1 /*
2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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
8 */
9
10 #include "prov/ciphercommon.h"
11
12 /*-
13 * The generic cipher functions for cipher modes cbc, ecb, ofb, cfb and ctr.
14 * Used if there is no special hardware implementations.
15 */
ossl_cipher_hw_generic_cbc(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)16 int ossl_cipher_hw_generic_cbc(PROV_CIPHER_CTX *dat, unsigned char *out,
17 const unsigned char *in, size_t len)
18 {
19 if (dat->stream.cbc)
20 (*dat->stream.cbc) (in, out, len, dat->ks, dat->iv, dat->enc);
21 else if (dat->enc)
22 CRYPTO_cbc128_encrypt(in, out, len, dat->ks, dat->iv, dat->block);
23 else
24 CRYPTO_cbc128_decrypt(in, out, len, dat->ks, dat->iv, dat->block);
25
26 return 1;
27 }
28
ossl_cipher_hw_generic_ecb(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)29 int ossl_cipher_hw_generic_ecb(PROV_CIPHER_CTX *dat, unsigned char *out,
30 const unsigned char *in, size_t len)
31 {
32 size_t i, bl = dat->blocksize;
33
34 if (len < bl)
35 return 1;
36
37 if (dat->stream.ecb) {
38 (*dat->stream.ecb) (in, out, len, dat->ks, dat->enc);
39 }
40 else {
41 for (i = 0, len -= bl; i <= len; i += bl)
42 (*dat->block) (in + i, out + i, dat->ks);
43 }
44
45 return 1;
46 }
47
ossl_cipher_hw_generic_ofb128(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)48 int ossl_cipher_hw_generic_ofb128(PROV_CIPHER_CTX *dat, unsigned char *out,
49 const unsigned char *in, size_t len)
50 {
51 int num = dat->num;
52
53 CRYPTO_ofb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->block);
54 dat->num = num;
55
56 return 1;
57 }
58
ossl_cipher_hw_generic_cfb128(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)59 int ossl_cipher_hw_generic_cfb128(PROV_CIPHER_CTX *dat, unsigned char *out,
60 const unsigned char *in, size_t len)
61 {
62 int num = dat->num;
63
64 CRYPTO_cfb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc,
65 dat->block);
66 dat->num = num;
67
68 return 1;
69 }
70
ossl_cipher_hw_generic_cfb8(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)71 int ossl_cipher_hw_generic_cfb8(PROV_CIPHER_CTX *dat, unsigned char *out,
72 const unsigned char *in, size_t len)
73 {
74 int num = dat->num;
75
76 CRYPTO_cfb128_8_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc,
77 dat->block);
78 dat->num = num;
79
80 return 1;
81 }
82
ossl_cipher_hw_generic_cfb1(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)83 int ossl_cipher_hw_generic_cfb1(PROV_CIPHER_CTX *dat, unsigned char *out,
84 const unsigned char *in, size_t len)
85 {
86 int num = dat->num;
87
88 if (dat->use_bits) {
89 CRYPTO_cfb128_1_encrypt(in, out, len, dat->ks, dat->iv, &num,
90 dat->enc, dat->block);
91 dat->num = num;
92 return 1;
93 }
94
95 while (len >= MAXBITCHUNK) {
96 CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, dat->ks,
97 dat->iv, &num, dat->enc, dat->block);
98 len -= MAXBITCHUNK;
99 out += MAXBITCHUNK;
100 in += MAXBITCHUNK;
101 }
102 if (len)
103 CRYPTO_cfb128_1_encrypt(in, out, len * 8, dat->ks, dat->iv, &num,
104 dat->enc, dat->block);
105
106 dat->num = num;
107
108 return 1;
109 }
110
ossl_cipher_hw_generic_ctr(PROV_CIPHER_CTX * dat,unsigned char * out,const unsigned char * in,size_t len)111 int ossl_cipher_hw_generic_ctr(PROV_CIPHER_CTX *dat, unsigned char *out,
112 const unsigned char *in, size_t len)
113 {
114 unsigned int num = dat->num;
115
116 if (dat->stream.ctr)
117 CRYPTO_ctr128_encrypt_ctr32(in, out, len, dat->ks, dat->iv, dat->buf,
118 &num, dat->stream.ctr);
119 else
120 CRYPTO_ctr128_encrypt(in, out, len, dat->ks, dat->iv, dat->buf,
121 &num, dat->block);
122 dat->num = num;
123
124 return 1;
125 }
126
127 /*-
128 * The chunked cipher functions for cipher modes cbc, ecb, ofb, cfb and ctr.
129 * Used if there is no special hardware implementations.
130 */
131
ossl_cipher_hw_chunked_cbc(PROV_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)132 int ossl_cipher_hw_chunked_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
133 const unsigned char *in, size_t inl)
134 {
135 while (inl >= MAXCHUNK) {
136 ossl_cipher_hw_generic_cbc(ctx, out, in, MAXCHUNK);
137 inl -= MAXCHUNK;
138 in += MAXCHUNK;
139 out += MAXCHUNK;
140 }
141 if (inl > 0)
142 ossl_cipher_hw_generic_cbc(ctx, out, in, inl);
143 return 1;
144 }
145
ossl_cipher_hw_chunked_cfb8(PROV_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)146 int ossl_cipher_hw_chunked_cfb8(PROV_CIPHER_CTX *ctx, unsigned char *out,
147 const unsigned char *in, size_t inl)
148 {
149 size_t chunk = MAXCHUNK;
150
151 if (inl < chunk)
152 chunk = inl;
153 while (inl > 0 && inl >= chunk) {
154 ossl_cipher_hw_generic_cfb8(ctx, out, in, inl);
155 inl -= chunk;
156 in += chunk;
157 out += chunk;
158 if (inl < chunk)
159 chunk = inl;
160 }
161 return 1;
162 }
163
ossl_cipher_hw_chunked_cfb128(PROV_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)164 int ossl_cipher_hw_chunked_cfb128(PROV_CIPHER_CTX *ctx, unsigned char *out,
165 const unsigned char *in, size_t inl)
166 {
167 size_t chunk = MAXCHUNK;
168
169 if (inl < chunk)
170 chunk = inl;
171 while (inl > 0 && inl >= chunk) {
172 ossl_cipher_hw_generic_cfb128(ctx, out, in, inl);
173 inl -= chunk;
174 in += chunk;
175 out += chunk;
176 if (inl < chunk)
177 chunk = inl;
178 }
179 return 1;
180 }
181
ossl_cipher_hw_chunked_ofb128(PROV_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)182 int ossl_cipher_hw_chunked_ofb128(PROV_CIPHER_CTX *ctx, unsigned char *out,
183 const unsigned char *in, size_t inl)
184 {
185 while (inl >= MAXCHUNK) {
186 ossl_cipher_hw_generic_ofb128(ctx, out, in, MAXCHUNK);
187 inl -= MAXCHUNK;
188 in += MAXCHUNK;
189 out += MAXCHUNK;
190 }
191 if (inl > 0)
192 ossl_cipher_hw_generic_ofb128(ctx, out, in, inl);
193 return 1;
194 }
195