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pkparse: parse also Weierstrass private keys using ecp_read_key()

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This is to hanlde more uniformly Weierstrass and Montgomery curves.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2023-06-30 17:32:57 +02:00
parent 5f54020d1a
commit 6b062eeed0
1 changed files with 9 additions and 6 deletions
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15
library/pkparse.c
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@ -1217,15 +1217,11 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
}
/* Keep a reference to the position fo the private key. It will be used
* later in this function. */
d = p;
d_len = len;
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if ((ret = mbedtls_mpi_read_binary(&eck->d, p, len)) != 0) {
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
}
#endif
p += len;
pubkey_done = 0;
@ -1245,6 +1241,13 @@ static int pk_parse_key_sec1_der(mbedtls_pk_context *pk,
}
}
#if !defined(MBEDTLS_PK_USE_PSA_EC_DATA)
if ((ret = mbedtls_ecp_read_key(eck->grp.id, eck, d, d_len)) != 0) {
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret);
}
#endif
if (p != end) {
/*
* Is 'publickey' present? If not, or if we can't read it (eg because it