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d0e755716f
mbedtls/include/polarssl/x509.h
Manuel Pégourié-Gonnard d0e755716f Only return VERIFY_FAILED from a single point 
Everything else is a fatal error. Also improve documentation about that for
the vrfy callback.
2017-07-28 13:15:57 +01:00

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/**
* \file x509.h
*
* \brief X.509 generic defines and structures
*
* Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
*
* This file is part of mbed TLS (https://tls.mbed.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
#if !defined(POLARSSL_CONFIG_FILE)
#include "config.h"
#else
#include POLARSSL_CONFIG_FILE
#endif
#include "asn1.h"
#include "pk.h"
#if defined(POLARSSL_RSA_C)
#include "rsa.h"
#endif
/**
* \addtogroup x509_module
* \{
*/
#if !defined(POLARSSL_X509_MAX_INTERMEDIATE_CA)
/**
* Maximum number of intermediate CAs in a verification chain.
* That is, maximum length of the chain, excluding the end-entity certificate
* and the trusted root certificate.
*
* Set this to a low value to prevent an adversary from making you waste
* resources verifying an overlong certificate chain.
*/
#define POLARSSL_X509_MAX_INTERMEDIATE_CA 8
#endif
/**
* \name X509 Error codes
* \{
*/
#define POLARSSL_ERR_X509_FEATURE_UNAVAILABLE -0x2080 /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
#define POLARSSL_ERR_X509_UNKNOWN_OID -0x2100 /**< Requested OID is unknown. */
#define POLARSSL_ERR_X509_INVALID_FORMAT -0x2180 /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
#define POLARSSL_ERR_X509_INVALID_VERSION -0x2200 /**< The CRT/CRL/CSR version element is invalid. */
#define POLARSSL_ERR_X509_INVALID_SERIAL -0x2280 /**< The serial tag or value is invalid. */
#define POLARSSL_ERR_X509_INVALID_ALG -0x2300 /**< The algorithm tag or value is invalid. */
#define POLARSSL_ERR_X509_INVALID_NAME -0x2380 /**< The name tag or value is invalid. */
#define POLARSSL_ERR_X509_INVALID_DATE -0x2400 /**< The date tag or value is invalid. */
#define POLARSSL_ERR_X509_INVALID_SIGNATURE -0x2480 /**< The signature tag or value invalid. */
#define POLARSSL_ERR_X509_INVALID_EXTENSIONS -0x2500 /**< The extension tag or value is invalid. */
#define POLARSSL_ERR_X509_UNKNOWN_VERSION -0x2580 /**< CRT/CRL/CSR has an unsupported version number. */
#define POLARSSL_ERR_X509_UNKNOWN_SIG_ALG -0x2600 /**< Signature algorithm (oid) is unsupported. */
#define POLARSSL_ERR_X509_SIG_MISMATCH -0x2680 /**< Signature algorithms do not match. (see \c ::x509_crt sig_oid) */
#define POLARSSL_ERR_X509_CERT_VERIFY_FAILED -0x2700 /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
#define POLARSSL_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 /**< Format not recognized as DER or PEM. */
#define POLARSSL_ERR_X509_BAD_INPUT_DATA -0x2800 /**< Input invalid. */
#define POLARSSL_ERR_X509_MALLOC_FAILED -0x2880 /**< Allocation of memory failed. */
#define POLARSSL_ERR_X509_FILE_IO_ERROR -0x2900 /**< Read/write of file failed. */
#define POLARSSL_ERR_X509_FATAL_ERROR -0x3000 /**< A fatal error occured, eg the chain is too long or the vrfy callback failed. */
/* \} name */
/**
* \name X509 Verify codes
* \{
*/
/* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
#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 /**< The CRL is not correctly signed by the trusted CA. */
#define BADCRL_EXPIRED 0x20 /**< The 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) */
#define BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */
#define BADCRL_FUTURE 0x0400 /**< The CRL is from the future */
#define BADCERT_KEY_USAGE 0x0800 /**< Usage does not match the keyUsage extension. */
#define BADCERT_EXT_KEY_USAGE 0x1000 /**< Usage does not match the extendedKeyUsage extension. */
#define BADCERT_NS_CERT_TYPE 0x2000 /**< Usage does not match the nsCertType extension. */
#define BADCERT_BAD_KEY 0x10000 /**< Bad key (e.g. unsupported elliptic curve in use) */
/* \} name */
/* \} addtogroup x509_module */
/*
* 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 */
/*
* 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 */
/*
* X.509 extension types
*
* Comments refer to the status for using certificates. Status can be
* different for writing certificates or reading CRLs or CSRs.
*/
#define EXT_AUTHORITY_KEY_IDENTIFIER (1 << 0)
#define EXT_SUBJECT_KEY_IDENTIFIER (1 << 1)
#define EXT_KEY_USAGE (1 << 2) /* Parsed but not used */
#define EXT_CERTIFICATE_POLICIES (1 << 3)
#define EXT_POLICY_MAPPINGS (1 << 4)
#define EXT_SUBJECT_ALT_NAME (1 << 5) /* Supported (DNS) */
#define EXT_ISSUER_ALT_NAME (1 << 6)
#define EXT_SUBJECT_DIRECTORY_ATTRS (1 << 7)
#define EXT_BASIC_CONSTRAINTS (1 << 8) /* Supported */
#define EXT_NAME_CONSTRAINTS (1 << 9)
#define EXT_POLICY_CONSTRAINTS (1 << 10)
#define EXT_EXTENDED_KEY_USAGE (1 << 11) /* Parsed but not used */
#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) /* Parsed (and then ?) */
/*
* Storage format identifiers
* Recognized formats: PEM and DER
*/
#define X509_FORMAT_DER 1
#define X509_FORMAT_PEM 2
#define X509_MAX_DN_NAME_SIZE 256 /**< Maximum value size of a DN entry */
#ifdef __cplusplus
extern "C" {
#endif
/**
* \addtogroup x509_module
* \{ */
/**
* \name Structures for parsing X.509 certificates, CRLs and CSRs
* \{
*/
/**
* 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 asn1_named_data 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;
/** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
/** \} addtogroup x509_module */
/**
* \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 x509_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 x509_serial_gets( char *buf, size_t size, const x509_buf *serial );
#if ! defined(POLARSSL_DEPRECATED_REMOVED)
#if defined(POLARSSL_DEPRECATED_WARNING)
#define DEPRECATED __attribute__((deprecated))
#else
#define DEPRECATED
#endif
/**
* \brief Give an known OID, return its descriptive string.
*
* \deprecated Use oid_get_extended_key_usage() instead.
*
* \warning Only works for extended_key_usage OIDs!
*
* \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 ) DEPRECATED;
/**
* \brief Give an OID, return a string version of its OID number.
*
* \deprecated Use oid_get_numeric_string() instead.
*
* \param buf Buffer to write to
* \param size Maximum size of buffer
* \param oid Buffer containing the OID
*
* \return Length of the string written (excluding final NULL) or
* POLARSSL_ERR_OID_BUF_TO_SMALL in case of error
*/
int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid ) DEPRECATED;
#undef DEPRECATED
#endif /* POLARSSL_DEPRECATED_REMOVED */
/**
* \brief Check a given x509_time against the system time and check
* if it is not expired.
*
* \param time x509_time to check
*
* \return 0 if the x509_time is still valid,
* 1 otherwise.
*/
int x509_time_expired( const x509_time *time );
/**
* \brief Check a given x509_time against the system time and check
* if it is not from the future.
*
* \param time x509_time to check
*
* \return 0 if the x509_time is already valid,
* 1 otherwise.
*/
int x509_time_future( const x509_time *time );
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int x509_self_test( int verbose );
/*
* Internal module functions. You probably do not want to use these unless you
* know you do.
*/
int x509_get_name( unsigned char **p, const unsigned char *end,
x509_name *cur );
int x509_get_alg_null( unsigned char **p, const unsigned char *end,
x509_buf *alg );
int x509_get_alg( unsigned char **p, const unsigned char *end,
x509_buf *alg, x509_buf *params );
#if defined(POLARSSL_X509_RSASSA_PSS_SUPPORT)
int x509_get_rsassa_pss_params( const x509_buf *params,
md_type_t *md_alg, md_type_t *mgf_md,
int *salt_len );
#endif
int x509_get_sig( unsigned char **p, const unsigned char *end, x509_buf *sig );
int x509_get_sig_alg( const x509_buf *sig_oid, const x509_buf *sig_params,
md_type_t *md_alg, pk_type_t *pk_alg,
void **sig_opts );
int x509_get_time( unsigned char **p, const unsigned char *end,
x509_time *time );
int x509_get_serial( unsigned char **p, const unsigned char *end,
x509_buf *serial );
int x509_get_ext( unsigned char **p, const unsigned char *end,
x509_buf *ext, int tag );
int x509_sig_alg_gets( char *buf, size_t size, const x509_buf *sig_oid,
pk_type_t pk_alg, md_type_t md_alg,
const void *sig_opts );
int x509_key_size_helper( char *buf, size_t size, const char *name );
int x509_string_to_names( asn1_named_data **head, const char *name );
int x509_set_extension( asn1_named_data **head, const char *oid, size_t oid_len,
int critical, const unsigned char *val,
size_t val_len );
int x509_write_extensions( unsigned char **p, unsigned char *start,
asn1_named_data *first );
int x509_write_names( unsigned char **p, unsigned char *start,
asn1_named_data *first );
int x509_write_sig( unsigned char **p, unsigned char *start,
const char *oid, size_t oid_len,
unsigned char *sig, size_t size );
#ifdef __cplusplus
}
#endif
#endif /* x509.h */
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