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Move crc to crypto utils.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2026-01-29 16:02:44 +01:00
parent 2f77e1c3fa
commit 56f4fca657
2 changed files with 14 additions and 0 deletions
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13
src/crypto_utils.c
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@@ -278,3 +278,16 @@ mbedtls_ecp_group_id ec_get_curve_from_prime(const uint8_t *prime, size_t prime_
} }
return MBEDTLS_ECP_DP_NONE; return MBEDTLS_ECP_DP_NONE;
} }
#define POLY 0xedb88320
uint32_t crc32c(const uint8_t *buf, size_t len) {
uint32_t crc = 0xffffffff;
while (len--) {
crc ^= *buf++;
for (int k = 0; k < 8; k++) {
crc = (crc >> 1) ^ (POLY & (0 - (crc & 1)));
}
}
return ~crc;
}

1
src/crypto_utils.h
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@@ -56,5 +56,6 @@ extern int aes_decrypt(const uint8_t *key, const uint8_t *iv, uint16_t key_size,
extern int aes_encrypt_cfb_256(const uint8_t *key, const uint8_t *iv, uint8_t *data, uint16_t len); extern int aes_encrypt_cfb_256(const uint8_t *key, const uint8_t *iv, uint8_t *data, uint16_t len);
extern int aes_decrypt_cfb_256(const uint8_t *key, const uint8_t *iv, uint8_t *data, uint16_t len); extern int aes_decrypt_cfb_256(const uint8_t *key, const uint8_t *iv, uint8_t *data, uint16_t len);
extern mbedtls_ecp_group_id ec_get_curve_from_prime(const uint8_t *prime, size_t prime_len); extern mbedtls_ecp_group_id ec_get_curve_from_prime(const uint8_t *prime, size_t prime_len);
extern uint32_t crc32c(const uint8_t *buf, size_t len);
#endif #endif