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re-organize and add 3DES code

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9000 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
2000-08-27 03:50:07 +00:00
parent 669029d224
commit 4a97b49895
2 changed files with 368 additions and 36 deletions
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202
lib/gssapi/get_mic.c
View File

@@ -35,19 +35,21 @@
RCSID("$Id$");
OM_uint32 gss_get_mic
static OM_uint32
mic_des
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token
gss_buffer_t message_token,
krb5_keyblock *key
)
{
u_char *p;
MD5_CTX md5;
u_char hash[16];
des_key_schedule schedule;
des_cblock key;
des_cblock deskey;
des_cblock zero;
int32_t seq_number;
size_t len, total_len;
@@ -56,42 +58,44 @@ OM_uint32 gss_get_mic
message_token->length = total_len;
message_token->value = malloc (total_len);
if (message_token->value == NULL)
if (message_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = gssapi_krb5_make_header(message_token->value,
len,
"\x01\x01");
"\x01\x01"); /* TOK_ID */
memcpy (p, "\x00\x00", 2);
memcpy (p, "\x00\x00", 2); /* SGN_ALG = DES MAC MD5 */
p += 2;
memcpy (p, "\xff\xff\xff\xff", 4);
memcpy (p, "\xff\xff\xff\xff", 4); /* Filler */
p += 4;
/* Fill in later */
/* Fill in later (SND-SEQ) */
memset (p, 0, 16);
p += 16;
/* checksum */
MD5Init (&md5);
MD5Update (&md5, p - 24, 8);
MD5Update (&md5, message_buffer->value,
message_buffer->length);
MD5Update (&md5, message_buffer->value, message_buffer->length);
MD5Final (hash, &md5);
memset (&zero, 0, sizeof(zero));
gss_krb5_getsomekey(context_handle, &key);
des_set_key (&key, schedule);
des_cbc_cksum ((void *)hash, (void *)hash, sizeof(hash),
memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
des_set_key (&deskey, schedule);
des_cbc_cksum ((const void *)hash, (void *)hash, sizeof(hash),
schedule, &zero);
memcpy (p - 8, hash, 8);
memcpy (p - 8, hash, 8); /* SGN_CKSUM */
/* sequence number */
krb5_auth_getlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
&seq_number);
p -= 16;
p -= 16; /* SND_SEQ */
p[0] = (seq_number >> 0) & 0xFF;
p[1] = (seq_number >> 8) & 0xFF;
p[2] = (seq_number >> 16) & 0xFF;
@@ -100,16 +104,178 @@ OM_uint32 gss_get_mic
(context_handle->more_flags & LOCAL) ? 0 : 0xFF,
4);
des_set_key (&key, schedule);
des_cbc_encrypt ((void *)p, (void *)p, 8,
des_set_key (&deskey, schedule);
des_cbc_encrypt ((const void *)p, (void *)p, 8,
schedule, (des_cblock *)(p + 8), DES_ENCRYPT);
krb5_auth_setlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
++seq_number);
memset (key, 0, sizeof(key));
memset (deskey, 0, sizeof(deskey));
memset (schedule, 0, sizeof(schedule));
return GSS_S_COMPLETE;
}
static OM_uint32
mic_des3
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token,
krb5_keyblock *key
)
{
u_char *p;
Checksum cksum;
u_char seq[8];
int32_t seq_number;
size_t len, total_len;
krb5_crypto crypto;
krb5_error_code kret;
krb5_data encdata;
char *tmp;
gssapi_krb5_encap_length (36, &len, &total_len);
message_token->length = total_len;
message_token->value = malloc (total_len);
if (message_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = gssapi_krb5_make_header(message_token->value,
len,
"\x01\x01"); /* TOK-ID */
memcpy (p, "\x04\x00", 2); /* SGN_ALG = HMAC SHA1 DES3-KD */
p += 2;
memcpy (p, "\xff\xff\xff\xff", 4); /* filler */
p += 4;
/* this should be done in parts */
tmp = malloc (message_buffer->length + 8);
if (tmp == NULL) {
free (message_token->value);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy (tmp, p - 8, 8);
memcpy (tmp + 8, message_buffer->value, message_buffer->length);
kret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
if (kret) {
free (message_token->value);
free (tmp);
*minor_status = kret;
return GSS_S_FAILURE;
}
kret = krb5_create_checksum (gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SIGN,
tmp,
message_buffer->length + 8,
&cksum);
free (tmp);
krb5_crypto_destroy (gssapi_krb5_context, crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
memcpy (p + 8, cksum.checksum.data, cksum.checksum.length);
/* sequence number */
krb5_auth_getlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
&seq_number);
seq[0] = (seq_number >> 0) & 0xFF;
seq[1] = (seq_number >> 8) & 0xFF;
seq[2] = (seq_number >> 16) & 0xFF;
seq[3] = (seq_number >> 24) & 0xFF;
memset (seq + 4,
(context_handle->more_flags & LOCAL) ? 0 : 0xFF,
4);
kret = krb5_crypto_init(gssapi_krb5_context, key,
ETYPE_DES3_CBC_NONE, &crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
kret = krb5_encrypt (gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SEQ,
seq, 8, &encdata);
krb5_crypto_destroy (gssapi_krb5_context, crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
assert (encdata.length == 8);
memcpy (p, encdata.data, encdata.length);
krb5_data_free (&encdata);
p += 8 + cksum.checksum.length;
memcpy (p, message_buffer->value, message_buffer->length);
krb5_auth_setlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
++seq_number);
free_Checksum (&cksum);
return GSS_S_COMPLETE;
}
OM_uint32 gss_get_mic
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token
)
{
krb5_keyblock *key;
OM_uint32 ret;
krb5_keytype keytype;
ret = gss_krb5_getsomekey(context_handle, &key);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype);
switch (keytype) {
case KEYTYPE_DES :
ret = mic_des (minor_status, context_handle, qop_req,
message_buffer, message_token, key);
break;
case KEYTYPE_DES3 :
ret = mic_des3 (minor_status, context_handle, qop_req,
message_buffer, message_token, key);
break;
default :
*minor_status = KRB5_PROG_ETYPE_NOSUPP;
ret = GSS_S_FAILURE;
break;
}
krb5_free_keyblock (gssapi_krb5_context, key);
return ret;
}

202
lib/gssapi/krb5/get_mic.c
View File

@@ -35,19 +35,21 @@
RCSID("$Id$");
OM_uint32 gss_get_mic
static OM_uint32
mic_des
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token
gss_buffer_t message_token,
krb5_keyblock *key
)
{
u_char *p;
MD5_CTX md5;
u_char hash[16];
des_key_schedule schedule;
des_cblock key;
des_cblock deskey;
des_cblock zero;
int32_t seq_number;
size_t len, total_len;
@@ -56,42 +58,44 @@ OM_uint32 gss_get_mic
message_token->length = total_len;
message_token->value = malloc (total_len);
if (message_token->value == NULL)
if (message_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = gssapi_krb5_make_header(message_token->value,
len,
"\x01\x01");
"\x01\x01"); /* TOK_ID */
memcpy (p, "\x00\x00", 2);
memcpy (p, "\x00\x00", 2); /* SGN_ALG = DES MAC MD5 */
p += 2;
memcpy (p, "\xff\xff\xff\xff", 4);
memcpy (p, "\xff\xff\xff\xff", 4); /* Filler */
p += 4;
/* Fill in later */
/* Fill in later (SND-SEQ) */
memset (p, 0, 16);
p += 16;
/* checksum */
MD5Init (&md5);
MD5Update (&md5, p - 24, 8);
MD5Update (&md5, message_buffer->value,
message_buffer->length);
MD5Update (&md5, message_buffer->value, message_buffer->length);
MD5Final (hash, &md5);
memset (&zero, 0, sizeof(zero));
gss_krb5_getsomekey(context_handle, &key);
des_set_key (&key, schedule);
des_cbc_cksum ((void *)hash, (void *)hash, sizeof(hash),
memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
des_set_key (&deskey, schedule);
des_cbc_cksum ((const void *)hash, (void *)hash, sizeof(hash),
schedule, &zero);
memcpy (p - 8, hash, 8);
memcpy (p - 8, hash, 8); /* SGN_CKSUM */
/* sequence number */
krb5_auth_getlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
&seq_number);
p -= 16;
p -= 16; /* SND_SEQ */
p[0] = (seq_number >> 0) & 0xFF;
p[1] = (seq_number >> 8) & 0xFF;
p[2] = (seq_number >> 16) & 0xFF;
@@ -100,16 +104,178 @@ OM_uint32 gss_get_mic
(context_handle->more_flags & LOCAL) ? 0 : 0xFF,
4);
des_set_key (&key, schedule);
des_cbc_encrypt ((void *)p, (void *)p, 8,
des_set_key (&deskey, schedule);
des_cbc_encrypt ((const void *)p, (void *)p, 8,
schedule, (des_cblock *)(p + 8), DES_ENCRYPT);
krb5_auth_setlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
++seq_number);
memset (key, 0, sizeof(key));
memset (deskey, 0, sizeof(deskey));
memset (schedule, 0, sizeof(schedule));
return GSS_S_COMPLETE;
}
static OM_uint32
mic_des3
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token,
krb5_keyblock *key
)
{
u_char *p;
Checksum cksum;
u_char seq[8];
int32_t seq_number;
size_t len, total_len;
krb5_crypto crypto;
krb5_error_code kret;
krb5_data encdata;
char *tmp;
gssapi_krb5_encap_length (36, &len, &total_len);
message_token->length = total_len;
message_token->value = malloc (total_len);
if (message_token->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
p = gssapi_krb5_make_header(message_token->value,
len,
"\x01\x01"); /* TOK-ID */
memcpy (p, "\x04\x00", 2); /* SGN_ALG = HMAC SHA1 DES3-KD */
p += 2;
memcpy (p, "\xff\xff\xff\xff", 4); /* filler */
p += 4;
/* this should be done in parts */
tmp = malloc (message_buffer->length + 8);
if (tmp == NULL) {
free (message_token->value);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy (tmp, p - 8, 8);
memcpy (tmp + 8, message_buffer->value, message_buffer->length);
kret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
if (kret) {
free (message_token->value);
free (tmp);
*minor_status = kret;
return GSS_S_FAILURE;
}
kret = krb5_create_checksum (gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SIGN,
tmp,
message_buffer->length + 8,
&cksum);
free (tmp);
krb5_crypto_destroy (gssapi_krb5_context, crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
memcpy (p + 8, cksum.checksum.data, cksum.checksum.length);
/* sequence number */
krb5_auth_getlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
&seq_number);
seq[0] = (seq_number >> 0) & 0xFF;
seq[1] = (seq_number >> 8) & 0xFF;
seq[2] = (seq_number >> 16) & 0xFF;
seq[3] = (seq_number >> 24) & 0xFF;
memset (seq + 4,
(context_handle->more_flags & LOCAL) ? 0 : 0xFF,
4);
kret = krb5_crypto_init(gssapi_krb5_context, key,
ETYPE_DES3_CBC_NONE, &crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
kret = krb5_encrypt (gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SEQ,
seq, 8, &encdata);
krb5_crypto_destroy (gssapi_krb5_context, crypto);
if (kret) {
free (message_token->value);
*minor_status = kret;
return GSS_S_FAILURE;
}
assert (encdata.length == 8);
memcpy (p, encdata.data, encdata.length);
krb5_data_free (&encdata);
p += 8 + cksum.checksum.length;
memcpy (p, message_buffer->value, message_buffer->length);
krb5_auth_setlocalseqnumber (gssapi_krb5_context,
context_handle->auth_context,
++seq_number);
free_Checksum (&cksum);
return GSS_S_COMPLETE;
}
OM_uint32 gss_get_mic
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
gss_qop_t qop_req,
const gss_buffer_t message_buffer,
gss_buffer_t message_token
)
{
krb5_keyblock *key;
OM_uint32 ret;
krb5_keytype keytype;
ret = gss_krb5_getsomekey(context_handle, &key);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype);
switch (keytype) {
case KEYTYPE_DES :
ret = mic_des (minor_status, context_handle, qop_req,
message_buffer, message_token, key);
break;
case KEYTYPE_DES3 :
ret = mic_des3 (minor_status, context_handle, qop_req,
message_buffer, message_token, key);
break;
default :
*minor_status = KRB5_PROG_ETYPE_NOSUPP;
ret = GSS_S_FAILURE;
break;
}
krb5_free_keyblock (gssapi_krb5_context, key);
return ret;
}