| 1 | /*
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| 2 | * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | * RSA low level APIs are deprecated for public use, but still ok for
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| 12 | * internal use.
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| 13 | */
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| 14 | #include "internal/deprecated.h"
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| 15 |
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| 16 | #include <stdio.h>
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| 17 | #include "internal/cryptlib.h"
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| 18 | #include <openssl/bn.h>
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| 19 | #include <openssl/x509.h>
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| 20 | #include <openssl/asn1t.h>
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| 21 | #include "rsa_local.h"
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| 22 |
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| 23 | /*
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| 24 | * Override the default free and new methods,
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| 25 | * and calculate helper products for multi-prime
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| 26 | * RSA keys.
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| 27 | */
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| 28 | static int rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 29 | void *exarg)
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| 30 | {
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| 31 | if (operation == ASN1_OP_NEW_PRE) {
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| 32 | *pval = (ASN1_VALUE *)RSA_new();
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| 33 | if (*pval != NULL)
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| 34 | return 2;
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| 35 | return 0;
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| 36 | } else if (operation == ASN1_OP_FREE_PRE) {
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| 37 | RSA_free((RSA *)*pval);
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| 38 | *pval = NULL;
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| 39 | return 2;
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| 40 | } else if (operation == ASN1_OP_D2I_POST) {
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| 41 | if (((RSA *)*pval)->version != RSA_ASN1_VERSION_MULTI) {
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| 42 | /* not a multi-prime key, skip */
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| 43 | return 1;
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| 44 | }
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| 45 | return (ossl_rsa_multip_calc_product((RSA *)*pval) == 1) ? 2 : 0;
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| 46 | }
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| 47 | return 1;
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| 48 | }
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| 49 |
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| 50 | /* Based on definitions in RFC 8017 appendix A.1.2 */
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| 51 | ASN1_SEQUENCE(RSA_PRIME_INFO) = {
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| 52 | ASN1_SIMPLE(RSA_PRIME_INFO, r, CBIGNUM),
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| 53 | ASN1_SIMPLE(RSA_PRIME_INFO, d, CBIGNUM),
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| 54 | ASN1_SIMPLE(RSA_PRIME_INFO, t, CBIGNUM),
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| 55 | } ASN1_SEQUENCE_END(RSA_PRIME_INFO)
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| 56 |
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| 57 | ASN1_SEQUENCE_cb(RSAPrivateKey, rsa_cb) = {
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| 58 | ASN1_EMBED(RSA, version, INT32),
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| 59 | ASN1_SIMPLE(RSA, n, BIGNUM),
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| 60 | ASN1_SIMPLE(RSA, e, BIGNUM),
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| 61 | ASN1_SIMPLE(RSA, d, CBIGNUM),
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| 62 | ASN1_SIMPLE(RSA, p, CBIGNUM),
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| 63 | ASN1_SIMPLE(RSA, q, CBIGNUM),
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| 64 | ASN1_SIMPLE(RSA, dmp1, CBIGNUM),
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| 65 | ASN1_SIMPLE(RSA, dmq1, CBIGNUM),
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| 66 | ASN1_SIMPLE(RSA, iqmp, CBIGNUM),
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| 67 | ASN1_SEQUENCE_OF_OPT(RSA, prime_infos, RSA_PRIME_INFO)
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| 68 | } ASN1_SEQUENCE_END_cb(RSA, RSAPrivateKey)
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| 69 |
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| 70 |
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| 71 | ASN1_SEQUENCE_cb(RSAPublicKey, rsa_cb) = {
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| 72 | ASN1_SIMPLE(RSA, n, BIGNUM),
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| 73 | ASN1_SIMPLE(RSA, e, BIGNUM),
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| 74 | } ASN1_SEQUENCE_END_cb(RSA, RSAPublicKey)
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| 75 |
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| 76 | /* Free up maskHash */
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| 77 | static int rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 78 | void *exarg)
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| 79 | {
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| 80 | if (operation == ASN1_OP_FREE_PRE) {
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| 81 | RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval;
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| 82 | X509_ALGOR_free(pss->maskHash);
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| 83 | }
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| 84 | return 1;
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| 85 | }
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| 86 |
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| 87 | ASN1_SEQUENCE_cb(RSA_PSS_PARAMS, rsa_pss_cb) = {
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| 88 | ASN1_EXP_OPT(RSA_PSS_PARAMS, hashAlgorithm, X509_ALGOR,0),
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| 89 | ASN1_EXP_OPT(RSA_PSS_PARAMS, maskGenAlgorithm, X509_ALGOR,1),
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| 90 | ASN1_EXP_OPT(RSA_PSS_PARAMS, saltLength, ASN1_INTEGER,2),
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| 91 | ASN1_EXP_OPT(RSA_PSS_PARAMS, trailerField, ASN1_INTEGER,3)
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| 92 | } ASN1_SEQUENCE_END_cb(RSA_PSS_PARAMS, RSA_PSS_PARAMS)
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| 93 |
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| 94 | IMPLEMENT_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
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| 95 | IMPLEMENT_ASN1_DUP_FUNCTION(RSA_PSS_PARAMS)
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| 96 |
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| 97 | /* Free up maskHash */
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| 98 | static int rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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| 99 | void *exarg)
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| 100 | {
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| 101 | if (operation == ASN1_OP_FREE_PRE) {
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| 102 | RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval;
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| 103 | X509_ALGOR_free(oaep->maskHash);
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| 104 | }
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| 105 | return 1;
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| 106 | }
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| 107 |
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| 108 | ASN1_SEQUENCE_cb(RSA_OAEP_PARAMS, rsa_oaep_cb) = {
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| 109 | ASN1_EXP_OPT(RSA_OAEP_PARAMS, hashFunc, X509_ALGOR, 0),
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| 110 | ASN1_EXP_OPT(RSA_OAEP_PARAMS, maskGenFunc, X509_ALGOR, 1),
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| 111 | ASN1_EXP_OPT(RSA_OAEP_PARAMS, pSourceFunc, X509_ALGOR, 2),
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| 112 | } ASN1_SEQUENCE_END_cb(RSA_OAEP_PARAMS, RSA_OAEP_PARAMS)
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| 113 |
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| 114 | IMPLEMENT_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
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| 115 |
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| 116 | IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPrivateKey, RSAPrivateKey)
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| 117 |
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| 118 | IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPublicKey, RSAPublicKey)
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| 119 |
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| 120 | RSA *RSAPublicKey_dup(const RSA *rsa)
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| 121 | {
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| 122 | return ASN1_item_dup(ASN1_ITEM_rptr(RSAPublicKey), rsa);
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| 123 | }
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| 124 |
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| 125 | RSA *RSAPrivateKey_dup(const RSA *rsa)
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| 126 | {
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| 127 | return ASN1_item_dup(ASN1_ITEM_rptr(RSAPrivateKey), rsa);
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| 128 | }
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