forked from rpms/openssh
58 lines
1.7 KiB
Diff
58 lines
1.7 KiB
Diff
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--- compat.h.orig 2020-10-05 10:09:02.953505129 -0700
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+++ compat.h 2020-10-05 10:10:17.587733113 -0700
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@@ -34,7 +34,7 @@
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#define SSH_BUG_UTF8TTYMODE 0x00000001
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#define SSH_BUG_SIGTYPE 0x00000002
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-/* #define unused 0x00000004 */
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+#define SSH_BUG_SIGTYPE74 0x00000004
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/* #define unused 0x00000008 */
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#define SSH_OLD_SESSIONID 0x00000010
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/* #define unused 0x00000020 */
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--- compat.c.orig 2020-10-05 10:25:02.088720562 -0700
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+++ compat.c 2020-10-05 10:13:11.637282492 -0700
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@@ -65,11 +65,12 @@
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{ "OpenSSH_6.5*,"
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"OpenSSH_6.6*", SSH_NEW_OPENSSH|SSH_BUG_CURVE25519PAD|
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SSH_BUG_SIGTYPE},
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+ { "OpenSSH_7.4*", SSH_NEW_OPENSSH|SSH_BUG_SIGTYPE|
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+ SSH_BUG_SIGTYPE74},
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{ "OpenSSH_7.0*,"
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"OpenSSH_7.1*,"
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"OpenSSH_7.2*,"
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"OpenSSH_7.3*,"
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- "OpenSSH_7.4*,"
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"OpenSSH_7.5*,"
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"OpenSSH_7.6*,"
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"OpenSSH_7.7*", SSH_NEW_OPENSSH|SSH_BUG_SIGTYPE},
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--- sshconnect2.c.orig 2020-09-26 07:26:37.618010545 -0700
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+++ sshconnect2.c 2020-10-05 10:47:22.116315148 -0700
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@@ -1305,6 +1305,26 @@
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break;
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}
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free(oallowed);
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+ /*
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+ * OpenSSH 7.4 supports SHA2 sig types, but fails to indicate its
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+ * support. For that release, check the local policy against the
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+ * SHA2 signature types.
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+ */
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+ if (alg == NULL &&
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+ (key->type == KEY_RSA && (datafellows & SSH_BUG_SIGTYPE74))) {
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+ oallowed = allowed = xstrdup(options.pubkey_key_types);
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+ while ((cp = strsep(&allowed, ",")) != NULL) {
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+ if (sshkey_type_from_name(cp) != key->type)
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+ continue;
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+ tmp = match_list(sshkey_sigalg_by_name(cp), "rsa-sha2-256,rsa-sha2-512", NULL);
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+ if (tmp != NULL)
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+ alg = xstrdup(cp);
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+ free(tmp);
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+ if (alg != NULL)
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+ break;
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+ }
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+ free(oallowed);
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+ }
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return alg;
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}
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