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diff -u -p -r1.166 auth2.c
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--- a/auth2.c 8 Mar 2023 04:43:12 -0000 1.166
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+++ b/auth2.c 28 Aug 2023 08:32:44 -0000
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@@ -208,6 +208,7 @@ input_service_request(int type, u_int32_
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}
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#define MIN_FAIL_DELAY_SECONDS 0.005
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+#define MAX_FAIL_DELAY_SECONDS 5.0
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static double
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user_specific_delay(const char *user)
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{
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@@ -233,6 +234,12 @@ ensure_minimum_time_since(double start,
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struct timespec ts;
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double elapsed = monotime_double() - start, req = seconds, remain;
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+ if (elapsed > MAX_FAIL_DELAY_SECONDS) {
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+ debug3_f("elapsed %0.3lfms exceeded the max delay "
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+ "requested %0.3lfms)", elapsed*1000, req*1000);
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+ return;
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+ }
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+
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/* if we've already passed the requested time, scale up */
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while ((remain = seconds - elapsed) < 0.0)
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seconds *= 2;
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@@ -317,7 +324,7 @@ input_userauth_request(int type, u_int32
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debug2("input_userauth_request: try method %s", method);
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authenticated = m->userauth(ssh);
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}
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- if (!authctxt->authenticated)
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+ if (!authctxt->authenticated && strcmp(method, "none") != 0)
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ensure_minimum_time_since(tstart,
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user_specific_delay(authctxt->user));
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userauth_finish(ssh, authenticated, method, NULL);
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