Replace GHASH_ASM with function specific defines.

Use the same pattern that is now used for most other code - provide HAVE_*
defines for functions and use these to selectively enable source code.

11 files changed, 41 insertions, 22 deletions

diff --git a/src/lib/libcrypto/arch/alpha/Makefile.inc b/src/lib/libcrypto/arch/alpha/Makefile.inc
index 1073ac3c1e..d89f32dc9d 100644
--- a/src/lib/libcrypto/arch/alpha/Makefile.inc
+++ b/src/lib/libcrypto/arch/alpha/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.15 2025/02/14 12:01:58 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.16 2026/01/17 14:30:37 jsing Exp $
 
 # alpha-specific libcrypto build rules
 
@@ -6,7 +6,6 @@
 SSLASM+= bn alpha-mont
 CFLAGS+= -DOPENSSL_BN_ASM_MONT
 # modes
-CFLAGS+= -DGHASH_ASM
 SSLASM+= modes ghash-alpha
 # sha
 SSLASM+= sha sha1-alpha
diff --git a/src/lib/libcrypto/arch/alpha/crypto_arch.h b/src/lib/libcrypto/arch/alpha/crypto_arch.h
index 1d553b7e07..8fec3e2855 100644
--- a/src/lib/libcrypto/arch/alpha/crypto_arch.h
+++ b/src/lib/libcrypto/arch/alpha/crypto_arch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_arch.h,v 1.2 2025/02/14 12:01:58 jsing Exp $ */
+/*      $OpenBSD: crypto_arch.h,v 1.3 2026/01/17 14:30:37 jsing Exp $ */
 /*
  * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
  *
@@ -18,7 +18,14 @@
 #ifndef HEADER_CRYPTO_ARCH_H
 #define HEADER_CRYPTO_ARCH_H
 
+#ifndef OPENSSL_NO_ASM
+
+#define HAVE_GCM_GHASH_4BIT
+#define HAVE_GCM_GMULT_4BIT
+
 #define HAVE_SHA1_BLOCK_DATA_ORDER
 #define HAVE_SHA1_BLOCK_GENERIC
 
 #endif
+
+#endif
diff --git a/src/lib/libcrypto/arch/amd64/Makefile.inc b/src/lib/libcrypto/arch/amd64/Makefile.inc
index 27c61edf58..49f2f6e627 100644
--- a/src/lib/libcrypto/arch/amd64/Makefile.inc
+++ b/src/lib/libcrypto/arch/amd64/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.43 2026/01/17 13:55:30 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.44 2026/01/17 14:30:37 jsing Exp $
 
 # amd64-specific libcrypto build rules
 
@@ -48,7 +48,6 @@ CFLAGS+= -DMD5_ASM
 SRCS+= md5_amd64_generic.S
 
 # modes
-CFLAGS+= -DGHASH_ASM
 SSLASM+= modes ghash-x86_64
 SRCS += gcm128_amd64.c
 
diff --git a/src/lib/libcrypto/arch/amd64/crypto_arch.h b/src/lib/libcrypto/arch/amd64/crypto_arch.h
index 9a179a571e..fdc17b8110 100644
--- a/src/lib/libcrypto/arch/amd64/crypto_arch.h
+++ b/src/lib/libcrypto/arch/amd64/crypto_arch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_arch.h,v 1.15 2025/09/08 12:56:17 jsing Exp $ */
+/*      $OpenBSD: crypto_arch.h,v 1.16 2026/01/17 14:30:37 jsing Exp $ */
 /*
  * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
  *
@@ -49,6 +49,8 @@ extern uint64_t crypto_cpu_caps_amd64;
 #define HAVE_AES_XTS_ENCRYPT_INTERNAL
 
 #define HAVE_GCM128_INIT
+#define HAVE_GCM_GHASH_4BIT
+#define HAVE_GCM_GMULT_4BIT
 
 #define HAVE_RC4_INTERNAL
 #define HAVE_RC4_SET_KEY_INTERNAL
diff --git a/src/lib/libcrypto/arch/hppa/Makefile.inc b/src/lib/libcrypto/arch/hppa/Makefile.inc
index ebcc4c8208..4244c20fef 100644
--- a/src/lib/libcrypto/arch/hppa/Makefile.inc
+++ b/src/lib/libcrypto/arch/hppa/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.28 2026/01/17 13:55:30 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.29 2026/01/17 14:30:37 jsing Exp $
 
 # hppa-specific libcrypto build rules
 
@@ -8,7 +8,6 @@ SSLASM+= aes aes-parisc aes-parisc
 SSLASM+= bn parisc-mont parisc-mont
 CFLAGS+= -DOPENSSL_BN_ASM_MONT
 # modes
-CFLAGS+= -DGHASH_ASM
 SSLASM+= modes ghash-parisc ghash-parisc
 # sha
 SSLASM+= sha sha1-parisc sha1-parisc
diff --git a/src/lib/libcrypto/arch/hppa/crypto_arch.h b/src/lib/libcrypto/arch/hppa/crypto_arch.h
index 08fcaca045..80260c93e7 100644
--- a/src/lib/libcrypto/arch/hppa/crypto_arch.h
+++ b/src/lib/libcrypto/arch/hppa/crypto_arch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_arch.h,v 1.2 2025/02/14 12:01:58 jsing Exp $ */
+/*      $OpenBSD: crypto_arch.h,v 1.3 2026/01/17 14:30:37 jsing Exp $ */
 /*
  * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
  *
@@ -23,6 +23,9 @@
 #define HAVE_AES_ENCRYPT_INTERNAL
 #define HAVE_AES_DECRYPT_INTERNAL
 
+#define HAVE_GCM_GHASH_4BIT
+#define HAVE_GCM_GMULT_4BIT
+
 #define HAVE_SHA1_BLOCK_DATA_ORDER
 #define HAVE_SHA1_BLOCK_GENERIC
 
diff --git a/src/lib/libcrypto/arch/i386/Makefile.inc b/src/lib/libcrypto/arch/i386/Makefile.inc
index d0c1aeea6a..18d316e64d 100644
--- a/src/lib/libcrypto/arch/i386/Makefile.inc
+++ b/src/lib/libcrypto/arch/i386/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.32 2026/01/17 13:55:30 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.33 2026/01/17 14:30:37 jsing Exp $
 
 # i386-specific libcrypto build rules
 
@@ -23,7 +23,6 @@ CFLAGS+= -DMD5_ASM
 SSLASM+= md5 md5-586
 
 # modes
-CFLAGS+= -DGHASH_ASM
 SSLASM+= modes ghash-x86
 SRCS += gcm128_i386.c
 
diff --git a/src/lib/libcrypto/arch/i386/crypto_arch.h b/src/lib/libcrypto/arch/i386/crypto_arch.h
index f0e9e4c065..143dce6ce0 100644
--- a/src/lib/libcrypto/arch/i386/crypto_arch.h
+++ b/src/lib/libcrypto/arch/i386/crypto_arch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_arch.h,v 1.14 2025/12/31 10:06:41 jsing Exp $ */
+/*      $OpenBSD: crypto_arch.h,v 1.15 2026/01/17 14:30:37 jsing Exp $ */
 /*
  * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
  *
@@ -49,6 +49,8 @@ extern uint64_t crypto_cpu_caps_i386;
 #define HAVE_AES_XTS_ENCRYPT_INTERNAL
 
 #define HAVE_GCM128_INIT
+#define HAVE_GCM_GHASH_4BIT
+#define HAVE_GCM_GMULT_4BIT
 
 #define HAVE_RC4_INTERNAL
 #define HAVE_RC4_SET_KEY_INTERNAL
diff --git a/src/lib/libcrypto/arch/sparc64/Makefile.inc b/src/lib/libcrypto/arch/sparc64/Makefile.inc
index f09a9769a9..2343b3b3e2 100644
--- a/src/lib/libcrypto/arch/sparc64/Makefile.inc
+++ b/src/lib/libcrypto/arch/sparc64/Makefile.inc
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile.inc,v 1.22 2026/01/17 13:55:31 jsing Exp $
+# $OpenBSD: Makefile.inc,v 1.23 2026/01/17 14:30:37 jsing Exp $
 
 # sparc64-specific libcrypto build rules
 
@@ -6,7 +6,6 @@
 SSLASM+= aes aes-sparcv9 aes-sparcv9
 # bn
 # modes
-CFLAGS+= -DGHASH_ASM
 SSLASM+= modes ghash-sparcv9 ghash-sparcv9
 # sha
 SSLASM+= sha sha1-sparcv9 sha1-sparcv9
diff --git a/src/lib/libcrypto/arch/sparc64/crypto_arch.h b/src/lib/libcrypto/arch/sparc64/crypto_arch.h
index 251957a5bc..405f1c3657 100644
--- a/src/lib/libcrypto/arch/sparc64/crypto_arch.h
+++ b/src/lib/libcrypto/arch/sparc64/crypto_arch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: crypto_arch.h,v 1.2 2025/02/14 12:01:58 jsing Exp $ */
+/*      $OpenBSD: crypto_arch.h,v 1.3 2026/01/17 14:30:37 jsing Exp $ */
 /*
  * Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
  *
@@ -23,6 +23,9 @@
 #define HAVE_AES_ENCRYPT_INTERNAL
 #define HAVE_AES_DECRYPT_INTERNAL
 
+#define HAVE_GCM_GHASH_4BIT
+#define HAVE_GCM_GMULT_4BIT
+
 #define HAVE_SHA1_BLOCK_DATA_ORDER
 #define HAVE_SHA1_BLOCK_GENERIC
 
diff --git a/src/lib/libcrypto/modes/gcm128.c b/src/lib/libcrypto/modes/gcm128.c
index b6874296e0..a88f589b00 100644
--- a/src/lib/libcrypto/modes/gcm128.c
+++ b/src/lib/libcrypto/modes/gcm128.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: gcm128.c,v 1.54 2025/06/28 12:39:10 jsing Exp $ */
+/* $OpenBSD: gcm128.c,v 1.55 2026/01/17 14:30:37 jsing Exp $ */
 /* ====================================================================
  * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
  *
@@ -52,6 +52,7 @@
 
 #include <openssl/crypto.h>
 
+#include "crypto_arch.h"
 #include "crypto_internal.h"
 #include "modes_local.h"
 
@@ -84,17 +85,17 @@ gcm_init_4bit(u128 Htable[16], uint64_t H[2])
         }
 }
 
-#ifdef GHASH_ASM
-void gcm_gmult_4bit(uint64_t Xi[2], const u128 Htable[16]);
-void gcm_ghash_4bit(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp,
-    size_t len);
-
-#else
+#if !defined(HAVE_GCM_GHASH_4BIT) && !defined(HAVE_GCM_GMULT_4BIT)
 static const uint16_t rem_4bit[16] = {
         0x0000, 0x1c20, 0x3840, 0x2460, 0x7080, 0x6ca0, 0x48c0, 0x54e0,
         0xe100, 0xfd20, 0xd940, 0xc560, 0x9180, 0x8da0, 0xa9c0, 0xb5e0,
 };
+#endif
+
+#ifdef HAVE_GCM_GMULT_4BIT
+void gcm_gmult_4bit(uint64_t Xi[2], const u128 Htable[16]);
 
+#else
 static void
 gcm_gmult_4bit(uint64_t Xi[2], const u128 Htable[16])
 {
@@ -135,7 +136,13 @@ gcm_gmult_4bit(uint64_t Xi[2], const u128 Htable[16])
         Xi[0] = htobe64(Z.hi);
         Xi[1] = htobe64(Z.lo);
 }
+#endif
 
+#ifdef HAVE_GCM_GHASH_4BIT
+void gcm_ghash_4bit(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp,
+    size_t len);
+
+#else
 static void
 gcm_ghash_4bit(uint64_t Xi[2], const u128 Htable[16],
     const uint8_t *inp, size_t len)