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client: add keygen command

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Add a new command that will generate a random key from /dev/urandom with
given ID, hash function and length.
This commit is contained in:
Miroslav Lichvar
2016-01-14 14:20:54 +01:00
parent 32ac6ffa26
commit 7fcf69ce5f
2 changed files with 66 additions and 0 deletions
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40
client.c
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@@ -1255,6 +1255,7 @@ give_help(void)
"dns -4|-6|-46\0Resolve hostnames only to IPv4/IPv6/both addresses\0"
"timeout <milliseconds>\0Set initial response timeout\0"
"retries <retries>\0Set maximum number of retries\0"
"keygen <id> [<type> [<bits>]]\0Generate key for key file\0"
"exit|quit\0Leave the program\0"
"help\0Generate this help\0"
"\0";
@@ -2413,6 +2414,42 @@ process_cmd_retries(const char *line)
/* ================================================== */
static int
process_cmd_keygen(char *line)
{
char hash_name[17];
unsigned char key[512];
unsigned int i, length, id, bits = 160;
#ifdef FEAT_SECHASH
snprintf(hash_name, sizeof (hash_name), "SHA1");
#else
snprintf(hash_name, sizeof (hash_name), "MD5");
#endif
if (sscanf(line, "%u %16s %d", &id, hash_name, &bits) < 1) {
LOG(LOGS_ERR, LOGF_Client, "Invalid syntax for keygen command");
return 0;
}
length = CLAMP(10, (bits + 7) / 8, sizeof (key));
if (HSH_GetHashId(hash_name) < 0) {
LOG(LOGS_ERR, LOGF_Client, "Unknown hash function %s", hash_name);
return 0;
}
UTI_GetRandomBytesUrandom(key, length);
printf("%u %s HEX:", id, hash_name);
for (i = 0; i < length; i++)
printf("%02hhX", key[i]);
printf("\n");
return 1;
}
/* ================================================== */
static int
process_line(char *line)
{
@@ -2499,6 +2536,9 @@ process_line(char *line)
do_normal_submit = 0;
give_help();
ret = 1;
} else if (!strcmp(command, "keygen")) {
ret = process_cmd_keygen(line);
do_normal_submit = 0;
} else if (!strcmp(command, "local")) {
do_normal_submit = process_cmd_local(&tx_message, line);
} else if (!strcmp(command, "makestep")) {