/*
* Processes input from the client and the program. Input data is stored
* in buffers and processed later.
*/
static void
process_input(struct ssh *ssh, fd_set *readset)
{
int len, r;
char buf[16384];
/* Read and buffer any input data from the client. */
if (FD_ISSET(connection_in, readset)) {
len = read(connection_in, buf, sizeof(buf));
if (len == 0) {
verbose("Connection closed by %.100s",
ssh_remote_ipaddr(ssh));
connection_closed = 1;
if (compat20)
return;
cleanup_exit(255);
} else if (len < 0) {
if (errno != EINTR && errno != EAGAIN) {
verbose("Read error from remote host "
"%.100s: %.100s",
ssh_remote_ipaddr(ssh), strerror(errno));
cleanup_exit(255);
}
} else {
/* Buffer any received data. */
ssh_packet_process_incoming(ssh, buf, len);
}
}
if (compat20)
return;
/* Read and buffer any available stdout data from the program. */
if (!fdout_eof && FD_ISSET(fdout, readset)) {
len = read(fdout, buf, sizeof(buf));
if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
/* do nothing */
} else if (len <= 0) {
fdout_eof = 1;
} else {
if ((r = sshbuf_put(stdout_buffer, buf, len)) != 0)
fatal("%s: buffer error: %s",
__func__, ssh_err(r));
fdout_bytes += len;
}
}
/* Read and buffer any available stderr data from the program. */
if (!fderr_eof && FD_ISSET(fderr, readset)) {
len = read(fderr, buf, sizeof(buf));
if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
/* do nothing */
} else if (len <= 0) {
fderr_eof = 1;
} else {
if ((r = sshbuf_put(stderr_buffer, buf, len)) != 0)
fatal("%s: buffer error: %s",
__func__, ssh_err(r));
}
}
}
int
kexgex_hash(
int hash_alg,
const char *client_version_string,
const char *server_version_string,
const u_char *ckexinit, size_t ckexinitlen,
const u_char *skexinit, size_t skexinitlen,
const u_char *serverhostkeyblob, size_t sbloblen,
int min, int wantbits, int max,
const BIGNUM *prime,
const BIGNUM *gen,
const BIGNUM *client_dh_pub,
const BIGNUM *server_dh_pub,
const BIGNUM *shared_secret,
u_char **hash, size_t *hashlen)
{
struct sshbuf *b;
static u_char digest[SSH_DIGEST_MAX_LENGTH];
int r;
if ((b = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 ||
(r = sshbuf_put_cstring(b, server_version_string)) != 0 ||
/* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
(r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 ||
(r = sshbuf_put_u32(b, skexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, skexinit, skexinitlen)) != 0 ||
(r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 ||
(min != -1 && (r = sshbuf_put_u32(b, min)) != 0) ||
(r = sshbuf_put_u32(b, wantbits)) != 0 ||
(max != -1 && (r = sshbuf_put_u32(b, max)) != 0) ||
(r = sshbuf_put_bignum2(b, prime)) != 0 ||
(r = sshbuf_put_bignum2(b, gen)) != 0 ||
(r = sshbuf_put_bignum2(b, client_dh_pub)) != 0 ||
(r = sshbuf_put_bignum2(b, server_dh_pub)) != 0 ||
(r = sshbuf_put_bignum2(b, shared_secret)) != 0) {
sshbuf_free(b);
return r;
}
#ifdef DEBUG_KEXDH
sshbuf_dump(b, stderr);
#endif
if (ssh_digest_buffer(hash_alg, b, digest, sizeof(digest)) != 0) {
sshbuf_free(b);
return SSH_ERR_LIBCRYPTO_ERROR;
}
sshbuf_free(b);
*hash = digest;
*hashlen = ssh_digest_bytes(hash_alg);
#ifdef DEBUG_KEXDH
dump_digest("hash", digest, *hashlen);
#endif
return 0;
}
int
kex_ecdh_hash(
const EVP_MD *evp_md,
const EC_GROUP *ec_group,
const char *client_version_string,
const char *server_version_string,
const u_char *ckexinit, size_t ckexinitlen,
const u_char *skexinit, size_t skexinitlen,
const u_char *serverhostkeyblob, size_t sbloblen,
const EC_POINT *client_dh_pub,
const EC_POINT *server_dh_pub,
const BIGNUM *shared_secret,
u_char **hash, size_t *hashlen)
{
struct sshbuf *b;
EVP_MD_CTX md;
static u_char digest[EVP_MAX_MD_SIZE];
int r;
if ((b = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 ||
(r = sshbuf_put_cstring(b, server_version_string)) != 0 ||
/* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
(r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 ||
(r = sshbuf_put_u32(b, skexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, skexinit, skexinitlen)) != 0 ||
(r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 ||
(r = sshbuf_put_ec(b, client_dh_pub, ec_group)) != 0 ||
(r = sshbuf_put_ec(b, server_dh_pub, ec_group)) != 0 ||
(r = sshbuf_put_bignum2(b, shared_secret)) != 0) {
sshbuf_free(b);
return r;
}
#ifdef DEBUG_KEX
sshbuf_dump(b, stderr);
#endif
if (EVP_DigestInit(&md, evp_md) != 1 ||
EVP_DigestUpdate(&md, sshbuf_ptr(b), sshbuf_len(b)) != 1 ||
EVP_DigestFinal(&md, digest, NULL) != 1) {
sshbuf_free(b);
return SSH_ERR_LIBCRYPTO_ERROR;
}
sshbuf_free(b);
#ifdef DEBUG_KEX
dump_digest("hash", digest, EVP_MD_size(evp_md));
#endif
*hash = digest;
*hashlen = EVP_MD_size(evp_md);
return 0;
}
int
kex_ecdh_hash(
int hash_alg,
const EC_GROUP *ec_group,
const char *client_version_string,
const char *server_version_string,
const u_char *ckexinit, size_t ckexinitlen,
const u_char *skexinit, size_t skexinitlen,
const u_char *serverhostkeyblob, size_t sbloblen,
const EC_POINT *client_dh_pub,
const EC_POINT *server_dh_pub,
const BIGNUM *shared_secret,
u_char *hash, size_t *hashlen)
{
struct sshbuf *b;
int r;
if (*hashlen < ssh_digest_bytes(hash_alg))
return SSH_ERR_INVALID_ARGUMENT;
if ((b = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 ||
(r = sshbuf_put_cstring(b, server_version_string)) != 0 ||
/* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */
(r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 ||
(r = sshbuf_put_u32(b, skexinitlen+1)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 ||
(r = sshbuf_put(b, skexinit, skexinitlen)) != 0 ||
(r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 ||
(r = sshbuf_put_ec(b, client_dh_pub, ec_group)) != 0 ||
(r = sshbuf_put_ec(b, server_dh_pub, ec_group)) != 0 ||
(r = sshbuf_put_bignum2(b, shared_secret)) != 0) {
sshbuf_free(b);
return r;
}
#ifdef DEBUG_KEX
sshbuf_dump(b, stderr);
#endif
if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) {
sshbuf_free(b);
return SSH_ERR_LIBCRYPTO_ERROR;
}
sshbuf_free(b);
*hashlen = ssh_digest_bytes(hash_alg);
#ifdef DEBUG_KEX
dump_digest("hash", hash, *hashlen);
#endif
return 0;
}
char *
ssh_gssapi_last_error(Gssctxt *ctxt, OM_uint32 *major_status,
OM_uint32 *minor_status)
{
OM_uint32 lmin;
gss_buffer_desc msg = GSS_C_EMPTY_BUFFER;
OM_uint32 ctx;
struct sshbuf *b;
char *ret;
int r;
if ((b = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
if (major_status != NULL)
*major_status = ctxt->major;
if (minor_status != NULL)
*minor_status = ctxt->minor;
ctx = 0;
/* The GSSAPI error */
do {
gss_display_status(&lmin, ctxt->major,
GSS_C_GSS_CODE, ctxt->oid, &ctx, &msg);
if ((r = sshbuf_put(b, msg.value, msg.length)) != 0 ||
(r = sshbuf_put_u8(b, '\n')) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
gss_release_buffer(&lmin, &msg);
} while (ctx != 0);
/* The mechanism specific error */
do {
gss_display_status(&lmin, ctxt->minor,
GSS_C_MECH_CODE, ctxt->oid, &ctx, &msg);
if ((r = sshbuf_put(b, msg.value, msg.length)) != 0 ||
(r = sshbuf_put_u8(b, '\n')) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
gss_release_buffer(&lmin, &msg);
} while (ctx != 0);
if ((r = sshbuf_put_u8(b, '\n')) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
ret = xstrdup((const char *)sshbuf_ptr(b));
sshbuf_free(b);
return (ret);
}
/*
* Caclulate a new key after a reconnect
*/
void
calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge)
{
int r;
const EVP_MD *md = EVP_sha1();
EVP_MD_CTX ctx;
char hash[EVP_MAX_MD_SIZE];
struct sshbuf *b;
if ((b = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
if ((r = sshbuf_put_u64(b, *key)) != 0 ||
(r = sshbuf_put_u64(b, cookie)) != 0 ||
(r = sshbuf_put_u64(b, challenge)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
EVP_DigestInit(&ctx, md);
EVP_DigestUpdate(&ctx, sshbuf_ptr(b), sshbuf_len(b));
EVP_DigestFinal(&ctx, hash, NULL);
sshbuf_reset(b);
if ((r = sshbuf_put(b, hash, EVP_MD_size(md))) != 0 ||
(r = sshbuf_get_u64(b, key)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
sshbuf_free(b);
}
int
kexc25519_shared_key_ext(const u_char key[CURVE25519_SIZE],
const u_char pub[CURVE25519_SIZE], struct sshbuf *out, int raw)
{
u_char shared_key[CURVE25519_SIZE];
u_char zero[CURVE25519_SIZE];
int r;
crypto_scalarmult_curve25519(shared_key, key, pub);
/* Check for all-zero shared secret */
explicit_bzero(zero, CURVE25519_SIZE);
if (timingsafe_bcmp(zero, shared_key, CURVE25519_SIZE) == 0)
return SSH_ERR_KEY_INVALID_EC_VALUE;
#ifdef DEBUG_KEXECDH
dump_digest("shared secret", shared_key, CURVE25519_SIZE);
#endif
if (raw)
r = sshbuf_put(out, shared_key, CURVE25519_SIZE);
else
r = sshbuf_put_bignum2_bytes(out, shared_key, CURVE25519_SIZE);
explicit_bzero(shared_key, CURVE25519_SIZE);
return r;
}
int
sshbuf_b64tod(struct sshbuf *buf, const char *b64)
{
size_t plen = strlen(b64);
int nlen, r;
u_char *p;
if (plen == 0)
return 0;
if ((p = malloc(plen)) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((nlen = b64_pton(b64, p, plen)) < 0) {
bzero(p, plen);
free(p);
return SSH_ERR_INVALID_FORMAT;
}
if ((r = sshbuf_put(buf, p, nlen)) < 0) {
bzero(p, plen);
free(p);
return r;
}
bzero(p, plen);
free(p);
return 0;
}
static int
recv_msg(struct sshbuf *m)
{
u_int l, len;
u_char c, buf[1024];
int r;
if ((len = atomicio(read, fd, buf, 4)) != 4) {
error("read from helper failed: %u", len);
return (0); /* XXX */
}
len = PEEK_U32(buf);
if (len > 256 * 1024)
fatal("response too long: %u", len);
/* read len bytes into m */
sshbuf_reset(m);
while (len > 0) {
l = len;
if (l > sizeof(buf))
l = sizeof(buf);
if (atomicio(read, fd, buf, l) != l) {
error("response from helper failed.");
return (0); /* XXX */
}
if ((r = sshbuf_put(m, buf, l)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
len -= l;
}
if ((r = sshbuf_get_u8(m, &c)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
return c;
}
void
buffer_append(Buffer *buffer, const void *data, u_int len)
{
int ret;
if ((ret = sshbuf_put(buffer, data, len)) != 0)
fatal("%s: %s", __func__, ssh_err(ret));
}
void
dump_digest(char *msg, u_char *digest, int len)
{
struct sshbuf *b;
fprintf(stderr, "%s\n", msg);
if ((b = sshbuf_new()) == NULL)
return;
if (sshbuf_put(b, digest, len) == 0)
sshbuf_dump(b, stderr);
sshbuf_free(b);
}
/* ARGSUSED */
int
kex_input_kexinit(int type, u_int32_t seq, void *ctxt)
{
struct ssh *ssh = ctxt;
struct kex *kex = ssh->kex;
const u_char *ptr;
u_int i;
size_t dlen;
int r;
debug("SSH2_MSG_KEXINIT received");
if (kex == NULL)
return SSH_ERR_INVALID_ARGUMENT;
ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL);
ptr = sshpkt_ptr(ssh, &dlen);
if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
return r;
/* discard packet */
for (i = 0; i < KEX_COOKIE_LEN; i++)
if ((r = sshpkt_get_u8(ssh, NULL)) != 0)
return r;
for (i = 0; i < PROPOSAL_MAX; i++)
if ((r = sshpkt_get_string(ssh, NULL, NULL)) != 0)
return r;
/*
* XXX RFC4253 sec 7: "each side MAY guess" - currently no supported
* KEX method has the server move first, but a server might be using
* a custom method or one that we otherwise don't support. We should
* be prepared to remember first_kex_follows here so we can eat a
* packet later.
* XXX2 - RFC4253 is kind of ambiguous on what first_kex_follows means
* for cases where the server *doesn't* go first. I guess we should
* ignore it when it is set for these cases, which is what we do now.
*/
if ((r = sshpkt_get_u8(ssh, NULL)) != 0 || /* first_kex_follows */
(r = sshpkt_get_u32(ssh, NULL)) != 0 || /* reserved */
(r = sshpkt_get_end(ssh)) != 0)
return r;
if (!(kex->flags & KEX_INIT_SENT))
if ((r = kex_send_kexinit(ssh)) != 0)
return r;
if ((r = kex_choose_conf(ssh)) != 0)
return r;
if (kex->kex_type < KEX_MAX && kex->kex[kex->kex_type] != NULL)
return (kex->kex[kex->kex_type])(ssh);
return SSH_ERR_INTERNAL_ERROR;
}
/* Load a key from a fd into a buffer */
int
sshkey_load_file(int fd, struct sshbuf *blob)
{
u_char buf[1024];
size_t len;
struct stat st;
int r, dontmax = 0;
if (fstat(fd, &st) < 0)
return SSH_ERR_SYSTEM_ERROR;
if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
st.st_size > MAX_KEY_FILE_SIZE)
return SSH_ERR_INVALID_FORMAT;
/*
* Pre-allocate the buffer used for the key contents and clamp its
* maximum size. This ensures that key contents are never leaked via
* implicit realloc() in the sshbuf code.
*/
if ((st.st_mode & S_IFREG) == 0 || st.st_size <= 0) {
st.st_size = 64*1024; /* 64k should be enough for anyone :) */
dontmax = 1;
}
if ((r = sshbuf_allocate(blob, st.st_size)) != 0 ||
(dontmax && (r = sshbuf_set_max_size(blob, st.st_size)) != 0))
return r;
for (;;) {
if ((len = atomicio(read, fd, buf, sizeof(buf))) == 0) {
if (errno == EPIPE)
break;
r = SSH_ERR_SYSTEM_ERROR;
goto out;
}
if ((r = sshbuf_put(blob, buf, len)) != 0)
goto out;
if (sshbuf_len(blob) > MAX_KEY_FILE_SIZE) {
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
}
if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
st.st_size != (off_t)sshbuf_len(blob)) {
r = SSH_ERR_FILE_CHANGED;
goto out;
}
r = 0;
out:
explicit_bzero(buf, sizeof(buf));
if (r != 0)
sshbuf_reset(blob);
return r;
}
/* convert SSH v2 key in OpenSSL PEM format */
static int
sshkey_private_pem_to_blob(struct sshkey *key, struct sshbuf *blob,
const char *_passphrase, const char *comment)
{
int success, r;
int blen, len = strlen(_passphrase);
u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL;
const u_char *bptr;
BIO *bio = NULL;
if (len > 0 && len <= 4)
return SSH_ERR_PASSPHRASE_TOO_SHORT;
if ((bio = BIO_new(BIO_s_mem())) == NULL)
return SSH_ERR_ALLOC_FAIL;
switch (key->type) {
case KEY_DSA:
success = PEM_write_bio_DSAPrivateKey(bio, key->dsa,
cipher, passphrase, len, NULL, NULL);
break;
case KEY_ECDSA:
success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa,
cipher, passphrase, len, NULL, NULL);
break;
case KEY_RSA:
success = PEM_write_bio_RSAPrivateKey(bio, key->rsa,
cipher, passphrase, len, NULL, NULL);
break;
default:
success = 0;
break;
}
if (success == 0) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) {
r = SSH_ERR_INTERNAL_ERROR;
goto out;
}
if ((r = sshbuf_put(blob, bptr, blen)) != 0)
goto out;
r = 0;
out:
BIO_free(bio);
return r;
}
static struct sshkey *
keygrab_ssh1(con *c)
{
static struct sshkey *rsa;
static struct sshbuf *msg;
int r;
u_char type;
if (rsa == NULL) {
if ((rsa = sshkey_new(KEY_RSA1)) == NULL) {
error("%s: sshkey_new failed", __func__);
return NULL;
}
if ((msg = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
}
if ((r = sshbuf_put(msg, c->c_data, c->c_plen)) != 0 ||
(r = sshbuf_consume(msg, 8 - (c->c_plen & 7))) != 0 || /* padding */
(r = sshbuf_get_u8(msg, &type)) != 0)
goto buf_err;
if (type != (int) SSH_SMSG_PUBLIC_KEY) {
error("%s: invalid packet type", c->c_name);
sshbuf_reset(msg);
return NULL;
}
if ((r = sshbuf_consume(msg, 8)) != 0 || /* cookie */
/* server key */
(r = sshbuf_get_u32(msg, NULL)) != 0 ||
(r = sshbuf_get_bignum1(msg, NULL)) != 0 ||
(r = sshbuf_get_bignum1(msg, NULL)) != 0 ||
/* host key */
(r = sshbuf_get_u32(msg, NULL)) != 0 ||
(r = sshbuf_get_bignum1(msg, rsa->rsa->e)) != 0 ||
(r = sshbuf_get_bignum1(msg, rsa->rsa->n)) != 0) {
buf_err:
error("%s: buffer error: %s", __func__, ssh_err(r));
sshbuf_reset(msg);
return NULL;
}
sshbuf_reset(msg);
return (rsa);
}
/* Communicate with agent: send request and read reply */
static int
ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply)
{
int r;
size_t l, len;
char buf[1024];
/* Get the length of the message, and format it in the buffer. */
len = sshbuf_len(request);
put_u32(buf, len);
/* Send the length and then the packet to the agent. */
if (atomicio(vwrite, sock, buf, 4) != 4 ||
atomicio(vwrite, sock, (u_char *)sshbuf_ptr(request),
sshbuf_len(request)) != sshbuf_len(request))
return SSH_ERR_AGENT_COMMUNICATION;
/*
* Wait for response from the agent. First read the length of the
* response packet.
*/
if (atomicio(read, sock, buf, 4) != 4)
return SSH_ERR_AGENT_COMMUNICATION;
/* Extract the length, and check it for sanity. */
len = get_u32(buf);
if (len > MAX_AGENT_REPLY_LEN)
return SSH_ERR_INVALID_FORMAT;
/* Read the rest of the response in to the buffer. */
sshbuf_reset(reply);
while (len > 0) {
l = len;
if (l > sizeof(buf))
l = sizeof(buf);
if (atomicio(read, sock, buf, l) != l)
return SSH_ERR_AGENT_COMMUNICATION;
if ((r = sshbuf_put(reply, buf, l)) != 0)
return r;
len -= l;
}
return 0;
}
/* ARGSUSED */
int
kex_input_kexinit(int type, u_int32_t seq, struct ssh *ssh)
{
Kex *kex = ssh->kex;
u_char *ptr;
u_int i;
size_t dlen;
int r;
debug("SSH2_MSG_KEXINIT received");
if (kex == NULL)
return SSH_ERR_INVALID_ARGUMENT;
ptr = sshpkt_ptr(ssh, &dlen);
if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
return r;
/* discard packet */
for (i = 0; i < KEX_COOKIE_LEN; i++)
if ((r = sshpkt_get_u8(ssh, NULL)) != 0)
return r;
for (i = 0; i < PROPOSAL_MAX; i++)
if ((r = sshpkt_get_string(ssh, NULL, NULL)) != 0)
return r;
if ((r = sshpkt_get_u8(ssh, NULL)) != 0 ||
(r = sshpkt_get_u32(ssh, NULL)) != 0 ||
(r = sshpkt_get_end(ssh)) != 0)
return r;
if (!(kex->flags & KEX_INIT_SENT))
if ((r = kex_send_kexinit(ssh)) != 0)
return r;
if ((r = kex_choose_conf(ssh)) != 0)
return r;
if (kex->kex_type >= 0 && kex->kex_type < KEX_MAX &&
kex->kex[kex->kex_type] != NULL)
return (kex->kex[kex->kex_type])(ssh);
return SSH_ERR_INTERNAL_ERROR;
}
/* Load a key from a fd into a buffer */
int
sshkey_load_file(int fd, struct sshbuf *blob)
{
u_char buf[1024];
size_t len;
struct stat st;
int r;
if (fstat(fd, &st) < 0)
return SSH_ERR_SYSTEM_ERROR;
if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
st.st_size > MAX_KEY_FILE_SIZE)
return SSH_ERR_INVALID_FORMAT;
for (;;) {
if ((len = atomicio(read, fd, buf, sizeof(buf))) == 0) {
if (errno == EPIPE)
break;
r = SSH_ERR_SYSTEM_ERROR;
goto out;
}
if ((r = sshbuf_put(blob, buf, len)) != 0)
goto out;
if (sshbuf_len(blob) > MAX_KEY_FILE_SIZE) {
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
}
if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
st.st_size != (off_t)sshbuf_len(blob)) {
r = SSH_ERR_FILE_CHANGED;
goto out;
}
r = 0;
out:
explicit_bzero(buf, sizeof(buf));
if (r != 0)
sshbuf_reset(blob);
return r;
}
static void
attempt_parse_blob(u_char *blob, size_t len)
{
struct sshbuf *p1;
BIGNUM *bn;
#ifdef OPENSSL_HAS_NISTP256
EC_KEY *eck;
#endif
u_char *s;
size_t l;
u_int8_t u8;
u_int16_t u16;
u_int32_t u32;
u_int64_t u64;
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put(p1, blob, len), 0);
sshbuf_get_u8(p1, &u8);
sshbuf_get_u16(p1, &u16);
sshbuf_get_u32(p1, &u32);
sshbuf_get_u64(p1, &u64);
if (sshbuf_get_string(p1, &s, &l) == 0) {
bzero(s, l);
free(s);
}
bn = BN_new();
sshbuf_get_bignum1(p1, bn);
BN_clear_free(bn);
bn = BN_new();
sshbuf_get_bignum2(p1, bn);
BN_clear_free(bn);
#ifdef OPENSSL_HAS_NISTP256
eck = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
ASSERT_PTR_NE(eck, NULL);
sshbuf_get_eckey(p1, eck);
EC_KEY_free(eck);
#endif
sshbuf_free(p1);
}
int
ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge,
u_char session_id[16], u_char response[16])
{
struct sshbuf *msg;
int r;
u_char type;
if (key->type != KEY_RSA1)
return SSH_ERR_INVALID_ARGUMENT;
if ((msg = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((r = sshbuf_put_u8(msg, SSH_AGENTC_RSA_CHALLENGE)) != 0 ||
(r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 ||
(r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 ||
(r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0 ||
(r = sshbuf_put_bignum1(msg, challenge)) != 0 ||
(r = sshbuf_put(msg, session_id, 16)) != 0 ||
(r = sshbuf_put_u32(msg, 1)) != 0) /* Response type for proto 1.1 */
goto out;
if ((r = ssh_request_reply(sock, msg, msg)) != 0)
goto out;
if ((r = sshbuf_get_u8(msg, &type)) != 0)
goto out;
if (agent_failed(type)) {
r = SSH_ERR_AGENT_FAILURE;
goto out;
} else if (type != SSH_AGENT_RSA_RESPONSE) {
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
if ((r = sshbuf_get(msg, response, 16)) != 0)
goto out;
r = 0;
out:
sshbuf_free(msg);
return r;
}
/*
* Caclulate a new key after a reconnect
*/
void
calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge)
{
u_char hash[SSH_DIGEST_MAX_LENGTH];
struct sshbuf *b;
int r;
if ((b = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
if ((r = sshbuf_put_u64(b, *key)) != 0 ||
(r = sshbuf_put_u64(b, cookie)) != 0 ||
(r = sshbuf_put_u64(b, challenge)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
if (ssh_digest_buffer(SSH_DIGEST_SHA1, b, hash, sizeof(hash)) != 0)
fatal("%s: digest_buffer failed", __func__);
sshbuf_reset(b);
if ((r = sshbuf_put(b, hash, ssh_digest_bytes(SSH_DIGEST_SHA1))) != 0 ||
(r = sshbuf_get_u64(b, key)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
sshbuf_free(b);
}
static int
server_input_stdin_data(int type, u_int32_t seq, struct ssh *ssh)
{
u_char *data = NULL;
size_t data_len;
int r;
/* Stdin data from the client. Append it to the buffer. */
/* Ignore any data if the client has closed stdin. */
if (fdin == -1)
return 0;
if ((r = sshpkt_get_string(ssh, &data, &data_len)) != 0 ||
(r = sshpkt_get_end(ssh)) != 0 ||
(r = sshbuf_put(stdin_buffer, data, data_len)) != 0)
goto out;
r = 0;
out:
if (data) {
explicit_bzero(data, data_len);
free(data);
}
return r;
}
int
sshbuf_putb(struct sshbuf *buf, const struct sshbuf *v)
{
return sshbuf_put(buf, sshbuf_ptr(v), sshbuf_len(v));
}
static int
derive_key(struct ssh *ssh, int id, u_int need, u_char *hash, u_int hashlen,
const u_char *shared_secret, u_int slen, u_char **keyp)
{
struct kex *kex = ssh->kex;
struct sshbuf *b = NULL;
struct ssh_digest_ctx *hashctx = NULL;
char c = id;
u_int have;
size_t mdsz;
u_char *digest;
int r;
if ((mdsz = ssh_digest_bytes(kex->hash_alg)) == 0)
return SSH_ERR_INVALID_ARGUMENT;
if ((digest = calloc(1, roundup(need, mdsz))) == NULL ||
(b = sshbuf_new()) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
if ((r = sshbuf_put(b, shared_secret, slen)) < 0)
goto out;
/* K1 = HASH(K || H || "A" || session_id) */
if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL ||
ssh_digest_update_buffer(hashctx, b) != 0 ||
ssh_digest_update(hashctx, hash, hashlen) != 0 ||
ssh_digest_update(hashctx, &c, 1) != 0 ||
ssh_digest_update(hashctx, kex->session_id,
kex->session_id_len) != 0 ||
ssh_digest_final(hashctx, digest, mdsz) != 0) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
ssh_digest_free(hashctx);
hashctx = NULL;
/*
* expand key:
* Kn = HASH(K || H || K1 || K2 || ... || Kn-1)
* Key = K1 || K2 || ... || Kn
*/
for (have = mdsz; need > have; have += mdsz) {
if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL ||
ssh_digest_update_buffer(hashctx, b) != 0 ||
ssh_digest_update(hashctx, hash, hashlen) != 0 ||
ssh_digest_update(hashctx, digest, have) != 0 ||
ssh_digest_final(hashctx, digest + have, mdsz) != 0) {
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
ssh_digest_free(hashctx);
hashctx = NULL;
}
#ifdef DEBUG_KEX
fprintf(stderr, "key '%c'== ", c);
dump_digest("key", digest, need);
#endif
*keyp = digest;
digest = NULL;
r = 0;
out:
if (digest)
free(digest);
if (b)
sshbuf_free(b);
ssh_digest_free(hashctx);
return r;
}
void
sshbuf_getput_crypto_tests(void)
{
struct sshbuf *p1;
const u_char *d;
size_t s;
BIGNUM *bn, *bn2, *bn_x, *bn_y;
/* This one has num_bits != num_bytes * 8 to test bignum1 encoding */
const char *hexbn1 = "0102030405060708090a0b0c0d0e0f10";
/* This one has MSB set to test bignum2 encoding negative-avoidance */
const char *hexbn2 = "f0e0d0c0b0a0908070605040302010007fff11";
u_char expbn1[] = {
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
};
u_char expbn2[] = {
0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
0x7f, 0xff, 0x11
};
int ec256_nid = NID_X9_62_prime256v1;
char *ec256_x = "0C828004839D0106AA59575216191357"
"34B451459DADB586677EF9DF55784999";
char *ec256_y = "4D196B50F0B4E94B3C73E3A9D4CD9DF2"
"C8F9A35E42BDD047550F69D80EC23CD4";
u_char expec256[] = {
0x04,
0x0c, 0x82, 0x80, 0x04, 0x83, 0x9d, 0x01, 0x06,
0xaa, 0x59, 0x57, 0x52, 0x16, 0x19, 0x13, 0x57,
0x34, 0xb4, 0x51, 0x45, 0x9d, 0xad, 0xb5, 0x86,
0x67, 0x7e, 0xf9, 0xdf, 0x55, 0x78, 0x49, 0x99,
0x4d, 0x19, 0x6b, 0x50, 0xf0, 0xb4, 0xe9, 0x4b,
0x3c, 0x73, 0xe3, 0xa9, 0xd4, 0xcd, 0x9d, 0xf2,
0xc8, 0xf9, 0xa3, 0x5e, 0x42, 0xbd, 0xd0, 0x47,
0x55, 0x0f, 0x69, 0xd8, 0x0e, 0xc2, 0x3c, 0xd4
};
EC_KEY *eck;
EC_POINT *ecp;
int r;
#define MKBN(b, bnn) \
do { \
bnn = NULL; \
ASSERT_INT_GT(BN_hex2bn(&bnn, b), 0); \
} while (0)
TEST_START("sshbuf_put_bignum1");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_bignum1(p1, bn), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn1) + 2);
ASSERT_U16_EQ(PEEK_U16(sshbuf_ptr(p1)), (u_int16_t)BN_num_bits(bn));
ASSERT_MEM_EQ(sshbuf_ptr(p1) + 2, expbn1, sizeof(expbn1));
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum1 limited");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn1) + 1), 0);
r = sshbuf_put_bignum1(p1, bn);
ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0);
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum1 bn2");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_bignum1(p1, bn), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 2);
ASSERT_U16_EQ(PEEK_U16(sshbuf_ptr(p1)), (u_int16_t)BN_num_bits(bn));
ASSERT_MEM_EQ(sshbuf_ptr(p1) + 2, expbn2, sizeof(expbn2));
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum1 bn2 limited");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn1) + 1), 0);
r = sshbuf_put_bignum1(p1, bn);
ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0);
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum2");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_bignum2(p1, bn), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn1) + 4);
ASSERT_U32_EQ(PEEK_U32(sshbuf_ptr(p1)), (u_int32_t)BN_num_bytes(bn));
ASSERT_MEM_EQ(sshbuf_ptr(p1) + 4, expbn1, sizeof(expbn1));
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum2 limited");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn1) + 3), 0);
r = sshbuf_put_bignum2(p1, bn);
ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0);
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum2 bn2");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_bignum2(p1, bn), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 4 + 1); /* MSB */
ASSERT_U32_EQ(PEEK_U32(sshbuf_ptr(p1)), (u_int32_t)BN_num_bytes(bn) + 1);
ASSERT_U8_EQ(*(sshbuf_ptr(p1) + 4), 0x00);
ASSERT_MEM_EQ(sshbuf_ptr(p1) + 5, expbn2, sizeof(expbn2));
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_bignum2 bn2 limited");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn2) + 3), 0);
r = sshbuf_put_bignum2(p1, bn);
ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0);
BN_free(bn);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum1");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u16(p1, BN_num_bits(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1)), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn1));
ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0);
bn2 = BN_new();
ASSERT_INT_EQ(sshbuf_get_bignum1(p1, bn2), 0);
ASSERT_BIGNUM_EQ(bn, bn2);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum1 truncated");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u16(p1, BN_num_bits(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1) - 1), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn1) - 1);
bn2 = BN_new();
r = sshbuf_get_bignum1(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn1) - 1);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum1 giant");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xffff), 0);
ASSERT_INT_EQ(sshbuf_reserve(p1, (0xffff + 7) / 8, NULL), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + ((0xffff + 7) / 8));
bn2 = BN_new();
r = sshbuf_get_bignum1(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_BIGNUM_TOO_LARGE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + ((0xffff + 7) / 8));
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum1 bn2");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u16(p1, BN_num_bits(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2)), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn2));
ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0);
bn2 = BN_new();
ASSERT_INT_EQ(sshbuf_get_bignum1(p1, bn2), 0);
ASSERT_BIGNUM_EQ(bn, bn2);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum1 bn2 truncated");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u16(p1, BN_num_bits(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2) - 1), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn2) - 1);
bn2 = BN_new();
r = sshbuf_get_bignum1(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2 + sizeof(expbn2) - 1);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1)), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 4 + sizeof(expbn1));
ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0);
bn2 = BN_new();
ASSERT_INT_EQ(sshbuf_get_bignum2(p1, bn2), 0);
ASSERT_BIGNUM_EQ(bn, bn2);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2 truncated");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1) - 1), 0);
bn2 = BN_new();
r = sshbuf_get_bignum2(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn1) + 3);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2 giant");
MKBN(hexbn1, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, 65536), 0);
ASSERT_INT_EQ(sshbuf_reserve(p1, 65536, NULL), 0);
bn2 = BN_new();
r = sshbuf_get_bignum2(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_BIGNUM_TOO_LARGE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 65536 + 4);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2 bn2");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn) + 1), 0); /* MSB */
ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2)), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 4 + 1 + sizeof(expbn2));
ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0);
bn2 = BN_new();
ASSERT_INT_EQ(sshbuf_get_bignum2(p1, bn2), 0);
ASSERT_BIGNUM_EQ(bn, bn2);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2 bn2 truncated");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn) + 1), 0);
ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2) - 1), 0);
bn2 = BN_new();
r = sshbuf_get_bignum2(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 1 + 4 - 1);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_get_bignum2 bn2 negative");
MKBN(hexbn2, bn);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0);
ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2)), 0);
bn2 = BN_new();
r = sshbuf_get_bignum2(p1, bn2);
ASSERT_INT_EQ(r, SSH_ERR_BIGNUM_IS_NEGATIVE);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 4);
BN_free(bn);
BN_free(bn2);
sshbuf_free(p1);
TEST_DONE();
TEST_START("sshbuf_put_ec");
eck = EC_KEY_new_by_curve_name(ec256_nid);
ASSERT_PTR_NE(eck, NULL);
ecp = EC_POINT_new(EC_KEY_get0_group(eck));
ASSERT_PTR_NE(ecp, NULL);
MKBN(ec256_x, bn_x);
MKBN(ec256_y, bn_y);
ASSERT_INT_EQ(EC_POINT_set_affine_coordinates_GFp(
EC_KEY_get0_group(eck), ecp, bn_x, bn_y, NULL), 1);
ASSERT_INT_EQ(EC_KEY_set_public_key(eck, ecp), 1);
EC_POINT_free(ecp);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_eckey(p1, eck), 0);
ASSERT_INT_EQ(sshbuf_get_string_direct(p1, &d, &s), 0);
ASSERT_SIZE_T_EQ(s, sizeof(expec256));
ASSERT_MEM_EQ(d, expec256, sizeof(expec256));
sshbuf_free(p1);
EC_KEY_free(eck);
TEST_DONE();
TEST_START("sshbuf_get_ec");
eck = EC_KEY_new_by_curve_name(ec256_nid);
ASSERT_PTR_NE(eck, NULL);
p1 = sshbuf_new();
ASSERT_PTR_NE(p1, NULL);
ASSERT_INT_EQ(sshbuf_put_string(p1, expec256, sizeof(expec256)), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expec256) + 4);
ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0);
ASSERT_INT_EQ(sshbuf_get_eckey(p1, eck), 0);
bn_x = BN_new();
bn_y = BN_new();
ASSERT_PTR_NE(bn_x, NULL);
ASSERT_PTR_NE(bn_y, NULL);
ASSERT_INT_EQ(EC_POINT_get_affine_coordinates_GFp(
EC_KEY_get0_group(eck), EC_KEY_get0_public_key(eck),
bn_x, bn_y, NULL), 1);
MKBN(ec256_x, bn);
MKBN(ec256_y, bn2);
ASSERT_INT_EQ(BN_cmp(bn_x, bn), 0);
ASSERT_INT_EQ(BN_cmp(bn_y, bn2), 0);
ASSERT_SIZE_T_EQ(sshbuf_len(p1), 1);
sshbuf_free(p1);
EC_KEY_free(eck);
BN_free(bn_x);
BN_free(bn_y);
BN_free(bn);
BN_free(bn2);
TEST_DONE();
}
int
ssh_dss_verify(const struct sshkey *key,
const u_char *signature, u_int signaturelen,
const u_char *data, u_int datalen, u_int compat)
{
DSA_SIG *sig = NULL;
const EVP_MD *evp_md = EVP_sha1();
EVP_MD_CTX md;
u_char digest[EVP_MAX_MD_SIZE], *sigblob = NULL;
size_t len;
u_int dlen;
int ret = SSH_ERR_INTERNAL_ERROR;
struct sshbuf *b = NULL;
char *ktype = NULL;
if (key == NULL || key->dsa == NULL || (key->type != KEY_DSA &&
key->type != KEY_DSA_CERT && key->type != KEY_DSA_CERT_V00))
return SSH_ERR_INVALID_ARGUMENT;
/* fetch signature */
if (compat & SSH_BUG_SIGBLOB) {
if ((sigblob = malloc(signaturelen)) == NULL)
return SSH_ERR_ALLOC_FAIL;
memcpy(sigblob, signature, signaturelen);
len = signaturelen;
} else {
/* ietf-drafts */
if ((b = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
if ((ret = sshbuf_put(b, signature, signaturelen)) != 0)
goto out;
if (sshbuf_get_cstring(b, &ktype, NULL) != 0 ||
sshbuf_get_string(b, &sigblob, &len) != 0) {
ret = SSH_ERR_INVALID_FORMAT;
goto out;
}
if (strcmp("ssh-dss", ktype) != 0) {
ret = SSH_ERR_KEY_TYPE_MISMATCH;
goto out;
}
if (sshbuf_len(b) != 0) {
ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
goto out;
}
}
if (len != SIGBLOB_LEN) {
ret = SSH_ERR_INVALID_FORMAT;
goto out;
}
/* parse signature */
if ((sig = DSA_SIG_new()) == NULL ||
(sig->r = BN_new()) == NULL ||
(sig->s = BN_new()) == NULL) {
ret = SSH_ERR_ALLOC_FAIL;
goto out;
}
if ((BN_bin2bn(sigblob, INTBLOB_LEN, sig->r) == NULL) ||
(BN_bin2bn(sigblob+ INTBLOB_LEN, INTBLOB_LEN, sig->s) == NULL)) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
/* sha1 the data */
if (EVP_DigestInit(&md, evp_md) != 1 ||
EVP_DigestUpdate(&md, data, datalen) != 1 ||
EVP_DigestFinal(&md, digest, &dlen) != 1) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
switch (DSA_do_verify(digest, dlen, sig, key->dsa)) {
case 1:
ret = 0;
break;
case 0:
ret = SSH_ERR_SIGNATURE_INVALID;
goto out;
default:
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
out:
bzero(digest, sizeof(digest));
bzero(&md, sizeof(md));
if (sig != NULL)
DSA_SIG_free(sig);
if (b != NULL)
sshbuf_free(b);
if (ktype != NULL)
free(ktype);
if (sigblob != NULL) {
memset(sigblob, 0, len);
free(sigblob);
}
return ret;
}
int
sftp_server_main(int argc, char **argv, struct passwd *user_pw)
{
fd_set *rset, *wset;
int i, r, in, out, max, ch, skipargs = 0, log_stderr = 0;
ssize_t len, olen, set_size;
SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
char *cp, *homedir = NULL, buf[4*4096];
long mask;
extern char *optarg;
extern char *__progname;
ssh_malloc_init(); /* must be called before any mallocs */
__progname = ssh_get_progname(argv[0]);
log_init(__progname, log_level, log_facility, log_stderr);
pw = pwcopy(user_pw);
while (!skipargs && (ch = getopt(argc, argv,
"d:f:l:P:p:Q:u:cehR")) != -1) {
switch (ch) {
case 'Q':
if (strcasecmp(optarg, "requests") != 0) {
fprintf(stderr, "Invalid query type\n");
exit(1);
}
for (i = 0; handlers[i].handler != NULL; i++)
printf("%s\n", handlers[i].name);
for (i = 0; extended_handlers[i].handler != NULL; i++)
printf("%s\n", extended_handlers[i].name);
exit(0);
break;
case 'R':
readonly = 1;
break;
case 'c':
/*
* Ignore all arguments if we are invoked as a
* shell using "sftp-server -c command"
*/
skipargs = 1;
break;
case 'e':
log_stderr = 1;
break;
case 'l':
log_level = log_level_number(optarg);
if (log_level == SYSLOG_LEVEL_NOT_SET)
error("Invalid log level \"%s\"", optarg);
break;
case 'f':
log_facility = log_facility_number(optarg);
if (log_facility == SYSLOG_FACILITY_NOT_SET)
error("Invalid log facility \"%s\"", optarg);
break;
case 'd':
cp = tilde_expand_filename(optarg, user_pw->pw_uid);
homedir = percent_expand(cp, "d", user_pw->pw_dir,
"u", user_pw->pw_name, (char *)NULL);
free(cp);
break;
case 'p':
if (request_whitelist != NULL)
fatal("Permitted requests already set");
request_whitelist = xstrdup(optarg);
break;
case 'P':
if (request_blacklist != NULL)
fatal("Refused requests already set");
request_blacklist = xstrdup(optarg);
break;
case 'u':
errno = 0;
mask = strtol(optarg, &cp, 8);
if (mask < 0 || mask > 0777 || *cp != '\0' ||
cp == optarg || (mask == 0 && errno != 0))
fatal("Invalid umask \"%s\"", optarg);
(void)umask((mode_t)mask);
break;
case 'h':
default:
sftp_server_usage();
}
}
log_init(__progname, log_level, log_facility, log_stderr);
#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
/*
* On Linux, we should try to avoid making /proc/self/{mem,maps}
* available to the user so that sftp access doesn't automatically
* imply arbitrary code execution access that will break
* restricted configurations.
*/
if (prctl(PR_SET_DUMPABLE, 0) != 0)
fatal("unable to make the process undumpable");
#endif /* defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) */
/* Drop any fine-grained privileges we don't need */
platform_pledge_sftp_server();
if ((cp = getenv("SSH_CONNECTION")) != NULL) {
client_addr = xstrdup(cp);
if ((cp = strchr(client_addr, ' ')) == NULL) {
error("Malformed SSH_CONNECTION variable: \"%s\"",
getenv("SSH_CONNECTION"));
sftp_server_cleanup_exit(255);
}
*cp = '\0';
} else
client_addr = xstrdup("UNKNOWN");
logit("session opened for local user %s from [%s]",
pw->pw_name, client_addr);
in = STDIN_FILENO;
out = STDOUT_FILENO;
#ifdef HAVE_CYGWIN
setmode(in, O_BINARY);
setmode(out, O_BINARY);
#endif
max = 0;
if (in > max)
max = in;
if (out > max)
max = out;
if ((iqueue = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
if ((oqueue = sshbuf_new()) == NULL)
fatal("%s: sshbuf_new failed", __func__);
rset = xcalloc(howmany(max + 1, NFDBITS), sizeof(fd_mask));
wset = xcalloc(howmany(max + 1, NFDBITS), sizeof(fd_mask));
if (homedir != NULL) {
if (chdir(homedir) != 0) {
error("chdir to \"%s\" failed: %s", homedir,
strerror(errno));
}
}
set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask);
for (;;) {
memset(rset, 0, set_size);
memset(wset, 0, set_size);
/*
* Ensure that we can read a full buffer and handle
* the worst-case length packet it can generate,
* otherwise apply backpressure by stopping reads.
*/
if ((r = sshbuf_check_reserve(iqueue, sizeof(buf))) == 0 &&
(r = sshbuf_check_reserve(oqueue,
SFTP_MAX_MSG_LENGTH)) == 0)
FD_SET(in, rset);
else if (r != SSH_ERR_NO_BUFFER_SPACE)
fatal("%s: sshbuf_check_reserve failed: %s",
__func__, ssh_err(r));
olen = sshbuf_len(oqueue);
if (olen > 0)
FD_SET(out, wset);
if (select(max+1, rset, wset, NULL, NULL) < 0) {
if (errno == EINTR)
continue;
error("select: %s", strerror(errno));
sftp_server_cleanup_exit(2);
}
/* copy stdin to iqueue */
if (FD_ISSET(in, rset)) {
len = read(in, buf, sizeof buf);
if (len == 0) {
debug("read eof");
sftp_server_cleanup_exit(0);
} else if (len < 0) {
error("read: %s", strerror(errno));
sftp_server_cleanup_exit(1);
} else if ((r = sshbuf_put(iqueue, buf, len)) != 0) {
fatal("%s: buffer error: %s",
__func__, ssh_err(r));
}
}
/* send oqueue to stdout */
if (FD_ISSET(out, wset)) {
len = write(out, sshbuf_ptr(oqueue), olen);
if (len < 0) {
error("write: %s", strerror(errno));
sftp_server_cleanup_exit(1);
} else if ((r = sshbuf_consume(oqueue, len)) != 0) {
fatal("%s: buffer error: %s",
__func__, ssh_err(r));
}
}
/*
* Process requests from client if we can fit the results
* into the output buffer, otherwise stop processing input
* and let the output queue drain.
*/
r = sshbuf_check_reserve(oqueue, SFTP_MAX_MSG_LENGTH);
if (r == 0)
process();
else if (r != SSH_ERR_NO_BUFFER_SPACE)
fatal("%s: sshbuf_check_reserve: %s",
__func__, ssh_err(r));
}
}
void
userauth_finish(struct ssh *ssh, int authenticated, const char *method,
const char *submethod)
{
Authctxt *authctxt = ssh->authctxt;
char *methods;
int partial = 0;
if (!authctxt->valid && authenticated)
fatal("INTERNAL ERROR: authenticated invalid user %s",
authctxt->user);
if (authenticated && authctxt->postponed)
fatal("INTERNAL ERROR: authenticated and postponed");
/* Special handling for root */
if (authenticated && authctxt->pw->pw_uid == 0 &&
!auth_root_allowed(ssh, method)) {
authenticated = 0;
#ifdef SSH_AUDIT_EVENTS
PRIVSEP(audit_event(SSH_LOGIN_ROOT_DENIED));
#endif
}
if (authenticated && options.num_auth_methods != 0) {
if (!auth2_update_methods_lists(authctxt, method, submethod)) {
authenticated = 0;
partial = 1;
}
}
/* Log before sending the reply */
auth_log(authctxt, authenticated, partial, method, submethod);
/* Update information exposed to session */
if (authenticated || partial)
auth2_update_session_info(authctxt, method, submethod);
if (authctxt->postponed)
return;
#ifdef USE_PAM
if (options.use_pam && authenticated) {
int r;
if (!PRIVSEP(do_pam_account())) {
/* if PAM returned a message, send it to the user */
if (sshbuf_len(loginmsg) > 0) {
if ((r = sshbuf_put(loginmsg, "\0", 1)) != 0)
fatal("%s: buffer error: %s",
__func__, ssh_err(r));
userauth_send_banner(sshbuf_ptr(loginmsg));
packet_write_wait();
}
fatal("Access denied for user %s by PAM account "
"configuration", authctxt->user);
}
}
#endif
if (authenticated == 1) {
/* turn off userauth */
ssh_dispatch_set(ssh, SSH2_MSG_USERAUTH_REQUEST, &dispatch_protocol_ignore);
packet_start(SSH2_MSG_USERAUTH_SUCCESS);
packet_send();
packet_write_wait();
/* now we can break out */
authctxt->success = 1;
ssh_packet_set_log_preamble(ssh, "user %s", authctxt->user);
} else {
/* Allow initial try of "none" auth without failure penalty */
if (!partial && !authctxt->server_caused_failure &&
(authctxt->attempt > 1 || strcmp(method, "none") != 0))
authctxt->failures++;
if (authctxt->failures >= options.max_authtries) {
#ifdef SSH_AUDIT_EVENTS
PRIVSEP(audit_event(SSH_LOGIN_EXCEED_MAXTRIES));
#endif
auth_maxtries_exceeded(authctxt);
}
methods = authmethods_get(authctxt);
debug3("%s: failure partial=%d next methods=\"%s\"", __func__,
partial, methods);
packet_start(SSH2_MSG_USERAUTH_FAILURE);
packet_put_cstring(methods);
packet_put_char(partial);
packet_send();
packet_write_wait();
free(methods);
}
}
/*
* Serialises the authentication (private) key to a blob, encrypting it with
* passphrase. The identification of the blob (lowest 64 bits of n) will
* precede the key to provide identification of the key without needing a
* passphrase.
*/
static int
sshkey_private_rsa1_to_blob(struct sshkey *key, struct sshbuf *blob,
const char *passphrase, const char *comment)
{
struct sshbuf *buffer = NULL, *encrypted = NULL;
u_char buf[8];
int r, cipher_num;
struct sshcipher_ctx ciphercontext;
const struct sshcipher *cipher;
u_char *cp;
/*
* If the passphrase is empty, use SSH_CIPHER_NONE to ease converting
* to another cipher; otherwise use SSH_AUTHFILE_CIPHER.
*/
cipher_num = (strcmp(passphrase, "") == 0) ?
SSH_CIPHER_NONE : SSH_AUTHFILE_CIPHER;
if ((cipher = cipher_by_number(cipher_num)) == NULL)
return SSH_ERR_INTERNAL_ERROR;
/* This buffer is used to build the secret part of the private key. */
if ((buffer = sshbuf_new()) == NULL)
return SSH_ERR_ALLOC_FAIL;
/* Put checkbytes for checking passphrase validity. */
if ((r = sshbuf_reserve(buffer, 4, &cp)) != 0)
goto out;
arc4random_buf(cp, 2);
memcpy(cp + 2, cp, 2);
/*
* Store the private key (n and e will not be stored because they
* will be stored in plain text, and storing them also in encrypted
* format would just give known plaintext).
* Note: q and p are stored in reverse order to SSL.
*/
if ((r = sshbuf_put_bignum1(buffer, key->rsa->d)) != 0 ||
(r = sshbuf_put_bignum1(buffer, key->rsa->iqmp)) != 0 ||
(r = sshbuf_put_bignum1(buffer, key->rsa->q)) != 0 ||
(r = sshbuf_put_bignum1(buffer, key->rsa->p)) != 0)
goto out;
/* Pad the part to be encrypted to a size that is a multiple of 8. */
bzero(buf, 8);
if ((r = sshbuf_put(buffer, buf, 8 - (sshbuf_len(buffer) % 8))) != 0)
goto out;
/* This buffer will be used to contain the data in the file. */
if ((encrypted = sshbuf_new()) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
/* First store keyfile id string. */
if ((r = sshbuf_put(encrypted, authfile_id_string,
sizeof(authfile_id_string))) != 0)
goto out;
/* Store cipher type and "reserved" field. */
if ((r = sshbuf_put_u8(encrypted, cipher_num)) != 0 ||
(r = sshbuf_put_u32(encrypted, 0)) != 0)
goto out;
/* Store public key. This will be in plain text. */
if ((r = sshbuf_put_u32(encrypted, BN_num_bits(key->rsa->n))) != 0 ||
(r = sshbuf_put_bignum1(encrypted, key->rsa->n) != 0) ||
(r = sshbuf_put_bignum1(encrypted, key->rsa->e) != 0) ||
(r = sshbuf_put_cstring(encrypted, comment) != 0))
goto out;
/* Allocate space for the private part of the key in the buffer. */
if ((r = sshbuf_reserve(encrypted, sshbuf_len(buffer), &cp)) != 0)
goto out;
if ((r = cipher_set_key_string(&ciphercontext, cipher, passphrase,
CIPHER_ENCRYPT)) != 0)
goto out;
if ((r = cipher_crypt(&ciphercontext, cp,
sshbuf_ptr(buffer), sshbuf_len(buffer), 0, 0)) != 0)
goto out;
if ((r = cipher_cleanup(&ciphercontext)) != 0)
goto out;
r = sshbuf_putb(blob, encrypted);
out:
bzero(&ciphercontext, sizeof(ciphercontext));
bzero(buf, sizeof(buf));
if (buffer != NULL)
sshbuf_free(buffer);
if (encrypted != NULL)
sshbuf_free(encrypted);
return r;
}
void
sshkey_fuzz_tests(void)
{
struct sshkey *k1;
struct sshbuf *buf, *fuzzed;
struct fuzz *fuzz;
int r;
TEST_START("fuzz RSA1 private");
buf = load_file("rsa1_1");
fuzz = fuzz_begin(FUZZ_1_BIT_FLIP | FUZZ_1_BYTE_FLIP |
FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END,
sshbuf_mutable_ptr(buf), sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz RSA1 public");
buf = load_file("rsa1_1_pw");
fuzz = fuzz_begin(FUZZ_1_BIT_FLIP | FUZZ_1_BYTE_FLIP |
FUZZ_TRUNCATE_START | FUZZ_TRUNCATE_END,
sshbuf_mutable_ptr(buf), sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_public_rsa1_fileblob(buf, &k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_public_rsa1_fileblob(fuzzed, &k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz RSA private");
buf = load_file("rsa_1");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz RSA new-format private");
buf = load_file("rsa_n");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz DSA private");
buf = load_file("dsa_1");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz DSA new-format private");
buf = load_file("dsa_n");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
#ifdef OPENSSL_HAS_ECC
TEST_START("fuzz ECDSA private");
buf = load_file("ecdsa_1");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz ECDSA new-format private");
buf = load_file("ecdsa_n");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
#endif
TEST_START("fuzz Ed25519 private");
buf = load_file("ed25519_1");
fuzz = fuzz_begin(FUZZ_BASE64, sshbuf_mutable_ptr(buf),
sshbuf_len(buf));
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshkey_free(k1);
sshbuf_free(buf);
ASSERT_PTR_NE(fuzzed = sshbuf_new(), NULL);
TEST_ONERROR(onerror, fuzz);
for(; !fuzz_done(fuzz); fuzz_next(fuzz)) {
r = sshbuf_put(fuzzed, fuzz_ptr(fuzz), fuzz_len(fuzz));
ASSERT_INT_EQ(r, 0);
if (sshkey_parse_private_fileblob(fuzzed, "", "key",
&k1, NULL) == 0)
sshkey_free(k1);
sshbuf_reset(fuzzed);
}
sshbuf_free(fuzzed);
fuzz_cleanup(fuzz);
TEST_DONE();
TEST_START("fuzz RSA public");
buf = load_file("rsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz RSA cert");
ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1"), &k1), 0);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz DSA public");
buf = load_file("dsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz DSA cert");
ASSERT_INT_EQ(sshkey_load_cert(test_data_file("dsa_1"), &k1), 0);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
#ifdef OPENSSL_HAS_ECC
TEST_START("fuzz ECDSA public");
buf = load_file("ecdsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz ECDSA cert");
ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ecdsa_1"), &k1), 0);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
#endif
TEST_START("fuzz Ed25519 public");
buf = load_file("ed25519_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz Ed25519 cert");
ASSERT_INT_EQ(sshkey_load_cert(test_data_file("ed25519_1"), &k1), 0);
public_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz RSA sig");
buf = load_file("rsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
sig_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
TEST_START("fuzz DSA sig");
buf = load_file("dsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
sig_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
#ifdef OPENSSL_HAS_ECC
TEST_START("fuzz ECDSA sig");
buf = load_file("ecdsa_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
sig_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
#endif
TEST_START("fuzz Ed25519 sig");
buf = load_file("ed25519_1");
ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", "key",
&k1, NULL), 0);
sshbuf_free(buf);
sig_fuzz(k1);
sshkey_free(k1);
TEST_DONE();
/* XXX fuzz decoded new-format blobs too */
}
