pe-binary: drop pe_hash() and friends when OpenSSL support is disabled

These three functions are currently only used by sbsign, which requires
OpenSSL. Moreover, pe_hash() and uki_hash() anyway do not work if
OpenSSL is disabled. Let's only declare them when OpenSSL support is
enabled.

src/shared/pe-binary.h

@@ -151,8 +151,11 @@ bool pe_is_addon(const PeHeader *pe_header, const IMAGE_SECTION_HEADER *sections
 bool pe_is_native(const PeHeader *pe_header);
 int pe_is_native_fd(int fd);
 
+#if HAVE_OPENSSL
 int pe_hash(int fd, const EVP_MD *md, void **ret_hash, size_t *ret_hash_size);
 
+/* This does not depend on OpenSSL, but is currently only used by sbsign which requires OpenSSL. */
 int pe_checksum(int fd, uint32_t *ret);
 
 int uki_hash(int fd, const EVP_MD *md, void *ret_hashes[static _UNIFIED_SECTION_MAX], size_t *ret_hash_size);
+#endif