From 7a3ccabbaf41a330cdbdad4cc02fb5b931c44951 Mon Sep 17 00:00:00 2001
From: chromatic <chromatic@wgz.org>
Date: Thu, 28 Nov 2024 22:56:05 -0800
Subject: [PATCH] Fix {be,le}2{enc,dec} includes

Use autoconf probes to see if they're available, and fall back to compat
versions in src/compat/endian.h otherwise.
---
 configure.ac          |  2 +-
 src/compat/endian.h   | 40 ++++++++++++++++++++++++++++++++++++++++
 src/crypto/scrypt.cpp | 19 +------------------
 src/crypto/scrypt.h   | 18 +-----------------
 4 files changed, 43 insertions(+), 36 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0200117f67e..73cdfe0e797 100644
--- a/configure.ac
+++ b/configure.ac
@@ -602,7 +602,7 @@ AC_CHECK_DECLS([strnlen])
 # Check for daemon(3), unrelated to --with-daemon (although used by it)
 AC_CHECK_DECLS([daemon])
 
-AC_CHECK_DECLS([le16toh, le32toh, le64toh, htole16, htole32, htole64, be16toh, be32toh, be64toh, htobe16, htobe32, htobe64],,,
+AC_CHECK_DECLS([le16toh, le32toh, le64toh, htole16, htole32, htole64, be16toh, be32toh, be64toh, htobe16, htobe32, htobe64, be32dec, be32enc, le32dec, le32enc],,,
 		[#if HAVE_ENDIAN_H
                  #include <endian.h>
                  #elif HAVE_SYS_ENDIAN_H
diff --git a/src/compat/endian.h b/src/compat/endian.h
index 79d6b2fdbb2..996c3a4436b 100644
--- a/src/compat/endian.h
+++ b/src/compat/endian.h
@@ -191,6 +191,46 @@ inline uint64_t le64toh(uint64_t little_endian_64bits)
 }
 #endif // HAVE_DECL_LE64TOH
 
+#if HAVE_DECL_BE32DEC == 0
+static inline uint32_t be32dec(const void *pp)
+{
+    const uint8_t *p = (uint8_t const *)pp;
+    return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
+        ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
+}
+#endif // HAVE_DECL_BE32DEC
+
+#if HAVE_DECL_BE32ENC == 0
+static inline void be32enc(void *pp, uint32_t x)
+{
+    uint8_t *p = (uint8_t *)pp;
+    p[3] = x & 0xff;
+    p[2] = (x >> 8) & 0xff;
+    p[1] = (x >> 16) & 0xff;
+    p[0] = (x >> 24) & 0xff;
+}
+#endif // HAVE_DECL_BE32ENC
+
+#if HAVE_DECL_LE32DEC == 0
+static inline uint32_t le32dec(const void *pp)
+{
+        const uint8_t *p = (uint8_t const *)pp;
+        return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
+            ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
+}
+#endif // HAVE_DECL_LE32DEC
+
+#if HAVE_DECL_LE32ENC == 0
+static inline void le32enc(void *pp, uint32_t x)
+{
+        uint8_t *p = (uint8_t *)pp;
+        p[0] = x & 0xff;
+        p[1] = (x >> 8) & 0xff;
+        p[2] = (x >> 16) & 0xff;
+        p[3] = (x >> 24) & 0xff;
+}
+#endif // HAVE_DECL_LE32ENC
+
 #endif // WORDS_BIGENDIAN
 
 #endif // BITCOIN_COMPAT_ENDIAN_H
diff --git a/src/crypto/scrypt.cpp b/src/crypto/scrypt.cpp
index 60781611208..0969f2afd1e 100644
--- a/src/crypto/scrypt.cpp
+++ b/src/crypto/scrypt.cpp
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
+#include "compat/endian.h"
 
 #if defined(USE_SSE2) && !defined(USE_SSE2_ALWAYS)
 #ifdef _MSC_VER
@@ -43,24 +44,6 @@
 #endif
 #endif
 
-#ifndef __FreeBSD__
-static inline uint32_t be32dec(const void *pp)
-{
-	const uint8_t *p = (uint8_t const *)pp;
-	return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
-	    ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
-}
-
-static inline void be32enc(void *pp, uint32_t x)
-{
-	uint8_t *p = (uint8_t *)pp;
-	p[3] = x & 0xff;
-	p[2] = (x >> 8) & 0xff;
-	p[1] = (x >> 16) & 0xff;
-	p[0] = (x >> 24) & 0xff;
-}
-
-#endif
 /**
  * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
  * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
diff --git a/src/crypto/scrypt.h b/src/crypto/scrypt.h
index 8552efe17be..d21ebfa3327 100644
--- a/src/crypto/scrypt.h
+++ b/src/crypto/scrypt.h
@@ -7,6 +7,7 @@
 #define BITCOIN_CRYPTO_SCRYPT_H
 #include <stdlib.h>
 #include <stdint.h>
+#include "compat/endian.h"
 
 #if defined(HAVE_CONFIG_H)
 #include "bitcoin-config.h" // for USE_SSE2
@@ -36,21 +37,4 @@ void
 PBKDF2_SHA256(const uint8_t *passwd, size_t passwdlen, const uint8_t *salt,
     size_t saltlen, uint64_t c, uint8_t *buf, size_t dkLen);
 
-#ifndef __FreeBSD__
-static inline uint32_t le32dec(const void *pp)
-{
-        const uint8_t *p = (uint8_t const *)pp;
-        return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) +
-            ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24));
-}
-
-static inline void le32enc(void *pp, uint32_t x)
-{
-        uint8_t *p = (uint8_t *)pp;
-        p[0] = x & 0xff;
-        p[1] = (x >> 8) & 0xff;
-        p[2] = (x >> 16) & 0xff;
-        p[3] = (x >> 24) & 0xff;
-}
-#endif
 #endif // BITCOIN_CRYPTO_SCRYPT_H