1*0Sstevel@tonic-gate /* crypto/evp/bio_md.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include <stdio.h> 60*0Sstevel@tonic-gate #include <errno.h> 61*0Sstevel@tonic-gate #include "cryptlib.h" 62*0Sstevel@tonic-gate #include <openssl/buffer.h> 63*0Sstevel@tonic-gate #include <openssl/evp.h> 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate /* BIO_put and BIO_get both add to the digest, 66*0Sstevel@tonic-gate * BIO_gets returns the digest */ 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate static int md_write(BIO *h, char const *buf, int num); 69*0Sstevel@tonic-gate static int md_read(BIO *h, char *buf, int size); 70*0Sstevel@tonic-gate /*static int md_puts(BIO *h, const char *str); */ 71*0Sstevel@tonic-gate static int md_gets(BIO *h, char *str, int size); 72*0Sstevel@tonic-gate static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2); 73*0Sstevel@tonic-gate static int md_new(BIO *h); 74*0Sstevel@tonic-gate static int md_free(BIO *data); 75*0Sstevel@tonic-gate static long md_callback_ctrl(BIO *h,int cmd,bio_info_cb *fp); 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate static BIO_METHOD methods_md= 78*0Sstevel@tonic-gate { 79*0Sstevel@tonic-gate BIO_TYPE_MD,"message digest", 80*0Sstevel@tonic-gate md_write, 81*0Sstevel@tonic-gate md_read, 82*0Sstevel@tonic-gate NULL, /* md_puts, */ 83*0Sstevel@tonic-gate md_gets, 84*0Sstevel@tonic-gate md_ctrl, 85*0Sstevel@tonic-gate md_new, 86*0Sstevel@tonic-gate md_free, 87*0Sstevel@tonic-gate md_callback_ctrl, 88*0Sstevel@tonic-gate }; 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate BIO_METHOD *BIO_f_md(void) 91*0Sstevel@tonic-gate { 92*0Sstevel@tonic-gate return(&methods_md); 93*0Sstevel@tonic-gate } 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate static int md_new(BIO *bi) 96*0Sstevel@tonic-gate { 97*0Sstevel@tonic-gate EVP_MD_CTX *ctx; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate ctx=EVP_MD_CTX_create(); 100*0Sstevel@tonic-gate if (ctx == NULL) return(0); 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate bi->init=0; 103*0Sstevel@tonic-gate bi->ptr=(char *)ctx; 104*0Sstevel@tonic-gate bi->flags=0; 105*0Sstevel@tonic-gate return(1); 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate static int md_free(BIO *a) 109*0Sstevel@tonic-gate { 110*0Sstevel@tonic-gate if (a == NULL) return(0); 111*0Sstevel@tonic-gate EVP_MD_CTX_destroy(a->ptr); 112*0Sstevel@tonic-gate a->ptr=NULL; 113*0Sstevel@tonic-gate a->init=0; 114*0Sstevel@tonic-gate a->flags=0; 115*0Sstevel@tonic-gate return(1); 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate static int md_read(BIO *b, char *out, int outl) 119*0Sstevel@tonic-gate { 120*0Sstevel@tonic-gate int ret=0; 121*0Sstevel@tonic-gate EVP_MD_CTX *ctx; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate if (out == NULL) return(0); 124*0Sstevel@tonic-gate ctx=b->ptr; 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate if ((ctx == NULL) || (b->next_bio == NULL)) return(0); 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate ret=BIO_read(b->next_bio,out,outl); 129*0Sstevel@tonic-gate if (b->init) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate if (ret > 0) 132*0Sstevel@tonic-gate { 133*0Sstevel@tonic-gate EVP_DigestUpdate(ctx,(unsigned char *)out, 134*0Sstevel@tonic-gate (unsigned int)ret); 135*0Sstevel@tonic-gate } 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate BIO_clear_retry_flags(b); 138*0Sstevel@tonic-gate BIO_copy_next_retry(b); 139*0Sstevel@tonic-gate return(ret); 140*0Sstevel@tonic-gate } 141*0Sstevel@tonic-gate 142*0Sstevel@tonic-gate static int md_write(BIO *b, const char *in, int inl) 143*0Sstevel@tonic-gate { 144*0Sstevel@tonic-gate int ret=0; 145*0Sstevel@tonic-gate EVP_MD_CTX *ctx; 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate if ((in == NULL) || (inl <= 0)) return(0); 148*0Sstevel@tonic-gate ctx=b->ptr; 149*0Sstevel@tonic-gate 150*0Sstevel@tonic-gate if ((ctx != NULL) && (b->next_bio != NULL)) 151*0Sstevel@tonic-gate ret=BIO_write(b->next_bio,in,inl); 152*0Sstevel@tonic-gate if (b->init) 153*0Sstevel@tonic-gate { 154*0Sstevel@tonic-gate if (ret > 0) 155*0Sstevel@tonic-gate { 156*0Sstevel@tonic-gate EVP_DigestUpdate(ctx,(unsigned char *)in, 157*0Sstevel@tonic-gate (unsigned int)ret); 158*0Sstevel@tonic-gate } 159*0Sstevel@tonic-gate } 160*0Sstevel@tonic-gate BIO_clear_retry_flags(b); 161*0Sstevel@tonic-gate BIO_copy_next_retry(b); 162*0Sstevel@tonic-gate return(ret); 163*0Sstevel@tonic-gate } 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate static long md_ctrl(BIO *b, int cmd, long num, void *ptr) 166*0Sstevel@tonic-gate { 167*0Sstevel@tonic-gate EVP_MD_CTX *ctx,*dctx,**pctx; 168*0Sstevel@tonic-gate const EVP_MD **ppmd; 169*0Sstevel@tonic-gate EVP_MD *md; 170*0Sstevel@tonic-gate long ret=1; 171*0Sstevel@tonic-gate BIO *dbio; 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate ctx=b->ptr; 174*0Sstevel@tonic-gate 175*0Sstevel@tonic-gate switch (cmd) 176*0Sstevel@tonic-gate { 177*0Sstevel@tonic-gate case BIO_CTRL_RESET: 178*0Sstevel@tonic-gate if (b->init) 179*0Sstevel@tonic-gate EVP_DigestInit_ex(ctx,ctx->digest, NULL); 180*0Sstevel@tonic-gate else 181*0Sstevel@tonic-gate ret=0; 182*0Sstevel@tonic-gate ret=BIO_ctrl(b->next_bio,cmd,num,ptr); 183*0Sstevel@tonic-gate break; 184*0Sstevel@tonic-gate case BIO_C_GET_MD: 185*0Sstevel@tonic-gate if (b->init) 186*0Sstevel@tonic-gate { 187*0Sstevel@tonic-gate ppmd=ptr; 188*0Sstevel@tonic-gate *ppmd=ctx->digest; 189*0Sstevel@tonic-gate } 190*0Sstevel@tonic-gate else 191*0Sstevel@tonic-gate ret=0; 192*0Sstevel@tonic-gate break; 193*0Sstevel@tonic-gate case BIO_C_GET_MD_CTX: 194*0Sstevel@tonic-gate if (b->init) 195*0Sstevel@tonic-gate { 196*0Sstevel@tonic-gate pctx=ptr; 197*0Sstevel@tonic-gate *pctx=ctx; 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate else 200*0Sstevel@tonic-gate ret=0; 201*0Sstevel@tonic-gate break; 202*0Sstevel@tonic-gate case BIO_C_DO_STATE_MACHINE: 203*0Sstevel@tonic-gate BIO_clear_retry_flags(b); 204*0Sstevel@tonic-gate ret=BIO_ctrl(b->next_bio,cmd,num,ptr); 205*0Sstevel@tonic-gate BIO_copy_next_retry(b); 206*0Sstevel@tonic-gate break; 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate case BIO_C_SET_MD: 209*0Sstevel@tonic-gate md=ptr; 210*0Sstevel@tonic-gate EVP_DigestInit_ex(ctx,md, NULL); 211*0Sstevel@tonic-gate b->init=1; 212*0Sstevel@tonic-gate break; 213*0Sstevel@tonic-gate case BIO_CTRL_DUP: 214*0Sstevel@tonic-gate dbio=ptr; 215*0Sstevel@tonic-gate dctx=dbio->ptr; 216*0Sstevel@tonic-gate EVP_MD_CTX_copy_ex(dctx,ctx); 217*0Sstevel@tonic-gate b->init=1; 218*0Sstevel@tonic-gate break; 219*0Sstevel@tonic-gate default: 220*0Sstevel@tonic-gate ret=BIO_ctrl(b->next_bio,cmd,num,ptr); 221*0Sstevel@tonic-gate break; 222*0Sstevel@tonic-gate } 223*0Sstevel@tonic-gate return(ret); 224*0Sstevel@tonic-gate } 225*0Sstevel@tonic-gate 226*0Sstevel@tonic-gate static long md_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) 227*0Sstevel@tonic-gate { 228*0Sstevel@tonic-gate long ret=1; 229*0Sstevel@tonic-gate 230*0Sstevel@tonic-gate if (b->next_bio == NULL) return(0); 231*0Sstevel@tonic-gate switch (cmd) 232*0Sstevel@tonic-gate { 233*0Sstevel@tonic-gate default: 234*0Sstevel@tonic-gate ret=BIO_callback_ctrl(b->next_bio,cmd,fp); 235*0Sstevel@tonic-gate break; 236*0Sstevel@tonic-gate } 237*0Sstevel@tonic-gate return(ret); 238*0Sstevel@tonic-gate } 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate static int md_gets(BIO *bp, char *buf, int size) 241*0Sstevel@tonic-gate { 242*0Sstevel@tonic-gate EVP_MD_CTX *ctx; 243*0Sstevel@tonic-gate unsigned int ret; 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate ctx=bp->ptr; 247*0Sstevel@tonic-gate if (size < ctx->digest->md_size) 248*0Sstevel@tonic-gate return(0); 249*0Sstevel@tonic-gate EVP_DigestFinal_ex(ctx,(unsigned char *)buf,&ret); 250*0Sstevel@tonic-gate return((int)ret); 251*0Sstevel@tonic-gate } 252*0Sstevel@tonic-gate 253*0Sstevel@tonic-gate /* 254*0Sstevel@tonic-gate static int md_puts(bp,str) 255*0Sstevel@tonic-gate BIO *bp; 256*0Sstevel@tonic-gate char *str; 257*0Sstevel@tonic-gate { 258*0Sstevel@tonic-gate return(-1); 259*0Sstevel@tonic-gate } 260*0Sstevel@tonic-gate */ 261*0Sstevel@tonic-gate 262