crypto/rsa/rsa_asn1.c

   1 /*
   2  * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 /*
  11  * RSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <stdio.h>
  17 #include "internal/cryptlib.h"
  18 #include <openssl/bn.h>
  19 #include <openssl/x509.h>
  20 #include <openssl/asn1t.h>
  21 #include "rsa_local.h"
  22
  23 /*
  24  * Override the default free and new methods,
  25  * and calculate helper products for multi-prime
  26  * RSA keys.
  27  */
  28 static int rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  29                   void *exarg)
  30 {
  31     if (operation == ASN1_OP_NEW_PRE) {
  32         *pval = (ASN1_VALUE *)RSA_new();
  33         if (*pval != NULL)
  34             return 2;
  35         return 0;
  36     } else if (operation == ASN1_OP_FREE_PRE) {
  37         RSA_free((RSA *)*pval);
  38         *pval = NULL;
  39         return 2;
  40     } else if (operation == ASN1_OP_D2I_POST) {
  41         if (((RSA *)*pval)->version != RSA_ASN1_VERSION_MULTI) {
  42             /* not a multi-prime key, skip */
  43             return 1;
  44         }
  45         return (ossl_rsa_multip_calc_product((RSA *)*pval) == 1) ? 2 : 0;
  46     }
  47     return 1;
  48 }
  49
  50 /* Based on definitions in RFC 8017 appendix A.1.2 */
  51 ASN1_SEQUENCE(RSA_PRIME_INFO) = {
  52         ASN1_SIMPLE(RSA_PRIME_INFO, r, CBIGNUM),
  53         ASN1_SIMPLE(RSA_PRIME_INFO, d, CBIGNUM),
  54         ASN1_SIMPLE(RSA_PRIME_INFO, t, CBIGNUM),
  55 } ASN1_SEQUENCE_END(RSA_PRIME_INFO)
  56
  57 ASN1_SEQUENCE_cb(RSAPrivateKey, rsa_cb) = {
  58         ASN1_EMBED(RSA, version, INT32),
  59         ASN1_SIMPLE(RSA, n, BIGNUM),
  60         ASN1_SIMPLE(RSA, e, BIGNUM),
  61         ASN1_SIMPLE(RSA, d, CBIGNUM),
  62         ASN1_SIMPLE(RSA, p, CBIGNUM),
  63         ASN1_SIMPLE(RSA, q, CBIGNUM),
  64         ASN1_SIMPLE(RSA, dmp1, CBIGNUM),
  65         ASN1_SIMPLE(RSA, dmq1, CBIGNUM),
  66         ASN1_SIMPLE(RSA, iqmp, CBIGNUM),
  67         ASN1_SEQUENCE_OF_OPT(RSA, prime_infos, RSA_PRIME_INFO)
  68 } ASN1_SEQUENCE_END_cb(RSA, RSAPrivateKey)
  69
  70
  71 ASN1_SEQUENCE_cb(RSAPublicKey, rsa_cb) = {
  72         ASN1_SIMPLE(RSA, n, BIGNUM),
  73         ASN1_SIMPLE(RSA, e, BIGNUM),
  74 } ASN1_SEQUENCE_END_cb(RSA, RSAPublicKey)
  75
  76 /* Free up maskHash */
  77 static int rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  78                       void *exarg)
  79 {
  80     if (operation == ASN1_OP_FREE_PRE) {
  81         RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval;
  82         X509_ALGOR_free(pss->maskHash);
  83     }
  84     return 1;
  85 }
  86
  87 ASN1_SEQUENCE_cb(RSA_PSS_PARAMS, rsa_pss_cb) = {
  88         ASN1_EXP_OPT(RSA_PSS_PARAMS, hashAlgorithm, X509_ALGOR,0),
  89         ASN1_EXP_OPT(RSA_PSS_PARAMS, maskGenAlgorithm, X509_ALGOR,1),
  90         ASN1_EXP_OPT(RSA_PSS_PARAMS, saltLength, ASN1_INTEGER,2),
  91         ASN1_EXP_OPT(RSA_PSS_PARAMS, trailerField, ASN1_INTEGER,3)
  92 } ASN1_SEQUENCE_END_cb(RSA_PSS_PARAMS, RSA_PSS_PARAMS)
  93
  94 IMPLEMENT_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
  95 IMPLEMENT_ASN1_DUP_FUNCTION(RSA_PSS_PARAMS)
  96
  97 /* Free up maskHash */
  98 static int rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  99                        void *exarg)
 100 {
 101     if (operation == ASN1_OP_FREE_PRE) {
 102         RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval;
 103         X509_ALGOR_free(oaep->maskHash);
 104     }
 105     return 1;
 106 }
 107
 108 ASN1_SEQUENCE_cb(RSA_OAEP_PARAMS, rsa_oaep_cb) = {
 109         ASN1_EXP_OPT(RSA_OAEP_PARAMS, hashFunc, X509_ALGOR, 0),
 110         ASN1_EXP_OPT(RSA_OAEP_PARAMS, maskGenFunc, X509_ALGOR, 1),
 111         ASN1_EXP_OPT(RSA_OAEP_PARAMS, pSourceFunc, X509_ALGOR, 2),
 112 } ASN1_SEQUENCE_END_cb(RSA_OAEP_PARAMS, RSA_OAEP_PARAMS)
 113
 114 IMPLEMENT_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
 115
 116 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPrivateKey, RSAPrivateKey)
 117
 118 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPublicKey, RSAPublicKey)
 119
 120 RSA *RSAPublicKey_dup(const RSA *rsa)
 121 {
 122     return ASN1_item_dup(ASN1_ITEM_rptr(RSAPublicKey), rsa);
 123 }
 124
 125 RSA *RSAPrivateKey_dup(const RSA *rsa)
 126 {
 127     return ASN1_item_dup(ASN1_ITEM_rptr(RSAPrivateKey), rsa);
 128 }