[398] | 1 | /**
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| 2 | * \file x509.h
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| 3 | *
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| 4 | * \brief X.509 generic defines and structures
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| 5 | */
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| 6 | /*
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| 7 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 8 | * SPDX-License-Identifier: Apache-2.0
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| 9 | *
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| 10 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 11 | * not use this file except in compliance with the License.
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| 12 | * You may obtain a copy of the License at
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| 13 | *
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| 14 | * http://www.apache.org/licenses/LICENSE-2.0
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| 15 | *
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| 16 | * Unless required by applicable law or agreed to in writing, software
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| 17 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 18 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 19 | * See the License for the specific language governing permissions and
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| 20 | * limitations under the License.
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| 21 | *
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| 22 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 23 | */
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| 24 | #ifndef MBEDTLS_X509_H
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| 25 | #define MBEDTLS_X509_H
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| 26 |
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| 27 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 28 | #include "config.h"
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| 29 | #else
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| 30 | #include MBEDTLS_CONFIG_FILE
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| 31 | #endif
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| 32 |
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| 33 | #include "asn1.h"
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| 34 | #include "pk.h"
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| 35 |
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| 36 | #if defined(MBEDTLS_RSA_C)
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| 37 | #include "rsa.h"
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| 38 | #endif
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| 39 |
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| 40 | /**
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| 41 | * \addtogroup x509_module
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| 42 | * \{
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| 43 | */
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| 44 |
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| 45 | #if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
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| 46 | /**
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| 47 | * Maximum number of intermediate CAs in a verification chain.
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| 48 | * That is, maximum length of the chain, excluding the end-entity certificate
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| 49 | * and the trusted root certificate.
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| 50 | *
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| 51 | * Set this to a low value to prevent an adversary from making you waste
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| 52 | * resources verifying an overlong certificate chain.
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| 53 | */
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| 54 | #define MBEDTLS_X509_MAX_INTERMEDIATE_CA 8
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| 55 | #endif
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| 56 |
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| 57 | /**
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| 58 | * \name X509 Error codes
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| 59 | * \{
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| 60 | */
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| 61 | #define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080 /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
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| 62 | #define MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100 /**< Requested OID is unknown. */
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| 63 | #define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
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| 64 | #define MBEDTLS_ERR_X509_INVALID_VERSION -0x2200 /**< The CRT/CRL/CSR version element is invalid. */
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| 65 | #define MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280 /**< The serial tag or value is invalid. */
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| 66 | #define MBEDTLS_ERR_X509_INVALID_ALG -0x2300 /**< The algorithm tag or value is invalid. */
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| 67 | #define MBEDTLS_ERR_X509_INVALID_NAME -0x2380 /**< The name tag or value is invalid. */
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| 68 | #define MBEDTLS_ERR_X509_INVALID_DATE -0x2400 /**< The date tag or value is invalid. */
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| 69 | #define MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480 /**< The signature tag or value invalid. */
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| 70 | #define MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500 /**< The extension tag or value is invalid. */
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| 71 | #define MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580 /**< CRT/CRL/CSR has an unsupported version number. */
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| 72 | #define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600 /**< Signature algorithm (oid) is unsupported. */
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| 73 | #define MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680 /**< Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
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| 74 | #define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700 /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
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| 75 | #define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 /**< Format not recognized as DER or PEM. */
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| 76 | #define MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800 /**< Input invalid. */
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| 77 | #define MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880 /**< Allocation of memory failed. */
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| 78 | #define MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900 /**< Read/write of file failed. */
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| 79 | #define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980 /**< Destination buffer is too small. */
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| 80 | #define MBEDTLS_ERR_X509_FATAL_ERROR -0x3000 /**< A fatal error occured, eg the chain is too long or the vrfy callback failed. */
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| 81 | /* \} name */
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| 82 |
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| 83 | /**
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| 84 | * \name X509 Verify codes
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| 85 | * \{
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| 86 | */
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| 87 | /* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
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| 88 | #define MBEDTLS_X509_BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */
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| 89 | #define MBEDTLS_X509_BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */
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| 90 | #define MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */
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| 91 | #define MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */
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| 92 | #define MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 /**< The CRL is not correctly signed by the trusted CA. */
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| 93 | #define MBEDTLS_X509_BADCRL_EXPIRED 0x20 /**< The CRL is expired. */
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| 94 | #define MBEDTLS_X509_BADCERT_MISSING 0x40 /**< Certificate was missing. */
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| 95 | #define MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */
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| 96 | #define MBEDTLS_X509_BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */
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| 97 | #define MBEDTLS_X509_BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */
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| 98 | #define MBEDTLS_X509_BADCRL_FUTURE 0x0400 /**< The CRL is from the future */
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| 99 | #define MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 /**< Usage does not match the keyUsage extension. */
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| 100 | #define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 /**< Usage does not match the extendedKeyUsage extension. */
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| 101 | #define MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 /**< Usage does not match the nsCertType extension. */
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| 102 | #define MBEDTLS_X509_BADCERT_BAD_MD 0x4000 /**< The certificate is signed with an unacceptable hash. */
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| 103 | #define MBEDTLS_X509_BADCERT_BAD_PK 0x8000 /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
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| 104 | #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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| 105 | #define MBEDTLS_X509_BADCRL_BAD_MD 0x020000 /**< The CRL is signed with an unacceptable hash. */
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| 106 | #define MBEDTLS_X509_BADCRL_BAD_PK 0x040000 /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
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| 107 | #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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| 108 |
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| 109 | /* \} name */
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| 110 | /* \} addtogroup x509_module */
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| 111 |
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| 112 | /*
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| 113 | * X.509 v3 Key Usage Extension flags
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| 114 | * Reminder: update x509_info_key_usage() when adding new flags.
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| 115 | */
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| 116 | #define MBEDTLS_X509_KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */
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| 117 | #define MBEDTLS_X509_KU_NON_REPUDIATION (0x40) /* bit 1 */
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| 118 | #define MBEDTLS_X509_KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */
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| 119 | #define MBEDTLS_X509_KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */
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| 120 | #define MBEDTLS_X509_KU_KEY_AGREEMENT (0x08) /* bit 4 */
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| 121 | #define MBEDTLS_X509_KU_KEY_CERT_SIGN (0x04) /* bit 5 */
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| 122 | #define MBEDTLS_X509_KU_CRL_SIGN (0x02) /* bit 6 */
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| 123 | #define MBEDTLS_X509_KU_ENCIPHER_ONLY (0x01) /* bit 7 */
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| 124 | #define MBEDTLS_X509_KU_DECIPHER_ONLY (0x8000) /* bit 8 */
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| 125 |
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| 126 | /*
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| 127 | * Netscape certificate types
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| 128 | * (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
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| 129 | */
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| 130 |
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| 131 | #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */
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| 132 | #define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */
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| 133 | #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */
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| 134 | #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */
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| 135 | #define MBEDTLS_X509_NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */
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| 136 | #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */
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| 137 | #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */
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| 138 | #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA (0x01) /* bit 7 */
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| 139 |
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| 140 | /*
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| 141 | * X.509 extension types
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| 142 | *
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| 143 | * Comments refer to the status for using certificates. Status can be
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| 144 | * different for writing certificates or reading CRLs or CSRs.
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| 145 | */
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| 146 | #define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER (1 << 0)
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| 147 | #define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER (1 << 1)
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| 148 | #define MBEDTLS_X509_EXT_KEY_USAGE (1 << 2)
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| 149 | #define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES (1 << 3)
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| 150 | #define MBEDTLS_X509_EXT_POLICY_MAPPINGS (1 << 4)
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| 151 | #define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME (1 << 5) /* Supported (DNS) */
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| 152 | #define MBEDTLS_X509_EXT_ISSUER_ALT_NAME (1 << 6)
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| 153 | #define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS (1 << 7)
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| 154 | #define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS (1 << 8) /* Supported */
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| 155 | #define MBEDTLS_X509_EXT_NAME_CONSTRAINTS (1 << 9)
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| 156 | #define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS (1 << 10)
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| 157 | #define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE (1 << 11)
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| 158 | #define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS (1 << 12)
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| 159 | #define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY (1 << 13)
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| 160 | #define MBEDTLS_X509_EXT_FRESHEST_CRL (1 << 14)
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| 161 |
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| 162 | #define MBEDTLS_X509_EXT_NS_CERT_TYPE (1 << 16)
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| 163 |
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| 164 | /*
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| 165 | * Storage format identifiers
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| 166 | * Recognized formats: PEM and DER
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| 167 | */
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| 168 | #define MBEDTLS_X509_FORMAT_DER 1
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| 169 | #define MBEDTLS_X509_FORMAT_PEM 2
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| 170 |
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| 171 | #define MBEDTLS_X509_MAX_DN_NAME_SIZE 256 /**< Maximum value size of a DN entry */
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| 172 |
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| 173 | #ifdef __cplusplus
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| 174 | extern "C" {
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| 175 | #endif
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| 176 |
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| 177 | /**
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| 178 | * \addtogroup x509_module
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| 179 | * \{ */
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| 180 |
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| 181 | /**
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| 182 | * \name Structures for parsing X.509 certificates, CRLs and CSRs
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| 183 | * \{
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| 184 | */
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| 185 |
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| 186 | /**
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| 187 | * Type-length-value structure that allows for ASN1 using DER.
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| 188 | */
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| 189 | typedef mbedtls_asn1_buf mbedtls_x509_buf;
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| 190 |
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| 191 | /**
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| 192 | * Container for ASN1 bit strings.
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| 193 | */
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| 194 | typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring;
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| 195 |
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| 196 | /**
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| 197 | * Container for ASN1 named information objects.
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| 198 | * It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
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| 199 | */
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| 200 | typedef mbedtls_asn1_named_data mbedtls_x509_name;
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| 201 |
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| 202 | /**
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| 203 | * Container for a sequence of ASN.1 items
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| 204 | */
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| 205 | typedef mbedtls_asn1_sequence mbedtls_x509_sequence;
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| 206 |
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| 207 | /** Container for date and time (precision in seconds). */
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| 208 | typedef struct mbedtls_x509_time
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| 209 | {
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| 210 | int year, mon, day; /**< Date. */
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| 211 | int hour, min, sec; /**< Time. */
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| 212 | }
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| 213 | mbedtls_x509_time;
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| 214 |
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| 215 | /** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
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| 216 | /** \} addtogroup x509_module */
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| 217 |
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| 218 | /**
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| 219 | * \brief Store the certificate DN in printable form into buf;
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| 220 | * no more than size characters will be written.
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| 221 | *
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| 222 | * \param buf Buffer to write to
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| 223 | * \param size Maximum size of buffer
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| 224 | * \param dn The X509 name to represent
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| 225 | *
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| 226 | * \return The length of the string written (not including the
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| 227 | * terminated nul byte), or a negative error code.
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| 228 | */
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| 229 | int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn );
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| 230 |
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| 231 | /**
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| 232 | * \brief Store the certificate serial in printable form into buf;
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| 233 | * no more than size characters will be written.
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| 234 | *
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| 235 | * \param buf Buffer to write to
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| 236 | * \param size Maximum size of buffer
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| 237 | * \param serial The X509 serial to represent
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| 238 | *
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| 239 | * \return The length of the string written (not including the
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| 240 | * terminated nul byte), or a negative error code.
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| 241 | */
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| 242 | int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial );
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| 243 |
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| 244 | /**
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| 245 | * \brief Check a given mbedtls_x509_time against the system time
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| 246 | * and tell if it's in the past.
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| 247 | *
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| 248 | * \note Intended usage is "if( is_past( valid_to ) ) ERROR".
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| 249 | * Hence the return value of 1 if on internal errors.
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| 250 | *
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| 251 | * \param to mbedtls_x509_time to check
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| 252 | *
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| 253 | * \return 1 if the given time is in the past or an error occured,
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| 254 | * 0 otherwise.
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| 255 | */
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| 256 | int mbedtls_x509_time_is_past( const mbedtls_x509_time *to );
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| 257 |
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| 258 | /**
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| 259 | * \brief Check a given mbedtls_x509_time against the system time
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| 260 | * and tell if it's in the future.
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| 261 | *
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| 262 | * \note Intended usage is "if( is_future( valid_from ) ) ERROR".
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| 263 | * Hence the return value of 1 if on internal errors.
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| 264 | *
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| 265 | * \param from mbedtls_x509_time to check
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| 266 | *
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| 267 | * \return 1 if the given time is in the future or an error occured,
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| 268 | * 0 otherwise.
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| 269 | */
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| 270 | int mbedtls_x509_time_is_future( const mbedtls_x509_time *from );
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| 271 |
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| 272 | #if defined(MBEDTLS_SELF_TEST)
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| 273 |
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| 274 | /**
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| 275 | * \brief Checkup routine
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| 276 | *
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| 277 | * \return 0 if successful, or 1 if the test failed
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| 278 | */
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| 279 | int mbedtls_x509_self_test( int verbose );
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| 280 |
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| 281 | #endif /* MBEDTLS_SELF_TEST */
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| 282 |
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| 283 | /*
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| 284 | * Internal module functions. You probably do not want to use these unless you
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| 285 | * know you do.
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| 286 | */
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| 287 | int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end,
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| 288 | mbedtls_x509_name *cur );
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| 289 | int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end,
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| 290 | mbedtls_x509_buf *alg );
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| 291 | int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end,
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| 292 | mbedtls_x509_buf *alg, mbedtls_x509_buf *params );
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| 293 | #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
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| 294 | int mbedtls_x509_get_rsassa_pss_params( const mbedtls_x509_buf *params,
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| 295 | mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
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| 296 | int *salt_len );
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| 297 | #endif
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| 298 | int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig );
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| 299 | int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
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| 300 | mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
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| 301 | void **sig_opts );
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| 302 | int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end,
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| 303 | mbedtls_x509_time *t );
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| 304 | int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
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| 305 | mbedtls_x509_buf *serial );
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| 306 | int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
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| 307 | mbedtls_x509_buf *ext, int tag );
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| 308 | int mbedtls_x509_sig_alg_gets( char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
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| 309 | mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
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| 310 | const void *sig_opts );
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| 311 | int mbedtls_x509_key_size_helper( char *buf, size_t buf_size, const char *name );
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| 312 | int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name );
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| 313 | int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
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| 314 | int critical, const unsigned char *val,
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| 315 | size_t val_len );
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| 316 | int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
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| 317 | mbedtls_asn1_named_data *first );
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| 318 | int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
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| 319 | mbedtls_asn1_named_data *first );
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| 320 | int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
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| 321 | const char *oid, size_t oid_len,
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| 322 | unsigned char *sig, size_t size );
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| 323 |
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| 324 | #define MBEDTLS_X509_SAFE_SNPRINTF \
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| 325 | do { \
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| 326 | if( ret < 0 || (size_t) ret >= n ) \
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| 327 | return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL ); \
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| 328 | \
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| 329 | n -= (size_t) ret; \
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| 330 | p += (size_t) ret; \
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| 331 | } while( 0 )
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| 332 |
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| 333 | #ifdef __cplusplus
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| 334 | }
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| 335 | #endif
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| 336 |
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| 337 | #endif /* x509.h */
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