624 lines
14 KiB
C
624 lines
14 KiB
C
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 2006.
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*/
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/* ====================================================================
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/x509.h>
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#include <openssl/asn1.h>
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#include <openssl/dsa.h>
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#include "asn1_locl.h"
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static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
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{
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const unsigned char *p, *pm;
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int pklen, pmlen;
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int ptype;
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void *pval;
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ASN1_STRING *pstr;
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X509_ALGOR *palg;
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ASN1_INTEGER *public_key = NULL;
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DSA *dsa = NULL;
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if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
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return 0;
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X509_ALGOR_get0(NULL, &ptype, &pval, palg);
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if (ptype == V_ASN1_SEQUENCE)
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{
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pstr = pval;
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pm = pstr->data;
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pmlen = pstr->length;
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if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
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{
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DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
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goto err;
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}
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}
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else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
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{
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if (!(dsa = DSA_new()))
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{
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DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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}
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else
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{
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DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
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goto err;
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}
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if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
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{
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DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
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goto err;
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}
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if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
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{
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DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
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goto err;
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}
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ASN1_INTEGER_free(public_key);
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EVP_PKEY_assign_DSA(pkey, dsa);
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return 1;
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err:
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if (pubkey)
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ASN1_INTEGER_free(public_key);
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if (dsa)
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DSA_free(dsa);
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return 0;
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}
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static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
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{
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DSA *dsa;
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void *pval = NULL;
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int ptype;
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unsigned char *penc = NULL;
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int penclen;
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dsa=pkey->pkey.dsa;
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if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
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{
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ASN1_STRING *str;
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str = ASN1_STRING_new();
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str->length = i2d_DSAparams(dsa, &str->data);
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if (str->length <= 0)
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{
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DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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pval = str;
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ptype = V_ASN1_SEQUENCE;
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}
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else
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ptype = V_ASN1_UNDEF;
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dsa->write_params=0;
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penclen = i2d_DSAPublicKey(dsa, &penc);
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if (penclen <= 0)
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{
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DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
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ptype, pval, penc, penclen))
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return 1;
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err:
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if (penc)
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OPENSSL_free(penc);
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if (pval)
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ASN1_STRING_free(pval);
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return 0;
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}
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/* In PKCS#8 DSA: you just get a private key integer and parameters in the
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* AlgorithmIdentifier the pubkey must be recalculated.
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*/
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static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
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{
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const unsigned char *p, *pm;
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int pklen, pmlen;
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int ptype;
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void *pval;
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ASN1_STRING *pstr;
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X509_ALGOR *palg;
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ASN1_INTEGER *privkey = NULL;
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BN_CTX *ctx = NULL;
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STACK_OF(ASN1_TYPE) *ndsa = NULL;
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DSA *dsa = NULL;
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if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
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return 0;
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X509_ALGOR_get0(NULL, &ptype, &pval, palg);
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/* Check for broken DSA PKCS#8, UGH! */
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if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
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{
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ASN1_TYPE *t1, *t2;
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if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pklen,
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d2i_ASN1_TYPE,
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ASN1_TYPE_free)))
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goto decerr;
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if (sk_ASN1_TYPE_num(ndsa) != 2)
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goto decerr;
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/* Handle Two broken types:
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* SEQUENCE {parameters, priv_key}
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* SEQUENCE {pub_key, priv_key}
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*/
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t1 = sk_ASN1_TYPE_value(ndsa, 0);
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t2 = sk_ASN1_TYPE_value(ndsa, 1);
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if (t1->type == V_ASN1_SEQUENCE)
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{
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p8->broken = PKCS8_EMBEDDED_PARAM;
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pval = t1->value.ptr;
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}
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else if (ptype == V_ASN1_SEQUENCE)
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p8->broken = PKCS8_NS_DB;
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else
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goto decerr;
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if (t2->type != V_ASN1_INTEGER)
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goto decerr;
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privkey = t2->value.integer;
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}
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else
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{
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if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
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goto decerr;
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if (ptype != V_ASN1_SEQUENCE)
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goto decerr;
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}
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pstr = pval;
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pm = pstr->data;
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pmlen = pstr->length;
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if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
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goto decerr;
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/* We have parameters now set private key */
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if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
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{
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DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
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goto dsaerr;
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}
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/* Calculate public key */
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if (!(dsa->pub_key = BN_new()))
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{
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DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
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goto dsaerr;
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}
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if (!(ctx = BN_CTX_new()))
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{
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DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
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goto dsaerr;
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}
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if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
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{
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DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
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goto dsaerr;
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}
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EVP_PKEY_assign_DSA(pkey, dsa);
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BN_CTX_free (ctx);
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if(ndsa)
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
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else
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ASN1_INTEGER_free(privkey);
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return 1;
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decerr:
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DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
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dsaerr:
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BN_CTX_free (ctx);
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if (privkey)
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ASN1_INTEGER_free(privkey);
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
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DSA_free(dsa);
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return 0;
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}
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static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
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{
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ASN1_STRING *params = NULL;
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ASN1_INTEGER *prkey = NULL;
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unsigned char *dp = NULL;
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int dplen;
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params = ASN1_STRING_new();
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if (!params)
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{
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DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
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if (params->length <= 0)
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{
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DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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params->type = V_ASN1_SEQUENCE;
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/* Get private key into integer */
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prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
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if (!prkey)
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{
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DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
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goto err;
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}
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dplen = i2d_ASN1_INTEGER(prkey, &dp);
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ASN1_INTEGER_free(prkey);
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if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
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V_ASN1_SEQUENCE, params, dp, dplen))
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goto err;
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return 1;
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err:
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if (dp != NULL)
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OPENSSL_free(dp);
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if (params != NULL)
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ASN1_STRING_free(params);
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if (prkey != NULL)
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ASN1_INTEGER_free(prkey);
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return 0;
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}
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static int int_dsa_size(const EVP_PKEY *pkey)
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{
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return(DSA_size(pkey->pkey.dsa));
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}
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static int dsa_bits(const EVP_PKEY *pkey)
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{
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return BN_num_bits(pkey->pkey.dsa->p);
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}
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static int dsa_missing_parameters(const EVP_PKEY *pkey)
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{
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DSA *dsa;
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dsa=pkey->pkey.dsa;
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if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
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return 1;
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return 0;
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}
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static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
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{
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BIGNUM *a;
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if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
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return 0;
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if (to->pkey.dsa->p != NULL)
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BN_free(to->pkey.dsa->p);
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to->pkey.dsa->p=a;
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if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
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return 0;
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if (to->pkey.dsa->q != NULL)
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BN_free(to->pkey.dsa->q);
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to->pkey.dsa->q=a;
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if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
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return 0;
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if (to->pkey.dsa->g != NULL)
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BN_free(to->pkey.dsa->g);
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to->pkey.dsa->g=a;
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return 1;
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}
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static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
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{
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if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
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BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
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BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
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return 0;
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else
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return 1;
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}
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static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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{
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if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
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return 0;
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else
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return 1;
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}
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static void int_dsa_free(EVP_PKEY *pkey)
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{
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DSA_free(pkey->pkey.dsa);
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}
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static void update_buflen(const BIGNUM *b, size_t *pbuflen)
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{
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size_t i;
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if (!b)
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return;
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if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
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*pbuflen = i;
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}
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static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
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{
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unsigned char *m=NULL;
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int ret=0;
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size_t buf_len=0;
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const char *ktype = NULL;
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const BIGNUM *priv_key, *pub_key;
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if (ptype == 2)
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priv_key = x->priv_key;
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else
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priv_key = NULL;
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if (ptype > 0)
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pub_key = x->pub_key;
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else
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pub_key = NULL;
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if (ptype == 2)
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ktype = "Private-Key";
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else if (ptype == 1)
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ktype = "Public-Key";
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else
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ktype = "DSA-Parameters";
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update_buflen(x->p, &buf_len);
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update_buflen(x->q, &buf_len);
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update_buflen(x->g, &buf_len);
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update_buflen(priv_key, &buf_len);
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update_buflen(pub_key, &buf_len);
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m=(unsigned char *)OPENSSL_malloc(buf_len+10);
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if (m == NULL)
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{
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DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (priv_key)
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{
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if(!BIO_indent(bp,off,128))
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goto err;
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if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
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<= 0) goto err;
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}
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if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
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goto err;
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if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
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goto err;
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if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
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if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
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if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
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ret=1;
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err:
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if (m != NULL) OPENSSL_free(m);
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return(ret);
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}
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static int dsa_param_decode(EVP_PKEY *pkey,
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const unsigned char **pder, int derlen)
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{
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DSA *dsa;
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if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
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{
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DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
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return 0;
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}
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EVP_PKEY_assign_DSA(pkey, dsa);
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return 1;
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}
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static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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return i2d_DSAparams(pkey->pkey.dsa, pder);
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}
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static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *ctx)
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{
|
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return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
|
|
}
|
|
|
|
static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|
ASN1_PCTX *ctx)
|
|
{
|
|
return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
|
|
}
|
|
|
|
|
|
static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
|
|
ASN1_PCTX *ctx)
|
|
{
|
|
return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
|
|
}
|
|
|
|
static int old_dsa_priv_decode(EVP_PKEY *pkey,
|
|
const unsigned char **pder, int derlen)
|
|
{
|
|
DSA *dsa;
|
|
if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
|
|
{
|
|
DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
|
|
return 0;
|
|
}
|
|
EVP_PKEY_assign_DSA(pkey, dsa);
|
|
return 1;
|
|
}
|
|
|
|
static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
|
|
{
|
|
return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
|
|
}
|
|
|
|
static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
|
|
{
|
|
switch (op)
|
|
{
|
|
case ASN1_PKEY_CTRL_PKCS7_SIGN:
|
|
if (arg1 == 0)
|
|
{
|
|
X509_ALGOR *alg1, *alg2;
|
|
PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
|
|
X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_sha1),
|
|
V_ASN1_NULL, 0);
|
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_dsaWithSHA1),
|
|
V_ASN1_UNDEF, 0);
|
|
}
|
|
return 1;
|
|
|
|
case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
|
|
*(int *)arg2 = NID_sha1;
|
|
return 2;
|
|
|
|
default:
|
|
return -2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* NB these are sorted in pkey_id order, lowest first */
|
|
|
|
const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
|
|
{
|
|
|
|
{
|
|
EVP_PKEY_DSA2,
|
|
EVP_PKEY_DSA,
|
|
ASN1_PKEY_ALIAS
|
|
},
|
|
|
|
{
|
|
EVP_PKEY_DSA1,
|
|
EVP_PKEY_DSA,
|
|
ASN1_PKEY_ALIAS
|
|
},
|
|
|
|
{
|
|
EVP_PKEY_DSA4,
|
|
EVP_PKEY_DSA,
|
|
ASN1_PKEY_ALIAS
|
|
},
|
|
|
|
{
|
|
EVP_PKEY_DSA3,
|
|
EVP_PKEY_DSA,
|
|
ASN1_PKEY_ALIAS
|
|
},
|
|
|
|
{
|
|
EVP_PKEY_DSA,
|
|
EVP_PKEY_DSA,
|
|
0,
|
|
|
|
"DSA",
|
|
"OpenSSL DSA method",
|
|
|
|
dsa_pub_decode,
|
|
dsa_pub_encode,
|
|
dsa_pub_cmp,
|
|
dsa_pub_print,
|
|
|
|
dsa_priv_decode,
|
|
dsa_priv_encode,
|
|
dsa_priv_print,
|
|
|
|
int_dsa_size,
|
|
dsa_bits,
|
|
|
|
dsa_param_decode,
|
|
dsa_param_encode,
|
|
dsa_missing_parameters,
|
|
dsa_copy_parameters,
|
|
dsa_cmp_parameters,
|
|
dsa_param_print,
|
|
|
|
int_dsa_free,
|
|
dsa_pkey_ctrl,
|
|
old_dsa_priv_decode,
|
|
old_dsa_priv_encode
|
|
}
|
|
};
|
|
|