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desfire_crypto: remove global vars

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This commit is contained in:
Philippe Teuwen 2020-06-01 15:28:18 +02:00
commit ff1f945291
1 changed files with 18 additions and 8 deletions
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26
client/src/mifare/desfire_crypto.c
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@ -36,10 +36,6 @@
#include "crc16.h" // crc16 ccitt #include "crc16.h" // crc16 ccitt
#include "crc32.h" #include "crc32.h"
mbedtls_des_context ctx;
mbedtls_des3_context ctx3;
mbedtls_aes_context actx;
#ifndef AddCrc14A #ifndef AddCrc14A
# define AddCrc14A(data, len) compute_crc(CRC_14443_A, (data), (len), (data)+(len), (data)+(len)+1) # define AddCrc14A(data, len) compute_crc(CRC_14443_A, (data), (len), (data)+(len), (data)+(len)+1)
#endif #endif
@ -57,17 +53,20 @@ static inline void update_key_schedules(desfirekey_t key) {
/******************************************************************************/ /******************************************************************************/
void des_encrypt(void *out, const void *in, const void *key) { void des_encrypt(void *out, const void *in, const void *key) {
mbedtls_des_context ctx;
mbedtls_des_setkey_enc(&ctx, key); mbedtls_des_setkey_enc(&ctx, key);
mbedtls_des_crypt_ecb(&ctx, in, out); mbedtls_des_crypt_ecb(&ctx, in, out);
} }
void des_decrypt(void *out, const void *in, const void *key) { void des_decrypt(void *out, const void *in, const void *key) {
mbedtls_des_context ctx;
mbedtls_des_setkey_dec(&ctx, key); mbedtls_des_setkey_dec(&ctx, key);
mbedtls_des_crypt_ecb(&ctx, in, out); mbedtls_des_crypt_ecb(&ctx, in, out);
} }
void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) { void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) {
if (length % 8) return; if (length % 8) return;
mbedtls_des3_context ctx3;
if (keymode == 2) mbedtls_des3_set2key_dec(&ctx3, key); if (keymode == 2) mbedtls_des3_set2key_dec(&ctx3, key);
else mbedtls_des3_set3key_dec(&ctx3, key); else mbedtls_des3_set3key_dec(&ctx3, key);
@ -94,6 +93,7 @@ void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key,
void tdes_nxp_send(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) { void tdes_nxp_send(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) {
if (length % 8) return; if (length % 8) return;
mbedtls_des3_context ctx3;
if (keymode == 2) mbedtls_des3_set2key_enc(&ctx3, key); if (keymode == 2) mbedtls_des3_set2key_enc(&ctx3, key);
else mbedtls_des3_set3key_enc(&ctx3, key); else mbedtls_des3_set3key_enc(&ctx3, key);
@ -754,14 +754,17 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
break; break;
case T_3DES: case T_3DES:
switch (operation) { switch (operation) {
case MCO_ENCYPHER: case MCO_ENCYPHER: {
mbedtls_des3_context ctx3;
mbedtls_des3_set2key_enc(&ctx3, key->data); mbedtls_des3_set2key_enc(&ctx3, key->data);
mbedtls_des3_crypt_ecb(&ctx3, data, edata); mbedtls_des3_crypt_ecb(&ctx3, data, edata);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
break; break;
case MCO_DECYPHER: }
case MCO_DECYPHER: {
mbedtls_des3_context ctx3;
mbedtls_des3_set2key_dec(&ctx3, key->data); mbedtls_des3_set2key_dec(&ctx3, key->data);
mbedtls_des3_crypt_ecb(&ctx3, data, edata); mbedtls_des3_crypt_ecb(&ctx3, data, edata);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
@ -769,17 +772,21 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
break; break;
} }
}
break; break;
case T_3K3DES: case T_3K3DES:
switch (operation) { switch (operation) {
case MCO_ENCYPHER: case MCO_ENCYPHER: {
mbedtls_des3_context ctx3;
mbedtls_des3_set3key_enc(&ctx3, key->data); mbedtls_des3_set3key_enc(&ctx3, key->data);
mbedtls_des3_crypt_ecb(&ctx3, data, edata); mbedtls_des3_crypt_ecb(&ctx3, data, edata);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_ENCRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_ENCRYPT);
break; break;
case MCO_DECYPHER: }
case MCO_DECYPHER: {
mbedtls_des3_context ctx3;
mbedtls_des3_set3key_dec(&ctx3, key->data); mbedtls_des3_set3key_dec(&ctx3, key->data);
mbedtls_des3_crypt_ecb(&ctx3, data, edata); mbedtls_des3_crypt_ecb(&ctx3, data, edata);
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_DECRYPT);
@ -787,10 +794,12 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT); // DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
break; break;
} }
}
break; break;
case T_AES: case T_AES:
switch (operation) { switch (operation) {
case MCO_ENCYPHER: { case MCO_ENCYPHER: {
mbedtls_aes_context actx;
mbedtls_aes_init(&actx); mbedtls_aes_init(&actx);
mbedtls_aes_setkey_enc(&actx, key->data, 128); mbedtls_aes_setkey_enc(&actx, key->data, 128);
mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_ENCRYPT, sizeof(edata), ivect, data, edata); mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_ENCRYPT, sizeof(edata), ivect, data, edata);
@ -798,6 +807,7 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
break; break;
} }
case MCO_DECYPHER: { case MCO_DECYPHER: {
mbedtls_aes_context actx;
mbedtls_aes_init(&actx); mbedtls_aes_init(&actx);
mbedtls_aes_setkey_dec(&actx, key->data, 128); mbedtls_aes_setkey_dec(&actx, key->data, 128);
mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_DECRYPT, sizeof(edata), ivect, edata, data); mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_DECRYPT, sizeof(edata), ivect, edata, data);