diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/pkwrite.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/pkwrite.c | 623 |
1 files changed, 0 insertions, 623 deletions
diff --git a/lib/mbedtls-2.27.0/library/pkwrite.c b/lib/mbedtls-2.27.0/library/pkwrite.c deleted file mode 100644 index 566153d..0000000 --- a/lib/mbedtls-2.27.0/library/pkwrite.c +++ /dev/null @@ -1,623 +0,0 @@ -/* - * Public Key layer for writing key files and structures - * - * Copyright The Mbed TLS Contributors - * 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. - */ - -#include "common.h" - -#if defined(MBEDTLS_PK_WRITE_C) - -#include "mbedtls/pk.h" -#include "mbedtls/asn1write.h" -#include "mbedtls/oid.h" -#include "mbedtls/platform_util.h" -#include "mbedtls/error.h" - -#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" -#include "mbedtls/platform_util.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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 = 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( 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 ); -} - -/* - * privateKey OCTET STRING -- always of length ceil(log2(n)/8) - */ -static int pk_write_ec_private( unsigned char **p, unsigned char *start, - mbedtls_ecp_keypair *ec ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t byte_length = ( ec->grp.pbits + 7 ) / 8; - unsigned char tmp[MBEDTLS_ECP_MAX_BYTES]; - - ret = mbedtls_ecp_write_key( ec, tmp, byte_length ); - if( ret != 0 ) - goto exit; - ret = mbedtls_asn1_write_octet_string( p, start, tmp, byte_length ); - -exit: - mbedtls_platform_zeroize( tmp, byte_length ); - return( ret ); -} -#endif /* MBEDTLS_ECP_C */ - -int mbedtls_pk_write_pubkey( unsigned char **p, unsigned char *start, - const mbedtls_pk_context *key ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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_id_t* key_id = (psa_key_id_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_id, 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; - psa_key_type_t key_type; - psa_key_id_t key_id; - psa_ecc_family_t curve; - size_t bits; - - key_id = *((psa_key_id_t*) key->pk_ctx ); - if( PSA_SUCCESS != psa_get_key_attributes( key_id, &attributes ) ) - return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED ); - key_type = psa_get_key_type( &attributes ); - bits = psa_get_key_bits( &attributes ); - psa_reset_key_attributes( &attributes ); - - curve = PSA_KEY_TYPE_ECC_GET_FAMILY( key_type ); - if( curve == 0 ) - return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); - - ret = mbedtls_psa_get_ecc_oid_from_id( curve, bits, &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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 */ - MBEDTLS_ASN1_CHK_ADD( len, pk_write_ec_private( &c, buf, ec ) ); - - /* 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 */ |