X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fcast%2Fc_skey.c;h=0b8de76703e9a118c35c801017603b8d909d025e;hb=03dc77e07bf0f60a39872946405f1188daad3604;hp=2fc3363dcd0d1672bfd4f1c79dbc47ee2c3be195;hpb=78414a6a897db42c9bcf06aa21c705811ab33921;p=oweals%2Fopenssl.git diff --git a/crypto/cast/c_skey.c b/crypto/cast/c_skey.c index 2fc3363dcd..0b8de76703 100644 --- a/crypto/cast/c_skey.c +++ b/crypto/cast/c_skey.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 @@ -49,117 +49,119 @@ * 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 * [including the GNU Public Licence.] */ -#include "cast.h" +#include #include "cast_lcl.h" #include "cast_s.h" #define CAST_exp(l,A,a,n) \ - A[n/4]=l; \ - a[n+3]=(l )&0xff; \ - a[n+2]=(l>> 8)&0xff; \ - a[n+1]=(l>>16)&0xff; \ - a[n+0]=(l>>24)&0xff; + A[n/4]=l; \ + a[n+3]=(l )&0xff; \ + a[n+2]=(l>> 8)&0xff; \ + a[n+1]=(l>>16)&0xff; \ + a[n+0]=(l>>24)&0xff; #define S4 CAST_S_table4 #define S5 CAST_S_table5 #define S6 CAST_S_table6 #define S7 CAST_S_table7 -void CAST_set_key(key,len,data) -CAST_KEY *key; -int len; -unsigned char *data; - { - CAST_LONG x[16]; - CAST_LONG z[16]; - CAST_LONG k[32]; - CAST_LONG X[4],Z[4]; - CAST_LONG l,*K; - int i; - - for (i=0; i<16; i++) x[i]=0; - if (len > 16) len=16; - for (i=0; idata[i*2]=k[i]; - key->data[i*2+1]=((k[i+16])+16)&0x1f; - } - } - +void CAST_set_key(CAST_KEY *key, int len, const unsigned char *data) +{ + CAST_LONG x[16]; + CAST_LONG z[16]; + CAST_LONG k[32]; + CAST_LONG X[4], Z[4]; + CAST_LONG l, *K; + int i; + + for (i = 0; i < 16; i++) + x[i] = 0; + if (len > 16) + len = 16; + for (i = 0; i < len; i++) + x[i] = data[i]; + if (len <= 10) + key->short_key = 1; + else + key->short_key = 0; + + K = &k[0]; + X[0] = ((x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3]) & 0xffffffffL; + X[1] = ((x[4] << 24) | (x[5] << 16) | (x[6] << 8) | x[7]) & 0xffffffffL; + X[2] = ((x[8] << 24) | (x[9] << 16) | (x[10] << 8) | x[11]) & 0xffffffffL; + X[3] = + ((x[12] << 24) | (x[13] << 16) | (x[14] << 8) | x[15]) & 0xffffffffL; + + for (;;) { + l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; + CAST_exp(l, Z, z, 0); + l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; + CAST_exp(l, Z, z, 4); + l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; + CAST_exp(l, Z, z, 8); + l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; + CAST_exp(l, Z, z, 12); + + K[0] = S4[z[8]] ^ S5[z[9]] ^ S6[z[7]] ^ S7[z[6]] ^ S4[z[2]]; + K[1] = S4[z[10]] ^ S5[z[11]] ^ S6[z[5]] ^ S7[z[4]] ^ S5[z[6]]; + K[2] = S4[z[12]] ^ S5[z[13]] ^ S6[z[3]] ^ S7[z[2]] ^ S6[z[9]]; + K[3] = S4[z[14]] ^ S5[z[15]] ^ S6[z[1]] ^ S7[z[0]] ^ S7[z[12]]; + + l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; + CAST_exp(l, X, x, 0); + l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; + CAST_exp(l, X, x, 4); + l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; + CAST_exp(l, X, x, 8); + l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; + CAST_exp(l, X, x, 12); + + K[4] = S4[x[3]] ^ S5[x[2]] ^ S6[x[12]] ^ S7[x[13]] ^ S4[x[8]]; + K[5] = S4[x[1]] ^ S5[x[0]] ^ S6[x[14]] ^ S7[x[15]] ^ S5[x[13]]; + K[6] = S4[x[7]] ^ S5[x[6]] ^ S6[x[8]] ^ S7[x[9]] ^ S6[x[3]]; + K[7] = S4[x[5]] ^ S5[x[4]] ^ S6[x[10]] ^ S7[x[11]] ^ S7[x[7]]; + + l = X[0] ^ S4[x[13]] ^ S5[x[15]] ^ S6[x[12]] ^ S7[x[14]] ^ S6[x[8]]; + CAST_exp(l, Z, z, 0); + l = X[2] ^ S4[z[0]] ^ S5[z[2]] ^ S6[z[1]] ^ S7[z[3]] ^ S7[x[10]]; + CAST_exp(l, Z, z, 4); + l = X[3] ^ S4[z[7]] ^ S5[z[6]] ^ S6[z[5]] ^ S7[z[4]] ^ S4[x[9]]; + CAST_exp(l, Z, z, 8); + l = X[1] ^ S4[z[10]] ^ S5[z[9]] ^ S6[z[11]] ^ S7[z[8]] ^ S5[x[11]]; + CAST_exp(l, Z, z, 12); + + K[8] = S4[z[3]] ^ S5[z[2]] ^ S6[z[12]] ^ S7[z[13]] ^ S4[z[9]]; + K[9] = S4[z[1]] ^ S5[z[0]] ^ S6[z[14]] ^ S7[z[15]] ^ S5[z[12]]; + K[10] = S4[z[7]] ^ S5[z[6]] ^ S6[z[8]] ^ S7[z[9]] ^ S6[z[2]]; + K[11] = S4[z[5]] ^ S5[z[4]] ^ S6[z[10]] ^ S7[z[11]] ^ S7[z[6]]; + + l = Z[2] ^ S4[z[5]] ^ S5[z[7]] ^ S6[z[4]] ^ S7[z[6]] ^ S6[z[0]]; + CAST_exp(l, X, x, 0); + l = Z[0] ^ S4[x[0]] ^ S5[x[2]] ^ S6[x[1]] ^ S7[x[3]] ^ S7[z[2]]; + CAST_exp(l, X, x, 4); + l = Z[1] ^ S4[x[7]] ^ S5[x[6]] ^ S6[x[5]] ^ S7[x[4]] ^ S4[z[1]]; + CAST_exp(l, X, x, 8); + l = Z[3] ^ S4[x[10]] ^ S5[x[9]] ^ S6[x[11]] ^ S7[x[8]] ^ S5[z[3]]; + CAST_exp(l, X, x, 12); + + K[12] = S4[x[8]] ^ S5[x[9]] ^ S6[x[7]] ^ S7[x[6]] ^ S4[x[3]]; + K[13] = S4[x[10]] ^ S5[x[11]] ^ S6[x[5]] ^ S7[x[4]] ^ S5[x[7]]; + K[14] = S4[x[12]] ^ S5[x[13]] ^ S6[x[3]] ^ S7[x[2]] ^ S6[x[8]]; + K[15] = S4[x[14]] ^ S5[x[15]] ^ S6[x[1]] ^ S7[x[0]] ^ S7[x[13]]; + if (K != k) + break; + K += 16; + } + + for (i = 0; i < 16; i++) { + key->data[i * 2] = k[i]; + key->data[i * 2 + 1] = ((k[i + 16]) + 16) & 0x1f; + } +}