diff options
Diffstat (limited to 'crypto/des/cbc_cksm.c')
| -rw-r--r-- | crypto/des/cbc_cksm.c | 97 |
1 files changed, 47 insertions, 50 deletions
diff --git a/crypto/des/cbc_cksm.c b/crypto/des/cbc_cksm.c index 09a7ba56aada..f89b5b98e42a 100644 --- a/crypto/des/cbc_cksm.c +++ b/crypto/des/cbc_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 @@ -49,7 +49,7 @@ * 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 @@ -59,48 +59,45 @@ #include "des_locl.h" DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, - long length, DES_key_schedule *schedule, - const_DES_cblock *ivec) - { - register DES_LONG tout0,tout1,tin0,tin1; - register long l=length; - DES_LONG tin[2]; - unsigned char *out = &(*output)[0]; - const unsigned char *iv = &(*ivec)[0]; + long length, DES_key_schedule *schedule, + const_DES_cblock *ivec) +{ + register DES_LONG tout0, tout1, tin0, tin1; + register long l = length; + DES_LONG tin[2]; + unsigned char *out = &(*output)[0]; + const unsigned char *iv = &(*ivec)[0]; + + c2l(iv, tout0); + c2l(iv, tout1); + for (; l > 0; l -= 8) { + if (l >= 8) { + c2l(in, tin0); + c2l(in, tin1); + } else + c2ln(in, tin0, tin1, l); - c2l(iv,tout0); - c2l(iv,tout1); - for (; l>0; l-=8) - { - if (l >= 8) - { - c2l(in,tin0); - c2l(in,tin1); - } - else - c2ln(in,tin0,tin1,l); - - tin0^=tout0; tin[0]=tin0; - tin1^=tout1; tin[1]=tin1; - DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); - /* fix 15/10/91 eay - thanks to keithr@sco.COM */ - tout0=tin[0]; - tout1=tin[1]; - } - if (out != NULL) - { - l2c(tout0,out); - l2c(tout1,out); - } - tout0=tin0=tin1=tin[0]=tin[1]=0; - /* - Transform the data in tout1 so that it will - match the return value that the MIT Kerberos - mit_des_cbc_cksum API returns. - */ - tout1 = ((tout1 >> 24L) & 0x000000FF) - | ((tout1 >> 8L) & 0x0000FF00) - | ((tout1 << 8L) & 0x00FF0000) - | ((tout1 << 24L) & 0xFF000000); - return(tout1); - } + tin0 ^= tout0; + tin[0] = tin0; + tin1 ^= tout1; + tin[1] = tin1; + DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); + /* fix 15/10/91 eay - thanks to keithr@sco.COM */ + tout0 = tin[0]; + tout1 = tin[1]; + } + if (out != NULL) { + l2c(tout0, out); + l2c(tout1, out); + } + tout0 = tin0 = tin1 = tin[0] = tin[1] = 0; + /* + * Transform the data in tout1 so that it will match the return value + * that the MIT Kerberos mit_des_cbc_cksum API returns. + */ + tout1 = ((tout1 >> 24L) & 0x000000FF) + | ((tout1 >> 8L) & 0x0000FF00) + | ((tout1 << 8L) & 0x00FF0000) + | ((tout1 << 24L) & 0xFF000000); + return (tout1); +} |