`t_cose_examples` Tests Failing

[aahajj]

Issue Description

Hey,
I have tried to run the files generated by Makefile.test, namely t_cose_examples and t_cose_test.

While all tests in t_cose_test have passed, none of the tests in t_cose_examples passed.

I did some initial debugging, focusing on the encrypt0_example to find the reason for the failure. It returned error code 95 (T_COSE_ERR_UNPROCESSED_TAG_NUMBERS).

The error was returned from the function t_cose_encrypt_dec_detached_msg in t_cose_encrypt_dec.c, which calls t_cose_encrypt_dec_main_private (also in t_cose_encrypt_dec.c).
That function, in turn, calls t_cose_process_tag_numbers_qcbor1 in t_cose_util.c, and this function raised the error when calling t_cose_process_tag_numbers_qcbor1_t_cose1.

I could not fully understand the reason for this error and would appreciate any help with resolving it.
Thank you in advance!

System Information

• OS: Linux private 6.13.8-arch1-1 (#1 SMP PREEMPT_DYNAMIC, Sun, 23 Mar 2025 17:17:30 +0000) x86_64 GNU/Linux the
• GCC Version: cc (GCC) 14.2.1 20250207
• OpenSSL Version: 3.4.1 (Library: OpenSSL 3.4.1, 11 Feb 2025)

Build Details

• QCBOR: Built from the current master branch
• t_cose: Built from the dev branch

[aahajj]

update: 4 out of the 9 tests fail when generated from Makefile.ossl.

./t_cose_examples

---- START EXAMPLE one_step_sign  ----
Create COSE_Sign1 with ES256
Encoded payload (size = 97): 0 (success)
Made EC key with curve prime256v1: 0 (success)
Initialized t_cose and configured signing key
Finished signing: 0 (success)
COSE_Sign1 message:    172 bytes
    d2 84 43 a1 01 26 a0 58 61 a6 69 42 65 69 6e 67 
    54 79 70 65 68 48 75 6d 61 6e 6f 69 64 68 47 72 
    65 65 74 69 6e 67 70 57 65 20 63 6f 6d 65 20 69 
    6e 20 70 65 61 63 65 68 41 72 6d 43 6f 75 6e 74 
    02 69 48 65 61 64 43 6f 75 6e 74 01 69 42 72 61 
    69 6e 53 69 7a 65 66 6d 65 64 69 75 6d 6b 44 72 
    69 6e 6b 73 57 61 74 65 72 f5 58 40 0b a6 c7 f6 
    ce 5f 9c d4 c1 93 f3 ca 30 40 09 25 12 6e ad 58 
    ca 78 b8 b5 16 dd 61 6e 35 ef b7 22 c2 36 61 dc 
    f7 bf 17 22 6b 84 de ae 8d d0 d9 c3 07 6f b8 df 
    04 00 ba 05 52 b8 b0 0e 98 4b 1a 28 

Initialized t_cose for verification and set verification key
Verification complete: 95 (fail)
---- FAILED EXAMPLE one_step_sign (95) ----


---- START EXAMPLE two_step_sign  ----
Create COSE_Sign1 with ES256
Made EC key with curve prime256v1: 0 (success)
Initialized QCBOR, t_cose and configured signing key
Encoded COSE headers: 0 (success)
Payload encoded
Fnished signing: 0 (success)
Finished CBOR encoding: 0 (success)
COSE_Sign1:    172 bytes
    d2 84 43 a1 01 26 a0 58 61 a6 69 42 65 69 6e 67 
    54 79 70 65 68 48 75 6d 61 6e 6f 69 64 68 47 72 
    65 65 74 69 6e 67 70 57 65 20 63 6f 6d 65 20 69 
    6e 20 70 65 61 63 65 68 41 72 6d 43 6f 75 6e 74 
    02 69 48 65 61 64 43 6f 75 6e 74 01 69 42 72 61 
    69 6e 53 69 7a 65 66 6d 65 64 69 75 6d 6b 44 72 
    69 6e 6b 73 57 61 74 65 72 f5 58 40 06 b7 1d 14 
    01 36 bb 55 5a 23 06 85 52 ca 48 cc 87 fc de 7c 
    f4 f0 8d 5b df 2c 6b 87 4d e6 0f 1d 19 78 53 dd 
    0b 1c a7 2d ed a1 1f 2a 7a de b0 f5 62 09 dc b6 
    d0 23 36 6b 23 b4 de a3 af ab ce 8f 

Initialized t_cose for verification and set verification key
Verification complete: 95 (fail)
---- FAILED EXAMPLE two_step_sign (95) ----


---- START EXAMPLE one_step_multi_sign_detached  ----
Create COSE_Sign with ES384 and PS256 signatures
Made EC key with curve prime256v1: 0 (success)
Made RSA key: 0 (success)
Initialized t_cose and configured signing key
Finished signing: 0 (success)
COSE_Sign message with two COSE_Signatures:    217 bytes
    d8 62 84 40 a0 f6 82 83 44 a1 01 38 22 a0 58 60 
    2d 9e c8 34 5e 40 d1 4b 90 13 98 11 39 ec 0a 5b 
    ec f9 79 0a 5c 0e 01 6f 0a b5 af a4 a2 ff 60 a3 
    db 40 51 54 d5 31 a7 5d 10 37 66 ad d7 56 cf 51 
    c4 fc d3 f8 95 88 00 3d ab 47 98 d1 eb ba c3 81 
    da ce 20 99 27 d7 22 9c ff f8 f4 2c 59 9f af 70 
    05 0c 46 f3 b8 cd 69 61 79 af 9c 6b e6 50 37 89 
    83 44 a1 01 38 22 a0 58 60 72 fb 62 14 f4 31 3f 
    2c d6 85 b8 ee 48 c7 12 30 58 d8 0a 45 59 6c e5 
    73 3c 69 d8 8a c6 bd 4a ac 82 69 83 ee a9 de d1 
    27 86 3f a2 61 0b 02 55 6c a2 f7 9d ce 6f 89 36 
    8a c8 97 ef a5 cc 43 d4 c4 cf 61 e0 01 b7 37 21 
    07 39 be d8 89 33 40 e1 b7 91 3a 9f b4 32 5d a6 
    65 58 f3 06 df ef 21 02 d6 

Initialized t_cose for verification
Verification complete: 0 (success)
---- COMPLETED EXAMPLE one_step_multi_sign_detached (0) ----


---- START EXAMPLE one_step_sign  ----
Create COSE_Sign1 with ES256
Encoded payload (size = 97): 0 (success)
Made EC key with curve prime256v1: 0 (success)
Initialized t_cose and configured signing key
Finished signing: 0 (success)
COSE_Sign1 message:    172 bytes
    d2 84 43 a1 01 26 a0 58 61 a6 69 42 65 69 6e 67 
    54 79 70 65 68 48 75 6d 61 6e 6f 69 64 68 47 72 
    65 65 74 69 6e 67 70 57 65 20 63 6f 6d 65 20 69 
    6e 20 70 65 61 63 65 68 41 72 6d 43 6f 75 6e 74 
    02 69 48 65 61 64 43 6f 75 6e 74 01 69 42 72 61 
    69 6e 53 69 7a 65 66 6d 65 64 69 75 6d 6b 44 72 
    69 6e 6b 73 57 61 74 65 72 f5 58 40 5b 7a cb 3e 
    5f 0c e4 d8 12 49 54 36 51 ae d6 78 c3 a4 74 23 
    90 c7 2e 40 ec 0f 5a 51 31 82 be 27 e3 b7 6d 0f 
    76 6a 0b 3d 23 62 67 9b f9 1f 35 35 38 62 42 0a 
    c0 0a 97 30 1b 02 65 13 17 60 95 ce 

Initialized t_cose for verification and set verification key
Verification complete: 0 (success)
Verifyed payload:    97 bytes
    a6 69 42 65 69 6e 67 54 79 70 65 68 48 75 6d 61 
    6e 6f 69 64 68 47 72 65 65 74 69 6e 67 70 57 65 
    20 63 6f 6d 65 20 69 6e 20 70 65 61 63 65 68 41 
    72 6d 43 6f 75 6e 74 02 69 48 65 61 64 43 6f 75 
    6e 74 01 69 42 72 61 69 6e 53 69 7a 65 66 6d 65 
    64 69 75 6d 6b 44 72 69 6e 6b 73 57 61 74 65 72 
    f5 
---- COMPLETED EXAMPLE one_step_sign (0) ----


---- START EXAMPLE two_step_sign  ----
Create COSE_Sign1 with ES256
Made EC key with curve prime256v1: 0 (success)
Initialized QCBOR, t_cose and configured signing key
Encoded COSE headers: 0 (success)
Payload added
Fnished signing: 0 (success)
Finished CBOR encoding: 0 (success)
COSE_Sign1:    172 bytes
    d2 84 43 a1 01 26 a0 58 61 a6 69 42 65 69 6e 67 
    54 79 70 65 68 48 75 6d 61 6e 6f 69 64 68 47 72 
    65 65 74 69 6e 67 70 57 65 20 63 6f 6d 65 20 69 
    6e 20 70 65 61 63 65 68 41 72 6d 43 6f 75 6e 74 
    02 69 48 65 61 64 43 6f 75 6e 74 01 69 42 72 61 
    69 6e 53 69 7a 65 66 6d 65 64 69 75 6d 6b 44 72 
    69 6e 6b 73 57 61 74 65 72 f5 58 40 65 1b de d1 
    0c 98 f7 ac 30 5c 52 46 11 8c 93 f1 74 bd 0d d1 
    1c 6d d4 9a 82 fe fc 47 3d 4c 6c ce ec a5 40 aa 
    88 ca 50 92 6f cc 2c 59 e0 23 06 47 c8 8a da 1d 
    02 9f 94 4b f3 27 c3 27 57 75 aa ab 

Initialized t_cose for verification and set verification key
Verification complete: 0 (success)
Verified payload:    97 bytes
    a6 69 42 65 69 6e 67 54 79 70 65 68 48 75 6d 61 
    6e 6f 69 64 68 47 72 65 65 74 69 6e 67 70 57 65 
    20 63 6f 6d 65 20 69 6e 20 70 65 61 63 65 68 41 
    72 6d 43 6f 75 6e 74 02 69 48 65 61 64 43 6f 75 
    6e 74 01 69 42 72 61 69 6e 53 69 7a 65 66 6d 65 
    64 69 75 6d 6b 44 72 69 6e 6b 73 57 61 74 65 72 
    f5 
---- COMPLETED EXAMPLE two_step_sign (0) ----


---- START EXAMPLE encrypt0  ----
Create COSE_Encrypt0 with detached payload using A128GCM
COSE_Encrypt0:     22 bytes
    d0 83 43 a1 01 01 a1 05 4c eb ab 45 fe dc b9 fb 
    43 c5 25 db 03 f6 
Detached ciphertext:     41 bytes
    f8 d7 d9 31 4e b5 a0 3f 62 55 6c b0 48 00 55 dc 
    7b d6 aa 60 0c 23 a2 52 ea 6b b7 31 bf 7f d5 fd 
    28 a7 48 bd 10 2f fe b5 cb 

Completed encryption; starting decryption

Decryption failed 95!
---- FAILED EXAMPLE encrypt0 (95) ----


---- START EXAMPLE key_wrap ----
Create COSE_Encrypt with detached payload using AES-KW
COSE_Encrypt:     62 bytes
    d8 60 84 43 a1 01 01 a1 05 4c 6b 3b 73 af 93 38 
    6a 85 20 89 66 fe f6 81 83 40 a2 01 22 04 45 4b 
    69 64 20 41 58 18 60 1d a6 af 08 fa c6 7d 0e 22 
    69 c9 17 05 cc 46 46 4c 7e a9 96 b0 d8 76 
Detached Ciphertext:     41 bytes
    f7 42 29 99 2a ed d3 bf c7 27 0a a1 56 ab 08 27 
    82 ec 50 4e d1 13 61 95 51 0f d9 21 9b f4 07 cf 
    ec 2b c8 ce 41 8d 6d f6 7a 

---- FAILED EXAMPLE key_wrap (95) ----


---- START EXAMPLE ESDH ----
Create COSE_Encrypt with attached payload using ESDH

COSE_Encrypt:     180 bytes
    d8 60 84 43 a1 01 01 a1 05 4c 61 5e d2 73 b4 9d 
    85 b7 26 7b e7 e9 58 23 81 07 db e8 4e 73 77 e4 
    18 f7 08 da 5d b9 50 f9 02 b1 6c 95 cb 8b 23 aa 
    c4 7d f4 ed 07 49 3c e2 8a 73 3a 81 83 44 a1 01 
    38 1c a2 20 a4 01 02 20 01 21 58 20 3a 91 22 59 
    9d 55 d0 94 54 c9 e1 4f 39 e9 e5 3a b6 35 0b ec 
    96 57 df 84 80 5b 7a ac f1 69 2f b5 22 58 20 56 
    6a f6 09 2d 1e c6 ba bd 44 ed 95 70 cf a2 8b 4b 
    6a b3 9f 08 f0 09 74 cf ce d8 3b d9 ed aa 75 04 
    49 72 65 63 69 70 69 65 6e 74 58 18 6f ed 9e 9c 
    ba f2 89 59 85 32 4e b4 7a f1 23 f7 43 fa 17 1f 
    0f 81 fd ab 
Decrypted Payload:    19 bytes
    54 68 69 73 20 69 73 20 74 68 65 20 70 61 79 6c 
    6f 61 64 
---- COMPLETED EXAMPLE ESDH (0) ----


---- START EXAMPLE ESDH ----
Create COSE_Encrypt with detached payload using ESDH
COSE_Encrypt:     144 bytes
    d8 60 84 43 a1 01 01 a1 05 4c 9c 20 d4 54 7f 87 
    1a 38 95 6a f9 ed f6 81 83 44 a1 01 38 1c a2 20 
    a4 01 02 20 01 21 58 20 71 58 39 37 5e 74 04 1e 
    6e d8 6a 54 ae 37 82 ac fc e8 15 c6 69 05 4a 7f 
    5a b7 c0 ba 35 d7 19 4d 22 58 20 00 bd 93 55 ae 
    fa f0 cb 38 1f ff d9 c0 14 e9 a8 e4 69 77 25 1f 
    00 3e dc 45 cd 9e 52 01 c8 af a0 04 49 72 65 63 
    69 70 69 65 6e 74 58 18 52 64 2e e9 4b 9b a1 56 
    a4 f2 22 89 ff be 1e d2 24 d5 ec cc 06 0c a6 e5 
    
Detached Ciphertext:     35 bytes
    9d bb da 5f 73 53 b8 27 fb 3c 53 c7 12 5a 5b 10 
    9d aa f6 82 ab 79 7a 3a 5b 71 11 6d 5b d3 9e f4 
    71 b5 99 
---- COMPLETED EXAMPLE ESDH (0) ----


4 of 9 EXAMPLES FAILED