Initial Commit

openssl-1.0.2f/crypto/evp/e_des.c

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+/* crypto/evp/e_des.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * 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.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#ifndef OPENSSL_NO_DES
+# include <openssl/evp.h>
+# include <openssl/objects.h>
+# include "evp_locl.h"
+# include <openssl/des.h>
+# include <openssl/rand.h>
+
+typedef struct {
+    union {
+        double align;
+        DES_key_schedule ks;
+    } ks;
+    union {
+        void (*cbc) (const void *, void *, size_t, const void *, void *);
+    } stream;
+} EVP_DES_KEY;
+
+# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
+/* ---------^^^ this is not a typo, just a way to detect that
+ * assembler support was in general requested... */
+#  include "sparc_arch.h"
+
+extern unsigned int OPENSSL_sparcv9cap_P[];
+
+#  define SPARC_DES_CAPABLE       (OPENSSL_sparcv9cap_P[1] & CFR_DES)
+
+void des_t4_key_expand(const void *key, DES_key_schedule *ks);
+void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
+                        DES_key_schedule *ks, unsigned char iv[8]);
+void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
+                        DES_key_schedule *ks, unsigned char iv[8]);
+# endif
+
+static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc);
+static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+/*
+ * Because of various casts and different names can't use
+ * IMPLEMENT_BLOCK_CIPHER
+ */
+
+static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                          const unsigned char *in, size_t inl)
+{
+    BLOCK_CIPHER_ecb_loop()
+        DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
+                        ctx->cipher_data, ctx->encrypt);
+    return 1;
+}
+
+static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                          const unsigned char *in, size_t inl)
+{
+    while (inl >= EVP_MAXCHUNK) {
+        DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+                          (DES_cblock *)ctx->iv, &ctx->num);
+        inl -= EVP_MAXCHUNK;
+        in += EVP_MAXCHUNK;
+        out += EVP_MAXCHUNK;
+    }
+    if (inl)
+        DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
+                          (DES_cblock *)ctx->iv, &ctx->num);
+    return 1;
+}
+
+static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                          const unsigned char *in, size_t inl)
+{
+    EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
+
+    if (dat->stream.cbc) {
+        (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
+        return 1;
+    }
+    while (inl >= EVP_MAXCHUNK) {
+        DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+                         (DES_cblock *)ctx->iv, ctx->encrypt);
+        inl -= EVP_MAXCHUNK;
+        in += EVP_MAXCHUNK;
+        out += EVP_MAXCHUNK;
+    }
+    if (inl)
+        DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
+                         (DES_cblock *)ctx->iv, ctx->encrypt);
+    return 1;
+}
+
+static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                            const unsigned char *in, size_t inl)
+{
+    while (inl >= EVP_MAXCHUNK) {
+        DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
+                          (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+        inl -= EVP_MAXCHUNK;
+        in += EVP_MAXCHUNK;
+        out += EVP_MAXCHUNK;
+    }
+    if (inl)
+        DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
+                          (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
+    return 1;
+}
+
+/*
+ * Although we have a CFB-r implementation for DES, it doesn't pack the right
+ * way, so wrap it here
+ */
+static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                           const unsigned char *in, size_t inl)
+{
+    size_t n, chunk = EVP_MAXCHUNK / 8;
+    unsigned char c[1], d[1];
+
+    if (inl < chunk)
+        chunk = inl;
+
+    while (inl && inl >= chunk) {
+        for (n = 0; n < chunk * 8; ++n) {
+            c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
+            DES_cfb_encrypt(c, d, 1, 1, ctx->cipher_data,
+                            (DES_cblock *)ctx->iv, ctx->encrypt);
+            out[n / 8] =
+                (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
+                ((d[0] & 0x80) >> (unsigned int)(n % 8));
+        }
+        inl -= chunk;
+        in += chunk;
+        out += chunk;
+        if (inl < chunk)
+            chunk = inl;
+    }
+
+    return 1;
+}
+
+static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+                           const unsigned char *in, size_t inl)
+{
+    while (inl >= EVP_MAXCHUNK) {
+        DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, ctx->cipher_data,
+                        (DES_cblock *)ctx->iv, ctx->encrypt);
+        inl -= EVP_MAXCHUNK;
+        in += EVP_MAXCHUNK;
+        out += EVP_MAXCHUNK;
+    }
+    if (inl)
+        DES_cfb_encrypt(in, out, 8, (long)inl, ctx->cipher_data,
+                        (DES_cblock *)ctx->iv, ctx->encrypt);
+    return 1;
+}
+
+BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
+                  EVP_CIPH_RAND_KEY, des_init_key, NULL,
+                  EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
+
+    BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
+                     EVP_CIPH_RAND_KEY, des_init_key, NULL,
+                     EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
+
+    BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
+                     EVP_CIPH_RAND_KEY, des_init_key, NULL,
+                     EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
+
+static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc)
+{
+    DES_cblock *deskey = (DES_cblock *)key;
+    EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data;
+
+    dat->stream.cbc = NULL;
+# if defined(SPARC_DES_CAPABLE)
+    if (SPARC_DES_CAPABLE) {
+        int mode = ctx->cipher->flags & EVP_CIPH_MODE;
+
+        if (mode == EVP_CIPH_CBC_MODE) {
+            des_t4_key_expand(key, &dat->ks.ks);
+            dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
+            return 1;
+        }
+    }
+# endif
+# ifdef EVP_CHECK_DES_KEY
+    if (DES_set_key_checked(deskey, dat->ks.ks) != 0)
+        return 0;
+# else
+    DES_set_key_unchecked(deskey, ctx->cipher_data);
+# endif
+    return 1;
+}
+
+static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+{
+
+    switch (type) {
+    case EVP_CTRL_RAND_KEY:
+        if (RAND_bytes(ptr, 8) <= 0)
+            return 0;
+        DES_set_odd_parity((DES_cblock *)ptr);
+        return 1;
+
+    default:
+        return -1;
+    }
+}
+
+#endif