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Added v2 for encryption utilities.

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Version 1 derives an encryption key without dependence on OTP.
Version 2 derives an encryption key with dependence on OTP.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2026-03-19 18:11:53 +01:00
parent a9ac2779b7
commit 89a8042634
2 changed files with 23 additions and 6 deletions
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5
src/crypto_utils.h
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@@ -43,10 +43,11 @@ extern int ct_memcmp(const void *a, const void *b, size_t n);
extern void derive_kbase(uint8_t kbase[32]);
extern void derive_kver(const uint8_t *pin, size_t pin_len, uint8_t kver[32]);
extern void pin_derive_kenc(const uint8_t pin_token[32], uint8_t kenc[32]);
extern void pin_derive_kenc2(const uint8_t pin_token[32], uint8_t kenc[32]);
extern void pin_derive_session(const uint8_t *pin, size_t pin_len, uint8_t pin_token[32]);
extern void pin_derive_verifier(const uint8_t *pin, size_t pin_len, uint8_t verifier[32]);
extern int encrypt_with_aad(const uint8_t key[32], const uint8_t *in_buf, size_t in_len, uint8_t *out_buf);
extern int decrypt_with_aad(const uint8_t key[32], const uint8_t *in_buf, size_t in_len, uint8_t *out_buf);
extern int encrypt_with_aad(const uint8_t key[32], const uint8_t *in_buf, size_t in_len, uint8_t version, uint8_t *out_buf);
extern int decrypt_with_aad(const uint8_t key[32], const uint8_t *in_buf, size_t in_len, uint8_t version, uint8_t *out_buf);
extern void double_hash_pin(const uint8_t *pin, uint16_t len, uint8_t output[32]);
extern void hash_multi(const uint8_t *input, uint16_t len, uint8_t output[32]);
extern void hash256(const uint8_t *input, size_t len, uint8_t output[32]);