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RPCrypt IV

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This commit is contained in:
Florian Märkl 2018-11-17 14:02:57 +01:00
commit 9a71e88819
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GPG key ID: 125BC8A5A6A1E857
5 changed files with 102 additions and 11 deletions
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14
lib/include/chiaki/common.h
View file

@ -28,17 +28,17 @@ extern "C" {
typedef enum
{
CHIAKI_ERR_SUCCESS = 0,
CHIAKI_ERR_PARSE_ADDR = 1,
CHIAKI_ERR_THREAD = 2,
CHIAKI_ERR_MEMORY = 3,
CHIAKI_ERR_NETWORK = 4,
CHIAKI_ERR_INVALID_DATA = 5,
CHIAKI_ERR_BUF_TOO_SMALL = 6
CHIAKI_ERR_UNKNOWN,
CHIAKI_ERR_PARSE_ADDR,
CHIAKI_ERR_THREAD,
CHIAKI_ERR_MEMORY,
CHIAKI_ERR_NETWORK,
CHIAKI_ERR_INVALID_DATA,
CHIAKI_ERR_BUF_TOO_SMALL
} ChiakiErrorCode;
CHIAKI_EXPORT const char *chiaki_error_string(ChiakiErrorCode code);
#ifdef __cplusplus
}
#endif

7
lib/include/chiaki/rpcrypt.h
View file

@ -30,11 +30,16 @@ extern "C" {
typedef struct chiaki_rpcrypt_t
{
uint8_t bright[CHIAKI_KEY_BYTES];
uint8_t ambassador[CHIAKI_KEY_BYTES];
struct hmac_ctx_st *hmac_ctx;
} ChiakiRPCrypt;
CHIAKI_EXPORT void chiaki_rpcrypt_bright_ambassador(uint8_t *bright, uint8_t *ambassador, const uint8_t *nonce, const uint8_t *morning);
CHIAKI_EXPORT void chiaki_rpcrypt_init(ChiakiRPCrypt *rpcrypt, const uint8_t *nonce, const uint8_t *morning);
CHIAKI_EXPORT ChiakiErrorCode chiaki_rpcrypt_generate_iv(ChiakiRPCrypt *rpcrypt, uint8_t *iv, uint64_t counter);
#ifdef __cplusplus
}
#endif

3
lib/src/common.c
View file

@ -17,6 +17,7 @@
#include <chiaki/common.h>
CHIAKI_EXPORT const char *chiaki_error_string(ChiakiErrorCode code)
{
switch(code)
@ -36,4 +37,4 @@ CHIAKI_EXPORT const char *chiaki_error_string(ChiakiErrorCode code)
default:
return "Unknown";
}
}
}

37
lib/src/rpcrypt.c
View file

@ -17,6 +17,10 @@
#include <chiaki/rpcrypt.h>
#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <string.h>
CHIAKI_EXPORT void chiaki_rpcrypt_bright_ambassador(uint8_t *bright, uint8_t *ambassador, const uint8_t *nonce, const uint8_t *morning)
@ -42,4 +46,37 @@ CHIAKI_EXPORT void chiaki_rpcrypt_bright_ambassador(uint8_t *bright, uint8_t *am
v ^= nonce[i];
bright[i] = v;
}
}
CHIAKI_EXPORT void chiaki_rpcrypt_init(ChiakiRPCrypt *rpcrypt, const uint8_t *nonce, const uint8_t *morning)
{
chiaki_rpcrypt_bright_ambassador(rpcrypt->bright, rpcrypt->ambassador, nonce, morning);
}
CHIAKI_EXPORT ChiakiErrorCode chiaki_rpcrypt_generate_iv(ChiakiRPCrypt *rpcrypt, uint8_t *iv, uint64_t counter)
{
uint8_t hmac_key[] = { 0xac, 0x07, 0x88, 0x83, 0xc8, 0x3a, 0x1f, 0xe8, 0x11, 0x46, 0x3a, 0xf3, 0x9e, 0xe3, 0xe3, 0x77 };
uint8_t buf[CHIAKI_KEY_BYTES + 8];
memcpy(buf, rpcrypt->ambassador, CHIAKI_KEY_BYTES);
buf[CHIAKI_KEY_BYTES + 0] = (uint8_t)((counter >> 0x38) & 0xff);
buf[CHIAKI_KEY_BYTES + 1] = (uint8_t)((counter >> 0x30) & 0xff);
buf[CHIAKI_KEY_BYTES + 2] = (uint8_t)((counter >> 0x28) & 0xff);
buf[CHIAKI_KEY_BYTES + 3] = (uint8_t)((counter >> 0x20) & 0xff);
buf[CHIAKI_KEY_BYTES + 4] = (uint8_t)((counter >> 0x18) & 0xff);
buf[CHIAKI_KEY_BYTES + 5] = (uint8_t)((counter >> 0x10) & 0xff);
buf[CHIAKI_KEY_BYTES + 6] = (uint8_t)((counter >> 0x08) & 0xff);
buf[CHIAKI_KEY_BYTES + 7] = (uint8_t)((counter >> 0x00) & 0xff);
uint8_t hmac[32];
unsigned int hmac_len = 0;
if(!HMAC(EVP_sha256(), hmac_key, CHIAKI_KEY_BYTES, buf, sizeof(buf), hmac, &hmac_len))
return CHIAKI_ERR_UNKNOWN;
if(hmac_len < CHIAKI_KEY_BYTES)
return CHIAKI_ERR_UNKNOWN;
memcpy(iv, hmac, CHIAKI_KEY_BYTES);
return CHIAKI_ERR_SUCCESS;
}

52
test/rpcrypt.c
View file

@ -19,10 +19,13 @@
#include <chiaki/rpcrypt.h>
static const uint8_t nonce[] = { 0x43, 0x9, 0x67, 0xae, 0x36, 0x4b, 0x1c, 0x45, 0x26, 0x62, 0x37, 0x7a, 0xbf, 0x3f, 0xe9, 0x39 };
static const uint8_t morning[] = { 0xd2, 0x78, 0x9f, 0x51, 0x85, 0xa7, 0x99, 0xa2, 0x44, 0x52, 0x77, 0x9c, 0x2b, 0x83, 0xcf, 0x7 };
static MunitResult test_bright_ambassador(const MunitParameter params[], void *user)
{
static const uint8_t nonce[] = { 0x43, 0x9, 0x67, 0xae, 0x36, 0x4b, 0x1c, 0x45, 0x26, 0x62, 0x37, 0x7a, 0xbf, 0x3f, 0xe9, 0x39 };
static const uint8_t morning[] = { 0xd2, 0x78, 0x9f, 0x51, 0x85, 0xa7, 0x99, 0xa2, 0x44, 0x52, 0x77, 0x9c, 0x2b, 0x83, 0xcf, 0x7 };
static const uint8_t bright_expected[] = { 0xa4, 0x4e, 0x2a, 0x16, 0x5e, 0x20, 0xd3, 0xf, 0xaa, 0x11, 0x8b, 0xc7, 0x7c, 0xa7, 0xdc, 0x11 };
static const uint8_t ambassador_expected[] = { 0x1d, 0xa8, 0xb9, 0x1f, 0x6e, 0x26, 0x64, 0x2e, 0xbc, 0x8, 0x8b, 0x0, 0x4f, 0x1, 0x5b, 0x52 };
@ -36,6 +39,43 @@ static MunitResult test_bright_ambassador(const MunitParameter params[], void *u
return MUNIT_OK;
}
static MunitResult test_iv(const MunitParameter params[], void *user)
{
static const uint8_t iv_a_expected[] = { 0x6, 0x29, 0xbe, 0x4, 0xe9, 0x91, 0x1c, 0x48, 0xb4, 0x5c, 0x2, 0x6d, 0xb7, 0xb7, 0x88, 0x46 };
static const uint8_t iv_b_expected[] = { 0x3f, 0xd0, 0x83, 0xa, 0xc7, 0x30, 0xfc, 0x56, 0x75, 0x2d, 0xbe, 0xb8, 0x2c, 0x68, 0xa7, 0x4 };
ChiakiRPCrypt rpcrypt;
ChiakiErrorCode err;
chiaki_rpcrypt_init(&rpcrypt, nonce, morning);
uint8_t iv[CHIAKI_KEY_BYTES];
err = chiaki_rpcrypt_generate_iv(&rpcrypt, iv, 0);
if(err != CHIAKI_ERR_SUCCESS)
return MUNIT_ERROR;
munit_assert_memory_equal(CHIAKI_KEY_BYTES, iv, iv_a_expected);
err = chiaki_rpcrypt_generate_iv(&rpcrypt, iv, 0);
if(err != CHIAKI_ERR_SUCCESS)
return MUNIT_ERROR;
munit_assert_memory_equal(CHIAKI_KEY_BYTES, iv, iv_a_expected);
err = chiaki_rpcrypt_generate_iv(&rpcrypt, iv, 0x0102030405060708);
if(err != CHIAKI_ERR_SUCCESS)
return MUNIT_ERROR;
munit_assert_memory_equal(CHIAKI_KEY_BYTES, iv, iv_b_expected);
err = chiaki_rpcrypt_generate_iv(&rpcrypt, iv, 0x0102030405060708);
if(err != CHIAKI_ERR_SUCCESS)
return MUNIT_ERROR;
munit_assert_memory_equal(CHIAKI_KEY_BYTES, iv, iv_b_expected);
return MUNIT_OK;
}
MunitTest tests_rpcrypt[] = {
{
"/bright_ambassador",
@ -45,5 +85,13 @@ MunitTest tests_rpcrypt[] = {
MUNIT_TEST_OPTION_NONE,
NULL
},
{
"/iv",
test_iv,
NULL,
NULL,
MUNIT_TEST_OPTION_NONE,
NULL
},
{ NULL, NULL, NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL }
};