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317 lines
12 KiB
C
Executable file
317 lines
12 KiB
C
Executable file
/**
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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) 2006-2014, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_X509_H
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#define POLARSSL_X509_H
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#if !defined(POLARSSL_CONFIG_FILE)
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#include "config.h"
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#else
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#include POLARSSL_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(POLARSSL_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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/**
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* \name X509 Error codes
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* \{
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*/
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#define POLARSSL_ERR_X509_FEATURE_UNAVAILABLE -0x2080 /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
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#define POLARSSL_ERR_X509_UNKNOWN_OID -0x2100 /**< Requested OID is unknown. */
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#define POLARSSL_ERR_X509_INVALID_FORMAT -0x2180 /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
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#define POLARSSL_ERR_X509_INVALID_VERSION -0x2200 /**< The CRT/CRL/CSR version element is invalid. */
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#define POLARSSL_ERR_X509_INVALID_SERIAL -0x2280 /**< The serial tag or value is invalid. */
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#define POLARSSL_ERR_X509_INVALID_ALG -0x2300 /**< The algorithm tag or value is invalid. */
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#define POLARSSL_ERR_X509_INVALID_NAME -0x2380 /**< The name tag or value is invalid. */
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#define POLARSSL_ERR_X509_INVALID_DATE -0x2400 /**< The date tag or value is invalid. */
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#define POLARSSL_ERR_X509_INVALID_SIGNATURE -0x2480 /**< The signature tag or value invalid. */
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#define POLARSSL_ERR_X509_INVALID_EXTENSIONS -0x2500 /**< The extension tag or value is invalid. */
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#define POLARSSL_ERR_X509_UNKNOWN_VERSION -0x2580 /**< CRT/CRL/CSR has an unsupported version number. */
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#define POLARSSL_ERR_X509_UNKNOWN_SIG_ALG -0x2600 /**< Signature algorithm (oid) is unsupported. */
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#define POLARSSL_ERR_X509_SIG_MISMATCH -0x2680 /**< Signature algorithms do not match. (see \c ::x509_crt sig_oid) */
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#define POLARSSL_ERR_X509_CERT_VERIFY_FAILED -0x2700 /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
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#define POLARSSL_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 /**< Format not recognized as DER or PEM. */
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#define POLARSSL_ERR_X509_BAD_INPUT_DATA -0x2800 /**< Input invalid. */
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#define POLARSSL_ERR_X509_MALLOC_FAILED -0x2880 /**< Allocation of memory failed. */
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#define POLARSSL_ERR_X509_FILE_IO_ERROR -0x2900 /**< Read/write of file failed. */
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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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#define BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */
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#define BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */
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#define BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */
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#define BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */
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#define BADCRL_NOT_TRUSTED 0x10 /**< CRL is not correctly signed by the trusted CA. */
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#define BADCRL_EXPIRED 0x20 /**< CRL is expired. */
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#define BADCERT_MISSING 0x40 /**< Certificate was missing. */
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#define BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */
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#define BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */
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#define BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */
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#define BADCRL_FUTURE 0x0400 /**< The CRL is from the future */
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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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*/
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#define KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */
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#define KU_NON_REPUDIATION (0x40) /* bit 1 */
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#define KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */
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#define KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */
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#define KU_KEY_AGREEMENT (0x08) /* bit 4 */
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#define KU_KEY_CERT_SIGN (0x04) /* bit 5 */
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#define KU_CRL_SIGN (0x02) /* bit 6 */
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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 NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */
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#define NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */
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#define NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */
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#define NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */
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#define NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */
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#define NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */
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#define NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */
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#define 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 EXT_AUTHORITY_KEY_IDENTIFIER (1 << 0)
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#define EXT_SUBJECT_KEY_IDENTIFIER (1 << 1)
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#define EXT_KEY_USAGE (1 << 2) /* Parsed but not used */
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#define EXT_CERTIFICATE_POLICIES (1 << 3)
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#define EXT_POLICY_MAPPINGS (1 << 4)
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#define EXT_SUBJECT_ALT_NAME (1 << 5) /* Supported (DNS) */
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#define EXT_ISSUER_ALT_NAME (1 << 6)
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#define EXT_SUBJECT_DIRECTORY_ATTRS (1 << 7)
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#define EXT_BASIC_CONSTRAINTS (1 << 8) /* Supported */
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#define EXT_NAME_CONSTRAINTS (1 << 9)
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#define EXT_POLICY_CONSTRAINTS (1 << 10)
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#define EXT_EXTENDED_KEY_USAGE (1 << 11) /* Parsed but not used */
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#define EXT_CRL_DISTRIBUTION_POINTS (1 << 12)
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#define EXT_INIHIBIT_ANYPOLICY (1 << 13)
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#define EXT_FRESHEST_CRL (1 << 14)
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#define 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 X509_FORMAT_DER 1
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#define X509_FORMAT_PEM 2
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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 asn1_buf x509_buf;
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/**
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* Container for ASN1 bit strings.
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*/
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typedef asn1_bitstring 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=polarssl,ou=code,etc.).
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*/
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typedef asn1_named_data 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 asn1_sequence x509_sequence;
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/** Container for date and time (precision in seconds). */
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typedef struct _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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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 amount of data written to the buffer, or -1 in
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* case of an error.
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*/
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int x509_dn_gets( char *buf, size_t size, const 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 amount of data written to the buffer, or -1 in
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* case of an error.
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*/
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int x509_serial_gets( char *buf, size_t size, const x509_buf *serial );
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/**
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* \brief Give an known OID, return its descriptive string.
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* (Deprecated. Use oid_get_extended_key_usage() instead.)
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* Warning: only works for extended_key_usage OIDs!
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*
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* \param oid buffer containing the oid
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*
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* \return Return a string if the OID is known,
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* or NULL otherwise.
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*/
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const char *x509_oid_get_description( x509_buf *oid );
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/**
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* \brief Give an OID, return a string version of its OID number.
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* (Deprecated. Use oid_get_numeric_string() instead)
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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 oid Buffer containing the OID
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*
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* \return Length of the string written (excluding final NULL) or
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* POLARSSL_ERR_OID_BUF_TO_SMALL in case of error
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*/
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int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid );
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/**
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* \brief Check a given x509_time against the system time and check
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* if it is not expired.
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*
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* \param time x509_time to check
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*
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* \return 0 if the x509_time is still valid,
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* 1 otherwise.
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*/
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int x509_time_expired( const x509_time *time );
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/**
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* \brief Check a given x509_time against the system time and check
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* if it is not from the future.
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*
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* \param time x509_time to check
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*
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* \return 0 if the x509_time is already valid,
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* 1 otherwise.
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*/
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int x509_time_future( const 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 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 x509_get_name( unsigned char **p, const unsigned char *end,
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x509_name *cur );
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int x509_get_alg_null( unsigned char **p, const unsigned char *end,
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x509_buf *alg );
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int x509_get_alg( unsigned char **p, const unsigned char *end,
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x509_buf *alg, x509_buf *params );
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#if defined(POLARSSL_X509_RSASSA_PSS_SUPPORT)
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int x509_get_rsassa_pss_params( const x509_buf *params,
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md_type_t *md_alg, md_type_t *mgf_md,
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int *salt_len );
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#endif
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int x509_get_sig( unsigned char **p, const unsigned char *end, x509_buf *sig );
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int x509_get_sig_alg( const x509_buf *sig_oid, const x509_buf *sig_params,
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md_type_t *md_alg, pk_type_t *pk_alg,
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void **sig_opts );
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int x509_get_time( unsigned char **p, const unsigned char *end,
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x509_time *time );
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int x509_get_serial( unsigned char **p, const unsigned char *end,
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x509_buf *serial );
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int x509_get_ext( unsigned char **p, const unsigned char *end,
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x509_buf *ext, int tag );
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int x509_load_file( const char *path, unsigned char **buf, size_t *n );
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int x509_sig_alg_gets( char *buf, size_t size, const x509_buf *sig_oid,
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pk_type_t pk_alg, md_type_t md_alg,
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const void *sig_opts );
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int x509_key_size_helper( char *buf, size_t size, const char *name );
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int x509_string_to_names( asn1_named_data **head, const char *name );
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int x509_set_extension( 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 x509_write_extensions( unsigned char **p, unsigned char *start,
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asn1_named_data *first );
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int x509_write_names( unsigned char **p, unsigned char *start,
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asn1_named_data *first );
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int 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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#ifdef __cplusplus
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}
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#endif
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#endif /* x509.h */
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