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-rw-r--r--crypto/heimdal/lib/gssapi/krb5/arcfour.c760
1 files changed, 0 insertions, 760 deletions
diff --git a/crypto/heimdal/lib/gssapi/krb5/arcfour.c b/crypto/heimdal/lib/gssapi/krb5/arcfour.c
deleted file mode 100644
index 032da36..0000000
--- a/crypto/heimdal/lib/gssapi/krb5/arcfour.c
+++ /dev/null
@@ -1,760 +0,0 @@
-/*
- * Copyright (c) 2003 - 2006 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include "krb5/gsskrb5_locl.h"
-
-RCSID("$Id: arcfour.c 19031 2006-11-13 18:02:57Z lha $");
-
-/*
- * Implements draft-brezak-win2k-krb-rc4-hmac-04.txt
- *
- * The arcfour message have the following formats:
- *
- * MIC token
- * TOK_ID[2] = 01 01
- * SGN_ALG[2] = 11 00
- * Filler[4]
- * SND_SEQ[8]
- * SGN_CKSUM[8]
- *
- * WRAP token
- * TOK_ID[2] = 02 01
- * SGN_ALG[2];
- * SEAL_ALG[2]
- * Filler[2]
- * SND_SEQ[2]
- * SGN_CKSUM[8]
- * Confounder[8]
- */
-
-/*
- * WRAP in DCE-style have a fixed size header, the oid and length over
- * the WRAP header is a total of
- * GSS_ARCFOUR_WRAP_TOKEN_DCE_DER_HEADER_SIZE +
- * GSS_ARCFOUR_WRAP_TOKEN_SIZE byte (ie total of 45 bytes overhead,
- * remember the 2 bytes from APPL [0] SEQ).
- */
-
-#define GSS_ARCFOUR_WRAP_TOKEN_SIZE 32
-#define GSS_ARCFOUR_WRAP_TOKEN_DCE_DER_HEADER_SIZE 13
-
-
-static krb5_error_code
-arcfour_mic_key(krb5_context context, krb5_keyblock *key,
- void *cksum_data, size_t cksum_size,
- void *key6_data, size_t key6_size)
-{
- krb5_error_code ret;
-
- Checksum cksum_k5;
- krb5_keyblock key5;
- char k5_data[16];
-
- Checksum cksum_k6;
-
- char T[4];
-
- memset(T, 0, 4);
- cksum_k5.checksum.data = k5_data;
- cksum_k5.checksum.length = sizeof(k5_data);
-
- if (key->keytype == KEYTYPE_ARCFOUR_56) {
- char L40[14] = "fortybits";
-
- memcpy(L40 + 10, T, sizeof(T));
- ret = krb5_hmac(context, CKSUMTYPE_RSA_MD5,
- L40, 14, 0, key, &cksum_k5);
- memset(&k5_data[7], 0xAB, 9);
- } else {
- ret = krb5_hmac(context, CKSUMTYPE_RSA_MD5,
- T, 4, 0, key, &cksum_k5);
- }
- if (ret)
- return ret;
-
- key5.keytype = KEYTYPE_ARCFOUR;
- key5.keyvalue = cksum_k5.checksum;
-
- cksum_k6.checksum.data = key6_data;
- cksum_k6.checksum.length = key6_size;
-
- return krb5_hmac(context, CKSUMTYPE_RSA_MD5,
- cksum_data, cksum_size, 0, &key5, &cksum_k6);
-}
-
-
-static krb5_error_code
-arcfour_mic_cksum(krb5_context context,
- krb5_keyblock *key, unsigned usage,
- u_char *sgn_cksum, size_t sgn_cksum_sz,
- const u_char *v1, size_t l1,
- const void *v2, size_t l2,
- const void *v3, size_t l3)
-{
- Checksum CKSUM;
- u_char *ptr;
- size_t len;
- krb5_crypto crypto;
- krb5_error_code ret;
-
- assert(sgn_cksum_sz == 8);
-
- len = l1 + l2 + l3;
-
- ptr = malloc(len);
- if (ptr == NULL)
- return ENOMEM;
-
- memcpy(ptr, v1, l1);
- memcpy(ptr + l1, v2, l2);
- memcpy(ptr + l1 + l2, v3, l3);
-
- ret = krb5_crypto_init(context, key, 0, &crypto);
- if (ret) {
- free(ptr);
- return ret;
- }
-
- ret = krb5_create_checksum(context,
- crypto,
- usage,
- 0,
- ptr, len,
- &CKSUM);
- free(ptr);
- if (ret == 0) {
- memcpy(sgn_cksum, CKSUM.checksum.data, sgn_cksum_sz);
- free_Checksum(&CKSUM);
- }
- krb5_crypto_destroy(context, crypto);
-
- return ret;
-}
-
-
-OM_uint32
-_gssapi_get_mic_arcfour(OM_uint32 * minor_status,
- const gsskrb5_ctx context_handle,
- krb5_context context,
- gss_qop_t qop_req,
- const gss_buffer_t message_buffer,
- gss_buffer_t message_token,
- krb5_keyblock *key)
-{
- krb5_error_code ret;
- int32_t seq_number;
- size_t len, total_len;
- u_char k6_data[16], *p0, *p;
- RC4_KEY rc4_key;
-
- _gsskrb5_encap_length (22, &len, &total_len, GSS_KRB5_MECHANISM);
-
- message_token->length = total_len;
- message_token->value = malloc (total_len);
- if (message_token->value == NULL) {
- *minor_status = ENOMEM;
- return GSS_S_FAILURE;
- }
-
- p0 = _gssapi_make_mech_header(message_token->value,
- len,
- GSS_KRB5_MECHANISM);
- p = p0;
-
- *p++ = 0x01; /* TOK_ID */
- *p++ = 0x01;
- *p++ = 0x11; /* SGN_ALG */
- *p++ = 0x00;
- *p++ = 0xff; /* Filler */
- *p++ = 0xff;
- *p++ = 0xff;
- *p++ = 0xff;
-
- p = NULL;
-
- ret = arcfour_mic_cksum(context,
- key, KRB5_KU_USAGE_SIGN,
- p0 + 16, 8, /* SGN_CKSUM */
- p0, 8, /* TOK_ID, SGN_ALG, Filer */
- message_buffer->value, message_buffer->length,
- NULL, 0);
- if (ret) {
- _gsskrb5_release_buffer(minor_status, message_token);
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- ret = arcfour_mic_key(context, key,
- p0 + 16, 8, /* SGN_CKSUM */
- k6_data, sizeof(k6_data));
- if (ret) {
- _gsskrb5_release_buffer(minor_status, message_token);
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
- krb5_auth_con_getlocalseqnumber (context,
- context_handle->auth_context,
- &seq_number);
- p = p0 + 8; /* SND_SEQ */
- _gsskrb5_encode_be_om_uint32(seq_number, p);
-
- krb5_auth_con_setlocalseqnumber (context,
- context_handle->auth_context,
- ++seq_number);
- HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
-
- memset (p + 4, (context_handle->more_flags & LOCAL) ? 0 : 0xff, 4);
-
- RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
- RC4 (&rc4_key, 8, p, p);
-
- memset(&rc4_key, 0, sizeof(rc4_key));
- memset(k6_data, 0, sizeof(k6_data));
-
- *minor_status = 0;
- return GSS_S_COMPLETE;
-}
-
-
-OM_uint32
-_gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
- const gsskrb5_ctx context_handle,
- krb5_context context,
- const gss_buffer_t message_buffer,
- const gss_buffer_t token_buffer,
- gss_qop_t * qop_state,
- krb5_keyblock *key,
- char *type)
-{
- krb5_error_code ret;
- uint32_t seq_number;
- OM_uint32 omret;
- u_char SND_SEQ[8], cksum_data[8], *p;
- char k6_data[16];
- int cmp;
-
- if (qop_state)
- *qop_state = 0;
-
- p = token_buffer->value;
- omret = _gsskrb5_verify_header (&p,
- token_buffer->length,
- (u_char *)type,
- GSS_KRB5_MECHANISM);
- if (omret)
- return omret;
-
- if (memcmp(p, "\x11\x00", 2) != 0) /* SGN_ALG = HMAC MD5 ARCFOUR */
- return GSS_S_BAD_SIG;
- p += 2;
- if (memcmp (p, "\xff\xff\xff\xff", 4) != 0)
- return GSS_S_BAD_MIC;
- p += 4;
-
- ret = arcfour_mic_cksum(context,
- key, KRB5_KU_USAGE_SIGN,
- cksum_data, sizeof(cksum_data),
- p - 8, 8,
- message_buffer->value, message_buffer->length,
- NULL, 0);
- if (ret) {
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- ret = arcfour_mic_key(context, key,
- cksum_data, sizeof(cksum_data),
- k6_data, sizeof(k6_data));
- if (ret) {
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- cmp = memcmp(cksum_data, p + 8, 8);
- if (cmp) {
- *minor_status = 0;
- return GSS_S_BAD_MIC;
- }
-
- {
- RC4_KEY rc4_key;
-
- RC4_set_key (&rc4_key, sizeof(k6_data), (void*)k6_data);
- RC4 (&rc4_key, 8, p, SND_SEQ);
-
- memset(&rc4_key, 0, sizeof(rc4_key));
- memset(k6_data, 0, sizeof(k6_data));
- }
-
- _gsskrb5_decode_be_om_uint32(SND_SEQ, &seq_number);
-
- if (context_handle->more_flags & LOCAL)
- cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
- else
- cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
-
- memset(SND_SEQ, 0, sizeof(SND_SEQ));
- if (cmp != 0) {
- *minor_status = 0;
- return GSS_S_BAD_MIC;
- }
-
- HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
- omret = _gssapi_msg_order_check(context_handle->order, seq_number);
- HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
- if (omret)
- return omret;
-
- *minor_status = 0;
- return GSS_S_COMPLETE;
-}
-
-OM_uint32
-_gssapi_wrap_arcfour(OM_uint32 * minor_status,
- const gsskrb5_ctx context_handle,
- krb5_context context,
- int conf_req_flag,
- gss_qop_t qop_req,
- const gss_buffer_t input_message_buffer,
- int * conf_state,
- gss_buffer_t output_message_buffer,
- krb5_keyblock *key)
-{
- u_char Klocaldata[16], k6_data[16], *p, *p0;
- size_t len, total_len, datalen;
- krb5_keyblock Klocal;
- krb5_error_code ret;
- int32_t seq_number;
-
- if (conf_state)
- *conf_state = 0;
-
- datalen = input_message_buffer->length;
-
- if (IS_DCE_STYLE(context_handle)) {
- len = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
- _gssapi_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
- total_len += datalen;
- } else {
- datalen += 1; /* padding */
- len = datalen + GSS_ARCFOUR_WRAP_TOKEN_SIZE;
- _gssapi_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
- }
-
- output_message_buffer->length = total_len;
- output_message_buffer->value = malloc (total_len);
- if (output_message_buffer->value == NULL) {
- *minor_status = ENOMEM;
- return GSS_S_FAILURE;
- }
-
- p0 = _gssapi_make_mech_header(output_message_buffer->value,
- len,
- GSS_KRB5_MECHANISM);
- p = p0;
-
- *p++ = 0x02; /* TOK_ID */
- *p++ = 0x01;
- *p++ = 0x11; /* SGN_ALG */
- *p++ = 0x00;
- if (conf_req_flag) {
- *p++ = 0x10; /* SEAL_ALG */
- *p++ = 0x00;
- } else {
- *p++ = 0xff; /* SEAL_ALG */
- *p++ = 0xff;
- }
- *p++ = 0xff; /* Filler */
- *p++ = 0xff;
-
- p = NULL;
-
- HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
- krb5_auth_con_getlocalseqnumber (context,
- context_handle->auth_context,
- &seq_number);
-
- _gsskrb5_encode_be_om_uint32(seq_number, p0 + 8);
-
- krb5_auth_con_setlocalseqnumber (context,
- context_handle->auth_context,
- ++seq_number);
- HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
-
- memset (p0 + 8 + 4,
- (context_handle->more_flags & LOCAL) ? 0 : 0xff,
- 4);
-
- krb5_generate_random_block(p0 + 24, 8); /* fill in Confounder */
-
- /* p points to data */
- p = p0 + GSS_ARCFOUR_WRAP_TOKEN_SIZE;
- memcpy(p, input_message_buffer->value, input_message_buffer->length);
-
- if (!IS_DCE_STYLE(context_handle))
- p[input_message_buffer->length] = 1; /* padding */
-
- ret = arcfour_mic_cksum(context,
- key, KRB5_KU_USAGE_SEAL,
- p0 + 16, 8, /* SGN_CKSUM */
- p0, 8, /* TOK_ID, SGN_ALG, SEAL_ALG, Filler */
- p0 + 24, 8, /* Confounder */
- p0 + GSS_ARCFOUR_WRAP_TOKEN_SIZE,
- datalen);
- if (ret) {
- *minor_status = ret;
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- return GSS_S_FAILURE;
- }
-
- {
- int i;
-
- Klocal.keytype = key->keytype;
- Klocal.keyvalue.data = Klocaldata;
- Klocal.keyvalue.length = sizeof(Klocaldata);
-
- for (i = 0; i < 16; i++)
- Klocaldata[i] = ((u_char *)key->keyvalue.data)[i] ^ 0xF0;
- }
- ret = arcfour_mic_key(context, &Klocal,
- p0 + 8, 4, /* SND_SEQ */
- k6_data, sizeof(k6_data));
- memset(Klocaldata, 0, sizeof(Klocaldata));
- if (ret) {
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
-
- if(conf_req_flag) {
- RC4_KEY rc4_key;
-
- RC4_set_key (&rc4_key, sizeof(k6_data), (void *)k6_data);
- /* XXX ? */
- RC4 (&rc4_key, 8 + datalen, p0 + 24, p0 + 24); /* Confounder + data */
- memset(&rc4_key, 0, sizeof(rc4_key));
- }
- memset(k6_data, 0, sizeof(k6_data));
-
- ret = arcfour_mic_key(context, key,
- p0 + 16, 8, /* SGN_CKSUM */
- k6_data, sizeof(k6_data));
- if (ret) {
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- {
- RC4_KEY rc4_key;
-
- RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
- RC4 (&rc4_key, 8, p0 + 8, p0 + 8); /* SND_SEQ */
- memset(&rc4_key, 0, sizeof(rc4_key));
- memset(k6_data, 0, sizeof(k6_data));
- }
-
- if (conf_state)
- *conf_state = conf_req_flag;
-
- *minor_status = 0;
- return GSS_S_COMPLETE;
-}
-
-OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
- const gsskrb5_ctx context_handle,
- krb5_context context,
- const gss_buffer_t input_message_buffer,
- gss_buffer_t output_message_buffer,
- int *conf_state,
- gss_qop_t *qop_state,
- krb5_keyblock *key)
-{
- u_char Klocaldata[16];
- krb5_keyblock Klocal;
- krb5_error_code ret;
- uint32_t seq_number;
- size_t datalen;
- OM_uint32 omret;
- u_char k6_data[16], SND_SEQ[8], Confounder[8];
- u_char cksum_data[8];
- u_char *p, *p0;
- int cmp;
- int conf_flag;
- size_t padlen = 0, len;
-
- if (conf_state)
- *conf_state = 0;
- if (qop_state)
- *qop_state = 0;
-
- p0 = input_message_buffer->value;
-
- if (IS_DCE_STYLE(context_handle)) {
- len = GSS_ARCFOUR_WRAP_TOKEN_SIZE +
- GSS_ARCFOUR_WRAP_TOKEN_DCE_DER_HEADER_SIZE;
- if (input_message_buffer->length < len)
- return GSS_S_BAD_MECH;
- } else {
- len = input_message_buffer->length;
- }
-
- omret = _gssapi_verify_mech_header(&p0,
- len,
- GSS_KRB5_MECHANISM);
- if (omret)
- return omret;
-
- /* length of mech header */
- len = (p0 - (u_char *)input_message_buffer->value) +
- GSS_ARCFOUR_WRAP_TOKEN_SIZE;
-
- if (len > input_message_buffer->length)
- return GSS_S_BAD_MECH;
-
- /* length of data */
- datalen = input_message_buffer->length - len;
-
- p = p0;
-
- if (memcmp(p, "\x02\x01", 2) != 0)
- return GSS_S_BAD_SIG;
- p += 2;
- if (memcmp(p, "\x11\x00", 2) != 0) /* SGN_ALG = HMAC MD5 ARCFOUR */
- return GSS_S_BAD_SIG;
- p += 2;
-
- if (memcmp (p, "\x10\x00", 2) == 0)
- conf_flag = 1;
- else if (memcmp (p, "\xff\xff", 2) == 0)
- conf_flag = 0;
- else
- return GSS_S_BAD_SIG;
-
- p += 2;
- if (memcmp (p, "\xff\xff", 2) != 0)
- return GSS_S_BAD_MIC;
- p = NULL;
-
- ret = arcfour_mic_key(context, key,
- p0 + 16, 8, /* SGN_CKSUM */
- k6_data, sizeof(k6_data));
- if (ret) {
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- {
- RC4_KEY rc4_key;
-
- RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
- RC4 (&rc4_key, 8, p0 + 8, SND_SEQ); /* SND_SEQ */
- memset(&rc4_key, 0, sizeof(rc4_key));
- memset(k6_data, 0, sizeof(k6_data));
- }
-
- _gsskrb5_decode_be_om_uint32(SND_SEQ, &seq_number);
-
- if (context_handle->more_flags & LOCAL)
- cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
- else
- cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
-
- if (cmp != 0) {
- *minor_status = 0;
- return GSS_S_BAD_MIC;
- }
-
- {
- int i;
-
- Klocal.keytype = key->keytype;
- Klocal.keyvalue.data = Klocaldata;
- Klocal.keyvalue.length = sizeof(Klocaldata);
-
- for (i = 0; i < 16; i++)
- Klocaldata[i] = ((u_char *)key->keyvalue.data)[i] ^ 0xF0;
- }
- ret = arcfour_mic_key(context, &Klocal,
- SND_SEQ, 4,
- k6_data, sizeof(k6_data));
- memset(Klocaldata, 0, sizeof(Klocaldata));
- if (ret) {
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- output_message_buffer->value = malloc(datalen);
- if (output_message_buffer->value == NULL) {
- *minor_status = ENOMEM;
- return GSS_S_FAILURE;
- }
- output_message_buffer->length = datalen;
-
- if(conf_flag) {
- RC4_KEY rc4_key;
-
- RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
- RC4 (&rc4_key, 8, p0 + 24, Confounder); /* Confounder */
- RC4 (&rc4_key, datalen, p0 + GSS_ARCFOUR_WRAP_TOKEN_SIZE,
- output_message_buffer->value);
- memset(&rc4_key, 0, sizeof(rc4_key));
- } else {
- memcpy(Confounder, p0 + 24, 8); /* Confounder */
- memcpy(output_message_buffer->value,
- p0 + GSS_ARCFOUR_WRAP_TOKEN_SIZE,
- datalen);
- }
- memset(k6_data, 0, sizeof(k6_data));
-
- if (!IS_DCE_STYLE(context_handle)) {
- ret = _gssapi_verify_pad(output_message_buffer, datalen, &padlen);
- if (ret) {
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- *minor_status = 0;
- return ret;
- }
- output_message_buffer->length -= padlen;
- }
-
- ret = arcfour_mic_cksum(context,
- key, KRB5_KU_USAGE_SEAL,
- cksum_data, sizeof(cksum_data),
- p0, 8,
- Confounder, sizeof(Confounder),
- output_message_buffer->value,
- output_message_buffer->length + padlen);
- if (ret) {
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- cmp = memcmp(cksum_data, p0 + 16, 8); /* SGN_CKSUM */
- if (cmp) {
- _gsskrb5_release_buffer(minor_status, output_message_buffer);
- *minor_status = 0;
- return GSS_S_BAD_MIC;
- }
-
- HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
- omret = _gssapi_msg_order_check(context_handle->order, seq_number);
- HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
- if (omret)
- return omret;
-
- if (conf_state)
- *conf_state = conf_flag;
-
- *minor_status = 0;
- return GSS_S_COMPLETE;
-}
-
-static OM_uint32
-max_wrap_length_arcfour(const gsskrb5_ctx ctx,
- krb5_crypto crypto,
- size_t input_length,
- OM_uint32 *max_input_size)
-{
- /*
- * if GSS_C_DCE_STYLE is in use:
- * - we only need to encapsulate the WRAP token
- * However, since this is a fixed since, we just
- */
- if (IS_DCE_STYLE(ctx)) {
- size_t len, total_len;
-
- len = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
- _gssapi_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
-
- if (input_length < len)
- *max_input_size = 0;
- else
- *max_input_size = input_length - len;
-
- } else {
- size_t extrasize = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
- size_t blocksize = 8;
- size_t len, total_len;
-
- len = 8 + input_length + blocksize + extrasize;
-
- _gsskrb5_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
-
- total_len -= input_length; /* token length */
- if (total_len < input_length) {
- *max_input_size = (input_length - total_len);
- (*max_input_size) &= (~(OM_uint32)(blocksize - 1));
- } else {
- *max_input_size = 0;
- }
- }
-
- return GSS_S_COMPLETE;
-}
-
-OM_uint32
-_gssapi_wrap_size_arcfour(OM_uint32 *minor_status,
- const gsskrb5_ctx ctx,
- krb5_context context,
- int conf_req_flag,
- gss_qop_t qop_req,
- OM_uint32 req_output_size,
- OM_uint32 *max_input_size,
- krb5_keyblock *key)
-{
- krb5_error_code ret;
- krb5_crypto crypto;
-
- ret = krb5_crypto_init(context, key, 0, &crypto);
- if (ret != 0) {
- *minor_status = ret;
- return GSS_S_FAILURE;
- }
-
- ret = max_wrap_length_arcfour(ctx, crypto,
- req_output_size, max_input_size);
- if (ret != 0) {
- *minor_status = ret;
- krb5_crypto_destroy(context, crypto);
- return GSS_S_FAILURE;
- }
-
- krb5_crypto_destroy(context, crypto);
-
- return GSS_S_COMPLETE;
-}
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