dh/ima-evm-utils
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Make error and help messages more understandable

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Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
This commit is contained in:
Dmitry Kasatkin 2014-09-11 16:05:55 +03:00
parent 14a90aa87c
commit 47d3048ce1
2 changed files with 43 additions and 44 deletions
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75
src/evmctl.c
View File

@ -125,7 +125,7 @@ static int bin2file(const char *file, const char *ext, const unsigned char *data
fp = fopen(name, "w");
if (!fp) {
log_err("Unable to open %s for writing\n", name);
log_err("Failed to open: %s\n", name);
return -1;
}
err = fwrite(data, len, 1, fp);
@ -150,7 +150,7 @@ static unsigned char *file2bin(const char *file, const char *ext, int *size)
len = get_filesize(name);
fp = fopen(name, "r");
if (!fp) {
log_err("Unable to open %s\n", name);
log_err("Failed to open: %s\n", name);
return NULL;
}
data = malloc(len);
@ -270,19 +270,18 @@ static int get_uuid(struct stat *st, char *uuid)
sprintf(path, "blkid -s UUID -o value /dev/block/%u:%u", major, minor);
fp = popen(path, "r");
if (!fp) {
log_err("popen() failed\n");
return -1;
}
if (!fp)
goto err;
len = fread(_uuid, 1, sizeof(_uuid), fp);
pclose(fp);
if (len != sizeof(_uuid)) {
log_err("fread() failed\n");
return -1;
}
if (len != sizeof(_uuid))
goto err;
return pack_uuid(_uuid, uuid);
err:
log_err("Failed to read UUID. Root access might require.\n");
return -1;
}
static int calc_evm_hash(const char *file, unsigned char *hash)
@ -301,7 +300,7 @@ static int calc_evm_hash(const char *file, unsigned char *hash)
int hmac_size;
if (lstat(file, &st)) {
log_err("lstat() failed\n");
log_err("Failed to stat: %s\n", file);
return -1;
}
@ -311,7 +310,7 @@ static int calc_evm_hash(const char *file, unsigned char *hash)
int fd = open(file, 0);
if (fd < 0) {
log_err("Unable to open %s\n", file);
log_err("Failed to open: %s\n", file);
return -1;
}
if (ioctl(fd, FS_IOC_GETVERSION, &generation)) {
@ -553,7 +552,7 @@ static int get_file_type(const char *path, const char *search_type)
/* stay within the same filesystem*/
err = lstat(path, &st);
if (err < 0) {
log_err("stat() failed\n");
log_err("Failed to stat: %s\n", path);
return err;
}
fs_dev = st.st_dev; /* filesystem to start from */
@ -700,12 +699,12 @@ static int verify_evm(const char *file)
len = lgetxattr(file, "security.evm", sig, sizeof(sig));
if (len < 0) {
log_err("getxattr failed\n");
log_err("getxattr failed: %s\n", file);
return len;
}
if (sig[0] != 0x03) {
log_err("security.evm has not signature\n");
log_err("security.evm has no signature\n");
return -1;
}
@ -733,7 +732,7 @@ static int verify_ima(const char *file)
if (xattr) {
len = lgetxattr(file, "security.ima", sig, sizeof(sig));
if (len < 0) {
log_err("getxattr failed\n");
log_err("getxattr failed: %s\n", file);
return len;
}
}
@ -854,12 +853,12 @@ static int calc_evm_hmac(const char *file, const char *keyfile, unsigned char *h
key = file2bin(keyfile, NULL, &keylen);
if (!key) {
log_err("Unable to read a key: %s\n\n", keyfile);
log_err("Failed to read a key: %s\n", keyfile);
return -1;
}
if (keylen > sizeof(evmkey)) {
log_err("key is too long\n");
log_err("key is too long: %d\n", keylen);
goto out;
}
@ -868,7 +867,7 @@ static int calc_evm_hmac(const char *file, const char *keyfile, unsigned char *h
memset(evmkey + keylen, 0, sizeof(evmkey) - keylen);
if (lstat(file, &st)) {
log_err("lstat() failed\n");
log_err("Failed to stat: %s\n", file);
goto out;
}
@ -878,7 +877,7 @@ static int calc_evm_hmac(const char *file, const char *keyfile, unsigned char *h
int fd = open(file, 0);
if (fd < 0) {
log_err("Unable to open %s\n", file);
log_err("Failed to open %s\n", file);
goto out;
}
if (ioctl(fd, FS_IOC_GETVERSION, &generation)) {
@ -892,7 +891,7 @@ static int calc_evm_hmac(const char *file, const char *keyfile, unsigned char *h
list_size = llistxattr(file, list, sizeof(list));
if (list_size <= 0) {
log_err("llistxattr() failed\n");
log_err("llistxattr() failed: %s\n", file);
goto out;
}
@ -1038,7 +1037,7 @@ static int ima_fix(const char *path)
*/
size = llistxattr(path, list, sizeof(buf));
if (size < 0) {
log_errno("llistxattr() failed: %s\n", path);
log_errno("Failed to read xattrs (llistxattr): %s\n", path);
return -1;
}
for (; size > 0; len++, size -= len, list += len) {
@ -1054,7 +1053,7 @@ static int ima_fix(const char *path)
fd = open(path, O_RDONLY);
if (fd < 0) {
log_errno("%s open failed", path);
log_errno("Failed to open file: %s", path);
return -1;
}
@ -1073,7 +1072,7 @@ static int find(const char *path, int dts, find_cb_t func)
int err = lstat(path, &st);
if (err < 0) {
log_err("stat() failed\n");
log_err("Failed to stat: %s\n", path);
return err;
}
if (st.st_dev != fs_dev)
@ -1082,12 +1081,12 @@ static int find(const char *path, int dts, find_cb_t func)
dir = opendir(path);
if (!dir) {
log_err("Unable to open %s\n", path);
log_err("Failed to open directory %s\n", path);
return -1;
}
if (fchdir(dirfd(dir))) {
log_err("Unable to chdir %s\n", path);
log_err("Failed to chdir %s\n", path);
return -1;
}
@ -1102,7 +1101,7 @@ static int find(const char *path, int dts, find_cb_t func)
}
if (chdir("..")) {
log_err("Unable to chdir %s\n", path);
log_err("Failed to chdir: %s\n", path);
return -1;
}
@ -1305,7 +1304,7 @@ static int ima_measurement(const char *file)
fp = fopen(file, "rb");
if (!fp) {
log_err("Unable to open measurement file\n");
log_err("Failed to open measurement file: %s\n", file);
return -1;
}
@ -1448,20 +1447,20 @@ static void usage(void)
printf(
"\n"
" -a, --hashalgo sha1 (default), sha224, sha256, sha384, sha512\n"
" -s, --imasig also make IMA signature\n"
" -d, --imahash also make IMA hash\n"
" -s, --imasig make IMA signature\n"
" -d, --imahash make IMA hash\n"
" -f, --sigfile store IMA signature in .sig file instead of xattr\n"
" -1, --rsa signing key is in RSA DER format (signing v1)\n"
" -k, --key path to signing key (default keys are /etc/keys/{privkey,pubkey}_evm.pem)\n"
" --rsa use RSA key type and signing scheme v1\n"
" -k, --key path to signing key (default: /etc/keys/{privkey,pubkey}_evm.pem)\n"
" -p, --pass password for encrypted signing key\n"
" -u, --uuid use file system UUID in HMAC calculation (EVM v2)\n"
" -t, --type file types to fix 'fdsxm' (f - file, d - directory, s - block/char/symlink)\n"
" x - skip fixing if both ima and evm xattrs exist (caution: they may be wrong)\n"
" -r, --recursive recurse into directories (sign)\n"
" -t, --type file types to fix 'fdsxm' (f: file, d: directory, s: block/char/symlink)\n"
" x - skip fixing if both ima and evm xattrs exist (use with caution)\n"
" m - stay on the same filesystem (like 'find -xdev')\n"
" -n print result to stdout instead of setting xattr\n"
" -r, --recursive recurse into directories (sign)\n"
" --m32 force signature for 32 bit target system\n"
" --m64 force signature for 32 bit target system\n"
" -u, --uuid use custom FS UUID for EVM (unspecified: from FS, empty: do not use)\n"
" --m32 force EVM hmac/signature for 32 bit target system\n"
" --m64 force EVM hmac/signature for 64 bit target system\n"
" -v increase verbosity level\n"
" -h, --help display this help and exit\n"
"\n");

12
src/libimaevm.c
View File

@ -171,7 +171,7 @@ static int add_file_hash(const char *file, EVP_MD_CTX *ctx)
fp = fopen(file, "r");
if (!fp) {
log_err("Unable to open %s\n", file);
log_err("Failed to open: %s\n", file);
return -1;
}
@ -185,7 +185,7 @@ static int add_file_hash(const char *file, EVP_MD_CTX *ctx)
len = MIN(size, bs);
if (!fread(data, len, 1, fp)) {
if (ferror(fp)) {
log_err("fread() error\n\n");
log_err("fread() failed\n\n");
goto out;
}
break;
@ -214,7 +214,7 @@ static int add_dir_hash(const char *file, EVP_MD_CTX *ctx)
dir = opendir(file);
if (!dir) {
log_err("Unable to open %s\n", file);
log_err("Failed to open: %s\n", file);
return -1;
}
@ -273,7 +273,7 @@ int ima_calc_hash(const char *file, uint8_t *hash)
/* Need to know the file length */
err = lstat(file, &st);
if (err < 0) {
log_err("stat() failed\n");
log_err("Failed to stat: %s\n", file);
return err;
}
@ -329,7 +329,7 @@ RSA *read_pub_key(const char *keyfile, int x509)
fp = fopen(keyfile, "r");
if (!fp) {
log_err("Unable to open keyfile %s\n", keyfile);
log_err("Failed to open keyfile: %s\n", keyfile);
return NULL;
}
@ -615,7 +615,7 @@ static RSA *read_priv_key(const char *keyfile, char *keypass)
fp = fopen(keyfile, "r");
if (!fp) {
log_err("Unable to open keyfile %s\n", keyfile);
log_err("Failed to open keyfile: %s\n", keyfile);
return NULL;
}
key = PEM_read_RSAPrivateKey(fp, NULL, NULL, keypass);