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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 | */ | |
592dcfd3 | 16 | int ossl_cipher_hw_generic_cbc(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
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 | ||
592dcfd3 | 29 | int ossl_cipher_hw_generic_ecb(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
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 | ||
2ff16afc X |
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 | } | |
e1178600 SL |
44 | |
45 | return 1; | |
46 | } | |
47 | ||
592dcfd3 | 48 | int ossl_cipher_hw_generic_ofb128(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
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 | ||
592dcfd3 P |
59 | int ossl_cipher_hw_generic_cfb128(PROV_CIPHER_CTX *dat, unsigned char *out, |
60 | const unsigned char *in, size_t len) | |
e1178600 SL |
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 | ||
592dcfd3 | 71 | int ossl_cipher_hw_generic_cfb8(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
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 | ||
592dcfd3 | 83 | int ossl_cipher_hw_generic_cfb1(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
84 | const unsigned char *in, size_t len) |
85 | { | |
86 | int num = dat->num; | |
87 | ||
88 | if ((dat->flags & EVP_CIPH_FLAG_LENGTH_BITS) != 0) { | |
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 | ||
592dcfd3 | 111 | int ossl_cipher_hw_generic_ctr(PROV_CIPHER_CTX *dat, unsigned char *out, |
e1178600 SL |
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 | ||
592dcfd3 | 132 | int ossl_cipher_hw_chunked_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out, |
e1178600 SL |
133 | const unsigned char *in, size_t inl) |
134 | { | |
135 | while (inl >= MAXCHUNK) { | |
592dcfd3 | 136 | ossl_cipher_hw_generic_cbc(ctx, out, in, MAXCHUNK); |
e1178600 SL |
137 | inl -= MAXCHUNK; |
138 | in += MAXCHUNK; | |
139 | out += MAXCHUNK; | |
140 | } | |
141 | if (inl > 0) | |
592dcfd3 | 142 | ossl_cipher_hw_generic_cbc(ctx, out, in, inl); |
e1178600 SL |
143 | return 1; |
144 | } | |
145 | ||
592dcfd3 | 146 | int ossl_cipher_hw_chunked_cfb8(PROV_CIPHER_CTX *ctx, unsigned char *out, |
e1178600 SL |
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) { | |
592dcfd3 | 154 | ossl_cipher_hw_generic_cfb8(ctx, out, in, inl); |
e1178600 SL |
155 | inl -= chunk; |
156 | in += chunk; | |
157 | out += chunk; | |
158 | if (inl < chunk) | |
159 | chunk = inl; | |
160 | } | |
161 | return 1; | |
162 | } | |
163 | ||
592dcfd3 | 164 | int ossl_cipher_hw_chunked_cfb128(PROV_CIPHER_CTX *ctx, unsigned char *out, |
e1178600 SL |
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) { | |
592dcfd3 | 172 | ossl_cipher_hw_generic_cfb128(ctx, out, in, inl); |
e1178600 SL |
173 | inl -= chunk; |
174 | in += chunk; | |
175 | out += chunk; | |
176 | if (inl < chunk) | |
177 | chunk = inl; | |
178 | } | |
179 | return 1; | |
180 | } | |
181 | ||
592dcfd3 | 182 | int ossl_cipher_hw_chunked_ofb128(PROV_CIPHER_CTX *ctx, unsigned char *out, |
e1178600 SL |
183 | const unsigned char *in, size_t inl) |
184 | { | |
185 | while (inl >= MAXCHUNK) { | |
592dcfd3 | 186 | ossl_cipher_hw_generic_ofb128(ctx, out, in, MAXCHUNK); |
e1178600 SL |
187 | inl -= MAXCHUNK; |
188 | in += MAXCHUNK; | |
189 | out += MAXCHUNK; | |
190 | } | |
191 | if (inl > 0) | |
592dcfd3 | 192 | ossl_cipher_hw_generic_ofb128(ctx, out, in, inl); |
e1178600 SL |
193 | return 1; |
194 | } |