--- /dev/null
+/* 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)
+ {
+ return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
+ }
+
+int EVP_read_pw_string_min(char *buf, int min, 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,min,(len>=BUFSIZ)?BUFSIZ-1:len);
+ if (verify)
+ UI_add_verify_string(ui,prompt,0,
+ buff,min,(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;
+ int rv = 0;
+ 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++)
+ 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 = type->key_len;
+ err:
+ EVP_MD_CTX_cleanup(&c);
+ OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE);
+ return rv;
+ }
+
projects / cassiopeia.git / blobdiff