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ID:441 - Add support for HMAC_MD5 and HMAC_SHA256

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Commit adds support for cipher suites 6/7/8 (HMAC-MD5) and cipher
suites 15/16/17 (HMAC_SHA256).
This also fixes:
* ID:442 - IPMI_AUTH_RAKP_HMAC_MD5 support in lanplus
* ID:141 - RMCP+ Cipher-suite 17 not supported

Original author Liebig Holger(Fujitsu).
Code cleanup done by Florian Breu and Zdenek Styblik.
This commit is contained in:
Zdenek Styblik 2016-05-28 13:25:36 +02:00
parent b74c20c5d5
commit 8ca47f21ca
10 changed files with 347 additions and 74 deletions
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10
configure.ac
View File

@ -164,6 +164,16 @@ AC_CHECK_LIB([crypto], [EVP_aes_128_cbc],
fi],
[have_crypto=no], [-lcrypto])
AC_CHECK_LIB([crypto], [EVP_sha256],
[if test "x$xenable_internal_sha256" != "xyes"; then
if test "x$have_crypto" != "xyes"; then
LIBS="$LIBS -lcrypto"
have_sha256=yes
fi
AC_DEFINE(HAVE_CRYPTO_SHA256, [1], [Define to 1 if libcrypto supports SHA256.])
fi],
[], [-lcrypto])
AC_CHECK_LIB([crypto], [MD5_Init],
[if test "x$xenable_internal_md5" != "xyes"; then
if test "x$have_crypto" != "xyes"; then

5
include/ipmitool/ipmi.h
View File

@ -46,6 +46,7 @@
#endif
#define IPMI_BUF_SIZE 1024
#define IPMI_MAX_MD_SIZE 0x20
#if HAVE_PRAGMA_PACK
#define ATTRIBUTE_PACKING
@ -211,13 +212,13 @@ struct ipmi_rs {
uint32_t console_id;
uint8_t bmc_rand[16]; /* Random number generated by the BMC */
uint8_t bmc_guid[16];
uint8_t key_exchange_auth_code[20];
uint8_t key_exchange_auth_code[IPMI_MAX_MD_SIZE];
} rakp2_message;
struct {
uint8_t message_tag;
uint8_t rakp_return_code;
uint32_t console_id;
uint8_t integrity_check_value[20];
uint8_t integrity_check_value[IPMI_MAX_MD_SIZE];
} rakp4_message;
struct {
uint8_t packet_sequence_number;

2
include/ipmitool/ipmi_constants.h
View File

@ -118,12 +118,14 @@
#define IPMI_AUTH_RAKP_NONE 0x00
#define IPMI_AUTH_RAKP_HMAC_SHA1 0x01
#define IPMI_AUTH_RAKP_HMAC_MD5 0x02
#define IPMI_AUTH_RAKP_HMAC_SHA256 0x03
/* From table 13-18 of the IPMI v2 specification */
#define IPMI_INTEGRITY_NONE 0x00
#define IPMI_INTEGRITY_HMAC_SHA1_96 0x01
#define IPMI_INTEGRITY_HMAC_MD5_128 0x02
#define IPMI_INTEGRITY_MD5_128 0x03
#define IPMI_INTEGRITY_HMAC_SHA256_128 0x04
/* From table 13-19 of the IPMI v2 specfication */
#define IPMI_CRYPT_NONE 0x00

13
include/ipmitool/ipmi_intf.h
View File

@ -59,7 +59,7 @@ enum LANPLUS_SESSION_STATE {
#define IPMI_AUTHCODE_BUFFER_SIZE 20
#define IPMI_SIK_BUFFER_SIZE 20
#define IPMI_SIK_BUFFER_SIZE IPMI_MAX_MD_SIZE
#define IPMI_KG_BUFFER_SIZE 21 /* key plus null byte */
struct ipmi_session_params {
@ -131,10 +131,13 @@ struct ipmi_session {
uint8_t requested_role; /* As sent in the RAKP 1 message */
uint8_t rakp2_return_code;
uint8_t sik[IPMI_SIK_BUFFER_SIZE]; /* Session integrity key */
uint8_t kg[IPMI_KG_BUFFER_SIZE]; /* BMC key */
uint8_t k1[20]; /* Used for Integrity checking? */
uint8_t k2[20]; /* First 16 bytes used for AES */
uint8_t sik[IPMI_SIK_BUFFER_SIZE]; /* Session integrity key */
uint8_t sik_len; /* Session Integrity key length */
uint8_t kg[IPMI_KG_BUFFER_SIZE]; /* BMC key */
uint8_t k1[IPMI_MAX_MD_SIZE]; /* Used for Integrity checking? */
uint8_t k1_len; /* K1 key length */
uint8_t k2[IPMI_MAX_MD_SIZE]; /* First 16 bytes used for AES */
uint8_t k2_len; /* K2 key length */
} v2_data;

6
lib/ipmi_strings.c
View File

@ -621,6 +621,9 @@ const struct valstr ipmi_auth_algorithms[] = {
{ IPMI_AUTH_RAKP_NONE, "none" },
{ IPMI_AUTH_RAKP_HMAC_SHA1, "hmac_sha1" },
{ IPMI_AUTH_RAKP_HMAC_MD5, "hmac_md5" },
#ifdef HAVE_CRYPTO_SHA256
{ IPMI_AUTH_RAKP_HMAC_SHA256, "hmac_sha256" },
#endif /* HAVE_CRYPTO_SHA256 */
{ 0x00, NULL }
};
@ -629,6 +632,9 @@ const struct valstr ipmi_integrity_algorithms[] = {
{ IPMI_INTEGRITY_HMAC_SHA1_96, "hmac_sha1_96" },
{ IPMI_INTEGRITY_HMAC_MD5_128, "hmac_md5_128" },
{ IPMI_INTEGRITY_MD5_128 , "md5_128" },
#ifdef HAVE_CRYPTO_SHA256
{ IPMI_INTEGRITY_HMAC_SHA256_128, "sha256_128" },
#endif /* HAVE_CRYPTO_SHA256 */
{ 0x00, NULL }
};

121
src/plugins/lanplus/lanplus.c
View File

@ -169,9 +169,14 @@ int lanplus_get_requested_ciphers(int cipher_suite_id,
uint8_t * integrity_alg,
uint8_t * crypt_alg)
{
#ifdef HAVE_CRYPTO_SHA256
if ((cipher_suite_id < 0) || (cipher_suite_id > 17)) {
return 1;
}
#else
if ((cipher_suite_id < 0) || (cipher_suite_id > 14))
return 1;
#endif /* HAVE_CRYPTO_SHA256 */
/* See table 22-19 for the source of the statement */
switch (cipher_suite_id)
{
@ -250,6 +255,23 @@ int lanplus_get_requested_ciphers(int cipher_suite_id,
*integrity_alg = IPMI_INTEGRITY_MD5_128;
*crypt_alg = IPMI_CRYPT_XRC4_40;
break;
#ifdef HAVE_CRYPTO_SHA256
case 15:
*auth_alg = IPMI_AUTH_RAKP_HMAC_SHA256;
*integrity_alg = IPMI_INTEGRITY_NONE;
*crypt_alg = IPMI_CRYPT_NONE;
break;
case 16:
*auth_alg = IPMI_AUTH_RAKP_HMAC_SHA256;
*integrity_alg = IPMI_INTEGRITY_HMAC_SHA256_128;
*crypt_alg = IPMI_CRYPT_NONE;
break;
case 17:
*auth_alg = IPMI_AUTH_RAKP_HMAC_SHA256;
*integrity_alg = IPMI_INTEGRITY_HMAC_SHA256_128;
*crypt_alg = IPMI_CRYPT_AES_CBC_128;
break;
#endif /* HAVE_CRYPTO_SHA256 */
}
return 0;
@ -1022,15 +1044,34 @@ read_rakp2_message(
break;
case IPMI_AUTH_RAKP_HMAC_SHA1:
/* We need to copy 20 bytes */
for (i = 0; i < 20; ++i)
rsp->payload.rakp2_message.key_exchange_auth_code[i] =
rsp->data[offset + 40 + i];
break;
/* We need to copy 20 bytes */
for (i = 0; i < IPMI_SHA_DIGEST_LENGTH; ++i) {
rsp->payload.rakp2_message.key_exchange_auth_code[i] =
rsp->data[offset + 40 + i];
}
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
lprintf(LOG_ERR, "read_rakp2_message: no support for "
"IPMI_AUTH_RAKP_HMAC_MD5");
/* We need to copy 16 bytes */
for (i = 0; i < IPMI_MD5_DIGEST_LENGTH; ++i) {
rsp->payload.rakp2_message.key_exchange_auth_code[i] =
rsp->data[offset + 40 + i];
}
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
/* We need to copy 32 bytes */
for (i = 0; i < IPMI_SHA256_DIGEST_LENGTH; ++i) {
rsp->payload.rakp2_message.key_exchange_auth_code[i] =
rsp->data[offset + 40 + i];
}
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
lprintf(LOG_ERR, "read_rakp2_message: no support "
"for authentication algorithm 0x%x", auth_alg);
assert(0);
break;
}
@ -1088,13 +1129,32 @@ read_rakp4_message(
break;
case IPMI_AUTH_RAKP_HMAC_SHA1:
/* We need to copy 12 bytes */
for (i = 0; i < 12; ++i)
rsp->payload.rakp4_message.integrity_check_value[i] =
rsp->data[offset + 8 + i];
break;
/* We need to copy 12 bytes */
for (i = 0; i < IPMI_SHA1_AUTHCODE_SIZE; ++i) {
rsp->payload.rakp4_message.integrity_check_value[i] =
rsp->data[offset + 8 + i];
}
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
/* We need to copy 16 bytes */
for (i = 0; i < IPMI_HMAC_MD5_AUTHCODE_SIZE; ++i) {
rsp->payload.rakp4_message.integrity_check_value[i] =
rsp->data[offset + 8 + i];
}
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
/* We need to copy 16 bytes */
for (i = 0; i < IPMI_HMAC_SHA256_AUTHCODE_SIZE; ++i) {
rsp->payload.rakp4_message.integrity_check_value[i] =
rsp->data[offset + 8 + i];
}
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
lprintf(LOG_ERR, "read_rakp4_message: no support "
"for authentication algorithm 0x%x", auth_alg);
assert(0);
@ -1760,7 +1820,11 @@ ipmi_lanplus_build_v2x_msg(
if ((session->v2_data.session_state == LANPLUS_STATE_ACTIVE) &&
(session->v2_data.integrity_alg != IPMI_INTEGRITY_NONE))
{
uint32_t i, hmac_length, integrity_pad_size = 0, hmac_input_size;
uint32_t i;
uint32_t hmac_length;
uint32_t auth_length = 0;
uint32_t integrity_pad_size = 0;
uint32_t hmac_input_size;
uint8_t * hmac_output;
uint32_t start_of_session_trailer =
IPMI_LANPLUS_OFFSET_PAYLOAD +
@ -1818,22 +1882,43 @@ ipmi_lanplus_build_v2x_msg(
/* Auth Code */
lanplus_HMAC(session->v2_data.integrity_alg,
session->v2_data.k1, /* key */
20, /* key length */
session->v2_data.k1_len, /* key length */
msg + IPMI_LANPLUS_OFFSET_AUTHTYPE, /* hmac input */
hmac_input_size,
hmac_output,
&hmac_length);
assert(hmac_length == 20);
switch(session->v2_data.integrity_alg) {
case IPMI_INTEGRITY_HMAC_SHA1_96:
assert(hmac_length == IPMI_SHA_DIGEST_LENGTH);
auth_length = IPMI_SHA1_AUTHCODE_SIZE;
break;
case IPMI_INTEGRITY_HMAC_MD5_128 :
assert(hmac_length == IPMI_MD5_DIGEST_LENGTH);
auth_length = IPMI_HMAC_MD5_AUTHCODE_SIZE;
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_INTEGRITY_HMAC_SHA256_128:
assert(hmac_length == IPMI_SHA256_DIGEST_LENGTH);
auth_length = IPMI_HMAC_SHA256_AUTHCODE_SIZE;
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
assert(0);
break;
}
if (verbose > 2)
printbuf(hmac_output, 12, "authcode output");
printbuf(hmac_output, auth_length, "authcode output");
/* Set session_trailer_length appropriately */
session_trailer_length =
integrity_pad_size +
2 + /* pad length + next header */
12; /* Size of the authcode (we only use the first 12 bytes) */
auth_length; /* Size of the authcode. We only
* use the first 12(SHA1) or
* 16(MD5/SHA256) bytes.
*/
}

18
src/plugins/lanplus/lanplus.h
View File

@ -96,12 +96,20 @@
#define IPMI_MAX_CONF_HEADER_SIZE 0x20
#define IPMI_MAX_PAYLOAD_SIZE 0xFFFF /* Includes confidentiality header/trailer */
#define IPMI_MAX_CONF_TRAILER_SIZE 0x20
#define IPMI_MAX_INTEGRITY_PAD_SIZE 0x20
#define IPMI_MAX_AUTH_CODE_SIZE 0x20
#define IPMI_MAX_INTEGRITY_PAD_SIZE IPMI_MAX_MD_SIZE
#define IPMI_MAX_AUTH_CODE_SIZE IPMI_MAX_MD_SIZE
#define IPMI_REQUEST_MESSAGE_SIZE 0x07
#define IPMI_MAX_MAC_SIZE 0x14 /* The largest mac we ever expect to generate */
#define IPMI_SHA1_AUTHCODE_SIZE 0x0C
#define IPMI_MAX_MAC_SIZE IPMI_MAX_MD_SIZE /* The largest mac we ever expect to generate */
#define IPMI_SHA1_AUTHCODE_SIZE 12
#define IPMI_HMAC_MD5_AUTHCODE_SIZE 16
#define IPMI_MD5_AUTHCODE_SIZE 16
#define IPMI_HMAC_SHA256_AUTHCODE_SIZE 16
#define IPMI_SHA_DIGEST_LENGTH 20
#define IPMI_MD5_DIGEST_LENGTH 16
#define IPMI_SHA256_DIGEST_LENGTH 32
/*
*This is accurate, as long as we're only passing 1 auth algorithm,
@ -109,7 +117,7 @@
*/
#define IPMI_OPEN_SESSION_REQUEST_SIZE 32
#define IPMI_RAKP1_MESSAGE_SIZE 44
#define IPMI_RAKP3_MESSAGE_MAX_SIZE 28
#define IPMI_RAKP3_MESSAGE_MAX_SIZE (8 + IPMI_MAX_MD_SIZE)
#define IPMI_MAX_USER_NAME_LENGTH 16

196
src/plugins/lanplus/lanplus_crypt.c
View File

@ -74,7 +74,7 @@ lanplus_rakp2_hmac_matches(const struct ipmi_session * session,
{
uint8_t * buffer;
int bufferLength, i;
uint8_t mac[20];
uint8_t mac[IPMI_MAX_MD_SIZE];
uint32_t macLength;
uint32_t SIDm_lsbf, SIDc_lsbf;
@ -84,7 +84,12 @@ lanplus_rakp2_hmac_matches(const struct ipmi_session * session,
return 1;
/* We don't yet support other algorithms */
assert(session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1);
assert((session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1)
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_MD5)
#ifdef HAVE_CRYPTO_SHA256
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA256)
#endif /* HAVE_CRYPTO_SHA256 */
);
bufferLength =
@ -228,8 +233,9 @@ lanplus_rakp4_hmac_matches(const struct ipmi_session * session,
{
uint8_t * buffer;
int bufferLength, i;
uint8_t mac[20];
uint8_t mac[IPMI_MAX_MD_SIZE];
uint32_t macLength;
uint32_t cmpLength;
uint32_t SIDc_lsbf;
if (ipmi_oem_active(intf, "intelplus")){
@ -238,13 +244,19 @@ lanplus_rakp4_hmac_matches(const struct ipmi_session * session,
return 1;
/* We don't yet support other algorithms */
assert(session->v2_data.integrity_alg == IPMI_INTEGRITY_HMAC_SHA1_96);
assert((session->v2_data.integrity_alg == IPMI_INTEGRITY_HMAC_SHA1_96)
|| (session->v2_data.integrity_alg == IPMI_INTEGRITY_HMAC_MD5_128));
} else {
if (session->v2_data.auth_alg == IPMI_AUTH_RAKP_NONE)
return 1;
/* We don't yet support other algorithms */
assert(session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1);
assert((session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1)
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_MD5)
#ifdef HAVE_CRYPTO_SHA256
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA256)
#endif /* HAVE_CRYPTO_SHA256 */
);
}
bufferLength =
@ -294,7 +306,8 @@ lanplus_rakp4_hmac_matches(const struct ipmi_session * session,
if (verbose > 2)
{
printbuf((const uint8_t *)buffer, bufferLength, ">> rakp4 mac input buffer");
printbuf(session->v2_data.sik, 20l, ">> rakp4 mac key (sik)");
printbuf(session->v2_data.sik, session->v2_data.sik_len,
">> rakp4 mac key (sik)");
}
@ -305,7 +318,7 @@ lanplus_rakp4_hmac_matches(const struct ipmi_session * session,
? session->v2_data.integrity_alg
: session->v2_data.auth_alg ,
session->v2_data.sik,
IPMI_SIK_BUFFER_SIZE,
session->v2_data.sik_len,
buffer,
bufferLength,
mac,
@ -317,12 +330,48 @@ lanplus_rakp4_hmac_matches(const struct ipmi_session * session,
printbuf(mac, macLength, ">> rakp4 mac as computed by the remote console");
}
if (ipmi_oem_active(intf, "intelplus")) {
/* Intel BMC responds with the integrity Algorithm in RAKP4 */
switch(session->v2_data.integrity_alg) {
case IPMI_INTEGRITY_HMAC_SHA1_96:
assert(macLength == IPMI_SHA_DIGEST_LENGTH);
cmpLength = IPMI_SHA1_AUTHCODE_SIZE;
break;
case IPMI_INTEGRITY_HMAC_MD5_128:
assert(macLength == IPMI_MD5_DIGEST_LENGTH);
cmpLength = IPMI_HMAC_MD5_AUTHCODE_SIZE;
break;
default:
assert(0);
break;
}
} else {
/* We don't yet support other algorithms */
switch(session->v2_data.auth_alg) {
case IPMI_AUTH_RAKP_HMAC_SHA1:
assert(macLength == IPMI_SHA_DIGEST_LENGTH);
cmpLength = IPMI_SHA1_AUTHCODE_SIZE;
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
assert(macLength == IPMI_MD5_DIGEST_LENGTH);
cmpLength = IPMI_HMAC_MD5_AUTHCODE_SIZE;
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
assert(macLength == IPMI_SHA256_DIGEST_LENGTH);
cmpLength = IPMI_HMAC_SHA256_AUTHCODE_SIZE;
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
assert(0);
break;
}
}
free(buffer);
buffer = NULL;
assert(macLength == 20);
return (memcmp(bmc_mac, mac, 12) == 0);
assert(macLength >= cmpLength);
return (memcmp(bmc_mac, mac, cmpLength) == 0);
}
@ -368,7 +417,12 @@ lanplus_generate_rakp3_authcode(uint8_t * output_buffer,
}
/* We don't yet support other algorithms */
assert(session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1);
assert((session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1)
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_MD5)
#ifdef HAVE_CRYPTO_SHA256
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA256)
#endif /* HAVE_CRYPTO_SHA256 */
);
input_buffer_length =
16 + /* Rc */
@ -478,13 +532,19 @@ lanplus_generate_sik(struct ipmi_session * session, struct ipmi_intf * intf)
uint32_t mac_length;
memset(session->v2_data.sik, 0, IPMI_SIK_BUFFER_SIZE);
memset(session->v2_data.sik, 0, sizeof(session->v2_data.sik));
session->v2_data.sik_len = 0;
if (session->v2_data.auth_alg == IPMI_AUTH_RAKP_NONE)
return 0;
/* We don't yet support other algorithms */
assert(session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1);
assert((session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA1)
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_MD5)
#ifdef HAVE_CRYPTO_SHA256
|| (session->v2_data.auth_alg == IPMI_AUTH_RAKP_HMAC_SHA256)
#endif /* HAVE_CRYPTO_SHA256 */
);
input_buffer_length =
16 + /* Rm */
@ -572,15 +632,33 @@ lanplus_generate_sik(struct ipmi_session * session, struct ipmi_intf * intf)
free(input_buffer);
input_buffer = NULL;
assert(mac_length == 20);
switch (session->v2_data.auth_alg) {
case IPMI_AUTH_RAKP_HMAC_SHA1:
assert(mac_length == IPMI_SHA_DIGEST_LENGTH);
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
assert(mac_length == IPMI_MD5_DIGEST_LENGTH);
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
assert(mac_length == IPMI_SHA256_DIGEST_LENGTH);
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
assert(0);
break;
}
session->v2_data.sik_len = mac_length;
/*
* The key MAC generated is 20 bytes, but we will only be using the first
* 12 for SHA1 96
*/
if (verbose >= 2)
printbuf(session->v2_data.sik, 20, "Generated session integrity key");
if (verbose >= 2) {
printbuf(session->v2_data.sik, session->v2_data.sik_len,
"Generated session integrity key");
}
return 0;
}
@ -614,16 +692,32 @@ lanplus_generate_k1(struct ipmi_session * session)
{
lanplus_HMAC(session->v2_data.auth_alg,
session->v2_data.sik,
IPMI_SIK_BUFFER_SIZE, /* SIK length */
session->v2_data.sik_len, /* SIK length */
CONST_1,
20,
session->v2_data.k1,
&mac_length);
assert(mac_length == 20);
switch (session->v2_data.auth_alg) {
case IPMI_AUTH_RAKP_HMAC_SHA1:
assert(mac_length == IPMI_SHA_DIGEST_LENGTH);
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
assert(mac_length == IPMI_MD5_DIGEST_LENGTH);
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
assert(mac_length == IPMI_SHA256_DIGEST_LENGTH);
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
assert(0);
break;
}
session->v2_data.k1_len = mac_length;
}
if (verbose >= 2)
printbuf(session->v2_data.k1, 20, "Generated K1");
printbuf(session->v2_data.k1, session->v2_data.k1_len, "Generated K1");
return 0;
}
@ -658,16 +752,32 @@ lanplus_generate_k2(struct ipmi_session * session)
{
lanplus_HMAC(session->v2_data.auth_alg,
session->v2_data.sik,
IPMI_SIK_BUFFER_SIZE, /* SIK length */
session->v2_data.sik_len, /* SIK length */
CONST_2,
20,
session->v2_data.k2,
&mac_length);
assert(mac_length == 20);
switch (session->v2_data.auth_alg) {
case IPMI_AUTH_RAKP_HMAC_SHA1:
assert(mac_length == IPMI_SHA_DIGEST_LENGTH);
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
assert(mac_length == IPMI_MD5_DIGEST_LENGTH);
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
assert(mac_length == IPMI_SHA256_DIGEST_LENGTH);
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
assert(0);
break;
}
session->v2_data.k2_len = mac_length;
}
if (verbose >= 2)
printbuf(session->v2_data.k2, 20, "Generated K2");
printbuf(session->v2_data.k2, session->v2_data.k2_len, "Generated K2");
return 0;
}
@ -803,6 +913,7 @@ lanplus_has_valid_auth_code(struct ipmi_rs * rs, struct ipmi_session * session)
uint8_t * bmc_authcode;
uint8_t generated_authcode[IPMI_MAX_MAC_SIZE];
uint32_t generated_authcode_length;
uint32_t authcode_length;
if ((rs->session.authtype != IPMI_SESSION_AUTHTYPE_RMCP_PLUS) ||
@ -811,36 +922,51 @@ lanplus_has_valid_auth_code(struct ipmi_rs * rs, struct ipmi_session * session)
(session->v2_data.integrity_alg == IPMI_INTEGRITY_NONE))
return 1;
/* We only support SHA1-96 now */
assert(session->v2_data.integrity_alg == IPMI_INTEGRITY_HMAC_SHA1_96);
switch (session->v2_data.integrity_alg) {
case IPMI_INTEGRITY_HMAC_SHA1_96:
authcode_length = IPMI_SHA1_AUTHCODE_SIZE;
break;
case IPMI_INTEGRITY_HMAC_MD5_128:
authcode_length = IPMI_HMAC_MD5_AUTHCODE_SIZE;
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_INTEGRITY_HMAC_SHA256_128:
authcode_length = IPMI_HMAC_SHA256_AUTHCODE_SIZE;
break;
#endif /* HAVE_CRYPTO_SHA256 */
/* Unsupported */
default:
assert(0);
break;
}
/*
* For SHA1-96, the authcode will be the last 12 bytes in the packet
* For SHA256-128 or MD5-128, the authcode will be the last 16 bytes in the packet
*/
bmc_authcode = rs->data + (rs->data_len - IPMI_SHA1_AUTHCODE_SIZE);
bmc_authcode = rs->data + (rs->data_len - authcode_length);
lanplus_HMAC(session->v2_data.integrity_alg,
session->v2_data.k1,
IPMI_AUTHCODE_BUFFER_SIZE,
session->v2_data.k1_len,
rs->data + IPMI_LANPLUS_OFFSET_AUTHTYPE,
rs->data_len - IPMI_LANPLUS_OFFSET_AUTHTYPE - IPMI_SHA1_AUTHCODE_SIZE,
rs->data_len - IPMI_LANPLUS_OFFSET_AUTHTYPE - authcode_length,
generated_authcode,
&generated_authcode_length);
if (verbose > 3)
{
lprintf(LOG_DEBUG+2, "Validating authcode");
printbuf(session->v2_data.k1, 20, "K1");
printbuf(session->v2_data.k1, session->v2_data.k1_len, "K1");
printbuf(rs->data + IPMI_LANPLUS_OFFSET_AUTHTYPE,
rs->data_len - IPMI_LANPLUS_OFFSET_AUTHTYPE - IPMI_SHA1_AUTHCODE_SIZE,
rs->data_len - IPMI_LANPLUS_OFFSET_AUTHTYPE - authcode_length,
"Authcode Input Data");
printbuf(generated_authcode, 12, "Generated authcode");
printbuf(bmc_authcode, 12, "Expected authcode");
printbuf(generated_authcode, generated_authcode_length, "Generated authcode");
printbuf(bmc_authcode, authcode_length, "Expected authcode");
}
assert(generated_authcode_length == 20);
return (memcmp(bmc_authcode, generated_authcode, 12) == 0);
assert(generated_authcode_length >= authcode_length);
return (memcmp(bmc_authcode, generated_authcode, authcode_length) == 0);
}

11
src/plugins/lanplus/lanplus_crypt_impl.c
View File

@ -99,7 +99,8 @@ lanplus_rand(uint8_t * buffer, uint32_t num_bytes)
/*
* lanplus_HMAC
*
* param mac specifies the algorithm to be used, currently only SHA1 is supported
* param mac specifies the algorithm to be used, currently SHA1, SHA256 and MD5
* are supported
* param key is the key used for HMAC generation
* param key_len is the lenght of key
* param d is the data to be MAC'd
@ -123,6 +124,14 @@ lanplus_HMAC(uint8_t mac,
if ((mac == IPMI_AUTH_RAKP_HMAC_SHA1) ||
(mac == IPMI_INTEGRITY_HMAC_SHA1_96))
evp_md = EVP_sha1();
else if ((mac == IPMI_AUTH_RAKP_HMAC_MD5) ||
(mac == IPMI_INTEGRITY_HMAC_MD5_128))
evp_md = EVP_md5();
#ifdef HAVE_CRYPTO_SHA256
else if ((mac == IPMI_AUTH_RAKP_HMAC_SHA256) ||
(mac == IPMI_INTEGRITY_HMAC_SHA256_128))
evp_md = EVP_sha256();
#endif /* HAVE_CRYPTO_SHA256 */
else
{
lprintf(LOG_DEBUG, "Invalid mac type 0x%x in lanplus_HMAC\n", mac);

39
src/plugins/lanplus/lanplus_dump.c
View File

@ -31,6 +31,7 @@
*/
#include "lanplus.h"
#include "lanplus_crypt.h"
#include "lanplus_dump.h"
extern const struct valstr ipmi_rakp_return_codes[];
@ -127,16 +128,27 @@ void lanplus_dump_rakp2_message(const struct ipmi_rs * rsp, uint8_t auth_alg)
break;
case IPMI_AUTH_RAKP_HMAC_SHA1:
printf("%s Key exchange auth code [sha1] : 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < 20; ++i)
for (i = 0; i < IPMI_SHA_DIGEST_LENGTH; ++i) {
printf("%02x", rsp->payload.rakp2_message.key_exchange_auth_code[i]);
printf("\n");
}
printf("\n");
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
printf("%s Key exchange auth code [md5] : 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < 16; ++i)
for (i = 0; i < IPMI_MD5_DIGEST_LENGTH; ++i) {
printf("%02x", rsp->payload.rakp2_message.key_exchange_auth_code[i]);
printf("\n");
}
printf("\n");
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
printf("%s Key exchange auth code [sha256]: 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < IPMI_SHA256_DIGEST_LENGTH; ++i) {
printf("%02x", rsp->payload.rakp2_message.key_exchange_auth_code[i]);
}
printf("\n");
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
printf("%s Key exchange auth code : invalid", DUMP_PREFIX_INCOMING);
}
@ -174,16 +186,27 @@ void lanplus_dump_rakp4_message(const struct ipmi_rs * rsp, uint8_t auth_alg)
break;
case IPMI_AUTH_RAKP_HMAC_SHA1:
printf("%s Key exchange auth code [sha1] : 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < 12; ++i)
for (i = 0; i < IPMI_SHA1_AUTHCODE_SIZE; ++i) {
printf("%02x", rsp->payload.rakp4_message.integrity_check_value[i]);
printf("\n");
}
printf("\n");
break;
case IPMI_AUTH_RAKP_HMAC_MD5:
printf("%s Key exchange auth code [md5] : 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < 12; ++i)
for (i = 0; i < IPMI_HMAC_MD5_AUTHCODE_SIZE; ++i) {
printf("%02x", rsp->payload.rakp4_message.integrity_check_value[i]);
printf("\n");
}
printf("\n");
break;
#ifdef HAVE_CRYPTO_SHA256
case IPMI_AUTH_RAKP_HMAC_SHA256:
printf("%s Key exchange auth code [sha256]: 0x", DUMP_PREFIX_INCOMING);
for (i = 0; i < IPMI_HMAC_SHA256_AUTHCODE_SIZE; ++i) {
printf("%02x", rsp->payload.rakp4_message.integrity_check_value[i]);
}
printf("\n");
break;
#endif /* HAVE_CRYPTO_SHA256 */
default:
printf("%s Key exchange auth code : invalid", DUMP_PREFIX_INCOMING);
}