/* | |
* Public Key layer for writing key files and structures | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* SPDX-License-Identifier: Apache-2.0 | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); you may | |
* not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_PK_WRITE_C) | |
#include "mbedtls/pk.h" | |
#include "mbedtls/asn1write.h" | |
#include "mbedtls/oid.h" | |
#include "mbedtls/platform_util.h" | |
#include <string.h> | |
#if defined(MBEDTLS_RSA_C) | |
#include "mbedtls/rsa.h" | |
#endif | |
#if defined(MBEDTLS_ECP_C) | |
#include "mbedtls/ecp.h" | |
#endif | |
#if defined(MBEDTLS_ECDSA_C) | |
#include "mbedtls/ecdsa.h" | |
#endif | |
#if defined(MBEDTLS_PEM_WRITE_C) | |
#include "mbedtls/pem.h" | |
#endif | |
#if defined(MBEDTLS_USE_PSA_CRYPTO) | |
#include "psa/crypto.h" | |
#include "mbedtls/psa_util.h" | |
#endif | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdlib.h> | |
#define mbedtls_calloc calloc | |
#define mbedtls_free free | |
#endif | |
/* Parameter validation macros based on platform_util.h */ | |
#define PK_VALIDATE_RET( cond ) \ | |
MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_PK_BAD_INPUT_DATA ) | |
#define PK_VALIDATE( cond ) \ | |
MBEDTLS_INTERNAL_VALIDATE( cond ) | |
#if defined(MBEDTLS_RSA_C) | |
/* | |
* RSAPublicKey ::= SEQUENCE { | |
* modulus INTEGER, -- n | |
* publicExponent INTEGER -- e | |
* } | |
*/ | |
static int pk_write_rsa_pubkey( unsigned char **p, unsigned char *start, | |
mbedtls_rsa_context *rsa ) | |
{ | |
int ret; | |
size_t len = 0; | |
mbedtls_mpi T; | |
mbedtls_mpi_init( &T ); | |
/* Export E */ | |
if ( ( ret = mbedtls_rsa_export( rsa, NULL, NULL, NULL, NULL, &T ) ) != 0 || | |
( ret = mbedtls_asn1_write_mpi( p, start, &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, start, &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_len( p, start, len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | | |
MBEDTLS_ASN1_SEQUENCE ) ); | |
return( (int) len ); | |
} | |
#endif /* MBEDTLS_RSA_C */ | |
#if defined(MBEDTLS_ECP_C) | |
/* | |
* EC public key is an EC point | |
*/ | |
static int pk_write_ec_pubkey( unsigned char **p, unsigned char *start, | |
mbedtls_ecp_keypair *ec ) | |
{ | |
int ret; | |
size_t len = 0; | |
unsigned char buf[MBEDTLS_ECP_MAX_PT_LEN]; | |
if( ( ret = mbedtls_ecp_point_write_binary( &ec->grp, &ec->Q, | |
MBEDTLS_ECP_PF_UNCOMPRESSED, | |
&len, buf, sizeof( buf ) ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
if( *p < start || (size_t)( *p - start ) < len ) | |
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); | |
*p -= len; | |
memcpy( *p, buf, len ); | |
return( (int) len ); | |
} | |
/* | |
* ECParameters ::= CHOICE { | |
* namedCurve OBJECT IDENTIFIER | |
* } | |
*/ | |
static int pk_write_ec_param( unsigned char **p, unsigned char *start, | |
mbedtls_ecp_keypair *ec ) | |
{ | |
int ret; | |
size_t len = 0; | |
const char *oid; | |
size_t oid_len; | |
if( ( ret = mbedtls_oid_get_oid_by_ec_grp( ec->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 ); | |
} | |
#endif /* MBEDTLS_ECP_C */ | |
int mbedtls_pk_write_pubkey( unsigned char **p, unsigned char *start, | |
const mbedtls_pk_context *key ) | |
{ | |
int ret; | |
size_t len = 0; | |
PK_VALIDATE_RET( p != NULL ); | |
PK_VALIDATE_RET( *p != NULL ); | |
PK_VALIDATE_RET( start != NULL ); | |
PK_VALIDATE_RET( key != NULL ); | |
#if defined(MBEDTLS_RSA_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) | |
MBEDTLS_ASN1_CHK_ADD( len, pk_write_rsa_pubkey( p, start, mbedtls_pk_rsa( *key ) ) ); | |
else | |
#endif | |
#if defined(MBEDTLS_ECP_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) | |
MBEDTLS_ASN1_CHK_ADD( len, pk_write_ec_pubkey( p, start, mbedtls_pk_ec( *key ) ) ); | |
else | |
#endif | |
#if defined(MBEDTLS_USE_PSA_CRYPTO) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_OPAQUE ) | |
{ | |
size_t buffer_size; | |
psa_key_handle_t* key_slot = (psa_key_handle_t*) key->pk_ctx; | |
if ( *p < start ) | |
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); | |
buffer_size = (size_t)( *p - start ); | |
if ( psa_export_public_key( *key_slot, start, buffer_size, &len ) | |
!= PSA_SUCCESS ) | |
{ | |
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); | |
} | |
else | |
{ | |
*p -= len; | |
memmove( *p, start, len ); | |
} | |
} | |
else | |
#endif /* MBEDTLS_USE_PSA_CRYPTO */ | |
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); | |
return( (int) len ); | |
} | |
int mbedtls_pk_write_pubkey_der( mbedtls_pk_context *key, unsigned char *buf, size_t size ) | |
{ | |
int ret; | |
unsigned char *c; | |
size_t len = 0, par_len = 0, oid_len; | |
mbedtls_pk_type_t pk_type; | |
const char *oid; | |
PK_VALIDATE_RET( key != NULL ); | |
if( size == 0 ) | |
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); | |
PK_VALIDATE_RET( buf != NULL ); | |
c = buf + size; | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_pk_write_pubkey( &c, buf, key ) ); | |
if( c - buf < 1 ) | |
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); | |
/* | |
* SubjectPublicKeyInfo ::= SEQUENCE { | |
* algorithm AlgorithmIdentifier, | |
* subjectPublicKey BIT STRING } | |
*/ | |
*--c = 0; | |
len += 1; | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_BIT_STRING ) ); | |
pk_type = mbedtls_pk_get_type( key ); | |
#if defined(MBEDTLS_ECP_C) | |
if( pk_type == MBEDTLS_PK_ECKEY ) | |
{ | |
MBEDTLS_ASN1_CHK_ADD( par_len, pk_write_ec_param( &c, buf, mbedtls_pk_ec( *key ) ) ); | |
} | |
#endif | |
#if defined(MBEDTLS_USE_PSA_CRYPTO) | |
if( pk_type == MBEDTLS_PK_OPAQUE ) | |
{ | |
psa_status_t status; | |
psa_key_type_t key_type; | |
psa_key_handle_t handle; | |
psa_ecc_curve_t curve; | |
handle = *((psa_key_handle_t*) key->pk_ctx ); | |
status = psa_get_key_information( handle, &key_type, | |
NULL /* bitsize not needed */ ); | |
if( status != PSA_SUCCESS ) | |
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED ); | |
curve = PSA_KEY_TYPE_GET_CURVE( key_type ); | |
if( curve == 0 ) | |
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); | |
ret = mbedtls_psa_get_ecc_oid_from_id( curve, &oid, &oid_len ); | |
if( ret != 0 ) | |
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); | |
/* Write EC algorithm parameters; that's akin | |
* to pk_write_ec_param() above. */ | |
MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_oid( &c, buf, | |
oid, oid_len ) ); | |
/* The rest of the function works as for legacy EC contexts. */ | |
pk_type = MBEDTLS_PK_ECKEY; | |
} | |
#endif /* MBEDTLS_USE_PSA_CRYPTO */ | |
if( ( ret = mbedtls_oid_get_oid_by_pk_alg( pk_type, &oid, | |
&oid_len ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( &c, buf, oid, oid_len, | |
par_len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED | | |
MBEDTLS_ASN1_SEQUENCE ) ); | |
return( (int) len ); | |
} | |
int mbedtls_pk_write_key_der( mbedtls_pk_context *key, unsigned char *buf, size_t size ) | |
{ | |
int ret; | |
unsigned char *c; | |
size_t len = 0; | |
PK_VALIDATE_RET( key != NULL ); | |
if( size == 0 ) | |
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); | |
PK_VALIDATE_RET( buf != NULL ); | |
c = buf + size; | |
#if defined(MBEDTLS_RSA_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) | |
{ | |
mbedtls_mpi T; /* Temporary holding the exported parameters */ | |
mbedtls_rsa_context *rsa = mbedtls_pk_rsa( *key ); | |
/* | |
* 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( &c, 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( &c, 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( &c, 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( &c, 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( &c, 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( &c, 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( &c, 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( &c, 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( &c, buf, 0 ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, | |
buf, MBEDTLS_ASN1_CONSTRUCTED | | |
MBEDTLS_ASN1_SEQUENCE ) ); | |
} | |
else | |
#endif /* MBEDTLS_RSA_C */ | |
#if defined(MBEDTLS_ECP_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) | |
{ | |
mbedtls_ecp_keypair *ec = mbedtls_pk_ec( *key ); | |
size_t pub_len = 0, par_len = 0; | |
/* | |
* 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 | |
* } | |
*/ | |
/* publicKey */ | |
MBEDTLS_ASN1_CHK_ADD( pub_len, pk_write_ec_pubkey( &c, buf, ec ) ); | |
if( c - buf < 1 ) | |
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); | |
*--c = 0; | |
pub_len += 1; | |
MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_len( &c, buf, pub_len ) ); | |
MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_BIT_STRING ) ); | |
MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_len( &c, buf, pub_len ) ); | |
MBEDTLS_ASN1_CHK_ADD( pub_len, mbedtls_asn1_write_tag( &c, buf, | |
MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ); | |
len += pub_len; | |
/* parameters */ | |
MBEDTLS_ASN1_CHK_ADD( par_len, pk_write_ec_param( &c, buf, ec ) ); | |
MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_len( &c, buf, par_len ) ); | |
MBEDTLS_ASN1_CHK_ADD( par_len, mbedtls_asn1_write_tag( &c, buf, | |
MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ); | |
len += par_len; | |
/* privateKey: write as MPI then fix tag */ | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_mpi( &c, buf, &ec->d ) ); | |
*c = MBEDTLS_ASN1_OCTET_STRING; | |
/* version */ | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_int( &c, buf, 1 ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( &c, buf, len ) ); | |
MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( &c, buf, MBEDTLS_ASN1_CONSTRUCTED | | |
MBEDTLS_ASN1_SEQUENCE ) ); | |
} | |
else | |
#endif /* MBEDTLS_ECP_C */ | |
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); | |
return( (int) len ); | |
} | |
#if defined(MBEDTLS_PEM_WRITE_C) | |
#define PEM_BEGIN_PUBLIC_KEY "-----BEGIN PUBLIC KEY-----\n" | |
#define PEM_END_PUBLIC_KEY "-----END PUBLIC KEY-----\n" | |
#define PEM_BEGIN_PRIVATE_KEY_RSA "-----BEGIN RSA PRIVATE KEY-----\n" | |
#define PEM_END_PRIVATE_KEY_RSA "-----END RSA PRIVATE KEY-----\n" | |
#define PEM_BEGIN_PRIVATE_KEY_EC "-----BEGIN EC PRIVATE KEY-----\n" | |
#define PEM_END_PRIVATE_KEY_EC "-----END EC PRIVATE KEY-----\n" | |
/* | |
* Max sizes of key per types. Shown as tag + len (+ content). | |
*/ | |
#if defined(MBEDTLS_RSA_C) | |
/* | |
* RSA public keys: | |
* SubjectPublicKeyInfo ::= SEQUENCE { 1 + 3 | |
* algorithm AlgorithmIdentifier, 1 + 1 (sequence) | |
* + 1 + 1 + 9 (rsa oid) | |
* + 1 + 1 (params null) | |
* subjectPublicKey BIT STRING } 1 + 3 + (1 + below) | |
* RSAPublicKey ::= SEQUENCE { 1 + 3 | |
* modulus INTEGER, -- n 1 + 3 + MPI_MAX + 1 | |
* publicExponent INTEGER -- e 1 + 3 + MPI_MAX + 1 | |
* } | |
*/ | |
#define RSA_PUB_DER_MAX_BYTES 38 + 2 * MBEDTLS_MPI_MAX_SIZE | |
/* | |
* RSA private keys: | |
* RSAPrivateKey ::= SEQUENCE { 1 + 3 | |
* version Version, 1 + 1 + 1 | |
* modulus INTEGER, 1 + 3 + MPI_MAX + 1 | |
* publicExponent INTEGER, 1 + 3 + MPI_MAX + 1 | |
* privateExponent INTEGER, 1 + 3 + MPI_MAX + 1 | |
* prime1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 | |
* prime2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 | |
* exponent1 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 | |
* exponent2 INTEGER, 1 + 3 + MPI_MAX / 2 + 1 | |
* coefficient INTEGER, 1 + 3 + MPI_MAX / 2 + 1 | |
* otherPrimeInfos OtherPrimeInfos OPTIONAL 0 (not supported) | |
* } | |
*/ | |
#define MPI_MAX_SIZE_2 MBEDTLS_MPI_MAX_SIZE / 2 + \ | |
MBEDTLS_MPI_MAX_SIZE % 2 | |
#define RSA_PRV_DER_MAX_BYTES 47 + 3 * MBEDTLS_MPI_MAX_SIZE \ | |
+ 5 * MPI_MAX_SIZE_2 | |
#else /* MBEDTLS_RSA_C */ | |
#define RSA_PUB_DER_MAX_BYTES 0 | |
#define RSA_PRV_DER_MAX_BYTES 0 | |
#endif /* MBEDTLS_RSA_C */ | |
#if defined(MBEDTLS_ECP_C) | |
/* | |
* EC public keys: | |
* SubjectPublicKeyInfo ::= SEQUENCE { 1 + 2 | |
* algorithm AlgorithmIdentifier, 1 + 1 (sequence) | |
* + 1 + 1 + 7 (ec oid) | |
* + 1 + 1 + 9 (namedCurve oid) | |
* subjectPublicKey BIT STRING 1 + 2 + 1 [1] | |
* + 1 (point format) [1] | |
* + 2 * ECP_MAX (coords) [1] | |
* } | |
*/ | |
#define ECP_PUB_DER_MAX_BYTES 30 + 2 * MBEDTLS_ECP_MAX_BYTES | |
/* | |
* EC private keys: | |
* ECPrivateKey ::= SEQUENCE { 1 + 2 | |
* version INTEGER , 1 + 1 + 1 | |
* privateKey OCTET STRING, 1 + 1 + ECP_MAX | |
* parameters [0] ECParameters OPTIONAL, 1 + 1 + (1 + 1 + 9) | |
* publicKey [1] BIT STRING OPTIONAL 1 + 2 + [1] above | |
* } | |
*/ | |
#define ECP_PRV_DER_MAX_BYTES 29 + 3 * MBEDTLS_ECP_MAX_BYTES | |
#else /* MBEDTLS_ECP_C */ | |
#define ECP_PUB_DER_MAX_BYTES 0 | |
#define ECP_PRV_DER_MAX_BYTES 0 | |
#endif /* MBEDTLS_ECP_C */ | |
#define PUB_DER_MAX_BYTES RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \ | |
RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES | |
#define PRV_DER_MAX_BYTES RSA_PRV_DER_MAX_BYTES > ECP_PRV_DER_MAX_BYTES ? \ | |
RSA_PRV_DER_MAX_BYTES : ECP_PRV_DER_MAX_BYTES | |
int mbedtls_pk_write_pubkey_pem( mbedtls_pk_context *key, unsigned char *buf, size_t size ) | |
{ | |
int ret; | |
unsigned char output_buf[PUB_DER_MAX_BYTES]; | |
size_t olen = 0; | |
PK_VALIDATE_RET( key != NULL ); | |
PK_VALIDATE_RET( buf != NULL || size == 0 ); | |
if( ( ret = mbedtls_pk_write_pubkey_der( key, output_buf, | |
sizeof(output_buf) ) ) < 0 ) | |
{ | |
return( ret ); | |
} | |
if( ( ret = mbedtls_pem_write_buffer( PEM_BEGIN_PUBLIC_KEY, PEM_END_PUBLIC_KEY, | |
output_buf + sizeof(output_buf) - ret, | |
ret, buf, size, &olen ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
return( 0 ); | |
} | |
int mbedtls_pk_write_key_pem( mbedtls_pk_context *key, unsigned char *buf, size_t size ) | |
{ | |
int ret; | |
unsigned char output_buf[PRV_DER_MAX_BYTES]; | |
const char *begin, *end; | |
size_t olen = 0; | |
PK_VALIDATE_RET( key != NULL ); | |
PK_VALIDATE_RET( buf != NULL || size == 0 ); | |
if( ( ret = mbedtls_pk_write_key_der( key, output_buf, sizeof(output_buf) ) ) < 0 ) | |
return( ret ); | |
#if defined(MBEDTLS_RSA_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_RSA ) | |
{ | |
begin = PEM_BEGIN_PRIVATE_KEY_RSA; | |
end = PEM_END_PRIVATE_KEY_RSA; | |
} | |
else | |
#endif | |
#if defined(MBEDTLS_ECP_C) | |
if( mbedtls_pk_get_type( key ) == MBEDTLS_PK_ECKEY ) | |
{ | |
begin = PEM_BEGIN_PRIVATE_KEY_EC; | |
end = PEM_END_PRIVATE_KEY_EC; | |
} | |
else | |
#endif | |
return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); | |
if( ( ret = mbedtls_pem_write_buffer( begin, end, | |
output_buf + sizeof(output_buf) - ret, | |
ret, buf, size, &olen ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
return( 0 ); | |
} | |
#endif /* MBEDTLS_PEM_WRITE_C */ | |
#endif /* MBEDTLS_PK_WRITE_C */ |