ppccap.c: Split out algorithm-specific functions

Fixes #13336

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15828)

2 files changed, 48 insertions, 1 deletions

diff --git a/crypto/poly1305/build.info b/crypto/poly1305/build.info
index 7e055ef338..7f13fdcf3b 100644
--- a/crypto/poly1305/build.info
+++ b/crypto/poly1305/build.info
@@ -16,7 +16,7 @@ IF[{- !$disabled{asm} -}]
   $POLY1305ASM_armv4=poly1305-armv4.S
   $POLY1305ASM_aarch64=poly1305-armv8.S
 
-  $POLY1305ASM_ppc32=poly1305-ppc.s poly1305-ppcfp.s
+  $POLY1305ASM_ppc32=poly1305_ppc.c poly1305-ppc.s poly1305-ppcfp.s
   $POLY1305ASM_ppc64=$POLY1305ASM_ppc32
 
   $POLY1305ASM_c64xplus=poly1305-c64xplus.s
diff --git a/crypto/poly1305/poly1305_ppc.c b/crypto/poly1305/poly1305_ppc.c
new file mode 100644
index 0000000000..4e4e3d1994
--- /dev/null
+++ b/crypto/poly1305/poly1305_ppc.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2009-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+#include <openssl/types.h>
+#include "crypto/poly1305.h"
+#include "crypto/ppc_arch.h"
+
+void poly1305_init_int(void *ctx, const unsigned char key[16]);
+void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len,
+                         unsigned int padbit);
+void poly1305_emit(void *ctx, unsigned char mac[16],
+                       const unsigned int nonce[4]);
+void poly1305_init_fpu(void *ctx, const unsigned char key[16]);
+void poly1305_blocks_fpu(void *ctx, const unsigned char *inp, size_t len,
+                         unsigned int padbit);
+void poly1305_emit_fpu(void *ctx, unsigned char mac[16],
+                       const unsigned int nonce[4]);
+void poly1305_init_vsx(void *ctx, const unsigned char key[16]);
+void poly1305_blocks_vsx(void *ctx, const unsigned char *inp, size_t len,
+                         unsigned int padbit);
+void poly1305_emit_vsx(void *ctx, unsigned char mac[16],
+                       const unsigned int nonce[4]);
+int poly1305_init(void *ctx, const unsigned char key[16], void *func[2]);
+int poly1305_init(void *ctx, const unsigned char key[16], void *func[2])
+{
+    if (OPENSSL_ppccap_P & PPC_CRYPTO207) {
+        poly1305_init_int(ctx, key);
+        func[0] = (void*)(uintptr_t)poly1305_blocks_vsx;
+        func[1] = (void*)(uintptr_t)poly1305_emit;
+    } else if (sizeof(size_t) == 4 && (OPENSSL_ppccap_P & PPC_FPU)) {
+        poly1305_init_fpu(ctx, key);
+        func[0] = (void*)(uintptr_t)poly1305_blocks_fpu;
+        func[1] = (void*)(uintptr_t)poly1305_emit_fpu;
+    } else {
+        poly1305_init_int(ctx, key);
+        func[0] = (void*)(uintptr_t)poly1305_blocks;
+        func[1] = (void*)(uintptr_t)poly1305_emit;
+    }
+    return 1;
+}