/* crypto/evp/evp_key.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include "cryptlib.h" #include <openssl/x509.h> #include <openssl/objects.h> #include <openssl/evp.h> /* should be init to zeros. */ static char prompt_string[80]; void EVP_set_pw_prompt(char *prompt) { if (prompt == NULL) prompt_string[0]='\0'; else strncpy(prompt_string,prompt,79); } char *EVP_get_pw_prompt(void) { if (prompt_string[0] == '\0') return(NULL); else return(prompt_string); } /* For historical reasons, the standard function for reading passwords is * in the DES library -- if someone ever wants to disable DES, * this function will fail */ int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) { #ifndef NO_DES if ((prompt == NULL) && (prompt_string[0] != '\0')) prompt=prompt_string; return(des_read_pw_string(buf,len,prompt,verify)); #else return -1; #endif } int EVP_BytesToKey(const EVP_CIPHER *type, EVP_MD *md, const unsigned char *salt, const unsigned char *data, int datal, int count, unsigned char *key, unsigned char *iv) { EVP_MD_CTX c; unsigned char md_buf[EVP_MAX_MD_SIZE]; int niv,nkey,addmd=0; unsigned int mds=0,i; nkey=type->key_len; niv=type->iv_len; if (data == NULL) return(nkey); for (;;) { EVP_DigestInit(&c,md); if (addmd++) EVP_DigestUpdate(&c,&(md_buf[0]),mds); EVP_DigestUpdate(&c,data,datal); if (salt != NULL) EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN); EVP_DigestFinal(&c,&(md_buf[0]),&mds); for (i=1; i<(unsigned int)count; i++) { EVP_DigestInit(&c,md); EVP_DigestUpdate(&c,&(md_buf[0]),mds); EVP_DigestFinal(&c,&(md_buf[0]),&mds); } i=0; if (nkey) { for (;;) { if (nkey == 0) break; if (i == mds) break; if (key != NULL) *(key++)=md_buf[i]; nkey--; i++; } } if (niv && (i != mds)) { for (;;) { if (niv == 0) break; if (i == mds) break; if (iv != NULL) *(iv++)=md_buf[i]; niv--; i++; } } if ((nkey == 0) && (niv == 0)) break; } OPENSSL_cleanse(&c,sizeof(c)); OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE); return(type->key_len); }