use DHUK to wrap/unwrap seed value used for token #159
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JacobBarthelmeh
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Pull request overview
Adds DHUK-based wrapping/unwrapping for the token seed when persisting it to storage (STM32U5), so the seed used for deriving the token key is not stored in plaintext.
Changes:
- Introduced DHUK AES-CBC wrapping format for the stored token seed (length + IV + ciphertext).
- Routed token load/store seed read/write through new DHUK-aware helpers when
WOLFSSL_STM32U5_DHUKis enabled. - Minor clarifying comment in user login path about re-deriving the token key from PIN + seed.
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JacobBarthelmeh
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wolfSSL-Bot and
JacobBarthelmeh and unassigned
JacobBarthelmeh and
wolfSSL-Bot
SparkiDev
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Feb 13, 2026
| FIELD_SIZE(WP11_Token, userLastFailedLogin) + | ||
| FIELD_SIZE(WP11_Token, userFailLoginTimeout) + | ||
| #ifdef WOLFSSL_STM32U5_DHUK | ||
| (sizeof(word32) + 16 + PIN_SEED_SZ) + /* length + IV + encrypted seed */ |
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