diff options
Diffstat (limited to 'openssl/crypto/des/pcbc_enc.c')
| -rw-r--r-- | openssl/crypto/des/pcbc_enc.c | 124 |
1 files changed, 58 insertions, 66 deletions
diff --git a/openssl/crypto/des/pcbc_enc.c b/openssl/crypto/des/pcbc_enc.c index 17a40f952..144d5ed88 100644 --- a/openssl/crypto/des/pcbc_enc.c +++ b/openssl/crypto/des/pcbc_enc.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 @@ -59,65 +59,57 @@ #include "des_locl.h" void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output, - long length, DES_key_schedule *schedule, - DES_cblock *ivec, int enc) - { - register DES_LONG sin0,sin1,xor0,xor1,tout0,tout1; - DES_LONG tin[2]; - const unsigned char *in; - unsigned char *out,*iv; + long length, DES_key_schedule *schedule, + DES_cblock *ivec, int enc) +{ + register DES_LONG sin0, sin1, xor0, xor1, tout0, tout1; + DES_LONG tin[2]; + const unsigned char *in; + unsigned char *out, *iv; - in=input; - out=output; - iv = &(*ivec)[0]; + in = input; + out = output; + iv = &(*ivec)[0]; - if (enc) - { - c2l(iv,xor0); - c2l(iv,xor1); - for (; length>0; length-=8) - { - if (length >= 8) - { - c2l(in,sin0); - c2l(in,sin1); - } - else - c2ln(in,sin0,sin1,length); - tin[0]=sin0^xor0; - tin[1]=sin1^xor1; - DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); - tout0=tin[0]; - tout1=tin[1]; - xor0=sin0^tout0; - xor1=sin1^tout1; - l2c(tout0,out); - l2c(tout1,out); - } - } - else - { - c2l(iv,xor0); c2l(iv,xor1); - for (; length>0; length-=8) - { - c2l(in,sin0); - c2l(in,sin1); - tin[0]=sin0; - tin[1]=sin1; - DES_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT); - tout0=tin[0]^xor0; - tout1=tin[1]^xor1; - if (length >= 8) - { - l2c(tout0,out); - l2c(tout1,out); - } - else - l2cn(tout0,tout1,out,length); - xor0=tout0^sin0; - xor1=tout1^sin1; - } - } - tin[0]=tin[1]=0; - sin0=sin1=xor0=xor1=tout0=tout1=0; - } + if (enc) { + c2l(iv, xor0); + c2l(iv, xor1); + for (; length > 0; length -= 8) { + if (length >= 8) { + c2l(in, sin0); + c2l(in, sin1); + } else + c2ln(in, sin0, sin1, length); + tin[0] = sin0 ^ xor0; + tin[1] = sin1 ^ xor1; + DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); + tout0 = tin[0]; + tout1 = tin[1]; + xor0 = sin0 ^ tout0; + xor1 = sin1 ^ tout1; + l2c(tout0, out); + l2c(tout1, out); + } + } else { + c2l(iv, xor0); + c2l(iv, xor1); + for (; length > 0; length -= 8) { + c2l(in, sin0); + c2l(in, sin1); + tin[0] = sin0; + tin[1] = sin1; + DES_encrypt1((DES_LONG *)tin, schedule, DES_DECRYPT); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + if (length >= 8) { + l2c(tout0, out); + l2c(tout1, out); + } else + l2cn(tout0, tout1, out, length); + xor0 = tout0 ^ sin0; + xor1 = tout1 ^ sin1; + } + } + tin[0] = tin[1] = 0; + sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0; +} |