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move some functions from cipurse to libcrypto

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This commit is contained in:
merlokk 2021-07-06 12:05:38 +03:00
commit 56d7efdbb5
5 changed files with 31 additions and 27 deletions
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23
client/src/cipurse/cipursecrypto.c
View file

@ -40,11 +40,6 @@ uint8_t CipurseCSecurityLevelEnc(CipurseChannelSecurityLevel lvl) {
}
}
static void bin_xor(uint8_t *d1, uint8_t *d2, size_t len) {
for (size_t i = 0; i < len; i++)
d1[i] = d1[i] ^ d2[i];
}
static void bin_ext(uint8_t *dst, size_t dstlen, uint8_t *src, size_t srclen) {
if (srclen > dstlen)
memcpy(dst, &src[srclen - dstlen], dstlen);
@ -218,24 +213,6 @@ bool CipurseCCheckCT(CipurseContext *ctx, uint8_t *CT) {
return (memcmp(CT, ctx->CT, CIPURSE_AES_KEY_LENGTH) == 0);
}
void AddISO9797M2Padding(uint8_t *ddata, size_t *ddatalen, uint8_t *sdata, size_t sdatalen, size_t blocklen) {
*ddatalen = sdatalen + 1;
*ddatalen += blocklen - *ddatalen % blocklen;
memset(ddata, 0, *ddatalen);
memcpy(ddata, sdata, sdatalen);
ddata[sdatalen] = ISO9797_M2_PAD_BYTE;
}
size_t FindISO9797M2PaddingDataLen(uint8_t *data, size_t datalen) {
for (int i = datalen; i > 0; i--) {
if (data[i - 1] == 0x80)
return i - 1;
if (data[i - 1] != 0x00)
return 0;
}
return 0;
}
static uint16_t CipurseCComputeMICCRC(uint8_t *data, size_t len) {
uint16_t initCRC = 0x6363;
for (size_t i = 0; i < len; i++) {

4
client/src/cipurse/cipursecrypto.h
View file

@ -21,7 +21,6 @@
#define CIPURSE_MAC_LENGTH 8
#define CIPURSE_MIC_LENGTH 4
#define CIPURSE_POLY 0x35b088cce172UL
#define ISO9797_M2_PAD_BYTE 0x80
#define member_size(type, member) sizeof(((type *)0)->member)
@ -66,9 +65,6 @@ bool CipurseCCheckCT(CipurseContext *ctx, uint8_t *CT);
void CipurseCChannelSetSecurityLevels(CipurseContext *ctx, CipurseChannelSecurityLevel req, CipurseChannelSecurityLevel resp);
bool isCipurseCChannelSecuritySet(CipurseContext *ctx);
void AddISO9797M2Padding(uint8_t *ddata, size_t *ddatalen, uint8_t *sdata, size_t sdatalen, size_t blocklen);
size_t FindISO9797M2PaddingDataLen(uint8_t *data, size_t datalen);
void CipurseCGenerateMAC(CipurseContext *ctx, uint8_t *data, size_t datalen, uint8_t *mac);
void CipurseCCalcMACPadded(CipurseContext *ctx, uint8_t *data, size_t datalen, uint8_t *mac);
bool CipurseCCheckMACPadded(CipurseContext *ctx, uint8_t *data, size_t datalen, uint8_t *mac);

1
client/src/cipurse/cipursetest.c
View file

@ -14,6 +14,7 @@
#include <string.h> // memcpy memset
#include "fileutils.h"
#include "crypto/libpcrypto.h"
#include "cipurse/cipursecrypto.h"
#include "cipurse/cipursecore.h"

23
client/src/crypto/libpcrypto.c
View file

@ -536,3 +536,26 @@ exit:
PrintAndLogEx(NORMAL, _RED_("failed\n"));
return res;
}
void bin_xor(uint8_t *d1, uint8_t *d2, size_t len) {
for (size_t i = 0; i < len; i++)
d1[i] = d1[i] ^ d2[i];
}
void AddISO9797M2Padding(uint8_t *ddata, size_t *ddatalen, uint8_t *sdata, size_t sdatalen, size_t blocklen) {
*ddatalen = sdatalen + 1;
*ddatalen += blocklen - *ddatalen % blocklen;
memset(ddata, 0, *ddatalen);
memcpy(ddata, sdata, sdatalen);
ddata[sdatalen] = ISO9797_M2_PAD_BYTE;
}
size_t FindISO9797M2PaddingDataLen(uint8_t *data, size_t datalen) {
for (int i = datalen; i > 0; i--) {
if (data[i - 1] == 0x80)
return i - 1;
if (data[i - 1] != 0x00)
return 0;
}
return 0;
}

7
client/src/crypto/libpcrypto.h
View file

@ -42,4 +42,11 @@ char *ecdsa_get_error(int ret);
int ecdsa_nist_test(bool verbose);
void bin_xor(uint8_t *d1, uint8_t *d2, size_t len);
#define ISO9797_M2_PAD_BYTE 0x80
void AddISO9797M2Padding(uint8_t *ddata, size_t *ddatalen, uint8_t *sdata, size_t sdatalen, size_t blocklen);
size_t FindISO9797M2PaddingDataLen(uint8_t *data, size_t datalen);
#endif /* libpcrypto.h */