/**
* \file x509.h
*
* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
*
* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
*
* 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 "polarssl/rsa.h"
#define POLARSSL_ERR_ASN1_OUT_OF_DATA -0x0014
#define POLARSSL_ERR_ASN1_UNEXPECTED_TAG -0x0016
#define POLARSSL_ERR_ASN1_INVALID_LENGTH -0x0018
#define POLARSSL_ERR_ASN1_LENGTH_MISMATCH -0x001A
#define POLARSSL_ERR_ASN1_INVALID_DATA -0x001C
#define POLARSSL_ERR_X509_FEATURE_UNAVAILABLE -0x0020
#define POLARSSL_ERR_X509_CERT_INVALID_PEM -0x0040
#define POLARSSL_ERR_X509_CERT_INVALID_FORMAT -0x0060
#define POLARSSL_ERR_X509_CERT_INVALID_VERSION -0x0080
#define POLARSSL_ERR_X509_CERT_INVALID_SERIAL -0x00A0
#define POLARSSL_ERR_X509_CERT_INVALID_ALG -0x00C0
#define POLARSSL_ERR_X509_CERT_INVALID_NAME -0x00E0
#define POLARSSL_ERR_X509_CERT_INVALID_DATE -0x0100
#define POLARSSL_ERR_X509_CERT_INVALID_PUBKEY -0x0120
#define POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE -0x0140
#define POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS -0x0160
#define POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION -0x0180
#define POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG -0x01A0
#define POLARSSL_ERR_X509_CERT_UNKNOWN_PK_ALG -0x01C0
#define POLARSSL_ERR_X509_CERT_SIG_MISMATCH -0x01E0
#define POLARSSL_ERR_X509_CERT_VERIFY_FAILED -0x0200
#define POLARSSL_ERR_X509_KEY_INVALID_PEM -0x0220
#define POLARSSL_ERR_X509_KEY_INVALID_VERSION -0x0240
#define POLARSSL_ERR_X509_KEY_INVALID_FORMAT -0x0260
#define POLARSSL_ERR_X509_KEY_INVALID_ENC_IV -0x0280
#define POLARSSL_ERR_X509_KEY_UNKNOWN_ENC_ALG -0x02A0
#define POLARSSL_ERR_X509_KEY_PASSWORD_REQUIRED -0x02C0
#define POLARSSL_ERR_X509_KEY_PASSWORD_MISMATCH -0x02E0
#define POLARSSL_ERR_X509_POINT_ERROR -0x0300
#define POLARSSL_ERR_X509_VALUE_TO_LENGTH -0x0320
#define BADCERT_EXPIRED 1
#define BADCERT_REVOKED 2
#define BADCERT_CN_MISMATCH 4
#define BADCERT_NOT_TRUSTED 8
#define BADCRL_NOT_TRUSTED 16
#define BADCRL_EXPIRED 32
/*
* DER constants
*/
#define ASN1_BOOLEAN 0x01
#define ASN1_INTEGER 0x02
#define ASN1_BIT_STRING 0x03
#define ASN1_OCTET_STRING 0x04
#define ASN1_NULL 0x05
#define ASN1_OID 0x06
#define ASN1_UTF8_STRING 0x0C
#define ASN1_SEQUENCE 0x10
#define ASN1_SET 0x11
#define ASN1_PRINTABLE_STRING 0x13
#define ASN1_T61_STRING 0x14
#define ASN1_IA5_STRING 0x16
#define ASN1_UTC_TIME 0x17
#define ASN1_UNIVERSAL_STRING 0x1C
#define ASN1_BMP_STRING 0x1E
#define ASN1_PRIMITIVE 0x00
#define ASN1_CONSTRUCTED 0x20
#define ASN1_CONTEXT_SPECIFIC 0x80
/*
* 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 "\x55\x04\x03"
#define OID_PKCS1 "\x2A\x86\x48\x86\xF7\x0D\x01\x01"
#define OID_PKCS1_RSA "\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01"
#define OID_PKCS1_RSA_SHA "\x2A\x86\x48\x86\xF7\x0D\x01\x01\x05"
#define OID_PKCS9 "\x2A\x86\x48\x86\xF7\x0D\x01\x09"
#define OID_PKCS9_EMAIL "\x2A\x86\x48\x86\xF7\x0D\x01\x09\x01"
/*
* Structures for parsing X.509 certificates
*/
typedef struct _x509_buf
{
int tag;
int len;
unsigned char *p;
}
x509_buf;
typedef struct _x509_name
{
x509_buf oid;
x509_buf val;
struct _x509_name *next;
}
x509_name;
typedef struct _x509_time
{
int year, mon, day;
int hour, min, sec;
}
x509_time;
typedef struct _x509_cert
{
x509_buf raw;
x509_buf tbs;
int version;
x509_buf serial;
x509_buf sig_oid1;
x509_buf issuer_raw;
x509_buf subject_raw;
x509_name issuer;
x509_name subject;
x509_time valid_from;
x509_time valid_to;
x509_buf pk_oid;
rsa_context rsa;
x509_buf issuer_id;
x509_buf subject_id;
x509_buf v3_ext;
int ca_istrue;
int max_pathlen;
x509_buf sig_oid2;
x509_buf sig;
struct _x509_cert *next;
}
x509_cert;
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;
typedef struct _x509_crl
{
x509_buf raw;
x509_buf tbs;
int version;
x509_buf sig_oid1;
x509_buf issuer_raw;
x509_name issuer;
x509_time this_update;
x509_time next_update;
x509_crl_entry entry;
x509_buf crl_ext;
x509_buf sig_oid2;
x509_buf sig;
struct _x509_crl *next;
}
x509_crl;
/*
* Structures for writing X.509 certificates
*/
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
/**
* \brief Parse one or more certificates and add them
* to the chained list
*
* \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 successful, or a specific X509 error code
*/
int x509parse_crt( x509_cert *chain, unsigned char *buf, int buflen );
/**
* \brief Load one or more certificates and add them
* to the chained list
*
* \param chain points to the start of the chain
* \param path filename to read the certificates from
*
* \return 0 if successful, or a specific X509 error code
*/
int x509parse_crtfile( x509_cert *chain, char *path );
/**
* \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 error code
*/
int x509parse_crl( x509_crl *chain, unsigned char *buf, int buflen );
/**
* \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 error code
*/
int x509parse_crlfile( x509_crl *chain, char *path );
/**
* \brief Parse a private RSA key
*
* \param rsa RSA context to be initialized
* \param buf input buffer
* \param buflen size of the buffer
* \param pwd password for decryption (optional)
* \param pwdlen size of the password
*
* \return 0 if successful, or a specific X509 error code
*/
int x509parse_key( rsa_context *rsa,
unsigned char *buf, int buflen,
unsigned char *pwd, int pwdlen );
/**
* \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 pwd password to decrypt the file (can be NULL)
*
* \return 0 if successful, or a specific X509 error code
*/
int x509parse_keyfile( rsa_context *rsa, char *path, char *password );
/**
* \brief Store the certificate DN in printable form into buf;
* no more than size characters will be written.
*/
int x509parse_dn_gets( char *buf, size_t size, x509_name *dn );
/**
* \brief Returns an informational string about the
* certificate.
*/
int x509parse_cert_info( char *buf, size_t size, char *prefix, x509_cert *crt );
/**
* \brief Returns an informational string about the
* CRL.
*/
int x509parse_crl_info( char *buf, size_t size, char *prefix, x509_crl *crl );
/**
* \brief Return 0 if the x509_time is still valid,
* or 1 otherwise.
*/
int x509parse_time_expired( x509_time *time );
/**
* \brief Verify the certificate signature
*
* \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
*
* \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
*
* \note TODO: add two arguments, depth and crl
*/
int x509parse_verify( x509_cert *crt,
x509_cert *trust_ca,
x509_crl *ca_crl,
char *cn, int *flags );
/**
* \brief Unallocate all certificate data
*/
void x509_free( x509_cert *crt );
/**
* \brief Unallocate all CRL data
*/
void x509_crl_free( x509_crl *crl );
/**
* \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 */