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e1178600 SL |
1 | /* |
2 | * Copyright 2019 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 | ||
604e884b | 10 | #include "prov/ciphercommon.h" |
e1178600 | 11 | |
e1178600 SL |
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 | */ | |
16 | int 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 | ||
29 | int 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 | for (i = 0, len -= bl; i <= len; i += bl) | |
38 | (*dat->block) (in + i, out + i, dat->ks); | |
39 | ||
40 | return 1; | |
41 | } | |
42 | ||
43 | int cipher_hw_generic_ofb128(PROV_CIPHER_CTX *dat, unsigned char *out, | |
44 | const unsigned char *in, size_t len) | |
45 | { | |
46 | int num = dat->num; | |
47 | ||
48 | CRYPTO_ofb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->block); | |
49 | dat->num = num; | |
50 | ||
51 | return 1; | |
52 | } | |
53 | ||
54 | int cipher_hw_generic_cfb128(PROV_CIPHER_CTX *dat, unsigned char *out, | |
55 | const unsigned char *in, size_t len) | |
56 | { | |
57 | int num = dat->num; | |
58 | ||
59 | CRYPTO_cfb128_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc, | |
60 | dat->block); | |
61 | dat->num = num; | |
62 | ||
63 | return 1; | |
64 | } | |
65 | ||
66 | int cipher_hw_generic_cfb8(PROV_CIPHER_CTX *dat, unsigned char *out, | |
67 | const unsigned char *in, size_t len) | |
68 | { | |
69 | int num = dat->num; | |
70 | ||
71 | CRYPTO_cfb128_8_encrypt(in, out, len, dat->ks, dat->iv, &num, dat->enc, | |
72 | dat->block); | |
73 | dat->num = num; | |
74 | ||
75 | return 1; | |
76 | } | |
77 | ||
78 | int cipher_hw_generic_cfb1(PROV_CIPHER_CTX *dat, unsigned char *out, | |
79 | const unsigned char *in, size_t len) | |
80 | { | |
81 | int num = dat->num; | |
82 | ||
83 | if ((dat->flags & EVP_CIPH_FLAG_LENGTH_BITS) != 0) { | |
84 | CRYPTO_cfb128_1_encrypt(in, out, len, dat->ks, dat->iv, &num, | |
85 | dat->enc, dat->block); | |
86 | dat->num = num; | |
87 | return 1; | |
88 | } | |
89 | ||
90 | while (len >= MAXBITCHUNK) { | |
91 | CRYPTO_cfb128_1_encrypt(in, out, MAXBITCHUNK * 8, dat->ks, | |
92 | dat->iv, &num, dat->enc, dat->block); | |
93 | len -= MAXBITCHUNK; | |
94 | out += MAXBITCHUNK; | |
95 | in += MAXBITCHUNK; | |
96 | } | |
97 | if (len) | |
98 | CRYPTO_cfb128_1_encrypt(in, out, len * 8, dat->ks, dat->iv, &num, | |
99 | dat->enc, dat->block); | |
100 | ||
101 | dat->num = num; | |
102 | ||
103 | return 1; | |
104 | } | |
105 | ||
106 | int cipher_hw_generic_ctr(PROV_CIPHER_CTX *dat, unsigned char *out, | |
107 | const unsigned char *in, size_t len) | |
108 | { | |
109 | unsigned int num = dat->num; | |
110 | ||
111 | if (dat->stream.ctr) | |
112 | CRYPTO_ctr128_encrypt_ctr32(in, out, len, dat->ks, dat->iv, dat->buf, | |
113 | &num, dat->stream.ctr); | |
114 | else | |
115 | CRYPTO_ctr128_encrypt(in, out, len, dat->ks, dat->iv, dat->buf, | |
116 | &num, dat->block); | |
117 | dat->num = num; | |
118 | ||
119 | return 1; | |
120 | } | |
121 | ||
122 | /*- | |
123 | * The chunked cipher functions for cipher modes cbc, ecb, ofb, cfb and ctr. | |
124 | * Used if there is no special hardware implementations. | |
125 | */ | |
126 | ||
127 | int cipher_hw_chunked_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out, | |
128 | const unsigned char *in, size_t inl) | |
129 | { | |
130 | while (inl >= MAXCHUNK) { | |
131 | cipher_hw_generic_cbc(ctx, out, in, MAXCHUNK); | |
132 | inl -= MAXCHUNK; | |
133 | in += MAXCHUNK; | |
134 | out += MAXCHUNK; | |
135 | } | |
136 | if (inl > 0) | |
137 | cipher_hw_generic_cbc(ctx, out, in, inl); | |
138 | return 1; | |
139 | } | |
140 | ||
141 | int cipher_hw_chunked_cfb8(PROV_CIPHER_CTX *ctx, unsigned char *out, | |
142 | const unsigned char *in, size_t inl) | |
143 | { | |
144 | size_t chunk = MAXCHUNK; | |
145 | ||
146 | if (inl < chunk) | |
147 | chunk = inl; | |
148 | while (inl > 0 && inl >= chunk) { | |
149 | cipher_hw_generic_cfb8(ctx, out, in, inl); | |
150 | inl -= chunk; | |
151 | in += chunk; | |
152 | out += chunk; | |
153 | if (inl < chunk) | |
154 | chunk = inl; | |
155 | } | |
156 | return 1; | |
157 | } | |
158 | ||
159 | int cipher_hw_chunked_cfb128(PROV_CIPHER_CTX *ctx, unsigned char *out, | |
160 | const unsigned char *in, size_t inl) | |
161 | { | |
162 | size_t chunk = MAXCHUNK; | |
163 | ||
164 | if (inl < chunk) | |
165 | chunk = inl; | |
166 | while (inl > 0 && inl >= chunk) { | |
167 | cipher_hw_generic_cfb128(ctx, out, in, inl); | |
168 | inl -= chunk; | |
169 | in += chunk; | |
170 | out += chunk; | |
171 | if (inl < chunk) | |
172 | chunk = inl; | |
173 | } | |
174 | return 1; | |
175 | } | |
176 | ||
177 | int cipher_hw_chunked_ofb128(PROV_CIPHER_CTX *ctx, unsigned char *out, | |
178 | const unsigned char *in, size_t inl) | |
179 | { | |
180 | while (inl >= MAXCHUNK) { | |
181 | cipher_hw_generic_ofb128(ctx, out, in, MAXCHUNK); | |
182 | inl -= MAXCHUNK; | |
183 | in += MAXCHUNK; | |
184 | out += MAXCHUNK; | |
185 | } | |
186 | if (inl > 0) | |
187 | cipher_hw_generic_ofb128(ctx, out, in, inl); | |
188 | return 1; | |
189 | } |