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authorAlex Mayer <amayer5125@gmail.com>2019-04-01 12:02:30 -0400
committerMechMerlin <30334081+mechmerlin@users.noreply.github.com>2019-04-01 09:02:30 -0700
commit58b065cfdaca29144fa7fd18d482223bc1ea7308 (patch)
treecb5e86ecea13f767c236d10aab4e7ae5431dcc61 /lib/lufa/Projects/AVRISP-MKII/Config
parent3654d0f080c85da3b2ae33cc035777a445cca769 (diff)
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1UP Keyboards: Use Right Variant Of Keys On Right Side Of Board (#5529)
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generated by cgit v1.2.3 (git 2.25.1) at 2025-12-05 10:40:34 +0000
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/****************************************************************
 * acm_policy.c
 * 
 * Copyright (C) 2005 IBM Corporation
 *
 * Author:
 * Reiner Sailer <sailer@watson.ibm.com>
 *
 * Contributors:
 * Stefan Berger <stefanb@watson.ibm.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 *
 * sHype access control policy management for Xen.
 *       This interface allows policy tools in authorized
 *       domains to interact with the Xen access control module
 * 
 */

#include <xen/config.h>
#include <xen/errno.h>
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/delay.h>
#include <xen/sched.h>
#include <acm/acm_core.h>
#include <public/acm_ops.h>
#include <acm/acm_hooks.h>
#include <acm/acm_endian.h>

int
acm_set_policy(void *buf, u32 buf_size, int isuserbuffer)
{
    u8 *policy_buffer = NULL;
    struct acm_policy_buffer *pol;
 
    if (buf_size < sizeof(struct acm_policy_buffer))
        return -EFAULT;

    /* 1. copy buffer from domain */
    if ((policy_buffer = xmalloc_array(u8, buf_size)) == NULL)
        return -ENOMEM;

    if (isuserbuffer) {
        if (copy_from_user(policy_buffer, buf, buf_size))
        {
            printk("%s: Error copying!\n",__func__);
            goto error_free;
        }
    } else
        memcpy(policy_buffer, buf, buf_size);

    /* 2. some sanity checking */
    pol = (struct acm_policy_buffer *)policy_buffer;

    if ((ntohl(pol->magic) != ACM_MAGIC) ||
        (buf_size != ntohl(pol->len)) ||
        (ntohl(pol->policy_version) != ACM_POLICY_VERSION))
    {
        printk("%s: ERROR in Magic, Version, or buf size.\n", __func__);
        goto error_free;
    }

    if (acm_active_security_policy == ACM_POLICY_UNDEFINED) {
        /* setup the policy with the boot policy */
        if (acm_init_binary_policy((ntohl(pol->secondary_policy_code) << 4) |
                                   ntohl(pol->primary_policy_code))) {
            goto error_free;
        }
        acm_active_security_policy =
            (acm_bin_pol.secondary_policy_code << 4) | acm_bin_pol.primary_policy_code;
    }

    /* once acm_active_security_policy is set, it cannot be changed */
    if ((ntohl(pol->primary_policy_code) != acm_bin_pol.primary_policy_code) ||
        (ntohl(pol->secondary_policy_code) != acm_bin_pol.secondary_policy_code))
    {
        printkd("%s: Wrong policy type in boot policy!\n", __func__);
        goto error_free;
    }

    /* get bin_policy lock and rewrite policy (release old one) */
    write_lock(&acm_bin_pol_rwlock);

    /* 3. set label reference name */
    if (acm_set_policy_reference(buf + ntohl(pol->policy_reference_offset),
                                 ntohl(pol->primary_buffer_offset) -
                                 ntohl(pol->policy_reference_offset)))
        goto error_lock_free;

    /* 4. set primary policy data */
    if (acm_primary_ops->set_binary_policy(buf + ntohl(pol->primary_buffer_offset),
                                           ntohl(pol->secondary_buffer_offset) -
                                           ntohl(pol->primary_buffer_offset)))
        goto error_lock_free;

    /* 5. set secondary policy data */
    if (acm_secondary_ops->set_binary_policy(buf + ntohl(pol->secondary_buffer_offset),
                                             ntohl(pol->len) - 
                                             ntohl(pol->secondary_buffer_offset)))
        goto error_lock_free;

    write_unlock(&acm_bin_pol_rwlock);
    xfree(policy_buffer);
    return ACM_OK;

 error_lock_free:
    write_unlock(&acm_bin_pol_rwlock);
 error_free:
    printk("%s: Error setting policy.\n", __func__);
    xfree(policy_buffer);
    return -EFAULT;
}

int
acm_get_policy(void *buf, u32 buf_size)
{ 
    u8 *policy_buffer;
    int ret;
    struct acm_policy_buffer *bin_pol;
 
    if (buf_size < sizeof(struct acm_policy_buffer))
        return -EFAULT;

    if ((policy_buffer = xmalloc_array(u8, buf_size)) == NULL)
        return -ENOMEM;

    read_lock(&acm_bin_pol_rwlock);

    bin_pol = (struct acm_policy_buffer *)policy_buffer;
    bin_pol->magic = htonl(ACM_MAGIC);
    bin_pol->primary_policy_code = htonl(acm_bin_pol.primary_policy_code);
    bin_pol->secondary_policy_code = htonl(acm_bin_pol.secondary_policy_code);

    bin_pol->len = htonl(sizeof(struct acm_policy_buffer));
    bin_pol->policy_reference_offset = htonl(ntohl(bin_pol->len));
    bin_pol->primary_buffer_offset = htonl(ntohl(bin_pol->len));
    bin_pol->secondary_buffer_offset = htonl(ntohl(bin_pol->len));
     
    ret = acm_dump_policy_reference(policy_buffer + ntohl(bin_pol->policy_reference_offset),
                                    buf_size - ntohl(bin_pol->policy_reference_offset));
    if (ret < 0)
        goto error_free_unlock;

    bin_pol->len = htonl(ntohl(bin_pol->len) + ret);
    bin_pol->primary_buffer_offset = htonl(ntohl(bin_pol->len));

    ret = acm_primary_ops->dump_binary_policy (policy_buffer + ntohl(bin_pol->primary_buffer_offset),