| /** |
| * \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 (http://www.polarssl.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. */ |
| /* \} 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) */ |
| #define BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */ |
| #define BADCRL_FUTURE 0x0400 /**< The CRL is from the future */ |
| /* \} 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 ); |
| |
| /** |
| * \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 ); |
| |
| /** |
| * \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 ); |
| |
| /** |
| * \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 */ |
