sl@0: /* crypto/evp/evp_key.c */ sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) sl@0: * All rights reserved. sl@0: * sl@0: * This package is an SSL implementation written sl@0: * by Eric Young (eay@cryptsoft.com). sl@0: * The implementation was written so as to conform with Netscapes SSL. sl@0: * sl@0: * This library is free for commercial and non-commercial use as long as sl@0: * the following conditions are aheared to. The following conditions sl@0: * apply to all code found in this distribution, be it the RC4, RSA, sl@0: * lhash, DES, etc., code; not just the SSL code. The SSL documentation sl@0: * included with this distribution is covered by the same copyright terms sl@0: * except that the holder is Tim Hudson (tjh@cryptsoft.com). sl@0: * sl@0: * Copyright remains Eric Young's, and as such any Copyright notices in sl@0: * the code are not to be removed. sl@0: * If this package is used in a product, Eric Young should be given attribution sl@0: * as the author of the parts of the library used. sl@0: * This can be in the form of a textual message at program startup or sl@0: * in documentation (online or textual) provided with the package. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * 3. All advertising materials mentioning features or use of this software sl@0: * must display the following acknowledgement: sl@0: * "This product includes cryptographic software written by sl@0: * Eric Young (eay@cryptsoft.com)" sl@0: * The word 'cryptographic' can be left out if the rouines from the library sl@0: * being used are not cryptographic related :-). sl@0: * 4. If you include any Windows specific code (or a derivative thereof) from sl@0: * the apps directory (application code) you must include an acknowledgement: sl@0: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * The licence and distribution terms for any publically available version or sl@0: * derivative of this code cannot be changed. i.e. this code cannot simply be sl@0: * copied and put under another distribution licence sl@0: * [including the GNU Public Licence.] sl@0: */ sl@0: /* sl@0: © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. sl@0: */ sl@0: sl@0: sl@0: #include sl@0: #include "cryptlib.h" sl@0: #include sl@0: #include sl@0: #include sl@0: #include sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) sl@0: #include "libcrypto_wsd_macros.h" sl@0: #include "libcrypto_wsd.h" sl@0: #endif sl@0: sl@0: #ifndef EMULATOR sl@0: /* should be init to zeros. */ sl@0: static char prompt_string[80]; sl@0: #else sl@0: GET_STATIC_ARRAY_FROM_TLS(prompt_string,evp_key,char) sl@0: #define prompt_string (GET_WSD_VAR_NAME(prompt_string,evp_key, s)()) sl@0: #endif sl@0: sl@0: EXPORT_C void EVP_set_pw_prompt(const char *prompt) sl@0: { sl@0: if (prompt == NULL) sl@0: prompt_string[0]='\0'; sl@0: else sl@0: { sl@0: strncpy(prompt_string,prompt,79); sl@0: prompt_string[79]='\0'; sl@0: } sl@0: } sl@0: sl@0: EXPORT_C char *EVP_get_pw_prompt(void) sl@0: { sl@0: if (prompt_string[0] == '\0') sl@0: return(NULL); sl@0: else sl@0: return(prompt_string); sl@0: } sl@0: sl@0: /* For historical reasons, the standard function for reading passwords is sl@0: * in the DES library -- if someone ever wants to disable DES, sl@0: * this function will fail */ sl@0: EXPORT_C int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify) sl@0: { sl@0: int ret; sl@0: char buff[BUFSIZ]; sl@0: UI *ui; sl@0: sl@0: if ((prompt == NULL) && (prompt_string[0] != '\0')) sl@0: prompt=prompt_string; sl@0: ui = UI_new(); sl@0: UI_add_input_string(ui,prompt,0,buf,0,(len>=BUFSIZ)?BUFSIZ-1:len); sl@0: if (verify) sl@0: UI_add_verify_string(ui,prompt,0, sl@0: buff,0,(len>=BUFSIZ)?BUFSIZ-1:len,buf); sl@0: ret = UI_process(ui); sl@0: UI_free(ui); sl@0: OPENSSL_cleanse(buff,BUFSIZ); sl@0: return ret; sl@0: } sl@0: sl@0: EXPORT_C int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, sl@0: const unsigned char *salt, const unsigned char *data, int datal, sl@0: int count, unsigned char *key, unsigned char *iv) sl@0: { sl@0: EVP_MD_CTX c; sl@0: unsigned char md_buf[EVP_MAX_MD_SIZE]; sl@0: int niv,nkey,addmd=0; sl@0: unsigned int mds=0,i; sl@0: sl@0: nkey=type->key_len; sl@0: niv=type->iv_len; sl@0: OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); sl@0: OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); sl@0: sl@0: if (data == NULL) return(nkey); sl@0: sl@0: EVP_MD_CTX_init(&c); sl@0: for (;;) sl@0: { sl@0: if (!EVP_DigestInit_ex(&c,md, NULL)) sl@0: return 0; sl@0: if (addmd++) sl@0: EVP_DigestUpdate(&c,&(md_buf[0]),mds); sl@0: EVP_DigestUpdate(&c,data,datal); sl@0: if (salt != NULL) sl@0: EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN); sl@0: EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); sl@0: sl@0: for (i=1; i<(unsigned int)count; i++) sl@0: { sl@0: EVP_DigestInit_ex(&c,md, NULL); sl@0: EVP_DigestUpdate(&c,&(md_buf[0]),mds); sl@0: EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds); sl@0: } sl@0: i=0; sl@0: if (nkey) sl@0: { sl@0: for (;;) sl@0: { sl@0: if (nkey == 0) break; sl@0: if (i == mds) break; sl@0: if (key != NULL) sl@0: *(key++)=md_buf[i]; sl@0: nkey--; sl@0: i++; sl@0: } sl@0: } sl@0: if (niv && (i != mds)) sl@0: { sl@0: for (;;) sl@0: { sl@0: if (niv == 0) break; sl@0: if (i == mds) break; sl@0: if (iv != NULL) sl@0: *(iv++)=md_buf[i]; sl@0: niv--; sl@0: i++; sl@0: } sl@0: } sl@0: if ((nkey == 0) && (niv == 0)) break; sl@0: } sl@0: EVP_MD_CTX_cleanup(&c); sl@0: OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE); sl@0: return(type->key_len); sl@0: } sl@0: