Following the license change, modify the boilerplates in crypto/evp/
[openssl.git] / crypto / evp / e_rc2.c
index 4c3bf1e..375714a 100644 (file)
-/* crypto/evp/e_rc2.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 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
  */
 
-#ifndef NO_RC2
-
 #include <stdio.h>
-#include "cryptlib.h"
-#include <openssl/evp.h>
-#include <openssl/objects.h>
-#include "evp_locl.h"
-
-static int rc2_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
-       unsigned char *iv,int enc);
-static int rc2_meth_to_magic(const EVP_CIPHER *e);
-static EVP_CIPHER *rc2_magic_to_meth(int i);
+#include "internal/cryptlib.h"
+
+#ifndef OPENSSL_NO_RC2
+
+# include <openssl/evp.h>
+# include <openssl/objects.h>
+# include "internal/evp_int.h"
+# include <openssl/rc2.h>
+
+static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc);
+static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx);
+static int rc2_magic_to_meth(int i);
 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
-
-IMPLEMENT_BLOCK_CIPHER(rc2, rc2.ks, RC2, rc2, NID_rc2,
-                       8,
-                       EVP_RC2_KEY_SIZE, 8,
-                       EVP_CIPH_VARIABLE_LENGTH, rc2_init_key, NULL,
-                       rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, NULL)
-
-#define RC2_40_MAGIC   0xa0
-#define RC2_64_MAGIC   0x78
-#define RC2_128_MAGIC  0x3a
-
-static EVP_CIPHER r2_64_cbc_cipher=
-       {
-       NID_rc2_64_cbc,
-       8,8 /* 64 bit */,8,
-       EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
-       rc2_init_key,
-       rc2_cbc_cipher,
-       NULL,
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
-       rc2_set_asn1_type_and_iv,
-       rc2_get_asn1_type_and_iv,
-       NULL,
-       NULL
-       };
-
-static EVP_CIPHER r2_40_cbc_cipher=
-       {
-       NID_rc2_40_cbc,
-       8,5 /* 40 bit */,8,
-       EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH,
-       rc2_init_key,
-       rc2_cbc_cipher,
-       NULL,
-       sizeof(EVP_CIPHER_CTX)-sizeof((((EVP_CIPHER_CTX *)NULL)->c))+
-               sizeof((((EVP_CIPHER_CTX *)NULL)->c.rc2)),
-       rc2_set_asn1_type_and_iv,
-       rc2_get_asn1_type_and_iv,
-       NULL,
-       NULL
-       };
-
-EVP_CIPHER *EVP_rc2_64_cbc(void)
-       {
-       return(&r2_64_cbc_cipher);
-       }
-
-EVP_CIPHER *EVP_rc2_40_cbc(void)
-       {
-       return(&r2_40_cbc_cipher);
-       }
-       
-static int rc2_init_key(EVP_CIPHER_CTX *ctx, unsigned char *key,
-            unsigned char *iv, int enc)
-       {
-       RC2_set_key(&(ctx->c.rc2.ks),EVP_CIPHER_CTX_key_length(ctx),
-                       key,EVP_CIPHER_key_length(ctx->cipher)*8);
-       return 1;
-       }
-
-static int rc2_meth_to_magic(const EVP_CIPHER *e)
-       {
-       int i;
-
-       i=EVP_CIPHER_key_length(e);
-       if      (i == 16) return(RC2_128_MAGIC);
-       else if (i == 8)  return(RC2_64_MAGIC);
-       else if (i == 5)  return(RC2_40_MAGIC);
-       else return(0);
-       }
-
-static EVP_CIPHER *rc2_magic_to_meth(int i)
-       {
-       if      (i == RC2_128_MAGIC) return(EVP_rc2_cbc());
-       else if (i == RC2_64_MAGIC)  return(EVP_rc2_64_cbc());
-       else if (i == RC2_40_MAGIC)  return(EVP_rc2_40_cbc());
-       else
-               {
-               EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE);
-               return(NULL);
-               }
-       }
+static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
+
+typedef struct {
+    int key_bits;               /* effective key bits */
+    RC2_KEY ks;                 /* key schedule */
+} EVP_RC2_KEY;
+
+# define data(ctx)       EVP_C_DATA(EVP_RC2_KEY,ctx)
+
+IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2,
+                       8,
+                       RC2_KEY_LENGTH, 8, 64,
+                       EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+                       rc2_init_key, NULL,
+                       rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv,
+                       rc2_ctrl)
+# define RC2_40_MAGIC    0xa0
+# define RC2_64_MAGIC    0x78
+# define RC2_128_MAGIC   0x3a
+static const EVP_CIPHER r2_64_cbc_cipher = {
+    NID_rc2_64_cbc,
+    8, 8 /* 64 bit */ , 8,
+    EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+    rc2_init_key,
+    rc2_cbc_cipher,
+    NULL,
+    sizeof(EVP_RC2_KEY),
+    rc2_set_asn1_type_and_iv,
+    rc2_get_asn1_type_and_iv,
+    rc2_ctrl,
+    NULL
+};
+
+static const EVP_CIPHER r2_40_cbc_cipher = {
+    NID_rc2_40_cbc,
+    8, 5 /* 40 bit */ , 8,
+    EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
+    rc2_init_key,
+    rc2_cbc_cipher,
+    NULL,
+    sizeof(EVP_RC2_KEY),
+    rc2_set_asn1_type_and_iv,
+    rc2_get_asn1_type_and_iv,
+    rc2_ctrl,
+    NULL
+};
+
+const EVP_CIPHER *EVP_rc2_64_cbc(void)
+{
+    return &r2_64_cbc_cipher;
+}
+
+const EVP_CIPHER *EVP_rc2_40_cbc(void)
+{
+    return &r2_40_cbc_cipher;
+}
+
+static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc)
+{
+    RC2_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
+                key, data(ctx)->key_bits);
+    return 1;
+}
+
+static int rc2_meth_to_magic(EVP_CIPHER_CTX *e)
+{
+    int i;
+
+    if (EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i) <= 0)
+        return 0;
+    if (i == 128)
+        return RC2_128_MAGIC;
+    else if (i == 64)
+        return RC2_64_MAGIC;
+    else if (i == 40)
+        return RC2_40_MAGIC;
+    else
+        return 0;
+}
+
+static int rc2_magic_to_meth(int i)
+{
+    if (i == RC2_128_MAGIC)
+        return 128;
+    else if (i == RC2_64_MAGIC)
+        return 64;
+    else if (i == RC2_40_MAGIC)
+        return 40;
+    else {
+        EVPerr(EVP_F_RC2_MAGIC_TO_METH, EVP_R_UNSUPPORTED_KEY_SIZE);
+        return 0;
+    }
+}
 
 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
-       {
-       long num=0;
-       int i=0,l;
-       EVP_CIPHER *e;
-
-       if (type != NULL)
-               {
-               l=EVP_CIPHER_CTX_iv_length(c);
-               i=ASN1_TYPE_get_int_octetstring(type,&num,c->oiv,l);
-               if (i != l)
-                       return(-1);
-               else if (i > 0)
-                       memcpy(c->iv,c->oiv,l);
-               e=rc2_magic_to_meth((int)num);
-               if (e == NULL)
-                       return(-1);
-               if (e != EVP_CIPHER_CTX_cipher(c))
-                       {
-                       EVP_CIPHER_CTX_cipher(c)=e;
-                       EVP_CIPHER_CTX_set_key_length(c, EVP_CIPHER_key_length(c));
-                       rc2_init_key(c,NULL,NULL,1);
-                       }
-               }
-       return(i);
-       }
+{
+    long num = 0;
+    int i = 0;
+    int key_bits;
+    unsigned int l;
+    unsigned char iv[EVP_MAX_IV_LENGTH];
+
+    if (type != NULL) {
+        l = EVP_CIPHER_CTX_iv_length(c);
+        OPENSSL_assert(l <= sizeof(iv));
+        i = ASN1_TYPE_get_int_octetstring(type, &num, iv, l);
+        if (i != (int)l)
+            return -1;
+        key_bits = rc2_magic_to_meth((int)num);
+        if (!key_bits)
+            return -1;
+        if (i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1))
+            return -1;
+        if (EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits,
+                                NULL) <= 0
+                || EVP_CIPHER_CTX_set_key_length(c, key_bits / 8) <= 0)
+            return -1;
+    }
+    return i;
+}
 
 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
-       {
-       long num;
-       int i=0,j;
-
-       if (type != NULL)
-               {
-               num=rc2_meth_to_magic(EVP_CIPHER_CTX_cipher(c));
-               j=EVP_CIPHER_CTX_iv_length(c);
-               i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j);
-               }
-       return(i);
-       }
+{
+    long num;
+    int i = 0, j;
+
+    if (type != NULL) {
+        num = rc2_meth_to_magic(c);
+        j = EVP_CIPHER_CTX_iv_length(c);
+        i = ASN1_TYPE_set_int_octetstring(type, num,
+                                          (unsigned char *)EVP_CIPHER_CTX_original_iv(c),
+                                          j);
+    }
+    return i;
+}
+
+static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+{
+    switch (type) {
+    case EVP_CTRL_INIT:
+        data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8;
+        return 1;
+
+    case EVP_CTRL_GET_RC2_KEY_BITS:
+        *(int *)ptr = data(c)->key_bits;
+        return 1;
+
+    case EVP_CTRL_SET_RC2_KEY_BITS:
+        if (arg > 0) {
+            data(c)->key_bits = arg;
+            return 1;
+        }
+        return 0;
+# ifdef PBE_PRF_TEST
+    case EVP_CTRL_PBE_PRF_NID:
+        *(int *)ptr = NID_hmacWithMD5;
+        return 1;
+# endif
+
+    default:
+        return -1;
+    }
+}
 
 #endif