| |
@@ -0,0 +1,426 @@
|
| |
+ diff -up openssh-8.7p1/compat.c.sshrsacheck openssh-8.7p1/compat.c
|
| |
+ --- openssh-8.7p1/compat.c.sshrsacheck 2023-01-12 13:29:06.338710923 +0100
|
| |
+ +++ openssh-8.7p1/compat.c 2023-01-12 13:29:06.357711165 +0100
|
| |
+ @@ -43,6 +43,7 @@ void
|
| |
+ compat_banner(struct ssh *ssh, const char *version)
|
| |
+ {
|
| |
+ int i;
|
| |
+ + int forbid_ssh_rsa = 0;
|
| |
+ static struct {
|
| |
+ char *pat;
|
| |
+ int bugs;
|
| |
+ @@ -145,16 +146,21 @@ compat_banner(struct ssh *ssh, const cha
|
| |
+ };
|
| |
+
|
| |
+ /* process table, return first match */
|
| |
+ + forbid_ssh_rsa = (ssh->compat & SSH_RH_RSASIGSHA);
|
| |
+ ssh->compat = 0;
|
| |
+ for (i = 0; check[i].pat; i++) {
|
| |
+ if (match_pattern_list(version, check[i].pat, 0) == 1) {
|
| |
+ debug_f("match: %s pat %s compat 0x%08x",
|
| |
+ version, check[i].pat, check[i].bugs);
|
| |
+ ssh->compat = check[i].bugs;
|
| |
+ + if (forbid_ssh_rsa)
|
| |
+ + ssh->compat |= SSH_RH_RSASIGSHA;
|
| |
+ return;
|
| |
+ }
|
| |
+ }
|
| |
+ debug_f("no match: %s", version);
|
| |
+ + if (forbid_ssh_rsa)
|
| |
+ + ssh->compat |= SSH_RH_RSASIGSHA;
|
| |
+ }
|
| |
+
|
| |
+ /* Always returns pointer to allocated memory, caller must free. */
|
| |
+ diff -up openssh-8.7p1/compat.h.sshrsacheck openssh-8.7p1/compat.h
|
| |
+ --- openssh-8.7p1/compat.h.sshrsacheck 2021-08-20 06:03:49.000000000 +0200
|
| |
+ +++ openssh-8.7p1/compat.h 2023-01-12 13:29:06.358711178 +0100
|
| |
+ @@ -30,7 +30,7 @@
|
| |
+ #define SSH_BUG_UTF8TTYMODE 0x00000001
|
| |
+ #define SSH_BUG_SIGTYPE 0x00000002
|
| |
+ #define SSH_BUG_SIGTYPE74 0x00000004
|
| |
+ -/* #define unused 0x00000008 */
|
| |
+ +#define SSH_RH_RSASIGSHA 0x00000008
|
| |
+ #define SSH_OLD_SESSIONID 0x00000010
|
| |
+ /* #define unused 0x00000020 */
|
| |
+ #define SSH_BUG_DEBUG 0x00000040
|
| |
+ diff -up openssh-8.7p1/monitor.c.sshrsacheck openssh-8.7p1/monitor.c
|
| |
+ --- openssh-8.7p1/monitor.c.sshrsacheck 2023-01-20 13:07:54.279676981 +0100
|
| |
+ +++ openssh-8.7p1/monitor.c 2023-01-20 15:01:07.007821379 +0100
|
| |
+ @@ -660,11 +660,12 @@ mm_answer_sign(struct ssh *ssh, int sock
|
| |
+ struct sshkey *key;
|
| |
+ struct sshbuf *sigbuf = NULL;
|
| |
+ u_char *p = NULL, *signature = NULL;
|
| |
+ - char *alg = NULL;
|
| |
+ + char *alg = NULL, *effective_alg;
|
| |
+ size_t datlen, siglen, alglen;
|
| |
+ int r, is_proof = 0;
|
| |
+ u_int keyid, compat;
|
| |
+ const char proof_req[] = "hostkeys-prove-00@openssh.com";
|
| |
+ + const char safe_rsa[] = "rsa-sha2-256";
|
| |
+
|
| |
+ debug3_f("entering");
|
| |
+
|
| |
+ @@ -719,18 +720,30 @@ mm_answer_sign(struct ssh *ssh, int sock
|
| |
+ }
|
| |
+
|
| |
+ if ((key = get_hostkey_by_index(keyid)) != NULL) {
|
| |
+ - if ((r = sshkey_sign(key, &signature, &siglen, p, datlen, alg,
|
| |
+ + if (ssh->compat & SSH_RH_RSASIGSHA && strcmp(alg, "ssh-rsa") == 0
|
| |
+ + && (sshkey_type_plain(key->type) == KEY_RSA)) {
|
| |
+ + effective_alg = safe_rsa;
|
| |
+ + } else {
|
| |
+ + effective_alg = alg;
|
| |
+ + }
|
| |
+ + if ((r = sshkey_sign(key, &signature, &siglen, p, datlen, effective_alg,
|
| |
+ options.sk_provider, NULL, compat)) != 0)
|
| |
+ fatal_fr(r, "sign");
|
| |
+ } else if ((key = get_hostkey_public_by_index(keyid, ssh)) != NULL &&
|
| |
+ auth_sock > 0) {
|
| |
+ + if (ssh->compat & SSH_RH_RSASIGSHA && strcmp(alg, "ssh-rsa") == 0
|
| |
+ + && (sshkey_type_plain(key->type) == KEY_RSA)) {
|
| |
+ + effective_alg = safe_rsa;
|
| |
+ + } else {
|
| |
+ + effective_alg = alg;
|
| |
+ + }
|
| |
+ if ((r = ssh_agent_sign(auth_sock, key, &signature, &siglen,
|
| |
+ - p, datlen, alg, compat)) != 0)
|
| |
+ + p, datlen, effective_alg, compat)) != 0)
|
| |
+ fatal_fr(r, "agent sign");
|
| |
+ } else
|
| |
+ fatal_f("no hostkey from index %d", keyid);
|
| |
+
|
| |
+ - debug3_f("%s %s signature len=%zu", alg,
|
| |
+ + debug3_f("%s (effective: %s) %s signature len=%zu", alg, effective_alg,
|
| |
+ is_proof ? "hostkey proof" : "KEX", siglen);
|
| |
+
|
| |
+ sshbuf_reset(m);
|
| |
+ diff -up openssh-8.7p1/regress/cert-userkey.sh.sshrsacheck openssh-8.7p1/regress/cert-userkey.sh
|
| |
+ --- openssh-8.7p1/regress/cert-userkey.sh.sshrsacheck 2023-01-25 14:26:52.885963113 +0100
|
| |
+ +++ openssh-8.7p1/regress/cert-userkey.sh 2023-01-25 14:27:25.757219800 +0100
|
| |
+ @@ -7,7 +7,8 @@ rm -f $OBJ/authorized_keys_$USER $OBJ/us
|
| |
+ cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak
|
| |
+ cp $OBJ/ssh_proxy $OBJ/ssh_proxy_bak
|
| |
+
|
| |
+ -PLAIN_TYPES=`$SSH -Q key-plain | maybe_filter_sk | sed 's/^ssh-dss/ssh-dsa/;s/^ssh-//'`
|
| |
+ +#ssh-dss keys are incompatible with DEFAULT crypto policy
|
| |
+ +PLAIN_TYPES=`$SSH -Q key-plain | maybe_filter_sk | grep -v 'ssh-dss' | sed 's/^ssh-dss/ssh-dsa/;s/^ssh-//'`
|
| |
+ EXTRA_TYPES=""
|
| |
+ rsa=""
|
| |
+
|
| |
+ diff -up openssh-8.7p1/regress/Makefile.sshrsacheck openssh-8.7p1/regress/Makefile
|
| |
+ --- openssh-8.7p1/regress/Makefile.sshrsacheck 2023-01-20 13:07:54.169676051 +0100
|
| |
+ +++ openssh-8.7p1/regress/Makefile 2023-01-20 13:07:54.290677074 +0100
|
| |
+ @@ -2,7 +2,8 @@
|
| |
+
|
| |
+ tests: prep file-tests t-exec unit
|
| |
+
|
| |
+ -REGRESS_TARGETS= t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12
|
| |
+ +#ssh-dss tests will not pass on DEFAULT crypto-policy because of SHA1, skipping
|
| |
+ +REGRESS_TARGETS= t1 t2 t3 t4 t5 t7 t8 t9 t10 t11 t12
|
| |
+
|
| |
+ # File based tests
|
| |
+ file-tests: $(REGRESS_TARGETS)
|
| |
+ diff -up openssh-8.7p1/regress/test-exec.sh.sshrsacheck openssh-8.7p1/regress/test-exec.sh
|
| |
+ --- openssh-8.7p1/regress/test-exec.sh.sshrsacheck 2023-01-25 14:24:54.778040819 +0100
|
| |
+ +++ openssh-8.7p1/regress/test-exec.sh 2023-01-25 14:26:39.500858590 +0100
|
| |
+ @@ -581,8 +581,9 @@ maybe_filter_sk() {
|
| |
+ fi
|
| |
+ }
|
| |
+
|
| |
+ -SSH_KEYTYPES=`$SSH -Q key-plain | maybe_filter_sk`
|
| |
+ -SSH_HOSTKEY_TYPES=`$SSH -Q key-plain | maybe_filter_sk`
|
| |
+ +#ssh-dss keys are incompatible with DEFAULT crypto policy
|
| |
+ +SSH_KEYTYPES=`$SSH -Q key-plain | maybe_filter_sk | grep -v 'ssh-dss'`
|
| |
+ +SSH_HOSTKEY_TYPES=`$SSH -Q key-plain | maybe_filter_sk | grep -v 'ssh-dss'`
|
| |
+
|
| |
+ for t in ${SSH_KEYTYPES}; do
|
| |
+ # generate user key
|
| |
+ diff -up openssh-8.7p1/regress/unittests/kex/test_kex.c.sshrsacheck openssh-8.7p1/regress/unittests/kex/test_kex.c
|
| |
+ --- openssh-8.7p1/regress/unittests/kex/test_kex.c.sshrsacheck 2023-01-26 13:34:52.645743677 +0100
|
| |
+ +++ openssh-8.7p1/regress/unittests/kex/test_kex.c 2023-01-26 13:36:56.220745823 +0100
|
| |
+ @@ -97,7 +97,8 @@ do_kex_with_key(char *kex, int keytype,
|
| |
+ memcpy(kex_params.proposal, myproposal, sizeof(myproposal));
|
| |
+ if (kex != NULL)
|
| |
+ kex_params.proposal[PROPOSAL_KEX_ALGS] = kex;
|
| |
+ - keyname = strdup(sshkey_ssh_name(private));
|
| |
+ + keyname = (strcmp(sshkey_ssh_name(private), "ssh-rsa")) ?
|
| |
+ + strdup(sshkey_ssh_name(private)) : strdup("rsa-sha2-256");
|
| |
+ ASSERT_PTR_NE(keyname, NULL);
|
| |
+ kex_params.proposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = keyname;
|
| |
+ ASSERT_INT_EQ(ssh_init(&client, 0, &kex_params), 0);
|
| |
+ @@ -180,7 +181,7 @@ do_kex(char *kex)
|
| |
+ {
|
| |
+ #ifdef WITH_OPENSSL
|
| |
+ do_kex_with_key(kex, KEY_RSA, 2048);
|
| |
+ - do_kex_with_key(kex, KEY_DSA, 1024);
|
| |
+ + /* do_kex_with_key(kex, KEY_DSA, 1024); */
|
| |
+ #ifdef OPENSSL_HAS_ECC
|
| |
+ do_kex_with_key(kex, KEY_ECDSA, 256);
|
| |
+ #endif /* OPENSSL_HAS_ECC */
|
| |
+ diff -up openssh-8.7p1/regress/unittests/sshkey/test_file.c.sshrsacheck openssh-8.7p1/regress/unittests/sshkey/test_file.c
|
| |
+ --- openssh-8.7p1/regress/unittests/sshkey/test_file.c.sshrsacheck 2023-01-26 12:04:55.946343408 +0100
|
| |
+ +++ openssh-8.7p1/regress/unittests/sshkey/test_file.c 2023-01-26 12:06:35.235164432 +0100
|
| |
+ @@ -110,6 +110,7 @@ sshkey_file_tests(void)
|
| |
+ sshkey_free(k2);
|
| |
+ TEST_DONE();
|
| |
+
|
| |
+ + /* Skip this test, SHA1 signatures are not supported
|
| |
+ TEST_START("load RSA cert with SHA1 signature");
|
| |
+ ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1_sha1"), &k2), 0);
|
| |
+ ASSERT_PTR_NE(k2, NULL);
|
| |
+ @@ -117,7 +118,7 @@ sshkey_file_tests(void)
|
| |
+ ASSERT_INT_EQ(sshkey_equal_public(k1, k2), 1);
|
| |
+ ASSERT_STRING_EQ(k2->cert->signature_type, "ssh-rsa");
|
| |
+ sshkey_free(k2);
|
| |
+ - TEST_DONE();
|
| |
+ + TEST_DONE(); */
|
| |
+
|
| |
+ TEST_START("load RSA cert with SHA512 signature");
|
| |
+ ASSERT_INT_EQ(sshkey_load_cert(test_data_file("rsa_1_sha512"), &k2), 0);
|
| |
+ diff -up openssh-8.7p1/regress/unittests/sshkey/test_fuzz.c.sshrsacheck openssh-8.7p1/regress/unittests/sshkey/test_fuzz.c
|
| |
+ --- openssh-8.7p1/regress/unittests/sshkey/test_fuzz.c.sshrsacheck 2023-01-26 12:10:37.533168013 +0100
|
| |
+ +++ openssh-8.7p1/regress/unittests/sshkey/test_fuzz.c 2023-01-26 12:15:35.637631860 +0100
|
| |
+ @@ -333,13 +333,14 @@ sshkey_fuzz_tests(void)
|
| |
+ TEST_DONE();
|
| |
+
|
| |
+ #ifdef WITH_OPENSSL
|
| |
+ + /* Skip this test, SHA1 signatures are not supported
|
| |
+ TEST_START("fuzz RSA sig");
|
| |
+ buf = load_file("rsa_1");
|
| |
+ ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
|
| |
+ sshbuf_free(buf);
|
| |
+ sig_fuzz(k1, "ssh-rsa");
|
| |
+ sshkey_free(k1);
|
| |
+ - TEST_DONE();
|
| |
+ + TEST_DONE();*/
|
| |
+
|
| |
+ TEST_START("fuzz RSA SHA256 sig");
|
| |
+ buf = load_file("rsa_1");
|
| |
+ @@ -357,6 +358,7 @@ sshkey_fuzz_tests(void)
|
| |
+ sshkey_free(k1);
|
| |
+ TEST_DONE();
|
| |
+
|
| |
+ + /* Skip this test, SHA1 signatures are not supported
|
| |
+ TEST_START("fuzz DSA sig");
|
| |
+ buf = load_file("dsa_1");
|
| |
+ ASSERT_INT_EQ(sshkey_parse_private_fileblob(buf, "", &k1, NULL), 0);
|
| |
+ @@ -364,6 +366,7 @@ sshkey_fuzz_tests(void)
|
| |
+ sig_fuzz(k1, NULL);
|
| |
+ sshkey_free(k1);
|
| |
+ TEST_DONE();
|
| |
+ + */
|
| |
+
|
| |
+ #ifdef OPENSSL_HAS_ECC
|
| |
+ TEST_START("fuzz ECDSA sig");
|
| |
+ diff -up openssh-8.7p1/regress/unittests/sshkey/test_sshkey.c.sshrsacheck openssh-8.7p1/regress/unittests/sshkey/test_sshkey.c
|
| |
+ --- openssh-8.7p1/regress/unittests/sshkey/test_sshkey.c.sshrsacheck 2023-01-26 11:02:52.339413463 +0100
|
| |
+ +++ openssh-8.7p1/regress/unittests/sshkey/test_sshkey.c 2023-01-26 11:58:42.324253896 +0100
|
| |
+ @@ -60,6 +60,9 @@ build_cert(struct sshbuf *b, struct sshk
|
| |
+ u_char *sigblob;
|
| |
+ size_t siglen;
|
| |
+
|
| |
+ + /* ssh-rsa implies SHA1, forbidden in DEFAULT cp */
|
| |
+ + int expected = (sig_alg == NULL || strcmp(sig_alg, "ssh-rsa") == 0) ? SSH_ERR_LIBCRYPTO_ERROR : 0;
|
| |
+ +
|
| |
+ ca_buf = sshbuf_new();
|
| |
+ ASSERT_PTR_NE(ca_buf, NULL);
|
| |
+ ASSERT_INT_EQ(sshkey_putb(ca_key, ca_buf), 0);
|
| |
+ @@ -101,8 +104,9 @@ build_cert(struct sshbuf *b, struct sshk
|
| |
+ ASSERT_INT_EQ(sshbuf_put_string(b, NULL, 0), 0); /* reserved */
|
| |
+ ASSERT_INT_EQ(sshbuf_put_stringb(b, ca_buf), 0); /* signature key */
|
| |
+ ASSERT_INT_EQ(sshkey_sign(sign_key, &sigblob, &siglen,
|
| |
+ - sshbuf_ptr(b), sshbuf_len(b), sig_alg, NULL, NULL, 0), 0);
|
| |
+ - ASSERT_INT_EQ(sshbuf_put_string(b, sigblob, siglen), 0); /* signature */
|
| |
+ + sshbuf_ptr(b), sshbuf_len(b), sig_alg, NULL, NULL, 0), expected);
|
| |
+ + if (expected == 0)
|
| |
+ + ASSERT_INT_EQ(sshbuf_put_string(b, sigblob, siglen), 0); /* signature */
|
| |
+
|
| |
+ free(sigblob);
|
| |
+ sshbuf_free(ca_buf);
|
| |
+ @@ -119,16 +123,22 @@ signature_test(struct sshkey *k, struct
|
| |
+ {
|
| |
+ size_t len;
|
| |
+ u_char *sig;
|
| |
+ + /* ssh-rsa implies SHA1, forbidden in DEFAULT cp */
|
| |
+ + int expected = (sig_alg && strcmp(sig_alg, "ssh-rsa") == 0) ? SSH_ERR_LIBCRYPTO_ERROR : 0;
|
| |
+ + if (k && (sshkey_type_plain(k->type) == KEY_DSA || sshkey_type_plain(k->type) == KEY_DSA_CERT))
|
| |
+ + expected = SSH_ERR_LIBCRYPTO_ERROR;
|
| |
+
|
| |
+ ASSERT_INT_EQ(sshkey_sign(k, &sig, &len, d, l, sig_alg,
|
| |
+ - NULL, NULL, 0), 0);
|
| |
+ - ASSERT_SIZE_T_GT(len, 8);
|
| |
+ - ASSERT_PTR_NE(sig, NULL);
|
| |
+ - ASSERT_INT_EQ(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ - ASSERT_INT_NE(sshkey_verify(bad, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ - /* Fuzz test is more comprehensive, this is just a smoke test */
|
| |
+ - sig[len - 5] ^= 0x10;
|
| |
+ - ASSERT_INT_NE(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ + NULL, NULL, 0), expected);
|
| |
+ + if (expected == 0) {
|
| |
+ + ASSERT_SIZE_T_GT(len, 8);
|
| |
+ + ASSERT_PTR_NE(sig, NULL);
|
| |
+ + ASSERT_INT_EQ(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ + ASSERT_INT_NE(sshkey_verify(bad, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ + /* Fuzz test is more comprehensive, this is just a smoke test */
|
| |
+ + sig[len - 5] ^= 0x10;
|
| |
+ + ASSERT_INT_NE(sshkey_verify(k, sig, len, d, l, NULL, 0, NULL), 0);
|
| |
+ + }
|
| |
+ free(sig);
|
| |
+ }
|
| |
+
|
| |
+ @@ -514,7 +524,7 @@ sshkey_tests(void)
|
| |
+ ASSERT_INT_EQ(sshkey_load_public(test_data_file("rsa_1.pub"), &k2,
|
| |
+ NULL), 0);
|
| |
+ k3 = get_private("rsa_1");
|
| |
+ - build_cert(b, k2, "ssh-rsa-cert-v01@openssh.com", k3, k1, NULL);
|
| |
+ + build_cert(b, k2, "ssh-rsa-cert-v01@openssh.com", k3, k1, "rsa-sha2-256");
|
| |
+ ASSERT_INT_EQ(sshkey_from_blob(sshbuf_ptr(b), sshbuf_len(b), &k4),
|
| |
+ SSH_ERR_KEY_CERT_INVALID_SIGN_KEY);
|
| |
+ ASSERT_PTR_EQ(k4, NULL);
|
| |
+ diff -up openssh-8.7p1/regress/unittests/sshsig/tests.c.sshrsacheck openssh-8.7p1/regress/unittests/sshsig/tests.c
|
| |
+ --- openssh-8.7p1/regress/unittests/sshsig/tests.c.sshrsacheck 2023-01-26 12:19:23.659513651 +0100
|
| |
+ +++ openssh-8.7p1/regress/unittests/sshsig/tests.c 2023-01-26 12:20:28.021044803 +0100
|
| |
+ @@ -102,9 +102,11 @@ tests(void)
|
| |
+ check_sig("rsa.pub", "rsa.sig", msg, namespace);
|
| |
+ TEST_DONE();
|
| |
+
|
| |
+ + /* Skip this test, SHA1 signatures are not supported
|
| |
+ TEST_START("check DSA signature");
|
| |
+ check_sig("dsa.pub", "dsa.sig", msg, namespace);
|
| |
+ TEST_DONE();
|
| |
+ + */
|
| |
+
|
| |
+ #ifdef OPENSSL_HAS_ECC
|
| |
+ TEST_START("check ECDSA signature");
|
| |
+ diff -up openssh-8.7p1/serverloop.c.sshrsacheck openssh-8.7p1/serverloop.c
|
| |
+ --- openssh-8.7p1/serverloop.c.sshrsacheck 2023-01-12 14:57:08.118400073 +0100
|
| |
+ +++ openssh-8.7p1/serverloop.c 2023-01-12 14:59:17.330470518 +0100
|
| |
+ @@ -737,6 +737,10 @@ server_input_hostkeys_prove(struct ssh *
|
| |
+ else if (ssh->kex->flags & KEX_RSA_SHA2_256_SUPPORTED)
|
| |
+ sigalg = "rsa-sha2-256";
|
| |
+ }
|
| |
+ + if (ssh->compat & SSH_RH_RSASIGSHA && sigalg == NULL) {
|
| |
+ + sigalg = "rsa-sha2-512";
|
| |
+ + debug3_f("SHA1 signature is not supported, falling back to %s", sigalg);
|
| |
+ + }
|
| |
+ debug3_f("sign %s key (index %d) using sigalg %s",
|
| |
+ sshkey_type(key), ndx, sigalg == NULL ? "default" : sigalg);
|
| |
+ if ((r = sshbuf_put_cstring(sigbuf,
|
| |
+ diff -up openssh-8.7p1/sshconnect2.c.sshrsacheck openssh-8.7p1/sshconnect2.c
|
| |
+ --- openssh-8.7p1/sshconnect2.c.sshrsacheck 2023-01-25 15:33:29.140353651 +0100
|
| |
+ +++ openssh-8.7p1/sshconnect2.c 2023-01-25 15:59:34.225364883 +0100
|
| |
+ @@ -1461,6 +1464,14 @@ identity_sign(struct identity *id, u_cha
|
| |
+ retried = 1;
|
| |
+ goto retry_pin;
|
| |
+ }
|
| |
+ + if ((r == SSH_ERR_LIBCRYPTO_ERROR) && strcmp("ssh-rsa", alg)) {
|
| |
+ + char rsa_safe_alg[] = "rsa-sha2-512";
|
| |
+ + debug3_f("trying to fallback to algorithm %s", rsa_safe_alg);
|
| |
+ +
|
| |
+ + if ((r = sshkey_sign(sign_key, sigp, lenp, data, datalen,
|
| |
+ + rsa_safe_alg, options.sk_provider, pin, compat)) != 0)
|
| |
+ + debug_fr(r, "sshkey_sign - RSA fallback");
|
| |
+ + }
|
| |
+ goto out;
|
| |
+ }
|
| |
+
|
| |
+ diff -up openssh-8.7p1/sshd.c.sshrsacheck openssh-8.7p1/sshd.c
|
| |
+ --- openssh-8.7p1/sshd.c.sshrsacheck 2023-01-12 13:29:06.355711140 +0100
|
| |
+ +++ openssh-8.7p1/sshd.c 2023-01-12 13:29:06.358711178 +0100
|
| |
+ @@ -1640,6 +1651,7 @@ main(int ac, char **av)
|
| |
+ int keytype;
|
| |
+ Authctxt *authctxt;
|
| |
+ struct connection_info *connection_info = NULL;
|
| |
+ + int forbid_ssh_rsa = 0;
|
| |
+
|
| |
+ #ifdef HAVE_SECUREWARE
|
| |
+ (void)set_auth_parameters(ac, av);
|
| |
+ @@ -1938,6 +1950,33 @@ main(int ac, char **av)
|
| |
+ key = NULL;
|
| |
+ continue;
|
| |
+ }
|
| |
+ + if (key && (sshkey_type_plain(key->type) == KEY_RSA || sshkey_type_plain(key->type) == KEY_RSA_CERT)) {
|
| |
+ + size_t sign_size = 0;
|
| |
+ + u_char *tmp = NULL;
|
| |
+ + u_char data[] = "Test SHA1 vector";
|
| |
+ + int res;
|
| |
+ +
|
| |
+ + res = sshkey_sign(key, &tmp, &sign_size, data, sizeof(data), NULL, NULL, NULL, 0);
|
| |
+ + free(tmp);
|
| |
+ + if (res == SSH_ERR_LIBCRYPTO_ERROR) {
|
| |
+ + verbose_f("sshd: SHA1 in signatures is disabled for RSA keys");
|
| |
+ + forbid_ssh_rsa = 1;
|
| |
+ + }
|
| |
+ + }
|
| |
+ + if (key && (sshkey_type_plain(key->type) == KEY_DSA || sshkey_type_plain(key->type) == KEY_DSA_CERT)) {
|
| |
+ + size_t sign_size = 0;
|
| |
+ + u_char *tmp = NULL;
|
| |
+ + u_char data[] = "Test SHA1 vector";
|
| |
+ + int res;
|
| |
+ +
|
| |
+ + res = sshkey_sign(key, &tmp, &sign_size, data, sizeof(data), NULL, NULL, NULL, 0);
|
| |
+ + free(tmp);
|
| |
+ + if (res == SSH_ERR_LIBCRYPTO_ERROR) {
|
| |
+ + logit_f("sshd: ssh-dss is disabled, skipping key file %s", options.host_key_files[i]);
|
| |
+ + key = NULL;
|
| |
+ + continue;
|
| |
+ + }
|
| |
+ + }
|
| |
+ if (sshkey_is_sk(key) &&
|
| |
+ key->sk_flags & SSH_SK_USER_PRESENCE_REQD) {
|
| |
+ debug("host key %s requires user presence, ignoring",
|
| |
+ @@ -2275,6 +2306,9 @@ main(int ac, char **av)
|
| |
+
|
| |
+ check_ip_options(ssh);
|
| |
+
|
| |
+ + if (forbid_ssh_rsa)
|
| |
+ + ssh->compat |= SSH_RH_RSASIGSHA;
|
| |
+ +
|
| |
+ /* Prepare the channels layer */
|
| |
+ channel_init_channels(ssh);
|
| |
+ channel_set_af(ssh, options.address_family);
|
| |
+ diff -Nur openssh-8.7p1/ssh-keygen.c openssh-8.7p1_patched/ssh-keygen.c
|
| |
+ --- openssh-8.7p1/ssh-keygen.c 2023-01-18 17:41:47.894515779 +0100
|
| |
+ +++ openssh-8.7p1_patched/ssh-keygen.c 2023-01-18 17:41:44.500488818 +0100
|
| |
+ @@ -491,6 +491,8 @@
|
| |
+ BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
|
| |
+ BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
|
| |
+ BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
|
| |
+ + char rsa_safe_alg[] = "rsa-sha2-256";
|
| |
+ + char *alg = NULL;
|
| |
+
|
| |
+ if ((r = sshbuf_get_u32(b, &magic)) != 0)
|
| |
+ fatal_fr(r, "parse magic");
|
| |
+ @@ -590,6 +592,7 @@ do_convert_private_ssh2(struct sshbuf *b
|
| |
+ if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
|
| |
+ fatal_fr(r, "generate RSA parameters");
|
| |
+ BN_clear_free(rsa_iqmp);
|
| |
+ + alg = rsa_safe_alg;
|
| |
+ break;
|
| |
+ }
|
| |
+ rlen = sshbuf_len(b);
|
| |
+ @@ -598,9 +601,9 @@ do_convert_private_ssh2(struct sshbuf *b
|
| |
+
|
| |
+ /* try the key */
|
| |
+ if (sshkey_sign(key, &sig, &slen, data, sizeof(data),
|
| |
+ - NULL, NULL, NULL, 0) != 0 ||
|
| |
+ + alg, NULL, NULL, 0) != 0 ||
|
| |
+ sshkey_verify(key, sig, slen, data, sizeof(data),
|
| |
+ - NULL, 0, NULL) != 0) {
|
| |
+ + alg, 0, NULL) != 0) {
|
| |
+ sshkey_free(key);
|
| |
+ free(sig);
|
| |
+ return NULL;
|
| |
+ diff -up openssh-8.7p1/ssh-rsa.c.sshrsacheck openssh-8.7p1/ssh-rsa.c
|
| |
+ --- openssh-8.7p1/ssh-rsa.c.sshrsacheck 2023-01-20 13:07:54.180676144 +0100
|
| |
+ +++ openssh-8.7p1/ssh-rsa.c 2023-01-20 13:07:54.290677074 +0100
|
| |
+ @@ -254,7 +254,8 @@ ssh_rsa_verify(const struct sshkey *key,
|
| |
+ ret = SSH_ERR_INVALID_ARGUMENT;
|
| |
+ goto out;
|
| |
+ }
|
| |
+ - if (hash_alg != want_alg) {
|
| |
+ + if (hash_alg != want_alg && want_alg != SSH_DIGEST_SHA1) {
|
| |
+ + debug_f("Unexpected digest algorithm: got %d, wanted %d", hash_alg, want_alg);
|
| |
+ ret = SSH_ERR_SIGNATURE_INVALID;
|
| |
+ goto out;
|
| |
+ }
|
| |
This PR merges the upstream changes from the https://gitlab.com/redhat/centos-stream/rpms/openssh.git c9s branch to prepare version 8.7p1-34.7