diff options
Diffstat (limited to 'openssl/crypto/des/qud_cksm.c')
| -rw-r--r-- | openssl/crypto/des/qud_cksm.c | 136 |
1 files changed, 70 insertions, 66 deletions
diff --git a/openssl/crypto/des/qud_cksm.c b/openssl/crypto/des/qud_cksm.c index dac201227..2a168a576 100644 --- a/openssl/crypto/des/qud_cksm.c +++ b/openssl/crypto/des/qud_cksm.c @@ -5,21 +5,21 @@ * 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: @@ -34,10 +34,10 @@ * 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 + * 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 @@ -49,91 +49,95 @@ * 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.] */ -/* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer - * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40 - * This module in only based on the code in this paper and is - * almost definitely not the same as the MIT implementation. +/* + * From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer IEEE + * Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40 This module in + * only based on the code in this paper and is almost definitely not the same + * as the MIT implementation. */ #include "des_locl.h" /* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */ -#define Q_B0(a) (((DES_LONG)(a))) -#define Q_B1(a) (((DES_LONG)(a))<<8) -#define Q_B2(a) (((DES_LONG)(a))<<16) -#define Q_B3(a) (((DES_LONG)(a))<<24) +#define Q_B0(a) (((DES_LONG)(a))) +#define Q_B1(a) (((DES_LONG)(a))<<8) +#define Q_B2(a) (((DES_LONG)(a))<<16) +#define Q_B3(a) (((DES_LONG)(a))<<24) /* used to scramble things a bit */ /* Got the value MIT uses via brute force :-) 2/10/90 eay */ -#define NOISE ((DES_LONG)83653421L) +#define NOISE ((DES_LONG)83653421L) DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[], - long length, int out_count, DES_cblock *seed) - { - DES_LONG z0,z1,t0,t1; - int i; - long l; - const unsigned char *cp; + long length, int out_count, DES_cblock *seed) +{ + DES_LONG z0, z1, t0, t1; + int i; + long l; + const unsigned char *cp; #ifdef _CRAY - struct lp_st { int a:32; int b:32; } *lp; + struct lp_st { + int a:32; + int b:32; + } *lp; #else - DES_LONG *lp; + DES_LONG *lp; #endif - if (out_count < 1) out_count=1; + if (out_count < 1) + out_count = 1; #ifdef _CRAY - lp = (struct lp_st *) &(output[0])[0]; + lp = (struct lp_st *)&(output[0])[0]; #else - lp = (DES_LONG *) &(output[0])[0]; + lp = (DES_LONG *)&(output[0])[0]; #endif - z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]); - z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]); + z0 = Q_B0((*seed)[0]) | Q_B1((*seed)[1]) | Q_B2((*seed)[2]) | + Q_B3((*seed)[3]); + z1 = Q_B0((*seed)[4]) | Q_B1((*seed)[5]) | Q_B2((*seed)[6]) | + Q_B3((*seed)[7]); - for (i=0; ((i<4)&&(i<out_count)); i++) - { - cp=input; - l=length; - while (l > 0) - { - if (l > 1) - { - t0= (DES_LONG)(*(cp++)); - t0|=(DES_LONG)Q_B1(*(cp++)); - l--; - } - else - t0= (DES_LONG)(*(cp++)); - l--; - /* add */ - t0+=z0; - t0&=0xffffffffL; - t1=z1; - /* square, well sort of square */ - z0=((((t0*t0)&0xffffffffL)+((t1*t1)&0xffffffffL)) - &0xffffffffL)%0x7fffffffL; - z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL; - } - if (lp != NULL) - { - /* The MIT library assumes that the checksum is - * composed of 2*out_count 32 bit ints */ + for (i = 0; ((i < 4) && (i < out_count)); i++) { + cp = input; + l = length; + while (l > 0) { + if (l > 1) { + t0 = (DES_LONG)(*(cp++)); + t0 |= (DES_LONG)Q_B1(*(cp++)); + l--; + } else + t0 = (DES_LONG)(*(cp++)); + l--; + /* add */ + t0 += z0; + t0 &= 0xffffffffL; + t1 = z1; + /* square, well sort of square */ + z0 = ((((t0 * t0) & 0xffffffffL) + ((t1 * t1) & 0xffffffffL)) + & 0xffffffffL) % 0x7fffffffL; + z1 = ((t0 * ((t1 + NOISE) & 0xffffffffL)) & 0xffffffffL) % + 0x7fffffffL; + } + if (lp != NULL) { + /* + * The MIT library assumes that the checksum is composed of + * 2*out_count 32 bit ints + */ #ifdef _CRAY - (*lp).a = z0; - (*lp).b = z1; - lp++; + (*lp).a = z0; + (*lp).b = z1; + lp++; #else - *lp++ = z0; - *lp++ = z1; + *lp++ = z0; + *lp++ = z1; #endif - } - } - return(z0); - } - + } + } + return (z0); +} |