mirror of
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4e720f12fa
These are both false positives since the `d` array is initialised by the `DES_cfb_encrypt()` call via the `l2cn` macro. Rather than ignoring them and having them crop up later, it's easier to just add an initialiser. Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com> Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> (Merged from https://github.com/openssl/openssl/pull/17894)
427 lines
14 KiB
C
427 lines
14 KiB
C
/*
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* Copyright 1995-2021 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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* DES low level APIs are deprecated for public use, but still ok for internal
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* 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 "internal/cryptlib.h"
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#ifndef OPENSSL_NO_DES
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# include <openssl/objects.h>
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# include "crypto/evp.h"
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# include "crypto/sha.h"
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# include <openssl/des.h>
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# include <openssl/rand.h>
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# include "evp_local.h"
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typedef struct {
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union {
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OSSL_UNION_ALIGN;
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DES_key_schedule ks[3];
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} ks;
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union {
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void (*cbc) (const void *, void *, size_t,
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const DES_key_schedule *, unsigned char *);
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} stream;
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} DES_EDE_KEY;
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# define ks1 ks.ks[0]
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# define ks2 ks.ks[1]
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# define ks3 ks.ks[2]
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# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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/* ---------^^^ this is not a typo, just a way to detect that
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* assembler support was in general requested... */
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# include "crypto/sparc_arch.h"
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# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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void des_t4_key_expand(const void *key, DES_key_schedule *ks);
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void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule ks[3], unsigned char iv[8]);
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void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule ks[3], unsigned char iv[8]);
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# endif
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static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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# define data(ctx) EVP_C_DATA(DES_EDE_KEY,ctx)
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/*
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* Because of various casts and different args can't use
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* IMPLEMENT_BLOCK_CIPHER
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*/
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static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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BLOCK_CIPHER_ecb_loop()
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DES_ecb3_encrypt((const_DES_cblock *)(in + i),
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(DES_cblock *)(out + i),
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, EVP_CIPHER_CTX_is_encrypting(ctx));
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return 1;
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}
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static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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while (inl >= EVP_MAXCHUNK) {
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int num = EVP_CIPHER_CTX_get_num(ctx);
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DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3,
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(DES_cblock *)ctx->iv,
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&num);
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EVP_CIPHER_CTX_set_num(ctx, num);
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl) {
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int num = EVP_CIPHER_CTX_get_num(ctx);
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DES_ede3_ofb64_encrypt(in, out, (long)inl,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3,
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(DES_cblock *)ctx->iv,
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&num);
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EVP_CIPHER_CTX_set_num(ctx, num);
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}
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return 1;
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}
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static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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DES_EDE_KEY *dat = data(ctx);
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if (dat->stream.cbc != NULL) {
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(*dat->stream.cbc) (in, out, inl, dat->ks.ks,
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ctx->iv);
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return 1;
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}
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while (inl >= EVP_MAXCHUNK) {
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DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
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&dat->ks1, &dat->ks2, &dat->ks3,
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(DES_cblock *)ctx->iv,
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EVP_CIPHER_CTX_is_encrypting(ctx));
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl)
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DES_ede3_cbc_encrypt(in, out, (long)inl,
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&dat->ks1, &dat->ks2, &dat->ks3,
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(DES_cblock *)ctx->iv,
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EVP_CIPHER_CTX_is_encrypting(ctx));
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return 1;
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}
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static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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while (inl >= EVP_MAXCHUNK) {
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int num = EVP_CIPHER_CTX_get_num(ctx);
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DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&num, EVP_CIPHER_CTX_is_encrypting(ctx));
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EVP_CIPHER_CTX_set_num(ctx, num);
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl) {
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int num = EVP_CIPHER_CTX_get_num(ctx);
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DES_ede3_cfb64_encrypt(in, out, (long)inl,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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&num, EVP_CIPHER_CTX_is_encrypting(ctx));
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EVP_CIPHER_CTX_set_num(ctx, num);
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}
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return 1;
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}
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/*
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* Although we have a CFB-r implementation for 3-DES, it doesn't pack the
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* right way, so wrap it here
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*/
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static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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size_t n;
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unsigned char c[1];
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unsigned char d[1] = { 0 }; /* Appease Coverity */
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if (!EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
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inl *= 8;
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for (n = 0; n < inl; ++n) {
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c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
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DES_ede3_cfb_encrypt(c, d, 1, 1,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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EVP_CIPHER_CTX_is_encrypting(ctx));
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out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8)))
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| ((d[0] & 0x80) >> (unsigned int)(n % 8));
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}
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return 1;
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}
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static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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while (inl >= EVP_MAXCHUNK) {
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DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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EVP_CIPHER_CTX_is_encrypting(ctx));
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl)
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DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
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&data(ctx)->ks1, &data(ctx)->ks2,
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&data(ctx)->ks3, (DES_cblock *)ctx->iv,
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EVP_CIPHER_CTX_is_encrypting(ctx));
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return 1;
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}
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BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
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EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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des_ede_init_key, NULL, NULL, NULL, des3_ctrl)
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# define des_ede3_cfb64_cipher des_ede_cfb64_cipher
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# define des_ede3_ofb_cipher des_ede_ofb_cipher
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# define des_ede3_cbc_cipher des_ede_cbc_cipher
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# define des_ede3_ecb_cipher des_ede_ecb_cipher
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BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
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EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
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EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
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EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
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des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
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static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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DES_cblock *deskey = (DES_cblock *)key;
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DES_EDE_KEY *dat = data(ctx);
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dat->stream.cbc = NULL;
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# if defined(SPARC_DES_CAPABLE)
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if (SPARC_DES_CAPABLE) {
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int mode = EVP_CIPHER_CTX_get_mode(ctx);
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if (mode == EVP_CIPH_CBC_MODE) {
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des_t4_key_expand(&deskey[0], &dat->ks1);
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des_t4_key_expand(&deskey[1], &dat->ks2);
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memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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des_t4_ede3_cbc_decrypt;
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return 1;
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}
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}
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# endif
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DES_set_key_unchecked(&deskey[0], &dat->ks1);
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DES_set_key_unchecked(&deskey[1], &dat->ks2);
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memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
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return 1;
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}
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static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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DES_cblock *deskey = (DES_cblock *)key;
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DES_EDE_KEY *dat = data(ctx);
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dat->stream.cbc = NULL;
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# if defined(SPARC_DES_CAPABLE)
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if (SPARC_DES_CAPABLE) {
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int mode = EVP_CIPHER_CTX_get_mode(ctx);
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if (mode == EVP_CIPH_CBC_MODE) {
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des_t4_key_expand(&deskey[0], &dat->ks1);
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des_t4_key_expand(&deskey[1], &dat->ks2);
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des_t4_key_expand(&deskey[2], &dat->ks3);
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dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
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des_t4_ede3_cbc_decrypt;
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return 1;
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}
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}
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# endif
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DES_set_key_unchecked(&deskey[0], &dat->ks1);
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DES_set_key_unchecked(&deskey[1], &dat->ks2);
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DES_set_key_unchecked(&deskey[2], &dat->ks3);
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return 1;
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}
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static int des3_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
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{
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DES_cblock *deskey = ptr;
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int kl;
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switch (type) {
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case EVP_CTRL_RAND_KEY:
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kl = EVP_CIPHER_CTX_get_key_length(ctx);
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if (kl < 0 || RAND_priv_bytes(ptr, kl) <= 0)
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return 0;
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DES_set_odd_parity(deskey);
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if (kl >= 16)
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DES_set_odd_parity(deskey + 1);
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if (kl >= 24)
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DES_set_odd_parity(deskey + 2);
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return 1;
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default:
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return -1;
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}
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}
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const EVP_CIPHER *EVP_des_ede(void)
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{
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return &des_ede_ecb;
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}
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const EVP_CIPHER *EVP_des_ede3(void)
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{
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return &des_ede3_ecb;
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}
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# include <openssl/sha.h>
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static const unsigned char wrap_iv[8] =
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{ 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
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static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH];
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int rv = -1;
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if (inl < 24)
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return -1;
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if (out == NULL)
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return inl - 16;
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memcpy(ctx->iv, wrap_iv, 8);
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/* Decrypt first block which will end up as icv */
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des_ede_cbc_cipher(ctx, icv, in, 8);
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/* Decrypt central blocks */
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/*
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* If decrypting in place move whole output along a block so the next
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* des_ede_cbc_cipher is in place.
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*/
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if (out == in) {
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memmove(out, out + 8, inl - 8);
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in -= 8;
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}
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des_ede_cbc_cipher(ctx, out, in + 8, inl - 16);
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/* Decrypt final block which will be IV */
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des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8);
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/* Reverse order of everything */
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BUF_reverse(icv, NULL, 8);
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BUF_reverse(out, NULL, inl - 16);
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BUF_reverse(ctx->iv, iv, 8);
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/* Decrypt again using new IV */
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des_ede_cbc_cipher(ctx, out, out, inl - 16);
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des_ede_cbc_cipher(ctx, icv, icv, 8);
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if (ossl_sha1(out, inl - 16, sha1tmp) /* Work out hash of first portion */
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&& CRYPTO_memcmp(sha1tmp, icv, 8) == 0)
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rv = inl - 16;
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OPENSSL_cleanse(icv, 8);
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OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
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OPENSSL_cleanse(iv, 8);
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OPENSSL_cleanse(ctx->iv, 8);
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if (rv == -1)
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OPENSSL_cleanse(out, inl - 16);
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return rv;
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}
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static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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unsigned char sha1tmp[SHA_DIGEST_LENGTH];
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if (out == NULL)
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return inl + 16;
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/* Copy input to output buffer + 8 so we have space for IV */
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memmove(out + 8, in, inl);
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/* Work out ICV */
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if (!ossl_sha1(in, inl, sha1tmp))
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return -1;
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memcpy(out + inl + 8, sha1tmp, 8);
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OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
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/* Generate random IV */
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if (RAND_bytes(ctx->iv, 8) <= 0)
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return -1;
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memcpy(out, ctx->iv, 8);
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/* Encrypt everything after IV in place */
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des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8);
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BUF_reverse(out, NULL, inl + 16);
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memcpy(ctx->iv, wrap_iv, 8);
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des_ede_cbc_cipher(ctx, out, out, inl + 16);
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return inl + 16;
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}
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static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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/*
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* Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
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* is more than will ever be needed. Also input length must be a multiple
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* of 8 bits.
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*/
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if (inl >= EVP_MAXCHUNK || inl % 8)
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return -1;
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if (ossl_is_partially_overlapping(out, in, inl)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
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return 0;
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}
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if (EVP_CIPHER_CTX_is_encrypting(ctx))
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return des_ede3_wrap(ctx, out, in, inl);
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else
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return des_ede3_unwrap(ctx, out, in, inl);
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}
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static const EVP_CIPHER des3_wrap = {
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NID_id_smime_alg_CMS3DESwrap,
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8, 24, 0,
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EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
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| EVP_CIPH_FLAG_DEFAULT_ASN1,
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EVP_ORIG_GLOBAL,
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des_ede3_init_key, des_ede3_wrap_cipher,
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NULL,
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sizeof(DES_EDE_KEY),
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NULL, NULL, NULL, NULL
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};
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const EVP_CIPHER *EVP_des_ede3_wrap(void)
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{
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return &des3_wrap;
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}
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#endif
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