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Diffstat (limited to 'openssl/crypto/evp/evp_key.c')
| -rw-r--r-- | openssl/crypto/evp/evp_key.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/openssl/crypto/evp/evp_key.c b/openssl/crypto/evp/evp_key.c new file mode 100644 index 000000000..361ea69ab --- /dev/null +++ b/openssl/crypto/evp/evp_key.c @@ -0,0 +1,175 @@ +/* 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> +#include <openssl/ui.h> + +/* should be init to zeros. */ +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'; + } + } + +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) + { + 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; + } + +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; + + nkey=type->key_len; + niv=type->iv_len; + OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH); + OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH); + + if (data == NULL) return(nkey); + + 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); + + 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); + } + |