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/* $OpenBSD: pmeth_lib.c,v 1.5 2014/06/12 15:49:29 deraadt Exp $ */
/* 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 <stdlib.h>
#include "cryptlib.h"
#include <openssl/objects.h>
#include <openssl/evp.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include "asn1_locl.h"
#include "evp_locl.h"
typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
DECLARE_STACK_OF(EVP_PKEY_METHOD)
STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
static const EVP_PKEY_METHOD *standard_methods[] = {
#ifndef OPENSSL_NO_RSA
&rsa_pkey_meth,
#endif
#ifndef OPENSSL_NO_DH
&dh_pkey_meth,
#endif
#ifndef OPENSSL_NO_DSA
&dsa_pkey_meth,
#endif
#ifndef OPENSSL_NO_EC
&ec_pkey_meth,
#endif
&hmac_pkey_meth,
&cmac_pkey_meth
};
DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
pmeth);
static int
pmeth_cmp(const EVP_PKEY_METHOD * const *a, const EVP_PKEY_METHOD * const *b)
{
return ((*a)->pkey_id - (*b)->pkey_id);
}
IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
pmeth);
const EVP_PKEY_METHOD *
EVP_PKEY_meth_find(int type)
{
EVP_PKEY_METHOD tmp;
const EVP_PKEY_METHOD *t = &tmp, **ret;
tmp.pkey_id = type;
if (app_pkey_methods) {
int idx;
idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
if (idx >= 0)
return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
}
ret = OBJ_bsearch_pmeth(&t, standard_methods,
sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
if (!ret || !*ret)
return NULL;
return *ret;
}
static EVP_PKEY_CTX *
int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
{
EVP_PKEY_CTX *ret;
const EVP_PKEY_METHOD *pmeth;
if (id == -1) {
if (!pkey || !pkey->ameth)
return NULL;
id = pkey->ameth->pkey_id;
}
#ifndef OPENSSL_NO_ENGINE
if (pkey && pkey->engine)
e = pkey->engine;
/* Try to find an ENGINE which implements this method */
if (e) {
if (!ENGINE_init(e)) {
EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
return NULL;
}
} else
e = ENGINE_get_pkey_meth_engine(id);
/* If an ENGINE handled this method look it up. Othewise
* use internal tables.
*/
if (e)
pmeth = ENGINE_get_pkey_meth(e, id);
else
#endif
pmeth = EVP_PKEY_meth_find(id);
if (pmeth == NULL) {
EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
return NULL;
}
ret = malloc(sizeof(EVP_PKEY_CTX));
if (!ret) {
#ifndef OPENSSL_NO_ENGINE
if (e)
ENGINE_finish(e);
#endif
EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->engine = e;
ret->pmeth = pmeth;
ret->operation = EVP_PKEY_OP_UNDEFINED;
ret->pkey = pkey;
ret->peerkey = NULL;
ret->pkey_gencb = 0;
if (pkey)
CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
ret->data = NULL;
if (pmeth->init) {
if (pmeth->init(ret) <= 0) {
EVP_PKEY_CTX_free(ret);
return NULL;
}
}
return ret;
}
EVP_PKEY_METHOD*
EVP_PKEY_meth_new(int id, int flags)
{
EVP_PKEY_METHOD *pmeth;
pmeth = calloc(1, sizeof(EVP_PKEY_METHOD));
if (!pmeth)
return NULL;
pmeth->pkey_id = id;
pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
pmeth->init = 0;
pmeth->copy = 0;
pmeth->cleanup = 0;
pmeth->paramgen_init = 0;
pmeth->paramgen = 0;
pmeth->keygen_init = 0;
pmeth->keygen = 0;
pmeth->sign_init = 0;
pmeth->sign = 0;
pmeth->verify_init = 0;
pmeth->verify = 0;
pmeth->verify_recover_init = 0;
pmeth->verify_recover = 0;
pmeth->signctx_init = 0;
pmeth->signctx = 0;
pmeth->verifyctx_init = 0;
pmeth->verifyctx = 0;
pmeth->encrypt_init = 0;
pmeth->encrypt = 0;
pmeth->decrypt_init = 0;
pmeth->decrypt = 0;
pmeth->derive_init = 0;
pmeth->derive = 0;
pmeth->ctrl = 0;
pmeth->ctrl_str = 0;
return pmeth;
}
void
EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags, const EVP_PKEY_METHOD *meth)
{
if (ppkey_id)
*ppkey_id = meth->pkey_id;
if (pflags)
*pflags = meth->flags;
}
void
EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
{
dst->init = src->init;
dst->copy = src->copy;
dst->cleanup = src->cleanup;
dst->paramgen_init = src->paramgen_init;
dst->paramgen = src->paramgen;
dst->keygen_init = src->keygen_init;
dst->keygen = src->keygen;
dst->sign_init = src->sign_init;
dst->sign = src->sign;
dst->verify_init = src->verify_init;
dst->verify = src->verify;
dst->verify_recover_init = src->verify_recover_init;
dst->verify_recover = src->verify_recover;
dst->signctx_init = src->signctx_init;
dst->signctx = src->signctx;
dst->verifyctx_init = src->verifyctx_init;
dst->verifyctx = src->verifyctx;
dst->encrypt_init = src->encrypt_init;
dst->encrypt = src->encrypt;
dst->decrypt_init = src->decrypt_init;
dst->decrypt = src->decrypt;
dst->derive_init = src->derive_init;
dst->derive = src->derive;
dst->ctrl = src->ctrl;
dst->ctrl_str = src->ctrl_str;
}
void
EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
{
if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
free(pmeth);
}
EVP_PKEY_CTX *
EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
{
return int_ctx_new(pkey, e, -1);
}
EVP_PKEY_CTX *
EVP_PKEY_CTX_new_id(int id, ENGINE *e)
{
return int_ctx_new(NULL, e, id);
}
EVP_PKEY_CTX *
EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
{
EVP_PKEY_CTX *rctx;
if (!pctx->pmeth || !pctx->pmeth->copy)
return NULL;
#ifndef OPENSSL_NO_ENGINE
/* Make sure it's safe to copy a pkey context using an ENGINE */
if (pctx->engine && !ENGINE_init(pctx->engine)) {
EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
return 0;
}
#endif
rctx = malloc(sizeof(EVP_PKEY_CTX));
if (!rctx)
return NULL;
rctx->pmeth = pctx->pmeth;
#ifndef OPENSSL_NO_ENGINE
rctx->engine = pctx->engine;
#endif
if (pctx->pkey)
CRYPTO_add(&pctx->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
rctx->pkey = pctx->pkey;
if (pctx->peerkey)
CRYPTO_add(&pctx->peerkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
rctx->peerkey = pctx->peerkey;
rctx->data = NULL;
rctx->app_data = NULL;
rctx->operation = pctx->operation;
if (pctx->pmeth->copy(rctx, pctx) > 0)
return rctx;
EVP_PKEY_CTX_free(rctx);
return NULL;
}
int
EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
{
if (app_pkey_methods == NULL) {
app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
if (!app_pkey_methods)
return 0;
}
if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
return 0;
sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
return 1;
}
void
EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
{
if (ctx == NULL)
return;
if (ctx->pmeth && ctx->pmeth->cleanup)
ctx->pmeth->cleanup(ctx);
if (ctx->pkey)
EVP_PKEY_free(ctx->pkey);
if (ctx->peerkey)
EVP_PKEY_free(ctx->peerkey);
#ifndef OPENSSL_NO_ENGINE
if (ctx->engine)
/* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
* functional reference we held for this reason. */
ENGINE_finish(ctx->engine);
#endif
free(ctx);
}
int
EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, int cmd,
int p1, void *p2)
{
int ret;
if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
return -2;
}
if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
return -1;
if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
return -1;
}
if ((optype != -1) && !(ctx->operation & optype)) {
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
return -1;
}
ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
if (ret == -2)
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
return ret;
}
int
EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx, const char *name, const char *value)
{
if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
EVP_R_COMMAND_NOT_SUPPORTED);
return -2;
}
if (!strcmp(name, "digest")) {
const EVP_MD *md;
if (!value || !(md = EVP_get_digestbyname(value))) {
EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
EVP_R_INVALID_DIGEST);
return 0;
}
return EVP_PKEY_CTX_set_signature_md(ctx, md);
}
return ctx->pmeth->ctrl_str(ctx, name, value);
}
int
EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
{
return ctx->operation;
}
void
EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
{
ctx->keygen_info = dat;
ctx->keygen_info_count = datlen;
}
void
EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
{
ctx->data = data;
}
void *
EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
{
return ctx->data;
}
EVP_PKEY *
EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
{
return ctx->pkey;
}
EVP_PKEY *
EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
{
return ctx->peerkey;
}
void
EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
{
ctx->app_data = data;
}
void *
EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
{
return ctx->app_data;
}
void
EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
int (*init)(EVP_PKEY_CTX *ctx))
{
pmeth->init = init;
}
void
EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
{
pmeth->copy = copy;
}
void
EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
void (*cleanup)(EVP_PKEY_CTX *ctx))
{
pmeth->cleanup = cleanup;
}
void
EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
int (*paramgen_init)(EVP_PKEY_CTX *ctx),
int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
{
pmeth->paramgen_init = paramgen_init;
pmeth->paramgen = paramgen;
}
void
EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
int (*keygen_init)(EVP_PKEY_CTX *ctx),
int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
{
pmeth->keygen_init = keygen_init;
pmeth->keygen = keygen;
}
void
EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
int (*sign_init)(EVP_PKEY_CTX *ctx),
int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
const unsigned char *tbs, size_t tbslen))
{
pmeth->sign_init = sign_init;
pmeth->sign = sign;
}
void
EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
int (*verify_init)(EVP_PKEY_CTX *ctx),
int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
const unsigned char *tbs, size_t tbslen))
{
pmeth->verify_init = verify_init;
pmeth->verify = verify;
}
void
EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
int (*verify_recover)(EVP_PKEY_CTX *ctx,
unsigned char *sig, size_t *siglen,
const unsigned char *tbs, size_t tbslen))
{
pmeth->verify_recover_init = verify_recover_init;
pmeth->verify_recover = verify_recover;
}
void
EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
EVP_MD_CTX *mctx))
{
pmeth->signctx_init = signctx_init;
pmeth->signctx = signctx;
}
void
EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
EVP_MD_CTX *mctx))
{
pmeth->verifyctx_init = verifyctx_init;
pmeth->verifyctx = verifyctx;
}
void
EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
int (*encrypt_init)(EVP_PKEY_CTX *ctx),
int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
const unsigned char *in, size_t inlen))
{
pmeth->encrypt_init = encrypt_init;
pmeth->encrypt = encryptfn;
}
void
EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
int (*decrypt_init)(EVP_PKEY_CTX *ctx),
int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
const unsigned char *in, size_t inlen))
{
pmeth->decrypt_init = decrypt_init;
pmeth->decrypt = decrypt;
}
void
EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
int (*derive_init)(EVP_PKEY_CTX *ctx),
int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
{
pmeth->derive_init = derive_init;
pmeth->derive = derive;
}
void
EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
{
pmeth->ctrl = ctrl;
pmeth->ctrl_str = ctrl_str;
}
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