ima_api.c (bf61c8840efe60fd8f91446860b63338fb424158) ima_api.c (c7c8bb237fdbff932b5e431aebee5ce862ea07d1)
1/*
2 * Copyright (C) 2008 IBM Corporation
3 *
4 * Author: Mimi Zohar <zohar@us.ibm.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2 of the

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39 * Returns 0 on success, error code otherwise
40 */
41int ima_store_template(struct ima_template_entry *entry,
42 int violation, struct inode *inode)
43{
44 const char *op = "add_template_measure";
45 const char *audit_cause = "hashing_error";
46 int result;
1/*
2 * Copyright (C) 2008 IBM Corporation
3 *
4 * Author: Mimi Zohar <zohar@us.ibm.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2 of the

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39 * Returns 0 on success, error code otherwise
40 */
41int ima_store_template(struct ima_template_entry *entry,
42 int violation, struct inode *inode)
43{
44 const char *op = "add_template_measure";
45 const char *audit_cause = "hashing_error";
46 int result;
47 struct ima_digest_data hash;
47
48 memset(entry->digest, 0, sizeof(entry->digest));
49 entry->template_name = IMA_TEMPLATE_NAME;
50 entry->template_len = sizeof(entry->template);
51
52 if (!violation) {
53 result = ima_calc_buffer_hash(&entry->template,
48
49 memset(entry->digest, 0, sizeof(entry->digest));
50 entry->template_name = IMA_TEMPLATE_NAME;
51 entry->template_len = sizeof(entry->template);
52
53 if (!violation) {
54 result = ima_calc_buffer_hash(&entry->template,
54 entry->template_len,
55 entry->digest);
55 entry->template_len, &hash);
56 if (result < 0) {
57 integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
58 entry->template_name, op,
59 audit_cause, result, 0);
60 return result;
61 }
56 if (result < 0) {
57 integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
58 entry->template_name, op,
59 audit_cause, result, 0);
60 return result;
61 }
62 memcpy(entry->digest, hash.digest, hash.length);
62 }
63 result = ima_add_template_entry(entry, violation, op, inode);
64 return result;
65}
66
67/*
68 * ima_add_violation - add violation to measurement list.
69 *

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142{
143 struct inode *inode = file_inode(file);
144 const char *filename = file->f_dentry->d_name.name;
145 int result = 0;
146
147 if (!(iint->flags & IMA_COLLECTED)) {
148 u64 i_version = file_inode(file)->i_version;
149
63 }
64 result = ima_add_template_entry(entry, violation, op, inode);
65 return result;
66}
67
68/*
69 * ima_add_violation - add violation to measurement list.
70 *

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143{
144 struct inode *inode = file_inode(file);
145 const char *filename = file->f_dentry->d_name.name;
146 int result = 0;
147
148 if (!(iint->flags & IMA_COLLECTED)) {
149 u64 i_version = file_inode(file)->i_version;
150
150 iint->ima_xattr.type = IMA_XATTR_DIGEST;
151 result = ima_calc_file_hash(file, iint->ima_xattr.digest);
151 /* use default hash algorithm */
152 iint->ima_hash.algo = ima_hash_algo;
153 result = ima_calc_file_hash(file, &iint->ima_hash);
152 if (!result) {
153 iint->version = i_version;
154 iint->flags |= IMA_COLLECTED;
155 }
156 }
157 if (result)
158 integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
159 filename, "collect_data", "failed",

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191
192 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
193 if (!entry) {
194 integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
195 op, audit_cause, result, 0);
196 return;
197 }
198 memset(&entry->template, 0, sizeof(entry->template));
154 if (!result) {
155 iint->version = i_version;
156 iint->flags |= IMA_COLLECTED;
157 }
158 }
159 if (result)
160 integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
161 filename, "collect_data", "failed",

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193
194 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
195 if (!entry) {
196 integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
197 op, audit_cause, result, 0);
198 return;
199 }
200 memset(&entry->template, 0, sizeof(entry->template));
199 memcpy(entry->template.digest, iint->ima_xattr.digest, IMA_DIGEST_SIZE);
201 if (iint->ima_hash.algo != ima_hash_algo) {
202 struct ima_digest_data hash;
203
204 hash.algo = ima_hash_algo;
205 result = ima_calc_file_hash(file, &hash);
206 if (result)
207 integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
208 filename, "collect_data", "failed",
209 result, 0);
210 else
211 memcpy(entry->template.digest, hash.digest,
212 hash.length);
213 } else
214 memcpy(entry->template.digest, iint->ima_hash.digest,
215 iint->ima_hash.length);
200 strcpy(entry->template.file_name,
201 (strlen(filename) > IMA_EVENT_NAME_LEN_MAX) ?
202 file->f_dentry->d_name.name : filename);
203
204 result = ima_store_template(entry, violation, inode);
205 if (!result || result == -EEXIST)
206 iint->flags |= IMA_MEASURED;
207 if (result < 0)
208 kfree(entry);
209}
210
211void ima_audit_measurement(struct integrity_iint_cache *iint,
212 const unsigned char *filename)
213{
214 struct audit_buffer *ab;
216 strcpy(entry->template.file_name,
217 (strlen(filename) > IMA_EVENT_NAME_LEN_MAX) ?
218 file->f_dentry->d_name.name : filename);
219
220 result = ima_store_template(entry, violation, inode);
221 if (!result || result == -EEXIST)
222 iint->flags |= IMA_MEASURED;
223 if (result < 0)
224 kfree(entry);
225}
226
227void ima_audit_measurement(struct integrity_iint_cache *iint,
228 const unsigned char *filename)
229{
230 struct audit_buffer *ab;
215 char hash[(IMA_DIGEST_SIZE * 2) + 1];
231 char hash[(iint->ima_hash.length * 2) + 1];
216 int i;
217
218 if (iint->flags & IMA_AUDITED)
219 return;
220
232 int i;
233
234 if (iint->flags & IMA_AUDITED)
235 return;
236
221 for (i = 0; i < IMA_DIGEST_SIZE; i++)
222 hex_byte_pack(hash + (i * 2), iint->ima_xattr.digest[i]);
237 for (i = 0; i < iint->ima_hash.length; i++)
238 hex_byte_pack(hash + (i * 2), iint->ima_hash.digest[i]);
223 hash[i * 2] = '\0';
224
225 ab = audit_log_start(current->audit_context, GFP_KERNEL,
226 AUDIT_INTEGRITY_RULE);
227 if (!ab)
228 return;
229
230 audit_log_format(ab, "file=");

--- 26 unchanged lines hidden --- 		239 hash[i * 2] = '\0';
240
241 ab = audit_log_start(current->audit_context, GFP_KERNEL,
242 AUDIT_INTEGRITY_RULE);
243 if (!ab)
244 return;
245
246 audit_log_format(ab, "file=");

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