Index: openssl-0.9.8d/crypto/engine/eng_padlock.c =================================================================== --- openssl-0.9.8d.orig/crypto/engine/eng_padlock.c 2006-12-28 15:01:01.639791913 +1300 +++ /dev/null 1970-01-01 00:00:00.000000000 +0000 @@ -1,1216 +0,0 @@ -/* - * Support for VIA PadLock Advanced Cryptography Engine (ACE) - * Written by Michal Ludvig - * 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 -#include - -#include -#include -#include -#include -#include -#ifndef OPENSSL_NO_AES -#include -#endif -#include -#include - -#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(__GNUC__) && (defined(__i386__) || defined(__i386))) || \ - (defined(_MSC_VER) && defined(_M_IX86)) -# define COMPILE_HW_PADLOCK -static ENGINE *ENGINE_padlock (void); -# endif -#endif - -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 -/* We do these includes here to avoid header problems on platforms that - do not have the VIA padlock anyway... */ -#ifdef _MSC_VER -# include -# define alloca _alloca -#else -# include -#endif - -/* 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 */ -#ifndef OPENSSL_NO_AES -static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid); -#endif - -/* 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 */ -#ifndef OPENSSL_NO_AES -static int padlock_aes_align_required = 1; -#endif - -/* ===== 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 */ - BIO_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) || -#ifndef OPENSSL_NO_AES - (padlock_use_ace && !ENGINE_set_ciphers (e, padlock_ciphers)) || -#endif - (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 ===== */ - -#ifndef OPENSSL_NO_AES -/* 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 dgst:1; /* n/a in C3 */ - int align:1; /* n/a in C3 */ - int ciphr:1; /* n/a in C3 */ - unsigned int keygen:1; - int interm:1; - unsigned int encdec:1; - int ksize:2; - } b; - } cword; /* Control word */ - AES_KEY ks; /* Encryption key */ -}; - -/* - * Essentially this variable belongs in thread local storage. - * Having this variable global on the other hand can only cause - * few bogus key reloads [if any at all on single-CPU system], - * so we accept the penatly... - */ -static volatile struct padlock_cipher_data *padlock_saved_context; -#endif - -/* - * ======================================================= - * 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 first __fastcall - * 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; -} - -#ifndef OPENSSL_NO_AES -/* 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 - -/* 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"); -} - -#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 ( - "pushfl\n" -" btl $30,(%%esp)\n" -" jnc 1f\n" -" cmpl %2,%1\n" -" je 1f\n" -" popfl\n" -" subl $4,%%esp\n" -"1: addl $4,%%esp\n" -" movl %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 ( "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 */ -#endif - -/* 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; -} - -/* Why not inline 'rep movsd'? I failed to find information on what - * value in Direction Flag one can expect and consequently have to - * apply "better-safe-than-sorry" approach and assume "undefined." - * I could explicitly clear it and restore the original value upon - * return from padlock_aes_cipher, but it's presumably too much - * trouble for too little gain... - * - * In case you wonder 'rep xcrypt*' instructions above are *not* - * affected by the Direction Flag and pointers advance toward - * larger addresses unconditionally. - */ -static inline unsigned char * -padlock_memcpy(void *dst,const void *src,size_t n) -{ - long *d=dst; - const long *s=src; - - n /= sizeof(*d); - do { *d++ = *s++; } while (--n); - - return dst; -} - -#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 edx,[eax+16] \ - _asm lea ebx,[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) -{ _asm { - pushfd - bt DWORD PTR[esp],30 - jnc skip - cmp ecx,padlock_saved_context - je skip - popfd - sub esp,4 - skip: add esp,4 - mov padlock_saved_context,ecx - } -} - -static int -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 - } -} - -/* MS actually specifies status of Direction Flag and compiler even - * manages to compile following as 'rep movsd' all by itself... - */ -#define padlock_memcpy(o,i,n) ((unsigned char *)memcpy((o),(i),(n)&~3U)) -#endif - -/* ===== AES encryption/decryption ===== */ -#ifndef OPENSSL_NO_AES - -#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, - 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, size_t nbytes); - -#define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \ - ( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) ) -#define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\ - NEAREST_ALIGNED(ctx->cipher_data)) - -#define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE -#define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE -#define EVP_CIPHER_block_size_OFB 1 -#define EVP_CIPHER_block_size_CFB 1 - -/* 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, \ - EVP_CIPHER_block_size_##umode, \ - 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. */ - if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) - cdata->cword.b.encdec = 0; - else - 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 */ - /* Well, the above applies to Stepping 8 CPUs - and is listed as hardware errata. They most - likely will fix it at some point and then - a check for stepping would be due here. */ - if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE || - EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE || - enc) - AES_set_encrypt_key(key, key_len, &cdata->ks); - else - AES_set_decrypt_key(key, key_len, &cdata->ks); -#ifndef AES_ASM - /* OpenSSL C functions use byte-swapped extended key. */ - padlock_bswapl(&cdata->ks); -#endif - 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 512 /* 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; - unsigned char *out; - void *iv; - int inp_misaligned, out_misaligned, realign_in_loop; - size_t chunk, allocated=0; - - /* ctx->num is maintained in byte-oriented modes, - such as CFB and OFB... */ - if ((chunk = ctx->num)) { /* borrow chunk variable */ - unsigned char *ivp=ctx->iv; - - switch (EVP_CIPHER_CTX_mode(ctx)) { - case EVP_CIPH_CFB_MODE: - if (chunk >= AES_BLOCK_SIZE) - return 0; /* bogus value */ - - if (ctx->encrypt) - while (chunknum = chunk%AES_BLOCK_SIZE; - break; - case EVP_CIPH_OFB_MODE: - if (chunk >= AES_BLOCK_SIZE) - return 0; /* bogus value */ - - while (chunknum = chunk%AES_BLOCK_SIZE; - break; - } - } - - if (nbytes == 0) - return 1; -#if 0 - if (nbytes % AES_BLOCK_SIZE) - return 0; /* are we expected to do tail processing? */ -#else - /* nbytes is always multiple of AES_BLOCK_SIZE in ECB and CBC - modes and arbitrary value in byte-oriented modes, such as - CFB and OFB... */ -#endif - - /* VIA promises CPUs that won't require alignment in the future. - For now padlock_aes_align_required is initialized to 1 and - the condition is never met... */ - /* C7 core is capable to manage unaligned input in non-ECB[!] - mode, but performance penalties appear to be approximately - same as for software alignment below or ~3x. They promise to - improve it in the future, but for now we can just as well - pretend that it can only handle aligned input... */ - if (!padlock_aes_align_required && (nbytes%AES_BLOCK_SIZE)==0) - return padlock_aes_cipher_omnivorous(ctx, out_arg, in_arg, nbytes); - - 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 && (nbytes%AES_BLOCK_SIZE)==0) - 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 = (chunkiv, 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 = padlock_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 = padlock_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 (iv = cdata->iv, ctx->iv, AES_BLOCK_SIZE); - chunk &= ~(AES_BLOCK_SIZE-1); - if (chunk) goto cfb_shortcut; - else goto cfb_skiploop; - 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 = padlock_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 = padlock_memcpy(out_arg, out, chunk) + chunk; - else - out = out_arg+=chunk; - - nbytes -= chunk; - } while (nbytes >= AES_BLOCK_SIZE); - - cfb_skiploop: - if (nbytes) { - unsigned char *ivp = cdata->iv; - - if (iv != ivp) { - memcpy(ivp, iv, AES_BLOCK_SIZE); - iv = ivp; - } - ctx->num = nbytes; - if (cdata->cword.b.encdec) { - cdata->cword.b.encdec=0; - padlock_reload_key(); - padlock_xcrypt_ecb(1,cdata,ivp,ivp); - cdata->cword.b.encdec=1; - padlock_reload_key(); - while(nbytes) { - unsigned char c = *(in_arg++); - *(out_arg++) = c ^ *ivp; - *(ivp++) = c, nbytes--; - } - } - else { padlock_reload_key(); - padlock_xcrypt_ecb(1,cdata,ivp,ivp); - padlock_reload_key(); - while (nbytes) { - *ivp = *(out_arg++) = *(in_arg++) ^ *ivp; - ivp++, nbytes--; - } - } - } - - memcpy(ctx->iv, iv, AES_BLOCK_SIZE); - break; - - case EVP_CIPH_OFB_MODE: - memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE); - chunk &= ~(AES_BLOCK_SIZE-1); - if (chunk) do { - if (inp_misaligned) - inp = padlock_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 = padlock_memcpy(out_arg, out, chunk) + chunk; - else - out = out_arg+=chunk; - - nbytes -= chunk; - chunk = PADLOCK_CHUNK; - } while (nbytes >= AES_BLOCK_SIZE); - - if (nbytes) { - unsigned char *ivp = cdata->iv; - - ctx->num = nbytes; - padlock_reload_key(); /* empirically found */ - padlock_xcrypt_ecb(1,cdata,ivp,ivp); - padlock_reload_key(); /* empirically found */ - while (nbytes) { - *(out_arg++) = *(in_arg++) ^ *ivp; - ivp++, 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=(void *)out; - size_t n = allocated/sizeof(*p); - while (n--) *p++=0; - } - - memset(cdata->iv, 0, AES_BLOCK_SIZE); - - return 1; -} - -#endif /* OPENSSL_NO_AES */ - -/* ===== 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 */ Index: openssl-0.9.8d/engines/e_padlock.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ openssl-0.9.8d/engines/e_padlock.c 2006-12-28 15:46:15.521398913 +1300 @@ -0,0 +1,1218 @@ +/* + * Support for VIA PadLock Advanced Cryptography Engine (ACE) + * Written by Michal Ludvig + * 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 +#include + +#include +#include +#include +#include +#include +#ifndef OPENSSL_NO_AES +#include +#endif +#include +#include + +#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(__GNUC__) && (defined(__i386__) || defined(__i386))) || \ + (defined(_MSC_VER) && defined(_M_IX86)) +# define COMPILE_HW_PADLOCK +static ENGINE *ENGINE_padlock (void); +# endif +#endif + +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 +/* We do these includes here to avoid header problems on platforms that + do not have the VIA padlock anyway... */ +#ifdef _WIN32 +# include +# ifndef alloca +# define alloca _alloca +# endif +#else +# include +#endif + +/* 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 */ +#ifndef OPENSSL_NO_AES +static int padlock_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid); +#endif + +/* 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 */ +#ifndef OPENSSL_NO_AES +static int padlock_aes_align_required = 1; +#endif + +/* ===== 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 */ + BIO_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) || +#ifndef OPENSSL_NO_AES + (padlock_use_ace && !ENGINE_set_ciphers (e, padlock_ciphers)) || +#endif + (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 ===== */ + +#ifndef OPENSSL_NO_AES +/* 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 dgst:1; /* n/a in C3 */ + int align:1; /* n/a in C3 */ + int ciphr:1; /* n/a in C3 */ + unsigned int keygen:1; + int interm:1; + unsigned int encdec:1; + int ksize:2; + } b; + } cword; /* Control word */ + AES_KEY ks; /* Encryption key */ +}; + +/* + * Essentially this variable belongs in thread local storage. + * Having this variable global on the other hand can only cause + * few bogus key reloads [if any at all on single-CPU system], + * so we accept the penatly... + */ +static volatile struct padlock_cipher_data *padlock_saved_context; +#endif + +/* + * ======================================================= + * 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 first __fastcall + * 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; +} + +#ifndef OPENSSL_NO_AES +/* 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 + +/* 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"); +} + +#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 ( + "pushfl\n" +" btl $30,(%%esp)\n" +" jnc 1f\n" +" cmpl %2,%1\n" +" je 1f\n" +" popfl\n" +" subl $4,%%esp\n" +"1: addl $4,%%esp\n" +" movl %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 ( "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), "m"(*cdata) \ + : "edx", "cc", "memory"); \ + 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 */ +#endif + +/* 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; +} + +/* Why not inline 'rep movsd'? I failed to find information on what + * value in Direction Flag one can expect and consequently have to + * apply "better-safe-than-sorry" approach and assume "undefined." + * I could explicitly clear it and restore the original value upon + * return from padlock_aes_cipher, but it's presumably too much + * trouble for too little gain... + * + * In case you wonder 'rep xcrypt*' instructions above are *not* + * affected by the Direction Flag and pointers advance toward + * larger addresses unconditionally. + */ +static inline unsigned char * +padlock_memcpy(void *dst,const void *src,size_t n) +{ + long *d=dst; + const long *s=src; + + n /= sizeof(*d); + do { *d++ = *s++; } while (--n); + + return dst; +} + +#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 edx,[eax+16] \ + _asm lea ebx,[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) +{ _asm { + pushfd + bt DWORD PTR[esp],30 + jnc skip + cmp ecx,padlock_saved_context + je skip + popfd + sub esp,4 + skip: add esp,4 + mov padlock_saved_context,ecx + } +} + +static int +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 + } +} + +/* MS actually specifies status of Direction Flag and compiler even + * manages to compile following as 'rep movsd' all by itself... + */ +#define padlock_memcpy(o,i,n) ((unsigned char *)memcpy((o),(i),(n)&~3U)) +#endif + +/* ===== AES encryption/decryption ===== */ +#ifndef OPENSSL_NO_AES + +#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, + 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, size_t nbytes); + +#define NEAREST_ALIGNED(ptr) ( (unsigned char *)(ptr) + \ + ( (0x10 - ((size_t)(ptr) & 0x0F)) & 0x0F ) ) +#define ALIGNED_CIPHER_DATA(ctx) ((struct padlock_cipher_data *)\ + NEAREST_ALIGNED(ctx->cipher_data)) + +#define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE +#define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE +#define EVP_CIPHER_block_size_OFB 1 +#define EVP_CIPHER_block_size_CFB 1 + +/* 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, \ + EVP_CIPHER_block_size_##umode, \ + 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. */ + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) + cdata->cword.b.encdec = 0; + else + 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 */ + /* Well, the above applies to Stepping 8 CPUs + and is listed as hardware errata. They most + likely will fix it at some point and then + a check for stepping would be due here. */ + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE || + EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE || + enc) + AES_set_encrypt_key(key, key_len, &cdata->ks); + else + AES_set_decrypt_key(key, key_len, &cdata->ks); +#ifndef AES_ASM + /* OpenSSL C functions use byte-swapped extended key. */ + padlock_bswapl(&cdata->ks); +#endif + 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 512 /* 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; + unsigned char *out; + void *iv; + int inp_misaligned, out_misaligned, realign_in_loop; + size_t chunk, allocated=0; + + /* ctx->num is maintained in byte-oriented modes, + such as CFB and OFB... */ + if ((chunk = ctx->num)) { /* borrow chunk variable */ + unsigned char *ivp=ctx->iv; + + switch (EVP_CIPHER_CTX_mode(ctx)) { + case EVP_CIPH_CFB_MODE: + if (chunk >= AES_BLOCK_SIZE) + return 0; /* bogus value */ + + if (ctx->encrypt) + while (chunknum = chunk%AES_BLOCK_SIZE; + break; + case EVP_CIPH_OFB_MODE: + if (chunk >= AES_BLOCK_SIZE) + return 0; /* bogus value */ + + while (chunknum = chunk%AES_BLOCK_SIZE; + break; + } + } + + if (nbytes == 0) + return 1; +#if 0 + if (nbytes % AES_BLOCK_SIZE) + return 0; /* are we expected to do tail processing? */ +#else + /* nbytes is always multiple of AES_BLOCK_SIZE in ECB and CBC + modes and arbitrary value in byte-oriented modes, such as + CFB and OFB... */ +#endif + + /* VIA promises CPUs that won't require alignment in the future. + For now padlock_aes_align_required is initialized to 1 and + the condition is never met... */ + /* C7 core is capable to manage unaligned input in non-ECB[!] + mode, but performance penalties appear to be approximately + same as for software alignment below or ~3x. They promise to + improve it in the future, but for now we can just as well + pretend that it can only handle aligned input... */ + if (!padlock_aes_align_required && (nbytes%AES_BLOCK_SIZE)==0) + return padlock_aes_cipher_omnivorous(ctx, out_arg, in_arg, nbytes); + + 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 && (nbytes%AES_BLOCK_SIZE)==0) + 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 = (chunkiv, 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 = padlock_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 = padlock_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 (iv = cdata->iv, ctx->iv, AES_BLOCK_SIZE); + chunk &= ~(AES_BLOCK_SIZE-1); + if (chunk) goto cfb_shortcut; + else goto cfb_skiploop; + 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 = padlock_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 = padlock_memcpy(out_arg, out, chunk) + chunk; + else + out = out_arg+=chunk; + + nbytes -= chunk; + } while (nbytes >= AES_BLOCK_SIZE); + + cfb_skiploop: + if (nbytes) { + unsigned char *ivp = cdata->iv; + + if (iv != ivp) { + memcpy(ivp, iv, AES_BLOCK_SIZE); + iv = ivp; + } + ctx->num = nbytes; + if (cdata->cword.b.encdec) { + cdata->cword.b.encdec=0; + padlock_reload_key(); + padlock_xcrypt_ecb(1,cdata,ivp,ivp); + cdata->cword.b.encdec=1; + padlock_reload_key(); + while(nbytes) { + unsigned char c = *(in_arg++); + *(out_arg++) = c ^ *ivp; + *(ivp++) = c, nbytes--; + } + } + else { padlock_reload_key(); + padlock_xcrypt_ecb(1,cdata,ivp,ivp); + padlock_reload_key(); + while (nbytes) { + *ivp = *(out_arg++) = *(in_arg++) ^ *ivp; + ivp++, nbytes--; + } + } + } + + memcpy(ctx->iv, iv, AES_BLOCK_SIZE); + break; + + case EVP_CIPH_OFB_MODE: + memcpy(cdata->iv, ctx->iv, AES_BLOCK_SIZE); + chunk &= ~(AES_BLOCK_SIZE-1); + if (chunk) do { + if (inp_misaligned) + inp = padlock_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 = padlock_memcpy(out_arg, out, chunk) + chunk; + else + out = out_arg+=chunk; + + nbytes -= chunk; + chunk = PADLOCK_CHUNK; + } while (nbytes >= AES_BLOCK_SIZE); + + if (nbytes) { + unsigned char *ivp = cdata->iv; + + ctx->num = nbytes; + padlock_reload_key(); /* empirically found */ + padlock_xcrypt_ecb(1,cdata,ivp,ivp); + padlock_reload_key(); /* empirically found */ + while (nbytes) { + *(out_arg++) = *(in_arg++) ^ *ivp; + ivp++, 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=(void *)out; + size_t n = allocated/sizeof(*p); + while (n--) *p++=0; + } + + memset(cdata->iv, 0, AES_BLOCK_SIZE); + + return 1; +} + +#endif /* OPENSSL_NO_AES */ + +/* ===== 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 */