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perform uuid format checking and error handling

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Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
This commit is contained in:
Dmitry Kasatkin 2013-08-13 16:34:44 +03:00
parent b3a5fcbca2
commit 2406322914
1 changed files with 17 additions and 11 deletions
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28
src/evmctl.c
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@ -636,10 +636,16 @@ static int hex_to_bin(char ch)
return -1; return -1;
} }
static void pack_uuid(const char *uuid_str, char *to) static int pack_uuid(const char *uuid_str, char *uuid)
{ {
int i; int i;
char *to = uuid;
for (i = 0; i < 16; ++i) { for (i = 0; i < 16; ++i) {
if (!uuid_str[0] || !uuid_str[1]) {
log_err("wrong UUID format\n");
return -1;
}
*to++ = (hex_to_bin(*uuid_str) << 4) | *to++ = (hex_to_bin(*uuid_str) << 4) |
(hex_to_bin(*(uuid_str + 1))); (hex_to_bin(*(uuid_str + 1)));
uuid_str += 2; uuid_str += 2;
@ -648,10 +654,17 @@ static void pack_uuid(const char *uuid_str, char *to)
case 5: case 5:
case 7: case 7:
case 9: case 9:
if (*uuid_str != '-') {
log_err("wrong UUID format\n");
return -1;
}
uuid_str++; uuid_str++;
continue; continue;
} }
} }
log_info("uuid: ");
log_dump(uuid, 16);
return 0;
} }
static int get_uuid(struct stat *st, char *uuid) static int get_uuid(struct stat *st, char *uuid)
@ -662,10 +675,8 @@ static int get_uuid(struct stat *st, char *uuid)
FILE *fp; FILE *fp;
size_t len; size_t len;
if (uuid_str[0] != '-') { if (uuid_str[0] != '-')
pack_uuid(uuid_str, uuid); return pack_uuid(uuid_str, uuid);
return 0;
}
dev = st->st_dev; dev = st->st_dev;
major = (dev & 0xfff00) >> 8; major = (dev & 0xfff00) >> 8;
@ -687,12 +698,7 @@ static int get_uuid(struct stat *st, char *uuid)
return -1; return -1;
} }
pack_uuid(_uuid, uuid); return pack_uuid(_uuid, uuid);
log_info("uuid: ");
log_dump(uuid, 16);
return 0;
} }
static int calc_evm_hash(const char *file, unsigned char *hash) static int calc_evm_hash(const char *file, unsigned char *hash)