/*
* Read SSHFP parameters from key buffer.
*/
static int
dns_read_key(u_int8_t *algorithm, u_int8_t *digest_type,
u_char **digest, u_int *digest_len, const Key *key)
{
int success = 0;
switch (key->type) {
case KEY_RSA:
*algorithm = SSHFP_KEY_RSA;
break;
case KEY_DSA:
*algorithm = SSHFP_KEY_DSA;
break;
default:
*algorithm = SSHFP_KEY_RESERVED;
}
if (*algorithm) {
*digest_type = SSHFP_HASH_SHA1;
*digest = key_fingerprint_raw(key, SSH_FP_SHA1, digest_len);
success = 1;
} else {
*digest_type = SSHFP_HASH_RESERVED;
*digest = NULL;
*digest_len = 0;
success = 0;
}
return success;
}
/*
* Read SSHFP parameters from key buffer.
*/
static int
dns_read_key(u_int8_t *algorithm, u_int8_t *digest_type,
u_char **digest, u_int *digest_len, Key *key)
{
int success = 0;
switch (key->type) {
case KEY_RSA:
*algorithm = SSHFP_KEY_RSA;
break;
case KEY_DSA:
*algorithm = SSHFP_KEY_DSA;
break;
/* XXX KEY_ECDSA */
default:
*algorithm = SSHFP_KEY_RESERVED; /* 0 */
}
if (*algorithm) {
*digest_type = SSHFP_HASH_SHA1;
*digest = key_fingerprint_raw(key, SSH_FP_SHA1, digest_len);
if (*digest == NULL)
fatal("dns_read_key: null from key_fingerprint_raw()");
success = 1;
} else {
*digest_type = SSHFP_HASH_RESERVED;
*digest = NULL;
*digest_len = 0;
success = 0;
}
return success;
}
//
// fingerprint（指紋：ホスト公開鍵のハッシュ）を生成する
//
char *key_fingerprint(Key *key, enum fp_rep dgst_rep)
{
char *retval = NULL;
unsigned char *dgst_raw;
int dgst_raw_len;
int i, retval_len;
// fingerprintのハッシュ値（バイナリ）を求める
dgst_raw = key_fingerprint_raw(key, SSH_FP_MD5, &dgst_raw_len);
if (dgst_rep == SSH_FP_HEX) {
// 16進表記へ変換する
retval_len = dgst_raw_len * 3 + 1;
retval = malloc(retval_len);
retval[0] = '\0';
for (i = 0; i < dgst_raw_len; i++) {
char hex[4];
_snprintf_s(hex, sizeof(hex), _TRUNCATE, "%02x:", dgst_raw[i]);
strncat_s(retval, retval_len, hex, _TRUNCATE);
}
/* Remove the trailing ':' character */
retval[(dgst_raw_len * 3) - 1] = '\0';
} else if (dgst_rep == SSH_FP_RANDOMART) {
retval = key_fingerprint_randomart(dgst_raw, dgst_raw_len, key);
} else {
}
memset(dgst_raw, 0, dgst_raw_len);
free(dgst_raw);
return (retval);
}
