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- /*
- * Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <openssl/objects.h>
- #include <openssl/evp.h>
- #include "internal/cryptlib.h"
- #include "crypto/evp.h"
- #include "internal/provider.h"
- #include "evp_local.h"
- static int evp_pkey_asym_cipher_init(EVP_PKEY_CTX *ctx, int operation,
- const OSSL_PARAM params[])
- {
- int ret = 0;
- void *provkey = NULL;
- EVP_ASYM_CIPHER *cipher = NULL;
- EVP_KEYMGMT *tmp_keymgmt = NULL;
- const char *supported_ciph = NULL;
- if (ctx == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- evp_pkey_ctx_free_old_ops(ctx);
- ctx->operation = operation;
- /*
- * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
- * calls can be removed.
- */
- ERR_set_mark();
- if (evp_pkey_ctx_is_legacy(ctx))
- goto legacy;
- /*
- * Ensure that the key is provided, either natively, or as a cached export.
- * If not, go legacy
- */
- tmp_keymgmt = ctx->keymgmt;
- provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
- &tmp_keymgmt, ctx->propquery);
- if (provkey == NULL)
- goto legacy;
- if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
- ERR_clear_last_mark();
- ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
- goto err;
- }
- EVP_KEYMGMT_free(ctx->keymgmt);
- ctx->keymgmt = tmp_keymgmt;
- if (ctx->keymgmt->query_operation_name != NULL)
- supported_ciph =
- ctx->keymgmt->query_operation_name(OSSL_OP_ASYM_CIPHER);
- /*
- * If we didn't get a supported ciph, assume there is one with the
- * same name as the key type.
- */
- if (supported_ciph == NULL)
- supported_ciph = ctx->keytype;
- /*
- * Because we cleared out old ops, we shouldn't need to worry about
- * checking if cipher is already there.
- */
- cipher =
- EVP_ASYM_CIPHER_fetch(ctx->libctx, supported_ciph, ctx->propquery);
- if (cipher == NULL
- || (EVP_KEYMGMT_provider(ctx->keymgmt)
- != EVP_ASYM_CIPHER_provider(cipher))) {
- /*
- * We don't need to free ctx->keymgmt here, as it's not necessarily
- * tied to this operation. It will be freed by EVP_PKEY_CTX_free().
- */
- EVP_ASYM_CIPHER_free(cipher);
- goto legacy;
- }
- /*
- * TODO remove this when legacy is gone
- * If we don't have the full support we need with provided methods,
- * let's go see if legacy does.
- */
- ERR_pop_to_mark();
- /* No more legacy from here down to legacy: */
- ctx->op.ciph.cipher = cipher;
- ctx->op.ciph.ciphprovctx = cipher->newctx(ossl_provider_ctx(cipher->prov));
- if (ctx->op.ciph.ciphprovctx == NULL) {
- /* The provider key can stay in the cache */
- ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
- goto err;
- }
- switch (operation) {
- case EVP_PKEY_OP_ENCRYPT:
- if (cipher->encrypt_init == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- ret = -2;
- goto err;
- }
- ret = cipher->encrypt_init(ctx->op.ciph.ciphprovctx, provkey, params);
- break;
- case EVP_PKEY_OP_DECRYPT:
- if (cipher->decrypt_init == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- ret = -2;
- goto err;
- }
- ret = cipher->decrypt_init(ctx->op.ciph.ciphprovctx, provkey, params);
- break;
- default:
- ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
- goto err;
- }
- if (ret <= 0)
- goto err;
- return 1;
- legacy:
- /*
- * TODO remove this when legacy is gone
- * If we don't have the full support we need with provided methods,
- * let's go see if legacy does.
- */
- ERR_pop_to_mark();
- if (ctx->pmeth == NULL || ctx->pmeth->encrypt == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- switch(ctx->operation) {
- case EVP_PKEY_OP_ENCRYPT:
- if (ctx->pmeth->encrypt_init == NULL)
- return 1;
- ret = ctx->pmeth->encrypt_init(ctx);
- break;
- case EVP_PKEY_OP_DECRYPT:
- if (ctx->pmeth->decrypt_init == NULL)
- return 1;
- ret = ctx->pmeth->decrypt_init(ctx);
- break;
- default:
- ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
- ret = -1;
- }
- err:
- if (ret <= 0) {
- evp_pkey_ctx_free_old_ops(ctx);
- ctx->operation = EVP_PKEY_OP_UNDEFINED;
- }
- return ret;
- }
- int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
- {
- return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_ENCRYPT, NULL);
- }
- int EVP_PKEY_encrypt_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
- {
- return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_ENCRYPT, params);
- }
- int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
- unsigned char *out, size_t *outlen,
- const unsigned char *in, size_t inlen)
- {
- int ret;
- if (ctx == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
- return -1;
- }
- if (ctx->op.ciph.ciphprovctx == NULL)
- goto legacy;
- ret = ctx->op.ciph.cipher->encrypt(ctx->op.ciph.ciphprovctx, out, outlen,
- (out == NULL ? 0 : *outlen), in, inlen);
- return ret;
- legacy:
- if (ctx->pmeth == NULL || ctx->pmeth->encrypt == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
- return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
- }
- int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
- {
- return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_DECRYPT, NULL);
- }
- int EVP_PKEY_decrypt_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
- {
- return evp_pkey_asym_cipher_init(ctx, EVP_PKEY_OP_DECRYPT, params);
- }
- int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
- unsigned char *out, size_t *outlen,
- const unsigned char *in, size_t inlen)
- {
- int ret;
- if (ctx == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
- return -1;
- }
- if (ctx->op.ciph.ciphprovctx == NULL)
- goto legacy;
- ret = ctx->op.ciph.cipher->decrypt(ctx->op.ciph.ciphprovctx, out, outlen,
- (out == NULL ? 0 : *outlen), in, inlen);
- return ret;
- legacy:
- if (ctx->pmeth == NULL || ctx->pmeth->decrypt == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
- return -2;
- }
- M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
- return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
- }
- static EVP_ASYM_CIPHER *evp_asym_cipher_new(OSSL_PROVIDER *prov)
- {
- EVP_ASYM_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_ASYM_CIPHER));
- if (cipher == NULL) {
- ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- cipher->lock = CRYPTO_THREAD_lock_new();
- if (cipher->lock == NULL) {
- ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
- OPENSSL_free(cipher);
- return NULL;
- }
- cipher->prov = prov;
- ossl_provider_up_ref(prov);
- cipher->refcnt = 1;
- return cipher;
- }
- static void *evp_asym_cipher_from_algorithm(int name_id,
- const OSSL_ALGORITHM *algodef,
- OSSL_PROVIDER *prov)
- {
- const OSSL_DISPATCH *fns = algodef->implementation;
- EVP_ASYM_CIPHER *cipher = NULL;
- int ctxfncnt = 0, encfncnt = 0, decfncnt = 0;
- int gparamfncnt = 0, sparamfncnt = 0;
- if ((cipher = evp_asym_cipher_new(prov)) == NULL) {
- ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- cipher->name_id = name_id;
- cipher->description = algodef->algorithm_description;
- for (; fns->function_id != 0; fns++) {
- switch (fns->function_id) {
- case OSSL_FUNC_ASYM_CIPHER_NEWCTX:
- if (cipher->newctx != NULL)
- break;
- cipher->newctx = OSSL_FUNC_asym_cipher_newctx(fns);
- ctxfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT:
- if (cipher->encrypt_init != NULL)
- break;
- cipher->encrypt_init = OSSL_FUNC_asym_cipher_encrypt_init(fns);
- encfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_ENCRYPT:
- if (cipher->encrypt != NULL)
- break;
- cipher->encrypt = OSSL_FUNC_asym_cipher_encrypt(fns);
- encfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT:
- if (cipher->decrypt_init != NULL)
- break;
- cipher->decrypt_init = OSSL_FUNC_asym_cipher_decrypt_init(fns);
- decfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_DECRYPT:
- if (cipher->decrypt != NULL)
- break;
- cipher->decrypt = OSSL_FUNC_asym_cipher_decrypt(fns);
- decfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_FREECTX:
- if (cipher->freectx != NULL)
- break;
- cipher->freectx = OSSL_FUNC_asym_cipher_freectx(fns);
- ctxfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_DUPCTX:
- if (cipher->dupctx != NULL)
- break;
- cipher->dupctx = OSSL_FUNC_asym_cipher_dupctx(fns);
- break;
- case OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS:
- if (cipher->get_ctx_params != NULL)
- break;
- cipher->get_ctx_params
- = OSSL_FUNC_asym_cipher_get_ctx_params(fns);
- gparamfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS:
- if (cipher->gettable_ctx_params != NULL)
- break;
- cipher->gettable_ctx_params
- = OSSL_FUNC_asym_cipher_gettable_ctx_params(fns);
- gparamfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS:
- if (cipher->set_ctx_params != NULL)
- break;
- cipher->set_ctx_params
- = OSSL_FUNC_asym_cipher_set_ctx_params(fns);
- sparamfncnt++;
- break;
- case OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS:
- if (cipher->settable_ctx_params != NULL)
- break;
- cipher->settable_ctx_params
- = OSSL_FUNC_asym_cipher_settable_ctx_params(fns);
- sparamfncnt++;
- break;
- }
- }
- if (ctxfncnt != 2
- || (encfncnt != 0 && encfncnt != 2)
- || (decfncnt != 0 && decfncnt != 2)
- || (encfncnt != 2 && decfncnt != 2)
- || (gparamfncnt != 0 && gparamfncnt != 2)
- || (sparamfncnt != 0 && sparamfncnt != 2)) {
- /*
- * In order to be a consistent set of functions we must have at least
- * a set of context functions (newctx and freectx) as well as a pair of
- * "cipher" functions: (encrypt_init, encrypt) or
- * (decrypt_init decrypt). set_ctx_params and settable_ctx_params are
- * optional, but if one of them is present then the other one must also
- * be present. The same applies to get_ctx_params and
- * gettable_ctx_params. The dupctx function is optional.
- */
- ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
- goto err;
- }
- return cipher;
- err:
- EVP_ASYM_CIPHER_free(cipher);
- return NULL;
- }
- void EVP_ASYM_CIPHER_free(EVP_ASYM_CIPHER *cipher)
- {
- if (cipher != NULL) {
- int i;
- CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
- if (i > 0)
- return;
- ossl_provider_free(cipher->prov);
- CRYPTO_THREAD_lock_free(cipher->lock);
- OPENSSL_free(cipher);
- }
- }
- int EVP_ASYM_CIPHER_up_ref(EVP_ASYM_CIPHER *cipher)
- {
- int ref = 0;
- CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
- return 1;
- }
- OSSL_PROVIDER *EVP_ASYM_CIPHER_provider(const EVP_ASYM_CIPHER *cipher)
- {
- return cipher->prov;
- }
- EVP_ASYM_CIPHER *EVP_ASYM_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
- const char *properties)
- {
- return evp_generic_fetch(ctx, OSSL_OP_ASYM_CIPHER, algorithm, properties,
- evp_asym_cipher_from_algorithm,
- (int (*)(void *))EVP_ASYM_CIPHER_up_ref,
- (void (*)(void *))EVP_ASYM_CIPHER_free);
- }
- int EVP_ASYM_CIPHER_is_a(const EVP_ASYM_CIPHER *cipher, const char *name)
- {
- return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
- }
- int EVP_ASYM_CIPHER_number(const EVP_ASYM_CIPHER *cipher)
- {
- return cipher->name_id;
- }
- const char *EVP_ASYM_CIPHER_description(const EVP_ASYM_CIPHER *cipher)
- {
- return cipher->description;
- }
- void EVP_ASYM_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
- void (*fn)(EVP_ASYM_CIPHER *cipher,
- void *arg),
- void *arg)
- {
- evp_generic_do_all(libctx, OSSL_OP_ASYM_CIPHER,
- (void (*)(void *, void *))fn, arg,
- evp_asym_cipher_from_algorithm,
- (void (*)(void *))EVP_ASYM_CIPHER_free);
- }
- int EVP_ASYM_CIPHER_names_do_all(const EVP_ASYM_CIPHER *cipher,
- void (*fn)(const char *name, void *data),
- void *data)
- {
- if (cipher->prov != NULL)
- return evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
- return 1;
- }
- const OSSL_PARAM *EVP_ASYM_CIPHER_gettable_ctx_params(const EVP_ASYM_CIPHER *cip)
- {
- void *provctx;
- if (cip == NULL || cip->gettable_ctx_params == NULL)
- return NULL;
- provctx = ossl_provider_ctx(EVP_ASYM_CIPHER_provider(cip));
- return cip->gettable_ctx_params(NULL, provctx);
- }
- const OSSL_PARAM *EVP_ASYM_CIPHER_settable_ctx_params(const EVP_ASYM_CIPHER *cip)
- {
- void *provctx;
- if (cip == NULL || cip->settable_ctx_params == NULL)
- return NULL;
- provctx = ossl_provider_ctx(EVP_ASYM_CIPHER_provider(cip));
- return cip->settable_ctx_params(NULL, provctx);
- }
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