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mbedtls/include/polarssl/x509.h

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/**
* \file x509.h
*
* \brief X.509 certificate and private key decoding
*
* Copyright (C) 2006-2011, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef POLARSSL_X509_H
#define POLARSSL_X509_H
#include "asn1.h"
#include "rsa.h"
#include "dhm.h"
/**
* \addtogroup x509_module
* \{
*/
/**
* \name X509 Error codes
* \{
*/
#define POLARSSL_ERR_X509_FEATURE_UNAVAILABLE -0x2080 /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
#define POLARSSL_ERR_X509_CERT_INVALID_PEM -0x2100 /**< The PEM-encoded certificate contains invalid elements, e.g. invalid character. */
#define POLARSSL_ERR_X509_CERT_INVALID_FORMAT -0x2180 /**< The certificate format is invalid, e.g. different type expected. */
#define POLARSSL_ERR_X509_CERT_INVALID_VERSION -0x2200 /**< The certificate version element is invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_SERIAL -0x2280 /**< The serial tag or value is invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_ALG -0x2300 /**< The algorithm tag or value is invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_NAME -0x2380 /**< The name tag or value is invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_DATE -0x2400 /**< The date tag or value is invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_PUBKEY -0x2480 /**< The pubkey tag or value is invalid (only RSA is supported). */
#define POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE -0x2500 /**< The signature tag or value invalid. */
#define POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS -0x2580 /**< The extension tag or value is invalid. */
#define POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION -0x2600 /**< Certificate or CRL has an unsupported version number. */
#define POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG -0x2680 /**< Signature algorithm (oid) is unsupported. */
#define POLARSSL_ERR_X509_UNKNOWN_PK_ALG -0x2700 /**< Key algorithm is unsupported (only RSA is supported). */
#define POLARSSL_ERR_X509_CERT_SIG_MISMATCH -0x2780 /**< Certificate signature algorithms do not match. (see \c ::x509_cert sig_oid) */
#define POLARSSL_ERR_X509_CERT_VERIFY_FAILED -0x2800 /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
#define POLARSSL_ERR_X509_KEY_INVALID_VERSION -0x2880 /**< Unsupported RSA key version */
#define POLARSSL_ERR_X509_KEY_INVALID_FORMAT -0x2900 /**< Invalid RSA key tag or value. */
#define POLARSSL_ERR_X509_CERT_UNKNOWN_FORMAT -0x2980 /**< Format not recognized as DER or PEM. */
#define POLARSSL_ERR_X509_INVALID_INPUT -0x2A00 /**< Input invalid. */
#define POLARSSL_ERR_X509_MALLOC_FAILED -0x2A80 /**< Allocation of memory failed. */
#define POLARSSL_ERR_X509_FILE_IO_ERROR -0x2B00 /**< Read/write of file failed. */
/* \} name */
/**
* \name X509 Verify codes
* \{
*/
#define BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */
#define BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */
#define BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */
#define BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */
#define BADCRL_NOT_TRUSTED 0x10 /**< CRL is not correctly signed by the trusted CA. */
#define BADCRL_EXPIRED 0x20 /**< CRL is expired. */
#define BADCERT_MISSING 0x40 /**< Certificate was missing. */
#define BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */
#define BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */
/* \} name */
/* \} addtogroup x509_module */
/*
* various object identifiers
*/
#define X520_COMMON_NAME 3
#define X520_COUNTRY 6
#define X520_LOCALITY 7
#define X520_STATE 8
#define X520_ORGANIZATION 10
#define X520_ORG_UNIT 11
#define PKCS9_EMAIL 1
#define X509_OUTPUT_DER 0x01
#define X509_OUTPUT_PEM 0x02
#define PEM_LINE_LENGTH 72
#define X509_ISSUER 0x01
#define X509_SUBJECT 0x02
#define OID_X520 "\x55\x04"
#define OID_CN OID_X520 "\x03"
#define OID_COUNTRY OID_X520 "\x06"
#define OID_LOCALITY OID_X520 "\x07"
#define OID_STATE OID_X520 "\x08"
#define OID_ORGANIZATION OID_X520 "\x0A"
#define OID_ORG_UNIT OID_X520 "\x0B"
#define OID_PKCS1 "\x2A\x86\x48\x86\xF7\x0D\x01\x01"
#define OID_PKCS1_RSA OID_PKCS1 "\x01"
#define OID_PKCS1_SHA1 OID_PKCS1 "\x05"
#define OID_RSA_SHA_OBS "\x2B\x0E\x03\x02\x1D"
#define OID_PKCS9 "\x2A\x86\x48\x86\xF7\x0D\x01\x09"
#define OID_PKCS9_EMAIL OID_PKCS9 "\x01"
/** ISO arc for standard certificate and CRL extensions */
#define OID_ID_CE "\x55\x1D" /**< id-ce OBJECT IDENTIFIER ::= {joint-iso-ccitt(2) ds(5) 29} */
/**
* Private Internet Extensions
* { iso(1) identified-organization(3) dod(6) internet(1)
* security(5) mechanisms(5) pkix(7) }
*/
#define OID_PKIX "\x2B\x06\x01\x05\x05\x07"
/*
* OIDs for standard certificate extensions
*/
#define OID_AUTHORITY_KEY_IDENTIFIER OID_ID_CE "\x23" /**< id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 35 } */
#define OID_SUBJECT_KEY_IDENTIFIER OID_ID_CE "\x0E" /**< id-ce-subjectKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 14 } */
#define OID_KEY_USAGE OID_ID_CE "\x0F" /**< id-ce-keyUsage OBJECT IDENTIFIER ::= { id-ce 15 } */
#define OID_CERTIFICATE_POLICIES OID_ID_CE "\x20" /**< id-ce-certificatePolicies OBJECT IDENTIFIER ::= { id-ce 32 } */
#define OID_POLICY_MAPPINGS OID_ID_CE "\x21" /**< id-ce-policyMappings OBJECT IDENTIFIER ::= { id-ce 33 } */
#define OID_SUBJECT_ALT_NAME OID_ID_CE "\x11" /**< id-ce-subjectAltName OBJECT IDENTIFIER ::= { id-ce 17 } */
#define OID_ISSUER_ALT_NAME OID_ID_CE "\x12" /**< id-ce-issuerAltName OBJECT IDENTIFIER ::= { id-ce 18 } */
#define OID_SUBJECT_DIRECTORY_ATTRS OID_ID_CE "\x09" /**< id-ce-subjectDirectoryAttributes OBJECT IDENTIFIER ::= { id-ce 9 } */
#define OID_BASIC_CONSTRAINTS OID_ID_CE "\x13" /**< id-ce-basicConstraints OBJECT IDENTIFIER ::= { id-ce 19 } */
#define OID_NAME_CONSTRAINTS OID_ID_CE "\x1E" /**< id-ce-nameConstraints OBJECT IDENTIFIER ::= { id-ce 30 } */
#define OID_POLICY_CONSTRAINTS OID_ID_CE "\x24" /**< id-ce-policyConstraints OBJECT IDENTIFIER ::= { id-ce 36 } */
#define OID_EXTENDED_KEY_USAGE OID_ID_CE "\x25" /**< id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 } */
#define OID_CRL_DISTRIBUTION_POINTS OID_ID_CE "\x1F" /**< id-ce-cRLDistributionPoints OBJECT IDENTIFIER ::= { id-ce 31 } */
#define OID_INIHIBIT_ANYPOLICY OID_ID_CE "\x36" /**< id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::= { id-ce 54 } */
#define OID_FRESHEST_CRL OID_ID_CE "\x2E" /**< id-ce-freshestCRL OBJECT IDENTIFIER ::= { id-ce 46 } */
/*
* X.509 v3 Key Usage Extension flags
*/
#define KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */
#define KU_NON_REPUDIATION (0x40) /* bit 1 */
#define KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */
#define KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */
#define KU_KEY_AGREEMENT (0x08) /* bit 4 */
#define KU_KEY_CERT_SIGN (0x04) /* bit 5 */
#define KU_CRL_SIGN (0x02) /* bit 6 */
/*
* X.509 v3 Extended key usage OIDs
*/
#define OID_ANY_EXTENDED_KEY_USAGE OID_EXTENDED_KEY_USAGE "\x00" /**< anyExtendedKeyUsage OBJECT IDENTIFIER ::= { id-ce-extKeyUsage 0 } */
#define OID_KP OID_PKIX "\x03" /**< id-kp OBJECT IDENTIFIER ::= { id-pkix 3 } */
#define OID_SERVER_AUTH OID_KP "\x01" /**< id-kp-serverAuth OBJECT IDENTIFIER ::= { id-kp 1 } */
#define OID_CLIENT_AUTH OID_KP "\x02" /**< id-kp-clientAuth OBJECT IDENTIFIER ::= { id-kp 2 } */
#define OID_CODE_SIGNING OID_KP "\x03" /**< id-kp-codeSigning OBJECT IDENTIFIER ::= { id-kp 3 } */
#define OID_EMAIL_PROTECTION OID_KP "\x04" /**< id-kp-emailProtection OBJECT IDENTIFIER ::= { id-kp 4 } */
#define OID_TIME_STAMPING OID_KP "\x08" /**< id-kp-timeStamping OBJECT IDENTIFIER ::= { id-kp 8 } */
#define OID_OCSP_SIGNING OID_KP "\x09" /**< id-kp-OCSPSigning OBJECT IDENTIFIER ::= { id-kp 9 } */
#define STRING_SERVER_AUTH "TLS Web Server Authentication"
#define STRING_CLIENT_AUTH "TLS Web Client Authentication"
#define STRING_CODE_SIGNING "Code Signing"
#define STRING_EMAIL_PROTECTION "E-mail Protection"
#define STRING_TIME_STAMPING "Time Stamping"
#define STRING_OCSP_SIGNING "OCSP Signing"
/*
* OIDs for CRL extensions
*/
#define OID_PRIVATE_KEY_USAGE_PERIOD OID_ID_CE "\x10"
#define OID_CRL_NUMBER OID_ID_CE "\x14" /**< id-ce-cRLNumber OBJECT IDENTIFIER ::= { id-ce 20 } */
/*
* Netscape certificate extensions
*/
#define OID_NETSCAPE "\x60\x86\x48\x01\x86\xF8\x42" /**< Netscape OID */
#define OID_NS_CERT OID_NETSCAPE "\x01"
#define OID_NS_CERT_TYPE OID_NS_CERT "\x01"
#define OID_NS_BASE_URL OID_NS_CERT "\x02"
#define OID_NS_REVOCATION_URL OID_NS_CERT "\x03"
#define OID_NS_CA_REVOCATION_URL OID_NS_CERT "\x04"
#define OID_NS_RENEWAL_URL OID_NS_CERT "\x07"
#define OID_NS_CA_POLICY_URL OID_NS_CERT "\x08"
#define OID_NS_SSL_SERVER_NAME OID_NS_CERT "\x0C"
#define OID_NS_COMMENT OID_NS_CERT "\x0D"
#define OID_NS_DATA_TYPE OID_NETSCAPE "\x02"
#define OID_NS_CERT_SEQUENCE OID_NS_DATA_TYPE "\x05"
/*
* Netscape certificate types
* (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
*/
#define NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */
#define NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */
#define NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */
#define NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */
#define NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */
#define NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */
#define NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */
#define NS_CERT_TYPE_OBJECT_SIGNING_CA (0x01) /* bit 7 */
#define EXT_AUTHORITY_KEY_IDENTIFIER (1 << 0)
#define EXT_SUBJECT_KEY_IDENTIFIER (1 << 1)
#define EXT_KEY_USAGE (1 << 2)
#define EXT_CERTIFICATE_POLICIES (1 << 3)
#define EXT_POLICY_MAPPINGS (1 << 4)
#define EXT_SUBJECT_ALT_NAME (1 << 5)
#define EXT_ISSUER_ALT_NAME (1 << 6)
#define EXT_SUBJECT_DIRECTORY_ATTRS (1 << 7)
#define EXT_BASIC_CONSTRAINTS (1 << 8)
#define EXT_NAME_CONSTRAINTS (1 << 9)
#define EXT_POLICY_CONSTRAINTS (1 << 10)
#define EXT_EXTENDED_KEY_USAGE (1 << 11)
#define EXT_CRL_DISTRIBUTION_POINTS (1 << 12)
#define EXT_INIHIBIT_ANYPOLICY (1 << 13)
#define EXT_FRESHEST_CRL (1 << 14)
#define EXT_NS_CERT_TYPE (1 << 16)
/*
* Storage format identifiers
* Recognized formats: PEM and DER
*/
#define X509_FORMAT_DER 1
#define X509_FORMAT_PEM 2
/**
* \addtogroup x509_module
* \{ */
/**
* \name Structures for parsing X.509 certificates and CRLs
* \{
*/
/**
* Type-length-value structure that allows for ASN1 using DER.
*/
typedef asn1_buf x509_buf;
/**
* Container for ASN1 bit strings.
*/
typedef asn1_bitstring x509_bitstring;
/**
* Container for ASN1 named information objects.
* It allows for Relative Distinguished Names (e.g. cn=polarssl,ou=code,etc.).
*/
typedef struct _x509_name
{
x509_buf oid; /**< The object identifier. */
x509_buf val; /**< The named value. */
struct _x509_name *next; /**< The next named information object. */
}
x509_name;
/**
* Container for a sequence of ASN.1 items
*/
typedef asn1_sequence x509_sequence;
/** Container for date and time (precision in seconds). */
typedef struct _x509_time
{
int year, mon, day; /**< Date. */
int hour, min, sec; /**< Time. */
}
x509_time;
/**
* Container for an X.509 certificate. The certificate may be chained.
*/
typedef struct _x509_cert
{
x509_buf raw; /**< The raw certificate data (DER). */
x509_buf tbs; /**< The raw certificate body (DER). The part that is To Be Signed. */
int version; /**< The X.509 version. (0=v1, 1=v2, 2=v3) */
x509_buf serial; /**< Unique id for certificate issued by a specific CA. */
x509_buf sig_oid1; /**< Signature algorithm, e.g. sha1RSA */
x509_buf issuer_raw; /**< The raw issuer data (DER). Used for quick comparison. */
x509_buf subject_raw; /**< The raw subject data (DER). Used for quick comparison. */
x509_name issuer; /**< The parsed issuer data (named information object). */
x509_name subject; /**< The parsed subject data (named information object). */
x509_time valid_from; /**< Start time of certificate validity. */
x509_time valid_to; /**< End time of certificate validity. */
x509_buf pk_oid; /**< Subject public key info. Includes the public key algorithm and the key itself. */
rsa_context rsa; /**< Container for the RSA context. Only RSA is supported for public keys at this time. */
x509_buf issuer_id; /**< Optional X.509 v2/v3 issuer unique identifier. */
x509_buf subject_id; /**< Optional X.509 v2/v3 subject unique identifier. */
x509_buf v3_ext; /**< Optional X.509 v3 extensions. Only Basic Contraints are supported at this time. */
x509_sequence subject_alt_names; /**< Optional list of Subject Alternative Names (Only dNSName supported). */
int ext_types; /**< Bit string containing detected and parsed extensions */
int ca_istrue; /**< Optional Basic Constraint extension value: 1 if this certificate belongs to a CA, 0 otherwise. */
int max_pathlen; /**< Optional Basic Constraint extension value: The maximum path length to the root certificate. Path length is 1 higher than RFC 5280 'meaning', so 1+ */
unsigned char key_usage; /**< Optional key usage extension value: See the values below */
x509_sequence ext_key_usage; /**< Optional list of extended key usage OIDs. */
unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values below */
x509_buf sig_oid2; /**< Signature algorithm. Must match sig_oid1. */
x509_buf sig; /**< Signature: hash of the tbs part signed with the private key. */
int sig_alg; /**< Internal representation of the signature algorithm, e.g. SIG_RSA_MD2 */
struct _x509_cert *next; /**< Next certificate in the CA-chain. */
}
x509_cert;
/**
* Certificate revocation list entry.
* Contains the CA-specific serial numbers and revocation dates.
*/
typedef struct _x509_crl_entry
{
x509_buf raw;
x509_buf serial;
x509_time revocation_date;
x509_buf entry_ext;
struct _x509_crl_entry *next;
}
x509_crl_entry;
/**
* Certificate revocation list structure.
* Every CRL may have multiple entries.
*/
typedef struct _x509_crl
{
x509_buf raw; /**< The raw certificate data (DER). */
x509_buf tbs; /**< The raw certificate body (DER). The part that is To Be Signed. */
int version;
x509_buf sig_oid1;
x509_buf issuer_raw; /**< The raw issuer data (DER). */
x509_name issuer; /**< The parsed issuer data (named information object). */
x509_time this_update;
x509_time next_update;
x509_crl_entry entry; /**< The CRL entries containing the certificate revocation times for this CA. */
x509_buf crl_ext;
x509_buf sig_oid2;
x509_buf sig;
int sig_alg;
struct _x509_crl *next;
}
x509_crl;
/** \} name Structures for parsing X.509 certificates and CRLs */
/** \} addtogroup x509_module */
/**
* \name Structures for writing X.509 certificates.
* XvP: commented out as they are not used.
* - <tt>typedef struct _x509_node x509_node;</tt>
* - <tt>typedef struct _x509_raw x509_raw;</tt>
*/
/*
typedef struct _x509_node
{
unsigned char *data;
unsigned char *p;
unsigned char *end;
size_t len;
}
x509_node;
typedef struct _x509_raw
{
x509_node raw;
x509_node tbs;
x509_node version;
x509_node serial;
x509_node tbs_signalg;
x509_node issuer;
x509_node validity;
x509_node subject;
x509_node subpubkey;
x509_node signalg;
x509_node sign;
}
x509_raw;
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* \name Functions to read in DHM parameters, a certificate, CRL or private RSA key
* \{
*/
/** \ingroup x509_module */
/**
* \brief Parse one or more certificates and add them
* to the chained list. Parses permissively. If some
* certificates can be parsed, the result is the number
* of failed certificates it encountered. If none complete
* correctly, the first error is returned.
*
* \param chain points to the start of the chain
* \param buf buffer holding the certificate data
* \param buflen size of the buffer
*
* \return 0 if all certificates parsed successfully, a positive number
* if partly successful or a specific X509 or PEM error code
*/
int x509parse_crt( x509_cert *chain, const unsigned char *buf, size_t buflen );
/** \ingroup x509_module */
/**
* \brief Load one or more certificates and add them
* to the chained list. Parses permissively. If some
* certificates can be parsed, the result is the number
* of failed certificates it encountered. If none complete
* correctly, the first error is returned.
*
* \param chain points to the start of the chain
* \param path filename to read the certificates from
*
* \return 0 if all certificates parsed successfully, a positive number
* if partly successful or a specific X509 or PEM error code
*/
int x509parse_crtfile( x509_cert *chain, const char *path );
/** \ingroup x509_module */
/**
* \brief Load one or more certificate files from a path and add them
* to the chained list. Parses permissively. If some
* certificates can be parsed, the result is the number
* of failed certificates it encountered. If none complete
* correctly, the first error is returned.
*
* \param chain points to the start of the chain
* \param path directory / folder to read the certificate files from
*
* \return 0 if all certificates parsed successfully, a positive number
* if partly successful or a specific X509 or PEM error code
*/
int x509parse_crtpath( x509_cert *chain, const char *path );
/** \ingroup x509_module */
/**
* \brief Parse one or more CRLs and add them
* to the chained list
*
* \param chain points to the start of the chain
* \param buf buffer holding the CRL data
* \param buflen size of the buffer
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_crl( x509_crl *chain, const unsigned char *buf, size_t buflen );
/** \ingroup x509_module */
/**
* \brief Load one or more CRLs and add them
* to the chained list
*
* \param chain points to the start of the chain
* \param path filename to read the CRLs from
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_crlfile( x509_crl *chain, const char *path );
/** \ingroup x509_module */
/**
* \brief Parse a private RSA key
*
* \param rsa RSA context to be initialized
* \param key input buffer
* \param keylen size of the buffer
* \param pwd password for decryption (optional)
* \param pwdlen size of the password
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_key( rsa_context *rsa,
const unsigned char *key, size_t keylen,
const unsigned char *pwd, size_t pwdlen );
/** \ingroup x509_module */
/**
* \brief Load and parse a private RSA key
*
* \param rsa RSA context to be initialized
* \param path filename to read the private key from
* \param password password to decrypt the file (can be NULL)
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_keyfile( rsa_context *rsa, const char *path,
const char *password );
/** \ingroup x509_module */
/**
* \brief Parse a public RSA key
*
* \param rsa RSA context to be initialized
* \param key input buffer
* \param keylen size of the buffer
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_public_key( rsa_context *rsa,
const unsigned char *key, size_t keylen );
/** \ingroup x509_module */
/**
* \brief Load and parse a public RSA key
*
* \param rsa RSA context to be initialized
* \param path filename to read the private key from
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_public_keyfile( rsa_context *rsa, const char *path );
/** \ingroup x509_module */
/**
* \brief Parse DHM parameters
*
* \param dhm DHM context to be initialized
* \param dhmin input buffer
* \param dhminlen size of the buffer
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_dhm( dhm_context *dhm, const unsigned char *dhmin, size_t dhminlen );
/** \ingroup x509_module */
/**
* \brief Load and parse DHM parameters
*
* \param dhm DHM context to be initialized
* \param path filename to read the DHM Parameters from
*
* \return 0 if successful, or a specific X509 or PEM error code
*/
int x509parse_dhmfile( dhm_context *dhm, const char *path );
/** \} name Functions to read in DHM parameters, a certificate, CRL or private RSA key */
/**
* \brief Store the certificate DN in printable form into buf;
* no more than size characters will be written.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param dn The X509 name to represent
*
* \return The amount of data written to the buffer, or -1 in
* case of an error.
*/
int x509parse_dn_gets( char *buf, size_t size, const x509_name *dn );
/**
* \brief Store the certificate serial in printable form into buf;
* no more than size characters will be written.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param serial The X509 serial to represent
*
* \return The amount of data written to the buffer, or -1 in
* case of an error.
*/
int x509parse_serial_gets( char *buf, size_t size, const x509_buf *serial );
/**
* \brief Returns an informational string about the
* certificate.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param prefix A line prefix
* \param crt The X509 certificate to represent
*
* \return The amount of data written to the buffer, or -1 in
* case of an error.
*/
int x509parse_cert_info( char *buf, size_t size, const char *prefix,
const x509_cert *crt );
/**
* \brief Returns an informational string about the
* CRL.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param prefix A line prefix
* \param crl The X509 CRL to represent
*
* \return The amount of data written to the buffer, or -1 in
* case of an error.
*/
int x509parse_crl_info( char *buf, size_t size, const char *prefix,
const x509_crl *crl );
/**
* \brief Give an known OID, return its descriptive string.
*
* \param oid buffer containing the oid
*
* \return Return a string if the OID is known,
* or NULL otherwise.
*/
const char *x509_oid_get_description( x509_buf *oid );
/**
* \brief Give an OID, return a string version of its OID number.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param oid Buffer containing the OID
*
* \return The amount of data written to the buffer, or -1 in
* case of an error.
*/
int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid );
/**
* \brief Check a given x509_time against the system time and check
* if it is valid.
*
* \param time x509_time to check
*
* \return Return 0 if the x509_time is still valid,
* or 1 otherwise.
*/
int x509parse_time_expired( const x509_time *time );
/**
* \name Functions to verify a certificate
* \{
*/
/** \ingroup x509_module */
/**
* \brief Verify the certificate signature
*
* The verify callback is a user-supplied callback that
* can clear / modify / add flags for a certificate. If set,
* the verification callback is called for each
* certificate in the chain (from the trust-ca down to the
* presented crt). The parameters for the callback are:
* (void *parameter, x509_cert *crt, int certificate_depth,
* int *flags). With the flags representing current flags for
* that specific certificate and the certificate depth from
* the bottom (Peer cert depth = 0).
*
* All flags left after returning from the callback
* are also returned to the application. The function should
* return 0 for anything but a fatal error.
*
* \param crt a certificate to be verified
* \param trust_ca the trusted CA chain
* \param ca_crl the CRL chain for trusted CA's
* \param cn expected Common Name (can be set to
* NULL if the CN must not be verified)
* \param flags result of the verification
* \param f_vrfy verification function
* \param p_vrfy verification parameter
*
* \return 0 if successful or POLARSSL_ERR_X509_SIG_VERIFY_FAILED,
* in which case *flags will have one or more of
* the following values set:
* BADCERT_EXPIRED --
* BADCERT_REVOKED --
* BADCERT_CN_MISMATCH --
* BADCERT_NOT_TRUSTED
* or another error in case of a fatal error encountered
* during the verification process.
*/
int x509parse_verify( x509_cert *crt,
x509_cert *trust_ca,
x509_crl *ca_crl,
const char *cn, int *flags,
int (*f_vrfy)(void *, x509_cert *, int, int *),
void *p_vrfy );
/**
* \brief Verify the certificate signature
*
* \param crt a certificate to be verified
* \param crl the CRL to verify against
*
* \return 1 if the certificate is revoked, 0 otherwise
*
*/
int x509parse_revoked( const x509_cert *crt, const x509_crl *crl );
/** \} name Functions to verify a certificate */
/**
* \name Functions to clear a certificate, CRL or private RSA key
* \{
*/
/** \ingroup x509_module */
/**
* \brief Unallocate all certificate data
*
* \param crt Certificate chain to free
*/
void x509_free( x509_cert *crt );
/** \ingroup x509_module */
/**
* \brief Unallocate all CRL data
*
* \param crl CRL chain to free
*/
void x509_crl_free( x509_crl *crl );
/** \} name Functions to clear a certificate, CRL or private RSA key */
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int x509_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* x509.h */
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