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rrc_rotate() was untested and broken, fix it

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set and verify wrap Token->Filler
correct token ID for wrap tokens, were accidentally swapped with delete tokens
From: Luke Howard <lukeh@PADL.COM>


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12904 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2003-09-22 21:46:53 +00:00
parent 42835d4b52
commit 7c533af43a
2 changed files with 60 additions and 26 deletions
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43
lib/gssapi/krb5/cfx.c
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@@ -140,11 +140,15 @@ OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status,
}
/*
* Rotate rightmost "rrc" bytes to the front.
* Rotate "rrc" bytes to the front or back
*/
static krb5_error_code rrc_rotate(void *data, size_t len, u_int16_t rrc)
static krb5_error_code rrc_rotate(void *data,
size_t len,
u_int16_t rrc,
krb5_boolean unrotate)
{
u_char *tmp;
size_t left;
if (rrc == 0) {
return 0;
@@ -154,14 +158,22 @@ static krb5_error_code rrc_rotate(void *data, size_t len, u_int16_t rrc)
return ERANGE;
}
left = len - rrc;
tmp = malloc(rrc);
if (tmp == NULL) {
return ENOMEM;
}
memcpy(tmp, (u_char *)data + len - rrc, rrc);
memmove((u_char *)data + rrc, data, len - rrc);
memcpy(data, tmp, rrc);
if (unrotate) {
memcpy(tmp, data, rrc);
memmove(data, (u_char *)data + rrc, left);
memcpy((u_char *)data + left, tmp, rrc);
} else {
memcpy(tmp, (u_char *)data + left, rrc);
memmove((u_char *)data + rrc, data, left);
memcpy(data, tmp, rrc);
}
free(tmp);
@@ -221,9 +233,10 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
p = output_message_buffer->value;
token = (gss_cfx_wrap_token)p;
token->TOK_ID[0] = 0x05;
token->TOK_ID[1] = 0x04;
token->Flags = 0;
token->TOK_ID[0] = 0x04;
token->TOK_ID[1] = 0x05;
token->Flags = 0;
token->Filler = 0xFF;
if ((context_handle->more_flags & LOCAL) == 0)
token->Flags |= SentByAcceptor;
if (conf_req_flag) {
@@ -318,7 +331,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
token->RRC[0] = (rrc >> 0) & 0xFF;
token->RRC[1] = (rrc >> 8) & 0xFF;
ret = rrc_rotate(cipher.data, cipher.length, rrc);
ret = rrc_rotate(cipher.data, cipher.length, rrc, FALSE);
if (ret != 0) {
gssapi_krb5_set_error_string();
*minor_status = ret;
@@ -370,7 +383,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
cksum.checksum.data, cksum.checksum.length);
ret = rrc_rotate(p,
input_message_buffer->length + cksum.checksum.length, rrc);
input_message_buffer->length + cksum.checksum.length, rrc, FALSE);
if (ret != 0) {
gssapi_krb5_set_error_string();
*minor_status = ret;
@@ -420,7 +433,7 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status,
token = (gss_cfx_wrap_token)p;
if (token->TOK_ID[0] != 0x05 || token->TOK_ID[1] != 0x04) {
if (token->TOK_ID[0] != 0x04 || token->TOK_ID[1] != 0x05) {
return GSS_S_DEFECTIVE_TOKEN;
}
@@ -434,6 +447,10 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status,
return GSS_S_DEFECTIVE_TOKEN;
}
if (token->Filler != 0xFF) {
return GSS_S_DEFECTIVE_TOKEN;
}
if (conf_state != NULL) {
*conf_state = (token->Flags & Sealed) ? 1 : 0;
}
@@ -483,7 +500,7 @@ OM_uint32 _gssapi_unwrap_cfx(OM_uint32 *minor_status,
len -= (p - (u_char *)input_message_buffer->value);
/* Rotate by RRC; bogus to do this in-place XXX */
*minor_status = rrc_rotate(p, len, rrc);
*minor_status = rrc_rotate(p, len, rrc, TRUE);
if (*minor_status != 0) {
krb5_crypto_destroy(gssapi_krb5_context, crypto);
return GSS_S_FAILURE;