diff options
Diffstat (limited to 'crypto/des/ofb_enc.c')
| -rw-r--r-- | crypto/des/ofb_enc.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/crypto/des/ofb_enc.c b/crypto/des/ofb_enc.c index 9b2ecb6749..4db0cdbd60 100644 --- a/crypto/des/ofb_enc.c +++ b/crypto/des/ofb_enc.c @@ -1,5 +1,5 @@ /* crypto/des/ofb_enc.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written @@ -72,7 +72,7 @@ long length; des_key_schedule schedule; des_cblock (*ivec); { - register DES_LONG d0,d1,v0,v1,n=(numbits+7)/8; + register DES_LONG d0,d1,vv0,vv1,v0,v1,n=(numbits+7)/8; register DES_LONG mask0,mask1; register long l=length; register int num=numbits; @@ -94,7 +94,7 @@ des_cblock (*ivec); mask0=0xffffffffL; else mask0=(1L<<num)-1; - mask1=0x00000000; + mask1=0x00000000L; } iv=(unsigned char *)ivec; @@ -104,19 +104,36 @@ des_cblock (*ivec); ti[1]=v1; while (l-- > 0) { + ti[0]=v0; + ti[1]=v1; des_encrypt((DES_LONG *)ti,schedule,DES_ENCRYPT); + vv0=ti[0]; + vv1=ti[1]; c2ln(in,d0,d1,n); in+=n; - d0=(d0^ti[0])&mask0; - d1=(d1^ti[1])&mask1; + d0=(d0^vv0)&mask0; + d1=(d1^vv1)&mask1; l2cn(d0,d1,out,n); out+=n; + + if (num == 32) + { v0=v1; v1=vv0; } + else if (num == 64) + { v0=vv0; v1=vv1; } + else if (num > 32) /* && num != 64 */ + { + v0=((v1>>(num-32))|(vv0<<(64-num)))&0xffffffffL; + v1=((vv0>>(num-32))|(vv1<<(64-num)))&0xffffffffL; + } + else /* num < 32 */ + { + v0=((v0>>num)|(v1<<(32-num)))&0xffffffffL; + v1=((v1>>num)|(vv0<<(32-num)))&0xffffffffL; + } } - v0=ti[0]; - v1=ti[1]; iv=(unsigned char *)ivec; l2c(v0,iv); l2c(v1,iv); - v0=v1=d0=d1=ti[0]=ti[1]=0; + v0=v1=d0=d1=ti[0]=ti[1]=vv0=vv1=0; } |