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git.proxmox.com Git - efi-boot-shim.git/blob - Cryptlib/OpenSSL/crypto/evp/bio_md.c
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
12 #include "internal/cryptlib.h"
13 #include <openssl/buffer.h>
14 #include <openssl/evp.h>
15 #include "internal/evp_int.h"
17 #include "internal/bio.h"
20 * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest
23 static int md_write(BIO
*h
, char const *buf
, int num
);
24 static int md_read(BIO
*h
, char *buf
, int size
);
26 * static int md_puts(BIO *h, const char *str);
28 static int md_gets(BIO
*h
, char *str
, int size
);
29 static long md_ctrl(BIO
*h
, int cmd
, long arg1
, void *arg2
);
30 static int md_new(BIO
*h
);
31 static int md_free(BIO
*data
);
32 static long md_callback_ctrl(BIO
*h
, int cmd
, bio_info_cb
*fp
);
34 static const BIO_METHOD methods_md
= {
35 BIO_TYPE_MD
, "message digest",
46 const BIO_METHOD
*BIO_f_md(void)
51 static int md_new(BIO
*bi
)
55 ctx
= EVP_MD_CTX_new();
60 BIO_set_data(bi
, ctx
);
65 static int md_free(BIO
*a
)
69 EVP_MD_CTX_free(BIO_get_data(a
));
70 BIO_set_data(a
, NULL
);
76 static int md_read(BIO
*b
, char *out
, int outl
)
85 ctx
= BIO_get_data(b
);
88 if ((ctx
== NULL
) || (next
== NULL
))
91 ret
= BIO_read(next
, out
, outl
);
92 if (BIO_get_init(b
)) {
94 if (EVP_DigestUpdate(ctx
, (unsigned char *)out
,
95 (unsigned int)ret
) <= 0)
99 BIO_clear_retry_flags(b
);
100 BIO_copy_next_retry(b
);
104 static int md_write(BIO
*b
, const char *in
, int inl
)
110 if ((in
== NULL
) || (inl
<= 0))
113 ctx
= BIO_get_data(b
);
115 if ((ctx
!= NULL
) && (next
!= NULL
))
116 ret
= BIO_write(next
, in
, inl
);
118 if (BIO_get_init(b
)) {
120 if (!EVP_DigestUpdate(ctx
, (const unsigned char *)in
,
121 (unsigned int)ret
)) {
122 BIO_clear_retry_flags(b
);
128 BIO_clear_retry_flags(b
);
129 BIO_copy_next_retry(b
);
134 static long md_ctrl(BIO
*b
, int cmd
, long num
, void *ptr
)
136 EVP_MD_CTX
*ctx
, *dctx
, **pctx
;
143 ctx
= BIO_get_data(b
);
149 ret
= EVP_DigestInit_ex(ctx
, ctx
->digest
, NULL
);
153 ret
= BIO_ctrl(next
, cmd
, num
, ptr
);
156 if (BIO_get_init(b
)) {
162 case BIO_C_GET_MD_CTX
:
167 case BIO_C_SET_MD_CTX
:
169 BIO_set_data(b
, ptr
);
173 case BIO_C_DO_STATE_MACHINE
:
174 BIO_clear_retry_flags(b
);
175 ret
= BIO_ctrl(next
, cmd
, num
, ptr
);
176 BIO_copy_next_retry(b
);
181 ret
= EVP_DigestInit_ex(ctx
, md
, NULL
);
187 dctx
= BIO_get_data(dbio
);
188 if (!EVP_MD_CTX_copy_ex(dctx
, ctx
))
193 ret
= BIO_ctrl(next
, cmd
, num
, ptr
);
199 static long md_callback_ctrl(BIO
*b
, int cmd
, bio_info_cb
*fp
)
211 ret
= BIO_callback_ctrl(next
, cmd
, fp
);
217 static int md_gets(BIO
*bp
, char *buf
, int size
)
222 ctx
= BIO_get_data(bp
);
224 if (size
< ctx
->digest
->md_size
)
227 if (EVP_DigestFinal_ex(ctx
, (unsigned char *)buf
, &ret
) <= 0)