mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-03-28 19:21:08 +00:00
pkwrite: reorganize code
This commits just moves code around. The goal is to group together functions by guards and functionality: - RSA, EC, Opaque - internal VS public Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti
parent
854c737db1
commit
605f03cb76
@ -18,9 +18,6 @@
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#if defined(MBEDTLS_RSA_C)
|
||||
#include "mbedtls/rsa.h"
|
||||
#endif
|
||||
#if defined(MBEDTLS_ECP_C)
|
||||
#include "mbedtls/bignum.h"
|
||||
#include "mbedtls/ecp.h"
|
||||
@ -32,9 +29,6 @@
|
||||
#if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_PK_HAVE_ECC_KEYS)
|
||||
#include "pkwrite.h"
|
||||
#endif
|
||||
#if defined(MBEDTLS_ECDSA_C)
|
||||
#include "mbedtls/ecdsa.h"
|
||||
#endif
|
||||
#if defined(MBEDTLS_PEM_WRITE_C)
|
||||
#include "mbedtls/pem.h"
|
||||
#endif
|
||||
@ -45,62 +39,9 @@
|
||||
#endif
|
||||
#include "mbedtls/platform.h"
|
||||
|
||||
/* Helper for Montgomery curves */
|
||||
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
|
||||
#if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
|
||||
static inline int mbedtls_pk_is_rfc8410(const mbedtls_pk_context *pk)
|
||||
{
|
||||
mbedtls_ecp_group_id id = mbedtls_pk_get_group_id(pk);
|
||||
|
||||
#if defined(MBEDTLS_ECP_HAVE_CURVE25519)
|
||||
if (id == MBEDTLS_ECP_DP_CURVE25519) {
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
#if defined(MBEDTLS_ECP_HAVE_CURVE448)
|
||||
if (id == MBEDTLS_ECP_DP_CURVE448) {
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_PEM_WRITE_C)
|
||||
/* It is assumed that the input key is opaque */
|
||||
static psa_ecc_family_t pk_get_opaque_ec_family(const mbedtls_pk_context *pk)
|
||||
{
|
||||
psa_ecc_family_t ec_family = 0;
|
||||
psa_key_attributes_t key_attrs = PSA_KEY_ATTRIBUTES_INIT;
|
||||
|
||||
if (psa_get_key_attributes(pk->priv_id, &key_attrs) != PSA_SUCCESS) {
|
||||
return 0;
|
||||
}
|
||||
ec_family = PSA_KEY_TYPE_ECC_GET_FAMILY(psa_get_key_type(&key_attrs));
|
||||
psa_reset_key_attributes(&key_attrs);
|
||||
|
||||
return ec_family;
|
||||
}
|
||||
#endif /* MBETLS_USE_PSA_CRYPTO && MBEDTLS_PEM_WRITE_C */
|
||||
#endif /* MBEDTLS_PK_HAVE_RFC8410_CURVES */
|
||||
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
|
||||
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
||||
/* It is assumed that the input key is opaque */
|
||||
static psa_key_type_t pk_get_opaque_key_type(const mbedtls_pk_context *pk)
|
||||
{
|
||||
psa_key_attributes_t opaque_attrs = PSA_KEY_ATTRIBUTES_INIT;
|
||||
psa_key_type_t opaque_key_type;
|
||||
|
||||
if (psa_get_key_attributes(pk->priv_id, &opaque_attrs) != PSA_SUCCESS) {
|
||||
return 0;
|
||||
}
|
||||
opaque_key_type = psa_get_key_type(&opaque_attrs);
|
||||
psa_reset_key_attributes(&opaque_attrs);
|
||||
|
||||
return opaque_key_type;
|
||||
}
|
||||
#endif /* MBETLS_USE_PSA_CRYPTO */
|
||||
|
||||
/******************************************************************************
|
||||
* Internal functions for RSA keys.
|
||||
******************************************************************************/
|
||||
#if defined(MBEDTLS_RSA_C)
|
||||
/*
|
||||
* RSAPublicKey ::= SEQUENCE {
|
||||
@ -145,8 +86,119 @@ end_of_export:
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
|
||||
static int pk_write_rsa_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
size_t len = 0;
|
||||
int ret;
|
||||
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
||||
if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_OPAQUE) {
|
||||
uint8_t tmp[PSA_EXPORT_KEY_PAIR_MAX_SIZE];
|
||||
size_t tmp_len = 0;
|
||||
|
||||
if (psa_export_key(pk->priv_id, tmp, sizeof(tmp), &tmp_len) != PSA_SUCCESS) {
|
||||
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
||||
}
|
||||
*p -= tmp_len;
|
||||
memcpy(*p, tmp, tmp_len);
|
||||
len += tmp_len;
|
||||
mbedtls_platform_zeroize(tmp, sizeof(tmp));
|
||||
} else
|
||||
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
||||
{
|
||||
mbedtls_mpi T; /* Temporary holding the exported parameters */
|
||||
mbedtls_rsa_context *rsa = mbedtls_pk_rsa(*pk);
|
||||
|
||||
/*
|
||||
* Export the parameters one after another to avoid simultaneous copies.
|
||||
*/
|
||||
|
||||
mbedtls_mpi_init(&T);
|
||||
|
||||
/* Export QP */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, NULL, NULL, &T)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export DQ */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, NULL, &T, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export DP */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, &T, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export Q */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
&T, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export P */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, &T,
|
||||
NULL, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export D */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
NULL, &T, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export E */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
NULL, NULL, &T)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export N */
|
||||
if ((ret = mbedtls_rsa_export(rsa, &T, NULL,
|
||||
NULL, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
end_of_export:
|
||||
|
||||
mbedtls_mpi_free(&T);
|
||||
if (ret < 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 0));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p,
|
||||
buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
}
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_RSA_C */
|
||||
|
||||
/******************************************************************************
|
||||
* Internal functions for EC keys.
|
||||
******************************************************************************/
|
||||
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
|
||||
#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
|
||||
static int pk_write_ec_pubkey(unsigned char **p, unsigned char *start,
|
||||
@ -215,28 +267,6 @@ static int pk_write_ec_pubkey(unsigned char **p, unsigned char *start,
|
||||
}
|
||||
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
|
||||
|
||||
/*
|
||||
* ECParameters ::= CHOICE {
|
||||
* namedCurve OBJECT IDENTIFIER
|
||||
* }
|
||||
*/
|
||||
static int pk_write_ec_param(unsigned char **p, unsigned char *start,
|
||||
mbedtls_ecp_group_id grp_id)
|
||||
{
|
||||
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
||||
size_t len = 0;
|
||||
const char *oid;
|
||||
size_t oid_len;
|
||||
|
||||
if ((ret = mbedtls_oid_get_oid_by_ec_grp(grp_id, &oid, &oid_len)) != 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_oid(p, start, oid, oid_len));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
|
||||
/*
|
||||
* privateKey OCTET STRING -- always of length ceil(log2(n)/8)
|
||||
*/
|
||||
@ -305,9 +335,174 @@ exit:
|
||||
return ret;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */
|
||||
|
||||
/*
|
||||
* ECParameters ::= CHOICE {
|
||||
* namedCurve OBJECT IDENTIFIER
|
||||
* }
|
||||
*/
|
||||
static int pk_write_ec_param(unsigned char **p, unsigned char *start,
|
||||
mbedtls_ecp_group_id grp_id)
|
||||
{
|
||||
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
||||
size_t len = 0;
|
||||
const char *oid;
|
||||
size_t oid_len;
|
||||
|
||||
if ((ret = mbedtls_oid_get_oid_by_ec_grp(grp_id, &oid, &oid_len)) != 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_oid(p, start, oid, oid_len));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
|
||||
#if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
|
||||
static inline int mbedtls_pk_is_rfc8410(const mbedtls_pk_context *pk)
|
||||
{
|
||||
mbedtls_ecp_group_id id = mbedtls_pk_get_group_id(pk);
|
||||
|
||||
#if defined(MBEDTLS_ECP_HAVE_CURVE25519)
|
||||
if (id == MBEDTLS_ECP_DP_CURVE25519) {
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
#if defined(MBEDTLS_ECP_HAVE_CURVE448)
|
||||
if (id == MBEDTLS_ECP_DP_CURVE448) {
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* RFC8410 section 7
|
||||
*
|
||||
* OneAsymmetricKey ::= SEQUENCE {
|
||||
* version Version,
|
||||
* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
|
||||
* privateKey PrivateKey,
|
||||
* attributes [0] IMPLICIT Attributes OPTIONAL,
|
||||
* ...,
|
||||
* [[2: publicKey [1] IMPLICIT PublicKey OPTIONAL ]],
|
||||
* ...
|
||||
* }
|
||||
* ...
|
||||
* CurvePrivateKey ::= OCTET STRING
|
||||
*/
|
||||
static int pk_write_ec_rfc8410_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
||||
size_t len = 0;
|
||||
size_t oid_len = 0;
|
||||
const char *oid;
|
||||
mbedtls_ecp_group_id grp_id;
|
||||
|
||||
/* privateKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_private(p, buf, pk));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_OCTET_STRING));
|
||||
|
||||
grp_id = mbedtls_pk_get_group_id(pk);
|
||||
/* privateKeyAlgorithm */
|
||||
if ((ret = mbedtls_oid_get_oid_by_ec_grp_algid(grp_id, &oid, &oid_len)) != 0) {
|
||||
return ret;
|
||||
}
|
||||
MBEDTLS_ASN1_CHK_ADD(len,
|
||||
mbedtls_asn1_write_algorithm_identifier_ext(p, buf, oid, oid_len, 0, 0));
|
||||
|
||||
/* version */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 0));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_HAVE_RFC8410_CURVES */
|
||||
|
||||
/*
|
||||
* RFC 5915, or SEC1 Appendix C.4
|
||||
*
|
||||
* ECPrivateKey ::= SEQUENCE {
|
||||
* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
|
||||
* privateKey OCTET STRING,
|
||||
* parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
|
||||
* publicKey [1] BIT STRING OPTIONAL
|
||||
* }
|
||||
*/
|
||||
static int pk_write_ec_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
size_t len = 0;
|
||||
int ret;
|
||||
size_t pub_len = 0, par_len = 0;
|
||||
mbedtls_ecp_group_id grp_id;
|
||||
|
||||
/* publicKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, pk_write_ec_pubkey(p, buf, pk));
|
||||
|
||||
if (*p - buf < 1) {
|
||||
return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL;
|
||||
}
|
||||
(*p)--;
|
||||
**p = 0;
|
||||
pub_len += 1;
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_len(p, buf, pub_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_BIT_STRING));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_len(p, buf, pub_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_tag(p, buf,
|
||||
MBEDTLS_ASN1_CONTEXT_SPECIFIC |
|
||||
MBEDTLS_ASN1_CONSTRUCTED | 1));
|
||||
len += pub_len;
|
||||
|
||||
/* parameters */
|
||||
grp_id = mbedtls_pk_get_group_id(pk);
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, pk_write_ec_param(p, buf, grp_id));
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, mbedtls_asn1_write_len(p, buf, par_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, mbedtls_asn1_write_tag(p, buf,
|
||||
MBEDTLS_ASN1_CONTEXT_SPECIFIC |
|
||||
MBEDTLS_ASN1_CONSTRUCTED | 0));
|
||||
len += par_len;
|
||||
|
||||
/* privateKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_private(p, buf, pk));
|
||||
|
||||
/* version */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 1));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
|
||||
|
||||
/******************************************************************************
|
||||
* Internal functions for Opaque keys.
|
||||
******************************************************************************/
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
||||
/* It is assumed that the input key is opaque */
|
||||
static psa_key_type_t pk_get_opaque_key_type(const mbedtls_pk_context *pk)
|
||||
{
|
||||
psa_key_attributes_t opaque_attrs = PSA_KEY_ATTRIBUTES_INIT;
|
||||
psa_key_type_t opaque_key_type;
|
||||
|
||||
if (psa_get_key_attributes(pk->priv_id, &opaque_attrs) != PSA_SUCCESS) {
|
||||
return 0;
|
||||
}
|
||||
opaque_key_type = psa_get_key_type(&opaque_attrs);
|
||||
psa_reset_key_attributes(&opaque_attrs);
|
||||
|
||||
return opaque_key_type;
|
||||
}
|
||||
|
||||
static int pk_write_opaque_pubkey(unsigned char **p, unsigned char *start,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
@ -329,8 +524,28 @@ static int pk_write_opaque_pubkey(unsigned char **p, unsigned char *start,
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
|
||||
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS) && defined(MBEDTLS_PEM_WRITE_C)
|
||||
/* It is assumed that the input key is opaque */
|
||||
static psa_ecc_family_t pk_get_opaque_ec_family(const mbedtls_pk_context *pk)
|
||||
{
|
||||
psa_ecc_family_t ec_family = 0;
|
||||
psa_key_attributes_t key_attrs = PSA_KEY_ATTRIBUTES_INIT;
|
||||
|
||||
if (psa_get_key_attributes(pk->priv_id, &key_attrs) != PSA_SUCCESS) {
|
||||
return 0;
|
||||
}
|
||||
ec_family = PSA_KEY_TYPE_ECC_GET_FAMILY(psa_get_key_type(&key_attrs));
|
||||
psa_reset_key_attributes(&key_attrs);
|
||||
|
||||
return ec_family;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS && MBEDTLS_PEM_WRITE_C */
|
||||
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
||||
|
||||
/******************************************************************************
|
||||
* Public functions for writing private/public DER keys.
|
||||
******************************************************************************/
|
||||
int mbedtls_pk_write_pubkey(unsigned char **p, unsigned char *start,
|
||||
const mbedtls_pk_context *key)
|
||||
{
|
||||
@ -453,226 +668,6 @@ int mbedtls_pk_write_pubkey_der(const mbedtls_pk_context *key, unsigned char *bu
|
||||
return (int) len;
|
||||
}
|
||||
|
||||
#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
|
||||
#if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
|
||||
/*
|
||||
* RFC8410 section 7
|
||||
*
|
||||
* OneAsymmetricKey ::= SEQUENCE {
|
||||
* version Version,
|
||||
* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
|
||||
* privateKey PrivateKey,
|
||||
* attributes [0] IMPLICIT Attributes OPTIONAL,
|
||||
* ...,
|
||||
* [[2: publicKey [1] IMPLICIT PublicKey OPTIONAL ]],
|
||||
* ...
|
||||
* }
|
||||
* ...
|
||||
* CurvePrivateKey ::= OCTET STRING
|
||||
*/
|
||||
static int pk_write_ec_rfc8410_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
||||
size_t len = 0;
|
||||
size_t oid_len = 0;
|
||||
const char *oid;
|
||||
mbedtls_ecp_group_id grp_id;
|
||||
|
||||
/* privateKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_private(p, buf, pk));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_OCTET_STRING));
|
||||
|
||||
grp_id = mbedtls_pk_get_group_id(pk);
|
||||
/* privateKeyAlgorithm */
|
||||
if ((ret = mbedtls_oid_get_oid_by_ec_grp_algid(grp_id, &oid, &oid_len)) != 0) {
|
||||
return ret;
|
||||
}
|
||||
MBEDTLS_ASN1_CHK_ADD(len,
|
||||
mbedtls_asn1_write_algorithm_identifier_ext(p, buf, oid, oid_len, 0, 0));
|
||||
|
||||
/* version */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 0));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_HAVE_RFC8410_CURVES */
|
||||
|
||||
/*
|
||||
* RFC 5915, or SEC1 Appendix C.4
|
||||
*
|
||||
* ECPrivateKey ::= SEQUENCE {
|
||||
* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
|
||||
* privateKey OCTET STRING,
|
||||
* parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
|
||||
* publicKey [1] BIT STRING OPTIONAL
|
||||
* }
|
||||
*/
|
||||
static int pk_write_ec_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
size_t len = 0;
|
||||
int ret;
|
||||
size_t pub_len = 0, par_len = 0;
|
||||
mbedtls_ecp_group_id grp_id;
|
||||
|
||||
/* publicKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, pk_write_ec_pubkey(p, buf, pk));
|
||||
|
||||
if (*p - buf < 1) {
|
||||
return MBEDTLS_ERR_ASN1_BUF_TOO_SMALL;
|
||||
}
|
||||
(*p)--;
|
||||
**p = 0;
|
||||
pub_len += 1;
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_len(p, buf, pub_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_BIT_STRING));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_len(p, buf, pub_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(pub_len, mbedtls_asn1_write_tag(p, buf,
|
||||
MBEDTLS_ASN1_CONTEXT_SPECIFIC |
|
||||
MBEDTLS_ASN1_CONSTRUCTED | 1));
|
||||
len += pub_len;
|
||||
|
||||
/* parameters */
|
||||
grp_id = mbedtls_pk_get_group_id(pk);
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, pk_write_ec_param(p, buf, grp_id));
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, mbedtls_asn1_write_len(p, buf, par_len));
|
||||
MBEDTLS_ASN1_CHK_ADD(par_len, mbedtls_asn1_write_tag(p, buf,
|
||||
MBEDTLS_ASN1_CONTEXT_SPECIFIC |
|
||||
MBEDTLS_ASN1_CONSTRUCTED | 0));
|
||||
len += par_len;
|
||||
|
||||
/* privateKey */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_private(p, buf, pk));
|
||||
|
||||
/* version */
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 1));
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p, buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
|
||||
|
||||
#if defined(MBEDTLS_RSA_C)
|
||||
static int pk_write_rsa_der(unsigned char **p, unsigned char *buf,
|
||||
const mbedtls_pk_context *pk)
|
||||
{
|
||||
size_t len = 0;
|
||||
int ret;
|
||||
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
||||
if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_OPAQUE) {
|
||||
uint8_t tmp[PSA_EXPORT_KEY_PAIR_MAX_SIZE];
|
||||
size_t tmp_len = 0;
|
||||
|
||||
if (psa_export_key(pk->priv_id, tmp, sizeof(tmp), &tmp_len) != PSA_SUCCESS) {
|
||||
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
||||
}
|
||||
*p -= tmp_len;
|
||||
memcpy(*p, tmp, tmp_len);
|
||||
len += tmp_len;
|
||||
mbedtls_platform_zeroize(tmp, sizeof(tmp));
|
||||
} else
|
||||
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
||||
{
|
||||
mbedtls_mpi T; /* Temporary holding the exported parameters */
|
||||
mbedtls_rsa_context *rsa = mbedtls_pk_rsa(*pk);
|
||||
|
||||
/*
|
||||
* Export the parameters one after another to avoid simultaneous copies.
|
||||
*/
|
||||
|
||||
mbedtls_mpi_init(&T);
|
||||
|
||||
/* Export QP */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, NULL, NULL, &T)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export DQ */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, NULL, &T, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export DP */
|
||||
if ((ret = mbedtls_rsa_export_crt(rsa, &T, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export Q */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
&T, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export P */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, &T,
|
||||
NULL, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export D */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
NULL, &T, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export E */
|
||||
if ((ret = mbedtls_rsa_export(rsa, NULL, NULL,
|
||||
NULL, NULL, &T)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
/* Export N */
|
||||
if ((ret = mbedtls_rsa_export(rsa, &T, NULL,
|
||||
NULL, NULL, NULL)) != 0 ||
|
||||
(ret = mbedtls_asn1_write_mpi(p, buf, &T)) < 0) {
|
||||
goto end_of_export;
|
||||
}
|
||||
len += ret;
|
||||
|
||||
end_of_export:
|
||||
|
||||
mbedtls_mpi_free(&T);
|
||||
if (ret < 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_int(p, buf, 0));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_len(p, buf, len));
|
||||
MBEDTLS_ASN1_CHK_ADD(len, mbedtls_asn1_write_tag(p,
|
||||
buf, MBEDTLS_ASN1_CONSTRUCTED |
|
||||
MBEDTLS_ASN1_SEQUENCE));
|
||||
}
|
||||
|
||||
return (int) len;
|
||||
}
|
||||
#endif /* MBEDTLS_RSA_C */
|
||||
|
||||
int mbedtls_pk_write_key_der(const mbedtls_pk_context *key, unsigned char *buf, size_t size)
|
||||
{
|
||||
unsigned char *c;
|
||||
@ -722,6 +717,9 @@ int mbedtls_pk_write_key_der(const mbedtls_pk_context *key, unsigned char *buf,
|
||||
return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
* Public functions for wrinting private/public PEM keys.
|
||||
******************************************************************************/
|
||||
#if defined(MBEDTLS_PEM_WRITE_C)
|
||||
|
||||
#define PUB_DER_MAX_BYTES \
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user