--- /dev/null
+/*
+ * Support for VIA PadLock Advanced Cryptography Engine (ACE)
+ * Written by Michal Ludvig <michal@logix.cz>
+ * http://www.logix.cz/michal
+ *
+ * Big thanks to Andy Polyakov for a help with optimization,
+ * assembler fixes, port to MS Windows and a lot of other
+ * valuable work on this engine!
+ */
+
+/* ====================================================================
+ * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/crypto.h>
+#include <openssl/dso.h>
+#include <openssl/engine.h>
+#include <openssl/evp.h>
+#include <openssl/aes.h>
+
+#ifndef OPENSSL_NO_HW
+#ifndef OPENSSL_NO_HW_PADLOCK
+
+/* Attempt to have a single source for both 0.9.7 and 0.9.8 :-) */
+#if (OPENSSL_VERSION_NUMBER >= 0x00908000L)
+# ifndef OPENSSL_NO_DYNAMIC_ENGINE
+# define DYNAMIC_ENGINE
+# endif
+#elif (OPENSSL_VERSION_NUMBER >= 0x00907000L)
+# ifdef ENGINE_DYNAMIC_SUPPORT
+# define DYNAMIC_ENGINE
+# endif
+#else
+# error "Only OpenSSL >= 0.9.7 is supported"
+#endif
+
+/* VIA PadLock AES is available *ONLY* on some x86 CPUs.
+ Not only that it doesn't exist elsewhere, but it
+ even can't be compiled on other platforms!
+
+ In addition, because of the heavy use of inline assembler,
+ compiler choice is limited to GCC and Microsoft C. */
+#undef COMPILE_HW_PADLOCK
+#if !defined(I386_ONLY) && !defined(OPENSSL_NO_INLINE_ASM)
+# if defined(__i386__) || defined(__i386) || defined(_M_IX86)
+# define COMPILE_HW_PADLOCK
+# endif
+#endif
+
+static ENGINE *ENGINE_padlock (void);
+
+void ENGINE_load_padlock (void)
+{
+/* On non-x86 CPUs it just returns. */
+#ifdef COMPILE_HW_PADLOCK
+ ENGINE *toadd = ENGINE_padlock ();
+ if (!toadd) return;
+ ENGINE_add (toadd);
+ ENGINE_free (toadd);
+ ERR_clear_error ();
+#endif
+}
+
+#ifdef COMPILE_HW_PADLOCK
+/* Function for ENGINE detection and control */
+static int padlock_available(void);
+static int padlock_init(ENGINE *e);
+
+/* RNG Stuff */
+static RAND_METHOD padlock_rand;
+
+/* Cipher Stuff */
+static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
+
+/* Engine names */
+static const char *padlock_id = "padlock";
+static char padlock_name[100];
+
+/* Available features */
+static int padlock_use_ace = 0; /* Advanced Cryptography Engine */
+static int padlock_use_rng = 0; /* Random Number Generator */
+static int padlock_aes_align_required = 1;
+
+/* ===== Engine "management" functions ===== */
+
+/* Prepare the ENGINE structure for registration */
+static int
+padlock_bind_helper(ENGINE *e)
+{
+ /* Check available features */
+ padlock_available();
+
+#if 1 /* disable RNG for now, see commentary in vicinity of RNG code */
+ padlock_use_rng=0;
+#endif
+
+ /* Generate a nice engine name with available features */
+ snprintf(padlock_name, sizeof(padlock_name), "VIA PadLock (%s, %s)",
+ padlock_use_rng ? "RNG" : "no-RNG",
+ padlock_use_ace ? "ACE" : "no-ACE");
+
+ /* Register everything or return with an error */
+ if (!ENGINE_set_id(e, padlock_id) ||
+ !ENGINE_set_name(e, padlock_name) ||
+
+ !ENGINE_set_init_function(e, padlock_init) ||
+
+ (padlock_use_ace && !ENGINE_set_ciphers (e, padlock_ciphers)) ||
+ (padlock_use_rng && !ENGINE_set_RAND (e, &padlock_rand))) {
+ return 0;
+ }
+
+ /* Everything looks good */
+ return 1;
+}
+
+/* Constructor */
+static ENGINE *
+ENGINE_padlock(void)
+{
+ ENGINE *eng = ENGINE_new();
+
+ if (!eng) {
+ return NULL;
+ }
+
+ if (!padlock_bind_helper(eng)) {
+ ENGINE_free(eng);
+ return NULL;
+ }
+
+ return eng;
+}
+
+/* Check availability of the engine */
+static int
+padlock_init(ENGINE *e)
+{
+ return (padlock_use_rng || padlock_use_ace);
+}
+
+/* This stuff is needed if this ENGINE is being compiled into a self-contained
+ * shared-library.
+ */
+#ifdef DYNAMIC_ENGINE
+static int
+padlock_bind_fn(ENGINE *e, const char *id)
+{
+ if (id && (strcmp(id, padlock_id) != 0)) {
+ return 0;
+ }
+
+ if (!padlock_bind_helper(e)) {
+ return 0;
+ }
+
+ return 1;
+}
+
+IMPLEMENT_DYNAMIC_CHECK_FN ();
+IMPLEMENT_DYNAMIC_BIND_FN (padlock_bind_fn);
+#endif /* DYNAMIC_ENGINE */
+
+/* ===== Here comes the "real" engine ===== */
+
+/* Some AES-related constants */
+#define AES_BLOCK_SIZE 16
+#define AES_KEY_SIZE_128 16
+#define AES_KEY_SIZE_192 24
+#define AES_KEY_SIZE_256 32
+
+/* Here we store the status information relevant to the
+ current context. */
+/* BIG FAT WARNING:
+ * Inline assembler in PADLOCK_XCRYPT_ASM()
+ * depends on the order of items in this structure.
+ * Don't blindly modify, reorder, etc!
+ */
+struct padlock_cipher_data
+{
+ unsigned char iv[AES_BLOCK_SIZE]; /* Initialization vector */
+ union { unsigned int pad[4];
+ struct {
+ int rounds:4;
+ int algo:3;
+ int keygen:1;
+ int interm:1;
+ int encdec:1;
+ int ksize:2;
+ } b;
+ } cword; /* Control word */
+ AES_KEY ks; /* Encryption key */
+};
+
+/*
+ * =======================================================
+ * Inline assembler section(s).
+ * =======================================================
+ * Order of arguments is chosen to facilitate Windows port
+ * using __fastcall calling convention. If you wish to add
+ * more routines, keep in mind that in __fastcall first
+ * argument is passed in %ecx and second - in %edx.
+ * =======================================================
+ */
+#if defined(__GNUC__) && __GNUC__>=2
+/*
+ * As for excessive "push %ebx"/"pop %ebx" found all over.
+ * When generating position-independent code GCC won't let
+ * us use "b" in assembler templates nor even respect "ebx"
+ * in "clobber description." Therefore the trouble...
+ */
+
+/* Helper function - check if a CPUID instruction
+ is available on this CPU */
+static int
+padlock_insn_cpuid_available(void)
+{
+ int result = -1;
+
+ /* We're checking if the bit #21 of EFLAGS
+ can be toggled. If yes = CPUID is available. */
+ asm volatile (
+ "pushf\n"
+ "popl %%eax\n"
+ "xorl $0x200000, %%eax\n"
+ "movl %%eax, %%ecx\n"
+ "andl $0x200000, %%ecx\n"
+ "pushl %%eax\n"
+ "popf\n"
+ "pushf\n"
+ "popl %%eax\n"
+ "andl $0x200000, %%eax\n"
+ "xorl %%eax, %%ecx\n"
+ "movl %%ecx, %0\n"
+ : "=r" (result) : : "eax", "ecx");
+
+ return (result == 0);
+}
+
+/* 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;
+
+ /* First check if the CPUID instruction is available at all... */
+ if (! padlock_insn_cpuid_available())
+ return 0;
+
+ /* Are we running on the Centaur (VIA) CPU? */
+ eax = 0x00000000;
+ vendor_string[12] = 0;
+ asm volatile (
+ "pushl %%ebx\n"
+ "cpuid\n"
+ "movl %%ebx,(%%edi)\n"
+ "movl %%edx,4(%%edi)\n"
+ "movl %%ecx,8(%%edi)\n"
+ "popl %%ebx"
+ : "+a"(eax) : "D"(vendor_string) : "ecx", "edx");
+ if (strcmp(vendor_string, "CentaurHauls") != 0)
+ return 0;
+
+ /* Check for Centaur Extended Feature Flags presence */
+ eax = 0xC0000000;
+ asm volatile ("pushl %%ebx; cpuid; popl %%ebx"
+ : "+a"(eax) : : "ecx", "edx");
+ if (eax < 0xC0000001)
+ return 0;
+
+ /* Read the Centaur Extended Feature Flags */
+ eax = 0xC0000001;
+ asm volatile ("pushl %%ebx; cpuid; popl %%ebx"
+ : "+a"(eax), "=d"(edx) : : "ecx");
+
+ /* 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;
+}
+
+/* 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 long *key = ks->rd_key;
+
+ while (i--) {
+ asm volatile ("bswapl %0" : "+r"(*key));
+ key++;
+ }
+}
+
+/* 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 ("pushfl; popfl");
+}
+
+/*
+ * 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
+ * saved_cdata 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)
+{
+ static struct padlock_cipher_data *saved_cdata;
+
+ asm volatile (
+ "pushfl\n"
+" bt $30,(%%esp)\n"
+" jnc 1f\n"
+" cmp %2,%1\n"
+" je 1f\n"
+" mov %2,%0\n"
+" popfl\n"
+" sub $4,%%esp\n"
+"1: add $4,%%esp"
+ :"+m"(saved_cdata) : "r"(saved_cdata), "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 ( "pushl %%ebx\n" \
+ " leal 16(%0),%%edx\n" \
+ " leal 32(%0),%%ebx\n" \
+ rep_xcrypt "\n" \
+ " popl %%ebx" \
+ : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp) \
+ : "0"(cdata), "1"(cnt), "2"(out), "3"(inp) \
+ : "edx", "cc"); \
+ return iv; \
+}
+
+/* Generate all functions with appropriate opcodes */
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_ecb, ".byte 0xf3,0x0f,0xa7,0xc8"); /* rep xcryptecb */
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_cbc, ".byte 0xf3,0x0f,0xa7,0xd0"); /* rep xcryptcbc */
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_cfb, ".byte 0xf3,0x0f,0xa7,0xe0"); /* rep xcryptcfb */
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_ofb, ".byte 0xf3,0x0f,0xa7,0xe8"); /* rep xcryptofb */
+
+/* The RNG call itself */
+static inline unsigned int
+padlock_xstore(void *addr, unsigned int edx_in)
+{
+ unsigned int eax_out;
+
+ asm volatile (".byte 0x0f,0xa7,0xc0" /* xstore */
+ : "=a"(eax_out),"=m"(*(unsigned *)addr)
+ : "D"(addr), "d" (edx_in)
+ );
+
+ return eax_out;
+}
+
+#elif defined(_MSC_VER)
+/*
+ * Unlike GCC these are real functions. In order to minimize impact
+ * on performance we adhere to __fastcall calling convention in
+ * order to get two first arguments passed through %ecx and %edx.
+ * Which kind of suits very well, as instructions in question use
+ * both %ecx and %edx as input:-)
+ */
+#define REP_XCRYPT(code) \
+ _asm _emit 0xf3 \
+ _asm _emit 0x0f _asm _emit 0xa7 \
+ _asm _emit code
+
+/* BIG FAT WARNING:
+ * The offsets used with 'lea' instructions
+ * describe items of the 'padlock_cipher_data'
+ * structure.
+ */
+#define PADLOCK_XCRYPT_ASM(name,code) \
+static void * __fastcall \
+ name (size_t cnt, void *cdata, \
+ void *outp, const void *inp) \
+{ _asm mov eax,edx \
+ _asm lea ebx,[eax+16] \
+ _asm lea edx,[eax+32] \
+ _asm mov edi,outp \
+ _asm mov esi,inp \
+ REP_XCRYPT(code) \
+}
+
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_ecb,0xc8)
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_cbc,0xd0)
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_cfb,0xe0)
+PADLOCK_XCRYPT_ASM(padlock_xcrypt_ofb,0xe8)
+
+static int __fastcall
+padlock_xstore(void *outp,unsigned int code)
+{ _asm mov edi,ecx
+ _asm _emit 0x0f _asm _emit 0xa7 _asm _emit 0xc0
+}
+
+static void __fastcall
+padlock_reload_key(void)
+{ _asm pushfd _asm popfd }
+
+static void __fastcall
+padlock_verify_context(void *cdata)
+{ static void *saved_cdata;
+
+ _asm {
+ pushfd
+ bt DWORD PTR[esp],30
+ jnc skip
+ cmp ecx,saved_cdata
+ je skip
+ mov saved_cdata,ecx
+ popfd
+ sub esp,4
+ skip: add esp,4
+ }
+}
+
+sttic int __fastcall
+padlock_available(void)
+{ _asm {
+ pushfd
+ pop eax
+ mov ecx,eax
+ xor eax,1<<21
+ push eax
+ popfd
+ pushfd
+ pop eax
+ xor eax,ecx
+ bt eax,21
+ jnc noluck
+ mov eax,0
+ cpuid
+ xor eax,eax
+ cmp ebx,'tneC'
+ jne noluck
+ cmp edx,'Hrua'
+ jne noluck
+ cmp ecx,'slua'
+ jne noluck
+ mov eax,0xC0000000
+ cpuid
+ mov edx,eax
+ xor eax,eax
+ cmp edx,0xC0000001
+ jb noluck
+ mov eax,0xC0000001
+ cpuid
+ xor eax,eax
+ bt edx,6
+ jnc skip_a
+ bt edx,7
+ jnc skip_a
+ mov padlock_use_ace,1
+ inc eax
+ skip_a: bt edx,2
+ jnc skip_r
+ bt edx,3
+ jnc skip_r
+ mov padlock_use_rng,1
+ inc eax
+ skip_r:
+ noluck:
+ }
+}
+
+static void __fastcall
+padlock_bswapl(void *key)
+{ _asm {
+ pushfd
+ cld
+ mov esi,ecx
+ mov edi,ecx
+ mov ecx,60
+ up:
+ lodsd
+ bswap eax
+ stosd
+ loop up
+ popfd
+ }
+}
+#endif
+
+/* ===== AES encryption/decryption ===== */
+
+#if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
+#define NID_aes_128_cfb NID_aes_128_cfb128
+#endif
+
+#if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
+#define NID_aes_128_ofb NID_aes_128_ofb128
+#endif
+
+#if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
+#define NID_aes_192_cfb NID_aes_192_cfb128
+#endif
+
+#if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
+#define NID_aes_192_ofb NID_aes_192_ofb128
+#endif
+
+#if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
+#define NID_aes_256_cfb NID_aes_256_cfb128
+#endif
+
+#if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
+#define NID_aes_256_ofb NID_aes_256_ofb128
+#endif
+
+/* List of supported ciphers. */
+static int padlock_cipher_nids[] = {
+ NID_aes_128_ecb,
+ NID_aes_128_cbc,
+ NID_aes_128_cfb,
+ NID_aes_128_ofb,
+
+ NID_aes_192_ecb,
+ NID_aes_192_cbc,
+// NID_aes_192_cfb, /* FIXME: AES192/256 CFB/OFB don't work. */
+// NID_aes_192_ofb,
+
+ NID_aes_256_ecb,
+ NID_aes_256_cbc,
+// NID_aes_256_cfb,
+// NID_aes_256_ofb,
+};
+static int padlock_cipher_nids_num = (sizeof(padlock_cipher_nids)/
+ sizeof(padlock_cipher_nids[0]));
+
+/* Function prototypes ... */
+static int padlock_aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc);
+static int padlock_aes_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, unsigned int nbytes);
+
+#define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)(ctx->cipher_data + ((0x10 - ((size_t)(ctx->cipher_data) & 0x0F)) & 0x0F)))
+
+/* Declaring so many ciphers by hand would be a pain.
+ Instead introduce a bit of preprocessor magic :-) */
+#define DECLARE_AES_EVP(ksize,lmode,umode) \
+static const EVP_CIPHER padlock_aes_##ksize##_##lmode = { \
+ NID_aes_##ksize##_##lmode, \
+ AES_BLOCK_SIZE, \
+ AES_KEY_SIZE_##ksize, \
+ AES_BLOCK_SIZE, \
+ 0 | EVP_CIPH_##umode##_MODE, \
+ padlock_aes_init_key, \
+ padlock_aes_cipher, \
+ NULL, \
+ sizeof(struct padlock_cipher_data) + 16, \
+ EVP_CIPHER_set_asn1_iv, \
+ EVP_CIPHER_get_asn1_iv, \
+ NULL, \
+ NULL \
+}
+
+DECLARE_AES_EVP(128,ecb,ECB);
+DECLARE_AES_EVP(128,cbc,CBC);
+DECLARE_AES_EVP(128,cfb,CFB);
+DECLARE_AES_EVP(128,ofb,OFB);
+
+DECLARE_AES_EVP(192,ecb,ECB);
+DECLARE_AES_EVP(192,cbc,CBC);
+DECLARE_AES_EVP(192,cfb,CFB);
+DECLARE_AES_EVP(192,ofb,OFB);
+
+DECLARE_AES_EVP(256,ecb,ECB);
+DECLARE_AES_EVP(256,cbc,CBC);
+DECLARE_AES_EVP(256,cfb,CFB);
+DECLARE_AES_EVP(256,ofb,OFB);
+
+static int
+padlock_ciphers (ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid)
+{
+ /* No specific cipher => return a list of supported nids ... */
+ if (!cipher) {
+ *nids = padlock_cipher_nids;
+ return padlock_cipher_nids_num;
+ }
+
+ /* ... or the requested "cipher" otherwise */
+ switch (nid) {
+ case NID_aes_128_ecb:
+ *cipher = &padlock_aes_128_ecb;
+ break;
+ case NID_aes_128_cbc:
+ *cipher = &padlock_aes_128_cbc;
+ break;
+ case NID_aes_128_cfb:
+ *cipher = &padlock_aes_128_cfb;
+ break;
+ case NID_aes_128_ofb:
+ *cipher = &padlock_aes_128_ofb;
+ break;
+
+ case NID_aes_192_ecb:
+ *cipher = &padlock_aes_192_ecb;
+ break;
+ case NID_aes_192_cbc:
+ *cipher = &padlock_aes_192_cbc;
+ break;
+ case NID_aes_192_cfb:
+ *cipher = &padlock_aes_192_cfb;
+ break;
+ case NID_aes_192_ofb:
+ *cipher = &padlock_aes_192_ofb;
+ break;
+
+ case NID_aes_256_ecb:
+ *cipher = &padlock_aes_256_ecb;
+ break;
+ case NID_aes_256_cbc:
+ *cipher = &padlock_aes_256_cbc;
+ break;
+ case NID_aes_256_cfb:
+ *cipher = &padlock_aes_256_cfb;
+ break;
+ case NID_aes_256_ofb:
+ *cipher = &padlock_aes_256_ofb;
+ break;
+
+ default:
+ /* Sorry, we don't support this NID */
+ *cipher = NULL;
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Prepare the encryption key for PadLock usage */
+static int
+padlock_aes_init_key (EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ struct padlock_cipher_data *cdata;
+ int key_len = EVP_CIPHER_CTX_key_length(ctx) * 8;
+
+ if (key==NULL) return 0; /* ERROR */
+
+ cdata = ALIGNED_CIPHER_DATA(ctx);
+ memset(cdata, 0, sizeof(struct padlock_cipher_data));
+
+ /* Prepare Control word. */
+ cdata->cword.b.encdec = (ctx->encrypt == 0);
+ cdata->cword.b.rounds = 10 + (key_len - 128) / 32;
+ cdata->cword.b.ksize = (key_len - 128) / 64;
+
+ switch(key_len) {
+ case 128:
+ /* PadLock can generate an extended key for
+ AES128 in hardware */
+ memcpy(cdata->ks.rd_key, key, AES_KEY_SIZE_128);
+ cdata->cword.b.keygen = 0;
+ break;
+
+ case 192:
+ case 256:
+ /* Generate an extended AES key in software.
+ Needed for AES192/AES256 */
+ if (enc)
+ AES_set_encrypt_key(key, key_len, &cdata->ks);
+ else
+ AES_set_decrypt_key(key, key_len, &cdata->ks);
+
+ /* OpenSSL internal functions use byte-swapped extended key. */
+ padlock_bswapl(&cdata->ks);
+
+ cdata->cword.b.keygen = 1;
+ break;
+
+ default:
+ /* ERROR */
+ return 0;
+ }
+
+ /*
+ * This is done to cover for cases when user reuses the
+ * context for new key. The catch is that if we don't do
+ * this, padlock_eas_cipher might proceed with old key...
+ */
+ padlock_reload_key ();
+
+ return 1;
+}
+
+/*
+ * Simplified version of padlock_aes_cipher() used when
+ * 1) both input and output buffers are at aligned addresses.
+ * or when
+ * 2) running on a newer CPU that doesn't require aligned buffers.
+ */
+static int
+padlock_aes_cipher_omnivorous(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
+ const unsigned char *in_arg, size_t nbytes)
+{
+ struct padlock_cipher_data *cdata;
+ void *iv;
+
+ cdata = ALIGNED_CIPHER_DATA(ctx);
+ padlock_verify_context(cdata);
+
+ switch (EVP_CIPHER_CTX_mode(ctx)) {
+ case EVP_CIPH_ECB_MODE:
+ padlock_xcrypt_ecb(nbytes/AES_BLOCK_SIZE, cdata, out_arg, in_arg);
+ break;
+
+ case EVP_CIPH_CBC_MODE:
+ memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ iv = padlock_xcrypt_cbc(nbytes/AES_BLOCK_SIZE, cdata, out_arg, in_arg);
+ memcpy(ctx->iv, iv, AES_BLOCK_SIZE);
+ break;
+
+ case EVP_CIPH_CFB_MODE:
+ memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ iv = padlock_xcrypt_cfb(nbytes/AES_BLOCK_SIZE, cdata, out_arg, in_arg);
+ memcpy(ctx->iv, iv, AES_BLOCK_SIZE);
+ break;
+
+ case EVP_CIPH_OFB_MODE:
+ memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ padlock_xcrypt_ofb(nbytes/AES_BLOCK_SIZE, cdata, out_arg, in_arg);
+ memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
+ break;
+
+ default:
+ return 0;
+ }
+
+ memset(cdata->iv, 0, AES_BLOCK_SIZE);
+
+ return 1;
+}
+
+#ifndef PADLOCK_CHUNK
+# define PADLOCK_CHUNK 4096 /* Must be a power of 2 larger than 16 */
+#endif
+#if PADLOCK_CHUNK<16 || PADLOCK_CHUNK&(PADLOCK_CHUNK-1)
+# error "insane PADLOCK_CHUNK..."
+#endif
+
+/* Re-align the arguments to 16-Bytes boundaries and run the
+ encryption function itself. This function is not AES-specific. */
+static int
+padlock_aes_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out_arg,
+ const unsigned char *in_arg, size_t nbytes)
+{
+ struct padlock_cipher_data *cdata;
+ const void *inp;
+ void *out, *iv;
+ int inp_misaligned, out_misaligned, realign_in_loop;
+ size_t chunk, allocated;
+
+ if (nbytes == 0)
+ return 1;
+ if (nbytes % AES_BLOCK_SIZE)
+ return 0; /* are we expected to do tail processing? */
+
+#if 0
+ /* There is more work to support CPUs that don't require alignment.
+ Therefore disabled completely for now... */
+ if (!padlock_aes_align_required)
+ return padlock_aes_cipher_omnivorous(ctx, out_arg, in_arg, nbytes);
+#endif
+
+ inp_misaligned = (((size_t)in_arg) & 0x0F);
+ out_misaligned = (((size_t)out_arg) & 0x0F);
+
+ /* Note that even if output is aligned and input not,
+ * I still prefer to loop instead of copy the whole
+ * input and then encrypt in one stroke. This is done
+ * in order to improve L1 cache utilization... */
+ realign_in_loop = out_misaligned|inp_misaligned;
+
+ if (!realign_in_loop)
+ return padlock_aes_cipher_omnivorous(ctx, out_arg, in_arg, nbytes);
+
+ /* this takes one "if" out of the loops */
+ chunk = nbytes;
+ chunk %= PADLOCK_CHUNK;
+ if (chunk==0) chunk = PADLOCK_CHUNK;
+
+ if (out_misaligned) {
+ /* optmize for small input */
+ allocated = (chunk<nbytes?PADLOCK_CHUNK:nbytes);
+#ifdef _MSC_VER
+ out = _alloca(0x10 + allocated);
+#else
+ out = alloca(0x10 + allocated);
+#endif
+ out += (0x10 - ((size_t)out & 0x0F)) & 0x0F;
+ }
+ else
+ out = out_arg;
+
+ cdata = ALIGNED_CIPHER_DATA(ctx);
+ padlock_verify_context(cdata);
+
+ switch (EVP_CIPHER_CTX_mode(ctx)) {
+ case EVP_CIPH_ECB_MODE:
+ do {
+ if (inp_misaligned)
+ inp = memcpy(out, in_arg, chunk);
+ else
+ inp = in_arg;
+ in_arg += chunk;
+
+ padlock_xcrypt_ecb(chunk/AES_BLOCK_SIZE, cdata, out, inp);
+
+ if (out_misaligned)
+ out_arg = memcpy(out_arg, out, chunk) + chunk;
+ else
+ out = out_arg+=chunk;
+
+ nbytes -= chunk;
+ chunk = PADLOCK_CHUNK;
+ } while (nbytes);
+ break;
+
+ case EVP_CIPH_CBC_MODE:
+ memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ goto cbc_shortcut;
+ do {
+ if (iv != cdata->iv)
+ memcpy(cdata->iv, iv, AES_BLOCK_SIZE);
+ chunk = PADLOCK_CHUNK;
+ cbc_shortcut: /* optimize for small input */
+ if (inp_misaligned)
+ inp = memcpy(out, in_arg, chunk);
+ else
+ inp = in_arg;
+ in_arg += chunk;
+
+ iv = padlock_xcrypt_cbc(chunk/AES_BLOCK_SIZE, cdata, out, inp);
+
+ if (out_misaligned)
+ out_arg = memcpy(out_arg, out, chunk) + chunk;
+ else
+ out = out_arg+=chunk;
+
+ } while (nbytes -= chunk);
+ memcpy(ctx->iv, iv, AES_BLOCK_SIZE);
+ break;
+
+ case EVP_CIPH_CFB_MODE:
+ memcpy (cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ goto cfb_shortcut;
+ do {
+ if (iv != cdata->iv)
+ memcpy(cdata->iv, iv, AES_BLOCK_SIZE);
+ chunk = PADLOCK_CHUNK;
+ cfb_shortcut: /* optimize for small input */
+ if (inp_misaligned)
+ inp = memcpy(out, in_arg, chunk);
+ else
+ inp = in_arg;
+ in_arg += chunk;
+
+ iv = padlock_xcrypt_cfb(chunk/AES_BLOCK_SIZE, cdata, out, inp);
+
+ if (out_misaligned)
+ out_arg = memcpy(out_arg, out, chunk) + chunk;
+ else
+ out = out_arg+=chunk;
+
+ } while (nbytes -= chunk);
+ memcpy(ctx->iv, iv, AES_BLOCK_SIZE);
+ break;
+
+ case EVP_CIPH_OFB_MODE:
+ memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE);
+ do {
+ if (inp_misaligned)
+ inp = memcpy(out, in_arg, chunk);
+ else
+ inp = in_arg;
+ in_arg += chunk;
+
+ padlock_xcrypt_ofb(chunk/AES_BLOCK_SIZE, cdata, out, inp);
+
+ if (out_misaligned)
+ out_arg = memcpy(out_arg, out, chunk) + chunk;
+ else
+ out = out_arg+=chunk;
+
+ nbytes -= chunk;
+ chunk = PADLOCK_CHUNK;
+ } while (nbytes);
+ memcpy(ctx->iv, cdata->iv, AES_BLOCK_SIZE);
+ break;
+
+ default:
+ return 0;
+ }
+
+ /* Clean the realign buffer if it was used */
+ if (out_misaligned) {
+ volatile unsigned long *p=out;
+ size_t n = allocated/sizeof(*p);
+ while (n--) *p++=0;
+ }
+
+ memset(cdata->iv, 0, AES_BLOCK_SIZE);
+
+ return 1;
+}
+
+/* ===== Random Number Generator ===== */
+/*
+ * This code is not engaged. The reason is that it does not comply
+ * with recommendations for VIA RNG usage for secure applications
+ * (posted at http://www.via.com.tw/en/viac3/c3.jsp) nor does it
+ * provide meaningful error control...
+ */
+/* Wrapper that provides an interface between the API and
+ the raw PadLock RNG */
+static int
+padlock_rand_bytes(unsigned char *output, int count)
+{
+ unsigned int eax, buf;
+
+ while (count >= 8) {
+ eax = padlock_xstore(output, 0);
+ if (!(eax&(1<<6))) return 0; /* RNG disabled */
+ /* this ---vv--- covers DC bias, Raw Bits and String Filter */
+ if (eax&(0x1F<<10)) return 0;
+ if ((eax&0x1F)==0) continue; /* no data, retry... */
+ if ((eax&0x1F)!=8) return 0; /* fatal failure... */
+ output += 8;
+ count -= 8;
+ }
+ while (count > 0) {
+ eax = padlock_xstore(&buf, 3);
+ if (!(eax&(1<<6))) return 0; /* RNG disabled */
+ /* this ---vv--- covers DC bias, Raw Bits and String Filter */
+ if (eax&(0x1F<<10)) return 0;
+ if ((eax&0x1F)==0) continue; /* no data, retry... */
+ if ((eax&0x1F)!=1) return 0; /* fatal failure... */
+ *output++ = (unsigned char)buf;
+ count--;
+ }
+ *(volatile unsigned int *)&buf=0;
+
+ return 1;
+}
+
+/* Dummy but necessary function */
+static int
+padlock_rand_status(void)
+{
+ return 1;
+}
+
+/* Prepare structure for registration */
+static RAND_METHOD padlock_rand = {
+ NULL, /* seed */
+ padlock_rand_bytes, /* bytes */
+ NULL, /* cleanup */
+ NULL, /* add */
+ padlock_rand_bytes, /* pseudorand */
+ padlock_rand_status, /* rand status */
+};
+
+#endif /* COMPILE_HW_PADLOCK */
+
+#endif /* !OPENSSL_NO_HW_PADLOCK */
+#endif /* !OPENSSL_NO_HW */
projects / oweals / openssl.git / commitdiff