Add the function openssl_ctx_get_concrete()

This adds the ability to take an OPENSSL_CTX parameter and either return it
as is (unchanged), or if it is NULL return a pointer to the default ctx.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9040)

1 files changed, 2 insertions, 0 deletions

diff --git a/include/internal/cryptlib.h b/include/internal/cryptlib.h
index d76f9e1704..025e1acdfe 100644
--- a/include/internal/cryptlib.h
+++ b/include/internal/cryptlib.h
@@ -156,6 +156,8 @@ typedef struct openssl_ctx_method {
     void (*free_func)(void *);
 } OPENSSL_CTX_METHOD;
 
+OPENSSL_CTX *openssl_ctx_get_concrete(OPENSSL_CTX *ctx);
+
 /* Functions to retrieve pointers to data by index */
 void *openssl_ctx_get_data(OPENSSL_CTX *, int /* index */,
                            const OPENSSL_CTX_METHOD * ctx);