/*
 * ecryptfs_format.c: helper functions for the encrypted key type
 *
 * Copyright (C) 2006 International Business Machines Corp.
 * Copyright (C) 2010 Politecnico di Torino, Italy
 *                    TORSEC group -- http://security.polito.it
 *
 * Authors:
 * Michael A. Halcrow <mahalcro@us.ibm.com>
 * Tyler Hicks <tyhicks@ou.edu>
 * Roberto Sassu <roberto.sassu@polito.it>
 *
 * 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.
 */

#include <linux/module.h>
#include "ecryptfs_format.h"

u8 *ecryptfs_get_auth_tok_key(struct ecryptfs_auth_tok *auth_tok)
{
	return auth_tok->token.password.session_key_encryption_key;
}
EXPORT_SYMBOL(ecryptfs_get_auth_tok_key);

/*
 * ecryptfs_get_versions()
 *
 * Source code taken from the software 'ecryptfs-utils' version 83.
 *
 */
void ecryptfs_get_versions(int *major, int *minor, int *file_version)
{
	*major = ECRYPTFS_VERSION_MAJOR;
	*minor = ECRYPTFS_VERSION_MINOR;
	if (file_version)
		*file_version = ECRYPTFS_SUPPORTED_FILE_VERSION;
}
EXPORT_SYMBOL(ecryptfs_get_versions);

/*
 * ecryptfs_fill_auth_tok - fill the ecryptfs_auth_tok structure
 *
 * Fill the ecryptfs_auth_tok structure with required ecryptfs data.
 * The source code is inspired to the original function generate_payload()
 * shipped with the software 'ecryptfs-utils' version 83.
 *
 */
int ecryptfs_fill_auth_tok(struct ecryptfs_auth_tok *auth_tok,
			   const char *key_desc)
{
	int major, minor;

	ecryptfs_get_versions(&major, &minor, NULL);
	auth_tok->version = (((uint16_t)(major << 8) & 0xFF00)
			     | ((uint16_t)minor & 0x00FF));
	auth_tok->token_type = ECRYPTFS_PASSWORD;
	strncpy((char *)auth_tok->token.password.signature, key_desc,
		ECRYPTFS_PASSWORD_SIG_SIZE);
	auth_tok->token.password.session_key_encryption_key_bytes =
		ECRYPTFS_MAX_KEY_BYTES;
	/*
	 * Removed auth_tok->token.password.salt and
	 * auth_tok->token.password.session_key_encryption_key
	 * initialization from the original code
	 */
	/* TODO: Make the hash parameterizable via policy */
	auth_tok->token.password.flags |=
		ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET;
	/* The kernel code will encrypt the session key. */
	auth_tok->session_key.encrypted_key[0] = 0;
	auth_tok->session_key.encrypted_key_size = 0;
	/* Default; subject to change by kernel eCryptfs */
	auth_tok->token.password.hash_algo = PGP_DIGEST_ALGO_SHA512;
	auth_tok->token.password.flags &= ~(ECRYPTFS_PERSISTENT_PASSWORD);
	return 0;
}
EXPORT_SYMBOL(ecryptfs_fill_auth_tok);

MODULE_LICENSE("GPL");
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>ipv4</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>tcp_metrics.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='5906374446386fd16fe562b042429d905d231ec3'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:41:46 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:41:46 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>5906374446386fd16fe562b042429d905d231ec3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipv4/tcp_metrics.c?id=5906374446386fd16fe562b042429d905d231ec3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>8e8a9f367d1aeba25c644d3fcf096ffc443c4c5a</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>net/ipv4/tcp_metrics.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=2fb78e89405f4321b86274a0c24b30896dd50529'>2fb78e89405f4321b86274a0c24b30896dd50529</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3&amp;id2=2fb78e89405f4321b86274a0c24b30896dd50529'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=57b59ed2e5b91e958843609c7884794e29e6c4cb'>57b59ed2e5b91e958843609c7884794e29e6c4cb</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/tcp_metrics.c?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3&amp;id2=57b59ed2e5b91e958843609c7884794e29e6c4cb'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs</div><div class='commit-msg'>Pull btrfs updates from Chris Mason:
 "Some fixes that we've collected from the list.

  We still have one more pending to nail down a regression in lzo
  compression, but I wanted to get this batch out the door"

* 'for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: remove -&gt;{get, set}_acl() from btrfs_dir_ro_inode_operations
  Btrfs: disable xattr operations on subvolume directories
  Btrfs: remove old tree_root case in btrfs_read_locked_inode()
  Btrfs: fix truncate down when no_holes feature is enabled
  Btrfs: Fix deadlock between direct IO and fast fsync
  btrfs: fix false enospc error when truncating heavily reflinked file
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>Diffstat</a> (limited to 'net/ipv4/tcp_metrics.c')</div><table summary='diffstat' class='diffstat'>