| /* |
| * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * 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 |
| */ |
| |
| /* |
| * RC2 low level APIs are deprecated for public use, but still ok for internal |
| * use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <stdio.h> |
| #include "internal/cryptlib.h" |
| |
| #ifndef OPENSSL_NO_RC2 |
| |
| # include <openssl/evp.h> |
| # include <openssl/objects.h> |
| # include "crypto/evp.h" |
| # include <openssl/rc2.h> |
| # include "evp_local.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); |
| 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, |
| EVP_ORIG_GLOBAL, |
| 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, |
| EVP_ORIG_GLOBAL, |
| 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_get_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 { |
| ERR_raise(ERR_LIB_EVP, 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; |
| int key_bits; |
| unsigned int l; |
| unsigned char iv[EVP_MAX_IV_LENGTH]; |
| |
| if (type != NULL) { |
| l = EVP_CIPHER_CTX_get_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(c); |
| j = EVP_CIPHER_CTX_get_iv_length(c); |
| i = ASN1_TYPE_set_int_octetstring(type, num, c->oiv, 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_get_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 |