Branch data Line data Source code
1 : : /* crypto/evp/evp_key.c */
2 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : : * All rights reserved.
4 : : *
5 : : * This package is an SSL implementation written
6 : : * by Eric Young (eay@cryptsoft.com).
7 : : * The implementation was written so as to conform with Netscapes SSL.
8 : : *
9 : : * This library is free for commercial and non-commercial use as long as
10 : : * the following conditions are aheared to. The following conditions
11 : : * apply to all code found in this distribution, be it the RC4, RSA,
12 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : : * included with this distribution is covered by the same copyright terms
14 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : : *
16 : : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : : * the code are not to be removed.
18 : : * If this package is used in a product, Eric Young should be given attribution
19 : : * as the author of the parts of the library used.
20 : : * This can be in the form of a textual message at program startup or
21 : : * in documentation (online or textual) provided with the package.
22 : : *
23 : : * Redistribution and use in source and binary forms, with or without
24 : : * modification, are permitted provided that the following conditions
25 : : * are met:
26 : : * 1. Redistributions of source code must retain the copyright
27 : : * notice, this list of conditions and the following disclaimer.
28 : : * 2. Redistributions in binary form must reproduce the above copyright
29 : : * notice, this list of conditions and the following disclaimer in the
30 : : * documentation and/or other materials provided with the distribution.
31 : : * 3. All advertising materials mentioning features or use of this software
32 : : * must display the following acknowledgement:
33 : : * "This product includes cryptographic software written by
34 : : * Eric Young (eay@cryptsoft.com)"
35 : : * The word 'cryptographic' can be left out if the rouines from the library
36 : : * being used are not cryptographic related :-).
37 : : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : : * the apps directory (application code) you must include an acknowledgement:
39 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : : *
41 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : : * SUCH DAMAGE.
52 : : *
53 : : * The licence and distribution terms for any publically available version or
54 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : : * copied and put under another distribution licence
56 : : * [including the GNU Public Licence.]
57 : : */
58 : :
59 : : #include <stdio.h>
60 : : #include "cryptlib.h"
61 : : #include <openssl/x509.h>
62 : : #include <openssl/objects.h>
63 : : #include <openssl/evp.h>
64 : : #include <openssl/ui.h>
65 : :
66 : : /* should be init to zeros. */
67 : : static char prompt_string[80];
68 : :
69 : 0 : void EVP_set_pw_prompt(const char *prompt)
70 : : {
71 [ # # ]: 0 : if (prompt == NULL)
72 : 0 : prompt_string[0]='\0';
73 : : else
74 : : {
75 : : strncpy(prompt_string,prompt,79);
76 : 0 : prompt_string[79]='\0';
77 : : }
78 : 0 : }
79 : :
80 : 0 : char *EVP_get_pw_prompt(void)
81 : : {
82 [ # # ]: 0 : if (prompt_string[0] == '\0')
83 : : return(NULL);
84 : : else
85 : 0 : return(prompt_string);
86 : : }
87 : :
88 : : /* For historical reasons, the standard function for reading passwords is
89 : : * in the DES library -- if someone ever wants to disable DES,
90 : : * this function will fail */
91 : 0 : int EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
92 : : {
93 : 0 : return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
94 : : }
95 : :
96 : 0 : int EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt, int verify)
97 : : {
98 : : int ret;
99 : : char buff[BUFSIZ];
100 : : UI *ui;
101 : :
102 [ # # ][ # # ]: 0 : if ((prompt == NULL) && (prompt_string[0] != '\0'))
103 : 0 : prompt=prompt_string;
104 : 0 : ui = UI_new();
105 : 0 : UI_add_input_string(ui,prompt,0,buf,min,(len>=BUFSIZ)?BUFSIZ-1:len);
106 [ # # ]: 0 : if (verify)
107 : 0 : UI_add_verify_string(ui,prompt,0,
108 : : buff,min,(len>=BUFSIZ)?BUFSIZ-1:len,buf);
109 : 0 : ret = UI_process(ui);
110 : 0 : UI_free(ui);
111 : 0 : OPENSSL_cleanse(buff,BUFSIZ);
112 : 0 : return ret;
113 : : }
114 : :
115 : 228 : int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
116 : : const unsigned char *salt, const unsigned char *data, int datal,
117 : : int count, unsigned char *key, unsigned char *iv)
118 : : {
119 : : EVP_MD_CTX c;
120 : : unsigned char md_buf[EVP_MAX_MD_SIZE];
121 : 228 : int niv,nkey,addmd=0;
122 : 228 : unsigned int mds=0,i;
123 : 228 : int rv = 0;
124 : 228 : nkey=type->key_len;
125 : 228 : niv=type->iv_len;
126 [ - + ]: 228 : OPENSSL_assert(nkey <= EVP_MAX_KEY_LENGTH);
127 [ - + ]: 228 : OPENSSL_assert(niv <= EVP_MAX_IV_LENGTH);
128 : :
129 [ + - ]: 228 : if (data == NULL) return(nkey);
130 : :
131 : 228 : EVP_MD_CTX_init(&c);
132 : : for (;;)
133 : : {
134 [ + - ]: 404 : if (!EVP_DigestInit_ex(&c,md, NULL))
135 : : return 0;
136 [ + + ]: 404 : if (addmd++)
137 [ + - ]: 176 : if (!EVP_DigestUpdate(&c,&(md_buf[0]),mds))
138 : : goto err;
139 [ + - ]: 404 : if (!EVP_DigestUpdate(&c,data,datal))
140 : : goto err;
141 [ + - ]: 404 : if (salt != NULL)
142 [ + - ]: 404 : if (!EVP_DigestUpdate(&c,salt,PKCS5_SALT_LEN))
143 : : goto err;
144 [ + - ]: 404 : if (!EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds))
145 : : goto err;
146 : :
147 [ - + ]: 404 : for (i=1; i<(unsigned int)count; i++)
148 : : {
149 [ # # ]: 0 : if (!EVP_DigestInit_ex(&c,md, NULL))
150 : : goto err;
151 [ # # ]: 0 : if (!EVP_DigestUpdate(&c,&(md_buf[0]),mds))
152 : : goto err;
153 [ # # ]: 0 : if (!EVP_DigestFinal_ex(&c,&(md_buf[0]),&mds))
154 : : goto err;
155 : : }
156 : 404 : i=0;
157 [ + + ]: 404 : if (nkey)
158 : : {
159 : : for (;;)
160 : : {
161 [ + + ]: 4228 : if (nkey == 0) break;
162 [ + + ]: 4000 : if (i == mds) break;
163 [ + - ]: 3944 : if (key != NULL)
164 : 3944 : *(key++)=md_buf[i];
165 : 3944 : nkey--;
166 : 3944 : i++;
167 : 3944 : }
168 : : }
169 [ + + ][ + + ]: 404 : if (niv && (i != mds))
170 : : {
171 : : for (;;)
172 : : {
173 [ + + ]: 1804 : if (niv == 0) break;
174 [ + + ]: 1640 : if (i == mds) break;
175 [ + - ]: 1632 : if (iv != NULL)
176 : 1632 : *(iv++)=md_buf[i];
177 : 1632 : niv--;
178 : 1632 : i++;
179 : 1632 : }
180 : : }
181 [ + + ]: 404 : if ((nkey == 0) && (niv == 0)) break;
182 : : }
183 : 228 : rv = type->key_len;
184 : : err:
185 : 228 : EVP_MD_CTX_cleanup(&c);
186 : 228 : OPENSSL_cleanse(&(md_buf[0]),EVP_MAX_MD_SIZE);
187 : 228 : return rv;
188 : : }
189 : :
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