diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/cast/c_skey.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/cast/c_skey.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/cast/c_skey.c b/openssl-1.1.0h/crypto/cast/c_skey.c new file mode 100644 index 0000000..962d2a6 --- /dev/null +++ b/openssl-1.1.0h/crypto/cast/c_skey.c @@ -0,0 +1,118 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <openssl/cast.h> +#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; + +#define S4 CAST_S_table4 +#define S5 CAST_S_table5 +#define S6 CAST_S_table6 +#define S7 CAST_S_table7 + +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; + } +} |