2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include <openssl/buffer.h>
13 #include <openssl/evp.h>
14 #include "internal/bio.h"
17 * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest
20 static int md_write(BIO *h, char const *buf, int num);
21 static int md_read(BIO *h, char *buf, int size);
22 static int md_gets(BIO *h, char *str, int size);
23 static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2);
24 static int md_new(BIO *h);
25 static int md_free(BIO *data);
26 static long md_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
28 static const BIO_METHOD methods_md = {
31 /* TODO: Convert to new style write function */
34 /* TODO: Convert to new style read function */
45 const BIO_METHOD *BIO_f_md(void)
50 static int md_new(BIO *bi)
54 ctx = EVP_MD_CTX_new();
59 BIO_set_data(bi, ctx);
64 static int md_free(BIO *a)
68 EVP_MD_CTX_free(BIO_get_data(a));
69 BIO_set_data(a, NULL);
75 static int md_read(BIO *b, char *out, int outl)
84 ctx = BIO_get_data(b);
87 if ((ctx == NULL) || (next == NULL))
90 ret = BIO_read(next, out, outl);
91 if (BIO_get_init(b)) {
93 if (EVP_DigestUpdate(ctx, (unsigned char *)out,
94 (unsigned int)ret) <= 0)
98 BIO_clear_retry_flags(b);
99 BIO_copy_next_retry(b);
103 static int md_write(BIO *b, const char *in, int inl)
109 if ((in == NULL) || (inl <= 0))
112 ctx = BIO_get_data(b);
114 if ((ctx != NULL) && (next != NULL))
115 ret = BIO_write(next, in, inl);
117 if (BIO_get_init(b)) {
119 if (!EVP_DigestUpdate(ctx, (const unsigned char *)in,
120 (unsigned int)ret)) {
121 BIO_clear_retry_flags(b);
127 BIO_clear_retry_flags(b);
128 BIO_copy_next_retry(b);
133 static long md_ctrl(BIO *b, int cmd, long num, void *ptr)
135 EVP_MD_CTX *ctx, *dctx, **pctx;
142 ctx = BIO_get_data(b);
148 ret = EVP_DigestInit_ex(ctx, EVP_MD_CTX_md(ctx), NULL);
152 ret = BIO_ctrl(next, cmd, num, ptr);
155 if (BIO_get_init(b)) {
157 *ppmd = EVP_MD_CTX_md(ctx);
161 case BIO_C_GET_MD_CTX:
166 case BIO_C_SET_MD_CTX:
168 BIO_set_data(b, ptr);
172 case BIO_C_DO_STATE_MACHINE:
173 BIO_clear_retry_flags(b);
174 ret = BIO_ctrl(next, cmd, num, ptr);
175 BIO_copy_next_retry(b);
180 ret = EVP_DigestInit_ex(ctx, md, NULL);
186 dctx = BIO_get_data(dbio);
187 if (!EVP_MD_CTX_copy_ex(dctx, ctx))
192 ret = BIO_ctrl(next, cmd, num, ptr);
198 static long md_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
210 ret = BIO_callback_ctrl(next, cmd, fp);
216 static int md_gets(BIO *bp, char *buf, int size)
221 ctx = BIO_get_data(bp);
223 if (size < EVP_MD_CTX_size(ctx))
226 if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0)