Use CRIOGET to fetch a crypto descriptor when present.

FreeBSD's current /dev/crypto implementation requires that consumers
clone a separate file descriptor via the CRIOGET ioctl that can then
be used with other ioctls such as CIOCGSESSION.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(cherry picked from commit b39c215decf6e68c28cb64dcfaf5ae5a7e8d35b4)

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13853)

diff --git a/crypto/engine/eng_devcrypto.c b/crypto/engine/eng_devcrypto.c
index 49e9ce1af33b095418af7db019f297cdc0c8f885..f03c017181323fb8dd282453fdf930de288d3cc1 100644 (file)
--- a/crypto/engine/eng_devcrypto.c
+++ b/crypto/engine/eng_devcrypto.c
@@ -758,8 +758,9 @@ static int devcrypto_unload(ENGINE *e)
 void engine_load_devcrypto_int()
 {
     ENGINE *e = NULL;
+    int fd;
 
-    if ((cfd = open("/dev/crypto", O_RDWR, 0)) < 0) {
+    if ((fd = open("/dev/crypto", O_RDWR, 0)) < 0) {
 #ifndef ENGINE_DEVCRYPTO_DEBUG
         if (errno != ENOENT)
 #endif
@@ -767,6 +768,16 @@ void engine_load_devcrypto_int()
         return;
     }
 
+#ifdef CRIOGET
+    if (ioctl(fd, CRIOGET, &cfd) < 0) {
+        fprintf(stderr, "Could not create crypto fd: %s\n", strerror(errno));
+        cfd = -1;
+        return;
+    }
+#else
+    cfd = fd;
+#endif
+
     if ((e = ENGINE_new()) == NULL
         || !ENGINE_set_destroy_function(e, devcrypto_unload)) {
         ENGINE_free(e);