static int
dst_hmac_md5_generate_key(DST_KEY *key, const int nothing)
{
u_char *buff;
int n;
unsigned size, len;
if (key == NULL || key->dk_alg != KEY_HMAC_MD5)
return (0);
size = (key->dk_key_size + 7) / 8; /* convert to bytes */
if (size <= 0)
return(0);
len = size > 64 ? 64 : size;
buff = malloc(len+8);
n = dst_random(DST_RAND_SEMI, len, buff);
n += dst_random(DST_RAND_KEY, len, buff);
if (n <= len) { /* failed getting anything */
SAFE_FREE2(buff, len);
return (-1);
}
n = dst_buffer_to_hmac_md5(key, buff, len);
SAFE_FREE2(buff, len);
if (n <= 0)
return (n);
return (1);
}
static int
dst_hmac_md5_key_from_file_format(DST_KEY *dkey, const char *buff,
const int buff_len)
{
const char *p = buff, *eol;
u_char key[HMAC_LEN+1]; /* b64_pton needs more than 64 bytes do decode
* it should probably be fixed rather than doing
* this
*/
u_char *tmp;
int key_len, len;
if (dkey == NULL)
return (-2);
if (buff == NULL || buff_len < 0)
return (-1);
memset(key, 0, sizeof(key));
if (!dst_s_verify_str(&p, "Key: "))
return (-3);
eol = strchr(p, '\n');
if (eol == NULL)
return (-4);
len = eol - p;
tmp = malloc(len + 2);
if (tmp == NULL)
return (-5);
memcpy(tmp, p, len);
*(tmp + len) = 0x0;
key_len = b64_pton((char *)tmp, key, HMAC_LEN+1); /*%< see above */
SAFE_FREE2(tmp, len + 2);
if (dst_buffer_to_hmac_md5(dkey, key, key_len) < 0) {
return (-6);
}
return (0);
}
