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. 8280304Sjkim * 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). 15280304Sjkim * 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. 22280304Sjkim * 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 :-). 37280304Sjkim * 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)" 40280304Sjkim * 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. 52280304Sjkim * 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) 70280304Sjkim{ 71280304Sjkim if (prompt == NULL) 72280304Sjkim prompt_string[0] = '\0'; 73280304Sjkim else { 74280304Sjkim strncpy(prompt_string, prompt, 79); 75280304Sjkim prompt_string[79] = '\0'; 76280304Sjkim } 77280304Sjkim} 7855714Skris 7955714Skrischar *EVP_get_pw_prompt(void) 80280304Sjkim{ 81280304Sjkim if (prompt_string[0] == '\0') 82280304Sjkim return (NULL); 83280304Sjkim else 84280304Sjkim return (prompt_string); 85280304Sjkim} 8655714Skris 87280304Sjkim/* 88280304Sjkim * For historical reasons, the standard function for reading passwords is in 89280304Sjkim * the DES library -- if someone ever wants to disable DES, this function 90280304Sjkim * will fail 91280304Sjkim */ 9255714Skrisint EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) 93280304Sjkim{ 94280304Sjkim return EVP_read_pw_string_min(buf, 0, len, prompt, verify); 95280304Sjkim} 96238405Sjkim 97280304Sjkimint EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt, 98280304Sjkim int verify) 99280304Sjkim{ 100280304Sjkim int ret; 101280304Sjkim char buff[BUFSIZ]; 102280304Sjkim UI *ui; 103109998Smarkm 104280304Sjkim if ((prompt == NULL) && (prompt_string[0] != '\0')) 105280304Sjkim prompt = prompt_string; 106280304Sjkim ui = UI_new(); 107291721Sjkim if (ui == NULL) 108291721Sjkim return -1; 109280304Sjkim UI_add_input_string(ui, prompt, 0, buf, min, 110280304Sjkim (len >= BUFSIZ) ? BUFSIZ - 1 : len); 111280304Sjkim if (verify) 112280304Sjkim UI_add_verify_string(ui, prompt, 0, 113280304Sjkim buff, min, (len >= BUFSIZ) ? BUFSIZ - 1 : len, 114280304Sjkim buf); 115280304Sjkim ret = UI_process(ui); 116280304Sjkim UI_free(ui); 117280304Sjkim OPENSSL_cleanse(buff, BUFSIZ); 118280304Sjkim return ret; 119280304Sjkim} 12055714Skris 121280304Sjkimint EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, 122280304Sjkim const unsigned char *salt, const unsigned char *data, 123280304Sjkim int datal, int count, unsigned char *key, 124280304Sjkim unsigned char *iv) 125280304Sjkim{ 126280304Sjkim EVP_MD_CTX c; 127280304Sjkim unsigned char md_buf[EVP_MAX_MD_SIZE]; 128280304Sjkim int niv, nkey, addmd = 0; 129280304Sjkim unsigned int mds = 0, i; 130280304Sjkim int rv = 0; 131280304Sjkim nkey = type->key_len; 132280304Sjkim niv = type->iv_len; 133280304Sjkim OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); 134280304Sjkim OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); 13555714Skris 136280304Sjkim if (data == NULL) 137280304Sjkim return (nkey); 13855714Skris 139280304Sjkim EVP_MD_CTX_init(&c); 140280304Sjkim for (;;) { 141280304Sjkim if (!EVP_DigestInit_ex(&c, md, NULL)) 142291721Sjkim goto err; 143280304Sjkim if (addmd++) 144280304Sjkim if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) 145280304Sjkim goto err; 146280304Sjkim if (!EVP_DigestUpdate(&c, data, datal)) 147280304Sjkim goto err; 148280304Sjkim if (salt != NULL) 149280304Sjkim if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN)) 150280304Sjkim goto err; 151280304Sjkim if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) 152280304Sjkim goto err; 15355714Skris 154280304Sjkim for (i = 1; i < (unsigned int)count; i++) { 155280304Sjkim if (!EVP_DigestInit_ex(&c, md, NULL)) 156280304Sjkim goto err; 157280304Sjkim if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) 158280304Sjkim goto err; 159280304Sjkim if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) 160280304Sjkim goto err; 161280304Sjkim } 162280304Sjkim i = 0; 163280304Sjkim if (nkey) { 164280304Sjkim for (;;) { 165280304Sjkim if (nkey == 0) 166280304Sjkim break; 167280304Sjkim if (i == mds) 168280304Sjkim break; 169280304Sjkim if (key != NULL) 170280304Sjkim *(key++) = md_buf[i]; 171280304Sjkim nkey--; 172280304Sjkim i++; 173280304Sjkim } 174280304Sjkim } 175280304Sjkim if (niv && (i != mds)) { 176280304Sjkim for (;;) { 177280304Sjkim if (niv == 0) 178280304Sjkim break; 179280304Sjkim if (i == mds) 180280304Sjkim break; 181280304Sjkim if (iv != NULL) 182280304Sjkim *(iv++) = md_buf[i]; 183280304Sjkim niv--; 184280304Sjkim i++; 185280304Sjkim } 186280304Sjkim } 187280304Sjkim if ((nkey == 0) && (niv == 0)) 188280304Sjkim break; 189280304Sjkim } 190280304Sjkim rv = type->key_len; 191280304Sjkim err: 192280304Sjkim EVP_MD_CTX_cleanup(&c); 193291721Sjkim OPENSSL_cleanse(md_buf, sizeof(md_buf)); 194280304Sjkim return rv; 195280304Sjkim} 196