fix https://github.com/acmesh-official/acme.sh/issues/3870

acme.sh

@@ -1272,9 +1272,17 @@ _createcsr() {
   _csr_cn="$(_idn "$domain")"
   _debug2 _csr_cn "$_csr_cn"
   if _contains "$(uname -a)" "MINGW"; then
-    ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "//CN=$_csr_cn" -config "$csrconf" -out "$csr"
+    if _isIP "$_csr_cn"; then
+      ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "//O=$PROJECT_NAME" -config "$csrconf" -out "$csr"
+    else
+      ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "//CN=$_csr_cn" -config "$csrconf" -out "$csr"
+    fi
   else
-    ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "/CN=$_csr_cn" -config "$csrconf" -out "$csr"
+    if _isIP "$_csr_cn"; then
+      ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "/O=$PROJECT_NAME" -config "$csrconf" -out "$csr"
+    else
+      ${ACME_OPENSSL_BIN:-openssl} req -new -sha256 -key "$csrkey" -subj "/CN=$_csr_cn" -config "$csrconf" -out "$csr"
+    fi
   fi
 }