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Commit | Line | Data |
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62867571 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
0f113f3e | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
11 | #include <errno.h> | |
ec577822 BM |
12 | #include <openssl/buffer.h> |
13 | #include <openssl/evp.h> | |
a146ae55 | 14 | #include "internal/bio.h" |
d02b48c6 | 15 | |
0f113f3e MC |
16 | /* |
17 | * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest | |
18 | */ | |
d02b48c6 | 19 | |
0e1c0612 UM |
20 | static int md_write(BIO *h, char const *buf, int num); |
21 | static int md_read(BIO *h, char *buf, int size); | |
0e1c0612 UM |
22 | static int md_gets(BIO *h, char *str, int size); |
23 | static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
d02b48c6 RE |
24 | static int md_new(BIO *h); |
25 | static int md_free(BIO *data); | |
fce78bd4 | 26 | static long md_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); |
d3442bc7 | 27 | |
04f6b0fd | 28 | static const BIO_METHOD methods_md = { |
27ab9195 DB |
29 | BIO_TYPE_MD, |
30 | "message digest", | |
3befffa3 MC |
31 | /* TODO: Convert to new style write function */ |
32 | bwrite_conv, | |
0f113f3e | 33 | md_write, |
d07aee2c MC |
34 | /* TODO: Convert to new style read function */ |
35 | bread_conv, | |
0f113f3e MC |
36 | md_read, |
37 | NULL, /* md_puts, */ | |
38 | md_gets, | |
39 | md_ctrl, | |
40 | md_new, | |
41 | md_free, | |
42 | md_callback_ctrl, | |
43 | }; | |
d02b48c6 | 44 | |
04f6b0fd | 45 | const BIO_METHOD *BIO_f_md(void) |
0f113f3e | 46 | { |
26a7d938 | 47 | return &methods_md; |
0f113f3e | 48 | } |
d02b48c6 | 49 | |
6b691a5c | 50 | static int md_new(BIO *bi) |
0f113f3e MC |
51 | { |
52 | EVP_MD_CTX *ctx; | |
d02b48c6 | 53 | |
bfb0641f | 54 | ctx = EVP_MD_CTX_new(); |
0f113f3e | 55 | if (ctx == NULL) |
26a7d938 | 56 | return 0; |
d02b48c6 | 57 | |
a146ae55 MC |
58 | BIO_set_init(bi, 1); |
59 | BIO_set_data(bi, ctx); | |
60 | ||
61 | return 1; | |
0f113f3e | 62 | } |
d02b48c6 | 63 | |
6b691a5c | 64 | static int md_free(BIO *a) |
0f113f3e MC |
65 | { |
66 | if (a == NULL) | |
26a7d938 | 67 | return 0; |
a146ae55 MC |
68 | EVP_MD_CTX_free(BIO_get_data(a)); |
69 | BIO_set_data(a, NULL); | |
70 | BIO_set_init(a, 0); | |
71 | ||
72 | return 1; | |
0f113f3e MC |
73 | } |
74 | ||
6b691a5c | 75 | static int md_read(BIO *b, char *out, int outl) |
0f113f3e MC |
76 | { |
77 | int ret = 0; | |
78 | EVP_MD_CTX *ctx; | |
a146ae55 | 79 | BIO *next; |
d02b48c6 | 80 | |
0f113f3e | 81 | if (out == NULL) |
26a7d938 | 82 | return 0; |
d02b48c6 | 83 | |
a146ae55 MC |
84 | ctx = BIO_get_data(b); |
85 | next = BIO_next(b); | |
86 | ||
87 | if ((ctx == NULL) || (next == NULL)) | |
26a7d938 | 88 | return 0; |
d02b48c6 | 89 | |
a146ae55 MC |
90 | ret = BIO_read(next, out, outl); |
91 | if (BIO_get_init(b)) { | |
0f113f3e MC |
92 | if (ret > 0) { |
93 | if (EVP_DigestUpdate(ctx, (unsigned char *)out, | |
94 | (unsigned int)ret) <= 0) | |
26a7d938 | 95 | return -1; |
0f113f3e MC |
96 | } |
97 | } | |
98 | BIO_clear_retry_flags(b); | |
99 | BIO_copy_next_retry(b); | |
26a7d938 | 100 | return ret; |
0f113f3e | 101 | } |
d02b48c6 | 102 | |
0e1c0612 | 103 | static int md_write(BIO *b, const char *in, int inl) |
0f113f3e MC |
104 | { |
105 | int ret = 0; | |
106 | EVP_MD_CTX *ctx; | |
a146ae55 | 107 | BIO *next; |
d02b48c6 | 108 | |
0f113f3e | 109 | if ((in == NULL) || (inl <= 0)) |
a146ae55 | 110 | return 0; |
d02b48c6 | 111 | |
a146ae55 MC |
112 | ctx = BIO_get_data(b); |
113 | next = BIO_next(b); | |
114 | if ((ctx != NULL) && (next != NULL)) | |
115 | ret = BIO_write(next, in, inl); | |
116 | ||
117 | if (BIO_get_init(b)) { | |
0f113f3e MC |
118 | if (ret > 0) { |
119 | if (!EVP_DigestUpdate(ctx, (const unsigned char *)in, | |
120 | (unsigned int)ret)) { | |
121 | BIO_clear_retry_flags(b); | |
122 | return 0; | |
123 | } | |
124 | } | |
125 | } | |
a146ae55 | 126 | if (next != NULL) { |
0f113f3e MC |
127 | BIO_clear_retry_flags(b); |
128 | BIO_copy_next_retry(b); | |
129 | } | |
a146ae55 | 130 | return ret; |
0f113f3e | 131 | } |
d02b48c6 | 132 | |
0e1c0612 | 133 | static long md_ctrl(BIO *b, int cmd, long num, void *ptr) |
0f113f3e MC |
134 | { |
135 | EVP_MD_CTX *ctx, *dctx, **pctx; | |
136 | const EVP_MD **ppmd; | |
137 | EVP_MD *md; | |
138 | long ret = 1; | |
a146ae55 | 139 | BIO *dbio, *next; |
d02b48c6 | 140 | |
a146ae55 MC |
141 | |
142 | ctx = BIO_get_data(b); | |
143 | next = BIO_next(b); | |
d02b48c6 | 144 | |
0f113f3e MC |
145 | switch (cmd) { |
146 | case BIO_CTRL_RESET: | |
a146ae55 | 147 | if (BIO_get_init(b)) |
bc3a1377 | 148 | ret = EVP_DigestInit_ex(ctx, EVP_MD_CTX_md(ctx), NULL); |
0f113f3e MC |
149 | else |
150 | ret = 0; | |
151 | if (ret > 0) | |
a146ae55 | 152 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
153 | break; |
154 | case BIO_C_GET_MD: | |
a146ae55 | 155 | if (BIO_get_init(b)) { |
0f113f3e | 156 | ppmd = ptr; |
bc3a1377 | 157 | *ppmd = EVP_MD_CTX_md(ctx); |
0f113f3e MC |
158 | } else |
159 | ret = 0; | |
160 | break; | |
161 | case BIO_C_GET_MD_CTX: | |
162 | pctx = ptr; | |
163 | *pctx = ctx; | |
a146ae55 | 164 | BIO_set_init(b, 1); |
0f113f3e MC |
165 | break; |
166 | case BIO_C_SET_MD_CTX: | |
a146ae55 MC |
167 | if (BIO_get_init(b)) |
168 | BIO_set_data(b, ptr); | |
0f113f3e MC |
169 | else |
170 | ret = 0; | |
171 | break; | |
172 | case BIO_C_DO_STATE_MACHINE: | |
173 | BIO_clear_retry_flags(b); | |
a146ae55 | 174 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
175 | BIO_copy_next_retry(b); |
176 | break; | |
d02b48c6 | 177 | |
0f113f3e MC |
178 | case BIO_C_SET_MD: |
179 | md = ptr; | |
180 | ret = EVP_DigestInit_ex(ctx, md, NULL); | |
181 | if (ret > 0) | |
a146ae55 | 182 | BIO_set_init(b, 1); |
0f113f3e MC |
183 | break; |
184 | case BIO_CTRL_DUP: | |
185 | dbio = ptr; | |
a146ae55 | 186 | dctx = BIO_get_data(dbio); |
0f113f3e MC |
187 | if (!EVP_MD_CTX_copy_ex(dctx, ctx)) |
188 | return 0; | |
a146ae55 | 189 | BIO_set_init(b, 1); |
0f113f3e MC |
190 | break; |
191 | default: | |
a146ae55 | 192 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
193 | break; |
194 | } | |
26a7d938 | 195 | return ret; |
0f113f3e | 196 | } |
d02b48c6 | 197 | |
fce78bd4 | 198 | static long md_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) |
0f113f3e MC |
199 | { |
200 | long ret = 1; | |
a146ae55 MC |
201 | BIO *next; |
202 | ||
203 | next = BIO_next(b); | |
204 | ||
205 | if (next == NULL) | |
206 | return 0; | |
d3442bc7 | 207 | |
0f113f3e MC |
208 | switch (cmd) { |
209 | default: | |
a146ae55 | 210 | ret = BIO_callback_ctrl(next, cmd, fp); |
0f113f3e MC |
211 | break; |
212 | } | |
26a7d938 | 213 | return ret; |
0f113f3e | 214 | } |
d3442bc7 | 215 | |
6b691a5c | 216 | static int md_gets(BIO *bp, char *buf, int size) |
0f113f3e MC |
217 | { |
218 | EVP_MD_CTX *ctx; | |
219 | unsigned int ret; | |
d02b48c6 | 220 | |
a146ae55 MC |
221 | ctx = BIO_get_data(bp); |
222 | ||
bc3a1377 | 223 | if (size < EVP_MD_CTX_size(ctx)) |
a146ae55 MC |
224 | return 0; |
225 | ||
0f113f3e MC |
226 | if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0) |
227 | return -1; | |
d02b48c6 | 228 | |
26a7d938 | 229 | return (int)ret; |
0f113f3e | 230 | } |