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Fix nonce size for AES-GCM #283

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merged 2 commits into from
Jul 18, 2024
Merged

Fix nonce size for AES-GCM #283

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eb0ee9f
fix: IV size for AES-GCM
kentakayama Jul 15, 2024
dc47589
del: IV size for AES-KW
kentakayama Jul 15, 2024
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16 changes: 8 additions & 8 deletions src/t_cose_util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -256,20 +256,20 @@ uint32_t
bits_iv_alg(int32_t cose_algorithm_id)
{
switch(cose_algorithm_id) {
case T_COSE_ALGORITHM_AES128CCM_16_128:
case T_COSE_ALGORITHM_A128KW:
case T_COSE_ALGORITHM_A128GCM:
case T_COSE_ALGORITHM_A192GCM:
case T_COSE_ALGORITHM_A256GCM:
return 96; /* 12 bytes, 4.1 of RFC 9053 */
case T_COSE_ALGORITHM_AES128CCM_16_128:
case T_COSE_ALGORITHM_AES256CCM_16_128:
return 104; /* 13 bytes, 4.2 of RFC 9053 */
case T_COSE_ALGORITHM_A128CTR:
case T_COSE_ALGORITHM_A128CBC:
case T_COSE_ALGORITHM_A192CTR:
case T_COSE_ALGORITHM_A192CBC:
case T_COSE_ALGORITHM_A256CTR:
case T_COSE_ALGORITHM_A256CBC: return 128;
case T_COSE_ALGORITHM_A192KW:
case T_COSE_ALGORITHM_A192GCM: return 192;
case T_COSE_ALGORITHM_AES256CCM_16_128:
case T_COSE_ALGORITHM_A256KW:
case T_COSE_ALGORITHM_A256GCM: return 256;
case T_COSE_ALGORITHM_A256CBC:
return 128; /* 16 bytes, the same length of the AES block size */
default: return UINT32_MAX;
}
}
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