File openssl-1_1-Fix-AES-GCM-on-Power-8-CPUs.patch of Package openssl-1_1

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File openssl-1_1-Fix-AES-GCM-on-Power-8-CPUs.patch of Package openssl-1_1 (Revision ca33c214ebbf3de090e3fe6a9d873aad)

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From 9ab6b64ac856157a31a54c0d12207c2338bfa8e2 Mon Sep 17 00:00:00 2001
From: Tomas Mraz <tomas@openssl.org>
Date: Fri, 9 Sep 2022 14:46:24 +0200
Subject: [PATCH] Fix AES-GCM on Power 8 CPUs

Properly fallback to the default implementation on CPUs
missing necessary instructions.

Fixes #19163

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19182)
---
 crypto/evp/e_aes.c |  146 ++++++++++++++++++++++++++---------------------------
 1 file changed, 74 insertions(+), 72 deletions(-)

--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -181,30 +181,16 @@ static void ctr64_inc(unsigned char *cou
 # define PPC_AES_GCM_CAPABLE (OPENSSL_ppccap_P & PPC_MADD300)
 # define AES_GCM_ENC_BYTES 128
 # define AES_GCM_DEC_BYTES 128
-# if PPC_AES_GCM_CAPABLE
 size_t ppc_aes_gcm_encrypt(const unsigned char *in, unsigned char *out,
                            size_t len, const void *key, unsigned char ivec[16],
                            u64 *Xi);
 size_t ppc_aes_gcm_decrypt(const unsigned char *in, unsigned char *out,
                            size_t len, const void *key, unsigned char ivec[16],
                            u64 *Xi);
-size_t ppc_aes_gcm_encrypt_wrap(const unsigned char *in, unsigned char *out,
-                                size_t len, const void *key,
-                                unsigned char ivec[16], u64 *Xi);
-size_t ppc_aes_gcm_decrypt_wrap(const unsigned char *in, unsigned char *out,
-                                size_t len, const void *key,
-                                unsigned char ivec[16], u64 *Xi);
-#  define AES_gcm_encrypt ppc_aes_gcm_encrypt_wrap
-#  define AES_gcm_decrypt ppc_aes_gcm_decrypt_wrap
-#  define AES_GCM_ASM(gctx) ((gctx)->ctr==aes_p8_ctr32_encrypt_blocks && \
-                             (gctx)->gcm.ghash==gcm_ghash_p8)
+# define AES_GCM_ASM_PPC(gctx) ((gctx)->ctr==aes_p8_ctr32_encrypt_blocks && \
+                                (gctx)->gcm.ghash==gcm_ghash_p8)
 void gcm_ghash_p8(u64 Xi[2],const u128 Htable[16],const u8 *inp, size_t len);
 
-extern size_t ppc_aes_gcm_encrypt(const unsigned char *in, unsigned char *out, size_t len,
-                                  const void *key, unsigned char ivec[16], u64 *Xi);
-extern size_t ppc_aes_gcm_decrypt(const unsigned char *in, unsigned char *out, size_t len,
-                                  const void *key, unsigned char ivec[16], u64 *Xi);
-
 static inline u32 UTO32(unsigned char *buf)
 {
     return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) | ((u32) buf[2] << 8) | ((u32) buf[3]);
@@ -223,62 +209,6 @@ static inline u32 add32TOU(unsigned char
     return r;
 }
 
-static size_t aes_p10_gcm_crypt(const unsigned char *in, unsigned char *out, size_t len,
-                                const void *key, unsigned char ivec[16], u64 *Xi, int encrypt)
-{
-    int s = 0;
-    int ndone = 0;
-    int ctr_reset = 0;
-    u64 blocks_unused;
-    u64 nb = len / 16;
-    u64 next_ctr = 0;
-    unsigned char ctr_saved[12];
-
-    memcpy(ctr_saved, ivec, 12);
-
-    while (nb) {
-        blocks_unused = (u64) 0xffffffffU + 1 - (u64) UTO32 (ivec + 12);
-        if (nb > blocks_unused) {
-            len = blocks_unused * 16;
-            nb -= blocks_unused;
-            next_ctr = blocks_unused;
-            ctr_reset = 1;
-        } else {
-            len = nb * 16;
-            next_ctr = nb;
-            nb = 0;
-        }
-
-        s = encrypt ? ppc_aes_gcm_encrypt(in, out, len, key, ivec, Xi)
-                    : ppc_aes_gcm_decrypt(in, out, len, key, ivec, Xi);
-
-        /* add counter to ivec */
-        add32TOU(ivec + 12, (u32) next_ctr);
-        if (ctr_reset) {
-            ctr_reset = 0;
-            in += len;
-            out += len;
-        }
-        memcpy(ivec, ctr_saved, 12);
-        ndone += s;
-    }
-
-    return ndone;
-}
-
-size_t ppc_aes_gcm_encrypt_wrap(const unsigned char *in, unsigned char *out, size_t len,
-                                const void *key, unsigned char ivec[16], u64 *Xi)
-{
-    return aes_p10_gcm_crypt(in, out, len, key, ivec, Xi, 1);
-}
-
-size_t ppc_aes_gcm_decrypt_wrap(const unsigned char *in, unsigned char *out, size_t len,
-                                const void *key, unsigned char ivec[16], u64 *Xi)
-{
-    return aes_p10_gcm_crypt(in, out, len, key, ivec, Xi, 0);
-}
-
-# endif
 #endif
 
 #if     defined(OPENSSL_CPUID_OBJ) &&                   (  \
@@ -3294,6 +3224,51 @@ static int aes_gcm_tls_cipher(EVP_CIPHER
     return rv;
 }
 
+#if defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC))
+static size_t ppc_aes_gcm_crypt(const unsigned char *in, unsigned char *out, size_t len,
+                                const void *key, unsigned char ivec[16], u64 *Xi, int encrypt)
+{
+    int s = 0;
+    int ndone = 0;
+    int ctr_reset = 0;
+    u64 blocks_unused;
+    u64 nb = len / 16;
+    u64 next_ctr = 0;
+    unsigned char ctr_saved[12];
+
+    memcpy(ctr_saved, ivec, 12);
+
+    while (nb) {
+        blocks_unused = (u64) 0xffffffffU + 1 - (u64) UTO32 (ivec + 12);
+        if (nb > blocks_unused) {
+            len = blocks_unused * 16;
+            nb -= blocks_unused;
+            next_ctr = blocks_unused;
+            ctr_reset = 1;
+        } else {
+            len = nb * 16;
+            next_ctr = nb;
+            nb = 0;
+        }
+
+        s = encrypt ? ppc_aes_gcm_encrypt(in, out, len, key, ivec, Xi)
+                    : ppc_aes_gcm_decrypt(in, out, len, key, ivec, Xi);
+
+        /* add counter to ivec */
+        add32TOU(ivec + 12, (u32) next_ctr);
+        if (ctr_reset) {
+            ctr_reset = 0;
+            in += len;
+            out += len;
+        }
+        memcpy(ivec, ctr_saved, 12);
+        ndone += s;
+    }
+
+    return ndone;
+}
+#endif
+
 static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                           const unsigned char *in, size_t len)
 {
@@ -3325,6 +3300,20 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX
                                            out + res, len - res,
                                            gctx->gcm.key, gctx->gcm.Yi.c,
                                            gctx->gcm.Xi.u);
+
+                    gctx->gcm.len.u[1] += bulk;
+                    bulk += res;
+                }
+#elif defined(AES_GCM_ASM_PPC) && defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC))
+                if (PPC_AES_GCM_CAPABLE && len >= AES_GCM_ENC_BYTES && AES_GCM_ASM_PPC(gctx)) {
+                    size_t res = (16 - gctx->gcm.mres) % 16;
+
+                    if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, res))
+                        return -1;
+
+                    bulk = ppc_aes_gcm_crypt(in + res, out + res, len - res,
+                                             gctx->gcm.key,
+                                             gctx->gcm.Yi.c, gctx->gcm.Xi.u, 1);
                     gctx->gcm.len.u[1] += bulk;
                     bulk += res;
                 }
@@ -3372,6 +3361,19 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX
                     gctx->gcm.len.u[1] += bulk;
                     bulk += res;
                 }
+#elif defined(AES_GCM_ASM_PPC) && defined(OPENSSL_CPUID_OBJ) && (defined(__powerpc__) || defined(__ppc__) || defined(_ARCH_PPC))
+                if (PPC_AES_GCM_CAPABLE && len >= AES_GCM_DEC_BYTES && AES_GCM_ASM_PPC(gctx)) {
+                    size_t res = (16 - gctx->gcm.mres) % 16;
+
+                    if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, res))
+                        return -1;
+
+                    bulk = ppc_aes_gcm_crypt(in + res, out + res, len - res,
+                                             gctx->gcm.key,
+                                             gctx->gcm.Yi.c, gctx->gcm.Xi.u, 0);
+                    gctx->gcm.len.u[1] += bulk;
+                    bulk += res;
+                }
 #endif
                 if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm,
                                                 in + bulk,

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File openssl-1_1-Fix-AES-GCM-on-Power-8-CPUs.patch of Package openssl-1_1 (Revision ca33c214ebbf3de090e3fe6a9d873aad)

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