[331] | 1 | /*
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| 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (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 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1t.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include <openssl/rsa.h>
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| 15 | #include <openssl/bn.h>
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| 16 | #include <openssl/evp.h>
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| 17 | #include <openssl/x509v3.h>
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| 18 | #include <openssl/cms.h>
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| 19 | #include "internal/evp_int.h"
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| 20 | #include "rsa_locl.h"
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| 21 |
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| 22 | /* RSA pkey context structure */
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| 23 |
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| 24 | typedef struct {
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| 25 | /* Key gen parameters */
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| 26 | int nbits;
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| 27 | BIGNUM *pub_exp;
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| 28 | /* Keygen callback info */
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| 29 | int gentmp[2];
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| 30 | /* RSA padding mode */
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| 31 | int pad_mode;
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| 32 | /* message digest */
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| 33 | const EVP_MD *md;
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| 34 | /* message digest for MGF1 */
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| 35 | const EVP_MD *mgf1md;
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| 36 | /* PSS salt length */
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| 37 | int saltlen;
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| 38 | /* Temp buffer */
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| 39 | unsigned char *tbuf;
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| 40 | /* OAEP label */
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| 41 | unsigned char *oaep_label;
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| 42 | size_t oaep_labellen;
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| 43 | } RSA_PKEY_CTX;
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| 44 |
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| 45 | static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
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| 46 | {
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| 47 | RSA_PKEY_CTX *rctx;
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| 48 | rctx = OPENSSL_zalloc(sizeof(*rctx));
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| 49 | if (rctx == NULL)
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| 50 | return 0;
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| 51 | rctx->nbits = 1024;
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| 52 | rctx->pad_mode = RSA_PKCS1_PADDING;
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| 53 | rctx->saltlen = -2;
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| 54 | ctx->data = rctx;
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| 55 | ctx->keygen_info = rctx->gentmp;
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| 56 | ctx->keygen_info_count = 2;
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| 57 |
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| 58 | return 1;
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| 59 | }
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| 60 |
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| 61 | static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
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| 62 | {
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| 63 | RSA_PKEY_CTX *dctx, *sctx;
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| 64 | if (!pkey_rsa_init(dst))
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| 65 | return 0;
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| 66 | sctx = src->data;
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| 67 | dctx = dst->data;
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| 68 | dctx->nbits = sctx->nbits;
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| 69 | if (sctx->pub_exp) {
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| 70 | dctx->pub_exp = BN_dup(sctx->pub_exp);
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| 71 | if (!dctx->pub_exp)
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| 72 | return 0;
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| 73 | }
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| 74 | dctx->pad_mode = sctx->pad_mode;
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| 75 | dctx->md = sctx->md;
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| 76 | dctx->mgf1md = sctx->mgf1md;
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| 77 | if (sctx->oaep_label) {
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| 78 | OPENSSL_free(dctx->oaep_label);
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| 79 | dctx->oaep_label = OPENSSL_memdup(sctx->oaep_label, sctx->oaep_labellen);
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| 80 | if (!dctx->oaep_label)
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| 81 | return 0;
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| 82 | dctx->oaep_labellen = sctx->oaep_labellen;
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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 | static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
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| 88 | {
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| 89 | if (ctx->tbuf)
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| 90 | return 1;
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| 91 | ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
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| 92 | if (ctx->tbuf == NULL)
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| 93 | return 0;
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| 94 | return 1;
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| 95 | }
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| 96 |
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| 97 | static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
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| 98 | {
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| 99 | RSA_PKEY_CTX *rctx = ctx->data;
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| 100 | if (rctx) {
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| 101 | BN_free(rctx->pub_exp);
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| 102 | OPENSSL_free(rctx->tbuf);
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| 103 | OPENSSL_free(rctx->oaep_label);
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| 104 | OPENSSL_free(rctx);
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| 105 | }
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| 106 | }
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| 107 |
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| 108 | static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
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| 109 | size_t *siglen, const unsigned char *tbs,
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| 110 | size_t tbslen)
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| 111 | {
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| 112 | int ret;
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| 113 | RSA_PKEY_CTX *rctx = ctx->data;
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| 114 | RSA *rsa = ctx->pkey->pkey.rsa;
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| 115 |
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| 116 | if (rctx->md) {
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| 117 | if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
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| 118 | RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_INVALID_DIGEST_LENGTH);
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| 119 | return -1;
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| 120 | }
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| 121 |
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| 122 | if (EVP_MD_type(rctx->md) == NID_mdc2) {
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| 123 | unsigned int sltmp;
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| 124 | if (rctx->pad_mode != RSA_PKCS1_PADDING)
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| 125 | return -1;
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| 126 | ret = RSA_sign_ASN1_OCTET_STRING(0,
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| 127 | tbs, tbslen, sig, &sltmp, rsa);
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| 128 |
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| 129 | if (ret <= 0)
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| 130 | return ret;
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| 131 | ret = sltmp;
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| 132 | } else if (rctx->pad_mode == RSA_X931_PADDING) {
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| 133 | if ((size_t)EVP_PKEY_size(ctx->pkey) < tbslen + 1) {
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| 134 | RSAerr(RSA_F_PKEY_RSA_SIGN, RSA_R_KEY_SIZE_TOO_SMALL);
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| 135 | return -1;
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| 136 | }
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| 137 | if (!setup_tbuf(rctx, ctx)) {
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| 138 | RSAerr(RSA_F_PKEY_RSA_SIGN, ERR_R_MALLOC_FAILURE);
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| 139 | return -1;
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| 140 | }
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| 141 | memcpy(rctx->tbuf, tbs, tbslen);
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| 142 | rctx->tbuf[tbslen] = RSA_X931_hash_id(EVP_MD_type(rctx->md));
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| 143 | ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
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| 144 | sig, rsa, RSA_X931_PADDING);
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| 145 | } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
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| 146 | unsigned int sltmp;
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| 147 | ret = RSA_sign(EVP_MD_type(rctx->md),
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| 148 | tbs, tbslen, sig, &sltmp, rsa);
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| 149 | if (ret <= 0)
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| 150 | return ret;
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| 151 | ret = sltmp;
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| 152 | } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
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| 153 | if (!setup_tbuf(rctx, ctx))
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| 154 | return -1;
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| 155 | if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa,
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| 156 | rctx->tbuf, tbs,
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| 157 | rctx->md, rctx->mgf1md,
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| 158 | rctx->saltlen))
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| 159 | return -1;
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| 160 | ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf,
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| 161 | sig, rsa, RSA_NO_PADDING);
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| 162 | } else
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| 163 | return -1;
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| 164 | } else
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| 165 | ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
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| 166 | rctx->pad_mode);
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| 167 | if (ret < 0)
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| 168 | return ret;
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| 169 | *siglen = ret;
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| 170 | return 1;
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| 171 | }
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| 172 |
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| 173 | static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
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| 174 | unsigned char *rout, size_t *routlen,
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| 175 | const unsigned char *sig, size_t siglen)
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| 176 | {
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| 177 | int ret;
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| 178 | RSA_PKEY_CTX *rctx = ctx->data;
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| 179 |
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| 180 | if (rctx->md) {
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| 181 | if (rctx->pad_mode == RSA_X931_PADDING) {
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| 182 | if (!setup_tbuf(rctx, ctx))
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| 183 | return -1;
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| 184 | ret = RSA_public_decrypt(siglen, sig,
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| 185 | rctx->tbuf, ctx->pkey->pkey.rsa,
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| 186 | RSA_X931_PADDING);
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| 187 | if (ret < 1)
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| 188 | return 0;
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| 189 | ret--;
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| 190 | if (rctx->tbuf[ret] != RSA_X931_hash_id(EVP_MD_type(rctx->md))) {
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| 191 | RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
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| 192 | RSA_R_ALGORITHM_MISMATCH);
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| 193 | return 0;
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| 194 | }
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| 195 | if (ret != EVP_MD_size(rctx->md)) {
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| 196 | RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
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| 197 | RSA_R_INVALID_DIGEST_LENGTH);
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| 198 | return 0;
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| 199 | }
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| 200 | if (rout)
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| 201 | memcpy(rout, rctx->tbuf, ret);
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| 202 | } else if (rctx->pad_mode == RSA_PKCS1_PADDING) {
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| 203 | size_t sltmp;
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| 204 | ret = int_rsa_verify(EVP_MD_type(rctx->md),
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| 205 | NULL, 0, rout, &sltmp,
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| 206 | sig, siglen, ctx->pkey->pkey.rsa);
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| 207 | if (ret <= 0)
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| 208 | return 0;
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| 209 | ret = sltmp;
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| 210 | } else
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| 211 | return -1;
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| 212 | } else
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| 213 | ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
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| 214 | rctx->pad_mode);
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| 215 | if (ret < 0)
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| 216 | return ret;
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| 217 | *routlen = ret;
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| 218 | return 1;
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| 219 | }
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| 220 |
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| 221 | static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
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| 222 | const unsigned char *sig, size_t siglen,
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| 223 | const unsigned char *tbs, size_t tbslen)
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| 224 | {
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| 225 | RSA_PKEY_CTX *rctx = ctx->data;
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| 226 | RSA *rsa = ctx->pkey->pkey.rsa;
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| 227 | size_t rslen;
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| 228 | if (rctx->md) {
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| 229 | if (rctx->pad_mode == RSA_PKCS1_PADDING)
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| 230 | return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
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| 231 | sig, siglen, rsa);
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| 232 | if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
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| 233 | RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
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| 234 | return -1;
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| 235 | }
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| 236 | if (rctx->pad_mode == RSA_X931_PADDING) {
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| 237 | if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
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| 238 | return 0;
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| 239 | } else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) {
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| 240 | int ret;
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| 241 | if (!setup_tbuf(rctx, ctx))
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| 242 | return -1;
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| 243 | ret = RSA_public_decrypt(siglen, sig, rctx->tbuf,
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| 244 | rsa, RSA_NO_PADDING);
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| 245 | if (ret <= 0)
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| 246 | return 0;
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| 247 | ret = RSA_verify_PKCS1_PSS_mgf1(rsa, tbs,
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| 248 | rctx->md, rctx->mgf1md,
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| 249 | rctx->tbuf, rctx->saltlen);
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| 250 | if (ret <= 0)
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| 251 | return 0;
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| 252 | return 1;
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| 253 | } else
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| 254 | return -1;
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| 255 | } else {
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| 256 | if (!setup_tbuf(rctx, ctx))
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| 257 | return -1;
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| 258 | rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
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| 259 | rsa, rctx->pad_mode);
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| 260 | if (rslen == 0)
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| 261 | return 0;
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| 262 | }
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| 263 |
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| 264 | if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
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| 265 | return 0;
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| 266 |
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| 267 | return 1;
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| 268 |
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| 269 | }
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| 270 |
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| 271 | static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx,
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| 272 | unsigned char *out, size_t *outlen,
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| 273 | const unsigned char *in, size_t inlen)
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| 274 | {
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| 275 | int ret;
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| 276 | RSA_PKEY_CTX *rctx = ctx->data;
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| 277 | if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
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| 278 | int klen = RSA_size(ctx->pkey->pkey.rsa);
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| 279 | if (!setup_tbuf(rctx, ctx))
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| 280 | return -1;
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| 281 | if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx->tbuf, klen,
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| 282 | in, inlen,
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| 283 | rctx->oaep_label,
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| 284 | rctx->oaep_labellen,
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| 285 | rctx->md, rctx->mgf1md))
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| 286 | return -1;
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| 287 | ret = RSA_public_encrypt(klen, rctx->tbuf, out,
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| 288 | ctx->pkey->pkey.rsa, RSA_NO_PADDING);
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| 289 | } else
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| 290 | ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
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| 291 | rctx->pad_mode);
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| 292 | if (ret < 0)
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| 293 | return ret;
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| 294 | *outlen = ret;
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| 295 | return 1;
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| 296 | }
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| 297 |
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| 298 | static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx,
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| 299 | unsigned char *out, size_t *outlen,
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| 300 | const unsigned char *in, size_t inlen)
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| 301 | {
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| 302 | int ret;
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| 303 | RSA_PKEY_CTX *rctx = ctx->data;
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| 304 | if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
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| 305 | int i;
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| 306 | if (!setup_tbuf(rctx, ctx))
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| 307 | return -1;
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| 308 | ret = RSA_private_decrypt(inlen, in, rctx->tbuf,
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| 309 | ctx->pkey->pkey.rsa, RSA_NO_PADDING);
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| 310 | if (ret <= 0)
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| 311 | return ret;
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| 312 | for (i = 0; i < ret; i++) {
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| 313 | if (rctx->tbuf[i])
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| 314 | break;
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| 315 | }
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| 316 | ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, ret, rctx->tbuf + i,
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| 317 | ret - i, ret,
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| 318 | rctx->oaep_label,
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| 319 | rctx->oaep_labellen,
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| 320 | rctx->md, rctx->mgf1md);
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| 321 | } else
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| 322 | ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
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| 323 | rctx->pad_mode);
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| 324 | if (ret < 0)
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| 325 | return ret;
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| 326 | *outlen = ret;
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| 327 | return 1;
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| 328 | }
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| 329 |
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| 330 | static int check_padding_md(const EVP_MD *md, int padding)
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| 331 | {
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| 332 | int mdnid;
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| 333 | if (!md)
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| 334 | return 1;
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| 335 |
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| 336 | mdnid = EVP_MD_type(md);
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| 337 |
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| 338 | if (padding == RSA_NO_PADDING) {
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| 339 | RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
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| 340 | return 0;
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| 341 | }
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| 342 |
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| 343 | if (padding == RSA_X931_PADDING) {
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| 344 | if (RSA_X931_hash_id(mdnid) == -1) {
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| 345 | RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
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| 346 | return 0;
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| 347 | }
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| 348 | } else {
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| 349 | switch(mdnid) {
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| 350 | /* List of all supported RSA digests */
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| 351 | case NID_sha1:
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| 352 | case NID_sha224:
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| 353 | case NID_sha256:
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| 354 | case NID_sha384:
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| 355 | case NID_sha512:
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| 356 | case NID_md5:
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| 357 | case NID_md5_sha1:
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| 358 | case NID_md2:
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| 359 | case NID_md4:
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| 360 | case NID_mdc2:
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| 361 | case NID_ripemd160:
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| 362 | return 1;
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| 363 |
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| 364 | default:
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| 365 | RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_DIGEST);
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| 366 | return 0;
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| 367 |
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| 368 | }
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| 369 | }
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| 370 |
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| 371 | return 1;
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| 372 | }
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| 373 |
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| 374 | static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
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| 375 | {
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| 376 | RSA_PKEY_CTX *rctx = ctx->data;
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| 377 | switch (type) {
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| 378 | case EVP_PKEY_CTRL_RSA_PADDING:
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| 379 | if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
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| 380 | if (!check_padding_md(rctx->md, p1))
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| 381 | return 0;
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| 382 | if (p1 == RSA_PKCS1_PSS_PADDING) {
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| 383 | if (!(ctx->operation &
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| 384 | (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)))
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| 385 | goto bad_pad;
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| 386 | if (!rctx->md)
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| 387 | rctx->md = EVP_sha1();
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| 388 | }
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| 389 | if (p1 == RSA_PKCS1_OAEP_PADDING) {
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| 390 | if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
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| 391 | goto bad_pad;
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| 392 | if (!rctx->md)
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| 393 | rctx->md = EVP_sha1();
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| 394 | }
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| 395 | rctx->pad_mode = p1;
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| 396 | return 1;
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| 397 | }
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| 398 | bad_pad:
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| 399 | RSAerr(RSA_F_PKEY_RSA_CTRL,
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| 400 | RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
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| 401 | return -2;
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| 402 |
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| 403 | case EVP_PKEY_CTRL_GET_RSA_PADDING:
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| 404 | *(int *)p2 = rctx->pad_mode;
|
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| 405 | return 1;
|
---|
| 406 |
|
---|
| 407 | case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
|
---|
| 408 | case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN:
|
---|
| 409 | if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) {
|
---|
| 410 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
|
---|
| 411 | return -2;
|
---|
| 412 | }
|
---|
| 413 | if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
|
---|
| 414 | *(int *)p2 = rctx->saltlen;
|
---|
| 415 | else {
|
---|
| 416 | if (p1 < -2)
|
---|
| 417 | return -2;
|
---|
| 418 | rctx->saltlen = p1;
|
---|
| 419 | }
|
---|
| 420 | return 1;
|
---|
| 421 |
|
---|
| 422 | case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
|
---|
| 423 | if (p1 < 512) {
|
---|
| 424 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_KEY_SIZE_TOO_SMALL);
|
---|
| 425 | return -2;
|
---|
| 426 | }
|
---|
| 427 | rctx->nbits = p1;
|
---|
| 428 | return 1;
|
---|
| 429 |
|
---|
| 430 | case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
|
---|
| 431 | if (p2 == NULL || !BN_is_odd((BIGNUM *)p2) || BN_is_one((BIGNUM *)p2)) {
|
---|
| 432 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_BAD_E_VALUE);
|
---|
| 433 | return -2;
|
---|
| 434 | }
|
---|
| 435 | BN_free(rctx->pub_exp);
|
---|
| 436 | rctx->pub_exp = p2;
|
---|
| 437 | return 1;
|
---|
| 438 |
|
---|
| 439 | case EVP_PKEY_CTRL_RSA_OAEP_MD:
|
---|
| 440 | case EVP_PKEY_CTRL_GET_RSA_OAEP_MD:
|
---|
| 441 | if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
|
---|
| 442 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
|
---|
| 443 | return -2;
|
---|
| 444 | }
|
---|
| 445 | if (type == EVP_PKEY_CTRL_GET_RSA_OAEP_MD)
|
---|
| 446 | *(const EVP_MD **)p2 = rctx->md;
|
---|
| 447 | else
|
---|
| 448 | rctx->md = p2;
|
---|
| 449 | return 1;
|
---|
| 450 |
|
---|
| 451 | case EVP_PKEY_CTRL_MD:
|
---|
| 452 | if (!check_padding_md(p2, rctx->pad_mode))
|
---|
| 453 | return 0;
|
---|
| 454 | rctx->md = p2;
|
---|
| 455 | return 1;
|
---|
| 456 |
|
---|
| 457 | case EVP_PKEY_CTRL_GET_MD:
|
---|
| 458 | *(const EVP_MD **)p2 = rctx->md;
|
---|
| 459 | return 1;
|
---|
| 460 |
|
---|
| 461 | case EVP_PKEY_CTRL_RSA_MGF1_MD:
|
---|
| 462 | case EVP_PKEY_CTRL_GET_RSA_MGF1_MD:
|
---|
| 463 | if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING
|
---|
| 464 | && rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
|
---|
| 465 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_MGF1_MD);
|
---|
| 466 | return -2;
|
---|
| 467 | }
|
---|
| 468 | if (type == EVP_PKEY_CTRL_GET_RSA_MGF1_MD) {
|
---|
| 469 | if (rctx->mgf1md)
|
---|
| 470 | *(const EVP_MD **)p2 = rctx->mgf1md;
|
---|
| 471 | else
|
---|
| 472 | *(const EVP_MD **)p2 = rctx->md;
|
---|
| 473 | } else
|
---|
| 474 | rctx->mgf1md = p2;
|
---|
| 475 | return 1;
|
---|
| 476 |
|
---|
| 477 | case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
|
---|
| 478 | if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
|
---|
| 479 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
|
---|
| 480 | return -2;
|
---|
| 481 | }
|
---|
| 482 | OPENSSL_free(rctx->oaep_label);
|
---|
| 483 | if (p2 && p1 > 0) {
|
---|
| 484 | rctx->oaep_label = p2;
|
---|
| 485 | rctx->oaep_labellen = p1;
|
---|
| 486 | } else {
|
---|
| 487 | rctx->oaep_label = NULL;
|
---|
| 488 | rctx->oaep_labellen = 0;
|
---|
| 489 | }
|
---|
| 490 | return 1;
|
---|
| 491 |
|
---|
| 492 | case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL:
|
---|
| 493 | if (rctx->pad_mode != RSA_PKCS1_OAEP_PADDING) {
|
---|
| 494 | RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PADDING_MODE);
|
---|
| 495 | return -2;
|
---|
| 496 | }
|
---|
| 497 | *(unsigned char **)p2 = rctx->oaep_label;
|
---|
| 498 | return rctx->oaep_labellen;
|
---|
| 499 |
|
---|
| 500 | case EVP_PKEY_CTRL_DIGESTINIT:
|
---|
| 501 | case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
|
---|
| 502 | case EVP_PKEY_CTRL_PKCS7_DECRYPT:
|
---|
| 503 | case EVP_PKEY_CTRL_PKCS7_SIGN:
|
---|
| 504 | return 1;
|
---|
| 505 | #ifndef OPENSSL_NO_CMS
|
---|
| 506 | case EVP_PKEY_CTRL_CMS_DECRYPT:
|
---|
| 507 | case EVP_PKEY_CTRL_CMS_ENCRYPT:
|
---|
| 508 | case EVP_PKEY_CTRL_CMS_SIGN:
|
---|
| 509 | return 1;
|
---|
| 510 | #endif
|
---|
| 511 | case EVP_PKEY_CTRL_PEER_KEY:
|
---|
| 512 | RSAerr(RSA_F_PKEY_RSA_CTRL,
|
---|
| 513 | RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
|
---|
| 514 | return -2;
|
---|
| 515 |
|
---|
| 516 | default:
|
---|
| 517 | return -2;
|
---|
| 518 |
|
---|
| 519 | }
|
---|
| 520 | }
|
---|
| 521 |
|
---|
| 522 | static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
|
---|
| 523 | const char *type, const char *value)
|
---|
| 524 | {
|
---|
| 525 | if (!value) {
|
---|
| 526 | RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
|
---|
| 527 | return 0;
|
---|
| 528 | }
|
---|
| 529 | if (strcmp(type, "rsa_padding_mode") == 0) {
|
---|
| 530 | int pm;
|
---|
| 531 | if (strcmp(value, "pkcs1") == 0)
|
---|
| 532 | pm = RSA_PKCS1_PADDING;
|
---|
| 533 | else if (strcmp(value, "sslv23") == 0)
|
---|
| 534 | pm = RSA_SSLV23_PADDING;
|
---|
| 535 | else if (strcmp(value, "none") == 0)
|
---|
| 536 | pm = RSA_NO_PADDING;
|
---|
| 537 | else if (strcmp(value, "oeap") == 0)
|
---|
| 538 | pm = RSA_PKCS1_OAEP_PADDING;
|
---|
| 539 | else if (strcmp(value, "oaep") == 0)
|
---|
| 540 | pm = RSA_PKCS1_OAEP_PADDING;
|
---|
| 541 | else if (strcmp(value, "x931") == 0)
|
---|
| 542 | pm = RSA_X931_PADDING;
|
---|
| 543 | else if (strcmp(value, "pss") == 0)
|
---|
| 544 | pm = RSA_PKCS1_PSS_PADDING;
|
---|
| 545 | else {
|
---|
| 546 | RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_UNKNOWN_PADDING_TYPE);
|
---|
| 547 | return -2;
|
---|
| 548 | }
|
---|
| 549 | return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 | if (strcmp(type, "rsa_pss_saltlen") == 0) {
|
---|
| 553 | int saltlen;
|
---|
| 554 | saltlen = atoi(value);
|
---|
| 555 | return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen);
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | if (strcmp(type, "rsa_keygen_bits") == 0) {
|
---|
| 559 | int nbits;
|
---|
| 560 | nbits = atoi(value);
|
---|
| 561 | return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits);
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | if (strcmp(type, "rsa_keygen_pubexp") == 0) {
|
---|
| 565 | int ret;
|
---|
| 566 | BIGNUM *pubexp = NULL;
|
---|
| 567 | if (!BN_asc2bn(&pubexp, value))
|
---|
| 568 | return 0;
|
---|
| 569 | ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp);
|
---|
| 570 | if (ret <= 0)
|
---|
| 571 | BN_free(pubexp);
|
---|
| 572 | return ret;
|
---|
| 573 | }
|
---|
| 574 |
|
---|
| 575 | if (strcmp(type, "rsa_mgf1_md") == 0) {
|
---|
| 576 | const EVP_MD *md;
|
---|
| 577 | if ((md = EVP_get_digestbyname(value)) == NULL) {
|
---|
| 578 | RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
|
---|
| 579 | return 0;
|
---|
| 580 | }
|
---|
| 581 | return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 | if (strcmp(type, "rsa_oaep_md") == 0) {
|
---|
| 585 | const EVP_MD *md;
|
---|
| 586 | if ((md = EVP_get_digestbyname(value)) == NULL) {
|
---|
| 587 | RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
|
---|
| 588 | return 0;
|
---|
| 589 | }
|
---|
| 590 | return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
|
---|
| 591 | }
|
---|
| 592 | if (strcmp(type, "rsa_oaep_label") == 0) {
|
---|
| 593 | unsigned char *lab;
|
---|
| 594 | long lablen;
|
---|
| 595 | int ret;
|
---|
| 596 | lab = OPENSSL_hexstr2buf(value, &lablen);
|
---|
| 597 | if (!lab)
|
---|
| 598 | return 0;
|
---|
| 599 | ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
|
---|
| 600 | if (ret <= 0)
|
---|
| 601 | OPENSSL_free(lab);
|
---|
| 602 | return ret;
|
---|
| 603 | }
|
---|
| 604 |
|
---|
| 605 | return -2;
|
---|
| 606 | }
|
---|
| 607 |
|
---|
| 608 | static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
---|
| 609 | {
|
---|
| 610 | RSA *rsa = NULL;
|
---|
| 611 | RSA_PKEY_CTX *rctx = ctx->data;
|
---|
| 612 | BN_GENCB *pcb;
|
---|
| 613 | int ret;
|
---|
| 614 | if (rctx->pub_exp == NULL) {
|
---|
| 615 | rctx->pub_exp = BN_new();
|
---|
| 616 | if (rctx->pub_exp == NULL || !BN_set_word(rctx->pub_exp, RSA_F4))
|
---|
| 617 | return 0;
|
---|
| 618 | }
|
---|
| 619 | rsa = RSA_new();
|
---|
| 620 | if (rsa == NULL)
|
---|
| 621 | return 0;
|
---|
| 622 | if (ctx->pkey_gencb) {
|
---|
| 623 | pcb = BN_GENCB_new();
|
---|
| 624 | if (pcb == NULL) {
|
---|
| 625 | RSA_free(rsa);
|
---|
| 626 | return 0;
|
---|
| 627 | }
|
---|
| 628 | evp_pkey_set_cb_translate(pcb, ctx);
|
---|
| 629 | } else
|
---|
| 630 | pcb = NULL;
|
---|
| 631 | ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
|
---|
| 632 | BN_GENCB_free(pcb);
|
---|
| 633 | if (ret > 0)
|
---|
| 634 | EVP_PKEY_assign_RSA(pkey, rsa);
|
---|
| 635 | else
|
---|
| 636 | RSA_free(rsa);
|
---|
| 637 | return ret;
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 | const EVP_PKEY_METHOD rsa_pkey_meth = {
|
---|
| 641 | EVP_PKEY_RSA,
|
---|
| 642 | EVP_PKEY_FLAG_AUTOARGLEN,
|
---|
| 643 | pkey_rsa_init,
|
---|
| 644 | pkey_rsa_copy,
|
---|
| 645 | pkey_rsa_cleanup,
|
---|
| 646 |
|
---|
| 647 | 0, 0,
|
---|
| 648 |
|
---|
| 649 | 0,
|
---|
| 650 | pkey_rsa_keygen,
|
---|
| 651 |
|
---|
| 652 | 0,
|
---|
| 653 | pkey_rsa_sign,
|
---|
| 654 |
|
---|
| 655 | 0,
|
---|
| 656 | pkey_rsa_verify,
|
---|
| 657 |
|
---|
| 658 | 0,
|
---|
| 659 | pkey_rsa_verifyrecover,
|
---|
| 660 |
|
---|
| 661 | 0, 0, 0, 0,
|
---|
| 662 |
|
---|
| 663 | 0,
|
---|
| 664 | pkey_rsa_encrypt,
|
---|
| 665 |
|
---|
| 666 | 0,
|
---|
| 667 | pkey_rsa_decrypt,
|
---|
| 668 |
|
---|
| 669 | 0, 0,
|
---|
| 670 |
|
---|
| 671 | pkey_rsa_ctrl,
|
---|
| 672 | pkey_rsa_ctrl_str
|
---|
| 673 | };
|
---|