diff --git a/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux
new file mode 100644
index 0000000..967f8f5
--- /dev/null
+++ b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux
Binary files differ
diff --git a/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv
new file mode 100644
index 0000000..ab1b23f
--- /dev/null
+++ b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv
Binary files differ
diff --git a/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.pub b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.pub
new file mode 100644
index 0000000..5397d60
--- /dev/null
+++ b/tests/data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.pub
Binary files differ
diff --git a/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv b/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv
new file mode 100644
index 0000000..6e827ce
--- /dev/null
+++ b/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.prv
Binary files differ
diff --git a/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.pub b/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.pub
new file mode 100644
index 0000000..652c089
--- /dev/null
+++ b/tests/data_files/lms_pylmshss_sha256_m32_h5_lmots_sha256_n32_w8.pub
Binary files differ
diff --git a/tests/suites/test_suite_lms.data b/tests/suites/test_suite_lms.data
index 1b14230..5dd9019 100644
--- a/tests/suites/test_suite_lms.data
+++ b/tests/suites/test_suite_lms.data
@@ -8,65 +8,173 @@
 # signs the message, and verifies the signature.
 lms_sign_verify_null_msg_test:"923a3c8e38c9b72e067996bfdaa36856"
 
+LMS pyhsslms interop test #1
+# This test uses data from https://github.com/russhousley/pyhsslms due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8_prv. Note that this signature
+# uses leaf key 0, so must be the first signature generated by the key if the
+# signature is to be reproduced. Message data is random. Note that hash-sigs
+# stores public keys and signatures in HSS form, which appends a 4-byte "levels"
+# word at the start of the key/sig. We strip these 4 bytes from the signature
+# and the public key before including them in a the test data.
+#
+# To reproduce the signature:
+# * sudo pip3 install pyhsslms
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8_prv tmp/lms.prv
+# * <Save message in binary format>
+# * hsslms sign tmp/lms.prv message.bin
+# * cat message.bin.sig | xxd
+#
+# To validate the signature:
+# * Save message and signature in binary format
+# * echo -n -e "\0\0\0\0" > message.bin.sig; cat sig.bin >> message.bin.sig (restore the
+#   HSS levels)
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8 tmp/lms.pub
+# * hsslms verify tmp/lms message.bin
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":0
+
+LMS pyhsslms interop test #2
+# This test uses data from https://github.com/russhousley/pyhsslms due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8_prv. Note that this signature
+# uses leaf key 1, so must be the second signature generated by the key if the
+# signature is to be reproduced. Message data is random. Note that hash-sigs
+# stores public keys and signatures in HSS form, which appends a 4-byte "levels"
+# word at the start of the key/sig. We strip these 4 bytes from the signature
+# and the public key before including them in a the test data.
+#
+# To reproduce the signature:
+# * sudo pip3 install pyhsslms
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8_prv tmp/lms.prv
+# * <Save message in binary format>
+# * hsslms sign tmp/lms.prv message.bin (incorrect signature using leaf node 0)
+# * rm message.bin.sig
+# * hsslms sign tmp/lms.prv message.bin (correct signature using leaf node 1)
+# * cat message.bin.sig | xxd
+#
+# To validate the signature:
+# * Save message and signature in binary format
+# * echo -n -e "\0\0\0\0" > message.bin.sig; cat sig.bin >> message.bin.sig (restore the
+#   HSS levels)
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8 tmp/lms.pub
+# * hsslms verify tmp/lms message.bin
+lms_verify_test:"3f4fe37f1bb9547e443e53697a12f0393efbcf87c23d91765eb36100dd5d2c48":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":0
+
+LMS pyhsslms interop NULL-message test
+# This test uses data from https://github.com/russhousley/pyhsslms due to the limited
+# amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8.prv. Note that this signature
+# uses leaf key 2, so must be the third signature generated by the key if the
+# signature is to be reproduced. Message data is random. Note that hash-sigs
+# stores public keys and signatures in HSS form, which appends a 4-byte
+# "levels" word at the start of the key/sig. We strip these 4 bytes from the
+# signature and the public key before including them in a the test data.
+#
+# To reproduce the signature:
+# * sudo pip3 install pyhsslms
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8.prv tmp/lms.prv
+# * touch message.bin (create empty message file)
+# * hsslms sign tmp/lms.prv message.bin (incorrect signature using leaf node 0)
+# * rm message.bin.sig
+# * hsslms sign tmp/lms.prv message.bin (incorrect signature using leaf node 1)
+# * rm message.bin.sig
+# * hsslms sign tmp/lms.prv message.bin (correct signature using leaf node 2)
+# * cat message.bin.sig | xxd
+#
+# To validate the signature:
+# * <Save signature in binary format>
+# * touch message.bin (create empty message file)
+# * echo -n -e "\0\0\0\0" > message.bin.sig; cat sig.bin >> message.bin.sig (restore the
+#   HSS levels)
+# * cp data_files/lms_pyhsslms_sha256_m32_h5_lmots_sha256_n32_w8 tmp/lms.pub
+# * hsslms verify tmp/lms message.bin
+lms_verify_test:"":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":0
+
 LMS hash-sigs interop test #1
-# This test uses data from https://github.com/cisco/hash-sigs due to the limited
-# amount of available test vectors for LMS. A public/private key was generated
-# and used to sign a randomly generated message. We expect this
-# message/signature/public key trio to verify correctly.
-lms_verify_test:"D5557C719EBB0DBECF563E5CDB16568BB11CD779":"0000000000000004C167A9AC495BD4EA34CD8EE5AAA2A656D518C33612FD87171421BFC3977CFA99765C6D496499C72A1DE21360DA57EB96BC83DB8AA92E560054C7805B04E336162FB4C411B509F76959F2458B0E53CF830E0145CCD439D494259EA4818CA68924A7E8B9DD36D6A9C7849B72F9338ED6C80A3E70B717E8E65B991B2FF9D8B49820E8ABC9E2ECC17DB38E855DA75D84DF9885C7F9DFB4ABC209CFF1D37D66595371D688A203CB89168945200C39169F784B19665CE1FB47D58BFA734C3E0E7E31D1206A033C6D8E25B7E45CA779A5FDE00C6B1CAC44884F2B52A380E1F6D8753549F7F4948A95AEA83703CF3AA108FA4F735AFC0DA1A03C378033D8B5959E7BE05D3C5070E709181AC09EFEC04128ABD7E8F37304FAD4B66373D4A83CFC1EF632DF6DB95577C2C6101CBDC807109ED8AE831FFB73DBC80942C58F334663B980F982C74B943BF7C57147250AADE595310387E3BB1A2705E9EC73DE7FABDA5EC0B1141A18798215B9A70F8D688357C833ED869059A2AA3360155EF84426288198D0FBB78223816B17093684C48942ED18FCD351C34E108E5B71D1CE39E318B5D991B650C46A91112E013E1180F2054C7A22429CAB31512BA34EA3AD9B68C5001EB70C993297CCF11914ECAF059922DAEE7D90ACE2567495ADA066E7DA1679CA45DAC1990B17184E7BE2E6A0F26AD77F19855D074F5B37372277484CE30B80A0540173C1B310C3E7B683A487B5D0676218EA1F65FEA444C493FC535E948EAB62252DCC90516BB45B60D4253DB6979FE342DC5CA1B86B01B2D8EBA79B0BC7B6984535616B792BB45F3C0E20B506E0694E1D5BA28FE96D34FE2BE354777D090404DD3508E9F7918FF5593ADB468478CA8A1F6AF752CC76F401E373B71471D9D70F455C8A73E4E7B6714394B1DD0E2A816AF3D5149835DAE477A70DEE0BDAC22F99A04BFB7C2D4AD53079C326F620DFD3F7CED4AB7F2E291507AA046331050F9E2205C52B36CBAEE817C5C3B1FBCDE61C54C8CB7B67E0570FA44728EC8FD091D5CEDC19C6B99840F7A0E49086F707E959D34B30E255B67BBAA24FADE532BF3D21825626E114BD8213170B0C2F01733D4ED420D01EE3ACD5F84DACE674AE7127DB0A80ACE252CAD9ADADDAFAB27281AFD6DDD72DB5AF878326C45D7DB1EFF8BC40895A3473A52461D076881310AD9937307217B5C0448B509EF9BA075936CC09E11B8838D3A6BC5EF9FAEA85A3EC87EEFDF2E38CD9732730085375A4FFC4E0A213B0E1FC3DE2D37F1EDACC3030F617F3459A03BFCF776A05FD3B7FD135782F6D6E7C5E92B56A1316525B26D3AE1CEA3C0C7CF3AA7B1E72B7599A31B50837D79A7AB61B9A9E2B7AABD2D605C97E302EB4B66C0588C24147955EA0892A54D42843568FE0863E7EFEAE336D302E672EA62689B4DAA02DD5BC99D93886EC7F411C53CE1CAEAB59FBC0B06E0E294F1900F8C626C6FF520AE2323DA797CDC120DBC19F7FEBA0E13429508C5B838A0F8B9B28A069C5DD40E2F6CC2C95FC6ACE7E1351516817BD2DC1AE08D498AD2B0BD1D8374942FF31FC6A4689C592244C919C3561E73DD4986FA500000006BBF34F6EE152B64FCDD1CB6848D2DA761798707060431761006E2EBD9312851F4F3DF3C46E10F643DDD58CB3D9F4D371F655EE26271F2DDE84A14CAA6A077DD96AF83849DE6CA8F2F3248902CBF49630C18C3EE3123D951CE9162D0E742B899AF9E5DA8D28A41C7CADF0194CDB09418BF48BF322F8C5E9563524196FA8AB785B43C4EA41A36148028D2F4C7356CDEEB09532CD7F2C80FC36589FF7A9954100C8697AEB014997C3088C242B4F70D26CE7F7E77384A9CF536EC5C5329E08BD6C1D65EFEFC1389A42D16FFB43A0E1D7661220E92A4A59703FB28410E73A677E803D4441929DFD7269E6F77AE8CA8C70B67B250A8728291EA5D4E3F03D505639408C88156DCBECC137142FA3585C09D99B84D8C380A5D29CE2ADA10A25F7CF939FE23288551F37FE2B7233BF97C0F5726B972E087BCBA095957CCD794794A4F50027":"00000006000000046B0927585C8547228D495361D73B970C287A2254BF8F1B170E55ACC9520A56CE5D2C711B6617718B49247D28CCC6D11D":0
+# This test uses data from https://github.com/cisco/hash-sigs due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv and
+# data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux. Note that this
+# signature uses leaf key 0, so must be the first signature generated by the key
+# if the signature is to be reproduced. Message data is random. Note that
+# hash-sigs stores public keys and signatures in HSS form, which appends a
+# 4-byte "levels" word at the start of the key/sig. We strip these 4 bytes from
+# the signature and the public key before including them in a the test data.
+#
+# To reproduce the signature:
+# * <download and build hash-sigs>
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv tmp/lms.prv
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux tmp/lms.aux
+# * <Save message in binary format>
+# * <hash-sigs>/demo sign tmp/lms message.bin
+# * cat message.bin.sig | xxd
+#
+# To validate the signature:
+# * Save message and signature in binary format
+# * echo -n -e "\0\0\0\0" > message.bin.sig; cat sig.bin >> message.bin.sig (restore the
+#   HSS levels)
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.pub tmp/lms.pub
+# * <hash-sigs/demo> verify tmp/lms message.bin
+lms_verify_test:"6b7439e31ef128c54f1536f745ff1246":"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":"0000000600000004e18760ef2c86192aee88579e376f35cd153419d622803a483e79f6d368629308a8ab6ff663c4f108b2033af290dcedfa":0
 
 LMS hash-sigs interop test #2
-# This test uses data from https://github.com/cisco/hash-sigs due to the limited
-# amount of available test vectors for LMS. A public/private key was generated
-# and used to sign a randomly generated message. We expect this
-# message/signature/public key trio to verify correctly.
-lms_verify_test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
-
-LMS hash-sigs interop test #3
-# This test uses data from https://github.com/cisco/hash-sigs due to the limited
-# amount of available test vectors for LMS. A public/private key was generated
-# and used to sign a randomly generated message. We expect this
-# message/signature/public key trio to verify correctly.
-lms_verify_test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
-
-LMS hash-sigs interop negative test (altered random value)
-# This test uses data from https://github.com/cisco/hash-sigs due to the limited
-# amount of available test vectors for LMS. A public/private key was generated
-# and used to sign a randomly generated message. This test is a negative test
-# where the signature from the hash-sigs interop test #1 data has been altered,
-# and is expected to fail to verify.
-lms_verify_test:"D5557C719EBB0DBECF563E5CDB16568BB11CD779":"0000000000000004B167A9AC495BD4EA34CD8EE5AAA2A656D518C33612FD87171421BFC3977CFA99765C6D496499C72A1DE21360DA57EB96BC83DB8AA92E560054C7805B04E336162FB4C411B509F76959F2458B0E53CF830E0145CCD439D494259EA4818CA68924A7E8B9DD36D6A9C7849B72F9338ED6C80A3E70B717E8E65B991B2FF9D8B49820E8ABC9E2ECC17DB38E855DA75D84DF9885C7F9DFB4ABC209CFF1D37D66595371D688A203CB89168945200C39169F784B19665CE1FB47D58BFA734C3E0E7E31D1206A033C6D8E25B7E45CA779A5FDE00C6B1CAC44884F2B52A380E1F6D8753549F7F4948A95AEA83703CF3AA108FA4F735AFC0DA1A03C378033D8B5959E7BE05D3C5070E709181AC09EFEC04128ABD7E8F37304FAD4B66373D4A83CFC1EF632DF6DB95577C2C6101CBDC807109ED8AE831FFB73DBC80942C58F334663B980F982C74B943BF7C57147250AADE595310387E3BB1A2705E9EC73DE7FABDA5EC0B1141A18798215B9A70F8D688357C833ED869059A2AA3360155EF84426288198D0FBB78223816B17093684C48942ED18FCD351C34E108E5B71D1CE39E318B5D991B650C46A91112E013E1180F2054C7A22429CAB31512BA34EA3AD9B68C5001EB70C993297CCF11914ECAF059922DAEE7D90ACE2567495ADA066E7DA1679CA45DAC1990B17184E7BE2E6A0F26AD77F19855D074F5B37372277484CE30B80A0540173C1B310C3E7B683A487B5D0676218EA1F65FEA444C493FC535E948EAB62252DCC90516BB45B60D4253DB6979FE342DC5CA1B86B01B2D8EBA79B0BC7B6984535616B792BB45F3C0E20B506E0694E1D5BA28FE96D34FE2BE354777D090404DD3508E9F7918FF5593ADB468478CA8A1F6AF752CC76F401E373B71471D9D70F455C8A73E4E7B6714394B1DD0E2A816AF3D5149835DAE477A70DEE0BDAC22F99A04BFB7C2D4AD53079C326F620DFD3F7CED4AB7F2E291507AA046331050F9E2205C52B36CBAEE817C5C3B1FBCDE61C54C8CB7B67E0570FA44728EC8FD091D5CEDC19C6B99840F7A0E49086F707E959D34B30E255B67BBAA24FADE532BF3D21825626E114BD8213170B0C2F01733D4ED420D01EE3ACD5F84DACE674AE7127DB0A80ACE252CAD9ADADDAFAB27281AFD6DDD72DB5AF878326C45D7DB1EFF8BC40895A3473A52461D076881310AD9937307217B5C0448B509EF9BA075936CC09E11B8838D3A6BC5EF9FAEA85A3EC87EEFDF2E38CD9732730085375A4FFC4E0A213B0E1FC3DE2D37F1EDACC3030F617F3459A03BFCF776A05FD3B7FD135782F6D6E7C5E92B56A1316525B26D3AE1CEA3C0C7CF3AA7B1E72B7599A31B50837D79A7AB61B9A9E2B7AABD2D605C97E302EB4B66C0588C24147955EA0892A54D42843568FE0863E7EFEAE336D302E672EA62689B4DAA02DD5BC99D93886EC7F411C53CE1CAEAB59FBC0B06E0E294F1900F8C626C6FF520AE2323DA797CDC120DBC19F7FEBA0E13429508C5B838A0F8B9B28A069C5DD40E2F6CC2C95FC6ACE7E1351516817BD2DC1AE08D498AD2B0BD1D8374942FF31FC6A4689C592244C919C3561E73DD4986FA500000006BBF34F6EE152B64FCDD1CB6848D2DA761798707060431761006E2EBD9312851F4F3DF3C46E10F643DDD58CB3D9F4D371F655EE26271F2DDE84A14CAA6A077DD96AF83849DE6CA8F2F3248902CBF49630C18C3EE3123D951CE9162D0E742B899AF9E5DA8D28A41C7CADF0194CDB09418BF48BF322F8C5E9563524196FA8AB785B43C4EA41A36148028D2F4C7356CDEEB09532CD7F2C80FC36589FF7A9954100C8697AEB014997C3088C242B4F70D26CE7F7E77384A9CF536EC5C5329E08BD6C1D65EFEFC1389A42D16FFB43A0E1D7661220E92A4A59703FB28410E73A677E803D4441929DFD7269E6F77AE8CA8C70B67B250A8728291EA5D4E3F03D505639408C88156DCBECC137142FA3585C09D99B84D8C380A5D29CE2ADA10A25F7CF939FE23288551F37FE2B7233BF97C0F5726B972E087BCBA095957CCD794794A4F50027":"00000006000000046B0927585C8547228D495361D73B970C287A2254BF8F1B170E55ACC9520A56CE5D2C711B6617718B49247D28CCC6D11D":MBEDTLS_ERR_LMS_VERIFY_FAILED
+# This test uses data from https://github.com/cisco/hash-sigs due to the
+# limited amount of available test vectors for LMS. The private key is stored in
+# data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv and
+# data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux. Note that this
+# signature uses leaf key 1, so must be the second signature generated by the key
+# if the signature is to be reproduced. Message data is random. Note that
+# hash-sigs stores public keys and signatures in HSS form, which appends a
+# 4-byte "levels" word at the start of the key/sig. We strip these 4 bytes from
+# the signature and the public key before including them in a the test data.
+#
+# To reproduce the signature:
+# * <download and build hash-sigs>
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.prv tmp/lms.prv
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.aux tmp/lms.aux
+# * <Save message in binary format>
+# * <hash-sigs>/demo sign tmp/lms message.bin (incorrect signature using leaf node 0)
+# * rm message.bin.sig
+# * <hash-sigs>/demo sign tmp/lms message.bin (correct signature using leaf node 1)
+# * cat message.bin.sig | xxd
+#
+# To validate the signature:
+# * Save message and signature in binary format
+# * echo -n -e "\0\0\0\0" > message.bin.sig; cat sig.bin >> message.bin.sig (restore the
+#   HSS levels)
+# * cp data_files/lms_hash-sigs_sha256_m32_h5_lmots_sha256_n32_w8.pub tmp/lms.pub
+# * <hash-sigs/demo> verify tmp/lms message.bin
+lms_verify_test:"0705ba8297c7b9fa5f08e37825ad24a0":"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":"0000000600000004e18760ef2c86192aee88579e376f35cd153419d622803a483e79f6d368629308a8ab6ff663c4f108b2033af290dcedfa":0
 
 LMS negative test (invalid lms type) #1
-# This test uses a null (zeroed) message/signature/public key trio, with the
-# only parts set being the LMS and LMOTS types. This test has a valid LMOTS type
-# (0x4) but an invalid LMS type, and should fail with a bad input data error.
-lms_verify_test:"0000000000000000000000000000000000000000":"000000000000000400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0000000700000004000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":MBEDTLS_ERR_LMS_BAD_INPUT_DATA
+# This test uses the data from hash-sigs interop test #1. This test has a valid
+# LMOTS type (0x4) but an invalid LMS type (0x7), and should fail with a bad
+# input data error.
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":MBEDTLS_ERR_LMS_VERIFY_FAILED
 
 LMS negative test (invalid lms type) #2
-# This test uses a null (zeroed) message/signature/public key trio, with the
-# only parts set being the LMS and LMOTS types. This test has a valid LMOTS type
-# (0x4) but an invalid LMS type, and should fail with a bad input data error.
-lms_verify_test:"0000000000000000000000000000000000000000":"000000000000000400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0000000500000004000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":MBEDTLS_ERR_LMS_BAD_INPUT_DATA
+# This test uses the data from hash-sigs interop test #1. This test has a valid
+# LMOTS type (0x4) but an invalid LMS type (0x5), and should fail with a bad
+# input data error.
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"0000000000000004e474c96c496b231ecedcd92566ab3e1cdfac83f7e56abaae6571401e212e59bdbcc18105e0709249510d13d7ae1091558c217033316ac70a36aae764bd0f4032e369453c634b81061079d216d03d3c55976a1aabc00287b307297ae03587ba20839460daae85d26dfcef7638c10a1d8559612e5e9ced1a4205a52ca0ce88e58602e59cf9ab34adf2e958e56570573297b99f733fbbf58d2440526fd4dc15c5509e8a11405f6c08772abcf58731fbf9a73642670e3247c5f70905f0fa81f6174bf32977209923507525a170fcd260e81f04193583fbcd305ac245c80eb337ca326fd1105e73748fab8a1f0c8d8a99f011718e7aae027a34d2a85ff18769fa277810126a86b51b096a04d8e28a4fb8c5e14e50a67cb1ee88e43e5cc077902442f5d9c55ac2b8acdd76c67bc740c6083aba4e3cb404c23f1f3118337563fef6a4b01fb476810c5b5682d0aecdccd55c85a4af50e9150f7d83dcccd8e822a302e6e5a52e00505e6e65338dcfb9cfbe22594e9e18ebde36af29450c5ea31523019cf64fd6eca8c77d98c2a146dcedd51bf6c61c1f7cacbce3ab20c8606930cc42737e17f2703cf0980aef560768d1ac5585c05a60a5f94db15f5ac4d4df5cbd81430878d4e9b77346e3a6538b80b80873e3e6c37860470091979296631440adb8cc71991aba2a4dd2884764878306fe774a25512cfbf080f2829ea2903ffa748dd187c21aef918ee3436a1bd336c3d09cc1f748d7528db90a98f69078b82c4d23de7bcec092a292d2b8cac71a5c87d008f128b89a5e608a4501aef41e9f17e4056ed4767957188f780159daebf327751386980b0fca5a2d36b141acff957f46ce2381897099619475db9d3a613e7ef98b056f42b4d6eafb1d62eebbe46a7502f893fbd36ccfb12a280f45ffb93f050eb280bf0a6cd640abdea8590bffb98bdb29ee3a31daa0fa3ab35fee11dc1b7d1fcea82b0e284b2e35b34e77c3f401ed887e7fc6c97b327f76f99caca2f355afa2753a8923bfb06fb2a9df08d31c93882e34ef5a3cccc9d078855334bdf909ae418b177724c42fb1d586d212c4474932acce295236030f4379158957300fe9fdc5cc9145e3ded50cf9f5a8e19321961536c4a47fffc3eb4383fb78a5d2aeed5b45b92132b5e2a53e3b67841fa2e1bd217ee2c30812c4eb1bd4f8c85b328e23d27f12a2fad5c6b236c87f8fd1aad441416e53ebd4d45d4bf601b94eb37dc9a065218ae58e69dba1250bb20626baeda961b3ef11d217697e73f41fa3870d726a032bc4a388fb12c023822945df058e22f54e5f6377eab34297c57883515204fc189d0d4b0ad9bacb24acf7f9d55e7c6368bb8ababd7622f586ec22683306c5d88d5244219a3952adbd85c89893a441a58b532e15600cd5afdbb5b441e1670b72656c7995189bdf993154e09912db8c4ddaff0e75591720230cf99c8b71cd841dffc4372c5e0f9ff906a379d28d6884351609bf7c849ebfabfb049ae986bbb8467251dbf5ccdd05a86ff6ce1392f7ca1bd49595ad9ad805d71b389afab1865f7f69dc24662af19934f025ced212536509500c132aec000000078b991bed50319a6cb9ff040b92f1563889b3787c37145fc9737d4643f66ade33ebd85a2c29b8c64a581cff01b89d59807d6fade2d2c88872f77d0ed83d97c4b5438681d0b95feb973125e4ee70ebe11699290b831e86571e36513a71f159d48ce563f6814cc2a89851d2520c5275b34cc83614cab14c0d197166580d800ee6b9004b8fd72daac8d73c36c1623c37be93ba49a06c4efde238a3a10a05daba5d4942f7de52648af2be31f33e723b3605346282f5d5e356c5d0004eea40fe0b80abf658f6c96c56319ab53d7fefb5879e0136d1cf320973a2f47c1ee3d21554910f09d17afac4607657c4309890957a4954bf86e2a8491ba37dd88b2c3fe3c7edebd767c400bc23e40d165b27133c726b90bc26cbb2a86a6aa400c47aa7ffc538388de8490b9349afa53b814ffe2a56ff16a496e9648284193754f989f6f12aeb6e":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":MBEDTLS_ERR_LMS_VERIFY_FAILED
 
 LMS negative test (invalid lm_ots type) #1
-# This test uses a null (zeroed) message/signature/public key trio, with the
-# only parts set being the LMS and LMOTS types. This test has a valid LMS type
-# (0x6) but an invalid LMOTS type, and should fail with a bad input data error.
-lms_verify_test:"0000000000000000000000000000000000000000":"000000000000000300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0000000600000003000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":MBEDTLS_ERR_LMS_BAD_INPUT_DATA
+# This test uses the data from hash-sigs interop test #1. This test has an
+# invalid LMOTS type (0x3) but an invalid LMS type (0x6), and should fail with a
+# bad input data error.
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":MBEDTLS_ERR_LMS_VERIFY_FAILED
 
 LMS negative test (invalid lm_ots type) #2
-# This test uses a null (zeroed) message/signature/public key trio, with the
-# only parts set being the LMS and LMOTS types. This test has a valid LMS type
-# (0x6) but an invalid LMOTS type, and should fail with a bad input data error.
-lms_verify_test:"0000000000000000000000000000000000000000":"000000000000000500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0000000600000005000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":MBEDTLS_ERR_LMS_BAD_INPUT_DATA
+# This test uses the data from hash-sigs interop test #1. This test has an
+# invalid LMOTS type (0x5) but an invalid LMS type (0x6), and should fail with a
+# bad input data error.
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"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":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":MBEDTLS_ERR_LMS_VERIFY_FAILED
 
 LMS negative test (invalid leaf ID)
-# This test uses a null (zeroed) message/signature/public key trio, with the
-# only parts set being the LMS and LMOTS types and the leaf ID. In this case,
+# This test uses the data from hash-sigs interop test #1. In this case,
 # the leaf ID is 1024, which is invalid for MBEDTLS_LMS_SHA256_M32_H10. This
 # test should fail to verify the signature.
-lms_verify_test:"0000000000000000000000000000000000000000":"000004000000000400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":"0000000600000004000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000":MBEDTLS_ERR_LMS_VERIFY_FAILED
+lms_verify_test:"bfff9cd687351db88a98c71fd2f9b927a0ee600130a112533b791041d30cb91665fc369a5ac7cc9a04547414ac45288081d19d4a600579c73ac4bc953de03ad6":"0000040000000004e474c96c496b231ecedcd92566ab3e1cdfac83f7e56abaae6571401e212e59bdbcc18105e0709249510d13d7ae1091558c217033316ac70a36aae764bd0f4032e369453c634b81061079d216d03d3c55976a1aabc00287b307297ae03587ba20839460daae85d26dfcef7638c10a1d8559612e5e9ced1a4205a52ca0ce88e58602e59cf9ab34adf2e958e56570573297b99f733fbbf58d2440526fd4dc15c5509e8a11405f6c08772abcf58731fbf9a73642670e3247c5f70905f0fa81f6174bf32977209923507525a170fcd260e81f04193583fbcd305ac245c80eb337ca326fd1105e73748fab8a1f0c8d8a99f011718e7aae027a34d2a85ff18769fa277810126a86b51b096a04d8e28a4fb8c5e14e50a67cb1ee88e43e5cc077902442f5d9c55ac2b8acdd76c67bc740c6083aba4e3cb404c23f1f3118337563fef6a4b01fb476810c5b5682d0aecdccd55c85a4af50e9150f7d83dcccd8e822a302e6e5a52e00505e6e65338dcfb9cfbe22594e9e18ebde36af29450c5ea31523019cf64fd6eca8c77d98c2a146dcedd51bf6c61c1f7cacbce3ab20c8606930cc42737e17f2703cf0980aef560768d1ac5585c05a60a5f94db15f5ac4d4df5cbd81430878d4e9b77346e3a6538b80b80873e3e6c37860470091979296631440adb8cc71991aba2a4dd2884764878306fe774a25512cfbf080f2829ea2903ffa748dd187c21aef918ee3436a1bd336c3d09cc1f748d7528db90a98f69078b82c4d23de7bcec092a292d2b8cac71a5c87d008f128b89a5e608a4501aef41e9f17e4056ed4767957188f780159daebf327751386980b0fca5a2d36b141acff957f46ce2381897099619475db9d3a613e7ef98b056f42b4d6eafb1d62eebbe46a7502f893fbd36ccfb12a280f45ffb93f050eb280bf0a6cd640abdea8590bffb98bdb29ee3a31daa0fa3ab35fee11dc1b7d1fcea82b0e284b2e35b34e77c3f401ed887e7fc6c97b327f76f99caca2f355afa2753a8923bfb06fb2a9df08d31c93882e34ef5a3cccc9d078855334bdf909ae418b177724c42fb1d586d212c4474932acce295236030f4379158957300fe9fdc5cc9145e3ded50cf9f5a8e19321961536c4a47fffc3eb4383fb78a5d2aeed5b45b92132b5e2a53e3b67841fa2e1bd217ee2c30812c4eb1bd4f8c85b328e23d27f12a2fad5c6b236c87f8fd1aad441416e53ebd4d45d4bf601b94eb37dc9a065218ae58e69dba1250bb20626baeda961b3ef11d217697e73f41fa3870d726a032bc4a388fb12c023822945df058e22f54e5f6377eab34297c57883515204fc189d0d4b0ad9bacb24acf7f9d55e7c6368bb8ababd7622f586ec22683306c5d88d5244219a3952adbd85c89893a441a58b532e15600cd5afdbb5b441e1670b72656c7995189bdf993154e09912db8c4ddaff0e75591720230cf99c8b71cd841dffc4372c5e0f9ff906a379d28d6884351609bf7c849ebfabfb049ae986bbb8467251dbf5ccdd05a86ff6ce1392f7ca1bd49595ad9ad805d71b389afab1865f7f69dc24662af19934f025ced212536509500c132aec000000068b991bed50319a6cb9ff040b92f1563889b3787c37145fc9737d4643f66ade33ebd85a2c29b8c64a581cff01b89d59807d6fade2d2c88872f77d0ed83d97c4b5438681d0b95feb973125e4ee70ebe11699290b831e86571e36513a71f159d48ce563f6814cc2a89851d2520c5275b34cc83614cab14c0d197166580d800ee6b9004b8fd72daac8d73c36c1623c37be93ba49a06c4efde238a3a10a05daba5d4942f7de52648af2be31f33e723b3605346282f5d5e356c5d0004eea40fe0b80abf658f6c96c56319ab53d7fefb5879e0136d1cf320973a2f47c1ee3d21554910f09d17afac4607657c4309890957a4954bf86e2a8491ba37dd88b2c3fe3c7edebd767c400bc23e40d165b27133c726b90bc26cbb2a86a6aa400c47aa7ffc538388de8490b9349afa53b814ffe2a56ff16a496e9648284193754f989f6f12aeb6e":"0000000600000004d96bb26744d99ef624e32161c36d3d6efcdd0484e2b17a6dd183125be4b1af1cda931a91a3acb1151877c174f7943fd9":MBEDTLS_ERR_LMS_VERIFY_FAILED
 
 LMS import/export test
 # This test uses a randomly generated LMS public key. It imports the key, and
diff --git a/tests/suites/test_suite_lms.function b/tests/suites/test_suite_lms.function
index 9c966cf..f69ca9e 100644
--- a/tests/suites/test_suite_lms.function
+++ b/tests/suites/test_suite_lms.function
@@ -97,35 +97,35 @@
     /* Test negative cases if the input data is valid */
     if( expected_rc == 0 )
     {
-        /* Altering first message byte must cause verification failure */
-        msg->x[0] ^= 1;
-        TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
-                   MBEDTLS_ERR_LMS_VERIFY_FAILED);
-        msg->x[0] ^= 1;
+        if( msg->len >= 1 )
+        {
+            /* Altering first message byte must cause verification failure */
+            msg->x[0] ^= 1;
+            TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
+                       MBEDTLS_ERR_LMS_VERIFY_FAILED);
+            msg->x[0] ^= 1;
 
-        /* Altering last message byte must cause verification failure */
-        msg->x[msg->len - 1] ^= 1;
-        TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
-                   MBEDTLS_ERR_LMS_VERIFY_FAILED);
-        msg->x[msg->len - 1] ^= 1;
+            /* Altering last message byte must cause verification failure */
+            msg->x[msg->len - 1] ^= 1;
+            TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
+                       MBEDTLS_ERR_LMS_VERIFY_FAILED);
+            msg->x[msg->len - 1] ^= 1;
+        }
 
-        /* Altering first signature byte must cause verification failure */
-        sig->x[0] ^= 1;
-        TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
-                   MBEDTLS_ERR_LMS_VERIFY_FAILED);
-        sig->x[0] ^= 1;
+        if( sig->len >= 1 )
+        {
+            /* Altering first signature byte must cause verification failure */
+            sig->x[0] ^= 1;
+            TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
+                       MBEDTLS_ERR_LMS_VERIFY_FAILED);
+            sig->x[0] ^= 1;
 
-        /* Altering first signature byte must cause verification failure */
-        sig->x[0] ^= 1;
-        TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
-                   MBEDTLS_ERR_LMS_VERIFY_FAILED);
-        sig->x[0] ^= 1;
-
-        /* Altering last signature byte must cause verification failure */
-        sig->x[sig->len - 1] ^= 1;
-        TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
-                   MBEDTLS_ERR_LMS_VERIFY_FAILED);
-        sig->x[sig->len - 1] ^= 1;
+            /* Altering last signature byte must cause verification failure */
+            sig->x[sig->len - 1] ^= 1;
+            TEST_EQUAL(mbedtls_lms_verify( &ctx, msg->x, msg->len, sig->x, sig->len ),
+                       MBEDTLS_ERR_LMS_VERIFY_FAILED);
+            sig->x[sig->len - 1] ^= 1;
+        }
 
         /* Signatures of all sizes must not verify, whether shorter or longer */
         for( size = 0; size < sig->len; size++ ) {