1*0Sstevel@tonic-gate /* crypto/evp/evp_key.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 "cryptlib.h" 61*0Sstevel@tonic-gate #include <openssl/x509.h> 62*0Sstevel@tonic-gate #include <openssl/objects.h> 63*0Sstevel@tonic-gate #include <openssl/evp.h> 64*0Sstevel@tonic-gate #include <openssl/ui.h> 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate /* should be init to zeros. */ 67*0Sstevel@tonic-gate static char prompt_string[80]; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate void EVP_set_pw_prompt(char *prompt) 70*0Sstevel@tonic-gate { 71*0Sstevel@tonic-gate if (prompt == NULL) 72*0Sstevel@tonic-gate prompt_string[0]='\0'; 73*0Sstevel@tonic-gate else 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate strncpy(prompt_string,prompt,79); 76*0Sstevel@tonic-gate prompt_string[79]='\0'; 77*0Sstevel@tonic-gate } 78*0Sstevel@tonic-gate } 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate char *EVP_get_pw_prompt(void) 81*0Sstevel@tonic-gate { 82*0Sstevel@tonic-gate if (prompt_string[0] == '\0') 83*0Sstevel@tonic-gate return(NULL); 84*0Sstevel@tonic-gate else 85*0Sstevel@tonic-gate return(prompt_string); 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #ifndef _BOOT 89*0Sstevel@tonic-gate /* For historical reasons, the standard function for reading passwords is 90*0Sstevel@tonic-gate * in the DES library -- if someone ever wants to disable DES, 91*0Sstevel@tonic-gate * this function will fail */ 92*0Sstevel@tonic-gate int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) 93*0Sstevel@tonic-gate { 94*0Sstevel@tonic-gate int ret; 95*0Sstevel@tonic-gate char buff[BUFSIZ]; 96*0Sstevel@tonic-gate UI *ui; 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate if ((prompt == NULL) && (prompt_string[0] != '\0')) 99*0Sstevel@tonic-gate prompt=prompt_string; 100*0Sstevel@tonic-gate ui = UI_new(); 101*0Sstevel@tonic-gate UI_add_input_string(ui,prompt,0,buf,0,(len>=BUFSIZ)?BUFSIZ-1:len); 102*0Sstevel@tonic-gate if (verify) 103*0Sstevel@tonic-gate UI_add_verify_string(ui,prompt,0, 104*0Sstevel@tonic-gate buff,0,(len>=BUFSIZ)?BUFSIZ-1:len,buf); 105*0Sstevel@tonic-gate ret = UI_process(ui); 106*0Sstevel@tonic-gate UI_free(ui); 107*0Sstevel@tonic-gate OPENSSL_cleanse(buff,BUFSIZ); 108*0Sstevel@tonic-gate return ret; 109*0Sstevel@tonic-gate } 110*0Sstevel@tonic-gate #endif /* !_BOOT */ 111*0Sstevel@tonic-gate 112*0Sstevel@tonic-gate int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, 113*0Sstevel@tonic-gate const unsigned char *salt, const unsigned char *data, int datal, 114*0Sstevel@tonic-gate int count, unsigned char *key, unsigned char *iv) 115*0Sstevel@tonic-gate { 116*0Sstevel@tonic-gate EVP_MD_CTX c; 117*0Sstevel@tonic-gate unsigned char md_buf[EVP_MAX_MD_SIZE]; 118*0Sstevel@tonic-gate int niv,nkey,addmd=0; 119*0Sstevel@tonic-gate unsigned int mds=0,i; 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate nkey=type->key_len; 122*0Sstevel@tonic-gate niv=type->iv_len; 123*0Sstevel@tonic-gate OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); 124*0Sstevel@tonic-gate OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate if (data == NULL) return(nkey); 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate EVP_MD_CTX_init(&c); 129*0Sstevel@tonic-gate for (;;) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate EVP_DigestInit_ex(&c,md, NULL); 132*0Sstevel@tonic-gate if (addmd++) 133*0Sstevel@tonic-gate EVP_DigestUpdate(&c,&(md_buf[0]),mds); 134*0Sstevel@tonic-gate EVP_DigestUpdate(&c,data,datal); 135*0Sstevel@tonic-gate if (salt != NULL) 136*0Sstevel@tonic-gate EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN); 137*0Sstevel@tonic-gate EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); 138*0Sstevel@tonic-gate 139*0Sstevel@tonic-gate for (i=1; i<(unsigned int)count; i++) 140*0Sstevel@tonic-gate { 141*0Sstevel@tonic-gate EVP_DigestInit_ex(&c,md, NULL); 142*0Sstevel@tonic-gate EVP_DigestUpdate(&c,&(md_buf[0]),mds); 143*0Sstevel@tonic-gate EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); 144*0Sstevel@tonic-gate } 145*0Sstevel@tonic-gate i=0; 146*0Sstevel@tonic-gate if (nkey) 147*0Sstevel@tonic-gate { 148*0Sstevel@tonic-gate for (;;) 149*0Sstevel@tonic-gate { 150*0Sstevel@tonic-gate if (nkey == 0) break; 151*0Sstevel@tonic-gate if (i == mds) break; 152*0Sstevel@tonic-gate if (key != NULL) 153*0Sstevel@tonic-gate *(key++)=md_buf[i]; 154*0Sstevel@tonic-gate nkey--; 155*0Sstevel@tonic-gate i++; 156*0Sstevel@tonic-gate } 157*0Sstevel@tonic-gate } 158*0Sstevel@tonic-gate if (niv && (i != mds)) 159*0Sstevel@tonic-gate { 160*0Sstevel@tonic-gate for (;;) 161*0Sstevel@tonic-gate { 162*0Sstevel@tonic-gate if (niv == 0) break; 163*0Sstevel@tonic-gate if (i == mds) break; 164*0Sstevel@tonic-gate if (iv != NULL) 165*0Sstevel@tonic-gate *(iv++)=md_buf[i]; 166*0Sstevel@tonic-gate niv--; 167*0Sstevel@tonic-gate i++; 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate } 170*0Sstevel@tonic-gate if ((nkey == 0) && (niv == 0)) break; 171*0Sstevel@tonic-gate } 172*0Sstevel@tonic-gate EVP_MD_CTX_cleanup(&c); 173*0Sstevel@tonic-gate OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE); 174*0Sstevel@tonic-gate return(type->key_len); 175*0Sstevel@tonic-gate } 176*0Sstevel@tonic-gate 177