X509_VERIFY_PARAM_set_flags.pod: fix doc of NULL param to X509_VERIFY_PARAM_set1_emai...

Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
MergeDate: Thu Jan  8 09:56:15 2026
(Merged from https://github.com/openssl/openssl/pull/29150)

diff --git a/doc/man3/X509_VERIFY_PARAM_set_flags.pod b/doc/man3/X509_VERIFY_PARAM_set_flags.pod
index 81f4af3a8179a24716538197df88968fb9d44bc2..f6634bb81e0bdb63e7f03491b87d6293ca5cceb8 100644 (file)
--- a/doc/man3/X509_VERIFY_PARAM_set_flags.pod
+++ b/doc/man3/X509_VERIFY_PARAM_set_flags.pod
@@ -148,7 +148,7 @@ X509_VERIFY_PARAM_set1_host() sets in I<param> the expected
 DNS hostname to I<name>, clearing any previously specified hostname.
 If I<name> is NULL or the empty string, the list of hostnames is cleared
 and hostname checks are not performed on the peer certificate.
-If I<name> is NUL-terminated, I<namelen> may be zero,
+If I<namelen> is zero, I<name> must be NUL-terminated,
 otherwise I<namelen> must be set to the length of I<name>.
 
 When a hostname is specified,
@@ -196,7 +196,9 @@ the return value.
 X509_VERIFY_PARAM_get0_email() returns the expected RFC822 email address.
 
 X509_VERIFY_PARAM_set1_email() sets the expected RFC822 email address to
-I<email>.  If I<email> is NUL-terminated, I<emaillen> may be zero, otherwise
+I<email>.
+If I<email> is NULL, email checking is disabled. Otherwise,
+if I<emaillen> is zero, I<email> must be NUL-terminated; if I<emaillen> is nonzero,
 I<emaillen> must be set to the length of I<email>.  When an email address
 is specified, certificate verification automatically invokes
 L<X509_check_email(3)>.
@@ -205,13 +207,14 @@ X509_VERIFY_PARAM_get1_ip_asc() returns the expected IP address as a string.
 The caller is responsible for freeing it.
 
 X509_VERIFY_PARAM_set1_ip() sets the expected IP address to I<ip>.
-The I<ip> argument is in binary format, in network byte-order and
+If I<ip> is NULL, IP address checking is disabled. Otherwise,
+the I<ip> argument must be in binary format, in network byte-order and
 I<iplen> must be set to 4 for IPv4 and 16 for IPv6.  When an IP
 address is specified, certificate verification automatically invokes
 L<X509_check_ip(3)>.
 
 X509_VERIFY_PARAM_set1_ip_asc() sets the expected IP address to
-I<ipasc>.  The I<ipasc> argument is a NUL-terminal ASCII string:
+I<ipasc>.  The I<ipasc> argument must be a NUL-terminated ASCII string:
 dotted decimal quad for IPv4 and colon-separated hexadecimal for
 IPv6.  The condensed "::" notation is supported for IPv6 addresses.