sk_find_ex
sk_find_ex(CHECKED_STACK_OF(type, st), \
#define sk_OPENSSL_STRING_find_ex(st, val) sk_find_ex((_STACK *)CHECKED_CONST_PTR_OF(STACK_OF(OPENSSL_STRING), st), CHECKED_CONST_PTR_OF(char, val))
#define sk_OPENSSL_BLOCK_find_ex(st, val) sk_find_ex((_STACK *)CHECKED_CONST_PTR_OF(STACK_OF(OPENSSL_BLOCK), st), CHECKED_CONST_PTR_OF(void, val))
#define sk_OPENSSL_PSTRING_find_ex(st, val) sk_find_ex((_STACK *)CHECKED_CONST_PTR_OF(STACK_OF(OPENSSL_PSTRING), st), CHECKED_CONST_PTR_OF(OPENSSL_STRING, val))
int sk_find_ex(_STACK *st, void *data);