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. 8296341Sdelphij * 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). 15296341Sdelphij * 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. 22296341Sdelphij * 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 :-). 37296341Sdelphij * 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)" 40296341Sdelphij * 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. 52296341Sdelphij * 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) 70296341Sdelphij{ 71296341Sdelphij if (prompt == NULL) 72296341Sdelphij prompt_string[0] = '\0'; 73296341Sdelphij else { 74296341Sdelphij strncpy(prompt_string, prompt, 79); 75296341Sdelphij prompt_string[79] = '\0'; 76296341Sdelphij } 77296341Sdelphij} 7855714Skris 7955714Skrischar *EVP_get_pw_prompt(void) 80296341Sdelphij{ 81296341Sdelphij if (prompt_string[0] == '\0') 82296341Sdelphij return (NULL); 83296341Sdelphij else 84296341Sdelphij return (prompt_string); 85296341Sdelphij} 8655714Skris 87296341Sdelphij/* 88296341Sdelphij * For historical reasons, the standard function for reading passwords is in 89296341Sdelphij * the DES library -- if someone ever wants to disable DES, this function 90296341Sdelphij * will fail 91296341Sdelphij */ 9255714Skrisint EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) 93296341Sdelphij{ 94296341Sdelphij return EVP_read_pw_string_min(buf, 0, len, prompt, verify); 95296341Sdelphij} 96238405Sjkim 97296341Sdelphijint EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt, 98296341Sdelphij int verify) 99296341Sdelphij{ 100296341Sdelphij int ret; 101296341Sdelphij char buff[BUFSIZ]; 102296341Sdelphij UI *ui; 103109998Smarkm 104296341Sdelphij if ((prompt == NULL) && (prompt_string[0] != '\0')) 105296341Sdelphij prompt = prompt_string; 106296341Sdelphij ui = UI_new(); 107296341Sdelphij UI_add_input_string(ui, prompt, 0, buf, min, 108296341Sdelphij (len >= BUFSIZ) ? BUFSIZ - 1 : len); 109296341Sdelphij if (verify) 110296341Sdelphij UI_add_verify_string(ui, prompt, 0, 111296341Sdelphij buff, min, (len >= BUFSIZ) ? BUFSIZ - 1 : len, 112296341Sdelphij buf); 113296341Sdelphij ret = UI_process(ui); 114296341Sdelphij UI_free(ui); 115296341Sdelphij OPENSSL_cleanse(buff, BUFSIZ); 116296341Sdelphij return ret; 117296341Sdelphij} 11855714Skris 119296341Sdelphijint EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, 120296341Sdelphij const unsigned char *salt, const unsigned char *data, 121296341Sdelphij int datal, int count, unsigned char *key, 122296341Sdelphij unsigned char *iv) 123296341Sdelphij{ 124296341Sdelphij EVP_MD_CTX c; 125296341Sdelphij unsigned char md_buf[EVP_MAX_MD_SIZE]; 126296341Sdelphij int niv, nkey, addmd = 0; 127296341Sdelphij unsigned int mds = 0, i; 128296341Sdelphij int rv = 0; 129296341Sdelphij nkey = type->key_len; 130296341Sdelphij niv = type->iv_len; 131296341Sdelphij OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); 132296341Sdelphij OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); 13355714Skris 134296341Sdelphij if (data == NULL) 135296341Sdelphij return (nkey); 13655714Skris 137296341Sdelphij EVP_MD_CTX_init(&c); 138296341Sdelphij for (;;) { 139296341Sdelphij if (!EVP_DigestInit_ex(&c, md, NULL)) 140296341Sdelphij return 0; 141296341Sdelphij if (addmd++) 142296341Sdelphij if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) 143296341Sdelphij goto err; 144296341Sdelphij if (!EVP_DigestUpdate(&c, data, datal)) 145296341Sdelphij goto err; 146296341Sdelphij if (salt != NULL) 147296341Sdelphij if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN)) 148296341Sdelphij goto err; 149296341Sdelphij if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) 150296341Sdelphij goto err; 15155714Skris 152296341Sdelphij for (i = 1; i < (unsigned int)count; i++) { 153296341Sdelphij if (!EVP_DigestInit_ex(&c, md, NULL)) 154296341Sdelphij goto err; 155296341Sdelphij if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds)) 156296341Sdelphij goto err; 157296341Sdelphij if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds)) 158296341Sdelphij goto err; 159296341Sdelphij } 160296341Sdelphij i = 0; 161296341Sdelphij if (nkey) { 162296341Sdelphij for (;;) { 163296341Sdelphij if (nkey == 0) 164296341Sdelphij break; 165296341Sdelphij if (i == mds) 166296341Sdelphij break; 167296341Sdelphij if (key != NULL) 168296341Sdelphij *(key++) = md_buf[i]; 169296341Sdelphij nkey--; 170296341Sdelphij i++; 171296341Sdelphij } 172296341Sdelphij } 173296341Sdelphij if (niv && (i != mds)) { 174296341Sdelphij for (;;) { 175296341Sdelphij if (niv == 0) 176296341Sdelphij break; 177296341Sdelphij if (i == mds) 178296341Sdelphij break; 179296341Sdelphij if (iv != NULL) 180296341Sdelphij *(iv++) = md_buf[i]; 181296341Sdelphij niv--; 182296341Sdelphij i++; 183296341Sdelphij } 184296341Sdelphij } 185296341Sdelphij if ((nkey == 0) && (niv == 0)) 186296341Sdelphij break; 187296341Sdelphij } 188296341Sdelphij rv = type->key_len; 189296341Sdelphij err: 190296341Sdelphij EVP_MD_CTX_cleanup(&c); 191296341Sdelphij OPENSSL_cleanse(&(md_buf[0]), EVP_MAX_MD_SIZE); 192296341Sdelphij return rv; 193296341Sdelphij} 194