X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fevp_key.c;h=670276d1dc9c4c7bf61de3f2f42d6908766105b0;hp=898ff6f1e597040453c43eda7d41ebb2b044899d;hb=b96dba9e5ec7afc355be1eab915f69c8c0d51741;hpb=5e4430e70df0020f5f1517249851696cb9ac4ad2 diff --git a/crypto/evp/evp_key.c b/crypto/evp/evp_key.c index 898ff6f1e5..670276d1dc 100644 --- a/crypto/evp/evp_key.c +++ b/crypto/evp/evp_key.c @@ -1,63 +1,14 @@ -/* crypto/evp/evp_key.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. 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.] + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include -#include "cryptlib.h" +#include "internal/cryptlib.h" #include #include #include @@ -67,109 +18,133 @@ static char prompt_string[80]; void EVP_set_pw_prompt(const char *prompt) - { - if (prompt == NULL) - prompt_string[0]='\0'; - else - { - strncpy(prompt_string,prompt,79); - prompt_string[79]='\0'; - } - } +{ + if (prompt == NULL) + prompt_string[0] = '\0'; + else { + strncpy(prompt_string, prompt, 79); + prompt_string[79] = '\0'; + } +} char *EVP_get_pw_prompt(void) - { - if (prompt_string[0] == '\0') - return(NULL); - else - return(prompt_string); - } +{ + 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 */ +/* + * 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) - { - int ret; - char buff[BUFSIZ]; - UI *ui; - - if ((prompt == NULL) && (prompt_string[0] != '\0')) - prompt=prompt_string; - ui = UI_new(); - UI_add_input_string(ui,prompt,0,buf,0,(len>=BUFSIZ)?BUFSIZ-1:len); - if (verify) - UI_add_verify_string(ui,prompt,0, - buff,0,(len>=BUFSIZ)?BUFSIZ-1:len,buf); - ret = UI_process(ui); - UI_free(ui); - OPENSSL_cleanse(buff,BUFSIZ); - return ret; - } +{ + return EVP_read_pw_string_min(buf, 0, len, prompt, verify); +} -int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md, - const unsigned char *salt, const unsigned char *data, size_t 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; +int EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt, + int verify) +{ + int ret = -1; + char buff[BUFSIZ]; + UI *ui; - nkey=type->key_len; - niv=type->iv_len; - OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); - OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); + if ((prompt == NULL) && (prompt_string[0] != '\0')) + prompt = prompt_string; + ui = UI_new(); + if (ui == NULL) + return ret; + if (UI_add_input_string(ui, prompt, 0, buf, min, + (len >= BUFSIZ) ? BUFSIZ - 1 : len) < 0 + || (verify + && UI_add_verify_string(ui, prompt, 0, buff, min, + (len >= BUFSIZ) ? BUFSIZ - 1 : len, + buf) < 0)) + goto end; + ret = UI_process(ui); + OPENSSL_cleanse(buff, BUFSIZ); + end: + UI_free(ui); + return ret; +} - if (data == NULL) return(nkey); +int EVP_BytesToKey(const EVP_CIPHER *type, const 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; + int rv = 0; + nkey = EVP_CIPHER_key_length(type); + niv = EVP_CIPHER_iv_length(type); + OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); + OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); - EVP_MD_CTX_init(&c); - for (;;) - { - if (!EVP_DigestInit_ex(&c,md, NULL)) - return 0; - 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_ex(&c,&(md_buf[0]),&mds); + if (data == NULL) + return (nkey); - for (i=1; i<(unsigned int)count; i++) - { - EVP_DigestInit_ex(&c,md, NULL); - EVP_DigestUpdate(&c,&(md_buf[0]),mds); - EVP_DigestFinal_ex(&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; - } - EVP_MD_CTX_cleanup(&c); - OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE); - return(type->key_len); - } + c = EVP_MD_CTX_new(); + if (c == NULL) + goto err; + for (;;) { + if (!EVP_DigestInit_ex(c, md, NULL)) + goto err; + if (addmd++) + if (!EVP_DigestUpdate(c, &(md_buf[0]), mds)) + goto err; + if (!EVP_DigestUpdate(c, data, datal)) + goto err; + if (salt != NULL) + if (!EVP_DigestUpdate(c, salt, PKCS5_SALT_LEN)) + goto err; + if (!EVP_DigestFinal_ex(c, &(md_buf[0]), &mds)) + goto err; + for (i = 1; i < (unsigned int)count; i++) { + if (!EVP_DigestInit_ex(c, md, NULL)) + goto err; + if (!EVP_DigestUpdate(c, &(md_buf[0]), mds)) + goto err; + if (!EVP_DigestFinal_ex(c, &(md_buf[0]), &mds)) + goto err; + } + 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; + } + rv = EVP_CIPHER_key_length(type); + err: + EVP_MD_CTX_free(c); + OPENSSL_cleanse(md_buf, sizeof(md_buf)); + return rv; +}