add ssl_has_cert

Add inline function ssl_has_cert which checks to see if a certificate and
private key for a given index are not NULL.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2623)

1 files changed, 9 insertions, 0 deletions

diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index df6be646e1..23e6a67470 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -1950,6 +1950,15 @@ struct openssl_ssl_test_functions {
 
 const char *ssl_protocol_to_string(int version);
 
+/* Returns true if certificate and private key for 'idx' are present */
+static ossl_inline int ssl_has_cert(const SSL *s, int idx)
+{
+    if (idx < 0 || idx >= SSL_PKEY_NUM)
+        return 0;
+    return s->cert->pkeys[idx].x509 != NULL
+        && s->cert->pkeys[idx].privatekey != NULL;
+}
+
 # ifndef OPENSSL_UNIT_TEST
 
 void ssl_clear_cipher_ctx(SSL *s);