1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
From ba17588a940ee712c3ef6d458adb1087f0c84521 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
Date: Thu, 5 Feb 2015 09:28:10 +0200
Subject: [PATCH] backport changes from upstream padlock module.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Includes support for VIA Nano 64-bit mode.
Signed-off-by: Timo Teräs <timo.teras@iki.fi>
---
engines/e_padlock.c | 142 +++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 125 insertions(+), 17 deletions(-)
diff --git a/engines/e_padlock.c b/engines/e_padlock.c
index 2898e4c..94406cb 100644
--- a/engines/e_padlock.c
+++ b/engines/e_padlock.c
@@ -101,7 +101,10 @@
*/
# undef COMPILE_HW_PADLOCK
# if !defined(I386_ONLY) && !defined(OPENSSL_NO_INLINE_ASM)
-# if (defined(__GNUC__) && (defined(__i386__) || defined(__i386))) || \
+# if (defined(__GNUC__) && __GNUC__>=2 && \
+ (defined(__i386__) || defined(__i386) || \
+ defined(__x86_64__) || defined(__x86_64)) \
+ ) || \
(defined(_MSC_VER) && defined(_M_IX86))
# define COMPILE_HW_PADLOCK
# endif
@@ -303,6 +306,7 @@ static volatile struct padlock_cipher_data *padlock_saved_context;
* =======================================================
*/
# if defined(__GNUC__) && __GNUC__>=2
+# if defined(__i386__) || defined(__i386)
/*
* As for excessive "push %ebx"/"pop %ebx" found all over.
* When generating position-independent code GCC won't let
@@ -379,22 +383,6 @@ static int padlock_available(void)
return padlock_use_ace + padlock_use_rng;
}
-# ifndef OPENSSL_NO_AES
-# ifndef AES_ASM
-/* Our own htonl()/ntohl() */
-static inline void padlock_bswapl(AES_KEY *ks)
-{
- size_t i = sizeof(ks->rd_key) / sizeof(ks->rd_key[0]);
- unsigned int *key = ks->rd_key;
-
- while (i--) {
- asm volatile ("bswapl %0":"+r" (*key));
- key++;
- }
-}
-# endif
-# endif
-
/*
* Force key reload from memory to the CPU microcode. Loading EFLAGS from the
* stack clears EFLAGS[30] which does the trick.
@@ -448,6 +436,110 @@ static inline void *name(size_t cnt, \
: "edx", "cc", "memory"); \
return iv; \
}
+#endif
+
+#elif defined(__x86_64__) || defined(__x86_64)
+
+/* Load supported features of the CPU to see if
+ the PadLock is available. */
+static int
+padlock_available(void)
+{
+ char vendor_string[16];
+ unsigned int eax, edx;
+
+ /* Are we running on the Centaur (VIA) CPU? */
+ eax = 0x00000000;
+ vendor_string[12] = 0;
+ asm volatile (
+ "cpuid\n"
+ "movl %%ebx,(%1)\n"
+ "movl %%edx,4(%1)\n"
+ "movl %%ecx,8(%1)\n"
+ : "+a"(eax) : "r"(vendor_string) : "rbx", "rcx", "rdx");
+ if (strcmp(vendor_string, "CentaurHauls") != 0)
+ return 0;
+
+ /* Check for Centaur Extended Feature Flags presence */
+ eax = 0xC0000000;
+ asm volatile ("cpuid"
+ : "+a"(eax) : : "rbx", "rcx", "rdx");
+ if (eax < 0xC0000001)
+ return 0;
+
+ /* Read the Centaur Extended Feature Flags */
+ eax = 0xC0000001;
+ asm volatile ("cpuid"
+ : "+a"(eax), "=d"(edx) : : "rbx", "rcx");
+
+ /* Fill up some flags */
+ padlock_use_ace = ((edx & (0x3<<6)) == (0x3<<6));
+ padlock_use_rng = ((edx & (0x3<<2)) == (0x3<<2));
+
+ return padlock_use_ace + padlock_use_rng;
+}
+
+/* Force key reload from memory to the CPU microcode.
+ Loading EFLAGS from the stack clears EFLAGS[30]
+ which does the trick. */
+static inline void
+padlock_reload_key(void)
+{
+ asm volatile ("pushfq; popfq");
+}
+
+#ifndef OPENSSL_NO_AES
+/*
+ * This is heuristic key context tracing. At first one
+ * believes that one should use atomic swap instructions,
+ * but it's not actually necessary. Point is that if
+ * padlock_saved_context was changed by another thread
+ * after we've read it and before we compare it with cdata,
+ * our key *shall* be reloaded upon thread context switch
+ * and we are therefore set in either case...
+ */
+static inline void
+padlock_verify_context(struct padlock_cipher_data *cdata)
+{
+ asm volatile (
+ "pushfq\n"
+" btl $30,(%%rsp)\n"
+" jnc 1f\n"
+" cmpq %2,%1\n"
+" je 1f\n"
+" popfq\n"
+" subq $8,%%rsp\n"
+"1: addq $8,%%rsp\n"
+" movq %2,%0"
+ :"+m"(padlock_saved_context)
+ : "r"(padlock_saved_context), "r"(cdata) : "cc");
+}
+
+/* Template for padlock_xcrypt_* modes */
+/* BIG FAT WARNING:
+ * The offsets used with 'leal' instructions
+ * describe items of the 'padlock_cipher_data'
+ * structure.
+ */
+#define PADLOCK_XCRYPT_ASM(name,rep_xcrypt) \
+static inline void *name(size_t cnt, \
+ struct padlock_cipher_data *cdata, \
+ void *out, const void *inp) \
+{ void *iv; \
+ asm volatile ( "leaq 16(%0),%%rdx\n" \
+ " leaq 32(%0),%%rbx\n" \
+ rep_xcrypt "\n" \
+ : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp) \
+ : "0"(cdata), "1"(cnt), "2"(out), "3"(inp) \
+ : "rbx", "rdx", "cc", "memory"); \
+ return iv; \
+}
+#endif
+
+#endif /* cpu */
+
+
+# ifndef OPENSSL_NO_AES
/* Generate all functions with appropriate opcodes */
/* rep xcryptecb */
@@ -458,7 +550,23 @@ PADLOCK_XCRYPT_ASM(padlock_xcrypt_ecb, ".byte 0xf3,0x0f,0xa7,0xc8")
PADLOCK_XCRYPT_ASM(padlock_xcrypt_cfb, ".byte 0xf3,0x0f,0xa7,0xe0")
/* rep xcryptofb */
PADLOCK_XCRYPT_ASM(padlock_xcrypt_ofb, ".byte 0xf3,0x0f,0xa7,0xe8")
+
+# ifndef AES_ASM
+/* Our own htonl()/ntohl() */
+static inline void padlock_bswapl(AES_KEY *ks)
+{
+ size_t i = sizeof(ks->rd_key) / sizeof(ks->rd_key[0]);
+ unsigned int *key = ks->rd_key;
+
+ while (i--) {
+ asm volatile ("bswapl %0":"+r" (*key));
+ key++;
+ }
+}
+# endif
+
# endif
+
/* The RNG call itself */
static inline unsigned int padlock_xstore(void *addr, unsigned int edx_in)
{
--
2.2.2
|
