crypto/rsa/rsa_asn1.c

   1 /*
   2  * Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/bn.h>
  13 #include <openssl/x509.h>
  14 #include <openssl/asn1t.h>
  15 #include "rsa_locl.h"
  16
  17 /*
  18  * Override the default free and new methods,
  19  * and calculate helper products for multi-prime
  20  * RSA keys.
  21  */
  22 static int rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  23                   void *exarg)
  24 {
  25     if (operation == ASN1_OP_NEW_PRE) {
  26         *pval = (ASN1_VALUE *)RSA_new();
  27         if (*pval != NULL)
  28             return 2;
  29         return 0;
  30     } else if (operation == ASN1_OP_FREE_PRE) {
  31         RSA_free((RSA *)*pval);
  32         *pval = NULL;
  33         return 2;
  34     } else if (operation == ASN1_OP_D2I_POST) {
  35         if (((RSA *)*pval)->version != RSA_ASN1_VERSION_MULTI) {
  36             /* not a multi-prime key, skip */
  37             return 1;
  38         }
  39         return (rsa_multip_calc_product((RSA *)*pval) == 1) ? 2 : 0;
  40     }
  41     return 1;
  42 }
  43
  44 /* Based on definitions in RFC 8017 appendix A.1.2 */
  45 ASN1_SEQUENCE(RSA_PRIME_INFO) = {
  46         ASN1_SIMPLE(RSA_PRIME_INFO, r, CBIGNUM),
  47         ASN1_SIMPLE(RSA_PRIME_INFO, d, CBIGNUM),
  48         ASN1_SIMPLE(RSA_PRIME_INFO, t, CBIGNUM),
  49 } ASN1_SEQUENCE_END(RSA_PRIME_INFO)
  50
  51 ASN1_SEQUENCE_cb(RSAPrivateKey, rsa_cb) = {
  52         ASN1_EMBED(RSA, version, INT32),
  53         ASN1_SIMPLE(RSA, n, BIGNUM),
  54         ASN1_SIMPLE(RSA, e, BIGNUM),
  55         ASN1_SIMPLE(RSA, d, CBIGNUM),
  56         ASN1_SIMPLE(RSA, p, CBIGNUM),
  57         ASN1_SIMPLE(RSA, q, CBIGNUM),
  58         ASN1_SIMPLE(RSA, dmp1, CBIGNUM),
  59         ASN1_SIMPLE(RSA, dmq1, CBIGNUM),
  60         ASN1_SIMPLE(RSA, iqmp, CBIGNUM),
  61         ASN1_SEQUENCE_OF_OPT(RSA, prime_infos, RSA_PRIME_INFO)
  62 } ASN1_SEQUENCE_END_cb(RSA, RSAPrivateKey)
  63
  64
  65 ASN1_SEQUENCE_cb(RSAPublicKey, rsa_cb) = {
  66         ASN1_SIMPLE(RSA, n, BIGNUM),
  67         ASN1_SIMPLE(RSA, e, BIGNUM),
  68 } ASN1_SEQUENCE_END_cb(RSA, RSAPublicKey)
  69
  70 /* Free up maskHash */
  71 static int rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  72                       void *exarg)
  73 {
  74     if (operation == ASN1_OP_FREE_PRE) {
  75         RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval;
  76         X509_ALGOR_free(pss->maskHash);
  77     }
  78     return 1;
  79 }
  80
  81 ASN1_SEQUENCE_cb(RSA_PSS_PARAMS, rsa_pss_cb) = {
  82         ASN1_EXP_OPT(RSA_PSS_PARAMS, hashAlgorithm, X509_ALGOR,0),
  83         ASN1_EXP_OPT(RSA_PSS_PARAMS, maskGenAlgorithm, X509_ALGOR,1),
  84         ASN1_EXP_OPT(RSA_PSS_PARAMS, saltLength, ASN1_INTEGER,2),
  85         ASN1_EXP_OPT(RSA_PSS_PARAMS, trailerField, ASN1_INTEGER,3)
  86 } ASN1_SEQUENCE_END_cb(RSA_PSS_PARAMS, RSA_PSS_PARAMS)
  87
  88 IMPLEMENT_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
  89
  90 /* Free up maskHash */
  91 static int rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  92                        void *exarg)
  93 {
  94     if (operation == ASN1_OP_FREE_PRE) {
  95         RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval;
  96         X509_ALGOR_free(oaep->maskHash);
  97     }
  98     return 1;
  99 }
 100
 101 ASN1_SEQUENCE_cb(RSA_OAEP_PARAMS, rsa_oaep_cb) = {
 102         ASN1_EXP_OPT(RSA_OAEP_PARAMS, hashFunc, X509_ALGOR, 0),
 103         ASN1_EXP_OPT(RSA_OAEP_PARAMS, maskGenFunc, X509_ALGOR, 1),
 104         ASN1_EXP_OPT(RSA_OAEP_PARAMS, pSourceFunc, X509_ALGOR, 2),
 105 } ASN1_SEQUENCE_END_cb(RSA_OAEP_PARAMS, RSA_OAEP_PARAMS)
 106
 107 IMPLEMENT_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
 108
 109 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(RSA, RSAPrivateKey, RSAPrivateKey)
 110
 111 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(RSA, RSAPublicKey, RSAPublicKey)
 112
 113 RSA *RSAPublicKey_dup(RSA *rsa)
 114 {
 115     return ASN1_item_dup(ASN1_ITEM_rptr(RSAPublicKey), rsa);
 116 }
 117
 118 RSA *RSAPrivateKey_dup(RSA *rsa)
 119 {
 120     return ASN1_item_dup(ASN1_ITEM_rptr(RSAPrivateKey), rsa);
 121 }