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Add 3K3 basic support

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This commit is contained in:
Bjoern Kerler
2020-04-11 01:39:24 +02:00
parent 327d8a8bfe
commit fceae52e68
2 changed files with 78 additions and 24 deletions
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100
armsrc/des.c
View File

@@ -388,30 +388,6 @@ void tdes_dec(void *out, void *in, const uint8_t *key) {
des_dec(out, out, (uint8_t *)key + 0); des_dec(out, out, (uint8_t *)key + 0);
} }
void tdes_2key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) {
if (length % 8) return;
uint8_t i;
uint8_t *tin = (uint8_t *) in;
uint8_t *tout = (uint8_t *) out;
while (length > 0) {
for (i = 0; i < 8; i++)
tout[i] = (unsigned char)(tin[i] ^ iv[i]);
des_enc(tout, tin, (uint8_t *)key + 0);
des_dec(tout, tout, (uint8_t *)key + 8);
des_enc(tout, tout, (uint8_t *)key + 0);
memcpy(iv, tout, 8);
tin += 8;
tout += 8;
length -= 8;
}
}
void tdes_2key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) { void tdes_2key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) {
if (length % 8) return; if (length % 8) return;
@@ -439,6 +415,82 @@ void tdes_2key_dec(void *out, const void *in, size_t length, const void *key, un
} }
} }
void tdes_2key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) {
if (length % 8) return;
uint8_t i;
uint8_t *tin = (uint8_t *) in;
uint8_t *tout = (uint8_t *) out;
while (length > 0) {
for (i = 0; i < 8; i++)
tout[i] = (unsigned char)(tin[i] ^ iv[i]);
des_enc(tout, tin, (uint8_t *)key + 0);
des_dec(tout, tout, (uint8_t *)key + 8);
des_enc(tout, tout, (uint8_t *)key + 0);
memcpy(iv, tout, 8);
tin += 8;
tout += 8;
length -= 8;
}
}
void tdes_3key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) {
if (length % 8) return;
uint8_t i;
uint8_t *tin = (uint8_t *) in;
uint8_t *tout = (uint8_t *) out;
while (length > 0) {
for (i = 0; i < 8; i++)
tout[i] = (unsigned char)(tin[i] ^ iv[i]);
des_enc(tout, tin, (uint8_t *)key + 0);
des_dec(tout, tout, (uint8_t *)key + 8);
des_enc(tout, tout, (uint8_t *)key + 16);
memcpy(iv, tout, 8);
tin += 8;
tout += 8;
length -= 8;
}
}
void tdes_3key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]) {
if (length % 8) return;
uint8_t i;
unsigned char temp[8];
uint8_t *tin = (uint8_t *) in;
uint8_t *tout = (uint8_t *) out;
while (length > 0) {
memcpy(temp, tin, 8);
des_dec(tout, tin, (uint8_t *)key + 0);
des_enc(tout, tout, (uint8_t *)key + 8);
des_dec(tout, tout, (uint8_t *)key + 16);
for (i = 0; i < 8; i++)
tout[i] = (unsigned char)(tout[i] ^ iv[i]);
memcpy(iv, temp, 8);
tin += 8;
tout += 8;
length -= 8;
}
}
/******************************************************************************/ /******************************************************************************/

2
armsrc/des.h
View File

@@ -104,6 +104,8 @@ void tdes_dec(void *out, void *in, const uint8_t *key);
void tdes_2key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]); void tdes_2key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]);
void tdes_2key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]); void tdes_2key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]);
void tdes_3key_enc(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]);
void tdes_3key_dec(void *out, const void *in, size_t length, const void *key, unsigned char iv[8]);
// Copied from des.h in desfire imp. // Copied from des.h in desfire imp.
typedef unsigned long DES_KS[16][2]; /* Single-key DES key schedule */ typedef unsigned long DES_KS[16][2]; /* Single-key DES key schedule */