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Diffstat (limited to 'src/lib/libcrypto/rc4/rc4_skey.c')
| -rw-r--r-- | src/lib/libcrypto/rc4/rc4_skey.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/lib/libcrypto/rc4/rc4_skey.c b/src/lib/libcrypto/rc4/rc4_skey.c new file mode 100644 index 0000000000..46b77ec321 --- /dev/null +++ b/src/lib/libcrypto/rc4/rc4_skey.c | |||
| @@ -0,0 +1,151 @@ | |||
| 1 | /* crypto/rc4/rc4_skey.c */ | ||
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | ||
| 3 | * All rights reserved. | ||
| 4 | * | ||
| 5 | * This package is an SSL implementation written | ||
| 6 | * by Eric Young (eay@cryptsoft.com). | ||
| 7 | * The implementation was written so as to conform with Netscapes SSL. | ||
| 8 | * | ||
| 9 | * This library is free for commercial and non-commercial use as long as | ||
| 10 | * the following conditions are aheared to. The following conditions | ||
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, | ||
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | ||
| 13 | * included with this distribution is covered by the same copyright terms | ||
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | ||
| 15 | * | ||
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in | ||
| 17 | * the code are not to be removed. | ||
| 18 | * If this package is used in a product, Eric Young should be given attribution | ||
| 19 | * as the author of the parts of the library used. | ||
| 20 | * This can be in the form of a textual message at program startup or | ||
| 21 | * in documentation (online or textual) provided with the package. | ||
| 22 | * | ||
| 23 | * Redistribution and use in source and binary forms, with or without | ||
| 24 | * modification, are permitted provided that the following conditions | ||
| 25 | * are met: | ||
| 26 | * 1. Redistributions of source code must retain the copyright | ||
| 27 | * notice, this list of conditions and the following disclaimer. | ||
| 28 | * 2. Redistributions in binary form must reproduce the above copyright | ||
| 29 | * notice, this list of conditions and the following disclaimer in the | ||
| 30 | * documentation and/or other materials provided with the distribution. | ||
| 31 | * 3. All advertising materials mentioning features or use of this software | ||
| 32 | * must display the following acknowledgement: | ||
| 33 | * "This product includes cryptographic software written by | ||
| 34 | * Eric Young (eay@cryptsoft.com)" | ||
| 35 | * The word 'cryptographic' can be left out if the rouines from the library | ||
| 36 | * being used are not cryptographic related :-). | ||
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from | ||
| 38 | * the apps directory (application code) you must include an acknowledgement: | ||
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | ||
| 40 | * | ||
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | ||
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
| 51 | * SUCH DAMAGE. | ||
| 52 | * | ||
| 53 | * The licence and distribution terms for any publically available version or | ||
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | ||
| 55 | * copied and put under another distribution licence | ||
| 56 | * [including the GNU Public Licence.] | ||
| 57 | */ | ||
| 58 | |||
| 59 | #include <openssl/rc4.h> | ||
| 60 | #include "rc4_locl.h" | ||
| 61 | #include <openssl/opensslv.h> | ||
| 62 | |||
| 63 | const char RC4_version[]="RC4" OPENSSL_VERSION_PTEXT; | ||
| 64 | |||
| 65 | const char *RC4_options(void) | ||
| 66 | { | ||
| 67 | #ifdef RC4_INDEX | ||
| 68 | if (sizeof(RC4_INT) == 1) | ||
| 69 | return("rc4(idx,char)"); | ||
| 70 | else | ||
| 71 | return("rc4(idx,int)"); | ||
| 72 | #else | ||
| 73 | if (sizeof(RC4_INT) == 1) | ||
| 74 | return("rc4(ptr,char)"); | ||
| 75 | else | ||
| 76 | return("rc4(ptr,int)"); | ||
| 77 | #endif | ||
| 78 | } | ||
| 79 | |||
| 80 | /* RC4 as implemented from a posting from | ||
| 81 | * Newsgroups: sci.crypt | ||
| 82 | * From: sterndark@netcom.com (David Sterndark) | ||
| 83 | * Subject: RC4 Algorithm revealed. | ||
| 84 | * Message-ID: <sternCvKL4B.Hyy@netcom.com> | ||
| 85 | * Date: Wed, 14 Sep 1994 06:35:31 GMT | ||
| 86 | */ | ||
| 87 | |||
| 88 | void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data) | ||
| 89 | { | ||
| 90 | register RC4_INT tmp; | ||
| 91 | register int id1,id2; | ||
| 92 | register RC4_INT *d; | ||
| 93 | unsigned int i; | ||
| 94 | |||
| 95 | d= &(key->data[0]); | ||
| 96 | key->x = 0; | ||
| 97 | key->y = 0; | ||
| 98 | id1=id2=0; | ||
| 99 | |||
| 100 | #define SK_LOOP(d,n) { \ | ||
| 101 | tmp=d[(n)]; \ | ||
| 102 | id2 = (data[id1] + tmp + id2) & 0xff; \ | ||
| 103 | if (++id1 == len) id1=0; \ | ||
| 104 | d[(n)]=d[id2]; \ | ||
| 105 | d[id2]=tmp; } | ||
| 106 | |||
| 107 | #if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) | ||
| 108 | # if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \ | ||
| 109 | defined(__INTEL__) || \ | ||
| 110 | defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) | ||
| 111 | if (sizeof(RC4_INT) > 1) { | ||
| 112 | /* | ||
| 113 | * Unlike all other x86 [and x86_64] implementations, | ||
| 114 | * Intel P4 core [including EM64T] was found to perform | ||
| 115 | * poorly with wider RC4_INT. Performance improvement | ||
| 116 | * for IA-32 hand-coded assembler turned out to be 2.8x | ||
| 117 | * if re-coded for RC4_CHAR! It's however inappropriate | ||
| 118 | * to just switch to RC4_CHAR for x86[_64], as non-P4 | ||
| 119 | * implementations suffer from significant performance | ||
| 120 | * losses then, e.g. PIII exhibits >2x deterioration, | ||
| 121 | * and so does Opteron. In order to assure optimal | ||
| 122 | * all-round performance, we detect P4 at run-time by | ||
| 123 | * checking upon reserved bit 20 in CPU capability | ||
| 124 | * vector and set up compressed key schedule, which is | ||
| 125 | * recognized by correspondingly updated assembler | ||
| 126 | * module... Bit 20 is set up by OPENSSL_ia32_cpuid. | ||
| 127 | * | ||
| 128 | * <appro@fy.chalmers.se> | ||
| 129 | */ | ||
| 130 | if (OPENSSL_ia32cap_P & (1<<20)) { | ||
| 131 | unsigned char *cp=(unsigned char *)d; | ||
| 132 | |||
| 133 | for (i=0;i<256;i++) cp[i]=i; | ||
| 134 | for (i=0;i<256;i++) SK_LOOP(cp,i); | ||
| 135 | /* mark schedule as compressed! */ | ||
| 136 | d[256/sizeof(RC4_INT)]=-1; | ||
| 137 | return; | ||
| 138 | } | ||
| 139 | } | ||
| 140 | # endif | ||
| 141 | #endif | ||
| 142 | for (i=0; i < 256; i++) d[i]=i; | ||
| 143 | for (i=0; i < 256; i+=4) | ||
| 144 | { | ||
| 145 | SK_LOOP(d,i+0); | ||
| 146 | SK_LOOP(d,i+1); | ||
| 147 | SK_LOOP(d,i+2); | ||
| 148 | SK_LOOP(d,i+3); | ||
| 149 | } | ||
| 150 | } | ||
| 151 | |||
