**diff options**

Diffstat (limited to 'crypto/rc2/rc2ofb64.c')

-rw-r--r-- | crypto/rc2/rc2ofb64.c | 105 |

1 files changed, 52 insertions, 53 deletions

diff --git a/crypto/rc2/rc2ofb64.c b/crypto/rc2/rc2ofb64.c index 9e297867ed56..b9f4d8c35bb0 100644 --- a/crypto/rc2/rc2ofb64.c +++ b/crypto/rc2/rc2ofb64.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 @@ -59,53 +59,52 @@ #include <openssl/rc2.h> #include "rc2_locl.h" -/* The input and output encrypted as though 64bit ofb mode is being - * used. The extra state information to record how much of the - * 64bit block we have used is contained in *num; +/* + * The input and output encrypted as though 64bit ofb mode is being used. + * The extra state information to record how much of the 64bit block we have + * used is contained in *num; */ void RC2_ofb64_encrypt(const unsigned char *in, unsigned char *out, - long length, RC2_KEY *schedule, unsigned char *ivec, - int *num) - { - register unsigned long v0,v1,t; - register int n= *num; - register long l=length; - unsigned char d[8]; - register char *dp; - unsigned long ti[2]; - unsigned char *iv; - int save=0; - - iv=(unsigned char *)ivec; - c2l(iv,v0); - c2l(iv,v1); - ti[0]=v0; - ti[1]=v1; - dp=(char *)d; - l2c(v0,dp); - l2c(v1,dp); - while (l--) - { - if (n == 0) - { - RC2_encrypt((unsigned long *)ti,schedule); - dp=(char *)d; - t=ti[0]; l2c(t,dp); - t=ti[1]; l2c(t,dp); - save++; - } - *(out++)= *(in++)^d[n]; - n=(n+1)&0x07; - } - if (save) - { - v0=ti[0]; - v1=ti[1]; - iv=(unsigned char *)ivec; - l2c(v0,iv); - l2c(v1,iv); - } - t=v0=v1=ti[0]=ti[1]=0; - *num=n; - } + long length, RC2_KEY *schedule, unsigned char *ivec, + int *num) +{ + register unsigned long v0, v1, t; + register int n = *num; + register long l = length; + unsigned char d[8]; + register char *dp; + unsigned long ti[2]; + unsigned char *iv; + int save = 0; + iv = (unsigned char *)ivec; + c2l(iv, v0); + c2l(iv, v1); + ti[0] = v0; + ti[1] = v1; + dp = (char *)d; + l2c(v0, dp); + l2c(v1, dp); + while (l--) { + if (n == 0) { + RC2_encrypt((unsigned long *)ti, schedule); + dp = (char *)d; + t = ti[0]; + l2c(t, dp); + t = ti[1]; + l2c(t, dp); + save++; + } + *(out++) = *(in++) ^ d[n]; + n = (n + 1) & 0x07; + } + if (save) { + v0 = ti[0]; + v1 = ti[1]; + iv = (unsigned char *)ivec; + l2c(v0, iv); + l2c(v1, iv); + } + t = v0 = v1 = ti[0] = ti[1] = 0; + *num = n; +} |