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simutil: Memzero secrets after use

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Also slightly simplify eap_aka_prf_prime and other functions.
This commit is contained in:
Andrew Zaborowski 2019-03-19 01:25:25 +01:00 committed by Denis Kenzior
parent c80b239b93
commit 28840b29a8
1 changed files with 7 additions and 0 deletions
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7
src/simutil.c
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@ -161,6 +161,8 @@ bool eap_aka_derive_primes(const uint8_t *ck, const uint8_t *ik,
memcpy(key + EAP_AKA_CK_LEN, ik, EAP_AKA_IK_LEN);
hmac = l_checksum_new_hmac(L_CHECKSUM_SHA256, key, 32);
explicit_bzero(key, sizeof(key));
if (!hmac)
return false;
@ -181,6 +183,7 @@ bool eap_aka_derive_primes(const uint8_t *ck, const uint8_t *ik,
memcpy(ck_p, digest, EAP_AKA_CK_LEN);
memcpy(ik_p, digest + EAP_AKA_CK_LEN, EAP_AKA_IK_LEN);
explicit_bzero(digest, sizeof(digest));
return true;
}
@ -204,6 +207,8 @@ bool eap_aka_prf_prime(const uint8_t *ik_p, const uint8_t *ck_p,
memcpy(key + EAP_AKA_IK_LEN, ck_p, EAP_AKA_CK_LEN);
hmac = l_checksum_new_hmac(L_CHECKSUM_SHA256, key, 32);
explicit_bzero(key, sizeof(key));
if (!hmac)
return false;
@ -229,6 +234,7 @@ bool eap_aka_prf_prime(const uint8_t *ik_p, const uint8_t *ck_p,
iov[0].iov_len = 32;
}
explicit_bzero(digest, sizeof(digest));
l_checksum_free(hmac);
pos = out;
@ -242,6 +248,7 @@ bool eap_aka_prf_prime(const uint8_t *ik_p, const uint8_t *ck_p,
pos += EAP_SIM_MSK_LEN;
memcpy(emsk, pos, EAP_SIM_EMSK_LEN);
explicit_bzero(out, sizeof(out));
return true;
}