fix function pointer type mismatch in OCSP_REQUEST/RESPONSE bio macros

d2i_OCSP_REQUEST/d2i_OCSP_RESPONSE are declared with type-specific
signatures returning OCSP_REQUEST*/OCSP_RESPONSE*, but the
d2i_OCSP_{REQUEST,RESPONSE}_bio macros routed them through
ASN1_d2i_bio_of -> ASN1_d2i_bio, which calls them via a
d2i_of_void* pointer:

    void *(*)(void **, const unsigned char **, long)

The analogous i2d_OCSP_{REQUEST,RESPONSE}_bio macros did the same
through ASN1_i2d_bio_of -> ASN1_i2d_bio with i2d_of_void*.

Rewrite the macros to dispatch through
ASN1_item_d2i_bio/ASN1_item_i2d_bio with ASN1_ITEM_rptr(OCSP_*)
directly. This eliminates the function-pointer cast entirely; both old
and new paths bottom out in the same ASN1_item_d2i_ex / ASN1_item_i2d
call, so behavior is identical.

Signed-off-by: Nikola Pajkovsky <nikolap@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Milan Broz <mbroz@openssl.org>
MergeDate: Thu Jun 25 12:12:50 2026
(Merged from https://github.com/openssl/openssl/pull/31523)

diff --git a/include/openssl/ocsp.h.in b/include/openssl/ocsp.h.in
index 86ed7f58695e87ce0325113ba9405ab6c212ccf2..ce33a4d8fc1587c76aba209aabc29fc873f9474c 100644 (file)
--- a/include/openssl/ocsp.h.in
+++ b/include/openssl/ocsp.h.in
@@ -144,9 +144,13 @@ typedef struct ocsp_service_locator_st OCSP_SERVICELOC;
 #define PEM_STRING_OCSP_REQUEST "OCSP REQUEST"
 #define PEM_STRING_OCSP_RESPONSE "OCSP RESPONSE"
 
-#define d2i_OCSP_REQUEST_bio(bp, p) ASN1_d2i_bio_of(OCSP_REQUEST, OCSP_REQUEST_new, d2i_OCSP_REQUEST, bp, p)
+#define d2i_OCSP_REQUEST_bio(bp, p)                                  \
+    ((OCSP_REQUEST *)ASN1_item_d2i_bio(ASN1_ITEM_rptr(OCSP_REQUEST), \
+        (bp), CHECKED_PPTR_OF(OCSP_REQUEST, p)))
 
-#define d2i_OCSP_RESPONSE_bio(bp, p) ASN1_d2i_bio_of(OCSP_RESPONSE, OCSP_RESPONSE_new, d2i_OCSP_RESPONSE, bp, p)
+#define d2i_OCSP_RESPONSE_bio(bp, p)                                   \
+    ((OCSP_RESPONSE *)ASN1_item_d2i_bio(ASN1_ITEM_rptr(OCSP_RESPONSE), \
+        (bp), CHECKED_PPTR_OF(OCSP_RESPONSE, p)))
 
 #define PEM_read_bio_OCSP_REQUEST(bp, x, cb) (OCSP_REQUEST *)PEM_ASN1_read_bio( \
     (d2i_of_void *)d2i_OCSP_REQUEST, PEM_STRING_OCSP_REQUEST,                   \
@@ -164,9 +168,13 @@ typedef struct ocsp_service_locator_st OCSP_SERVICELOC;
     PEM_ASN1_write_bio((i2d_of_void *)i2d_OCSP_RESPONSE, PEM_STRING_OCSP_RESPONSE, \
         bp, (char *)(o), NULL, NULL, 0, NULL, NULL)
 
-#define i2d_OCSP_RESPONSE_bio(bp, o) ASN1_i2d_bio_of(OCSP_RESPONSE, i2d_OCSP_RESPONSE, bp, o)
+#define i2d_OCSP_RESPONSE_bio(bp, o)                 \
+    ASN1_item_i2d_bio(ASN1_ITEM_rptr(OCSP_RESPONSE), \
+        (bp), CHECKED_PTR_OF(const OCSP_RESPONSE, o))
 
-#define i2d_OCSP_REQUEST_bio(bp, o) ASN1_i2d_bio_of(OCSP_REQUEST, i2d_OCSP_REQUEST, bp, o)
+#define i2d_OCSP_REQUEST_bio(bp, o)                 \
+    ASN1_item_i2d_bio(ASN1_ITEM_rptr(OCSP_REQUEST), \
+        (bp), CHECKED_PTR_OF(const OCSP_REQUEST, o))
 
 #define ASN1_BIT_STRING_digest(data, type, md, len) \
     ASN1_item_digest(ASN1_ITEM_rptr(ASN1_BIT_STRING), type, data, md, len)