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pk: manage parse and write for the new format

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Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
2023-05-18 18:56:59 +02:00
parent b536126183
commit 00e8dd15d2
2 changed files with 138 additions and 39 deletions
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124
library/pkparse.c
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@@ -514,6 +514,9 @@ static int pk_use_ecparams(const mbedtls_asn1_buf *params, mbedtls_pk_context *p
#endif
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
ret = pk_update_psa_ecparams(pk, grp_id);
#else
/* grp may already be initialized; if so, make sure IDs match */
if (mbedtls_pk_ec_ro(*pk)->grp.id != MBEDTLS_ECP_DP_NONE &&
mbedtls_pk_ec_ro(*pk)->grp.id != grp_id) {
@@ -524,8 +527,6 @@ static int pk_use_ecparams(const mbedtls_asn1_buf *params, mbedtls_pk_context *p
grp_id)) != 0) {
return ret;
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
ret = pk_update_psa_ecparams(pk, grp_id);
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
return ret;
@@ -539,20 +540,26 @@ static int pk_derive_public_key(mbedtls_pk_context *pk,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
{
int ret;
mbedtls_ecp_keypair *eck = (mbedtls_ecp_keypair *) pk->pk_ctx;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status, destruction_status;
psa_status_t status;
(void) f_rng;
(void) p_rng;
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
(void) d;
(void) d_len;
status = psa_export_public_key(pk->priv_id, pk->pub_raw, sizeof(pk->pub_raw),
&pk->pub_raw_len);
ret = psa_pk_status_to_mbedtls(status);
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
mbedtls_ecp_keypair *eck = (mbedtls_ecp_keypair *) pk->pk_ctx;
unsigned char key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
size_t key_len;
mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT;
size_t curve_bits;
psa_ecc_family_t curve = mbedtls_ecc_group_to_psa(eck->grp.id, &curve_bits);
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
unsigned char key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
size_t key_len;
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
(void) f_rng;
(void) p_rng;
psa_status_t destruction_status;
psa_set_key_type(&key_attr, PSA_KEY_TYPE_ECC_KEY_PAIR(curve));
psa_set_key_usage_flags(&key_attr, PSA_KEY_USAGE_EXPORT);
@@ -563,12 +570,7 @@ static int pk_derive_public_key(mbedtls_pk_context *pk,
return ret;
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
status = psa_export_public_key(key_id, pk->pub_raw, sizeof(pk->pub_raw),
&pk->pub_raw_len);
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
status = psa_export_public_key(key_id, key_buf, sizeof(key_buf), &key_len);
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
ret = psa_pk_status_to_mbedtls(status);
destruction_status = psa_destroy_key(key_id);
if (ret != 0) {
@@ -576,10 +578,10 @@ static int pk_derive_public_key(mbedtls_pk_context *pk,
} else if (destruction_status != PSA_SUCCESS) {
return psa_pk_status_to_mbedtls(destruction_status);
}
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
ret = mbedtls_ecp_point_read_binary(&eck->grp, &eck->Q, key_buf, key_len);
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
#else /* MBEDTLS_USE_PSA_CRYPTO */
mbedtls_ecp_keypair *eck = (mbedtls_ecp_keypair *) pk->pk_ctx;
(void) d;
(void) d_len;
@@ -597,21 +599,21 @@ static int pk_use_ecparams_rfc8410(const mbedtls_asn1_buf *params,
mbedtls_ecp_group_id grp_id,
mbedtls_pk_context *pk)
{
mbedtls_ecp_keypair *ecp = mbedtls_pk_ec_rw(*pk);
int ret;
if (params->tag != 0 || params->len != 0) {
return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
ret = pk_update_psa_ecparams(pk, grp_id);
#else
mbedtls_ecp_keypair *ecp = mbedtls_pk_ec_rw(*pk);
ret = mbedtls_ecp_group_load(&(ecp->grp), grp_id);
if (ret != 0) {
return ret;
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
ret = pk_update_psa_ecparams(pk, grp_id);
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
#endif
return ret;
}
@@ -624,7 +626,6 @@ static int pk_parse_key_rfc8410_der(mbedtls_pk_context *pk,
unsigned char *key, size_t keylen, const unsigned char *end,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
{
mbedtls_ecp_keypair *eck = mbedtls_pk_ec_rw(*pk);
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t len;
@@ -636,23 +637,54 @@ static int pk_parse_key_rfc8410_der(mbedtls_pk_context *pk,
return MBEDTLS_ERR_PK_KEY_INVALID_FORMAT;
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_status_t status;
psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(pk->ec_family));
/* Setting largest masks for usage and key algorithms */
psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH |
PSA_KEY_USAGE_SIGN_MESSAGE |
PSA_KEY_USAGE_EXPORT);
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
psa_set_key_algorithm(&attributes,
PSA_ALG_DETERMINISTIC_ECDSA(PSA_ALG_ANY_HASH));
#else
psa_set_key_algorithm(&attributes, PSA_ALG_ECDSA(PSA_ALG_ANY_HASH));
#endif
status = psa_import_key(&attributes, key, len, &pk->priv_id);
if (status != PSA_SUCCESS) {
ret = psa_pk_status_to_mbedtls(status);
return ret;
}
#else /* MBEDTLS_PK_USE_PSA_EC_DATA */
mbedtls_ecp_keypair *eck = mbedtls_pk_ec_rw(*pk);
if ((ret = mbedtls_mpi_read_binary_le(&eck->d, key, len)) != 0) {
mbedtls_ecp_keypair_free(eck);
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
/* pk_parse_key_pkcs8_unencrypted_der() only supports version 1 PKCS8 keys,
* which never contain a public key. As such, derive the public key
* unconditionally. */
if ((ret = pk_derive_public_key(pk, key, len, f_rng, p_rng)) != 0) {
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
mbedtls_ecp_keypair_free(eck);
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
return ret;
}
/* When MBEDTLS_PK_USE_PSA_EC_DATA the key is checked while importing it
* into PSA. */
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if ((ret = mbedtls_ecp_check_privkey(&eck->grp, &eck->d)) != 0) {
mbedtls_ecp_keypair_free(eck);
return ret;
}
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
return 0;
}
@@ -926,7 +958,7 @@ int mbedtls_pk_parse_subpubkey(unsigned char **p, const unsigned char *end,
#if defined(MBEDTLS_ECP_LIGHT)
if (pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY) {
#if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
if (mbedtls_pk_is_rfc8410_curve(ec_grp_id)) {
if (MBEDTLS_PK_IS_RFC8410_GROUP_ID(ec_grp_id)) {
ret = pk_use_ecparams_rfc8410(&alg_params, ec_grp_id, pk);
} else
#endif
@@ -1158,6 +1190,12 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
unsigned char *end = p + keylen;
unsigned char *end2;
mbedtls_ecp_keypair *eck = mbedtls_pk_ec_rw(*pk);
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_status_t status;
uint8_t priv_key_raw[MBEDTLS_PSA_MAX_EC_KEY_PAIR_LENGTH];
size_t priv_key_len;
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
/*
* RFC 5915, or SEC1 Appendix C.4
@@ -1190,10 +1228,19 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
d = p;
d_len = len;
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if (len > MBEDTLS_PSA_MAX_EC_KEY_PAIR_LENGTH) {
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
}
memcpy(priv_key_raw, p, len);
priv_key_len = len;
#else
if ((ret = mbedtls_mpi_read_binary(&eck->d, p, len)) != 0) {
mbedtls_ecp_keypair_free(eck);
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
}
#endif
p += len;
@@ -1252,6 +1299,27 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
}
}
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(pk->ec_family));
/* Setting largest masks for usage and key algorithms */
psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH |
PSA_KEY_USAGE_SIGN_MESSAGE |
PSA_KEY_USAGE_EXPORT);
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
psa_set_key_algorithm(&attributes,
PSA_ALG_DETERMINISTIC_ECDSA(PSA_ALG_ANY_HASH));
#else
psa_set_key_algorithm(&attributes, PSA_ALG_ECDSA(PSA_ALG_ANY_HASH));
#endif
status = psa_import_key(&attributes, priv_key_raw, priv_key_len,
&pk->priv_id);
if (status != PSA_SUCCESS) {
ret = psa_pk_status_to_mbedtls(status);
return ret;
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
if (!pubkey_done) {
if ((ret = pk_derive_public_key(pk, d, d_len, f_rng, p_rng)) != 0) {
mbedtls_ecp_keypair_free(eck);
@@ -1259,10 +1327,12 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
}
}
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if ((ret = mbedtls_ecp_check_privkey(&eck->grp, &eck->d)) != 0) {
mbedtls_ecp_keypair_free(eck);
return ret;
}
#endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
return 0;
}
@@ -1363,7 +1433,7 @@ static int pk_parse_key_pkcs8_unencrypted_der(
#if defined(MBEDTLS_ECP_LIGHT)
if (pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH) {
#if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
if (mbedtls_pk_is_rfc8410_curve(ec_grp_id)) {
if (MBEDTLS_PK_IS_RFC8410_GROUP_ID(ec_grp_id)) {
if ((ret =
pk_use_ecparams_rfc8410(&params, ec_grp_id, pk)) != 0 ||
(ret =