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Diffstat (limited to 'openssl/crypto/evp/bio_md.c')
| -rw-r--r-- | openssl/crypto/evp/bio_md.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/openssl/crypto/evp/bio_md.c b/openssl/crypto/evp/bio_md.c new file mode 100644 index 000000000..ed5c1135f --- /dev/null +++ b/openssl/crypto/evp/bio_md.c @@ -0,0 +1,264 @@ +/* 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) + { + EVP_DigestUpdate(ctx,(unsigned char *)out, + (unsigned int)ret); + } + } + 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) + { + EVP_DigestUpdate(ctx,(const unsigned char *)in, + (unsigned int)ret); + } + } + 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; + 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; + EVP_MD_CTX_copy_ex(dctx,ctx); + 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); + EVP_DigestFinal_ex(ctx,(unsigned char *)buf,&ret); + return((int)ret); + } + +/* +static int md_puts(bp,str) +BIO *bp; +char *str; + { + return(-1); + } +*/ + |