release/src/router/openssl/crypto/ecdsa/ecdsa.h

   1 /* crypto/ecdsa/ecdsa.h */
   2 /**
   3  * \file   crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions
   4  * \author Written by Nils Larsch for the OpenSSL project
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59 #ifndef HEADER_ECDSA_H
  60 # define HEADER_ECDSA_H
  61
  62 # include <openssl/opensslconf.h>
  63
  64 # ifdef OPENSSL_NO_ECDSA
  65 #  error ECDSA is disabled.
  66 # endif
  67
  68 # include <openssl/ec.h>
  69 # include <openssl/ossl_typ.h>
  70 # ifndef OPENSSL_NO_DEPRECATED
  71 #  include <openssl/bn.h>
  72 # endif
  73
  74 #ifdef __cplusplus
  75 extern "C" {
  76 #endif
  77
  78 typedef struct ECDSA_SIG_st {
  79     BIGNUM *r;
  80     BIGNUM *s;
  81 } ECDSA_SIG;
  82
  83 /** Allocates and initialize a ECDSA_SIG structure
  84  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
  85  */
  86 ECDSA_SIG *ECDSA_SIG_new(void);
  87
  88 /** frees a ECDSA_SIG structure
  89  *  \param  sig  pointer to the ECDSA_SIG structure
  90  */
  91 void ECDSA_SIG_free(ECDSA_SIG *sig);
  92
  93 /** DER encode content of ECDSA_SIG object (note: this function modifies *pp
  94  *  (*pp += length of the DER encoded signature)).
  95  *  \param  sig  pointer to the ECDSA_SIG object
  96  *  \param  pp   pointer to a unsigned char pointer for the output or NULL
  97  *  \return the length of the DER encoded ECDSA_SIG object or 0
  98  */
  99 int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
 100
 101 /** Decodes a DER encoded ECDSA signature (note: this function changes *pp
 102  *  (*pp += len)).
 103  *  \param  sig  pointer to ECDSA_SIG pointer (may be NULL)
 104  *  \param  pp   memory buffer with the DER encoded signature
 105  *  \param  len  length of the buffer
 106  *  \return pointer to the decoded ECDSA_SIG structure (or NULL)
 107  */
 108 ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
 109
 110 /** Computes the ECDSA signature of the given hash value using
 111  *  the supplied private key and returns the created signature.
 112  *  \param  dgst      pointer to the hash value
 113  *  \param  dgst_len  length of the hash value
 114  *  \param  eckey     EC_KEY object containing a private EC key
 115  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
 116  */
 117 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
 118                          EC_KEY *eckey);
 119
 120 /** Computes ECDSA signature of a given hash value using the supplied
 121  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
 122  *  \param  dgst     pointer to the hash value to sign
 123  *  \param  dgstlen  length of the hash value
 124  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
 125  *  \param  rp       BIGNUM with a pre-computed rp value (optioanl),
 126  *                   see ECDSA_sign_setup
 127  *  \param  eckey    EC_KEY object containing a private EC key
 128  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
 129  */
 130 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
 131                             const BIGNUM *kinv, const BIGNUM *rp,
 132                             EC_KEY *eckey);
 133
 134 /** Verifies that the supplied signature is a valid ECDSA
 135  *  signature of the supplied hash value using the supplied public key.
 136  *  \param  dgst      pointer to the hash value
 137  *  \param  dgst_len  length of the hash value
 138  *  \param  sig       ECDSA_SIG structure
 139  *  \param  eckey     EC_KEY object containing a public EC key
 140  *  \return 1 if the signature is valid, 0 if the signature is invalid
 141  *          and -1 on error
 142  */
 143 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
 144                     const ECDSA_SIG *sig, EC_KEY *eckey);
 145
 146 const ECDSA_METHOD *ECDSA_OpenSSL(void);
 147
 148 /** Sets the default ECDSA method
 149  *  \param  meth  new default ECDSA_METHOD
 150  */
 151 void ECDSA_set_default_method(const ECDSA_METHOD *meth);
 152
 153 /** Returns the default ECDSA method
 154  *  \return pointer to ECDSA_METHOD structure containing the default method
 155  */
 156 const ECDSA_METHOD *ECDSA_get_default_method(void);
 157
 158 /** Sets method to be used for the ECDSA operations
 159  *  \param  eckey  EC_KEY object
 160  *  \param  meth   new method
 161  *  \return 1 on success and 0 otherwise
 162  */
 163 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth);
 164
 165 /** Returns the maximum length of the DER encoded signature
 166  *  \param  eckey  EC_KEY object
 167  *  \return numbers of bytes required for the DER encoded signature
 168  */
 169 int ECDSA_size(const EC_KEY *eckey);
 170
 171 /** Precompute parts of the signing operation
 172  *  \param  eckey  EC_KEY object containing a private EC key
 173  *  \param  ctx    BN_CTX object (optional)
 174  *  \param  kinv   BIGNUM pointer for the inverse of k
 175  *  \param  rp     BIGNUM pointer for x coordinate of k * generator
 176  *  \return 1 on success and 0 otherwise
 177  */
 178 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);
 179
 180 /** Computes ECDSA signature of a given hash value using the supplied
 181  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
 182  *  \param  type     this parameter is ignored
 183  *  \param  dgst     pointer to the hash value to sign
 184  *  \param  dgstlen  length of the hash value
 185  *  \param  sig      memory for the DER encoded created signature
 186  *  \param  siglen   pointer to the length of the returned signature
 187  *  \param  eckey    EC_KEY object containing a private EC key
 188  *  \return 1 on success and 0 otherwise
 189  */
 190 int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
 191                unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
 192
 193 /** Computes ECDSA signature of a given hash value using the supplied
 194  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
 195  *  \param  type     this parameter is ignored
 196  *  \param  dgst     pointer to the hash value to sign
 197  *  \param  dgstlen  length of the hash value
 198  *  \param  sig      buffer to hold the DER encoded signature
 199  *  \param  siglen   pointer to the length of the returned signature
 200  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
 201  *  \param  rp       BIGNUM with a pre-computed rp value (optioanl),
 202  *                   see ECDSA_sign_setup
 203  *  \param  eckey    EC_KEY object containing a private EC key
 204  *  \return 1 on success and 0 otherwise
 205  */
 206 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
 207                   unsigned char *sig, unsigned int *siglen,
 208                   const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);
 209
 210 /** Verifies that the given signature is valid ECDSA signature
 211  *  of the supplied hash value using the specified public key.
 212  *  \param  type     this parameter is ignored
 213  *  \param  dgst     pointer to the hash value
 214  *  \param  dgstlen  length of the hash value
 215  *  \param  sig      pointer to the DER encoded signature
 216  *  \param  siglen   length of the DER encoded signature
 217  *  \param  eckey    EC_KEY object containing a public EC key
 218  *  \return 1 if the signature is valid, 0 if the signature is invalid
 219  *          and -1 on error
 220  */
 221 int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
 222                  const unsigned char *sig, int siglen, EC_KEY *eckey);
 223
 224 /* the standard ex_data functions */
 225 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new
 226                            *new_func, CRYPTO_EX_dup *dup_func,
 227                            CRYPTO_EX_free *free_func);
 228 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg);
 229 void *ECDSA_get_ex_data(EC_KEY *d, int idx);
 230
 231 /** Allocates and initialize a ECDSA_METHOD structure
 232  *  \param ecdsa_method pointer to ECDSA_METHOD to copy.  (May be NULL)
 233  *  \return pointer to a ECDSA_METHOD structure or NULL if an error occurred
 234  */
 235
 236 ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_method);
 237
 238 /** frees a ECDSA_METHOD structure
 239  *  \param  ecdsa_method  pointer to the ECDSA_METHOD structure
 240  */
 241 void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method);
 242
 243 /**  Sets application specific data in the ECDSA_METHOD
 244  *   \param  ecdsa_method pointer to existing ECDSA_METHOD
 245  *   \param  app application specific data to set
 246  */
 247
 248 void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app);
 249
 250 /** Returns application specific data from a ECDSA_METHOD structure
 251  *  \param ecdsa_method pointer to ECDSA_METHOD structure
 252  *  \return pointer to application specific data.
 253  */
 254
 255 void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method);
 256
 257 /**  Set the ECDSA_do_sign function in the ECDSA_METHOD
 258  *   \param  ecdsa_method  pointer to existing ECDSA_METHOD
 259  *   \param  ecdsa_do_sign a funtion of type ECDSA_do_sign
 260  */
 261
 262 void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
 263                            ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
 264                                                         *dgst, int dgst_len,
 265                                                         const BIGNUM *inv,
 266                                                         const BIGNUM *rp,
 267                                                         EC_KEY *eckey));
 268
 269 /**  Set the  ECDSA_sign_setup function in the ECDSA_METHOD
 270  *   \param  ecdsa_method  pointer to existing ECDSA_METHOD
 271  *   \param  ecdsa_sign_setup a funtion of type ECDSA_sign_setup
 272  */
 273
 274 void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
 275                                  int (*ecdsa_sign_setup) (EC_KEY *eckey,
 276                                                           BN_CTX *ctx,
 277                                                           BIGNUM **kinv,
 278                                                           BIGNUM **r));
 279
 280 /**  Set the ECDSA_do_verify function in the ECDSA_METHOD
 281  *   \param  ecdsa_method  pointer to existing ECDSA_METHOD
 282  *   \param  ecdsa_do_verify a funtion of type ECDSA_do_verify
 283  */
 284
 285 void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
 286                              int (*ecdsa_do_verify) (const unsigned char
 287                                                      *dgst, int dgst_len,
 288                                                      const ECDSA_SIG *sig,
 289                                                      EC_KEY *eckey));
 290
 291 void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags);
 292
 293 /**  Set the flags field in the ECDSA_METHOD
 294  *   \param  ecdsa_method  pointer to existing ECDSA_METHOD
 295  *   \param  flags flags value to set
 296  */
 297
 298 void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name);
 299
 300 /**  Set the name field in the ECDSA_METHOD
 301  *   \param  ecdsa_method  pointer to existing ECDSA_METHOD
 302  *   \param  name name to set
 303  */
 304
 305 /* BEGIN ERROR CODES */
 306 /*
 307  * The following lines are auto generated by the script mkerr.pl. Any changes
 308  * made after this point may be overwritten when the script is next run.
 309  */
 310 void ERR_load_ECDSA_strings(void);
 311
 312 /* Error codes for the ECDSA functions. */
 313
 314 /* Function codes. */
 315 # define ECDSA_F_ECDSA_CHECK                              104
 316 # define ECDSA_F_ECDSA_DATA_NEW_METHOD                    100
 317 # define ECDSA_F_ECDSA_DO_SIGN                            101
 318 # define ECDSA_F_ECDSA_DO_VERIFY                          102
 319 # define ECDSA_F_ECDSA_METHOD_NEW                         105
 320 # define ECDSA_F_ECDSA_SIGN_SETUP                         103
 321
 322 /* Reason codes. */
 323 # define ECDSA_R_BAD_SIGNATURE                            100
 324 # define ECDSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE              101
 325 # define ECDSA_R_ERR_EC_LIB                               102
 326 # define ECDSA_R_MISSING_PARAMETERS                       103
 327 # define ECDSA_R_NEED_NEW_SETUP_VALUES                    106
 328 # define ECDSA_R_NON_FIPS_METHOD                          107
 329 # define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED          104
 330 # define ECDSA_R_SIGNATURE_MALLOC_FAILED                  105
 331
 332 #ifdef  __cplusplus
 333 }
 334 #endif
 335 #endif