Portable OpenSSH
Go to file
dtucker@openbsd.org abc3e0a517 upstream: Add utf8.c for asmprintf used by krl.c
OpenBSD-Regress-ID: 433708d11165afdb189fe635151d21659dd37a37
2020-04-10 11:47:40 +10:00
contrib spelling mistakes 2020-03-13 14:23:07 +11:00
openbsd-compat fix inverted test for LibreSSL version 2020-04-06 10:04:56 +10:00
regress upstream: Add utf8.c for asmprintf used by krl.c 2020-04-10 11:47:40 +10:00
.depend depend 2020-02-06 12:02:22 +11:00
.gitignore Add config.log to .gitignore 2020-01-16 13:27:23 +11:00
.skipped-commit-ids upstream: Drop leading space from line count that was confusing 2020-02-28 12:27:41 +11:00
aclocal.m4
addrmatch.c
atomicio.c upstream: Check for both EAGAIN and EWOULDBLOCK. This is a no-op 2019-01-24 14:40:03 +11:00
atomicio.h
audit-bsm.c last bits of old packet API / active_state global 2019-01-20 14:55:27 +11:00
audit-linux.c last bits of old packet API / active_state global 2019-01-20 14:55:27 +11:00
audit.c last bits of old packet API / active_state global 2019-01-20 14:55:27 +11:00
audit.h last bits of old packet API / active_state global 2019-01-20 14:55:27 +11:00
auth2-chall.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
auth2-gss.c
auth2-hostbased.c upstream: Add new structure for signature options 2019-11-25 12:23:33 +11:00
auth2-kbdint.c upstream: stdarg.h required more broadly; ok djm 2019-11-15 08:50:10 +11:00
auth2-none.c
auth2-passwd.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
auth2-pubkey.c upstream: Replace "security key" with "authenticator" in program 2020-02-07 09:52:59 +11:00
auth2.c upstream: exit on parse failures in input_service_request; ok djm 2020-03-13 13:13:30 +11:00
auth-bsdauth.c remove duplicate #includes 2019-10-02 10:54:28 +10:00
auth-krb5.c
auth-options.c upstream: fix null-deref on calloc failure; ok djm 2020-03-13 13:13:30 +11:00
auth-options.h upstream: add a "no-touch-required" option for authorized_keys and 2019-11-25 12:23:40 +11:00
auth-pam.c Fix a couple of mysig_t leftovers. 2020-01-23 21:06:45 +11:00
auth-pam.h remove PAM dependencies on old packet API 2019-01-20 10:22:18 +11:00
auth-passwd.c
auth-rhosts.c upstream: remove some duplicate #includes 2019-10-02 10:43:47 +10:00
auth-shadow.c
auth-sia.c
auth-sia.h
auth.c upstream: Add a sshd_config "Include" directive to allow inclusion 2020-02-01 10:20:24 +11:00
auth.h remove duplicate #includes 2019-10-02 10:54:28 +10:00
authfd.c upstream: ssh_fetch_identitylist() returns the return value from 2020-03-13 13:18:09 +11:00
authfd.h upstream: Allow forwarding a different agent socket to the path 2019-12-21 13:22:07 +11:00
authfile.c upstream: let sshkey_try_load_public() load public keys from the 2020-04-08 10:14:21 +10:00
authfile.h upstream: factor out reading/writing sshbufs to dedicated 2020-01-26 10:18:42 +11:00
bitmap.c
bitmap.h
buildpkg.sh.in
canohost.c upstream: When system calls indicate an error they return -1, not 2019-07-05 11:10:39 +10:00
canohost.h
chacha.c
chacha.h
channels.c upstream: fix uninitialized pointers for forward_cancel; ok djm 2020-03-13 13:13:30 +11:00
channels.h upstream: add a comment describing the ranges of channel IDs that 2020-01-26 10:15:13 +11:00
cipher-aes.c
cipher-aesctr.c
cipher-aesctr.h
cipher-chachapoly-libcrypto.c Include openssl-compat.h before checking ifdefs. 2020-04-06 20:54:34 +10:00
cipher-chachapoly.c Include openssl-compat.h before checking ifdefs. 2020-04-06 20:54:34 +10:00
cipher-chachapoly.h upstream: make Chacha20-POLY1305 context struct opaque; ok tb@ as 2020-04-03 15:36:57 +11:00
cipher-ctr.c
cipher.c upstream: make Chacha20-POLY1305 context struct opaque; ok tb@ as 2020-04-03 15:36:57 +11:00
cipher.h upstream: Make zlib optional. This adds a "ZLIB" build time option 2020-01-23 21:53:54 +11:00
cleanup.c
clientloop.c upstream: make failures when establishing "Tunnel" forwarding terminate 2020-04-03 13:42:33 +11:00
clientloop.h upstream: make failures when establishing "Tunnel" forwarding terminate 2020-04-03 13:42:33 +11:00
compat.c
compat.h
config.guess
config.sub
configure.ac prefer libcrypto chacha20-poly1305 where possible 2020-04-03 17:26:29 +11:00
CREDITS convert to UTF-8; from Mike Frysinger 2019-07-29 09:49:23 +10:00
crypto_api.h upstream: Add support for a PQC KEX/KEM: 2019-01-21 22:07:02 +11:00
defines.h Check if UINT32_MAX is defined before redefining. 2020-02-09 11:23:35 +11:00
dh.c upstream: typo in previous 2019-09-08 14:49:04 +10:00
dh.h upstream: fixes for !WITH_OPENSSL compilation; ok dtucker@ 2019-09-06 17:54:21 +10:00
digest-libc.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
digest-openssl.c Remove configure test & compat code for ripemd160. 2020-01-14 12:05:00 +11:00
digest.h
dispatch.c upstream: allow sshpkt_fatal() to take a varargs format; we'll 2019-01-20 09:02:20 +11:00
dispatch.h upstream: remove last traces of old packet API! 2019-01-20 09:45:18 +11:00
dns.c remove duplicate #includes 2019-10-02 10:54:28 +10:00
dns.h
ed25519.c
entropy.c Fix a couple of mysig_t leftovers. 2020-01-23 21:06:45 +11:00
entropy.h
fatal.c
fe25519.c
fe25519.h
fixalgorithms
fixpaths
ge25519_base.data
ge25519.c
ge25519.h
groupaccess.c upstream: Move checks for lists of users or groups into their own 2019-03-08 15:10:07 +11:00
groupaccess.h
gss-genr.c
gss-serv-krb5.c
gss-serv.c upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
hash.c Wrap sha2.h include in ifdef. 2019-11-29 20:21:36 +11:00
hmac.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
hmac.h
hostfile.c upstream: fix possible null-deref in check_key_not_revoked; ok 2020-03-13 13:18:09 +11:00
hostfile.h
includes.h
INSTALL fix some typos and sentence 2020-02-21 12:29:05 +11:00
install-sh
kex.c upstream: use sshpkt_fatal() for kex_exchange_identification() 2020-03-14 19:39:30 +11:00
kex.h remove duplicate #includes 2019-10-02 10:54:28 +10:00
kexc25519.c upstream: rename kex->kem_client_pub -> kex->client_pub now that 2019-01-21 23:13:03 +11:00
kexdh.c typo 2019-01-22 10:50:40 +11:00
kexecdh.c Put ssherr.h back as it's actually needed. 2019-10-02 14:30:55 +10:00
kexgen.c upstream: Add new structure for signature options 2019-11-25 12:23:33 +11:00
kexgex.c upstream: pass most arguments to the KEX hash functions as sshbuf 2019-01-23 13:02:02 +11:00
kexgexc.c upstream: Add new structure for signature options 2019-11-25 12:23:33 +11:00
kexgexs.c upstream: pass most arguments to the KEX hash functions as sshbuf 2019-01-23 13:02:02 +11:00
kexsntrup4591761x25519.c new files need includes.h 2019-01-22 00:02:23 +11:00
krl.c upstream: avoid another compiler warning spotted in -portable 2020-04-03 16:53:50 +11:00
krl.h upstream: give ssh-keygen the ability to dump the contents of a 2020-04-03 13:33:25 +11:00
LICENCE convert to UTF-8; from Mike Frysinger 2019-07-29 09:49:23 +10:00
log.c
log.h upstream: lots of things were relying on libcrypto headers to 2019-09-06 17:54:21 +10:00
loginrec.c upstream: lots of things were relying on libcrypto headers to 2019-09-06 17:54:21 +10:00
loginrec.h remove vestiges of old packet API from loginrec.c 2019-01-20 09:58:45 +11:00
logintest.c
mac.c remove duplicate #includes 2019-10-02 10:54:28 +10:00
mac.h
Makefile.in prefer libcrypto chacha20-poly1305 where possible 2020-04-03 17:26:29 +11:00
match.c upstream: stdarg.h required more broadly; ok djm 2019-11-15 08:50:10 +11:00
match.h upstream: Move checks for lists of users or groups into their own 2019-03-08 15:10:07 +11:00
md5crypt.c
md5crypt.h
mdoc2man.awk
misc.c upstream: make IPTOS_DSCP_LE available via IPQoS directive; bz2986, 2020-01-28 12:52:46 +11:00
misc.h upstream: add xextendf() to extend a string with a format 2020-01-25 11:27:29 +11:00
mkinstalldirs
moduli Import regenerated moduli. 2020-02-20 16:42:50 +11:00
moduli.5
moduli.c upstream: remove most uses of BN_CTX 2019-11-17 09:44:43 +11:00
monitor_fdpass.c
monitor_fdpass.h
monitor_wrap.c upstream: allow security keys to act as host keys as well as user 2019-12-16 14:19:41 +11:00
monitor_wrap.h upstream: Add new structure for signature options 2019-11-25 12:23:33 +11:00
monitor.c upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
monitor.h upstream: remove last references to active_state 2019-01-20 09:45:18 +11:00
msg.c upstream: some __func__ and strerror(errno) here; no functional 2020-01-22 17:17:51 +11:00
msg.h
mux.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
myproposal.h upstream: remove ssh-rsa (SHA1) from the list of allowed CA 2020-01-25 11:27:29 +11:00
nchan2.ms
nchan.c upstream: When system calls indicate an error they return -1, not 2019-07-05 11:10:39 +10:00
nchan.ms
openssh.xml.in
opensshd.init.in
OVERVIEW
packet.c upstream: consistently check packet_timeout_ms against 0; ok djm 2020-03-13 13:18:09 +11:00
packet.h upstream: sshpkt_fatal() does not return; ok djm 2020-03-13 13:13:30 +11:00
pathnames.h upstream: enable ed25519 support; ok djm 2019-11-13 08:54:09 +11:00
pkcs11.h
platform-misc.c
platform-pledge.c
platform-tracing.c
platform.c Add headers to prevent warnings w/out OpenSSL. 2019-07-23 22:26:20 +10:00
platform.h
poly1305.c
poly1305.h
progressmeter.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
progressmeter.h upstream: Have progressmeter force an update at the beginning and 2019-01-25 06:32:14 +11:00
PROTOCOL upstream: Fix some typos and an incorrect word in docs. Patch from 2020-02-21 12:27:23 +11:00
PROTOCOL.agent
PROTOCOL.certkeys upstream: document the "no-touch-required" certificate extension; 2019-11-25 12:25:53 +11:00
PROTOCOL.chacha20poly1305 upstream: Fix some typos and an incorrect word in docs. Patch from 2020-02-21 12:27:23 +11:00
PROTOCOL.key
PROTOCOL.krl
PROTOCOL.mux upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
PROTOCOL.sshsig upstream: sshsig tweaks and improvements from and suggested by 2019-09-03 18:40:24 +10:00
PROTOCOL.u2f upstream: Fix some typos and an incorrect word in docs. Patch from 2020-02-21 12:27:23 +11:00
readconf.c upstream: %C expansion just added to Match Exec should include 2020-04-03 15:35:28 +11:00
readconf.h upstream: Make with config keywords support which 2020-04-03 13:33:37 +11:00
README crank version numbers 2020-02-12 09:28:35 +11:00
README.dns Minor documentation update: 2020-02-11 12:51:24 +11:00
README.md typo; reported by Phil Pennock 2020-02-07 15:13:26 +11:00
README.platform
README.privsep Privsep is now required. 2019-09-19 15:41:23 +10:00
README.tun
readpass.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
rijndael.c
rijndael.h
sandbox-capsicum.c
sandbox-darwin.c sandbox-darwin.c: fix missing prototypes. 2020-01-21 10:37:25 +11:00
sandbox-null.c
sandbox-pledge.c
sandbox-rlimit.c
sandbox-seccomp-filter.c add clock_gettime64(2) to sandbox allowed syscalls 2020-02-03 19:40:12 +11:00
sandbox-solaris.c
sandbox-systrace.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
sc25519.c
sc25519.h
scp.1 upstream: tweak the Nd lines for a bit of consistency; ok markus 2019-12-11 19:08:22 +11:00
scp.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
servconf.c upstream: fix relative includes in sshd_config; ok djm 2020-03-13 13:18:31 +11:00
servconf.h Use sys-queue.h from compat library. 2020-02-01 17:25:09 +11:00
serverloop.c upstream: use sshpkt_fatal() instead of plain fatal() for 2020-01-30 18:22:34 +11:00
serverloop.h
session.c upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
session.h
sftp-client.c upstream: fix memory leak in error path; bz#3074 patch from 2019-10-04 14:34:05 +10:00
sftp-client.h
sftp-common.c Include unistd.h for strmode(). 2019-01-24 10:07:03 +11:00
sftp-common.h
sftp-glob.c upstream: stdarg.h required more broadly; ok djm 2019-11-15 08:50:10 +11:00
sftp-realpath.c sftp-realpath.c needs includes.h 2019-07-08 13:44:32 +10:00
sftp-server-main.c upstream: Replace calls to ssh_malloc_init() by a static init of 2019-06-08 00:25:42 +10:00
sftp-server.8 upstream: tweak the Nd lines for a bit of consistency; ok markus 2019-12-11 19:08:22 +11:00
sftp-server.c upstream: add a local implementation of BSD realpath() for 2019-07-08 11:44:49 +10:00
sftp.1 upstream: sort -N and add it to usage(); 2020-04-03 17:09:42 +11:00
sftp.c upstream: sort -N and add it to usage(); 2020-04-03 17:09:42 +11:00
sftp.h
sk-api.h upstream: improve the error message for u2f enrollment errors by 2020-01-26 10:18:42 +11:00
sk-usbhid.c upstream: changes to support FIDO attestation 2020-01-29 18:52:55 +11:00
smult_curve25519_ref.c
sntrup4591761.c Add includes.h for compat layer. 2019-04-01 20:07:23 +11:00
sntrup4591761.sh upstream: Add authors for public domain sntrup4591761 code; 2019-02-01 18:55:11 +11:00
ssh2.h
ssh_api.c upstream: Refactor signing - use sshkey_sign for everything, 2019-11-01 09:46:10 +11:00
ssh_api.h
ssh_config upstream: Remove obsolete "Protocol" from commented out examples. Patch 2019-02-04 15:01:38 +11:00
ssh_config.5 upstream: Add TOKEN percent expansion to LocalFoward and RemoteForward 2020-04-10 11:47:19 +10:00
ssh-add.1 upstream: sync the description of the $SSH_SK_PROVIDER environment 2020-02-07 15:03:20 +11:00
ssh-add.c upstream: Cast lifetime to u_long for comparison to prevent unsigned 2020-03-17 09:48:36 +11:00
ssh-agent.1 upstream: Replace the term "security key" with "(FIDO) 2019-12-30 14:31:40 +11:00
ssh-agent.c upstream: initialize seconds for debug message; ok djm 2020-03-13 13:18:31 +11:00
ssh-dss.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
ssh-ecdsa-sk.c Fix building without openssl. 2020-01-20 21:14:46 +11:00
ssh-ecdsa.c upstream: Make sshpkt_get_bignum2() allocate the bignum it is 2019-01-21 21:47:28 +11:00
ssh-ed25519-sk.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
ssh-ed25519.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
ssh-gss.h
ssh-keygen.1 upstream: give ssh-keygen the ability to dump the contents of a 2020-04-03 13:33:25 +11:00
ssh-keygen.c upstream: give ssh-keygen the ability to dump the contents of a 2020-04-03 13:33:25 +11:00
ssh-keyscan.1 upstream: tweak the Nd lines for a bit of consistency; ok markus 2019-12-11 19:08:22 +11:00
ssh-keyscan.c upstream: allow ssh-keyscan to find security key hostkeys 2019-12-16 14:19:41 +11:00
ssh-keysign.8 upstream: tweak the Nd lines for a bit of consistency; ok markus 2019-12-11 19:08:22 +11:00
ssh-keysign.c upstream: additional missing stdarg.h includes when built without 2019-11-20 09:27:29 +11:00
ssh-pkcs11-client.c upstream: expose PKCS#11 key labels/X.509 subjects as comments 2020-01-25 11:35:55 +11:00
ssh-pkcs11-helper.8 upstream: tweak the Nd lines for a bit of consistency; ok markus 2019-12-11 19:08:22 +11:00
ssh-pkcs11-helper.c upstream: remove unused variables in ssh-pkcs11-helper; ok djm 2020-03-13 13:18:31 +11:00
ssh-pkcs11.c upstream: improve error messages for some common PKCS#11 C_Login 2020-03-14 19:39:30 +11:00
ssh-pkcs11.h upstream: expose PKCS#11 key labels/X.509 subjects as comments 2020-01-25 11:35:55 +11:00
ssh-rsa.c
ssh-sandbox.h
ssh-sk-client.c upstream: Replace all calls to signal(2) with a wrapper around 2020-01-23 18:51:25 +11:00
ssh-sk-helper.8 upstream: Replace the term "security key" with "(FIDO) 2019-12-30 14:31:40 +11:00
ssh-sk-helper.c upstream: improve the error message for u2f enrollment errors by 2020-01-26 10:18:42 +11:00
ssh-sk.c upstream: return correct error in sshsk_ed25519_sig; ok djm 2020-03-13 13:18:09 +11:00
ssh-sk.h upstream: pass the log-on-stderr flag and log level through to 2020-01-21 18:09:09 +11:00
ssh-xmss.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
ssh.1 upstream: document -F none; with jmc@ 2020-02-18 20:23:25 +11:00
ssh.c upstream: Add TOKEN percent expansion to LocalFoward and RemoteForward 2020-04-10 11:47:19 +10:00
ssh.h
sshbuf-getput-basic.c upstream: allow sshbuf_put_stringb(buf, NULL); ok markus@ 2019-12-14 07:17:44 +11:00
sshbuf-getput-crypto.c upstream: remove most uses of BN_CTX 2019-11-17 09:44:43 +11:00
sshbuf-io.c upstream: tidy headers; some junk snuck into sshbuf-misc.c and 2020-01-26 10:34:50 +11:00
sshbuf-misc.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
sshbuf.c upstream: change explicit_bzero();free() to freezero() 2020-02-28 12:26:28 +11:00
sshbuf.h upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
sshconnect2.c upstream: When using HostkeyAlgorithms to merely append or remove 2020-02-07 09:53:00 +11:00
sshconnect.c upstream: use sshpkt_fatal() for kex_exchange_identification() 2020-03-14 19:39:30 +11:00
sshconnect.h upstream: when AddKeysToAgent=yes is set and the key contains no 2020-01-25 18:20:01 +11:00
sshd_config
sshd_config.5 upstream: Add ssh -Q key-sig for all key and signature types. 2020-02-07 15:03:20 +11:00
sshd.8 upstream: mention that permitopen=/PermitOpen do no name to address 2020-01-25 17:04:14 +11:00
sshd.c upstream: use sshpkt_fatal() for kex_exchange_identification() 2020-03-14 19:39:30 +11:00
ssherr.c upstream: improve the error message for u2f enrollment errors by 2020-01-26 10:18:42 +11:00
ssherr.h upstream: improve the error message for u2f enrollment errors by 2020-01-26 10:18:42 +11:00
sshkey-xmss.c upstream: fix shield/unshield for xmss keys: - in ssh-agent we need 2019-11-15 08:50:10 +11:00
sshkey-xmss.h
sshkey.c upstream: add sshkey_parse_pubkey_from_private_fileblob_type() 2020-04-08 10:14:21 +10:00
sshkey.h upstream: add sshkey_parse_pubkey_from_private_fileblob_type() 2020-04-08 10:14:21 +10:00
sshlogin.c Remove unused variable warning. 2020-02-17 22:55:51 +11:00
sshlogin.h
sshpty.c Do not fatal on failed lookup of group "tty". 2019-07-05 13:23:46 +10:00
sshpty.h
sshsig.c upstream: do not leak oprincipals; ok djm 2020-03-13 13:18:31 +11:00
sshsig.h upstream: ssh-keygen -Y find-principals fixes based on feedback 2020-01-25 11:27:29 +11:00
sshtty.c
survey.sh.in
TODO
ttymodes.c
ttymodes.h
uidswap.c explicitly test set[ug]id() return values 2019-09-13 13:15:14 +10:00
uidswap.h
umac128.c
umac.c upstream: spelling errors in comments; no code change from 2020-03-14 19:39:09 +11:00
umac.h upstream: Typo and spelling fixes in comments and error messages. 2019-06-08 00:49:26 +10:00
utf8.c upstream: add allocating variant of the safe utf8 printer; ok 2020-04-03 13:32:50 +11:00
utf8.h upstream: add allocating variant of the safe utf8 printer; ok 2020-04-03 13:32:50 +11:00
verify.c
version.h upstream: openssh-8.2 2020-02-14 11:40:54 +11:00
xmalloc.c upstream: add xvasprintf() 2019-11-13 10:15:46 +11:00
xmalloc.h upstream: add xvasprintf() 2019-11-13 10:15:46 +11:00
xmss_commons.c wrap stdint.h include in HAVE_STDINT_H 2019-10-09 09:06:35 +11:00
xmss_commons.h
xmss_fast.c wrap stdint.h include in HAVE_STDINT_H 2019-10-09 09:06:35 +11:00
xmss_fast.h
xmss_hash_address.c wrap stdint.h include in HAVE_STDINT_H 2019-10-09 09:06:35 +11:00
xmss_hash_address.h
xmss_hash.c wrap stdint.h include in HAVE_STDINT_H 2019-10-09 09:06:35 +11:00
xmss_hash.h
xmss_wots.c wrap stdint.h include in HAVE_STDINT_H 2019-10-09 09:06:35 +11:00
xmss_wots.h

Portable OpenSSH

Fuzzing Status

OpenSSH is a complete implementation of the SSH protocol (version 2) for secure remote login, command execution and file transfer. It includes a client ssh and server sshd, file transfer utilities scp and sftp as well as tools for key generation (ssh-keygen), run-time key storage (ssh-agent) and a number of supporting programs.

This is a port of OpenBSD's OpenSSH to most Unix-like operating systems, including Linux, OS X and Cygwin. Portable OpenSSH polyfills OpenBSD APIs that are not available elsewhere, adds sshd sandboxing for more operating systems and includes support for OS-native authentication and auditing (e.g. using PAM).

Documentation

The official documentation for OpenSSH are the man pages for each tool:

Stable Releases

Stable release tarballs are available from a number of download mirrors. We recommend the use of a stable release for most users. Please read the release notes for details of recent changes and potential incompatibilities.

Building Portable OpenSSH

Dependencies

Portable OpenSSH is built using autoconf and make. It requires a working C compiler, standard library and headers, and zlib. libcrypto from either LibreSSL or OpenSSL may also be used, but OpenSSH may be built without it supporting a subset of crypto algorithms.

FIDO security token support need libfido2 and its dependencies. Also, certain platforms and build-time options may require additional dependencies, see README.platform for details.

Building a release

Releases include a pre-built copy of the configure script and may be built using:

tar zxvf openssh-X.YpZ.tar.gz
cd openssh
./configure # [options]
make && make tests

See the Build-time Customisation section below for configure options. If you plan on installing OpenSSH to your system, then you will usually want to specify destination paths.

Building from git

If building from git, you'll need autoconf installed to build the configure script. The following commands will check out and build portable OpenSSH from git:

git clone https://github.com/openssh/openssh-portable # or https://anongit.mindrot.org/openssh.git
cd openssh-portable
autoreconf
./configure
make && make tests

Build-time Customisation

There are many build-time customisation options available. All Autoconf destination path flags (e.g. --prefix) are supported (and are usually required if you want to install OpenSSH).

For a full list of available flags, run configure --help but a few of the more frequently-used ones are described below. Some of these flags will require additional libraries and/or headers be installed.

Flag Meaning
--with-pam Enable PAM support. OpenPAM, Linux PAM and Solaris PAM are supported.
--with-libedit Enable libedit support for sftp.
--with-kerberos5 Enable Kerberos/GSSAPI support. Both Heimdal and MIT Kerberos implementations are supported.
--with-selinux Enable SELinux support.
--with-security-key-builtin Include built-in support for U2F/FIDO2 security keys. This requires libfido2 be installed.

Development

Portable OpenSSH development is discussed on the openssh-unix-dev mailing list (archive mirror). Bugs and feature requests are tracked on our Bugzilla.

Reporting bugs

Non-security bugs may be reported to the developers via Bugzilla or via the mailing list above. Security bugs should be reported to openssh@openssh.com.