mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
699 lines
16 KiB
C
699 lines
16 KiB
C
/* crypto/rsa/rsa_ameth.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).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/x509.h>
|
|
#include <openssl/rsa.h>
|
|
#include <openssl/bn.h>
|
|
#ifndef OPENSSL_NO_CMS
|
|
#include <openssl/cms.h>
|
|
#endif
|
|
#include "asn1_locl.h"
|
|
|
|
static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
|
|
{
|
|
unsigned char *penc = NULL;
|
|
int penclen;
|
|
penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
|
|
if (penclen <= 0)
|
|
return 0;
|
|
if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
|
|
V_ASN1_NULL, NULL, penc, penclen))
|
|
return 1;
|
|
|
|
OPENSSL_free(penc);
|
|
return 0;
|
|
}
|
|
|
|
static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
|
|
{
|
|
const unsigned char *p;
|
|
int pklen;
|
|
RSA *rsa = NULL;
|
|
if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
|
|
return 0;
|
|
if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen)))
|
|
{
|
|
RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
|
|
return 0;
|
|
}
|
|
EVP_PKEY_assign_RSA (pkey, rsa);
|
|
return 1;
|
|
}
|
|
|
|
static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
|
|
{
|
|
if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0
|
|
|| BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int old_rsa_priv_decode(EVP_PKEY *pkey,
|
|
const unsigned char **pder, int derlen)
|
|
{
|
|
RSA *rsa;
|
|
if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
|
|
{
|
|
RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
|
|
return 0;
|
|
}
|
|
EVP_PKEY_assign_RSA(pkey, rsa);
|
|
return 1;
|
|
}
|
|
|
|
static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
|
|
{
|
|
return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
|
|
}
|
|
|
|
static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
|
|
{
|
|
unsigned char *rk = NULL;
|
|
int rklen;
|
|
rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
|
|
|
|
if (rklen <= 0)
|
|
{
|
|
RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
|
|
V_ASN1_NULL, NULL, rk, rklen))
|
|
{
|
|
RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
|
|
{
|
|
const unsigned char *p;
|
|
int pklen;
|
|
if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
|
|
return 0;
|
|
return old_rsa_priv_decode(pkey, &p, pklen);
|
|
}
|
|
|
|
static int int_rsa_size(const EVP_PKEY *pkey)
|
|
{
|
|
return RSA_size(pkey->pkey.rsa);
|
|
}
|
|
|
|
static int rsa_bits(const EVP_PKEY *pkey)
|
|
{
|
|
return BN_num_bits(pkey->pkey.rsa->n);
|
|
}
|
|
|
|
static void int_rsa_free(EVP_PKEY *pkey)
|
|
{
|
|
RSA_free(pkey->pkey.rsa);
|
|
}
|
|
|
|
|
|
static void update_buflen(const BIGNUM *b, size_t *pbuflen)
|
|
{
|
|
size_t i;
|
|
if (!b)
|
|
return;
|
|
if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
|
|
*pbuflen = i;
|
|
}
|
|
|
|
static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
|
|
{
|
|
char *str;
|
|
const char *s;
|
|
unsigned char *m=NULL;
|
|
int ret=0, mod_len = 0;
|
|
size_t buf_len=0;
|
|
|
|
update_buflen(x->n, &buf_len);
|
|
update_buflen(x->e, &buf_len);
|
|
|
|
if (priv)
|
|
{
|
|
update_buflen(x->d, &buf_len);
|
|
update_buflen(x->p, &buf_len);
|
|
update_buflen(x->q, &buf_len);
|
|
update_buflen(x->dmp1, &buf_len);
|
|
update_buflen(x->dmq1, &buf_len);
|
|
update_buflen(x->iqmp, &buf_len);
|
|
}
|
|
|
|
m=(unsigned char *)OPENSSL_malloc(buf_len+10);
|
|
if (m == NULL)
|
|
{
|
|
RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (x->n != NULL)
|
|
mod_len = BN_num_bits(x->n);
|
|
|
|
if(!BIO_indent(bp,off,128))
|
|
goto err;
|
|
|
|
if (priv && x->d)
|
|
{
|
|
if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len)
|
|
<= 0) goto err;
|
|
str = "modulus:";
|
|
s = "publicExponent:";
|
|
}
|
|
else
|
|
{
|
|
if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len)
|
|
<= 0) goto err;
|
|
str = "Modulus:";
|
|
s= "Exponent:";
|
|
}
|
|
if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err;
|
|
if (!ASN1_bn_print(bp,s,x->e,m,off))
|
|
goto err;
|
|
if (priv)
|
|
{
|
|
if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off))
|
|
goto err;
|
|
if (!ASN1_bn_print(bp,"prime1:",x->p,m,off))
|
|
goto err;
|
|
if (!ASN1_bn_print(bp,"prime2:",x->q,m,off))
|
|
goto err;
|
|
if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off))
|
|
goto err;
|
|
if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off))
|
|
goto err;
|
|
if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off))
|
|
goto err;
|
|
}
|
|
ret=1;
|
|
err:
|
|
if (m != NULL) OPENSSL_free(m);
|
|
return(ret);
|
|
}
|
|
|
|
static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|
ASN1_PCTX *ctx)
|
|
{
|
|
return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
|
|
}
|
|
|
|
|
|
static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|
ASN1_PCTX *ctx)
|
|
{
|
|
return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
|
|
}
|
|
|
|
static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
|
|
X509_ALGOR **pmaskHash)
|
|
{
|
|
const unsigned char *p;
|
|
int plen;
|
|
RSA_PSS_PARAMS *pss;
|
|
|
|
*pmaskHash = NULL;
|
|
|
|
if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
|
|
return NULL;
|
|
p = alg->parameter->value.sequence->data;
|
|
plen = alg->parameter->value.sequence->length;
|
|
pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
|
|
|
|
if (!pss)
|
|
return NULL;
|
|
|
|
if (pss->maskGenAlgorithm)
|
|
{
|
|
ASN1_TYPE *param = pss->maskGenAlgorithm->parameter;
|
|
if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1
|
|
&& param->type == V_ASN1_SEQUENCE)
|
|
{
|
|
p = param->value.sequence->data;
|
|
plen = param->value.sequence->length;
|
|
*pmaskHash = d2i_X509_ALGOR(NULL, &p, plen);
|
|
}
|
|
}
|
|
|
|
return pss;
|
|
}
|
|
|
|
static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
|
|
X509_ALGOR *maskHash, int indent)
|
|
{
|
|
int rv = 0;
|
|
if (!pss)
|
|
{
|
|
if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
if (BIO_puts(bp, "\n") <= 0)
|
|
goto err;
|
|
if (!BIO_indent(bp, indent, 128))
|
|
goto err;
|
|
if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
|
|
goto err;
|
|
|
|
if (pss->hashAlgorithm)
|
|
{
|
|
if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
|
|
goto err;
|
|
}
|
|
else if (BIO_puts(bp, "sha1 (default)") <= 0)
|
|
goto err;
|
|
|
|
if (BIO_puts(bp, "\n") <= 0)
|
|
goto err;
|
|
|
|
if (!BIO_indent(bp, indent, 128))
|
|
goto err;
|
|
|
|
if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
|
|
goto err;
|
|
if (pss->maskGenAlgorithm)
|
|
{
|
|
if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
|
|
goto err;
|
|
if (BIO_puts(bp, " with ") <= 0)
|
|
goto err;
|
|
if (maskHash)
|
|
{
|
|
if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
|
|
goto err;
|
|
}
|
|
else if (BIO_puts(bp, "INVALID") <= 0)
|
|
goto err;
|
|
}
|
|
else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
|
|
goto err;
|
|
BIO_puts(bp, "\n");
|
|
|
|
if (!BIO_indent(bp, indent, 128))
|
|
goto err;
|
|
if (BIO_puts(bp, "Salt Length: ") <= 0)
|
|
goto err;
|
|
if (pss->saltLength)
|
|
{
|
|
if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
|
|
goto err;
|
|
}
|
|
else if (BIO_puts(bp, "20 (default)") <= 0)
|
|
goto err;
|
|
BIO_puts(bp, "\n");
|
|
|
|
if (!BIO_indent(bp, indent, 128))
|
|
goto err;
|
|
if (BIO_puts(bp, "Trailer Field: ") <= 0)
|
|
goto err;
|
|
if (pss->trailerField)
|
|
{
|
|
if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
|
|
goto err;
|
|
}
|
|
else if (BIO_puts(bp, "0xbc (default)") <= 0)
|
|
goto err;
|
|
BIO_puts(bp, "\n");
|
|
|
|
rv = 1;
|
|
|
|
err:
|
|
return rv;
|
|
|
|
}
|
|
|
|
static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
|
|
const ASN1_STRING *sig,
|
|
int indent, ASN1_PCTX *pctx)
|
|
{
|
|
if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss)
|
|
{
|
|
int rv;
|
|
RSA_PSS_PARAMS *pss;
|
|
X509_ALGOR *maskHash;
|
|
pss = rsa_pss_decode(sigalg, &maskHash);
|
|
rv = rsa_pss_param_print(bp, pss, maskHash, indent);
|
|
if (pss)
|
|
RSA_PSS_PARAMS_free(pss);
|
|
if (maskHash)
|
|
X509_ALGOR_free(maskHash);
|
|
if (!rv)
|
|
return 0;
|
|
}
|
|
else if (!sig && BIO_puts(bp, "\n") <= 0)
|
|
return 0;
|
|
if (sig)
|
|
return X509_signature_dump(bp, sig, indent);
|
|
return 1;
|
|
}
|
|
|
|
static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
|
|
{
|
|
X509_ALGOR *alg = NULL;
|
|
switch (op)
|
|
{
|
|
|
|
case ASN1_PKEY_CTRL_PKCS7_SIGN:
|
|
if (arg1 == 0)
|
|
PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
|
|
break;
|
|
|
|
case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
|
|
if (arg1 == 0)
|
|
PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
|
|
break;
|
|
#ifndef OPENSSL_NO_CMS
|
|
case ASN1_PKEY_CTRL_CMS_SIGN:
|
|
if (arg1 == 0)
|
|
CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg);
|
|
break;
|
|
|
|
case ASN1_PKEY_CTRL_CMS_ENVELOPE:
|
|
if (arg1 == 0)
|
|
CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg);
|
|
break;
|
|
#endif
|
|
|
|
case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
|
|
*(int *)arg2 = NID_sha1;
|
|
return 1;
|
|
|
|
default:
|
|
return -2;
|
|
|
|
}
|
|
|
|
if (alg)
|
|
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
|
|
V_ASN1_NULL, 0);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/* Customised RSA item verification routine. This is called
|
|
* when a signature is encountered requiring special handling. We
|
|
* currently only handle PSS.
|
|
*/
|
|
|
|
|
|
static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|
X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
|
|
EVP_PKEY *pkey)
|
|
{
|
|
int rv = -1;
|
|
int saltlen;
|
|
const EVP_MD *mgf1md = NULL, *md = NULL;
|
|
RSA_PSS_PARAMS *pss;
|
|
X509_ALGOR *maskHash;
|
|
EVP_PKEY_CTX *pkctx;
|
|
/* Sanity check: make sure it is PSS */
|
|
if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
|
|
return -1;
|
|
}
|
|
/* Decode PSS parameters */
|
|
pss = rsa_pss_decode(sigalg, &maskHash);
|
|
|
|
if (pss == NULL)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_PSS_PARAMETERS);
|
|
goto err;
|
|
}
|
|
/* Check mask and lookup mask hash algorithm */
|
|
if (pss->maskGenAlgorithm)
|
|
{
|
|
if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) != NID_mgf1)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
|
|
goto err;
|
|
}
|
|
if (!maskHash)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_PARAMETER);
|
|
goto err;
|
|
}
|
|
mgf1md = EVP_get_digestbyobj(maskHash->algorithm);
|
|
if (mgf1md == NULL)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_MASK_DIGEST);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
mgf1md = EVP_sha1();
|
|
|
|
if (pss->hashAlgorithm)
|
|
{
|
|
md = EVP_get_digestbyobj(pss->hashAlgorithm->algorithm);
|
|
if (md == NULL)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_PSS_DIGEST);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
md = EVP_sha1();
|
|
|
|
if (pss->saltLength)
|
|
{
|
|
saltlen = ASN1_INTEGER_get(pss->saltLength);
|
|
|
|
/* Could perform more salt length sanity checks but the main
|
|
* RSA routines will trap other invalid values anyway.
|
|
*/
|
|
if (saltlen < 0)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_SALT_LENGTH);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
saltlen = 20;
|
|
|
|
/* low-level routines support only trailer field 0xbc (value 1)
|
|
* and PKCS#1 says we should reject any other value anyway.
|
|
*/
|
|
if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1)
|
|
{
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_TRAILER);
|
|
goto err;
|
|
}
|
|
|
|
/* We have all parameters now set up context */
|
|
|
|
if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
|
|
goto err;
|
|
|
|
if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
|
|
goto err;
|
|
/* Carry on */
|
|
rv = 2;
|
|
|
|
err:
|
|
RSA_PSS_PARAMS_free(pss);
|
|
if (maskHash)
|
|
X509_ALGOR_free(maskHash);
|
|
return rv;
|
|
}
|
|
|
|
static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
|
|
X509_ALGOR *alg1, X509_ALGOR *alg2,
|
|
ASN1_BIT_STRING *sig)
|
|
{
|
|
int pad_mode;
|
|
EVP_PKEY_CTX *pkctx = ctx->pctx;
|
|
if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
|
|
return 0;
|
|
if (pad_mode == RSA_PKCS1_PADDING)
|
|
return 2;
|
|
if (pad_mode == RSA_PKCS1_PSS_PADDING)
|
|
{
|
|
const EVP_MD *sigmd, *mgf1md;
|
|
RSA_PSS_PARAMS *pss = NULL;
|
|
X509_ALGOR *mgf1alg = NULL;
|
|
ASN1_STRING *os1 = NULL, *os2 = NULL;
|
|
EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
|
|
int saltlen, rv = 0;
|
|
sigmd = EVP_MD_CTX_md(ctx);
|
|
if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
|
|
goto err;
|
|
if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
|
|
goto err;
|
|
if (saltlen == -1)
|
|
saltlen = EVP_MD_size(sigmd);
|
|
else if (saltlen == -2)
|
|
{
|
|
saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
|
|
if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
|
|
saltlen--;
|
|
}
|
|
pss = RSA_PSS_PARAMS_new();
|
|
if (!pss)
|
|
goto err;
|
|
if (saltlen != 20)
|
|
{
|
|
pss->saltLength = ASN1_INTEGER_new();
|
|
if (!pss->saltLength)
|
|
goto err;
|
|
if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
|
|
goto err;
|
|
}
|
|
if (EVP_MD_type(sigmd) != NID_sha1)
|
|
{
|
|
pss->hashAlgorithm = X509_ALGOR_new();
|
|
if (!pss->hashAlgorithm)
|
|
goto err;
|
|
X509_ALGOR_set_md(pss->hashAlgorithm, sigmd);
|
|
}
|
|
if (EVP_MD_type(mgf1md) != NID_sha1)
|
|
{
|
|
ASN1_STRING *stmp = NULL;
|
|
/* need to embed algorithm ID inside another */
|
|
mgf1alg = X509_ALGOR_new();
|
|
X509_ALGOR_set_md(mgf1alg, mgf1md);
|
|
if (!ASN1_item_pack(mgf1alg, ASN1_ITEM_rptr(X509_ALGOR),
|
|
&stmp))
|
|
goto err;
|
|
pss->maskGenAlgorithm = X509_ALGOR_new();
|
|
if (!pss->maskGenAlgorithm)
|
|
goto err;
|
|
X509_ALGOR_set0(pss->maskGenAlgorithm,
|
|
OBJ_nid2obj(NID_mgf1),
|
|
V_ASN1_SEQUENCE, stmp);
|
|
}
|
|
/* Finally create string with pss parameter encoding. */
|
|
if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os1))
|
|
goto err;
|
|
if (alg2)
|
|
{
|
|
os2 = ASN1_STRING_dup(os1);
|
|
if (!os2)
|
|
goto err;
|
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
|
|
V_ASN1_SEQUENCE, os2);
|
|
}
|
|
X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
|
|
V_ASN1_SEQUENCE, os1);
|
|
os1 = os2 = NULL;
|
|
rv = 3;
|
|
err:
|
|
if (mgf1alg)
|
|
X509_ALGOR_free(mgf1alg);
|
|
if (pss)
|
|
RSA_PSS_PARAMS_free(pss);
|
|
if (os1)
|
|
ASN1_STRING_free(os1);
|
|
return rv;
|
|
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
|
|
{
|
|
{
|
|
EVP_PKEY_RSA,
|
|
EVP_PKEY_RSA,
|
|
ASN1_PKEY_SIGPARAM_NULL,
|
|
|
|
"RSA",
|
|
"OpenSSL RSA method",
|
|
|
|
rsa_pub_decode,
|
|
rsa_pub_encode,
|
|
rsa_pub_cmp,
|
|
rsa_pub_print,
|
|
|
|
rsa_priv_decode,
|
|
rsa_priv_encode,
|
|
rsa_priv_print,
|
|
|
|
int_rsa_size,
|
|
rsa_bits,
|
|
|
|
0,0,0,0,0,0,
|
|
|
|
rsa_sig_print,
|
|
int_rsa_free,
|
|
rsa_pkey_ctrl,
|
|
old_rsa_priv_decode,
|
|
old_rsa_priv_encode,
|
|
rsa_item_verify,
|
|
rsa_item_sign
|
|
},
|
|
|
|
{
|
|
EVP_PKEY_RSA2,
|
|
EVP_PKEY_RSA,
|
|
ASN1_PKEY_ALIAS
|
|
}
|
|
};
|