--- /dev/null
+/* crypto/evp/bio_md.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "cryptlib.h"
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+
+/* BIO_put and BIO_get both add to the digest,
+ * BIO_gets returns the digest */
+
+static int md_write(BIO *h, char const *buf, int num);
+static int md_read(BIO *h, char *buf, int size);
+/*static int md_puts(BIO *h, const char *str); */
+static int md_gets(BIO *h, char *str, int size);
+static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int md_new(BIO *h);
+static int md_free(BIO *data);
+static long md_callback_ctrl(BIO *h,int cmd,bio_info_cb *fp);
+
+static BIO_METHOD methods_md=
+ {
+ BIO_TYPE_MD,"message digest",
+ md_write,
+ md_read,
+ NULL, /* md_puts, */
+ md_gets,
+ md_ctrl,
+ md_new,
+ md_free,
+ md_callback_ctrl,
+ };
+
+BIO_METHOD *BIO_f_md(void)
+ {
+ return(&methods_md);
+ }
+
+static int md_new(BIO *bi)
+ {
+ EVP_MD_CTX *ctx;
+
+ ctx=EVP_MD_CTX_create();
+ if (ctx == NULL) return(0);
+
+ bi->init=0;
+ bi->ptr=(char *)ctx;
+ bi->flags=0;
+ return(1);
+ }
+
+static int md_free(BIO *a)
+ {
+ if (a == NULL) return(0);
+ EVP_MD_CTX_destroy(a->ptr);
+ a->ptr=NULL;
+ a->init=0;
+ a->flags=0;
+ return(1);
+ }
+
+static int md_read(BIO *b, char *out, int outl)
+ {
+ int ret=0;
+ EVP_MD_CTX *ctx;
+
+ if (out == NULL) return(0);
+ ctx=b->ptr;
+
+ if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
+
+ ret=BIO_read(b->next_bio,out,outl);
+ if (b->init)
+ {
+ if (ret > 0)
+ {
+ if (EVP_DigestUpdate(ctx,(unsigned char *)out,
+ (unsigned int)ret)<=0) return (-1);
+ }
+ }
+ BIO_clear_retry_flags(b);
+ BIO_copy_next_retry(b);
+ return(ret);
+ }
+
+static int md_write(BIO *b, const char *in, int inl)
+ {
+ int ret=0;
+ EVP_MD_CTX *ctx;
+
+ if ((in == NULL) || (inl <= 0)) return(0);
+ ctx=b->ptr;
+
+ if ((ctx != NULL) && (b->next_bio != NULL))
+ ret=BIO_write(b->next_bio,in,inl);
+ if (b->init)
+ {
+ if (ret > 0)
+ {
+ if (!EVP_DigestUpdate(ctx,(const unsigned char *)in,
+ (unsigned int)ret))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
+ }
+ if(b->next_bio != NULL)
+ {
+ BIO_clear_retry_flags(b);
+ BIO_copy_next_retry(b);
+ }
+ return(ret);
+ }
+
+static long md_ctrl(BIO *b, int cmd, long num, void *ptr)
+ {
+ EVP_MD_CTX *ctx,*dctx,**pctx;
+ const EVP_MD **ppmd;
+ EVP_MD *md;
+ long ret=1;
+ BIO *dbio;
+
+ ctx=b->ptr;
+
+ switch (cmd)
+ {
+ case BIO_CTRL_RESET:
+ if (b->init)
+ ret = EVP_DigestInit_ex(ctx,ctx->digest, NULL);
+ else
+ ret=0;
+ if (ret > 0)
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ case BIO_C_GET_MD:
+ if (b->init)
+ {
+ ppmd=ptr;
+ *ppmd=ctx->digest;
+ }
+ else
+ ret=0;
+ break;
+ case BIO_C_GET_MD_CTX:
+ pctx=ptr;
+ *pctx=ctx;
+ b->init = 1;
+ break;
+ case BIO_C_SET_MD_CTX:
+ if (b->init)
+ b->ptr=ptr;
+ else
+ ret=0;
+ break;
+ case BIO_C_DO_STATE_MACHINE:
+ BIO_clear_retry_flags(b);
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ BIO_copy_next_retry(b);
+ break;
+
+ case BIO_C_SET_MD:
+ md=ptr;
+ ret = EVP_DigestInit_ex(ctx,md, NULL);
+ if (ret > 0)
+ b->init=1;
+ break;
+ case BIO_CTRL_DUP:
+ dbio=ptr;
+ dctx=dbio->ptr;
+ if (!EVP_MD_CTX_copy_ex(dctx,ctx))
+ return 0;
+ b->init=1;
+ break;
+ default:
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ }
+ return(ret);
+ }
+
+static long md_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
+ {
+ long ret=1;
+
+ if (b->next_bio == NULL) return(0);
+ switch (cmd)
+ {
+ default:
+ ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
+ break;
+ }
+ return(ret);
+ }
+
+static int md_gets(BIO *bp, char *buf, int size)
+ {
+ EVP_MD_CTX *ctx;
+ unsigned int ret;
+
+
+ ctx=bp->ptr;
+ if (size < ctx->digest->md_size)
+ return(0);
+ if (EVP_DigestFinal_ex(ctx,(unsigned char *)buf,&ret)<=0)
+ return -1;
+
+ return((int)ret);
+ }
+
+/*
+static int md_puts(bp,str)
+BIO *bp;
+char *str;
+ {
+ return(-1);
+ }
+*/
+
projects / cassiopeia.git / blobdiff