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bed7437b00
We previously took an EVP_KEYMGMT pointer, but now found it necessary to use a different import function in some cases. Since that's the only thing we use from EVP_KEYMGMT, we might as well pass the import function directly, allowing for some flexibility in how export_to is used. Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15293)
589 lines
14 KiB
C
589 lines
14 KiB
C
/*
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* Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <stdio.h>
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#include <openssl/x509.h>
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#include <openssl/asn1.h>
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#include <openssl/bn.h>
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#include <openssl/core_names.h>
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#include <openssl/param_build.h>
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#include "internal/cryptlib.h"
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#include "crypto/asn1.h"
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#include "crypto/dsa.h"
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#include "crypto/evp.h"
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#include "internal/ffc.h"
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#include "dsa_local.h"
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static int dsa_pub_decode(EVP_PKEY *pkey, const 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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const void *pval;
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const 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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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)) == NULL) {
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ERR_raise(ERR_LIB_DSA, DSA_R_DECODE_ERROR);
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goto err;
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}
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} else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
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if ((dsa = DSA_new()) == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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} else {
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ERR_raise(ERR_LIB_DSA, 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)) == NULL) {
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ERR_raise(ERR_LIB_DSA, 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)) == NULL) {
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ERR_raise(ERR_LIB_DSA, DSA_R_BN_DECODE_ERROR);
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goto err;
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}
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dsa->dirty_cnt++;
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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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ASN1_INTEGER_free(public_key);
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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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int ptype;
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unsigned char *penc = NULL;
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int penclen;
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ASN1_STRING *str = NULL;
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ASN1_INTEGER *pubint = NULL;
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ASN1_OBJECT *aobj;
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dsa = pkey->pkey.dsa;
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if (pkey->save_parameters
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&& dsa->params.p != NULL
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&& dsa->params.q != NULL
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&& dsa->params.g != NULL) {
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str = ASN1_STRING_new();
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if (str == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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str->length = i2d_DSAparams(dsa, &str->data);
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if (str->length <= 0) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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ptype = V_ASN1_SEQUENCE;
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} else
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ptype = V_ASN1_UNDEF;
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pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
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if (pubint == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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penclen = i2d_ASN1_INTEGER(pubint, &penc);
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ASN1_INTEGER_free(pubint);
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if (penclen <= 0) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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aobj = OBJ_nid2obj(EVP_PKEY_DSA);
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if (aobj == NULL)
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goto err;
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if (X509_PUBKEY_set0_param(pk, aobj, ptype, str, penc, penclen))
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return 1;
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err:
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OPENSSL_free(penc);
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ASN1_STRING_free(str);
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return 0;
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}
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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, const PKCS8_PRIV_KEY_INFO *p8)
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{
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int ret = 0;
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DSA *dsa = ossl_dsa_key_from_pkcs8(p8, NULL, NULL);
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if (dsa != NULL) {
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ret = 1;
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EVP_PKEY_assign_DSA(pkey, dsa);
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}
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return ret;
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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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if (pkey->pkey.dsa == NULL|| pkey->pkey.dsa->priv_key == NULL) {
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ERR_raise(ERR_LIB_DSA, DSA_R_MISSING_PARAMETERS);
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goto err;
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}
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params = ASN1_STRING_new();
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if (params == NULL) {
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ERR_raise(ERR_LIB_DSA, 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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ERR_raise(ERR_LIB_DSA, 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 == NULL) {
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ERR_raise(ERR_LIB_DSA, 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_STRING_clear_free(prkey);
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prkey = NULL;
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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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OPENSSL_free(dp);
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ASN1_STRING_free(params);
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ASN1_STRING_clear_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 DSA_bits(pkey->pkey.dsa);
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}
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static int dsa_security_bits(const EVP_PKEY *pkey)
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{
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return DSA_security_bits(pkey->pkey.dsa);
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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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return dsa == NULL
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|| dsa->params.p == NULL
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|| dsa->params.q == NULL
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|| dsa->params.g == NULL;
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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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if (to->pkey.dsa == NULL) {
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to->pkey.dsa = DSA_new();
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if (to->pkey.dsa == NULL)
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return 0;
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}
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if (!ossl_ffc_params_copy(&to->pkey.dsa->params, &from->pkey.dsa->params))
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return 0;
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to->pkey.dsa->dirty_cnt++;
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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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return ossl_ffc_params_cmp(&a->pkey.dsa->params, &b->pkey.dsa->params, 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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return BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) == 0;
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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 int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
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{
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int ret = 0;
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const char *ktype = NULL;
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const BIGNUM *priv_key, *pub_key;
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int mod_len = 0;
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if (x->params.p != NULL)
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mod_len = DSA_bits(x);
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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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if (priv_key != NULL) {
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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, mod_len) <= 0)
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goto err;
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} else {
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if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
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goto err;
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}
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if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
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goto err;
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if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
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goto err;
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if (!ossl_ffc_params_print(bp, &x->params, off))
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goto err;
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ret = 1;
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err:
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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)) == NULL)
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return 0;
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dsa->dirty_cnt++;
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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);
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}
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static int dsa_pub_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, 1);
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}
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static int dsa_priv_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, 2);
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}
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static int old_dsa_priv_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_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_DSA_LIB);
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return 0;
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}
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dsa->dirty_cnt++;
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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 old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
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}
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static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
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const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
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{
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DSA_SIG *dsa_sig;
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const unsigned char *p;
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if (sig == NULL) {
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if (BIO_puts(bp, "\n") <= 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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p = sig->data;
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dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
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if (dsa_sig != NULL) {
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int rv = 0;
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const BIGNUM *r, *s;
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DSA_SIG_get0(dsa_sig, &r, &s);
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if (BIO_write(bp, "\n", 1) != 1)
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goto err;
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if (!ASN1_bn_print(bp, "r: ", r, NULL, indent))
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goto err;
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if (!ASN1_bn_print(bp, "s: ", s, NULL, indent))
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goto err;
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rv = 1;
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err:
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DSA_SIG_free(dsa_sig);
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return rv;
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}
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if (BIO_puts(bp, "\n") <= 0)
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return 0;
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return X509_signature_dump(bp, sig, indent);
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}
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static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
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{
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switch (op) {
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case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
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*(int *)arg2 = NID_sha256;
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return 1;
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default:
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return -2;
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}
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}
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static size_t dsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
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{
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return pkey->pkey.dsa->dirty_cnt;
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}
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static int dsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
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OSSL_FUNC_keymgmt_import_fn *importer,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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DSA *dsa = from->pkey.dsa;
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OSSL_PARAM_BLD *tmpl;
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const BIGNUM *p = DSA_get0_p(dsa), *g = DSA_get0_g(dsa);
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const BIGNUM *q = DSA_get0_q(dsa), *pub_key = DSA_get0_pub_key(dsa);
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const BIGNUM *priv_key = DSA_get0_priv_key(dsa);
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OSSL_PARAM *params;
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int selection = 0;
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int rv = 0;
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/*
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* If the DSA method is foreign, then we can't be sure of anything, and
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* can therefore not export or pretend to export.
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*/
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if (DSA_get_method(dsa) != DSA_OpenSSL())
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return 0;
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if (p == NULL || q == NULL || g == NULL)
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return 0;
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tmpl = OSSL_PARAM_BLD_new();
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if (tmpl == NULL)
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return 0;
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if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p)
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|| !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_Q, q)
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|| !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g))
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goto err;
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selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
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if (pub_key != NULL) {
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if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY,
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pub_key))
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goto err;
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selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
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}
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if (priv_key != NULL) {
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if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
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priv_key))
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goto err;
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selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
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}
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if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
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goto err;
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/* We export, the provider imports */
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rv = importer(to_keydata, selection, params);
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OSSL_PARAM_free(params);
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err:
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OSSL_PARAM_BLD_free(tmpl);
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return rv;
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}
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static int dsa_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
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{
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EVP_PKEY_CTX *pctx = vpctx;
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EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
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DSA *dsa = ossl_dsa_new(pctx->libctx);
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if (dsa == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!ossl_dsa_ffc_params_fromdata(dsa, params)
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|
|| !ossl_dsa_key_fromdata(dsa, params)
|
|
|| !EVP_PKEY_assign_DSA(pkey, dsa)) {
|
|
DSA_free(dsa);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int dsa_pkey_copy(EVP_PKEY *to, EVP_PKEY *from)
|
|
{
|
|
DSA *dsa = from->pkey.dsa;
|
|
DSA *dupkey = NULL;
|
|
int ret;
|
|
|
|
if (dsa != NULL) {
|
|
dupkey = ossl_dsa_dup(dsa, OSSL_KEYMGMT_SELECT_ALL);
|
|
if (dupkey == NULL)
|
|
return 0;
|
|
}
|
|
|
|
ret = EVP_PKEY_assign_DSA(to, dupkey);
|
|
if (!ret)
|
|
DSA_free(dupkey);
|
|
return ret;
|
|
}
|
|
|
|
/* NB these are sorted in pkey_id order, lowest first */
|
|
|
|
const EVP_PKEY_ASN1_METHOD ossl_dsa_asn1_meths[5] = {
|
|
|
|
{
|
|
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_security_bits,
|
|
|
|
dsa_param_decode,
|
|
dsa_param_encode,
|
|
dsa_missing_parameters,
|
|
dsa_copy_parameters,
|
|
dsa_cmp_parameters,
|
|
dsa_param_print,
|
|
dsa_sig_print,
|
|
|
|
int_dsa_free,
|
|
dsa_pkey_ctrl,
|
|
old_dsa_priv_decode,
|
|
old_dsa_priv_encode,
|
|
|
|
NULL, NULL, NULL,
|
|
NULL, NULL, NULL,
|
|
NULL, NULL, NULL, NULL,
|
|
|
|
dsa_pkey_dirty_cnt,
|
|
dsa_pkey_export_to,
|
|
dsa_pkey_import_from,
|
|
dsa_pkey_copy
|
|
}
|
|
};
|