git.zerfleddert.de Git - proxmark3-svn/blob - common/mbedtls/x509.h

   1 /**
   2  * \file x509.h
   3  *
   4  * \brief X.509 generic defines and structures
   5  */
   6 /*
   7  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   8  *  SPDX-License-Identifier: GPL-2.0
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  *
  24  *  This file is part of mbed TLS (https://tls.mbed.org)
  25  */
  26 #ifndef MBEDTLS_X509_H
  27 #define MBEDTLS_X509_H
  28
  29 #if !defined(MBEDTLS_CONFIG_FILE)
  30 #include "config.h"
  31 #else
  32 #include MBEDTLS_CONFIG_FILE
  33 #endif
  34
  35 #include "asn1.h"
  36 #include "pk.h"
  37
  38 #if defined(MBEDTLS_RSA_C)
  39 #include "rsa.h"
  40 #endif
  41
  42 /**
  43  * \addtogroup x509_module
  44  * \{
  45  */
  46
  47 #if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA)
  48 /**
  49  * Maximum number of intermediate CAs in a verification chain.
  50  * That is, maximum length of the chain, excluding the end-entity certificate
  51  * and the trusted root certificate.
  52  *
  53  * Set this to a low value to prevent an adversary from making you waste
  54  * resources verifying an overlong certificate chain.
  55  */
  56 #define MBEDTLS_X509_MAX_INTERMEDIATE_CA   8
  57 #endif
  58
  59 /**
  60  * \name X509 Error codes
  61  * \{
  62  */
  63 #define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE              -0x2080  /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
  64 #define MBEDTLS_ERR_X509_UNKNOWN_OID                      -0x2100  /**< Requested OID is unknown. */
  65 #define MBEDTLS_ERR_X509_INVALID_FORMAT                   -0x2180  /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
  66 #define MBEDTLS_ERR_X509_INVALID_VERSION                  -0x2200  /**< The CRT/CRL/CSR version element is invalid. */
  67 #define MBEDTLS_ERR_X509_INVALID_SERIAL                   -0x2280  /**< The serial tag or value is invalid. */
  68 #define MBEDTLS_ERR_X509_INVALID_ALG                      -0x2300  /**< The algorithm tag or value is invalid. */
  69 #define MBEDTLS_ERR_X509_INVALID_NAME                     -0x2380  /**< The name tag or value is invalid. */
  70 #define MBEDTLS_ERR_X509_INVALID_DATE                     -0x2400  /**< The date tag or value is invalid. */
  71 #define MBEDTLS_ERR_X509_INVALID_SIGNATURE                -0x2480  /**< The signature tag or value invalid. */
  72 #define MBEDTLS_ERR_X509_INVALID_EXTENSIONS               -0x2500  /**< The extension tag or value is invalid. */
  73 #define MBEDTLS_ERR_X509_UNKNOWN_VERSION                  -0x2580  /**< CRT/CRL/CSR has an unsupported version number. */
  74 #define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG                  -0x2600  /**< Signature algorithm (oid) is unsupported. */
  75 #define MBEDTLS_ERR_X509_SIG_MISMATCH                     -0x2680  /**< Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
  76 #define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED               -0x2700  /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
  77 #define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT              -0x2780  /**< Format not recognized as DER or PEM. */
  78 #define MBEDTLS_ERR_X509_BAD_INPUT_DATA                   -0x2800  /**< Input invalid. */
  79 #define MBEDTLS_ERR_X509_ALLOC_FAILED                     -0x2880  /**< Allocation of memory failed. */
  80 #define MBEDTLS_ERR_X509_FILE_IO_ERROR                    -0x2900  /**< Read/write of file failed. */
  81 #define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL                 -0x2980  /**< Destination buffer is too small. */
  82 #define MBEDTLS_ERR_X509_FATAL_ERROR                      -0x3000  /**< A fatal error occured, eg the chain is too long or the vrfy callback failed. */
  83 /* \} name */
  84
  85 /**
  86  * \name X509 Verify codes
  87  * \{
  88  */
  89 /* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */
  90 #define MBEDTLS_X509_BADCERT_EXPIRED             0x01  /**< The certificate validity has expired. */
  91 #define MBEDTLS_X509_BADCERT_REVOKED             0x02  /**< The certificate has been revoked (is on a CRL). */
  92 #define MBEDTLS_X509_BADCERT_CN_MISMATCH         0x04  /**< The certificate Common Name (CN) does not match with the expected CN. */
  93 #define MBEDTLS_X509_BADCERT_NOT_TRUSTED         0x08  /**< The certificate is not correctly signed by the trusted CA. */
  94 #define MBEDTLS_X509_BADCRL_NOT_TRUSTED          0x10  /**< The CRL is not correctly signed by the trusted CA. */
  95 #define MBEDTLS_X509_BADCRL_EXPIRED              0x20  /**< The CRL is expired. */
  96 #define MBEDTLS_X509_BADCERT_MISSING             0x40  /**< Certificate was missing. */
  97 #define MBEDTLS_X509_BADCERT_SKIP_VERIFY         0x80  /**< Certificate verification was skipped. */
  98 #define MBEDTLS_X509_BADCERT_OTHER             0x0100  /**< Other reason (can be used by verify callback) */
  99 #define MBEDTLS_X509_BADCERT_FUTURE            0x0200  /**< The certificate validity starts in the future. */
 100 #define MBEDTLS_X509_BADCRL_FUTURE             0x0400  /**< The CRL is from the future */
 101 #define MBEDTLS_X509_BADCERT_KEY_USAGE         0x0800  /**< Usage does not match the keyUsage extension. */
 102 #define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE     0x1000  /**< Usage does not match the extendedKeyUsage extension. */
 103 #define MBEDTLS_X509_BADCERT_NS_CERT_TYPE      0x2000  /**< Usage does not match the nsCertType extension. */
 104 #define MBEDTLS_X509_BADCERT_BAD_MD            0x4000  /**< The certificate is signed with an unacceptable hash. */
 105 #define MBEDTLS_X509_BADCERT_BAD_PK            0x8000  /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
 106 #define MBEDTLS_X509_BADCERT_BAD_KEY         0x010000  /**< The certificate is signed with an unacceptable key (eg bad curve, RSA too short). */
 107 #define MBEDTLS_X509_BADCRL_BAD_MD           0x020000  /**< The CRL is signed with an unacceptable hash. */
 108 #define MBEDTLS_X509_BADCRL_BAD_PK           0x040000  /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */
 109 #define MBEDTLS_X509_BADCRL_BAD_KEY          0x080000  /**< The CRL is signed with an unacceptable key (eg bad curve, RSA too short). */
 110
 111 /* \} name */
 112 /* \} addtogroup x509_module */
 113
 114 /*
 115  * X.509 v3 Key Usage Extension flags
 116  * Reminder: update x509_info_key_usage() when adding new flags.
 117  */
 118 #define MBEDTLS_X509_KU_DIGITAL_SIGNATURE            (0x80)  /* bit 0 */
 119 #define MBEDTLS_X509_KU_NON_REPUDIATION              (0x40)  /* bit 1 */
 120 #define MBEDTLS_X509_KU_KEY_ENCIPHERMENT             (0x20)  /* bit 2 */
 121 #define MBEDTLS_X509_KU_DATA_ENCIPHERMENT            (0x10)  /* bit 3 */
 122 #define MBEDTLS_X509_KU_KEY_AGREEMENT                (0x08)  /* bit 4 */
 123 #define MBEDTLS_X509_KU_KEY_CERT_SIGN                (0x04)  /* bit 5 */
 124 #define MBEDTLS_X509_KU_CRL_SIGN                     (0x02)  /* bit 6 */
 125 #define MBEDTLS_X509_KU_ENCIPHER_ONLY                (0x01)  /* bit 7 */
 126 #define MBEDTLS_X509_KU_DECIPHER_ONLY              (0x8000)  /* bit 8 */
 127
 128 /*
 129  * Netscape certificate types
 130  * (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html)
 131  */
 132
 133 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT         (0x80)  /* bit 0 */
 134 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER         (0x40)  /* bit 1 */
 135 #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL              (0x20)  /* bit 2 */
 136 #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING     (0x10)  /* bit 3 */
 137 #define MBEDTLS_X509_NS_CERT_TYPE_RESERVED           (0x08)  /* bit 4 */
 138 #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA             (0x04)  /* bit 5 */
 139 #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA           (0x02)  /* bit 6 */
 140 #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA  (0x01)  /* bit 7 */
 141
 142 /*
 143  * X.509 extension types
 144  *
 145  * Comments refer to the status for using certificates. Status can be
 146  * different for writing certificates or reading CRLs or CSRs.
 147  */
 148 #define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER    (1 << 0)
 149 #define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER      (1 << 1)
 150 #define MBEDTLS_X509_EXT_KEY_USAGE                   (1 << 2)
 151 #define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES        (1 << 3)
 152 #define MBEDTLS_X509_EXT_POLICY_MAPPINGS             (1 << 4)
 153 #define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME            (1 << 5)    /* Supported (DNS) */
 154 #define MBEDTLS_X509_EXT_ISSUER_ALT_NAME             (1 << 6)
 155 #define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS     (1 << 7)
 156 #define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS           (1 << 8)    /* Supported */
 157 #define MBEDTLS_X509_EXT_NAME_CONSTRAINTS            (1 << 9)
 158 #define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS          (1 << 10)
 159 #define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE          (1 << 11)
 160 #define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS     (1 << 12)
 161 #define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY          (1 << 13)
 162 #define MBEDTLS_X509_EXT_FRESHEST_CRL                (1 << 14)
 163
 164 #define MBEDTLS_X509_EXT_NS_CERT_TYPE                (1 << 16)
 165
 166 /*
 167  * Storage format identifiers
 168  * Recognized formats: PEM and DER
 169  */
 170 #define MBEDTLS_X509_FORMAT_DER                 1
 171 #define MBEDTLS_X509_FORMAT_PEM                 2
 172
 173 #define MBEDTLS_X509_MAX_DN_NAME_SIZE         256 /**< Maximum value size of a DN entry */
 174
 175 #ifdef __cplusplus
 176 extern "C" {
 177 #endif
 178
 179 /**
 180  * \addtogroup x509_module
 181  * \{ */
 182
 183 /**
 184  * \name Structures for parsing X.509 certificates, CRLs and CSRs
 185  * \{
 186  */
 187
 188 /**
 189  * Type-length-value structure that allows for ASN1 using DER.
 190  */
 191 typedef mbedtls_asn1_buf mbedtls_x509_buf;
 192
 193 /**
 194  * Container for ASN1 bit strings.
 195  */
 196 typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring;
 197
 198 /**
 199  * Container for ASN1 named information objects.
 200  * It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.).
 201  */
 202 typedef mbedtls_asn1_named_data mbedtls_x509_name;
 203
 204 /**
 205  * Container for a sequence of ASN.1 items
 206  */
 207 typedef mbedtls_asn1_sequence mbedtls_x509_sequence;
 208
 209 /** Container for date and time (precision in seconds). */
 210 typedef struct mbedtls_x509_time
 211 {
 212     int year, mon, day;         /**< Date. */
 213     int hour, min, sec;         /**< Time. */
 214 }
 215 mbedtls_x509_time;
 216
 217 /** \} name Structures for parsing X.509 certificates, CRLs and CSRs */
 218 /** \} addtogroup x509_module */
 219
 220 /**
 221  * \brief          Store the certificate DN in printable form into buf;
 222  *                 no more than size characters will be written.
 223  *
 224  * \param buf      Buffer to write to
 225  * \param size     Maximum size of buffer
 226  * \param dn       The X509 name to represent
 227  *
 228  * \return         The length of the string written (not including the
 229  *                 terminated nul byte), or a negative error code.
 230  */
 231 int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn );
 232
 233 /**
 234  * \brief          Store the certificate serial in printable form into buf;
 235  *                 no more than size characters will be written.
 236  *
 237  * \param buf      Buffer to write to
 238  * \param size     Maximum size of buffer
 239  * \param serial   The X509 serial to represent
 240  *
 241  * \return         The length of the string written (not including the
 242  *                 terminated nul byte), or a negative error code.
 243  */
 244 int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial );
 245
 246 /**
 247  * \brief          Check a given mbedtls_x509_time against the system time
 248  *                 and tell if it's in the past.
 249  *
 250  * \note           Intended usage is "if( is_past( valid_to ) ) ERROR".
 251  *                 Hence the return value of 1 if on internal errors.
 252  *
 253  * \param to       mbedtls_x509_time to check
 254  *
 255  * \return         1 if the given time is in the past or an error occured,
 256  *                 0 otherwise.
 257  */
 258 int mbedtls_x509_time_is_past( const mbedtls_x509_time *to );
 259
 260 /**
 261  * \brief          Check a given mbedtls_x509_time against the system time
 262  *                 and tell if it's in the future.
 263  *
 264  * \note           Intended usage is "if( is_future( valid_from ) ) ERROR".
 265  *                 Hence the return value of 1 if on internal errors.
 266  *
 267  * \param from     mbedtls_x509_time to check
 268  *
 269  * \return         1 if the given time is in the future or an error occured,
 270  *                 0 otherwise.
 271  */
 272 int mbedtls_x509_time_is_future( const mbedtls_x509_time *from );
 273
 274 /**
 275  * \brief          Checkup routine
 276  *
 277  * \return         0 if successful, or 1 if the test failed
 278  */
 279 int mbedtls_x509_self_test( int verbose );
 280
 281 /*
 282  * Internal module functions. You probably do not want to use these unless you
 283  * know you do.
 284  */
 285 int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end,
 286                    mbedtls_x509_name *cur );
 287 int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end,
 288                        mbedtls_x509_buf *alg );
 289 int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end,
 290                   mbedtls_x509_buf *alg, mbedtls_x509_buf *params );
 291 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
 292 int mbedtls_x509_get_rsassa_pss_params( const mbedtls_x509_buf *params,
 293                                 mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md,
 294                                 int *salt_len );
 295 #endif
 296 int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig );
 297 int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params,
 298                       mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg,
 299                       void **sig_opts );
 300 int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end,
 301                    mbedtls_x509_time *t );
 302 int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
 303                      mbedtls_x509_buf *serial );
 304 int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
 305                   mbedtls_x509_buf *ext, int tag );
 306 int mbedtls_x509_sig_alg_gets( char *buf, size_t size, const mbedtls_x509_buf *sig_oid,
 307                        mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
 308                        const void *sig_opts );
 309 int mbedtls_x509_key_size_helper( char *buf, size_t buf_size, const char *name );
 310 int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name );
 311 int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len,
 312                         int critical, const unsigned char *val,
 313                         size_t val_len );
 314 int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start,
 315                            mbedtls_asn1_named_data *first );
 316 int mbedtls_x509_write_names( unsigned char **p, unsigned char *start,
 317                       mbedtls_asn1_named_data *first );
 318 int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
 319                     const char *oid, size_t oid_len,
 320                     unsigned char *sig, size_t size );
 321
 322 #define MBEDTLS_X509_SAFE_SNPRINTF                          \
 323     do {                                                    \
 324         if( ret < 0 || (size_t) ret >= n )                  \
 325             return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL );    \
 326                                                             \
 327         n -= (size_t) ret;                                  \
 328         p += (size_t) ret;                                  \
 329     } while( 0 )
 330
 331 #ifdef __cplusplus
 332 }
 333 #endif
 334
 335 #endif /* x509.h */