File 0552-Gracefully-handle-bad-validity-dates-in-pu... of Package erlang

Overview Repositories Revisions Requests Users Attributes Meta

File 0552-Gracefully-handle-bad-validity-dates-in-public_key-p.patch of Package erlang (Revision b1ddc78860c1f178c6361caad002e77d)

Currently displaying revision b1ddc78860c1f178c6361caad002e77d , Show latest

From 97d4036194846d880295398f7ceb81a86c750cda Mon Sep 17 00:00:00 2001
From: Andrea Santambrogio <andreasanta@meta.com>
Date: Wed, 18 Oct 2023 16:31:30 +0200
Subject: [PATCH] Gracefully handle bad validity dates in
 public_key:pkix_path_validation

---
 lib/public_key/doc/src/public_key.xml         |  3 +
 lib/public_key/src/pubkey_cert.erl            | 44 +++++++--
 lib/public_key/src/public_key.erl             |  2 +-
 lib/public_key/test/public_key_SUITE.erl      | 41 ++++++++-
 .../bad_date_certchain.pem                    | 89 +++++++++++++++++++
 5 files changed, 167 insertions(+), 12 deletions(-)
 create mode 100644 lib/public_key/test/public_key_SUITE_data/bad_date_certchain.pem

diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml
index c726b17595..5fc2420fab 100644
--- a/lib/public_key/doc/src/public_key.xml
+++ b/lib/public_key/doc/src/public_key.xml
@@ -641,6 +641,9 @@ fun(OtpCert :: #'OTPCertificate'{},
 	<tag>{revoked, crl_reason()}</tag>
 	<item>Certificate has been revoked.</item>
 
+ <tag>invalid_validity_dates</tag>
+ <item>The validity section of the X.509 certificate(s) contains invalid date formats not matching the RFC.</item>
+
 	<tag>atom()</tag>
 	<item>Application-specific error reason that is to be checked by the <c>verify_fun</c>.</item>
 </taglist>
diff --git a/lib/public_key/src/pubkey_cert.erl b/lib/public_key/src/pubkey_cert.erl
index 879e4e7fd1..4a91335e0c 100644
--- a/lib/public_key/src/pubkey_cert.erl
+++ b/lib/public_key/src/pubkey_cert.erl
@@ -148,19 +148,47 @@ validate_policy_tree(OtpCert,
 %% current time.
 %%--------------------------------------------------------------------
 validate_time(OtpCert, UserState, VerifyFun) ->
+ % Parse and check validity of the certificate dates, and if it fails, invoke `verify_fun` to
+ % hand over control to the caller in order to decide what to do.
+ case parse_and_check_validity_dates(OtpCert) of
+ expired ->
+ % Certificate has correctly formatted dates but it's expired
+ verify_fun(OtpCert, {bad_cert, cert_expired}, UserState, VerifyFun);
+ error ->
+ % Certificate has incorrectly formatted dates, attempt to delegate decision to app function
+ verify_fun(OtpCert, {bad_cert, invalid_validity_dates}, UserState, VerifyFun);
+ % Validation succeded and certificate is not expired, no new state needed
+ ok ->
+ UserState
+ end.
+
+-spec parse_and_check_validity_dates(#'OTPCertificate'{}) -> ok | expired | error.
+%%
+%% Description: Determines if the passed certificate consains correctly
+%% formatted dates in the validity field. If so, it checks if the certificate
+%% is not expired. Otherwise, it returns error.
+%%--------------------------------------------------------------------
+parse_and_check_validity_dates(OtpCert) ->
 TBSCert = OtpCert#'OTPCertificate'.tbsCertificate,
 {'Validity', NotBeforeStr, NotAfterStr}
 	= TBSCert#'OTPTBSCertificate'.validity,
 Now = calendar:datetime_to_gregorian_seconds(calendar:universal_time()),
- NotBefore = time_str_2_gregorian_sec(notBefore, NotBeforeStr),
- NotAfter = time_str_2_gregorian_sec(notAfter, NotAfterStr),
-
- case ((NotBefore =< Now) and (Now =< NotAfter)) of
-	true ->
-	 UserState;
-	false ->
-	 verify_fun(OtpCert, {bad_cert, cert_expired}, UserState, VerifyFun)
+ try
+ NotBefore = time_str_2_gregorian_sec(notBefore, NotBeforeStr),
+ NotAfter = time_str_2_gregorian_sec(notAfter, NotAfterStr),
+ 
+ % Expiration check
+ if
+ ((NotBefore =< Now) and (Now =< NotAfter)) -> ok;
+ true -> expired
+ end
+
+ % "error:function_clause" is thrown by time_str_2_gregorian_sec if the date format is not valid
+ % verify_fun only throws exceptions 
+ catch error:function_clause -> 
+ error
 end.
+
 %%--------------------------------------------------------------------
 -spec validate_issuer(#'OTPCertificate'{}, term(), term(), fun()) -> term() | no_return().
 %%
diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl
index c05c307ae4..858860e29c 100644
--- a/lib/public_key/src/public_key.erl
+++ b/lib/public_key/src/public_key.erl
@@ -163,7 +163,7 @@
 -type cert_id() :: {SerialNr::integer(), issuer_name()} .
 -type issuer_name() :: {rdnSequence,[[#'AttributeTypeAndValue'{}]]} .
 -type bad_cert_reason() :: cert_expired | invalid_issuer | invalid_signature | name_not_permitted | missing_basic_constraint | invalid_key_usage | duplicate_cert_in_path |
- {'policy_requirement_not_met', term()} | {'invalid_policy_mapping', term()} | {revoked, crl_reason()} | atom().
+ {'policy_requirement_not_met', term()} | {'invalid_policy_mapping', term()} | {revoked, crl_reason()} | invalid_validity_dates | atom().
 
 -type combined_cert() :: #cert{}.
 -type cert() :: der_cert() | otp_cert().
diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl
index d80a8449cc..35aedf0aa5 100644
--- a/lib/public_key/test/public_key_SUITE.erl
+++ b/lib/public_key/test/public_key_SUITE.erl
@@ -23,6 +23,7 @@
 
 -include_lib("common_test/include/ct.hrl").
 -include_lib("public_key/include/public_key.hrl").
+-include_lib("eunit/include/eunit.hrl").
 
 -export([
 suite/0,
@@ -97,6 +98,8 @@
 pkix_path_validation_root_expired/1,
 pkix_ext_key_usage/0,
 pkix_ext_key_usage/1,
+ pkix_path_validation_bad_date/0,
+ pkix_path_validation_bad_date/1,
 pkix_verify_hostname_cn/1,
 pkix_verify_hostname_subjAltName/1,
 pkix_verify_hostname_options/1,
@@ -159,6 +162,7 @@ all() ->
 pkix_path_validation,
 pkix_path_validation_root_expired,
 pkix_ext_key_usage,
+ pkix_path_validation_bad_date,
 pkix_iso_rsa_oid, 
 pkix_iso_dsa_oid, 
 pkix_dsa_sha2_oid,
@@ -193,9 +197,9 @@ groups() ->
 init_per_suite(Config) ->
 application:stop(crypto),
 try crypto:start() of
-	ok ->
-	 application:start(asn1),
-	 Config
+ ok ->
+ application:start(asn1),
+ Config
 catch _:_ ->
 	 {skip, "Crypto did not start"}
 end.
@@ -966,6 +970,37 @@ pkix_ext_key_usage(Config) when is_list(Config) ->
 
 {ok, _} = public_key:pkix_path_validation(CRoot, [CICA, CPeer], []).
 
+pkix_path_validation_bad_date() ->
+ [{doc, "Ensure bad date formats in `validity` are handled gracefully by verify fun"}].
+pkix_path_validation_bad_date(Config) when is_list(Config) ->
+ % Load PEM certchain from file
+ DataDir = proplists:get_value(data_dir, Config),
+ {ok, Bin} = file:read_file(filename:join(DataDir,"bad_date_certchain.pem")),
+
+ % Decode and extract raw der encoded certificates
+ CertificateList = public_key:pem_decode(Bin),
+ [Root | CertificateChain] = lists:map(fun({'Certificate', Der, _}) -> Der end, CertificateList),
+
+ % First test error `invalid_validity_dates` being returned correctly without `verify_fun` override
+ {error, {bad_cert, invalid_validity_dates}} = public_key:pkix_path_validation(Root, CertificateChain, []),
+
+ % Then test no exception thrown if verify_fun function traps the date error
+ {ok, _} = public_key:pkix_path_validation(Root, CertificateChain, [
+ {verify_fun, % This is the same as ?DEFAULT_VERIFYFUN, but it handles `invalid_validity_dates` gracefully.
+ {fun
+ % Test if we can successfully override `invalid_validity_dates`
+ (_, {bad_cert, invalid_validity_dates}, UserState) ->
+ {valid, UserState};
+ (_,{extension, _}, UserState) ->
+		 {unknown, UserState};
+ (_, valid_peer, UserState) ->
+				 {valid, UserState};
+ (_, valid, UserState) ->
+ {valid, UserState}
+ end, []}
+ }
+ ]).
+
 %%--------------------------------------------------------------------
 %% To generate the PEM file contents:
 %%
diff --git a/lib/public_key/test/public_key_SUITE_data/bad_date_certchain.pem b/lib/public_key/test/public_key_SUITE_data/bad_date_certchain.pem
new file mode 100644
index 0000000000..6b9cdd1f59
--- /dev/null
+++ b/lib/public_key/test/public_key_SUITE_data/bad_date_certchain.pem
@@ -0,0 +1,89 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIICJTCCAaugAwIBAgIKFJFhkHRjCHkTEzAKBggqhkjOPQQDAjApMRkwFwYDVQQF
+ExAxZGY0ZTA2YTZjNDJmNjUxMQwwCgYDVQQMDANURUUwHhcNMTkwNDE5MjA0MzM1
+WhcNMjkwNDE2MjA0MzM1WjApMRkwFwYDVQQFExA3YmIyODNhYzZhMTJlZjQyMQww
+CgYDVQQMDANURUUwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQg8ESy1cm/geei
+pjZ0+ICsdGXWFhk39+NstMkef2yyv4WFdSS2aJsD2yYaCq2NbsrlwLkqeac5q9Do
+7TMC9kCvo4G6MIG3MB0GA1UdDgQWBBTJnSBDgBTwTVVBhI0E6h4knugQ2zAfBgNV
+HSMEGDAWgBRqgbARQ6Cxo+9uCtUBhAAuSsUqsTAPBgNVHRMBAf8EBTADAQH/MA4G
+A1UdDwEB/wQEAwICBDBUBgNVHR8ETTBLMEmgR6BFhkNodHRwczovL2FuZHJvaWQu
+Z29vZ2xlYXBpcy5jb20vYXR0ZXN0YXRpb24vY3JsLzE0OTE2MTkwNzQ2MzA4Nzkx
+MzEzMAoGCCqGSM49BAMCA2gAMGUCMQCZHAGiDQlu+OL5B/PmUFuV2A1yrWhsto7p
+HIhWCre4X72R/WNczwmV0vScL4Bs0d4CMFBQoYOMOvKrcS6aIMRngdIb0dq6rnky
+lQ3V6ltZhRrwjLhSJXRTmfmKVl1EetLnTw==
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
\ No newline at end of file
-- 
2.35.3

Places

File 0552-Gracefully-handle-bad-validity-dates-in-public_key-p.patch of Package erlang (Revision b1ddc78860c1f178c6361caad002e77d)

Places