-/* crypto/evp/evp_enc.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * 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
*/
+/* We need to use some engine deprecated APIs */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
#include <stdio.h>
-#include "cryptlib.h"
+#include <limits.h>
+#include <assert.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/rand.h>
-#ifndef OPENSSL_NO_ENGINE
+#ifndef FIPS_MODULE
# include <openssl/engine.h>
#endif
-#include "evp_locl.h"
+#include <openssl/params.h>
+#include <openssl/core_names.h>
+#include "internal/cryptlib.h"
+#include "internal/provider.h"
+#include "internal/core.h"
+#include "internal/safe_math.h"
+#include "crypto/evp.h"
+#include "evp_local.h"
-const char EVP_version[] = "EVP" OPENSSL_VERSION_PTEXT;
+OSSL_SAFE_MATH_SIGNED(int, int)
-void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
+int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
{
+ if (ctx == NULL)
+ return 1;
+
+ if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
+ goto legacy;
+
+ if (ctx->algctx != NULL) {
+ if (ctx->cipher->freectx != NULL)
+ ctx->cipher->freectx(ctx->algctx);
+ ctx->algctx = NULL;
+ }
+ if (ctx->fetched_cipher != NULL)
+ EVP_CIPHER_free(ctx->fetched_cipher);
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->iv_len = -1;
+
+ return 1;
+
+ /* Remove legacy code below when legacy support is removed. */
+ legacy:
+
+ if (ctx->cipher != NULL) {
+ if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
+ return 0;
+ /* Cleanse cipher context data */
+ if (ctx->cipher_data && ctx->cipher->ctx_size)
+ OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
+ }
+ OPENSSL_free(ctx->cipher_data);
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
+ ENGINE_finish(ctx->engine);
+#endif
memset(ctx, 0, sizeof(*ctx));
+ ctx->iv_len = -1;
+ return 1;
}
EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
{
- EVP_CIPHER_CTX *ctx = OPENSSL_malloc(sizeof(*ctx));
- if (ctx)
- EVP_CIPHER_CTX_init(ctx);
+ EVP_CIPHER_CTX *ctx;
+
+ ctx = OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
+ if (ctx == NULL)
+ return NULL;
+
+ ctx->iv_len = -1;
return ctx;
}
-int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
- const unsigned char *key, const unsigned char *iv, int enc)
+void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
{
- if (cipher)
- EVP_CIPHER_CTX_init(ctx);
- return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
+ if (ctx == NULL)
+ return;
+ EVP_CIPHER_CTX_reset(ctx);
+ OPENSSL_free(ctx);
}
-int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
- ENGINE *impl, const unsigned char *key,
- const unsigned char *iv, int enc)
+static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
+ const EVP_CIPHER *cipher,
+ ENGINE *impl, const unsigned char *key,
+ const unsigned char *iv, int enc,
+ const OSSL_PARAM params[])
{
- if (enc == -1)
+ int n;
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
+ ENGINE *tmpimpl = NULL;
+#endif
+
+ /*
+ * enc == 1 means we are encrypting.
+ * enc == 0 means we are decrypting.
+ * enc == -1 means, use the previously initialised value for encrypt/decrypt
+ */
+ if (enc == -1) {
enc = ctx->encrypt;
- else {
+ } else {
if (enc)
enc = 1;
ctx->encrypt = enc;
}
-#ifndef OPENSSL_NO_ENGINE
+
+ if (cipher == NULL && ctx->cipher == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+
+ /* Code below to be removed when legacy support is dropped. */
+
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
/*
* Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
* this context may already have an ENGINE! Try to avoid releasing the
* previous handle, re-querying for an ENGINE, and having a
- * reinitialisation, when it may all be unecessary.
+ * reinitialisation, when it may all be unnecessary.
*/
- if (ctx->engine && ctx->cipher && (!cipher ||
- (cipher
- && (cipher->nid ==
- ctx->cipher->nid))))
+ if (ctx->engine && ctx->cipher
+ && (cipher == NULL || cipher->nid == ctx->cipher->nid))
goto skip_to_init;
+
+ if (cipher != NULL && impl == NULL) {
+ /* Ask if an ENGINE is reserved for this job */
+ tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
+ }
#endif
- if (cipher) {
+
+ /*
+ * If there are engines involved then we should use legacy handling for now.
+ */
+ if (ctx->engine != NULL
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
+ || tmpimpl != NULL
+#endif
+ || impl != NULL
+ || (cipher != NULL && cipher->origin == EVP_ORIG_METH)
+ || (cipher == NULL && ctx->cipher != NULL
+ && ctx->cipher->origin == EVP_ORIG_METH)) {
+ if (ctx->cipher == ctx->fetched_cipher)
+ ctx->cipher = NULL;
+ EVP_CIPHER_free(ctx->fetched_cipher);
+ ctx->fetched_cipher = NULL;
+ goto legacy;
+ }
+ /*
+ * Ensure a context left lying around from last time is cleared
+ * (legacy code)
+ */
+ if (cipher != NULL && ctx->cipher != NULL) {
+ if (ctx->cipher->cleanup != NULL && !ctx->cipher->cleanup(ctx))
+ return 0;
+ OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
+ ctx->cipher_data = NULL;
+ }
+
+ /* Start of non-legacy code below */
+
+ /* Ensure a context left lying around from last time is cleared */
+ if (cipher != NULL && ctx->cipher != NULL) {
+ unsigned long flags = ctx->flags;
+
+ EVP_CIPHER_CTX_reset(ctx);
+ /* Restore encrypt and flags */
+ ctx->encrypt = enc;
+ ctx->flags = flags;
+ }
+
+ if (cipher == NULL)
+ cipher = ctx->cipher;
+
+ if (cipher->prov == NULL) {
+#ifdef FIPS_MODULE
+ /* We only do explicit fetches inside the FIPS module */
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+#else
+ EVP_CIPHER *provciph =
+ EVP_CIPHER_fetch(NULL,
+ cipher->nid == NID_undef ? "NULL"
+ : OBJ_nid2sn(cipher->nid),
+ "");
+
+ if (provciph == NULL)
+ return 0;
+ cipher = provciph;
+ EVP_CIPHER_free(ctx->fetched_cipher);
+ ctx->fetched_cipher = provciph;
+#endif
+ }
+
+ if (!ossl_assert(cipher->prov != NULL)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+
+ if (cipher != ctx->fetched_cipher) {
+ if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ EVP_CIPHER_free(ctx->fetched_cipher);
+ /* Coverity false positive, the reference counting is confusing it */
+ /* coverity[use_after_free] */
+ ctx->fetched_cipher = (EVP_CIPHER *)cipher;
+ }
+ ctx->cipher = cipher;
+ if (ctx->algctx == NULL) {
+ ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
+ if (ctx->algctx == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ }
+
+ if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
+ /*
+ * If this ctx was already set up for no padding then we need to tell
+ * the new cipher about it.
+ */
+ if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
+ return 0;
+ }
+
+#ifndef FIPS_MODULE
+ /*
+ * Fix for CVE-2023-5363
+ * Passing in a size as part of the init call takes effect late
+ * so, force such to occur before the initialisation.
+ *
+ * The FIPS provider's internal library context is used in a manner
+ * such that this is not an issue.
+ */
+ if (params != NULL) {
+ OSSL_PARAM param_lens[3] = { OSSL_PARAM_END, OSSL_PARAM_END,
+ OSSL_PARAM_END };
+ OSSL_PARAM *q = param_lens;
+ const OSSL_PARAM *p;
+
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
+ if (p != NULL)
+ memcpy(q++, p, sizeof(*q));
+
+ /*
+ * Note that OSSL_CIPHER_PARAM_AEAD_IVLEN is a synonym for
+ * OSSL_CIPHER_PARAM_IVLEN so both are covered here.
+ */
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
+ if (p != NULL)
+ memcpy(q++, p, sizeof(*q));
+
+ if (q != param_lens) {
+ if (!EVP_CIPHER_CTX_set_params(ctx, param_lens)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_LENGTH);
+ return 0;
+ }
+ }
+ }
+#endif
+
+ if (enc) {
+ if (ctx->cipher->einit == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+
+ return ctx->cipher->einit(ctx->algctx,
+ key,
+ key == NULL ? 0
+ : EVP_CIPHER_CTX_get_key_length(ctx),
+ iv,
+ iv == NULL ? 0
+ : EVP_CIPHER_CTX_get_iv_length(ctx),
+ params);
+ }
+
+ if (ctx->cipher->dinit == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+
+ return ctx->cipher->dinit(ctx->algctx,
+ key,
+ key == NULL ? 0
+ : EVP_CIPHER_CTX_get_key_length(ctx),
+ iv,
+ iv == NULL ? 0
+ : EVP_CIPHER_CTX_get_iv_length(ctx),
+ params);
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
+
+ if (cipher != NULL) {
/*
- * Ensure a context left lying around from last time is cleared (the
- * previous check attempted to avoid this if the same ENGINE and
+ * Ensure a context left lying around from last time is cleared (we
+ * previously attempted to avoid this if the same ENGINE and
* EVP_CIPHER could be used).
*/
if (ctx->cipher) {
unsigned long flags = ctx->flags;
- EVP_CIPHER_CTX_cleanup(ctx);
+ EVP_CIPHER_CTX_reset(ctx);
/* Restore encrypt and flags */
ctx->encrypt = enc;
ctx->flags = flags;
}
-#ifndef OPENSSL_NO_ENGINE
- if (impl) {
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
+ if (impl != NULL) {
if (!ENGINE_init(impl)) {
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
- } else
- /* Ask if an ENGINE is reserved for this job */
- impl = ENGINE_get_cipher_engine(cipher->nid);
- if (impl) {
+ } else {
+ impl = tmpimpl;
+ }
+ if (impl != NULL) {
/* There's an ENGINE for this job ... (apparently) */
const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
- if (!c) {
+
+ if (c == NULL) {
/*
* One positive side-effect of US's export control history,
* is that we should at least be able to avoid using US
- * mispellings of "initialisation"?
+ * misspellings of "initialisation"?
*/
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
/* We'll use the ENGINE's private cipher definition */
* from an ENGINE and we need to release it when done.
*/
ctx->engine = impl;
- } else
+ } else {
ctx->engine = NULL;
+ }
#endif
ctx->cipher = cipher;
if (ctx->cipher->ctx_size) {
- ctx->cipher_data = OPENSSL_malloc(ctx->cipher->ctx_size);
- if (!ctx->cipher_data) {
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
+ ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
+ if (ctx->cipher_data == NULL) {
+ ctx->cipher = NULL;
return 0;
}
} else {
/* Preserve wrap enable flag, zero everything else */
ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
- if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) {
+ ctx->cipher = NULL;
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
}
- } else if (!ctx->cipher) {
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
- return 0;
}
-#ifndef OPENSSL_NO_ENGINE
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
skip_to_init:
#endif
+ if (ctx->cipher == NULL)
+ return 0;
+
/* we assume block size is a power of 2 in *cryptUpdate */
OPENSSL_assert(ctx->cipher->block_size == 1
|| ctx->cipher->block_size == 8
|| ctx->cipher->block_size == 16);
if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
- && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
- EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
+ && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
return 0;
}
- if (!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
- switch (EVP_CIPHER_CTX_mode(ctx)) {
+ if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
+ & EVP_CIPH_CUSTOM_IV) == 0) {
+ switch (EVP_CIPHER_CTX_get_mode(ctx)) {
case EVP_CIPH_STREAM_CIPHER:
case EVP_CIPH_ECB_MODE:
/* fall-through */
case EVP_CIPH_CBC_MODE:
-
- OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
- (int)sizeof(ctx->iv));
- if (iv)
- memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
- memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
+ n = EVP_CIPHER_CTX_get_iv_length(ctx);
+ if (n < 0 || n > (int)sizeof(ctx->iv)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
+ return 0;
+ }
+ if (iv != NULL)
+ memcpy(ctx->oiv, iv, n);
+ memcpy(ctx->iv, ctx->oiv, n);
break;
case EVP_CIPH_CTR_MODE:
ctx->num = 0;
/* Don't reuse IV for CTR mode */
- if (iv)
- memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
+ if (iv != NULL) {
+ n = EVP_CIPHER_CTX_get_iv_length(ctx);
+ if (n <= 0 || n > (int)sizeof(ctx->iv)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
+ return 0;
+ }
+ memcpy(ctx->iv, iv, n);
+ }
break;
default:
}
}
- if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
+ if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
if (!ctx->cipher->init(ctx, key, iv, enc))
return 0;
}
return 1;
}
+int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ const unsigned char *key, const unsigned char *iv,
+ int enc, const OSSL_PARAM params[])
+{
+ return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
+}
+
+int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ const unsigned char *key, const unsigned char *iv, int enc)
+{
+ if (cipher != NULL)
+ EVP_CIPHER_CTX_reset(ctx);
+ return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
+}
+
+int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ ENGINE *impl, const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
+}
+
int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
}
+int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ const unsigned char *key, const unsigned char *iv,
+ const OSSL_PARAM params[])
+{
+ return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
+}
+
int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const unsigned char *key, const unsigned char *iv)
{
return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
}
-int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
- const unsigned char *in, int inl)
+int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
+ const unsigned char *key, const unsigned char *iv,
+ const OSSL_PARAM params[])
{
- int i, j, bl;
+ return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
+}
+
+/*
+ * According to the letter of standard difference between pointers
+ * is specified to be valid only within same object. This makes
+ * it formally challenging to determine if input and output buffers
+ * are not partially overlapping with standard pointer arithmetic.
+ */
+#ifdef PTRDIFF_T
+# undef PTRDIFF_T
+#endif
+#if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
+/*
+ * Then we have VMS that distinguishes itself by adhering to
+ * sizeof(size_t)==4 even in 64-bit builds, which means that
+ * difference between two pointers might be truncated to 32 bits.
+ * In the context one can even wonder how comparison for
+ * equality is implemented. To be on the safe side we adhere to
+ * PTRDIFF_T even for comparison for equality.
+ */
+# define PTRDIFF_T uint64_t
+#else
+# define PTRDIFF_T size_t
+#endif
+
+int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
+{
+ PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
+ /*
+ * Check for partially overlapping buffers. [Binary logical
+ * operations are used instead of boolean to minimize number
+ * of conditional branches.]
+ */
+ int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
+ (diff > (0 - (PTRDIFF_T)len)));
+
+ return overlapped;
+}
+
+static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
+ unsigned char *out, int *outl,
+ const unsigned char *in, int inl)
+{
+ int i, j, bl, cmpl = inl;
+
+ if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
+ cmpl = safe_div_round_up_int(cmpl, 8, NULL);
+
+ bl = ctx->cipher->block_size;
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ /* If block size > 1 then the cipher will have to do this check */
+ if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
+ return 0;
+ }
+
i = ctx->cipher->do_cipher(ctx, out, in, inl);
if (i < 0)
return 0;
*outl = 0;
return inl == 0;
}
+ if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
+ return 0;
+ }
if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
}
}
i = ctx->buf_len;
- bl = ctx->cipher->block_size;
OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
if (i != 0) {
- if (i + inl < bl) {
+ if (bl - i > inl) {
memcpy(&(ctx->buf[i]), in, inl);
ctx->buf_len += inl;
*outl = 0;
return 1;
} else {
j = bl - i;
- memcpy(&(ctx->buf[i]), in, j);
- if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
+
+ /*
+ * Once we've processed the first j bytes from in, the amount of
+ * data left that is a multiple of the block length is:
+ * (inl - j) & ~(bl - 1)
+ * We must ensure that this amount of data, plus the one block that
+ * we process from ctx->buf does not exceed INT_MAX
+ */
+ if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
return 0;
+ }
+ memcpy(&(ctx->buf[i]), in, j);
inl -= j;
in += j;
+ if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
+ return 0;
out += bl;
*outl = bl;
}
return 1;
}
+
+int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
+ const unsigned char *in, int inl)
+{
+ int ret;
+ size_t soutl, inl_ = (size_t)inl;
+ int blocksize;
+
+ if (ossl_likely(outl != NULL)) {
+ *outl = 0;
+ } else {
+ ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ /* Prevent accidental use of decryption context when encrypting */
+ if (ossl_unlikely(!ctx->encrypt)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
+ return 0;
+ }
+
+ if (ossl_unlikely(ctx->cipher == NULL)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+
+ if (ossl_unlikely(ctx->cipher->prov == NULL))
+ goto legacy;
+
+ blocksize = ctx->cipher->block_size;
+
+ if (ossl_unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
+ return 0;
+ }
+
+ ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
+ inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
+ in, inl_);
+
+ if (ossl_likely(ret)) {
+ if (soutl > INT_MAX) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
+ return 0;
+ }
+ *outl = soutl;
+ }
+
+ return ret;
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
+
+ return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
+}
+
int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
{
int ret;
{
int n, ret;
unsigned int i, b, bl;
+ size_t soutl;
+ int blocksize;
+
+ if (outl != NULL) {
+ *outl = 0;
+ } else {
+ ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ /* Prevent accidental use of decryption context when encrypting */
+ if (!ctx->encrypt) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
+ return 0;
+ }
+
+ if (ctx->cipher == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+ if (ctx->cipher->prov == NULL)
+ goto legacy;
+
+ blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
+
+ if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
+ return 0;
+ }
+
+ ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
+ blocksize == 1 ? 0 : blocksize);
+
+ if (ret) {
+ if (soutl > INT_MAX) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
+ return 0;
+ }
+ *outl = soutl;
+ }
+
+ return ret;
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
}
b = ctx->cipher->block_size;
- OPENSSL_assert(b <= sizeof ctx->buf);
+ OPENSSL_assert(b <= sizeof(ctx->buf));
if (b == 1) {
*outl = 0;
return 1;
bl = ctx->buf_len;
if (ctx->flags & EVP_CIPH_NO_PADDING) {
if (bl) {
- EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
- EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
const unsigned char *in, int inl)
{
- int fix_len;
+ int fix_len, cmpl = inl, ret;
unsigned int b;
+ size_t soutl, inl_ = (size_t)inl;
+ int blocksize;
+
+ if (ossl_likely(outl != NULL)) {
+ *outl = 0;
+ } else {
+ ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ /* Prevent accidental use of encryption context when decrypting */
+ if (ossl_unlikely(ctx->encrypt)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
+ return 0;
+ }
+
+ if (ossl_unlikely(ctx->cipher == NULL)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+ if (ossl_unlikely(ctx->cipher->prov == NULL))
+ goto legacy;
+
+ blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
+
+ if (ossl_unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
+ return 0;
+ }
+ ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
+ inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
+ in, inl_);
+
+ if (ossl_likely(ret)) {
+ if (soutl > INT_MAX) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
+ return 0;
+ }
+ *outl = soutl;
+ }
+
+ return ret;
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
+
+ b = ctx->cipher->block_size;
+
+ if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
+ cmpl = safe_div_round_up_int(cmpl, 8, NULL);
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
+ if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
+ return 0;
+ }
+
fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
if (fix_len < 0) {
*outl = 0;
}
if (ctx->flags & EVP_CIPH_NO_PADDING)
- return EVP_EncryptUpdate(ctx, out, outl, in, inl);
+ return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
- b = ctx->cipher->block_size;
- OPENSSL_assert(b <= sizeof ctx->final);
+ OPENSSL_assert(b <= sizeof(ctx->final));
if (ctx->final_used) {
+ /* see comment about PTRDIFF_T comparison above */
+ if (((PTRDIFF_T)out == (PTRDIFF_T)in)
+ || ossl_is_partially_overlapping(out, in, b)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
+ return 0;
+ }
+ /*
+ * final_used is only ever set if buf_len is 0. Therefore the maximum
+ * length output we will ever see from evp_EncryptDecryptUpdate is
+ * the maximum multiple of the block length that is <= inl, or just:
+ * inl & ~(b - 1)
+ * Since final_used has been set then the final output length is:
+ * (inl & ~(b - 1)) + b
+ * This must never exceed INT_MAX
+ */
+ if ((inl & ~(b - 1)) > INT_MAX - b) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
+ return 0;
+ }
memcpy(out, ctx->final, b);
out += b;
fix_len = 1;
} else
fix_len = 0;
- if (!EVP_EncryptUpdate(ctx, out, outl, in, inl))
+ if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
return 0;
/*
{
int i, n;
unsigned int b;
- *outl = 0;
+ size_t soutl;
+ int ret;
+ int blocksize;
+
+ if (outl != NULL) {
+ *outl = 0;
+ } else {
+ ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ /* Prevent accidental use of encryption context when decrypting */
+ if (ctx->encrypt) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
+ return 0;
+ }
+
+ if (ctx->cipher == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
+ return 0;
+ }
+ if (ctx->cipher->prov == NULL)
+ goto legacy;
+
+ blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
+
+ if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
+ return 0;
+ }
+
+ ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
+ blocksize == 1 ? 0 : blocksize);
+
+ if (ret) {
+ if (soutl > INT_MAX) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
+ return 0;
+ }
+ *outl = soutl;
+ }
+
+ return ret;
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
+
+ *outl = 0;
if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
if (i < 0)
b = ctx->cipher->block_size;
if (ctx->flags & EVP_CIPH_NO_PADDING) {
if (ctx->buf_len) {
- EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
- EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
+ ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
}
if (b > 1) {
if (ctx->buf_len || !ctx->final_used) {
- EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
- return (0);
+ ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
+ return 0;
}
- OPENSSL_assert(b <= sizeof ctx->final);
+ OPENSSL_assert(b <= sizeof(ctx->final));
/*
* The following assumes that the ciphertext has been authenticated.
*/
n = ctx->final[b - 1];
if (n == 0 || n > (int)b) {
- EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
- return (0);
+ ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
+ return 0;
}
for (i = 0; i < n; i++) {
if (ctx->final[--b] != n) {
- EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
- return (0);
+ ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
+ return 0;
}
}
n = ctx->cipher->block_size - n;
for (i = 0; i < n; i++)
out[i] = ctx->final[i];
*outl = n;
- } else
- *outl = 0;
- return (1);
+ }
+ return 1;
}
-void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
{
- EVP_CIPHER_CTX_cleanup(ctx);
- OPENSSL_free(ctx);
-}
+ if (c->cipher->prov != NULL) {
+ int ok;
+ OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
+ size_t len;
-int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
-{
- if (!c)
- return 0;
- if (c->cipher != NULL) {
- if (c->cipher->cleanup && !c->cipher->cleanup(c))
+ if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
+ return 1;
+
+ /* Check the cipher actually understands this parameter */
+ if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
+ OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
return 0;
- /* Cleanse cipher context data */
- if (c->cipher_data)
- OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
+ }
+
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
+ if (!OSSL_PARAM_set_int(params, keylen))
+ return 0;
+ ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
+ if (ok <= 0)
+ return 0;
+ c->key_len = keylen;
+ return 1;
}
- OPENSSL_free(c->cipher_data);
-#ifndef OPENSSL_NO_ENGINE
- if (c->engine)
- /*
- * The EVP_CIPHER we used belongs to an ENGINE, release the
- * functional reference we held for this reason.
- */
- ENGINE_finish(c->engine);
-#endif
- memset(c, 0, sizeof(*c));
- return 1;
-}
-int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
-{
+ /* Code below to be removed when legacy support is dropped. */
+
+ /*
+ * Note there have never been any built-in ciphers that define this flag
+ * since it was first introduced.
+ */
if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
- if (c->key_len == keylen)
+ if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
return 1;
if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
c->key_len = keylen;
return 1;
}
- EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH);
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
return 0;
}
int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
{
+ int ok;
+ OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
+ unsigned int pd = pad;
+
if (pad)
ctx->flags &= ~EVP_CIPH_NO_PADDING;
else
ctx->flags |= EVP_CIPH_NO_PADDING;
- return 1;
+
+ if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
+ return 1;
+ params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
+ ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+
+ return ok != 0;
}
int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
- int ret;
- if (!ctx->cipher) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
+ int ret = EVP_CTRL_RET_UNSUPPORTED;
+ int set_params = 1;
+ size_t sz = arg;
+ unsigned int i;
+ OSSL_PARAM params[4] = {
+ OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
+ };
+
+ if (ctx == NULL || ctx->cipher == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
return 0;
}
- if (!ctx->cipher->ctrl) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
+ if (ctx->cipher->prov == NULL)
+ goto legacy;
+
+ switch (type) {
+ case EVP_CTRL_SET_KEY_LENGTH:
+ if (arg < 0)
+ return 0;
+ if (ctx->key_len == arg)
+ /* Skip calling into provider if unchanged. */
+ return 1;
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
+ ctx->key_len = -1;
+ break;
+ case EVP_CTRL_RAND_KEY: /* Used by DES */
+ set_params = 0;
+ params[0] =
+ OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
+ ptr, sz);
+ break;
+
+ case EVP_CTRL_INIT:
+ /*
+ * EVP_CTRL_INIT is purely legacy, no provider counterpart.
+ * As a matter of fact, this should be dead code, but some caller
+ * might still do a direct control call with this command, so...
+ * Legacy methods return 1 except for exceptional circumstances, so
+ * we do the same here to not be disruptive.
+ */
+ return 1;
+ case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
+ default:
+ goto end;
+ case EVP_CTRL_AEAD_SET_IVLEN:
+ if (arg < 0)
+ return 0;
+ if (ctx->iv_len == arg)
+ /* Skip calling into provider if unchanged. */
+ return 1;
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
+ ctx->iv_len = -1;
+ break;
+ case EVP_CTRL_CCM_SET_L:
+ if (arg < 2 || arg > 8)
+ return 0;
+ sz = 15 - arg;
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
+ ctx->iv_len = -1;
+ break;
+ case EVP_CTRL_AEAD_SET_IV_FIXED:
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
+ break;
+ case EVP_CTRL_GCM_IV_GEN:
+ set_params = 0;
+ if (arg < 0)
+ sz = 0; /* special case that uses the iv length */
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
+ break;
+ case EVP_CTRL_GCM_SET_IV_INV:
+ if (arg < 0)
+ return 0;
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
+ break;
+ case EVP_CTRL_GET_RC5_ROUNDS:
+ set_params = 0; /* Fall thru */
+ case EVP_CTRL_SET_RC5_ROUNDS:
+ if (arg < 0)
+ return 0;
+ i = (unsigned int)arg;
+ params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
+ break;
+ case EVP_CTRL_SET_SPEED:
+ if (arg < 0)
+ return 0;
+ i = (unsigned int)arg;
+ params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
+ break;
+ case EVP_CTRL_AEAD_GET_TAG:
+ set_params = 0; /* Fall thru */
+ case EVP_CTRL_AEAD_SET_TAG:
+ params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
+ ptr, sz);
+ break;
+ case EVP_CTRL_AEAD_TLS1_AAD:
+ /* This one does a set and a get - since it returns a size */
+ params[0] =
+ OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
+ ptr, sz);
+ ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ goto end;
+ params[0] =
+ OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
+ ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ goto end;
+ return sz;
+#ifndef OPENSSL_NO_RC2
+ case EVP_CTRL_GET_RC2_KEY_BITS:
+ set_params = 0; /* Fall thru */
+ case EVP_CTRL_SET_RC2_KEY_BITS:
+ params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
+ break;
+#endif /* OPENSSL_NO_RC2 */
+#if !defined(OPENSSL_NO_MULTIBLOCK)
+ case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
+ params[0] = OSSL_PARAM_construct_size_t(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
+ ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return 0;
+
+ params[0] = OSSL_PARAM_construct_size_t(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
+ params[1] = OSSL_PARAM_construct_end();
+ ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return 0;
+ return sz;
+ case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
+ EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
+ (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
+
+ if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
+ return 0;
+
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
+ params[1] = OSSL_PARAM_construct_uint(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
+ ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return ret;
+ /* Retrieve the return values changed by the set */
+ params[0] = OSSL_PARAM_construct_size_t(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
+ params[1] = OSSL_PARAM_construct_uint(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
+ params[2] = OSSL_PARAM_construct_end();
+ ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return 0;
+ return sz;
+ }
+ case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
+ EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
+ (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
+
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
+
+ params[1] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
+ p->len);
+ params[2] = OSSL_PARAM_construct_uint(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
+ ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return ret;
+ params[0] = OSSL_PARAM_construct_size_t(
+ OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
+ params[1] = OSSL_PARAM_construct_end();
+ ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
+ if (ret <= 0)
+ return 0;
+ return sz;
+ }
+#endif /* OPENSSL_NO_MULTIBLOCK */
+ case EVP_CTRL_AEAD_SET_MAC_KEY:
+ if (arg < 0)
+ return -1;
+ params[0] = OSSL_PARAM_construct_octet_string(
+ OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
+ break;
+ }
+
+ if (set_params)
+ ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
+ else
+ ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
+ goto end;
+
+ /* Code below to be removed when legacy support is dropped. */
+legacy:
+ if (ctx->cipher->ctrl == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
return 0;
}
ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
- if (ret == -1) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL,
- EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
+
+ end:
+ if (ret == EVP_CTRL_RET_UNSUPPORTED) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
return 0;
}
return ret;
}
+int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
+{
+ if (cipher != NULL && cipher->get_params != NULL)
+ return cipher->get_params(params);
+ return 0;
+}
+
+int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
+{
+ int r = 0;
+ const OSSL_PARAM *p;
+
+ if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) {
+ r = ctx->cipher->set_ctx_params(ctx->algctx, params);
+ if (r > 0) {
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
+ if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) {
+ r = 0;
+ ctx->key_len = -1;
+ }
+ }
+ if (r > 0) {
+ p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
+ if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) {
+ r = 0;
+ ctx->iv_len = -1;
+ }
+ }
+ }
+ return r;
+}
+
+int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
+{
+ if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
+ return ctx->cipher->get_ctx_params(ctx->algctx, params);
+ return 0;
+}
+
+const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
+{
+ if (cipher != NULL && cipher->gettable_params != NULL)
+ return cipher->gettable_params(
+ ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
+ return NULL;
+}
+
+const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
+{
+ void *provctx;
+
+ if (cipher != NULL && cipher->settable_ctx_params != NULL) {
+ provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
+ return cipher->settable_ctx_params(NULL, provctx);
+ }
+ return NULL;
+}
+
+const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
+{
+ void *provctx;
+
+ if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
+ provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
+ return cipher->gettable_ctx_params(NULL, provctx);
+ }
+ return NULL;
+}
+
+const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
+{
+ void *alg;
+
+ if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
+ alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
+ return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
+ }
+ return NULL;
+}
+
+const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
+{
+ void *provctx;
+
+ if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
+ provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
+ return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
+ }
+ return NULL;
+}
+
+#ifndef FIPS_MODULE
+static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
+{
+ const EVP_CIPHER *cipher = ctx->cipher;
+ const OSSL_PROVIDER *prov;
+
+ if (cipher == NULL)
+ return NULL;
+
+ prov = EVP_CIPHER_get0_provider(cipher);
+ return ossl_provider_libctx(prov);
+}
+#endif
+
int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
{
if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
- if (RAND_bytes(key, ctx->key_len) <= 0)
- return 0;
- return 1;
+
+#ifdef FIPS_MODULE
+ return 0;
+#else
+ {
+ int kl;
+ OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
+
+ kl = EVP_CIPHER_CTX_get_key_length(ctx);
+ if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
+ return 0;
+ return 1;
+ }
+#endif /* FIPS_MODULE */
+}
+
+EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
+{
+ EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
+
+ if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
+ EVP_CIPHER_CTX_free(out);
+ out = NULL;
+ }
+ return out;
}
int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
{
if ((in == NULL) || (in->cipher == NULL)) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED);
+ ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
+ return 0;
+ }
+
+ if (in->cipher->prov == NULL)
+ goto legacy;
+
+ if (in->cipher->dupctx == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
+ return 0;
+ }
+
+ EVP_CIPHER_CTX_reset(out);
+
+ *out = *in;
+ out->algctx = NULL;
+
+ if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
+ out->fetched_cipher = NULL;
+ return 0;
+ }
+
+ out->algctx = in->cipher->dupctx(in->algctx);
+ if (out->algctx == NULL) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
return 0;
}
-#ifndef OPENSSL_NO_ENGINE
+
+ return 1;
+
+ /* Code below to be removed when legacy support is dropped. */
+ legacy:
+
+#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
/* Make sure it's safe to copy a cipher context using an ENGINE */
if (in->engine && !ENGINE_init(in->engine)) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB);
+ ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
return 0;
}
#endif
- EVP_CIPHER_CTX_cleanup(out);
+ EVP_CIPHER_CTX_reset(out);
memcpy(out, in, sizeof(*out));
if (in->cipher_data && in->cipher->ctx_size) {
out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
- if (!out->cipher_data) {
- EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
+ if (out->cipher_data == NULL) {
+ out->cipher = NULL;
return 0;
}
memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
}
if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
- return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out);
+ if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
+ out->cipher = NULL;
+ ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ return 1;
+}
+
+EVP_CIPHER *evp_cipher_new(void)
+{
+ EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
+
+ if (cipher != NULL && !CRYPTO_NEW_REF(&cipher->refcnt, 1)) {
+ OPENSSL_free(cipher);
+ return NULL;
+ }
+ return cipher;
+}
+
+/*
+ * FIPS module note: since internal fetches will be entirely
+ * provider based, we know that none of its code depends on legacy
+ * NIDs or any functionality that use them.
+ */
+#ifndef FIPS_MODULE
+/* After removal of legacy support get rid of the need for legacy NIDs */
+static void set_legacy_nid(const char *name, void *vlegacy_nid)
+{
+ int nid;
+ int *legacy_nid = vlegacy_nid;
+ /*
+ * We use lowest level function to get the associated method, because
+ * higher level functions such as EVP_get_cipherbyname() have changed
+ * to look at providers too.
+ */
+ const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
+
+ if (*legacy_nid == -1) /* We found a clash already */
+ return;
+ if (legacy_method == NULL)
+ return;
+ nid = EVP_CIPHER_get_nid(legacy_method);
+ if (*legacy_nid != NID_undef && *legacy_nid != nid) {
+ *legacy_nid = -1;
+ return;
+ }
+ *legacy_nid = nid;
+}
+#endif
+
+static void *evp_cipher_from_algorithm(const int name_id,
+ const OSSL_ALGORITHM *algodef,
+ OSSL_PROVIDER *prov)
+{
+ const OSSL_DISPATCH *fns = algodef->implementation;
+ EVP_CIPHER *cipher = NULL;
+ int fnciphcnt = 0, fnctxcnt = 0;
+
+ if ((cipher = evp_cipher_new()) == NULL) {
+ ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
+ return NULL;
+ }
+
+#ifndef FIPS_MODULE
+ cipher->nid = NID_undef;
+ if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
+ || cipher->nid == -1) {
+ ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
+ EVP_CIPHER_free(cipher);
+ return NULL;
+ }
+#endif
+
+ cipher->name_id = name_id;
+ if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
+ EVP_CIPHER_free(cipher);
+ return NULL;
+ }
+ cipher->description = algodef->algorithm_description;
+
+ for (; fns->function_id != 0; fns++) {
+ switch (fns->function_id) {
+ case OSSL_FUNC_CIPHER_NEWCTX:
+ if (cipher->newctx != NULL)
+ break;
+ cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
+ fnctxcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
+ if (cipher->einit != NULL)
+ break;
+ cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
+ fnciphcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_DECRYPT_INIT:
+ if (cipher->dinit != NULL)
+ break;
+ cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
+ fnciphcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_UPDATE:
+ if (cipher->cupdate != NULL)
+ break;
+ cipher->cupdate = OSSL_FUNC_cipher_update(fns);
+ fnciphcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_FINAL:
+ if (cipher->cfinal != NULL)
+ break;
+ cipher->cfinal = OSSL_FUNC_cipher_final(fns);
+ fnciphcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_CIPHER:
+ if (cipher->ccipher != NULL)
+ break;
+ cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
+ break;
+ case OSSL_FUNC_CIPHER_FREECTX:
+ if (cipher->freectx != NULL)
+ break;
+ cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
+ fnctxcnt++;
+ break;
+ case OSSL_FUNC_CIPHER_DUPCTX:
+ if (cipher->dupctx != NULL)
+ break;
+ cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
+ break;
+ case OSSL_FUNC_CIPHER_GET_PARAMS:
+ if (cipher->get_params != NULL)
+ break;
+ cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
+ break;
+ case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
+ if (cipher->get_ctx_params != NULL)
+ break;
+ cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
+ break;
+ case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
+ if (cipher->set_ctx_params != NULL)
+ break;
+ cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
+ break;
+ case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
+ if (cipher->gettable_params != NULL)
+ break;
+ cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
+ break;
+ case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
+ if (cipher->gettable_ctx_params != NULL)
+ break;
+ cipher->gettable_ctx_params =
+ OSSL_FUNC_cipher_gettable_ctx_params(fns);
+ break;
+ case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
+ if (cipher->settable_ctx_params != NULL)
+ break;
+ cipher->settable_ctx_params =
+ OSSL_FUNC_cipher_settable_ctx_params(fns);
+ break;
+ }
+ }
+ if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
+ || (fnciphcnt == 0 && cipher->ccipher == NULL)
+ || fnctxcnt != 2) {
+ /*
+ * In order to be a consistent set of functions we must have at least
+ * a complete set of "encrypt" functions, or a complete set of "decrypt"
+ * functions, or a single "cipher" function. In all cases we need both
+ * the "newctx" and "freectx" functions.
+ */
+ EVP_CIPHER_free(cipher);
+ ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
+ return NULL;
+ }
+ cipher->prov = prov;
+ if (prov != NULL)
+ ossl_provider_up_ref(prov);
+
+ if (!evp_cipher_cache_constants(cipher)) {
+ EVP_CIPHER_free(cipher);
+ ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
+ cipher = NULL;
+ }
+
+ return cipher;
+}
+
+static int evp_cipher_up_ref(void *cipher)
+{
+ return EVP_CIPHER_up_ref(cipher);
+}
+
+static void evp_cipher_free(void *cipher)
+{
+ EVP_CIPHER_free(cipher);
+}
+
+EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
+ const char *properties)
+{
+ EVP_CIPHER *cipher =
+ evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
+ evp_cipher_from_algorithm, evp_cipher_up_ref,
+ evp_cipher_free);
+
+ return cipher;
+}
+
+int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
+{
+ int ref = 0;
+
+ if (cipher->origin == EVP_ORIG_DYNAMIC)
+ CRYPTO_UP_REF(&cipher->refcnt, &ref);
return 1;
}
+
+void evp_cipher_free_int(EVP_CIPHER *cipher)
+{
+ OPENSSL_free(cipher->type_name);
+ ossl_provider_free(cipher->prov);
+ CRYPTO_FREE_REF(&cipher->refcnt);
+ OPENSSL_free(cipher);
+}
+
+void EVP_CIPHER_free(EVP_CIPHER *cipher)
+{
+ int i;
+
+ if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
+ return;
+
+ CRYPTO_DOWN_REF(&cipher->refcnt, &i);
+ if (i > 0)
+ return;
+ evp_cipher_free_int(cipher);
+}
+
+void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
+ void (*fn)(EVP_CIPHER *mac, void *arg),
+ void *arg)
+{
+ evp_generic_do_all(libctx, OSSL_OP_CIPHER,
+ (void (*)(void *, void *))fn, arg,
+ evp_cipher_from_algorithm, evp_cipher_up_ref,
+ evp_cipher_free);
+}
projects / openssl.git / blobdiff