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);
25 static int md_gets(BIO *h, char *str, int size);
26 static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2);
27 static int md_new(BIO *h);
28 static int md_free(BIO *data);
29 static long md_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
31 static const BIO_METHOD methods_md = {
34 /* TODO: Convert to new style write function */
37 /* TODO: Convert to new style read function */
48 const BIO_METHOD *BIO_f_md(void)
53 static int md_new(BIO *bi)
57 ctx = EVP_MD_CTX_new();
62 BIO_set_data(bi, ctx);
67 static int md_free(BIO *a)
71 EVP_MD_CTX_free(BIO_get_data(a));
72 BIO_set_data(a, NULL);
78 static int md_read(BIO *b, char *out, int outl)
87 ctx = BIO_get_data(b);
90 if ((ctx == NULL) || (next == NULL))
93 ret = BIO_read(next, out, outl);
94 if (BIO_get_init(b)) {
96 if (EVP_DigestUpdate(ctx, (unsigned char *)out,
97 (unsigned int)ret) <= 0)
101 BIO_clear_retry_flags(b);
102 BIO_copy_next_retry(b);
106 static int md_write(BIO *b, const char *in, int inl)
112 if ((in == NULL) || (inl <= 0))
115 ctx = BIO_get_data(b);
117 if ((ctx != NULL) && (next != NULL))
118 ret = BIO_write(next, in, inl);
120 if (BIO_get_init(b)) {
122 if (!EVP_DigestUpdate(ctx, (const unsigned char *)in,
123 (unsigned int)ret)) {
124 BIO_clear_retry_flags(b);
130 BIO_clear_retry_flags(b);
131 BIO_copy_next_retry(b);
136 static long md_ctrl(BIO *b, int cmd, long num, void *ptr)
138 EVP_MD_CTX *ctx, *dctx, **pctx;
145 ctx = BIO_get_data(b);
151 ret = EVP_DigestInit_ex(ctx, ctx->digest, NULL);
155 ret = BIO_ctrl(next, cmd, num, ptr);
158 if (BIO_get_init(b)) {
164 case BIO_C_GET_MD_CTX:
169 case BIO_C_SET_MD_CTX:
171 BIO_set_data(b, ptr);
175 case BIO_C_DO_STATE_MACHINE:
176 BIO_clear_retry_flags(b);
177 ret = BIO_ctrl(next, cmd, num, ptr);
178 BIO_copy_next_retry(b);
183 ret = EVP_DigestInit_ex(ctx, md, NULL);
189 dctx = BIO_get_data(dbio);
190 if (!EVP_MD_CTX_copy_ex(dctx, ctx))
195 ret = BIO_ctrl(next, cmd, num, ptr);
201 static long md_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
213 ret = BIO_callback_ctrl(next, cmd, fp);
219 static int md_gets(BIO *bp, char *buf, int size)
224 ctx = BIO_get_data(bp);
226 if (size < ctx->digest->md_size)
229 if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0)