155714Skris/* crypto/evp/evp_key.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296465Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296465Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/x509.h> 6255714Skris#include <openssl/objects.h> 6355714Skris#include <openssl/evp.h> 64109998Smarkm#include <openssl/ui.h> 6555714Skris 6655714Skris/* should be init to zeros. */ 6755714Skrisstatic char prompt_string[80]; 6855714Skris 69160814Ssimonvoid EVP_set_pw_prompt(const char *prompt) 70296465Sdelphij{ 71296465Sdelphij if (prompt == NULL) 72296465Sdelphij prompt_string[0] = '\0'; 73296465Sdelphij else { 74296465Sdelphij strncpy(prompt_string, prompt, 79); 75296465Sdelphij prompt_string[79] = '\0'; 76296465Sdelphij } 77296465Sdelphij} 7855714Skris 7955714Skrischar *EVP_get_pw_prompt(void) 80296465Sdelphij{ 81296465Sdelphij if (prompt_string[0] == '\0') 82296465Sdelphij return (NULL); 83296465Sdelphij else 84296465Sdelphij return (prompt_string); 85296465Sdelphij} 8655714Skris 87296465Sdelphij/* 88296465Sdelphij * For historical reasons, the standard function for reading passwords is in 89296465Sdelphij * the DES library -- if someone ever wants to disable DES, this function 90296465Sdelphij * will fail 91296465Sdelphij */ 9255714Skrisint EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) 93296465Sdelphij{ 94296465Sdelphij int ret; 95296465Sdelphij char buff[BUFSIZ]; 96296465Sdelphij UI *ui; 97109998Smarkm 98296465Sdelphij if ((prompt == NULL) && (prompt_string[0] != '\0')) 99296465Sdelphij prompt = prompt_string; 100296465Sdelphij ui = UI_new(); 101296465Sdelphij UI_add_input_string(ui, prompt, 0, buf, 0, 102296465Sdelphij (len >= BUFSIZ) ? BUFSIZ - 1 : len); 103296465Sdelphij if (verify) 104296465Sdelphij UI_add_verify_string(ui, prompt, 0, 105296465Sdelphij buff, 0, (len >= BUFSIZ) ? BUFSIZ - 1 : len, 106296465Sdelphij buf); 107296465Sdelphij ret = UI_process(ui); 108296465Sdelphij UI_free(ui); 109296465Sdelphij OPENSSL_cleanse(buff, BUFSIZ); 110296465Sdelphij return ret; 111296465Sdelphij} 11255714Skris 113296465Sdelphijint EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, 114296465Sdelphij const unsigned char *salt, const unsigned char *data, 115296465Sdelphij int datal, int count, unsigned char *key, 116296465Sdelphij unsigned char *iv) 117296465Sdelphij{ 118296465Sdelphij EVP_MD_CTX c; 119296465Sdelphij unsigned char md_buf[EVP_MAX_MD_SIZE]; 120296465Sdelphij int niv, nkey, addmd = 0; 121296465Sdelphij unsigned int mds = 0, i; 12255714Skris 123296465Sdelphij nkey = type->key_len; 124296465Sdelphij niv = type->iv_len; 125296465Sdelphij OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); 126296465Sdelphij OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); 12755714Skris 128296465Sdelphij if (data == NULL) 129296465Sdelphij return (nkey); 13055714Skris 131296465Sdelphij EVP_MD_CTX_init(&c); 132296465Sdelphij for (;;) { 133296465Sdelphij if (!EVP_DigestInit_ex(&c, md, NULL)) 134296465Sdelphij return 0; 135296465Sdelphij if (addmd++) 136296465Sdelphij EVP_DigestUpdate(&c, &(md_buf[0]), mds); 137296465Sdelphij EVP_DigestUpdate(&c, data, datal); 138296465Sdelphij if (salt != NULL) 139296465Sdelphij EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN); 140296465Sdelphij EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds); 14155714Skris 142296465Sdelphij for (i = 1; i < (unsigned int)count; i++) { 143296465Sdelphij EVP_DigestInit_ex(&c, md, NULL); 144296465Sdelphij EVP_DigestUpdate(&c, &(md_buf[0]), mds); 145296465Sdelphij EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds); 146296465Sdelphij } 147296465Sdelphij i = 0; 148296465Sdelphij if (nkey) { 149296465Sdelphij for (;;) { 150296465Sdelphij if (nkey == 0) 151296465Sdelphij break; 152296465Sdelphij if (i == mds) 153296465Sdelphij break; 154296465Sdelphij if (key != NULL) 155296465Sdelphij *(key++) = md_buf[i]; 156296465Sdelphij nkey--; 157296465Sdelphij i++; 158296465Sdelphij } 159296465Sdelphij } 160296465Sdelphij if (niv && (i != mds)) { 161296465Sdelphij for (;;) { 162296465Sdelphij if (niv == 0) 163296465Sdelphij break; 164296465Sdelphij if (i == mds) 165296465Sdelphij break; 166296465Sdelphij if (iv != NULL) 167296465Sdelphij *(iv++) = md_buf[i]; 168296465Sdelphij niv--; 169296465Sdelphij i++; 170296465Sdelphij } 171296465Sdelphij } 172296465Sdelphij if ((nkey == 0) && (niv == 0)) 173296465Sdelphij break; 174296465Sdelphij } 175296465Sdelphij EVP_MD_CTX_cleanup(&c); 176296465Sdelphij OPENSSL_cleanse(&(md_buf[0]), EVP_MAX_MD_SIZE); 177296465Sdelphij return (type->key_len); 178296465Sdelphij} 179