openssh/openssh-6.6p1-fips.patch

Index: openssh-7.1p2/cipher.c
===================================================================
--- openssh-7.1p2.orig/cipher.c
+++ openssh-7.1p2/cipher.c
@@ -39,6 +39,8 @@
 
 #include <sys/types.h>
 
+#include <openssl/fips.h>
+
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -99,6 +101,26 @@ static const struct sshcipher ciphers[]
 	{ NULL,		SSH_CIPHER_INVALID, 0, 0, 0, 0, 0, 0, NULL }
 };
 
+static const struct sshcipher fips_ciphers[] = {
+	{ "none",	SSH_CIPHER_NONE, 8, 0, 0, 0, 0, 0, EVP_enc_null },
+	{ "3des-cbc",	SSH_CIPHER_SSH2, 8, 24, 0, 0, 0, 1, EVP_des_ede3_cbc },
+	{ "aes128-cbc",	SSH_CIPHER_SSH2, 16, 16, 0, 0, 0, 1, EVP_aes_128_cbc },
+	{ "aes192-cbc",	SSH_CIPHER_SSH2, 16, 24, 0, 0, 0, 1, EVP_aes_192_cbc },
+	{ "aes256-cbc",	SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 1, EVP_aes_256_cbc },
+	{ "rijndael-cbc@lysator.liu.se",
+			SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 1, EVP_aes_256_cbc },
+	{ "aes128-ctr",	SSH_CIPHER_SSH2, 16, 16, 0, 0, 0, 0, EVP_aes_128_ctr },
+	{ "aes192-ctr",	SSH_CIPHER_SSH2, 16, 24, 0, 0, 0, 0, EVP_aes_192_ctr },
+	{ "aes256-ctr",	SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 0, EVP_aes_256_ctr },
+#ifdef OPENSSL_HAVE_EVPGCM
+	{ "aes128-gcm@openssh.com",
+			SSH_CIPHER_SSH2, 16, 16, 12, 16, 0, 0, EVP_aes_128_gcm },
+	{ "aes256-gcm@openssh.com",
+			SSH_CIPHER_SSH2, 16, 32, 12, 16, 0, 0, EVP_aes_256_gcm },
+#endif
+	{ NULL,		SSH_CIPHER_INVALID, 0, 0, 0, 0, 0, 0, NULL }
+};
+
 /*--*/
 
 /* Returns a comma-separated list of supported ciphers. */
@@ -109,7 +131,7 @@ cipher_alg_list(char sep, int auth_only)
 	size_t nlen, rlen = 0;
 	const struct sshcipher *c;
 
-	for (c = ciphers; c->name != NULL; c++) {
+	for (c = FIPS_mode() ? fips_ciphers : ciphers; c->name != NULL; c++) {
 		if (c->number != SSH_CIPHER_SSH2)
 			continue;
 		if (auth_only && c->auth_len == 0)
@@ -193,7 +215,7 @@ const struct sshcipher *
 cipher_by_name(const char *name)
 {
 	const struct sshcipher *c;
-	for (c = ciphers; c->name != NULL; c++)
+	for (c = FIPS_mode() ? fips_ciphers : ciphers; c->name != NULL; c++)
 		if (strcmp(c->name, name) == 0)
 			return c;
 	return NULL;
@@ -203,7 +225,7 @@ const struct sshcipher *
 cipher_by_number(int id)
 {
 	const struct sshcipher *c;
-	for (c = ciphers; c->name != NULL; c++)
+	for (c = FIPS_mode() ? fips_ciphers : ciphers; c->name != NULL; c++)
 		if (c->number == id)
 			return c;
 	return NULL;
@@ -244,7 +266,7 @@ cipher_number(const char *name)
 	const struct sshcipher *c;
 	if (name == NULL)
 		return -1;
-	for (c = ciphers; c->name != NULL; c++)
+	for (c = FIPS_mode() ? fips_ciphers : ciphers; c->name != NULL; c++)
 		if (strcasecmp(c->name, name) == 0)
 			return c->number;
 	return -1;
Index: openssh-7.1p2/cipher-ctr.c
===================================================================
--- openssh-7.1p2.orig/cipher-ctr.c
+++ openssh-7.1p2/cipher-ctr.c
@@ -138,7 +138,8 @@ evp_aes_128_ctr(void)
 	aes_ctr.do_cipher = ssh_aes_ctr;
 #ifndef SSH_OLD_EVP
 	aes_ctr.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH |
-	    EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_IV;
+	    EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_IV |
+	    EVP_CIPH_FLAG_FIPS;
 #endif
 	return (&aes_ctr);
 }
Index: openssh-7.1p2/dh.h
===================================================================
--- openssh-7.1p2.orig/dh.h
+++ openssh-7.1p2/dh.h
@@ -46,6 +46,7 @@ u_int	 dh_estimate(int);
 
 /* Min and max values from RFC4419. */
 #define DH_GRP_MIN	1024
+#define DH_GRP_MIN_FIPS	2048
 #define DH_GRP_MAX	8192
 
 /*
Index: openssh-7.1p2/entropy.c
===================================================================
--- openssh-7.1p2.orig/entropy.c
+++ openssh-7.1p2/entropy.c
@@ -218,6 +218,8 @@ seed_rng(void)
 		fatal("OpenSSL version mismatch. Built against %lx, you "
 		    "have %lx", (u_long)OPENSSL_VERSION_NUMBER, SSLeay());
 #endif
+	/* clean the PRNG status when exiting the program */
+	atexit(RAND_cleanup);
 #ifndef OPENSSL_PRNG_ONLY
 	if (RAND_status() == 1) {
 		debug3("RNG is ready, skipping seeding");
Index: openssh-7.1p2/kex.c
===================================================================
--- openssh-7.1p2.orig/kex.c
+++ openssh-7.1p2/kex.c
@@ -35,6 +35,7 @@
 
 #ifdef WITH_OPENSSL
 #include <openssl/crypto.h>
+#include <openssl/fips.h>
 #endif
 
 #include "ssh2.h"
@@ -108,6 +109,25 @@ static const struct kexalg kexalgs[] = {
 	{ NULL, -1, -1, -1},
 };
 
+static const struct kexalg kexalgs_fips[] = {
+	{ KEX_DH14, KEX_DH_GRP14_SHA1, 0, SSH_DIGEST_SHA1 },
+	{ KEX_DHGEX_SHA1, KEX_DH_GEX_SHA1, 0, SSH_DIGEST_SHA1 },
+#ifdef HAVE_EVP_SHA256
+	{ KEX_DHGEX_SHA256, KEX_DH_GEX_SHA256, 0, SSH_DIGEST_SHA256 },
+#endif
+#ifdef OPENSSL_HAS_ECC
+	{ KEX_ECDH_SHA2_NISTP256, KEX_ECDH_SHA2,
+	    NID_X9_62_prime256v1, SSH_DIGEST_SHA256 },
+	{ KEX_ECDH_SHA2_NISTP384, KEX_ECDH_SHA2, NID_secp384r1,
+	    SSH_DIGEST_SHA384 },
+# ifdef OPENSSL_HAS_NISTP521
+	{ KEX_ECDH_SHA2_NISTP521, KEX_ECDH_SHA2, NID_secp521r1,
+	    SSH_DIGEST_SHA512 },
+# endif
+#endif
+	{ NULL, -1, -1, -1},
+};
+
 char *
 kex_alg_list(char sep)
 {
@@ -135,7 +155,7 @@ kex_alg_by_name(const char *name)
 {
 	const struct kexalg *k;
 
-	for (k = kexalgs; k->name != NULL; k++) {
+	for (k = (FIPS_mode() ? kexalgs_fips : kexalgs); k->name != NULL; k++) {
 		if (strcmp(k->name, name) == 0)
 			return k;
 #ifdef GSSAPI
@@ -161,7 +181,10 @@ kex_names_valid(const char *names)
 	for ((p = strsep(&cp, ",")); p && *p != '\0';
 	    (p = strsep(&cp, ","))) {
 		if (kex_alg_by_name(p) == NULL) {
-			error("Unsupported KEX algorithm \"%.100s\"", p);
+			if (FIPS_mode())
+				error("\"%.100s\" is not allowed in FIPS mode", p);
+			else
+				error("Unsupported KEX algorithm \"%.100s\"", p);
 			free(s);
 			return 0;
 		}
Index: openssh-7.1p2/kexgexc.c
===================================================================
--- openssh-7.1p2.orig/kexgexc.c
+++ openssh-7.1p2/kexgexc.c
@@ -28,6 +28,7 @@
 
 #ifdef WITH_OPENSSL
 
+#include <openssl/fips.h>
 #include <sys/param.h>
 #include <sys/types.h>
 
@@ -63,7 +64,7 @@ kexgex_client(struct ssh *ssh)
 
 	nbits = dh_estimate(kex->dh_need * 8);
 
-	kex->min = DH_GRP_MIN;
+	kex->min = FIPS_mode() ? DH_GRP_MIN_FIPS : DH_GRP_MIN;
 	kex->max = DH_GRP_MAX;
 	kex->nbits = nbits;
 	if (datafellows & SSH_BUG_DHGEX_LARGE)
Index: openssh-7.1p2/kexgexs.c
===================================================================
--- openssh-7.1p2.orig/kexgexs.c
+++ openssh-7.1p2/kexgexs.c
@@ -83,9 +83,9 @@ input_kex_dh_gex_request(int type, u_int
 	kex->nbits = nbits;
 	kex->min = min;
 	kex->max = max;
-	min = MAX(DH_GRP_MIN, min);
+	min = MAX(FIPS_mode() ? DH_GRP_MIN_FIPS : DH_GRP_MIN, min);
 	max = MIN(DH_GRP_MAX, max);
-	nbits = MAX(DH_GRP_MIN, nbits);
+	nbits = MAX(FIPS_mode() ? DH_GRP_MIN_FIPS : DH_GRP_MIN, nbits);
 	nbits = MIN(DH_GRP_MAX, nbits);
 
 	if (kex->max < kex->min || kex->nbits < kex->min ||
Index: openssh-7.1p2/mac.c
===================================================================
--- openssh-7.1p2.orig/mac.c
+++ openssh-7.1p2/mac.c
@@ -27,6 +27,8 @@
 
 #include <sys/types.h>
 
+#include <openssl/fips.h>
+
 #include <string.h>
 #include <stdio.h>
 
@@ -54,7 +56,7 @@ struct macalg {
 	int		etm;		/* Encrypt-then-MAC */
 };
 
-static const struct macalg macs[] = {
+static const struct macalg all_macs[] = {
 	/* Encrypt-and-MAC (encrypt-and-authenticate) variants */
 	{ "hmac-sha1",				SSH_DIGEST, SSH_DIGEST_SHA1, 0, 0, 0, 0 },
 	{ "hmac-sha1-96",			SSH_DIGEST, SSH_DIGEST_SHA1, 96, 0, 0, 0 },
@@ -85,6 +87,24 @@ static const struct macalg macs[] = {
 	{ NULL,					0, 0, 0, 0, 0, 0 }
 };
 
+static const struct macalg fips_macs[] = {
+	/* Encrypt-and-MAC (encrypt-and-authenticate) variants */
+	{ "hmac-sha1",				SSH_DIGEST, SSH_DIGEST_SHA1, 0, 0, 0, 0 },
+#ifdef HAVE_EVP_SHA256
+	{ "hmac-sha2-256",			SSH_DIGEST, SSH_DIGEST_SHA256, 0, 0, 0, 0 },
+	{ "hmac-sha2-512",			SSH_DIGEST, SSH_DIGEST_SHA512, 0, 0, 0, 0 },
+#endif
+
+	/* Encrypt-then-MAC variants */
+	{ "hmac-sha1-etm@openssh.com",		SSH_DIGEST, SSH_DIGEST_SHA1, 0, 0, 0, 1 },
+#ifdef HAVE_EVP_SHA256
+	{ "hmac-sha2-256-etm@openssh.com",	SSH_DIGEST, SSH_DIGEST_SHA256, 0, 0, 0, 1 },
+	{ "hmac-sha2-512-etm@openssh.com",	SSH_DIGEST, SSH_DIGEST_SHA512, 0, 0, 0, 1 },
+#endif
+
+	{ NULL,					0, 0, 0, 0, 0, 0 }
+};
+
 /* Returns a list of supported MACs separated by the specified char. */
 char *
 mac_alg_list(char sep)
@@ -93,7 +113,7 @@ mac_alg_list(char sep)
 	size_t nlen, rlen = 0;
 	const struct macalg *m;
 
-	for (m = macs; m->name != NULL; m++) {
+	for (m = FIPS_mode() ? fips_macs : all_macs; m->name != NULL; m++) {
 		if (ret != NULL)
 			ret[rlen++] = sep;
 		nlen = strlen(m->name);
@@ -132,7 +152,7 @@ mac_setup(struct sshmac *mac, char *name
 {
 	const struct macalg *m;
 
-	for (m = macs; m->name != NULL; m++) {
+	for (m = FIPS_mode() ? fips_macs : all_macs; m->name != NULL; m++) {
 		if (strcmp(name, m->name) != 0)
 			continue;
 		if (mac != NULL)
Index: openssh-7.1p2/Makefile.in
===================================================================
--- openssh-7.1p2.orig/Makefile.in
+++ openssh-7.1p2/Makefile.in
@@ -165,25 +165,25 @@ libssh.a: $(LIBSSH_OBJS)
 	$(RANLIB) $@
 
 ssh$(EXEEXT): $(LIBCOMPAT) libssh.a $(SSHOBJS)
-	$(LD) -o $@ $(SSHOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHLIBS) $(LIBS) $(GSSLIBS)
+	$(LD) -o $@ $(SSHOBJS) $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(SSHLIBS) $(LIBS) $(GSSLIBS)
 
 sshd$(EXEEXT): libssh.a	$(LIBCOMPAT) $(SSHDOBJS)
-	$(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHDLIBS) $(LIBS) $(GSSLIBS) $(K5LIBS)
+	$(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(SSHDLIBS) $(LIBS) $(GSSLIBS) $(K5LIBS)
 
 scp$(EXEEXT): $(LIBCOMPAT) libssh.a scp.o progressmeter.o
-	$(LD) -o $@ scp.o progressmeter.o bufaux.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
+	$(LD) -o $@ scp.o progressmeter.o bufaux.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-add$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-add.o
-	$(LD) -o $@ ssh-add.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
+	$(LD) -o $@ ssh-add.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-agent$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-agent.o ssh-pkcs11-client.o
-	$(LD) -o $@ ssh-agent.o ssh-pkcs11-client.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
+	$(LD) -o $@ ssh-agent.o ssh-pkcs11-client.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-keygen$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-keygen.o
-	$(LD) -o $@ ssh-keygen.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
+	$(LD) -o $@ ssh-keygen.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-keysign$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-keysign.o roaming_dummy.o readconf.o
-	$(LD) -o $@ ssh-keysign.o readconf.o roaming_dummy.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
+	$(LD) -o $@ ssh-keysign.o readconf.o roaming_dummy.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-pkcs11-helper$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-pkcs11-helper.o ssh-pkcs11.o
 	$(LD) -o $@ ssh-pkcs11-helper.o ssh-pkcs11.o $(LDFLAGS) -lssh -lopenbsd-compat -lssh -lopenbsd-compat $(LIBS)
@@ -192,7 +192,7 @@ ssh-ldap-helper$(EXEEXT): $(LIBCOMPAT) l
 	$(LD) -o $@ ldapconf.o ldapbody.o ldapmisc.o ldap-helper.o sshbuf-getput-basic.o ssherr.o $(LDFLAGS) -lssh -lopenbsd-compat -lfipscheck $(LIBS)
 
 ssh-keyscan$(EXEEXT): $(LIBCOMPAT) libssh.a ssh-keyscan.o roaming_dummy.o
-	$(LD) -o $@ ssh-keyscan.o roaming_dummy.o $(LDFLAGS) -lssh -lopenbsd-compat -lssh $(LIBS)
+	$(LD) -o $@ ssh-keyscan.o roaming_dummy.o $(LDFLAGS) -lssh -lopenbsd-compat -lssh -lfipscheck $(LIBS)
 
 sftp-server$(EXEEXT): $(LIBCOMPAT) libssh.a sftp.o sftp-common.o sftp-server.o sftp-server-main.o
 	$(LD) -o $@ sftp-server.o sftp-common.o sftp-server-main.o $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
Index: openssh-7.1p2/myproposal.h
===================================================================
--- openssh-7.1p2.orig/myproposal.h
+++ openssh-7.1p2/myproposal.h
@@ -138,6 +138,28 @@
 	"hmac-sha1-96," \
 	"hmac-md5-96"
 
+#define KEX_DEFAULT_KEX_FIPS		\
+	KEX_ECDH_METHODS \
+	KEX_SHA256_METHODS \
+	"diffie-hellman-group-exchange-sha1," \
+	"diffie-hellman-group14-sha1"
+#define	KEX_FIPS_ENCRYPT \
+	"aes128-ctr,aes192-ctr,aes256-ctr," \
+	"aes128-cbc,3des-cbc," \
+	"aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se"
+#ifdef HAVE_EVP_SHA256
+#define	KEX_FIPS_MAC \
+	"hmac-sha1," \
+	"hmac-sha2-256," \
+	"hmac-sha2-512," \
+	"hmac-sha1-etm@openssh.com," \
+	"hmac-sha2-256-etm@openssh.com," \
+	"hmac-sha2-512-etm@openssh.com"
+#else
+#define        KEX_FIPS_MAC \
+       "hmac-sha1"
+#endif
+
 #else
 
 #define KEX_SERVER_KEX		\
Index: openssh-7.1p2/readconf.c
===================================================================
--- openssh-7.1p2.orig/readconf.c
+++ openssh-7.1p2/readconf.c
@@ -1905,9 +1905,12 @@ fill_default_options(Options * options)
 		options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
 	if (options->update_hostkeys == -1)
 		options->update_hostkeys = 0;
-	if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 ||
-	    kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 ||
-	    kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 ||
+	if (kex_assemble_names((FIPS_mode() ? KEX_FIPS_ENCRYPT
+	        : KEX_CLIENT_ENCRYPT), &options->ciphers) != 0 ||
+	    kex_assemble_names((FIPS_mode() ? KEX_FIPS_MAC
+	        : KEX_CLIENT_MAC), &options->macs) != 0 ||
+	    kex_assemble_names((FIPS_mode() ? KEX_DEFAULT_KEX_FIPS
+	        : KEX_CLIENT_KEX), &options->kex_algorithms) != 0 ||
 	    kex_assemble_names(KEX_DEFAULT_PK_ALG,
 	    &options->hostbased_key_types) != 0 ||
 	    kex_assemble_names(KEX_DEFAULT_PK_ALG,
Index: openssh-7.1p2/servconf.c
===================================================================
--- openssh-7.1p2.orig/servconf.c
+++ openssh-7.1p2/servconf.c
@@ -354,9 +354,12 @@ fill_default_server_options(ServerOption
 	if (options->fingerprint_hash == -1)
 		options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
 
-	if (kex_assemble_names(KEX_SERVER_ENCRYPT, &options->ciphers) != 0 ||
-	    kex_assemble_names(KEX_SERVER_MAC, &options->macs) != 0 ||
-	    kex_assemble_names(KEX_SERVER_KEX, &options->kex_algorithms) != 0 ||
+	if (kex_assemble_names((FIPS_mode() ? KEX_FIPS_ENCRYPT
+	        : KEX_SERVER_ENCRYPT), &options->ciphers) != 0 ||
+	    kex_assemble_names((FIPS_mode() ? KEX_FIPS_MAC
+	        : KEX_SERVER_MAC), &options->macs) != 0 ||
+	    kex_assemble_names((FIPS_mode() ? KEX_DEFAULT_KEX_FIPS
+	        : KEX_SERVER_KEX), &options->kex_algorithms) != 0 ||
 	    kex_assemble_names(KEX_DEFAULT_PK_ALG,
 	    &options->hostbased_key_types) != 0 ||
 	    kex_assemble_names(KEX_DEFAULT_PK_ALG,
@@ -2316,8 +2319,10 @@ dump_config(ServerOptions *o)
 	/* string arguments */
 	dump_cfg_string(sPidFile, o->pid_file);
 	dump_cfg_string(sXAuthLocation, o->xauth_location);
-	dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT);
-	dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC);
+	dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : FIPS_mode()
+		? KEX_FIPS_ENCRYPT : KEX_SERVER_ENCRYPT);
+	dump_cfg_string(sMacs, o->macs ? o->macs : FIPS_mode()
+		? KEX_FIPS_MAC : KEX_SERVER_MAC);
 	dump_cfg_string(sBanner, o->banner);
 	dump_cfg_string(sForceCommand, o->adm_forced_command);
 	dump_cfg_string(sChrootDirectory, o->chroot_directory);
@@ -2332,8 +2337,8 @@ dump_config(ServerOptions *o)
 	dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command);
 	dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user);
 	dump_cfg_string(sHostKeyAgent, o->host_key_agent);
-	dump_cfg_string(sKexAlgorithms,
-	    o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX);
+	dump_cfg_string(sKexAlgorithms, o->kex_algorithms ? o->kex_algorithms :
+		FIPS_mode() ? KEX_DEFAULT_KEX_FIPS : KEX_SERVER_KEX);
 	dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ?
 	    o->hostbased_key_types : KEX_DEFAULT_PK_ALG);
 	dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ?
Index: openssh-7.1p2/ssh.c
===================================================================
--- openssh-7.1p2.orig/ssh.c
+++ openssh-7.1p2/ssh.c
@@ -75,6 +75,8 @@
 #include <openssl/evp.h>
 #include <openssl/err.h>
 #endif
+#include <openssl/fips.h>
+#include <fipscheck.h>
 #include "openbsd-compat/openssl-compat.h"
 #include "openbsd-compat/sys-queue.h"
 
@@ -522,6 +524,14 @@ main(int ac, char **av)
 	sanitise_stdfd();
 
 	__progname = ssh_get_progname(av[0]);
+        SSLeay_add_all_algorithms();
+	if (access("/etc/system-fips", F_OK) == 0)
+		if (! FIPSCHECK_verify(NULL, NULL)){
+			if (FIPS_mode())
+				fatal("FIPS integrity verification test failed.");
+			else
+				logit("FIPS integrity verification test failed.");
+	}
 
 #ifndef HAVE_SETPROCTITLE
 	/* Prepare for later setproctitle emulation */
@@ -599,6 +609,9 @@ main(int ac, char **av)
 	    "ACD:E:F:GI:KL:MNO:PQ:R:S:TVw:W:XYy")) != -1) {
 		switch (opt) {
 		case '1':
+			if (FIPS_mode()) {
+				fatal("Protocol 1 not allowed in the FIPS mode.");
+			}
 			options.protocol = SSH_PROTO_1;
 			break;
 		case '2':
@@ -940,7 +953,6 @@ main(int ac, char **av)
 	host_arg = xstrdup(host);
 
 #ifdef WITH_OPENSSL
-	OpenSSL_add_all_algorithms();
 	ERR_load_crypto_strings();
 #endif
 
@@ -1114,6 +1126,10 @@ main(int ac, char **av)
 
 	seed_rng();
 
+	if (FIPS_mode()) {
+		logit("FIPS mode initialized");
+	}
+
 	if (options.user == NULL)
 		options.user = xstrdup(pw->pw_name);
 
@@ -1191,6 +1207,12 @@ main(int ac, char **av)
 
 	timeout_ms = options.connection_timeout * 1000;
 
+	if (FIPS_mode()) {
+		options.protocol &= SSH_PROTO_2;
+		if (options.protocol == 0)
+			fatal("Protocol 2 disabled by configuration but required in the FIPS mode.");
+	}
+
 	/* Open a connection to the remote host. */
 	if (ssh_connect(host, addrs, &hostaddr, options.port,
 	    options.address_family, options.connection_attempts,
Index: openssh-7.1p2/sshconnect2.c
===================================================================
--- openssh-7.1p2.orig/sshconnect2.c
+++ openssh-7.1p2/sshconnect2.c
@@ -44,6 +44,8 @@
 #include <vis.h>
 #endif
 
+#include <openssl/fips.h>
+
 #include "openbsd-compat/sys-queue.h"
 
 #include "xmalloc.h"
@@ -170,20 +172,25 @@ ssh_kex2(char *host, struct sockaddr *ho
 
 #ifdef GSSAPI
 	if (options.gss_keyex) {
-		/* Add the GSSAPI mechanisms currently supported on this 
-		 * client to the key exchange algorithm proposal */
-		orig = options.kex_algorithms;
-
-		if (options.gss_trust_dns)
-			gss_host = (char *)get_canonical_hostname(1);
-		else
-			gss_host = host;
-
-		gss = ssh_gssapi_client_mechanisms(gss_host, options.gss_client_identity);
-		if (gss) {
-			debug("Offering GSSAPI proposal: %s", gss);
-			xasprintf(&options.kex_algorithms,
-			    "%s,%s", gss, orig);
+               if (FIPS_mode()) {
+                       logit("Disabling GSSAPIKeyExchange. Not usable in FIPS mode");
+                       options.gss_keyex = 0;
+               } else {
+                       /* Add the GSSAPI mechanisms currently supported on this
+                        * client to the key exchange algorithm proposal */
+                       orig = options.kex_algorithms;
+
+                       if (options.gss_trust_dns)
+                               gss_host = (char *)get_canonical_hostname(1);
+                       else
+                               gss_host = host;
+
+                       gss = ssh_gssapi_client_mechanisms(gss_host, options.gss_client_identity);
+                       if (gss) {
+                               debug("Offering GSSAPI proposal: %s", gss);
+                               xasprintf(&options.kex_algorithms,
+                                   "%s,%s", gss, orig);
+                       }
 		}
 	}
 #endif
Index: openssh-7.1p2/sshd.c
===================================================================
--- openssh-7.1p2.orig/sshd.c
+++ openssh-7.1p2/sshd.c
@@ -66,6 +66,7 @@
 #include <grp.h>
 #include <pwd.h>
 #include <signal.h>
+#include <syslog.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -77,6 +78,8 @@
 #include <openssl/dh.h>
 #include <openssl/bn.h>
 #include <openssl/rand.h>
+#include <openssl/fips.h>
+#include <fipscheck.h>
 #include "openbsd-compat/openssl-compat.h"
 #endif
 
@@ -1536,6 +1539,18 @@ main(int ac, char **av)
 #endif
 	__progname = ssh_get_progname(av[0]);
 
+        SSLeay_add_all_algorithms();
+	if (access("/etc/system-fips", F_OK) == 0)
+		if (! FIPSCHECK_verify(NULL, NULL)) {
+			openlog(__progname, LOG_PID, LOG_AUTHPRIV);
+			if (FIPS_mode()) {
+				syslog(LOG_CRIT, "FIPS integrity verification test failed.");
+				cleanup_exit(255);
+			}
+			else
+				syslog(LOG_INFO, "FIPS integrity verification test failed.");
+			closelog();
+		}
 	/* Save argv. Duplicate so setproctitle emulation doesn't clobber it */
 	saved_argc = ac;
 	rexec_argc = ac;
@@ -1692,7 +1707,7 @@ main(int ac, char **av)
 	else
 		closefrom(REEXEC_DEVCRYPTO_RESERVED_FD);
 
-#ifdef WITH_OPENSSL
+#if 0 /* FIPS */
 	OpenSSL_add_all_algorithms();
 #endif
 
@@ -1888,6 +1903,10 @@ main(int ac, char **av)
 		    sshkey_type(pubkey) : sshkey_ssh_name(pubkey), fp);
 		free(fp);
 	}
+	if ((options.protocol & SSH_PROTO_1) && FIPS_mode()) {
+		logit("Disabling protocol version 1. Not allowed in the FIPS mode.");
+		options.protocol &= ~SSH_PROTO_1;
+	}
 	if ((options.protocol & SSH_PROTO_1) && !sensitive_data.have_ssh1_key) {
 		logit("Disabling protocol version 1. Could not load host key");
 		options.protocol &= ~SSH_PROTO_1;
@@ -2056,6 +2075,10 @@ main(int ac, char **av)
 	/* Reinitialize the log (because of the fork above). */
 	log_init(__progname, options.log_level, options.log_facility, log_stderr);
 
+	if (FIPS_mode()) {
+		logit("FIPS mode initialized");
+	}
+
 	/* Chdir to the root directory so that the current disk can be
 	   unmounted if desired. */
 	if (chdir("/") == -1)
@@ -2654,10 +2677,14 @@ do_ssh2_kex(void)
 	if (strlen(myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS]) == 0)
 		orig = NULL;
 
-	if (options.gss_keyex)
-		gss = ssh_gssapi_server_mechanisms();
-	else
-		gss = NULL;
+	if (options.gss_keyex) {
+		if (FIPS_mode()) {
+			logit("Disabling GSSAPIKeyExchange. Not usable in FIPS mode");
+			options.gss_keyex = 0;
+		} else {
+			gss = ssh_gssapi_server_mechanisms();
+		}
+	}
 
 	if (gss && orig)
 		xasprintf(&newstr, "%s,%s", gss, orig);
Index: openssh-7.1p2/sshkey.c
===================================================================
--- openssh-7.1p2.orig/sshkey.c
+++ openssh-7.1p2/sshkey.c
@@ -35,6 +35,7 @@
 #include <openssl/evp.h>
 #include <openssl/err.h>
 #include <openssl/pem.h>
+#include <openssl/fips.h>
 #endif
 
 #include "crypto_api.h"
@@ -1555,6 +1556,8 @@ rsa_generate_private_key(u_int bits, RSA
 	}
 	if (!BN_set_word(f4, RSA_F4) ||
 	    !RSA_generate_key_ex(private, bits, f4, NULL)) {
+			if (FIPS_mode())
+				logit("%s: the key length might be unsupported by FIPS mode approved key generation method", __func__);
 		ret = SSH_ERR_LIBCRYPTO_ERROR;
 		goto out;
 	}