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add crypto sketch

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This commit is contained in:
merlokk 2021-05-29 15:21:53 +03:00
commit 90f930659c
4 changed files with 74 additions and 14 deletions
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1
client/Makefile
View file

@ -558,6 +558,7 @@ SRCS = aiddesfire.c \
fido/cbortools.c \
fido/fidocore.c \
cipurse/cipursecore.c \
cipurse/cipursecrypto.c \
fileutils.c \
flash.c \
generator.c \

44
client/src/cipurse/cipursecrypto.c
View file

@ -8,7 +8,7 @@
// CIPURSE crypto primitives
//-----------------------------------------------------------------------------
#include "cipursecore.h"
#include "cipursecrypto.h"
#include "commonutil.h" // ARRAYLEN
#include "comms.h" // DropField
@ -20,4 +20,46 @@
#include "ui.h"
#include "util.h"
void CipurseClearContext(CipurseContext *ctx) {
if (ctx == NULL)
return;
memset(ctx, 0, sizeof(CipurseContext));
}
void CipurseSetKey(CipurseContext *ctx, uint8_t keyId, uint8_t *key) {
if (ctx == NULL)
return;
CipurseClearContext(ctx);
ctx->keyId = keyId;
memcpy(ctx->key, key, member_size(CipurseContext, key));
}
void CipurseSetRandomFromPICC(CipurseContext *ctx, uint8_t *random) {
if (ctx == NULL)
return;
memcpy(ctx->RP, random, member_size(CipurseContext, RP));
memcpy(ctx->rP, random + member_size(CipurseContext, RP), member_size(CipurseContext, rP));
}
void CipurseSetRandomHost(CipurseContext *ctx) {
memset(ctx->RT, 0x10, member_size(CipurseContext, RT));
memset(ctx->rT, 0x20, member_size(CipurseContext, rT));
}
void CipurseAuthenticateHost(CipurseContext *ctx) {
if (ctx == NULL)
return;
/* RT = Random.nextBytes(16)
rT = Random.nextBytes(6)
val cP = generateK0AndGetCp(key, RP, rP, RT, rT) ?: return Pair(null, null)
return Pair(cP + RT + rT, generateCT(RT))*/
}

35
client/src/cipurse/cipursecrypto.h
View file

@ -13,28 +13,37 @@
#include "common.h"
#define member_size(type, member) sizeof(((type *)0)->member)
enum CipurseChannelSecurityLevel {
CPSNone,
CPSPlain,
CPSMACed,
CPSEncrypted
}
};
struct CipurseSession {
uint8_t keyId,
uint8_t[16] key,
typedef struct CipurseContextS {
uint8_t keyId;
uint8_t key[16];
uint8_t[16] RP,
uint8_t[6] rP,
uint8_t[16] RT,
uint8_t[6] rT,
uint8_t RP[16];
uint8_t rP[6];
uint8_t RT[16];
uint8_t rT[6];
uint8_t[16] k0,
uint8_t[16] cP,
uint8_t frameKey0[16];
uint8_t cP[16];
uint8_t[16] frameKey,
uint8_t[16] frameKey1
}
uint8_t frameKey[16];
uint8_t frameKeyNext[16];
} CipurseContext;
void CipurseClearContext(CipurseContext *ctx);
void CipurseSetKey(CipurseContext *ctx, uint8_t keyId, uint8_t *key);
void CipurseSetRandomFromPICC(CipurseContext *ctx, uint8_t *random);
void CipurseSetRandomHost(CipurseContext *ctx);
void CipurseAuthenticateHost(CipurseContext *ctx);

8
client/src/cmdhfcipurse.c
View file

@ -24,6 +24,7 @@
#include "cliparser.h"
#include "cmdhfcipurse.h"
#include "cipurse/cipursecore.h"
#include "cipurse/cipursecrypto.h"
#include "ui.h"
#include "cmdhf14a.h"
#include "cmdtrace.h"
@ -94,12 +95,19 @@ static int CmdHFCipurseAuth(const char *Cmd) {
return PM3_ESOFT;
}
uint8_t key[] = {0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73, 0x73};
CipurseContext ctx = {0};
CipurseSetKey(&ctx, 1, key);
res = CIPURSEChallenge(buf, sizeof(buf), &len, &sw);
if (res != 0 || len != 0x16) {
PrintAndLogEx(ERR, "Cipurse get challenge error. Card returns 0x%04x.", sw);
DropField();
return PM3_ESOFT;
}
CipurseSetRandomFromPICC(&ctx, buf);
DropField();