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1 /* ==================================================================== |
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2 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. |
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3 * |
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4 * Redistribution and use in source and binary forms, with or without |
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5 * modification, are permitted provided that the following conditions |
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6 * are met: |
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7 * |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in |
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13 * the documentation and/or other materials provided with the |
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14 * distribution. |
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15 * |
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16 * 3. All advertising materials mentioning features or use of this |
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17 * software must display the following acknowledgment: |
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18 * "This product includes software developed by the OpenSSL Project |
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19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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20 * |
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21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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22 * endorse or promote products derived from this software without |
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23 * prior written permission. For written permission, please contact |
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24 * openssl-core@openssl.org. |
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25 * |
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26 * 5. Products derived from this software may not be called "OpenSSL" |
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27 * nor may "OpenSSL" appear in their names without prior written |
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28 * permission of the OpenSSL Project. |
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29 * |
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30 * 6. Redistributions of any form whatsoever must retain the following |
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31 * acknowledgment: |
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32 * "This product includes software developed by the OpenSSL Project |
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33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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34 * |
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35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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46 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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47 * ==================================================================== |
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48 * |
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49 */ |
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50 |
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51 #include <openssl/opensslconf.h> |
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52 #ifndef OPENSSL_NO_AES |
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53 #include <openssl/evp.h> |
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54 #include <openssl/err.h> |
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55 #include <string.h> |
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56 #include <assert.h> |
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57 #include <openssl/aes.h> |
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58 #include "evp_locl.h" |
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59 |
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60 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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61 const unsigned char *iv, int enc); |
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62 |
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63 typedef struct |
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64 { |
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65 AES_KEY ks; |
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66 } EVP_AES_KEY; |
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67 |
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68 #define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) |
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69 |
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70 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, |
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71 NID_aes_128, 16, 16, 16, 128, |
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72 0, aes_init_key, NULL, |
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73 EVP_CIPHER_set_asn1_iv, |
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74 EVP_CIPHER_get_asn1_iv, |
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75 NULL) |
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76 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, |
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77 NID_aes_192, 16, 24, 16, 128, |
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78 0, aes_init_key, NULL, |
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79 EVP_CIPHER_set_asn1_iv, |
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80 EVP_CIPHER_get_asn1_iv, |
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81 NULL) |
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82 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, |
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83 NID_aes_256, 16, 32, 16, 128, |
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84 0, aes_init_key, NULL, |
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85 EVP_CIPHER_set_asn1_iv, |
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86 EVP_CIPHER_get_asn1_iv, |
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87 NULL) |
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88 |
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89 #define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) |
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90 |
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91 IMPLEMENT_AES_CFBR(128,1) |
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92 IMPLEMENT_AES_CFBR(192,1) |
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93 IMPLEMENT_AES_CFBR(256,1) |
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94 |
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95 IMPLEMENT_AES_CFBR(128,8) |
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96 IMPLEMENT_AES_CFBR(192,8) |
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97 IMPLEMENT_AES_CFBR(256,8) |
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98 |
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99 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
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100 const unsigned char *iv, int enc) |
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101 { |
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102 int ret; |
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103 |
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104 if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE |
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105 || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE |
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106 || enc) |
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107 ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
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108 else |
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109 ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); |
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110 |
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111 if(ret < 0) |
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112 { |
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113 EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); |
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114 return 0; |
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115 } |
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116 |
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117 return 1; |
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118 } |
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119 |
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120 #endif |