diff options
Diffstat (limited to 'src/common/des.c')
| -rw-r--r-- | src/common/des.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/common/des.c b/src/common/des.c index c680610e9..73297ab70 100644 --- a/src/common/des.c +++ b/src/common/des.c @@ -23,6 +23,7 @@ #include "des.h" #include "common/cbasetypes.h" +#include "common/nullpo.h" /** @file * Implementation of the des interface. @@ -54,6 +55,7 @@ static void des_IP(struct des_bit64 *src) struct des_bit64 tmp = {{0}}; int i; + nullpo_retv(src); for(i = 0; i < ARRAYLENGTH(ip_table); ++i) { uint8_t j = ip_table[i] - 1; if (src->b[(j >> 3) & 7] & mask[j & 7]) @@ -81,6 +83,7 @@ static void des_FP(struct des_bit64 *src) struct des_bit64 tmp = {{0}}; int i; + nullpo_retv(src); for (i = 0; i < ARRAYLENGTH(fp_table); ++i) { uint8_t j = fp_table[i] - 1; if (src->b[(j >> 3) & 7] & mask[j & 7]) @@ -119,6 +122,7 @@ static void des_E(struct des_bit64 *src) tmp.b[i / 6 + 0] |= mask[i % 6]; } #endif + nullpo_retv(src); // optimized tmp.b[0] = ((src->b[7]<<5) | (src->b[4]>>3)) & 0x3f; // ..0 vutsr tmp.b[1] = ((src->b[4]<<1) | (src->b[5]>>7)) & 0x3f; // ..srqpo n @@ -150,6 +154,7 @@ static void des_TP(struct des_bit64 *src) struct des_bit64 tmp = {{0}}; int i; + nullpo_retv(src); for (i = 0; i < ARRAYLENGTH(tp_table); ++i) { uint8_t j = tp_table[i] - 1; if (src->b[(j >> 3) + 0] & mask[j & 7]) @@ -194,6 +199,7 @@ static void des_SBOX(struct des_bit64 *src) struct des_bit64 tmp = {{0}}; int i; + nullpo_retv(src); for (i = 0; i < ARRAYLENGTH(s_table); ++i) { tmp.b[i] = (s_table[i][src->b[i*2+0]] & 0xf0) | (s_table[i][src->b[i*2+1]] & 0x0f); @@ -214,6 +220,7 @@ static void des_RoundFunction(struct des_bit64 *src) des_SBOX(&tmp); des_TP(&tmp); + nullpo_retv(src); src->b[0] ^= tmp.b[4]; src->b[1] ^= tmp.b[5]; src->b[2] ^= tmp.b[6]; |