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Disable ed25519 and ed25519-sk keys in FIPS mode 

Related: rhbz#2087915
This commit is contained in:
Dmitry Belyavskiy 2022-07-11 17:26:00 +02:00
parent 32a82650cf
commit 3990967629
2 changed files with 61 additions and 3 deletions
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62
openssh-7.7p1-fips.patch
View File

@ -397,11 +397,34 @@ diff -up openssh-8.6p1/sshkey.c.fips openssh-8.6p1/sshkey.c
goto out;
if (EVP_PKEY_keygen(ctx, &res) <= 0) {
+ if (FIPS_mode())
+ logit_f("the key length might be unsupported by FIPS mode approved key generation method");
+ if (FIPS_mode())
+ logit_f("the key length might be unsupported by FIPS mode approved key generation method");
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
@@ -2916,6 +2916,11 @@ sshkey_sign(struct sshkey *key,
break;
case KEY_ED25519_SK:
case KEY_ED25519_SK_CERT:
+ if (FIPS_mode()) {
+ logit("Ed25519 keys are not alowed in FIPS mode");
+ return SSH_ERR_INVALID_ARGUMENT;
+ }
+ /* Fallthrough */
case KEY_ECDSA_SK_CERT:
case KEY_ECDSA_SK:
r = sshsk_sign(sk_provider, key, sigp, lenp, data,
@@ -2973,6 +2978,10 @@ sshkey_verify(const struct sshkey *key,
return ssh_ed25519_verify(key, sig, siglen, data, dlen, compat);
case KEY_ED25519_SK:
case KEY_ED25519_SK_CERT:
+ if (FIPS_mode()) {
+ logit("Ed25519 keys are not alowed in FIPS mode");
+ return SSH_ERR_INVALID_ARGUMENT;
+ }
return ssh_ed25519_sk_verify(key, sig, siglen, data, dlen,
compat, detailsp);
#ifdef WITH_XMSS
diff -up openssh-8.6p1/ssh-keygen.c.fips openssh-8.6p1/ssh-keygen.c
--- openssh-8.6p1/ssh-keygen.c.fips 2021-05-06 12:08:36.467926637 +0200
+++ openssh-8.6p1/ssh-keygen.c 2021-05-06 12:08:36.503926916 +0200
@ -412,7 +435,7 @@ diff -up openssh-8.6p1/ssh-keygen.c.fips openssh-8.6p1/ssh-keygen.c
+ if (FIPS_mode()) {
+ if (type == KEY_DSA)
+ fatal("DSA keys are not allowed in FIPS mode");
+ if (type == KEY_ED25519)
+ if (type == KEY_ED25519 || type == KEY_ED25519_SK)
+ fatal("ED25519 keys are not allowed in FIPS mode");
+ }
switch (type) {
@ -523,3 +546,36 @@ diff -up openssh-8.7p1/kexgen.c.fips3 openssh-8.7p1/kexgen.c
break;
default:
r = SSH_ERR_INVALID_ARGUMENT;
diff -up openssh-8.7p1/ssh-ed25519.c.fips3 openssh-8.7p1/ssh-ed25519.c
--- openssh-8.7p1/ssh-ed25519.c.fips3 2022-07-11 16:53:41.428343304 +0200
+++ openssh-8.7p1/ssh-ed25519.c 2022-07-11 16:56:09.284663661 +0200
@@ -24,6 +24,7 @@
#include <string.h>
#include <stdarg.h>
+#include <openssl/crypto.h>
#include "log.h"
#include "sshbuf.h"
@@ -52,6 +53,10 @@ ssh_ed25519_sign(const struct sshkey *ke
key->ed25519_sk == NULL ||
datalen >= INT_MAX - crypto_sign_ed25519_BYTES)
return SSH_ERR_INVALID_ARGUMENT;
+ if (FIPS_mode()) {
+ logit("Ed25519 keys are not alowed in FIPS mode");
+ return SSH_ERR_INVALID_ARGUMENT;
+ }
smlen = slen = datalen + crypto_sign_ed25519_BYTES;
if ((sig = malloc(slen)) == NULL)
return SSH_ERR_ALLOC_FAIL;
@@ -108,6 +113,10 @@ ssh_ed25519_verify(const struct sshkey *
datalen >= INT_MAX - crypto_sign_ed25519_BYTES ||
signature == NULL || signaturelen == 0)
return SSH_ERR_INVALID_ARGUMENT;
+ if (FIPS_mode()) {
+ logit("Ed25519 keys are not alowed in FIPS mode");
+ return SSH_ERR_INVALID_ARGUMENT;
+ }
if ((b = sshbuf_from(signature, signaturelen)) == NULL)
return SSH_ERR_ALLOC_FAIL;

2
openssh.spec
View File

@ -723,6 +723,8 @@ test -f %{sysconfig_anaconda} && \
* Mon Jul 11 2022 Dmitry Belyavskiy <dbelyavs@redhat.com> - 8.7p1-12
- Disable sntrup761x25519-sha512 in FIPS mode
Related: rhbz#2070628
- Disable ed25519 and ed25519-sk keys in FIPS mode
Related: rhbz#2087915
* Mon Jul 11 2022 Zoltan Fridrich <zfridric@redhat.com> - 8.7p1-11
- Fix scp clearing file when src and dest are the same