolli, Mar 11, 2026
  14. 2/3 imap-send: use the OpenSSL API to access the subject common nameBeat Bolli, Mar 11, 2026

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