2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
13 #ifndef OPENSSL_NO_RC2
15 # include <openssl/evp.h>
16 # include <openssl/objects.h>
17 # include "internal/evp_int.h"
18 # include <openssl/rc2.h>
20 static int rc2_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
21 const unsigned char *iv
, int enc
);
22 static int rc2_meth_to_magic(EVP_CIPHER_CTX
*ctx
);
23 static int rc2_magic_to_meth(int i
);
24 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX
*c
, ASN1_TYPE
*type
);
25 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX
*c
, ASN1_TYPE
*type
);
26 static int rc2_ctrl(EVP_CIPHER_CTX
*c
, int type
, int arg
, void *ptr
);
29 int key_bits
; /* effective key bits */
30 RC2_KEY ks
; /* key schedule */
33 # define data(ctx) EVP_C_DATA(EVP_RC2_KEY,ctx)
35 IMPLEMENT_BLOCK_CIPHER(rc2
, ks
, RC2
, EVP_RC2_KEY
, NID_rc2
,
37 RC2_KEY_LENGTH
, 8, 64,
38 EVP_CIPH_VARIABLE_LENGTH
| EVP_CIPH_CTRL_INIT
,
40 rc2_set_asn1_type_and_iv
, rc2_get_asn1_type_and_iv
,
42 # define RC2_40_MAGIC 0xa0
43 # define RC2_64_MAGIC 0x78
44 # define RC2_128_MAGIC 0x3a
45 static const EVP_CIPHER r2_64_cbc_cipher
= {
47 8, 8 /* 64 bit */ , 8,
48 EVP_CIPH_CBC_MODE
| EVP_CIPH_VARIABLE_LENGTH
| EVP_CIPH_CTRL_INIT
,
53 rc2_set_asn1_type_and_iv
,
54 rc2_get_asn1_type_and_iv
,
59 static const EVP_CIPHER r2_40_cbc_cipher
= {
61 8, 5 /* 40 bit */ , 8,
62 EVP_CIPH_CBC_MODE
| EVP_CIPH_VARIABLE_LENGTH
| EVP_CIPH_CTRL_INIT
,
67 rc2_set_asn1_type_and_iv
,
68 rc2_get_asn1_type_and_iv
,
73 const EVP_CIPHER
*EVP_rc2_64_cbc(void)
75 return (&r2_64_cbc_cipher
);
78 const EVP_CIPHER
*EVP_rc2_40_cbc(void)
80 return (&r2_40_cbc_cipher
);
83 static int rc2_init_key(EVP_CIPHER_CTX
*ctx
, const unsigned char *key
,
84 const unsigned char *iv
, int enc
)
86 RC2_set_key(&data(ctx
)->ks
, EVP_CIPHER_CTX_key_length(ctx
),
87 key
, data(ctx
)->key_bits
);
91 static int rc2_meth_to_magic(EVP_CIPHER_CTX
*e
)
95 EVP_CIPHER_CTX_ctrl(e
, EVP_CTRL_GET_RC2_KEY_BITS
, 0, &i
);
97 return (RC2_128_MAGIC
);
99 return (RC2_64_MAGIC
);
101 return (RC2_40_MAGIC
);
106 static int rc2_magic_to_meth(int i
)
108 if (i
== RC2_128_MAGIC
)
110 else if (i
== RC2_64_MAGIC
)
112 else if (i
== RC2_40_MAGIC
)
115 EVPerr(EVP_F_RC2_MAGIC_TO_METH
, EVP_R_UNSUPPORTED_KEY_SIZE
);
120 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX
*c
, ASN1_TYPE
*type
)
126 unsigned char iv
[EVP_MAX_IV_LENGTH
];
129 l
= EVP_CIPHER_CTX_iv_length(c
);
130 OPENSSL_assert(l
<= sizeof(iv
));
131 i
= ASN1_TYPE_get_int_octetstring(type
, &num
, iv
, l
);
134 key_bits
= rc2_magic_to_meth((int)num
);
137 if (i
> 0 && !EVP_CipherInit_ex(c
, NULL
, NULL
, NULL
, iv
, -1))
139 EVP_CIPHER_CTX_ctrl(c
, EVP_CTRL_SET_RC2_KEY_BITS
, key_bits
, NULL
);
140 if (EVP_CIPHER_CTX_set_key_length(c
, key_bits
/ 8) <= 0)
146 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX
*c
, ASN1_TYPE
*type
)
152 num
= rc2_meth_to_magic(c
);
153 j
= EVP_CIPHER_CTX_iv_length(c
);
154 i
= ASN1_TYPE_set_int_octetstring(type
, num
,
155 (unsigned char *)EVP_CIPHER_CTX_original_iv(c
),
161 static int rc2_ctrl(EVP_CIPHER_CTX
*c
, int type
, int arg
, void *ptr
)
165 data(c
)->key_bits
= EVP_CIPHER_CTX_key_length(c
) * 8;
168 case EVP_CTRL_GET_RC2_KEY_BITS
:
169 *(int *)ptr
= data(c
)->key_bits
;
172 case EVP_CTRL_SET_RC2_KEY_BITS
:
174 data(c
)->key_bits
= arg
;
179 case EVP_CTRL_PBE_PRF_NID
:
180 *(int *)ptr
= NID_hmacWithMD5
;