From 5fc5d37330d3535a0f421632694d1e7918fc22d7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Tue, 8 Apr 2014 11:38:09 +0200 Subject: Compiles correctly: app/build-native + gradle. --- app/openssl/crypto/rc4/rc4_enc.c | 315 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 315 insertions(+) create mode 100644 app/openssl/crypto/rc4/rc4_enc.c (limited to 'app/openssl/crypto/rc4/rc4_enc.c') diff --git a/app/openssl/crypto/rc4/rc4_enc.c b/app/openssl/crypto/rc4/rc4_enc.c new file mode 100644 index 00000000..8c4fc6c7 --- /dev/null +++ b/app/openssl/crypto/rc4/rc4_enc.c @@ -0,0 +1,315 @@ +/* crypto/rc4/rc4_enc.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include +#include "rc4_locl.h" + +/* RC4 as implemented from a posting from + * Newsgroups: sci.crypt + * From: sterndark@netcom.com (David Sterndark) + * Subject: RC4 Algorithm revealed. + * Message-ID: + * Date: Wed, 14 Sep 1994 06:35:31 GMT + */ + +void RC4(RC4_KEY *key, size_t len, const unsigned char *indata, + unsigned char *outdata) + { + register RC4_INT *d; + register RC4_INT x,y,tx,ty; + size_t i; + + x=key->x; + y=key->y; + d=key->data; + +#if defined(RC4_CHUNK) + /* + * The original reason for implementing this(*) was the fact that + * pre-21164a Alpha CPUs don't have byte load/store instructions + * and e.g. a byte store has to be done with 64-bit load, shift, + * and, or and finally 64-bit store. Peaking data and operating + * at natural word size made it possible to reduce amount of + * instructions as well as to perform early read-ahead without + * suffering from RAW (read-after-write) hazard. This resulted + * in ~40%(**) performance improvement on 21064 box with gcc. + * But it's not only Alpha users who win here:-) Thanks to the + * early-n-wide read-ahead this implementation also exhibits + * >40% speed-up on SPARC and 20-30% on 64-bit MIPS (depending + * on sizeof(RC4_INT)). + * + * (*) "this" means code which recognizes the case when input + * and output pointers appear to be aligned at natural CPU + * word boundary + * (**) i.e. according to 'apps/openssl speed rc4' benchmark, + * crypto/rc4/rc4speed.c exhibits almost 70% speed-up... + * + * Cavets. + * + * - RC4_CHUNK="unsigned long long" should be a #1 choice for + * UltraSPARC. Unfortunately gcc generates very slow code + * (2.5-3 times slower than one generated by Sun's WorkShop + * C) and therefore gcc (at least 2.95 and earlier) should + * always be told that RC4_CHUNK="unsigned long". + * + * + */ + +# define RC4_STEP ( \ + x=(x+1) &0xff, \ + tx=d[x], \ + y=(tx+y)&0xff, \ + ty=d[y], \ + d[y]=tx, \ + d[x]=ty, \ + (RC4_CHUNK)d[(tx+ty)&0xff]\ + ) + + if ( ( ((size_t)indata & (sizeof(RC4_CHUNK)-1)) | + ((size_t)outdata & (sizeof(RC4_CHUNK)-1)) ) == 0 ) + { + RC4_CHUNK ichunk,otp; + const union { long one; char little; } is_endian = {1}; + + /* + * I reckon we can afford to implement both endian + * cases and to decide which way to take at run-time + * because the machine code appears to be very compact + * and redundant 1-2KB is perfectly tolerable (i.e. + * in case the compiler fails to eliminate it:-). By + * suggestion from Terrel Larson + * who also stands for the is_endian union:-) + * + * Special notes. + * + * - is_endian is declared automatic as doing otherwise + * (declaring static) prevents gcc from eliminating + * the redundant code; + * - compilers (those I've tried) don't seem to have + * problems eliminating either the operators guarded + * by "if (sizeof(RC4_CHUNK)==8)" or the condition + * expressions themselves so I've got 'em to replace + * corresponding #ifdefs from the previous version; + * - I chose to let the redundant switch cases when + * sizeof(RC4_CHUNK)!=8 be (were also #ifdefed + * before); + * - in case you wonder "&(sizeof(RC4_CHUNK)*8-1)" in + * [LB]ESHFT guards against "shift is out of range" + * warnings when sizeof(RC4_CHUNK)!=8 + * + * + */ + if (!is_endian.little) + { /* BIG-ENDIAN CASE */ +# define BESHFT(c) (((sizeof(RC4_CHUNK)-(c)-1)*8)&(sizeof(RC4_CHUNK)*8-1)) + for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) + { + ichunk = *(RC4_CHUNK *)indata; + otp = RC4_STEP<x=x; + key->y=y; + return; + } + else + { /* LITTLE-ENDIAN CASE */ +# define LESHFT(c) (((c)*8)&(sizeof(RC4_CHUNK)*8-1)) + for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) + { + ichunk = *(RC4_CHUNK *)indata; + otp = RC4_STEP; + otp |= RC4_STEP<<8; + otp |= RC4_STEP<<16; + otp |= RC4_STEP<<24; + if (sizeof(RC4_CHUNK)==8) + { + otp |= RC4_STEP<>= (sizeof(RC4_CHUNK)-len)<<3; + switch (len&(sizeof(RC4_CHUNK)-1)) + { + case 7: otp = RC4_STEP, i+=8; + case 6: otp |= RC4_STEP<x=x; + key->y=y; + return; + } + } +#endif +#define LOOP(in,out) \ + x=((x+1)&0xff); \ + tx=d[x]; \ + y=(tx+y)&0xff; \ + d[x]=ty=d[y]; \ + d[y]=tx; \ + (out) = d[(tx+ty)&0xff]^ (in); + +#ifndef RC4_INDEX +#define RC4_LOOP(a,b,i) LOOP(*((a)++),*((b)++)) +#else +#define RC4_LOOP(a,b,i) LOOP(a[i],b[i]) +#endif + + i=len>>3; + if (i) + { + for (;;) + { + RC4_LOOP(indata,outdata,0); + RC4_LOOP(indata,outdata,1); + RC4_LOOP(indata,outdata,2); + RC4_LOOP(indata,outdata,3); + RC4_LOOP(indata,outdata,4); + RC4_LOOP(indata,outdata,5); + RC4_LOOP(indata,outdata,6); + RC4_LOOP(indata,outdata,7); +#ifdef RC4_INDEX + indata+=8; + outdata+=8; +#endif + if (--i == 0) break; + } + } + i=len&0x07; + if (i) + { + for (;;) + { + RC4_LOOP(indata,outdata,0); if (--i == 0) break; + RC4_LOOP(indata,outdata,1); if (--i == 0) break; + RC4_LOOP(indata,outdata,2); if (--i == 0) break; + RC4_LOOP(indata,outdata,3); if (--i == 0) break; + RC4_LOOP(indata,outdata,4); if (--i == 0) break; + RC4_LOOP(indata,outdata,5); if (--i == 0) break; + RC4_LOOP(indata,outdata,6); if (--i == 0) break; + } + } + key->x=x; + key->y=y; + } -- cgit v1.2.3 From 3c3421afd8f74a3aa8d1011de07a8c18f9549210 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Tue, 8 Apr 2014 12:04:17 +0200 Subject: Rename app->bitmask_android This way, gradle commands generate apks correctly named. --- app/openssl/crypto/rc4/rc4_enc.c | 315 --------------------------------------- 1 file changed, 315 deletions(-) delete mode 100644 app/openssl/crypto/rc4/rc4_enc.c (limited to 'app/openssl/crypto/rc4/rc4_enc.c') diff --git a/app/openssl/crypto/rc4/rc4_enc.c b/app/openssl/crypto/rc4/rc4_enc.c deleted file mode 100644 index 8c4fc6c7..00000000 --- a/app/openssl/crypto/rc4/rc4_enc.c +++ /dev/null @@ -1,315 +0,0 @@ -/* crypto/rc4/rc4_enc.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * 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 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 acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS 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 AUTHOR OR 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. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include -#include "rc4_locl.h" - -/* RC4 as implemented from a posting from - * Newsgroups: sci.crypt - * From: sterndark@netcom.com (David Sterndark) - * Subject: RC4 Algorithm revealed. - * Message-ID: - * Date: Wed, 14 Sep 1994 06:35:31 GMT - */ - -void RC4(RC4_KEY *key, size_t len, const unsigned char *indata, - unsigned char *outdata) - { - register RC4_INT *d; - register RC4_INT x,y,tx,ty; - size_t i; - - x=key->x; - y=key->y; - d=key->data; - -#if defined(RC4_CHUNK) - /* - * The original reason for implementing this(*) was the fact that - * pre-21164a Alpha CPUs don't have byte load/store instructions - * and e.g. a byte store has to be done with 64-bit load, shift, - * and, or and finally 64-bit store. Peaking data and operating - * at natural word size made it possible to reduce amount of - * instructions as well as to perform early read-ahead without - * suffering from RAW (read-after-write) hazard. This resulted - * in ~40%(**) performance improvement on 21064 box with gcc. - * But it's not only Alpha users who win here:-) Thanks to the - * early-n-wide read-ahead this implementation also exhibits - * >40% speed-up on SPARC and 20-30% on 64-bit MIPS (depending - * on sizeof(RC4_INT)). - * - * (*) "this" means code which recognizes the case when input - * and output pointers appear to be aligned at natural CPU - * word boundary - * (**) i.e. according to 'apps/openssl speed rc4' benchmark, - * crypto/rc4/rc4speed.c exhibits almost 70% speed-up... - * - * Cavets. - * - * - RC4_CHUNK="unsigned long long" should be a #1 choice for - * UltraSPARC. Unfortunately gcc generates very slow code - * (2.5-3 times slower than one generated by Sun's WorkShop - * C) and therefore gcc (at least 2.95 and earlier) should - * always be told that RC4_CHUNK="unsigned long". - * - * - */ - -# define RC4_STEP ( \ - x=(x+1) &0xff, \ - tx=d[x], \ - y=(tx+y)&0xff, \ - ty=d[y], \ - d[y]=tx, \ - d[x]=ty, \ - (RC4_CHUNK)d[(tx+ty)&0xff]\ - ) - - if ( ( ((size_t)indata & (sizeof(RC4_CHUNK)-1)) | - ((size_t)outdata & (sizeof(RC4_CHUNK)-1)) ) == 0 ) - { - RC4_CHUNK ichunk,otp; - const union { long one; char little; } is_endian = {1}; - - /* - * I reckon we can afford to implement both endian - * cases and to decide which way to take at run-time - * because the machine code appears to be very compact - * and redundant 1-2KB is perfectly tolerable (i.e. - * in case the compiler fails to eliminate it:-). By - * suggestion from Terrel Larson - * who also stands for the is_endian union:-) - * - * Special notes. - * - * - is_endian is declared automatic as doing otherwise - * (declaring static) prevents gcc from eliminating - * the redundant code; - * - compilers (those I've tried) don't seem to have - * problems eliminating either the operators guarded - * by "if (sizeof(RC4_CHUNK)==8)" or the condition - * expressions themselves so I've got 'em to replace - * corresponding #ifdefs from the previous version; - * - I chose to let the redundant switch cases when - * sizeof(RC4_CHUNK)!=8 be (were also #ifdefed - * before); - * - in case you wonder "&(sizeof(RC4_CHUNK)*8-1)" in - * [LB]ESHFT guards against "shift is out of range" - * warnings when sizeof(RC4_CHUNK)!=8 - * - * - */ - if (!is_endian.little) - { /* BIG-ENDIAN CASE */ -# define BESHFT(c) (((sizeof(RC4_CHUNK)-(c)-1)*8)&(sizeof(RC4_CHUNK)*8-1)) - for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) - { - ichunk = *(RC4_CHUNK *)indata; - otp = RC4_STEP<x=x; - key->y=y; - return; - } - else - { /* LITTLE-ENDIAN CASE */ -# define LESHFT(c) (((c)*8)&(sizeof(RC4_CHUNK)*8-1)) - for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) - { - ichunk = *(RC4_CHUNK *)indata; - otp = RC4_STEP; - otp |= RC4_STEP<<8; - otp |= RC4_STEP<<16; - otp |= RC4_STEP<<24; - if (sizeof(RC4_CHUNK)==8) - { - otp |= RC4_STEP<>= (sizeof(RC4_CHUNK)-len)<<3; - switch (len&(sizeof(RC4_CHUNK)-1)) - { - case 7: otp = RC4_STEP, i+=8; - case 6: otp |= RC4_STEP<x=x; - key->y=y; - return; - } - } -#endif -#define LOOP(in,out) \ - x=((x+1)&0xff); \ - tx=d[x]; \ - y=(tx+y)&0xff; \ - d[x]=ty=d[y]; \ - d[y]=tx; \ - (out) = d[(tx+ty)&0xff]^ (in); - -#ifndef RC4_INDEX -#define RC4_LOOP(a,b,i) LOOP(*((a)++),*((b)++)) -#else -#define RC4_LOOP(a,b,i) LOOP(a[i],b[i]) -#endif - - i=len>>3; - if (i) - { - for (;;) - { - RC4_LOOP(indata,outdata,0); - RC4_LOOP(indata,outdata,1); - RC4_LOOP(indata,outdata,2); - RC4_LOOP(indata,outdata,3); - RC4_LOOP(indata,outdata,4); - RC4_LOOP(indata,outdata,5); - RC4_LOOP(indata,outdata,6); - RC4_LOOP(indata,outdata,7); -#ifdef RC4_INDEX - indata+=8; - outdata+=8; -#endif - if (--i == 0) break; - } - } - i=len&0x07; - if (i) - { - for (;;) - { - RC4_LOOP(indata,outdata,0); if (--i == 0) break; - RC4_LOOP(indata,outdata,1); if (--i == 0) break; - RC4_LOOP(indata,outdata,2); if (--i == 0) break; - RC4_LOOP(indata,outdata,3); if (--i == 0) break; - RC4_LOOP(indata,outdata,4); if (--i == 0) break; - RC4_LOOP(indata,outdata,5); if (--i == 0) break; - RC4_LOOP(indata,outdata,6); if (--i == 0) break; - } - } - key->x=x; - key->y=y; - } -- cgit v1.2.3 From 1684c8f398922065a97e7da4dac4ac6a33cc5218 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Parm=C3=A9nides=20GV?= Date: Wed, 9 Apr 2014 16:03:55 +0200 Subject: Back to the standard "app" module. This return to "app" instead of "bitmask_android" is due to this reading: https://developer.android.com/sdk/installing/studio-build.html#projectStructure I'll have to tweak the final apk name in build.gradle. --- app/openssl/crypto/rc4/rc4_enc.c | 315 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 315 insertions(+) create mode 100644 app/openssl/crypto/rc4/rc4_enc.c (limited to 'app/openssl/crypto/rc4/rc4_enc.c') diff --git a/app/openssl/crypto/rc4/rc4_enc.c b/app/openssl/crypto/rc4/rc4_enc.c new file mode 100644 index 00000000..8c4fc6c7 --- /dev/null +++ b/app/openssl/crypto/rc4/rc4_enc.c @@ -0,0 +1,315 @@ +/* crypto/rc4/rc4_enc.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include +#include "rc4_locl.h" + +/* RC4 as implemented from a posting from + * Newsgroups: sci.crypt + * From: sterndark@netcom.com (David Sterndark) + * Subject: RC4 Algorithm revealed. + * Message-ID: + * Date: Wed, 14 Sep 1994 06:35:31 GMT + */ + +void RC4(RC4_KEY *key, size_t len, const unsigned char *indata, + unsigned char *outdata) + { + register RC4_INT *d; + register RC4_INT x,y,tx,ty; + size_t i; + + x=key->x; + y=key->y; + d=key->data; + +#if defined(RC4_CHUNK) + /* + * The original reason for implementing this(*) was the fact that + * pre-21164a Alpha CPUs don't have byte load/store instructions + * and e.g. a byte store has to be done with 64-bit load, shift, + * and, or and finally 64-bit store. Peaking data and operating + * at natural word size made it possible to reduce amount of + * instructions as well as to perform early read-ahead without + * suffering from RAW (read-after-write) hazard. This resulted + * in ~40%(**) performance improvement on 21064 box with gcc. + * But it's not only Alpha users who win here:-) Thanks to the + * early-n-wide read-ahead this implementation also exhibits + * >40% speed-up on SPARC and 20-30% on 64-bit MIPS (depending + * on sizeof(RC4_INT)). + * + * (*) "this" means code which recognizes the case when input + * and output pointers appear to be aligned at natural CPU + * word boundary + * (**) i.e. according to 'apps/openssl speed rc4' benchmark, + * crypto/rc4/rc4speed.c exhibits almost 70% speed-up... + * + * Cavets. + * + * - RC4_CHUNK="unsigned long long" should be a #1 choice for + * UltraSPARC. Unfortunately gcc generates very slow code + * (2.5-3 times slower than one generated by Sun's WorkShop + * C) and therefore gcc (at least 2.95 and earlier) should + * always be told that RC4_CHUNK="unsigned long". + * + * + */ + +# define RC4_STEP ( \ + x=(x+1) &0xff, \ + tx=d[x], \ + y=(tx+y)&0xff, \ + ty=d[y], \ + d[y]=tx, \ + d[x]=ty, \ + (RC4_CHUNK)d[(tx+ty)&0xff]\ + ) + + if ( ( ((size_t)indata & (sizeof(RC4_CHUNK)-1)) | + ((size_t)outdata & (sizeof(RC4_CHUNK)-1)) ) == 0 ) + { + RC4_CHUNK ichunk,otp; + const union { long one; char little; } is_endian = {1}; + + /* + * I reckon we can afford to implement both endian + * cases and to decide which way to take at run-time + * because the machine code appears to be very compact + * and redundant 1-2KB is perfectly tolerable (i.e. + * in case the compiler fails to eliminate it:-). By + * suggestion from Terrel Larson + * who also stands for the is_endian union:-) + * + * Special notes. + * + * - is_endian is declared automatic as doing otherwise + * (declaring static) prevents gcc from eliminating + * the redundant code; + * - compilers (those I've tried) don't seem to have + * problems eliminating either the operators guarded + * by "if (sizeof(RC4_CHUNK)==8)" or the condition + * expressions themselves so I've got 'em to replace + * corresponding #ifdefs from the previous version; + * - I chose to let the redundant switch cases when + * sizeof(RC4_CHUNK)!=8 be (were also #ifdefed + * before); + * - in case you wonder "&(sizeof(RC4_CHUNK)*8-1)" in + * [LB]ESHFT guards against "shift is out of range" + * warnings when sizeof(RC4_CHUNK)!=8 + * + * + */ + if (!is_endian.little) + { /* BIG-ENDIAN CASE */ +# define BESHFT(c) (((sizeof(RC4_CHUNK)-(c)-1)*8)&(sizeof(RC4_CHUNK)*8-1)) + for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) + { + ichunk = *(RC4_CHUNK *)indata; + otp = RC4_STEP<x=x; + key->y=y; + return; + } + else + { /* LITTLE-ENDIAN CASE */ +# define LESHFT(c) (((c)*8)&(sizeof(RC4_CHUNK)*8-1)) + for (;len&(0-sizeof(RC4_CHUNK));len-=sizeof(RC4_CHUNK)) + { + ichunk = *(RC4_CHUNK *)indata; + otp = RC4_STEP; + otp |= RC4_STEP<<8; + otp |= RC4_STEP<<16; + otp |= RC4_STEP<<24; + if (sizeof(RC4_CHUNK)==8) + { + otp |= RC4_STEP<>= (sizeof(RC4_CHUNK)-len)<<3; + switch (len&(sizeof(RC4_CHUNK)-1)) + { + case 7: otp = RC4_STEP, i+=8; + case 6: otp |= RC4_STEP<x=x; + key->y=y; + return; + } + } +#endif +#define LOOP(in,out) \ + x=((x+1)&0xff); \ + tx=d[x]; \ + y=(tx+y)&0xff; \ + d[x]=ty=d[y]; \ + d[y]=tx; \ + (out) = d[(tx+ty)&0xff]^ (in); + +#ifndef RC4_INDEX +#define RC4_LOOP(a,b,i) LOOP(*((a)++),*((b)++)) +#else +#define RC4_LOOP(a,b,i) LOOP(a[i],b[i]) +#endif + + i=len>>3; + if (i) + { + for (;;) + { + RC4_LOOP(indata,outdata,0); + RC4_LOOP(indata,outdata,1); + RC4_LOOP(indata,outdata,2); + RC4_LOOP(indata,outdata,3); + RC4_LOOP(indata,outdata,4); + RC4_LOOP(indata,outdata,5); + RC4_LOOP(indata,outdata,6); + RC4_LOOP(indata,outdata,7); +#ifdef RC4_INDEX + indata+=8; + outdata+=8; +#endif + if (--i == 0) break; + } + } + i=len&0x07; + if (i) + { + for (;;) + { + RC4_LOOP(indata,outdata,0); if (--i == 0) break; + RC4_LOOP(indata,outdata,1); if (--i == 0) break; + RC4_LOOP(indata,outdata,2); if (--i == 0) break; + RC4_LOOP(indata,outdata,3); if (--i == 0) break; + RC4_LOOP(indata,outdata,4); if (--i == 0) break; + RC4_LOOP(indata,outdata,5); if (--i == 0) break; + RC4_LOOP(indata,outdata,6); if (--i == 0) break; + } + } + key->x=x; + key->y=y; + } -- cgit v1.2.3