X-Git-Url: https://git.openssl.org/gitweb/?a=blobdiff_plain;f=crypto%2Frc5%2Frc5_enc.c;fp=crypto%2Frc5%2Frc5_enc.c;h=06b89d83a1a872b5886b46bd10f5f85cc8ae6b4c;hb=0f113f3ee4d629ef9a4a30911b22b224772085e5;hp=f327d32a766084bad0ea57dbe4f862da0525d1bc;hpb=22b52164aaed31d6e93dbd2d397ace041360e6aa;p=openssl.git diff --git a/crypto/rc5/rc5_enc.c b/crypto/rc5/rc5_enc.c index f327d32a76..06b89d83a1 100644 --- a/crypto/rc5/rc5_enc.c +++ b/crypto/rc5/rc5_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 @@ -61,155 +61,149 @@ #include "rc5_locl.h" void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out, - long length, RC5_32_KEY *ks, unsigned char *iv, - int encrypt) - { - register unsigned long tin0,tin1; - register unsigned long tout0,tout1,xor0,xor1; - register long l=length; - unsigned long tin[2]; + long length, RC5_32_KEY *ks, unsigned char *iv, + int encrypt) +{ + register unsigned long tin0, tin1; + register unsigned long tout0, tout1, xor0, xor1; + register long l = length; + unsigned long tin[2]; - if (encrypt) - { - c2l(iv,tout0); - c2l(iv,tout1); - iv-=8; - for (l-=8; l>=0; l-=8) - { - c2l(in,tin0); - c2l(in,tin1); - tin0^=tout0; - tin1^=tout1; - tin[0]=tin0; - tin[1]=tin1; - RC5_32_encrypt(tin,ks); - tout0=tin[0]; l2c(tout0,out); - tout1=tin[1]; l2c(tout1,out); - } - if (l != -8) - { - c2ln(in,tin0,tin1,l+8); - tin0^=tout0; - tin1^=tout1; - tin[0]=tin0; - tin[1]=tin1; - RC5_32_encrypt(tin,ks); - tout0=tin[0]; l2c(tout0,out); - tout1=tin[1]; l2c(tout1,out); - } - l2c(tout0,iv); - l2c(tout1,iv); - } - else - { - c2l(iv,xor0); - c2l(iv,xor1); - iv-=8; - for (l-=8; l>=0; l-=8) - { - c2l(in,tin0); tin[0]=tin0; - c2l(in,tin1); tin[1]=tin1; - RC5_32_decrypt(tin,ks); - tout0=tin[0]^xor0; - tout1=tin[1]^xor1; - l2c(tout0,out); - l2c(tout1,out); - xor0=tin0; - xor1=tin1; - } - if (l != -8) - { - c2l(in,tin0); tin[0]=tin0; - c2l(in,tin1); tin[1]=tin1; - RC5_32_decrypt(tin,ks); - tout0=tin[0]^xor0; - tout1=tin[1]^xor1; - l2cn(tout0,tout1,out,l+8); - xor0=tin0; - xor1=tin1; - } - l2c(xor0,iv); - l2c(xor1,iv); - } - tin0=tin1=tout0=tout1=xor0=xor1=0; - tin[0]=tin[1]=0; - } + if (encrypt) { + c2l(iv, tout0); + c2l(iv, tout1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + c2l(in, tin1); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC5_32_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + if (l != -8) { + c2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC5_32_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + l2c(tout0, iv); + l2c(tout1, iv); + } else { + c2l(iv, xor0); + c2l(iv, xor1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC5_32_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2c(tout0, out); + l2c(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC5_32_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2cn(tout0, tout1, out, l + 8); + xor0 = tin0; + xor1 = tin1; + } + l2c(xor0, iv); + l2c(xor1, iv); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key) - { - RC5_32_INT a,b,*s; +{ + RC5_32_INT a, b, *s; - s=key->data; + s = key->data; - a=d[0]+s[0]; - b=d[1]+s[1]; - E_RC5_32(a,b,s, 2); - E_RC5_32(a,b,s, 4); - E_RC5_32(a,b,s, 6); - E_RC5_32(a,b,s, 8); - E_RC5_32(a,b,s,10); - E_RC5_32(a,b,s,12); - E_RC5_32(a,b,s,14); - E_RC5_32(a,b,s,16); - if (key->rounds == 12) - { - E_RC5_32(a,b,s,18); - E_RC5_32(a,b,s,20); - E_RC5_32(a,b,s,22); - E_RC5_32(a,b,s,24); - } - else if (key->rounds == 16) - { - /* Do a full expansion to avoid a jump */ - E_RC5_32(a,b,s,18); - E_RC5_32(a,b,s,20); - E_RC5_32(a,b,s,22); - E_RC5_32(a,b,s,24); - E_RC5_32(a,b,s,26); - E_RC5_32(a,b,s,28); - E_RC5_32(a,b,s,30); - E_RC5_32(a,b,s,32); - } - d[0]=a; - d[1]=b; - } + a = d[0] + s[0]; + b = d[1] + s[1]; + E_RC5_32(a, b, s, 2); + E_RC5_32(a, b, s, 4); + E_RC5_32(a, b, s, 6); + E_RC5_32(a, b, s, 8); + E_RC5_32(a, b, s, 10); + E_RC5_32(a, b, s, 12); + E_RC5_32(a, b, s, 14); + E_RC5_32(a, b, s, 16); + if (key->rounds == 12) { + E_RC5_32(a, b, s, 18); + E_RC5_32(a, b, s, 20); + E_RC5_32(a, b, s, 22); + E_RC5_32(a, b, s, 24); + } else if (key->rounds == 16) { + /* Do a full expansion to avoid a jump */ + E_RC5_32(a, b, s, 18); + E_RC5_32(a, b, s, 20); + E_RC5_32(a, b, s, 22); + E_RC5_32(a, b, s, 24); + E_RC5_32(a, b, s, 26); + E_RC5_32(a, b, s, 28); + E_RC5_32(a, b, s, 30); + E_RC5_32(a, b, s, 32); + } + d[0] = a; + d[1] = b; +} void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key) - { - RC5_32_INT a,b,*s; - - s=key->data; +{ + RC5_32_INT a, b, *s; - a=d[0]; - b=d[1]; - if (key->rounds == 16) - { - D_RC5_32(a,b,s,32); - D_RC5_32(a,b,s,30); - D_RC5_32(a,b,s,28); - D_RC5_32(a,b,s,26); - /* Do a full expansion to avoid a jump */ - D_RC5_32(a,b,s,24); - D_RC5_32(a,b,s,22); - D_RC5_32(a,b,s,20); - D_RC5_32(a,b,s,18); - } - else if (key->rounds == 12) - { - D_RC5_32(a,b,s,24); - D_RC5_32(a,b,s,22); - D_RC5_32(a,b,s,20); - D_RC5_32(a,b,s,18); - } - D_RC5_32(a,b,s,16); - D_RC5_32(a,b,s,14); - D_RC5_32(a,b,s,12); - D_RC5_32(a,b,s,10); - D_RC5_32(a,b,s, 8); - D_RC5_32(a,b,s, 6); - D_RC5_32(a,b,s, 4); - D_RC5_32(a,b,s, 2); - d[0]=a-s[0]; - d[1]=b-s[1]; - } + s = key->data; + a = d[0]; + b = d[1]; + if (key->rounds == 16) { + D_RC5_32(a, b, s, 32); + D_RC5_32(a, b, s, 30); + D_RC5_32(a, b, s, 28); + D_RC5_32(a, b, s, 26); + /* Do a full expansion to avoid a jump */ + D_RC5_32(a, b, s, 24); + D_RC5_32(a, b, s, 22); + D_RC5_32(a, b, s, 20); + D_RC5_32(a, b, s, 18); + } else if (key->rounds == 12) { + D_RC5_32(a, b, s, 24); + D_RC5_32(a, b, s, 22); + D_RC5_32(a, b, s, 20); + D_RC5_32(a, b, s, 18); + } + D_RC5_32(a, b, s, 16); + D_RC5_32(a, b, s, 14); + D_RC5_32(a, b, s, 12); + D_RC5_32(a, b, s, 10); + D_RC5_32(a, b, s, 8); + D_RC5_32(a, b, s, 6); + D_RC5_32(a, b, s, 4); + D_RC5_32(a, b, s, 2); + d[0] = a - s[0]; + d[1] = b - s[1]; +}