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-rw-r--r--lib/public_key/doc/src/public_key.xml21
-rw-r--r--lib/public_key/src/public_key.erl85
-rw-r--r--lib/public_key/test/public_key_SUITE.erl39
3 files changed, 142 insertions, 3 deletions
diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml
index becb5338e0..96901ed516 100644
--- a/lib/public_key/doc/src/public_key.xml
+++ b/lib/public_key/doc/src/public_key.xml
@@ -863,7 +863,26 @@ fun(#'DistributionPoint'{}, #'CertificateList'{},
<p>Verifies a digital signature.</p>
</desc>
</func>
-
+
+ <func>
+ <name>short_name_hash(Name) -> string()</name>
+ <type>
+ <v>Name = issuer_name()</v>
+ </type>
+ <desc>
+ <p>Generates a short hash of an issuer name. The hash is
+ returned as a string containing eight hexadecimal digits.</p>
+
+ <p>The return value of this function is the same as the result
+ of the commands <c>openssl crl -hash</c> and
+ <c>openssl x509 -issuer_hash</c>, when passed the issuer name of
+ a CRL or a certificate, respectively. This hash is used by the
+ <c>c_rehash</c> tool to maintain a directory of symlinks to CRL
+ files, in order to facilitate looking up a CRL by its issuer
+ name.</p>
+ </desc>
+ </func>
+
</funcs>
</erlref>
diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl
index 27bf2093a1..d23abfe256 100644
--- a/lib/public_key/src/public_key.erl
+++ b/lib/public_key/src/public_key.erl
@@ -55,7 +55,8 @@
pkix_dist_points/1,
pkix_match_dist_point/2,
pkix_crl_verify/2,
- pkix_crl_issuer/1
+ pkix_crl_issuer/1,
+ short_name_hash/1
]).
-export_type([public_key/0, private_key/0, pem_entry/0,
@@ -818,6 +819,17 @@ oid2ssh_curvename(?'secp384r1') -> <<"nistp384">>;
oid2ssh_curvename(?'secp521r1') -> <<"nistp521">>.
%%--------------------------------------------------------------------
+-spec short_name_hash({rdnSequence, [#'AttributeTypeAndValue'{}]}) ->
+ string().
+
+%% Description: Generates OpenSSL-style hash of a name.
+%%--------------------------------------------------------------------
+short_name_hash({rdnSequence, _Attributes} = Name) ->
+ HashThis = encode_name_for_short_hash(Name),
+ <<HashValue:32/little, _/binary>> = crypto:hash(sha, HashThis),
+ string:to_lower(string:right(integer_to_list(HashValue, 16), 8, $0)).
+
+%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
do_verify(DigestOrPlainText, DigestType, Signature,
@@ -1080,3 +1092,74 @@ ec_key({PubKey, PrivateKey}, Params) ->
parameters = Params,
publicKey = PubKey}.
+encode_name_for_short_hash({rdnSequence, Attributes0}) ->
+ Attributes = lists:map(fun normalise_attribute/1, Attributes0),
+ {Encoded, _} = 'OTP-PUB-KEY':'enc_RDNSequence'(Attributes, []),
+ Encoded.
+
+%% Normalise attribute for "short hash". If the attribute value
+%% hasn't been decoded yet, decode it so we can normalise it.
+normalise_attribute([#'AttributeTypeAndValue'{
+ type = _Type,
+ value = Binary} = ATV]) when is_binary(Binary) ->
+ case pubkey_cert_records:transform(ATV, decode) of
+ #'AttributeTypeAndValue'{value = Binary} ->
+ %% Cannot decode attribute; return original.
+ [ATV];
+ DecodedATV = #'AttributeTypeAndValue'{} ->
+ %% The new value will either be String or {Encoding,String}.
+ normalise_attribute([DecodedATV])
+ end;
+normalise_attribute([#'AttributeTypeAndValue'{
+ type = _Type,
+ value = {Encoding, String}} = ATV])
+ when
+ Encoding =:= utf8String;
+ Encoding =:= printableString;
+ Encoding =:= teletexString;
+ Encoding =:= ia5String ->
+ %% These string types all give us something that the unicode
+ %% module understands.
+ NewValue = normalise_attribute_value(String),
+ [ATV#'AttributeTypeAndValue'{value = NewValue}];
+normalise_attribute([#'AttributeTypeAndValue'{
+ type = _Type,
+ value = String} = ATV]) when is_list(String) ->
+ %% A string returned by pubkey_cert_records:transform/2, for
+ %% certain attributes that commonly have incorrect value types.
+ NewValue = normalise_attribute_value(String),
+ [ATV#'AttributeTypeAndValue'{value = NewValue}].
+
+normalise_attribute_value(String) ->
+ Converted = unicode:characters_to_binary(String),
+ NormalisedString = normalise_string(Converted),
+ %% We can't use the encoding function for the actual type of the
+ %% attribute, since some of them don't allow utf8Strings, which is
+ %% the required encoding when creating the hash.
+ {NewBinary, _} = 'OTP-PUB-KEY':'enc_X520CommonName'({utf8String, NormalisedString}, []),
+ NewBinary.
+
+normalise_string(String) ->
+ %% Normalise attribute values as required for "short hashes", as
+ %% implemented by OpenSSL.
+
+ %% Remove ASCII whitespace from beginning and end.
+ TrimmedLeft = re:replace(String, "^[\s\f\n\r\t\v]+", "", [unicode, global]),
+ TrimmedRight = re:replace(TrimmedLeft, "[\s\f\n\r\t\v]+$", "", [unicode, global]),
+ %% Convert multiple whitespace characters to a single space.
+ Collapsed = re:replace(TrimmedRight, "[\s\f\n\r\t\v]+", "\s", [unicode, global]),
+ %% Convert ASCII characters to lowercase
+ Lower = ascii_to_lower(Collapsed),
+ %% And we're done!
+ Lower.
+
+ascii_to_lower(String) ->
+ %% Can't use string:to_lower/1, because that changes Latin-1
+ %% characters as well.
+ << <<(if $A =< C, C =< $Z ->
+ C + ($a - $A);
+ true ->
+ C
+ end)>>
+ ||
+ <<C>> <= iolist_to_binary(String) >>.
diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl
index 2fbccbfaa7..2462c17f80 100644
--- a/lib/public_key/test/public_key_SUITE.erl
+++ b/lib/public_key/test/public_key_SUITE.erl
@@ -43,7 +43,8 @@ all() ->
encrypt_decrypt,
{group, sign_verify},
pkix, pkix_countryname, pkix_emailaddress, pkix_path_validation,
- pkix_iso_rsa_oid, pkix_iso_dsa_oid, pkix_crl].
+ pkix_iso_rsa_oid, pkix_iso_dsa_oid, pkix_crl,
+ short_cert_issuer_hash, short_crl_issuer_hash].
groups() ->
[{pem_decode_encode, [], [dsa_pem, rsa_pem, ec_pem, encrypted_pem,
@@ -805,6 +806,42 @@ pkix_crl(Config) when is_list(Config) ->
distributionPoint = Point} = public_key:pkix_dist_point(OTPIDPCert).
%%--------------------------------------------------------------------
+short_cert_issuer_hash() ->
+ [{doc, "Test OpenSSL-style hash for certificate issuer"}].
+
+short_cert_issuer_hash(Config) when is_list(Config) ->
+ Datadir = ?config(data_dir, Config),
+ [{'Certificate', CertDER, _}] =
+ erl_make_certs:pem_to_der(filename:join(Datadir, "client_cert.pem")),
+
+ %% This hash value was obtained by running:
+ %% openssl x509 -in client_cert.pem -issuer_hash -noout
+ CertIssuerHash = "d4c8d7e5",
+
+ #'OTPCertificate'{tbsCertificate = #'OTPTBSCertificate'{issuer = Issuer}} =
+ public_key:pkix_decode_cert(CertDER, otp),
+
+ CertIssuerHash = public_key:short_name_hash(Issuer).
+
+%%--------------------------------------------------------------------
+short_crl_issuer_hash() ->
+ [{doc, "Test OpenSSL-style hash for CRL issuer"}].
+
+short_crl_issuer_hash(Config) when is_list(Config) ->
+ Datadir = ?config(data_dir, Config),
+ [{'CertificateList', CrlDER, _}] =
+ erl_make_certs:pem_to_der(filename:join(Datadir, "idp_crl.pem")),
+
+ %% This hash value was obtained by running:
+ %% openssl crl -in idp_crl.pem -hash -noout
+ CrlIssuerHash = "d6134ed3",
+
+ Issuer = public_key:pkix_crl_issuer(CrlDER),
+
+ CrlIssuerHash = public_key:short_name_hash(Issuer).
+
+
+%%--------------------------------------------------------------------
%% Internal functions ------------------------------------------------
%%--------------------------------------------------------------------
asn1_encode_decode({Asn1Type, Der, not_encrypted} = Entry) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 17:26:45 +0000