332 lines
15 KiB
C
332 lines
15 KiB
C
/**
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* \file x509.h
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*
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* \brief X.509 generic defines and structures
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_X509_H
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#define MBEDTLS_X509_H
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include "asn1.h"
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#include "pk.h"
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#if defined(MBEDTLS_RSA_C)
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#include "rsa.h"
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#endif
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/**
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* \addtogroup x509_module
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* \{
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*/
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#if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
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/**
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* Maximum number of intermediate CAs in a verification chain.
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* That is, maximum length of the chain, excluding the end-entity certificate
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* and the trusted root certificate.
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*
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* Set this to a low value to prevent an adversary from making you waste
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* resources verifying an overlong certificate chain.
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*/
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#define MBEDTLS_X509_MAX_INTERMEDIATE_CA 8
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#endif
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/**
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* \name X509 Error codes
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* \{
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*/
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#define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080 /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
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#define MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100 /**< Requested OID is unknown. */
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#define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
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#define MBEDTLS_ERR_X509_INVALID_VERSION -0x2200 /**< The CRT/CRL/CSR version element is invalid. */
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#define MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280 /**< The serial tag or value is invalid. */
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#define MBEDTLS_ERR_X509_INVALID_ALG -0x2300 /**< The algorithm tag or value is invalid. */
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#define MBEDTLS_ERR_X509_INVALID_NAME -0x2380 /**< The name tag or value is invalid. */
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#define MBEDTLS_ERR_X509_INVALID_DATE -0x2400 /**< The date tag or value is invalid. */
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#define MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480 /**< The signature tag or value invalid. */
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#define MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500 /**< The extension tag or value is invalid. */
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#define MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580 /**< CRT/CRL/CSR has an unsupported version number. */
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#define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600 /**< Signature algorithm (oid) is unsupported. */
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#define MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680 /**< Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
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#define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700 /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
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#define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 /**< Format not recognized as DER or PEM. */
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#define MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800 /**< Input invalid. */
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#define MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880 /**< Allocation of memory failed. */
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#define MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900 /**< Read/write of file failed. */
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#define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980 /**< Destination buffer is too small. */
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/* \} name */
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/**
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* \name X509 Verify codes
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* \{
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*/
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/* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
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#define MBEDTLS_X509_BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */
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#define MBEDTLS_X509_BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */
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#define MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */
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#define MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */
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#define MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 /**< The CRL is not correctly signed by the trusted CA. */
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#define MBEDTLS_X509_BADCRL_EXPIRED 0x20 /**< The CRL is expired. */
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#define MBEDTLS_X509_BADCERT_MISSING 0x40 /**< Certificate was missing. */
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#define MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */
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#define MBEDTLS_X509_BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */
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#define MBEDTLS_X509_BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */
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#define MBEDTLS_X509_BADCRL_FUTURE 0x0400 /**< The CRL is from the future */
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#define MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 /**< Usage does not match the keyUsage extension. */
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#define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 /**< Usage does not match the extendedKeyUsage extension. */
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#define MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 /**< Usage does not match the nsCertType extension. */
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#define MBEDTLS_X509_BADCERT_BAD_MD 0x4000 /**< The certificate is signed with an unacceptable hash. */
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#define MBEDTLS_X509_BADCERT_BAD_PK 0x8000 /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
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#define MBEDTLS_X509_BADCERT_BAD_KEY 0x010000 /**< The certificate is signed with an unacceptable key (eg bad curve, RSA too short). */
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#define MBEDTLS_X509_BADCRL_BAD_MD 0x020000 /**< The CRL is signed with an unacceptable hash. */
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#define MBEDTLS_X509_BADCRL_BAD_PK 0x040000 /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
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#define MBEDTLS_X509_BADCRL_BAD_KEY 0x080000 /**< The CRL is signed with an unacceptable key (eg bad curve, RSA too short). */
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/* \} name */
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/* \} addtogroup x509_module */
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/*
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* X.509 v3 Key Usage Extension flags
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* Reminder: update x509_info_key_usage() when adding new flags.
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*/
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#define MBEDTLS_X509_KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */
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#define MBEDTLS_X509_KU_NON_REPUDIATION (0x40) /* bit 1 */
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#define MBEDTLS_X509_KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */
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#define MBEDTLS_X509_KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */
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#define MBEDTLS_X509_KU_KEY_AGREEMENT (0x08) /* bit 4 */
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#define MBEDTLS_X509_KU_KEY_CERT_SIGN (0x04) /* bit 5 */
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#define MBEDTLS_X509_KU_CRL_SIGN (0x02) /* bit 6 */
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#define MBEDTLS_X509_KU_ENCIPHER_ONLY (0x01) /* bit 7 */
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#define MBEDTLS_X509_KU_DECIPHER_ONLY (0x8000) /* bit 8 */
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/*
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* Netscape certificate types
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* (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
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*/
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#define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */
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#define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */
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#define MBEDTLS_X509_NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */
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#define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */
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#define MBEDTLS_X509_NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */
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#define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */
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#define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */
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#define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA (0x01) /* bit 7 */
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/*
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* X.509 extension types
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*
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* Comments refer to the status for using certificates. Status can be
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* different for writing certificates or reading CRLs or CSRs.
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*/
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#define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER (1 << 0)
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#define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER (1 << 1)
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#define MBEDTLS_X509_EXT_KEY_USAGE (1 << 2)
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#define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES (1 << 3)
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#define MBEDTLS_X509_EXT_POLICY_MAPPINGS (1 << 4)
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#define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME (1 << 5) /* Supported (DNS) */
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#define MBEDTLS_X509_EXT_ISSUER_ALT_NAME (1 << 6)
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#define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS (1 << 7)
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#define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS (1 << 8) /* Supported */
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#define MBEDTLS_X509_EXT_NAME_CONSTRAINTS (1 << 9)
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#define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS (1 << 10)
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#define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE (1 << 11)
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#define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS (1 << 12)
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#define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY (1 << 13)
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#define MBEDTLS_X509_EXT_FRESHEST_CRL (1 << 14)
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#define MBEDTLS_X509_EXT_NS_CERT_TYPE (1 << 16) /* Parsed (and then ?) */
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/*
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* Storage format identifiers
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* Recognized formats: PEM and DER
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*/
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#define MBEDTLS_X509_FORMAT_DER 1
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#define MBEDTLS_X509_FORMAT_PEM 2
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#define MBEDTLS_X509_MAX_DN_NAME_SIZE 256 /**< Maximum value size of a DN entry */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup x509_module
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* \{ */
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/**
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* \name Structures for parsing X.509 certificates, CRLs and CSRs
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* \{
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*/
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/**
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* Type-length-value structure that allows for ASN1 using DER.
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*/
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typedef mbedtls_asn1_buf mbedtls_x509_buf;
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/**
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* Container for ASN1 bit strings.
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*/
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typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring;
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/**
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* Container for ASN1 named information objects.
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* It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
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*/
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typedef mbedtls_asn1_named_data mbedtls_x509_name;
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/**
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* Container for a sequence of ASN.1 items
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*/
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typedef mbedtls_asn1_sequence mbedtls_x509_sequence;
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/** Container for date and time (precision in seconds). */
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typedef struct mbedtls_x509_time
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{
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int year, mon, day; /**< Date. */
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int hour, min, sec; /**< Time. */
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}
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mbedtls_x509_time;
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/** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
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/** \} addtogroup x509_module */
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/**
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* \brief Store the certificate DN in printable form into buf;
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* no more than size characters will be written.
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*
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* \param buf Buffer to write to
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* \param size Maximum size of buffer
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* \param dn The X509 name to represent
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*
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* \return The length of the string written (not including the
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* terminated nul byte), or a negative error code.
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*/
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int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn );
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/**
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* \brief Store the certificate serial in printable form into buf;
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* no more than size characters will be written.
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*
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* \param buf Buffer to write to
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* \param size Maximum size of buffer
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* \param serial The X509 serial to represent
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*
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* \return The length of the string written (not including the
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* terminated nul byte), or a negative error code.
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*/
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int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial );
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/**
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* \brief Check a given mbedtls_x509_time against the system time
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* and tell if it's in the past.
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*
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* \note Intended usage is "if( is_past( valid_to ) ) ERROR".
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* Hence the return value of 1 if on internal errors.
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*
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* \param time mbedtls_x509_time to check
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*
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* \return 1 if the given time is in the past or an error occured,
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* 0 otherwise.
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*/
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int mbedtls_x509_time_is_past( const mbedtls_x509_time *time );
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/**
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* \brief Check a given mbedtls_x509_time against the system time
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* and tell if it's in the future.
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*
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* \note Intended usage is "if( is_future( valid_from ) ) ERROR".
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* Hence the return value of 1 if on internal errors.
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*
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* \param time mbedtls_x509_time to check
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*
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* \return 1 if the given time is in the future or an error occured,
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* 0 otherwise.
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*/
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int mbedtls_x509_time_is_future( const mbedtls_x509_time *time );
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_x509_self_test( int verbose );
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/*
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* Internal module functions. You probably do not want to use these unless you
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* know you do.
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*/
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int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end,
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mbedtls_x509_name *cur );
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int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end,
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mbedtls_x509_buf *alg );
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int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end,
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mbedtls_x509_buf *alg, mbedtls_x509_buf *params );
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#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
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int mbedtls_x509_get_rsassa_pss_params( const mbedtls_x509_buf *params,
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mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
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int *salt_len );
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#endif
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int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig );
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int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
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mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
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void **sig_opts );
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int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end,
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mbedtls_x509_time *time );
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int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
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mbedtls_x509_buf *serial );
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int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
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mbedtls_x509_buf *ext, int tag );
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int mbedtls_x509_sig_alg_gets( char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
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mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
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const void *sig_opts );
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int mbedtls_x509_key_size_helper( char *buf, size_t buf_size, const char *name );
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int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name );
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int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
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int critical, const unsigned char *val,
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size_t val_len );
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int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
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mbedtls_asn1_named_data *first );
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int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
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mbedtls_asn1_named_data *first );
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int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
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const char *oid, size_t oid_len,
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unsigned char *sig, size_t size );
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#define MBEDTLS_X509_SAFE_SNPRINTF \
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do { \
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if( ret < 0 || (size_t) ret >= n ) \
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return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL ); \
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\
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n -= (size_t) ret; \
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p += (size_t) ret; \
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} while( 0 )
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#ifdef __cplusplus
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}
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#endif
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#endif /* x509.h */
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