Fix use of SHAKE as a digest in CMS

draft-ietf-lamps-cms-sphincs-plus-19 specifies SHAKE as
the message digest algorithm for SLH-DSA-SHAKE-* in CMS.
SHAKE doesn't have a default digest length, so this adds
a SHAKE-specific kludge in CMS.

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/27087)

diff --git a/crypto/cms/cms_lib.c b/crypto/cms/cms_lib.c
index e8aeb806b2e9f026a82f18b241f067ec33d6cc55..2bf043103078de1e0dc3b2cdb0f5de0e2af72ced 100644 (file)
--- a/crypto/cms/cms_lib.c
+++ b/crypto/cms/cms_lib.c
@@ -14,6 +14,7 @@
 #include <openssl/bio.h>
 #include <openssl/asn1.h>
 #include <openssl/cms.h>
+#include <openssl/core_names.h>
 #include "internal/sizes.h"
 #include "internal/cryptlib.h"
 #include "crypto/x509.h"
@@ -407,6 +408,7 @@ BIO *ossl_cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm,
     const EVP_MD *digest = NULL;
     EVP_MD *fetched_digest = NULL;
     char alg[OSSL_MAX_NAME_SIZE];
+    size_t xof_len = 0;
 
     X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
     OBJ_obj2txt(alg, sizeof(alg), digestoid, 0);
@@ -431,6 +433,24 @@ BIO *ossl_cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm,
         ERR_raise(ERR_LIB_CMS, CMS_R_MD_BIO_INIT_ERROR);
         goto err;
     }
+    if (EVP_MD_xof(digest)) {
+        if (EVP_MD_is_a(digest, SN_shake128))
+            xof_len = 32;
+        else if (EVP_MD_is_a(digest, SN_shake256))
+            xof_len = 64;
+        if (xof_len > 0) {
+            EVP_MD_CTX *mdctx;
+            OSSL_PARAM params[2];
+
+            if (BIO_get_md_ctx(mdbio, &mdctx) <= 0 || mdctx == NULL)
+                goto err;
+            params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN,
+                                                    &xof_len);
+            params[1] = OSSL_PARAM_construct_end();
+            if (!EVP_MD_CTX_set_params(mdctx, params))
+                goto err;
+        }
+    }
     EVP_MD_free(fetched_digest);
     return mdbio;
  err:

diff --git a/test/recipes/80-test_cms.t b/test/recipes/80-test_cms.t
index 361dd345123937d2db0518de01823d5b8aa2ae99..21d787fbad1674b72988001ec256a7b42ef037bf 100644 (file)
--- a/test/recipes/80-test_cms.t
+++ b/test/recipes/80-test_cms.t
@@ -52,7 +52,7 @@ my ($no_des, $no_dh, $no_dsa, $no_ec, $no_ec2m, $no_rc2, $no_zlib)
 
 $no_rc2 = 1 if disabled("legacy");
 
-plan tests => 28;
+plan tests => 30;
 
 ok(run(test(["pkcs7_test"])), "test pkcs7");
 
@@ -1398,3 +1398,65 @@ subtest "EdDSA tests for CMS \n" => sub {
            "accept CMS verify with Ed25519");
     }
 };
+
+subtest "ML-DSA tests for CMS \n" => sub {
+    plan tests => 2;
+
+    SKIP: {
+        skip "ML-DSA is not supported in this build", 2
+            if disabled("ml-dsa");
+
+        my $sig1 = "sig1.cms";
+
+        # draft-ietf-lamps-cms-ml-dsa: use SHA512 with ML-DSA
+        ok(run(app(["openssl", "cms", @prov, "-sign", "-md", "sha512", "-in", $smcont,
+                    "-certfile", $smroot, "-signer", catfile($smdir, "sm_mldsa44.pem"),
+                    "-out", $sig1])),
+           "accept CMS signature with ML-DSA-44");
+
+        ok(run(app(["openssl", "cms", @prov, "-verify", "-in", $sig1,
+                    "-CAfile", $smroot, "-content", $smcont])),
+           "accept CMS verify with ML-DSA-44");
+    }
+};
+
+subtest "SLH-DSA tests for CMS \n" => sub {
+    plan tests => 6;
+
+    SKIP: {
+        skip "SLH-DSA is not supported in this build", 6
+            if disabled("slh-dsa");
+
+        my $sig1 = "sig1.cms";
+
+        # draft-ietf-lamps-cms-sphincs-plus: use SHA512 with SLH-DSA-SHA2
+        ok(run(app(["openssl", "cms", @prov, "-sign", "-md", "sha512", "-in", $smcont,
+                    "-certfile", $smroot, "-signer", catfile($smdir, "sm_slhdsa_sha2_128s.pem"),
+                    "-out", $sig1])),
+           "accept CMS signature with SLH-DSA-SHA2-128s");
+
+        ok(run(app(["openssl", "cms", @prov, "-verify", "-in", $sig1,
+                    "-CAfile", $smroot, "-content", $smcont])),
+           "accept CMS verify with SLH-DSA-SHA2-128s");
+
+        # draft-ietf-lamps-cms-sphincs-plus: use SHAKE128 with SLH-DSA-SHAKE-128*
+        ok(run(app(["openssl", "cms", @prov, "-sign", "-md", "shake128", "-in", $smcont,
+                    "-certfile", $smroot, "-signer", catfile($smdir, "sm_slhdsa_shake_128s.pem"),
+                    "-out", $sig1])),
+           "accept CMS signature with SLH-DSA-SHAKE-128s");
+
+        ok(run(app(["openssl", "cms", @prov, "-verify", "-in", $sig1,
+                    "-CAfile", $smroot, "-content", $smcont])),
+           "accept CMS verify with SLH-DSA-SHAKE-128s");
+
+        # draft-ietf-lamps-cms-sphincs-plus: use SHAKE256 with SLH-DSA-SHAKE-256*
+        ok(run(app(["openssl", "cms", @prov, "-sign", "-md", "shake256", "-in", $smcont,
+                    "-certfile", $smroot, "-signer", catfile($smdir, "sm_slhdsa_shake_256s.pem"),
+                    "-out", $sig1])),
+           "accept CMS signature with SLH-DSA-SHAKE-256s");
+
+        ok(run(app(["openssl", "cms", @prov, "-verify", "-in", $sig1,
+                    "-CAfile", $smroot, "-content", $smcont])),
+           "accept CMS verify with SLH-DSA-SHAKE-256s");
+    }
+};

diff --git a/test/smime-certs/mksmime-certs.sh b/test/smime-certs/mksmime-certs.sh
old mode 100644 (file)
new mode 100755 (executable)
index 0edf1d7..d989683
--- a/test/smime-certs/mksmime-certs.sh
+++ b/test/smime-certs/mksmime-certs.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright 2013-2023 The OpenSSL Project Authors. All Rights Reserved.
+# Copyright 2013-2025 The OpenSSL Project Authors. All Rights Reserved.
 #
 # Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
@@ -67,3 +67,16 @@ gen smdh.pem "/CN=Test SMIME EE DH" dh_cert >>smdh.pem
 # EE RSA code signing end entity certificate with respective extensions
 cp ../certs/ee-key.pem csrsa1.pem
 gen csrsa1.pem "/CN=Test CodeSign EE RSA" codesign_cert >>csrsa1.pem
+
+# Create PQ certificates with respective extensions
+$OPENSSL genpkey -algorithm ML-DSA-44 -out sm_mldsa44.pem
+gen sm_mldsa44.pem "/CN=Test SMIME EE ML-DSA-44" signer_cert >>sm_mldsa44.pem
+$OPENSSL genpkey -algorithm SLH-DSA-SHA2-128s -out sm_slhdsa_sha2_128s.pem
+gen sm_slhdsa_sha2_128s.pem "/CN=Test SMIME EE SLH-DSA-SHA2-128s" \
+    signer_cert >>sm_slhdsa_sha2_128s.pem
+$OPENSSL genpkey -algorithm SLH-DSA-SHAKE-128s -out sm_slhdsa_shake_128s.pem
+gen sm_slhdsa_shake_128s.pem "/CN=Test SMIME EE SLH-DSA-SHAKE-128s" \
+    signer_cert >>sm_slhdsa_shake_128s.pem
+$OPENSSL genpkey -algorithm SLH-DSA-SHAKE-256s -out sm_slhdsa_shake_256s.pem
+gen sm_slhdsa_shake_256s.pem "/CN=Test SMIME EE SLH-DSA-SHAKE-256s" \
+    signer_cert >>sm_slhdsa_shake_256s.pem

diff --git a/test/smime-certs/sm_mldsa44.pem b/test/smime-certs/sm_mldsa44.pem
new file mode 100644 (file)
index 0000000..e4b6ebe
--- /dev/null
+++ b/test/smime-certs/sm_mldsa44.pem
@@ -0,0 +1,99 @@
+-----BEGIN PRIVATE KEY-----
+MIIKPgIBADALBglghkgBZQMEAxEEggoqMIIKJgQgmsSm9eI30++j5lPGc4VSUHl8
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+bPVseTnHfXpVTRGdUSFLb5hyaNTiWFlMTX0OmfqQ6R9iOA==
+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
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+wme8H314QJnFKfUcGNNrNN/dElirhmU=
+-----END CERTIFICATE-----

diff --git a/test/smime-certs/sm_slhdsa_sha2_128s.pem b/test/smime-certs/sm_slhdsa_sha2_128s.pem
new file mode 100644 (file)
index 0000000..45ba854
--- /dev/null
+++ b/test/smime-certs/sm_slhdsa_sha2_128s.pem
@@ -0,0 +1,19 @@
+-----BEGIN PRIVATE KEY-----
+MFICAQAwCwYJYIZIAWUDBAMUBECT5RmZe6OO8vsKNkthvx+UPRB8d7wbvTJB1UgM
+zLwGZWYszdtLdA++kdkjuW5vJNeZVVKuVhhsqT7/bm5Rdz2I
+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

diff --git a/test/smime-certs/sm_slhdsa_shake_128s.pem b/test/smime-certs/sm_slhdsa_shake_128s.pem
new file mode 100644 (file)
index 0000000..84af464
--- /dev/null
+++ b/test/smime-certs/sm_slhdsa_shake_128s.pem
@@ -0,0 +1,19 @@
+-----BEGIN PRIVATE KEY-----
+MFICAQAwCwYJYIZIAWUDBAMaBEBtEDfB3z2GkApieWwYEcUwym4LqAn+f3ekIXpy
+3Ih301cGLuxKkbFlC18GqkEFy2hrtjlDrRImYToCJ1S4HlzY
+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
+MIICaDCCAVCgAwIBAgIUP4qMOjsrV/JbvCEgSaqBovSvz1cwDQYJKoZIhvcNAQEL
+BQAwRDELMAkGA1UEBhMCVUsxFjAUBgNVBAoMDU9wZW5TU0wgR3JvdXAxHTAbBgNV
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+8l1MHH0UEuLdhXCOiSbQiXqYfWJig+2AmM5VLeWAysX6BixVKxG25jSsAZE=
+-----END CERTIFICATE-----

diff --git a/test/smime-certs/sm_slhdsa_shake_256s.pem b/test/smime-certs/sm_slhdsa_shake_256s.pem
new file mode 100644 (file)
index 0000000..5d177be
--- /dev/null
+++ b/test/smime-certs/sm_slhdsa_shake_256s.pem
@@ -0,0 +1,22 @@
+-----BEGIN PRIVATE KEY-----
+MIGTAgEAMAsGCWCGSAFlAwQDHgSBgG4ItImtx5rfHYI99Xo2Wl4PSpqyeMaZrjtW
+QYKovvW2pKvcIc4Re7OnKKHMjIvow/1TaRQUHRUQQFQC/DygeacNpVdWjGZ1/jnc
+D0XfWgfvX0KwATwmXO9NM7Rq7B5OZ1uyykT3e8mPhn5afbRkNvfhKgID07Ukiz1c
+/6XQf7nU
+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
+MIICiDCCAXCgAwIBAgIUStYfQbEa4PtzChfKNmTE65EId3YwDQYJKoZIhvcNAQEL
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++4+ts3nVjUeEsRdGMv+gl3/926nsxozJtUO5OA==
+-----END CERTIFICATE-----