-/* crypto/rsa/rsa_pmeth.c */
/*
- * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
- * 2006.
- */
-/* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+ * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/x509v3.h>
-#ifndef OPENSSL_NO_CMS
-# include <openssl/cms.h>
-#endif
+#include <openssl/cms.h>
#include "internal/evp_int.h"
#include "rsa_locl.h"
const EVP_MD *mgf1md;
/* PSS salt length */
int saltlen;
+ /* Minimum salt length or -1 if no PSS parameter restriction */
+ int min_saltlen;
/* Temp buffer */
unsigned char *tbuf;
/* OAEP label */
size_t oaep_labellen;
} RSA_PKEY_CTX;
+/* True if PSS parameters are restricted */
+#define rsa_pss_restricted(rctx) (rctx->min_saltlen != -1)
+
static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
{
- RSA_PKEY_CTX *rctx;
- rctx = OPENSSL_malloc(sizeof(*rctx));
- if (!rctx)
+ RSA_PKEY_CTX *rctx = OPENSSL_zalloc(sizeof(*rctx));
+
+ if (rctx == NULL)
return 0;
rctx->nbits = 1024;
- rctx->pub_exp = NULL;
- rctx->pad_mode = RSA_PKCS1_PADDING;
- rctx->md = NULL;
- rctx->mgf1md = NULL;
- rctx->tbuf = NULL;
-
+ if (pkey_ctx_is_pss(ctx))
+ rctx->pad_mode = RSA_PKCS1_PSS_PADDING;
+ else
+ rctx->pad_mode = RSA_PKCS1_PADDING;
rctx->saltlen = -2;
-
- rctx->oaep_label = NULL;
- rctx->oaep_labellen = 0;
-
+ rctx->min_saltlen = -1;
ctx->data = rctx;
ctx->keygen_info = rctx->gentmp;
ctx->keygen_info_count = 2;
static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
RSA_PKEY_CTX *dctx, *sctx;
+
if (!pkey_rsa_init(dst))
return 0;
sctx = src->data;
dctx->mgf1md = sctx->mgf1md;
if (sctx->oaep_label) {
OPENSSL_free(dctx->oaep_label);
- dctx->oaep_label = BUF_memdup(sctx->oaep_label, sctx->oaep_labellen);
+ dctx->oaep_label = OPENSSL_memdup(sctx->oaep_label, sctx->oaep_labellen);
if (!dctx->oaep_label)
return 0;
dctx->oaep_labellen = sctx->oaep_labellen;
static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
{
- if (ctx->tbuf)
+ if (ctx->tbuf != NULL)
return 1;
ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
- if (!ctx->tbuf)
+ if (ctx->tbuf == NULL)
return 0;
return 1;
}
unsigned int sltmp;
if (rctx->pad_mode != RSA_PKCS1_PADDING)
return -1;
- ret = RSA_sign_ASN1_OCTET_STRING(NID_mdc2,
+ ret = RSA_sign_ASN1_OCTET_STRING(0,
tbs, tbslen, sig, &sltmp, rsa);
if (ret <= 0)
RSA_PKEY_CTX *rctx = ctx->data;
RSA *rsa = ctx->pkey->pkey.rsa;
size_t rslen;
+
if (rctx->md) {
if (rctx->pad_mode == RSA_PKCS1_PADDING)
return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
sig, siglen, rsa);
+ if (tbslen != (size_t)EVP_MD_size(rctx->md)) {
+ RSAerr(RSA_F_PKEY_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
+ return -1;
+ }
if (rctx->pad_mode == RSA_X931_PADDING) {
if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, sig, siglen) <= 0)
return 0;
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
+
if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
int klen = RSA_size(ctx->pkey->pkey.rsa);
if (!setup_tbuf(rctx, ctx))
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
+
if (rctx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
int i;
if (!setup_tbuf(rctx, ctx))
static int check_padding_md(const EVP_MD *md, int padding)
{
+ int mdnid;
+
if (!md)
return 1;
+ mdnid = EVP_MD_type(md);
+
if (padding == RSA_NO_PADDING) {
RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE);
return 0;
}
if (padding == RSA_X931_PADDING) {
- if (RSA_X931_hash_id(EVP_MD_type(md)) == -1) {
+ if (RSA_X931_hash_id(mdnid) == -1) {
RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_X931_DIGEST);
return 0;
}
- return 1;
+ } else {
+ switch(mdnid) {
+ /* List of all supported RSA digests */
+ case NID_sha1:
+ case NID_sha224:
+ case NID_sha256:
+ case NID_sha384:
+ case NID_sha512:
+ case NID_md5:
+ case NID_md5_sha1:
+ case NID_md2:
+ case NID_md4:
+ case NID_mdc2:
+ case NID_ripemd160:
+ return 1;
+
+ default:
+ RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_DIGEST);
+ return 0;
+
+ }
}
return 1;
static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
RSA_PKEY_CTX *rctx = ctx->data;
+
switch (type) {
case EVP_PKEY_CTRL_RSA_PADDING:
if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) {
goto bad_pad;
if (!rctx->md)
rctx->md = EVP_sha1();
+ } else if (pkey_ctx_is_pss(ctx)) {
+ goto bad_pad;
}
if (p1 == RSA_PKCS1_OAEP_PADDING) {
if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN);
return -2;
}
- if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN)
+ if (type == EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN) {
*(int *)p2 = rctx->saltlen;
- else {
+ } else {
if (p1 < -2)
return -2;
+ if (rsa_pss_restricted(rctx) && p1 < rctx->min_saltlen) {
+ RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_PSS_SALTLEN_TOO_SMALL);
+ return 0;
+ }
rctx->saltlen = p1;
}
return 1;
return 1;
case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP:
- if (!p2)
+ if (p2 == NULL || !BN_is_odd((BIGNUM *)p2) || BN_is_one((BIGNUM *)p2)) {
+ RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_BAD_E_VALUE);
return -2;
+ }
BN_free(rctx->pub_exp);
rctx->pub_exp = p2;
return 1;
case EVP_PKEY_CTRL_MD:
if (!check_padding_md(p2, rctx->pad_mode))
return 0;
+ if (rsa_pss_restricted(rctx)) {
+ if (EVP_MD_type(rctx->md) == EVP_MD_type(p2))
+ return 1;
+ RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_DIGEST_NOT_ALLOWED);
+ return 0;
+ }
rctx->md = p2;
return 1;
*(const EVP_MD **)p2 = rctx->mgf1md;
else
*(const EVP_MD **)p2 = rctx->md;
- } else
+ } else {
+ if (rsa_pss_restricted(rctx)) {
+ if (EVP_MD_type(rctx->md) == EVP_MD_type(p2))
+ return 1;
+ RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_MGF1_DIGEST_NOT_ALLOWED);
+ return 0;
+ }
rctx->mgf1md = p2;
+ }
return 1;
case EVP_PKEY_CTRL_RSA_OAEP_LABEL:
return rctx->oaep_labellen;
case EVP_PKEY_CTRL_DIGESTINIT:
+ case EVP_PKEY_CTRL_PKCS7_SIGN:
+#ifndef OPENSSL_NO_CMS
+ case EVP_PKEY_CTRL_CMS_SIGN:
+#endif
+ return 1;
+
case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
case EVP_PKEY_CTRL_PKCS7_DECRYPT:
- case EVP_PKEY_CTRL_PKCS7_SIGN:
- return 1;
#ifndef OPENSSL_NO_CMS
case EVP_PKEY_CTRL_CMS_DECRYPT:
case EVP_PKEY_CTRL_CMS_ENCRYPT:
- case EVP_PKEY_CTRL_CMS_SIGN:
+ if (!pkey_ctx_is_pss(ctx))
return 1;
#endif
case EVP_PKEY_CTRL_PEER_KEY:
static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
const char *type, const char *value)
{
- if (!value) {
+ if (value == NULL) {
RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING);
return 0;
}
return ret;
}
- if (strcmp(type, "rsa_mgf1_md") == 0) {
- const EVP_MD *md;
- if ((md = EVP_get_digestbyname(value)) == NULL) {
- RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
- return 0;
- }
- return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md);
- }
+ if (strcmp(type, "rsa_mgf1_md") == 0)
+ return EVP_PKEY_CTX_md(ctx,
+ EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT,
+ EVP_PKEY_CTRL_RSA_MGF1_MD, value);
- if (strcmp(type, "rsa_oaep_md") == 0) {
- const EVP_MD *md;
- if ((md = EVP_get_digestbyname(value)) == NULL) {
- RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_INVALID_DIGEST);
- return 0;
+ if (pkey_ctx_is_pss(ctx)) {
+
+ if (strcmp(type, "rsa_pss_keygen_mgf1_md") == 0)
+ return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_KEYGEN,
+ EVP_PKEY_CTRL_RSA_MGF1_MD, value);
+
+ if (strcmp(type, "rsa_pss_keygen_md") == 0)
+ return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_KEYGEN,
+ EVP_PKEY_CTRL_MD, value);
+
+ if (strcmp(type, "rsa_pss_keygen_saltlen") == 0) {
+ int saltlen = atoi(value);
+
+ return EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(ctx, saltlen);
}
- return EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md);
}
+
+ if (strcmp(type, "rsa_oaep_md") == 0)
+ return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_CRYPT,
+ EVP_PKEY_CTRL_RSA_OAEP_MD, value);
+
if (strcmp(type, "rsa_oaep_label") == 0) {
unsigned char *lab;
long lablen;
int ret;
- lab = string_to_hex(value, &lablen);
+ lab = OPENSSL_hexstr2buf(value, &lablen);
if (!lab)
return 0;
ret = EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, lab, lablen);
return -2;
}
+/* Set PSS parameters when generating a key, if necessary */
+static int rsa_set_pss_param(RSA *rsa, EVP_PKEY_CTX *ctx)
+{
+ RSA_PKEY_CTX *rctx = ctx->data;
+
+ if (!pkey_ctx_is_pss(ctx))
+ return 1;
+ /* If all parameters are default values don't set pss */
+ if (rctx->md == NULL && rctx->mgf1md == NULL && rctx->saltlen == -2)
+ return 1;
+ rsa->pss = rsa_pss_params_create(rctx->md, rctx->mgf1md,
+ rctx->saltlen == -2 ? 0 : rctx->saltlen);
+ if (rsa->pss == NULL)
+ return 0;
+ return 1;
+}
+
static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
RSA *rsa = NULL;
RSA_PKEY_CTX *rctx = ctx->data;
BN_GENCB *pcb;
int ret;
- if (!rctx->pub_exp) {
+
+ if (rctx->pub_exp == NULL) {
rctx->pub_exp = BN_new();
- if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4))
+ if (rctx->pub_exp == NULL || !BN_set_word(rctx->pub_exp, RSA_F4))
return 0;
}
rsa = RSA_new();
- if (!rsa)
+ if (rsa == NULL)
return 0;
if (ctx->pkey_gencb) {
pcb = BN_GENCB_new();
- if (!pcb) {
+ if (pcb == NULL) {
RSA_free(rsa);
return 0;
}
pcb = NULL;
ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb);
BN_GENCB_free(pcb);
+ if (ret > 0 && !rsa_set_pss_param(rsa, ctx)) {
+ RSA_free(rsa);
+ return 0;
+ }
if (ret > 0)
- EVP_PKEY_assign_RSA(pkey, rsa);
+ EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, rsa);
else
RSA_free(rsa);
return ret;
pkey_rsa_ctrl,
pkey_rsa_ctrl_str
};
+
+/*
+ * Called for PSS sign or verify initialisation: checks PSS parameter
+ * sanity and sets any restrictions on key usage.
+ */
+
+static int pkey_pss_init(EVP_PKEY_CTX *ctx)
+{
+ RSA *rsa;
+ RSA_PKEY_CTX *rctx = ctx->data;
+ const EVP_MD *md;
+ const EVP_MD *mgf1md;
+ int min_saltlen;
+
+ /* Should never happen */
+ if (!pkey_ctx_is_pss(ctx))
+ return 0;
+ rsa = ctx->pkey->pkey.rsa;
+ /* If no restrictions just return */
+ if (rsa->pss == NULL)
+ return 1;
+ /* Get and check parameters */
+ if (!rsa_pss_get_param(rsa->pss, &md, &mgf1md, &min_saltlen))
+ return 0;
+
+ rctx->min_saltlen = min_saltlen;
+
+ /*
+ * Set PSS restrictions as defaults: we can then block any attempt to
+ * use invalid values in pkey_rsa_ctrl
+ */
+
+ rctx->md = md;
+ rctx->mgf1md = mgf1md;
+ rctx->saltlen = min_saltlen;
+
+ return 1;
+}
+
+const EVP_PKEY_METHOD rsa_pss_pkey_meth = {
+ EVP_PKEY_RSA_PSS,
+ EVP_PKEY_FLAG_AUTOARGLEN,
+ pkey_rsa_init,
+ pkey_rsa_copy,
+ pkey_rsa_cleanup,
+
+ 0, 0,
+
+ 0,
+ pkey_rsa_keygen,
+
+ pkey_pss_init,
+ pkey_rsa_sign,
+
+ pkey_pss_init,
+ pkey_rsa_verify,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ pkey_rsa_ctrl,
+ pkey_rsa_ctrl_str
+};
projects / openssl.git / blobdiff