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58964a49 RE |
1 | /* crypto/evp/evp_lib.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" | |
ec577822 BM |
61 | #include <openssl/evp.h> |
62 | #include <openssl/objects.h> | |
58964a49 | 63 | |
6b691a5c | 64 | int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 RE |
65 | { |
66 | int ret; | |
67 | ||
68 | if (c->cipher->set_asn1_parameters != NULL) | |
69 | ret=c->cipher->set_asn1_parameters(c,type); | |
70 | else | |
71 | ret=1; | |
72 | return(ret); | |
73 | } | |
74 | ||
6b691a5c | 75 | int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 RE |
76 | { |
77 | int ret; | |
78 | ||
79 | if (c->cipher->get_asn1_parameters != NULL) | |
80 | ret=c->cipher->get_asn1_parameters(c,type); | |
81 | else | |
82 | ret=1; | |
83 | return(ret); | |
84 | } | |
85 | ||
6b691a5c | 86 | int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 87 | { |
27545970 GT |
88 | int i=0; |
89 | unsigned int l; | |
58964a49 RE |
90 | |
91 | if (type != NULL) | |
92 | { | |
93 | l=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 94 | OPENSSL_assert(l <= sizeof(c->iv)); |
58964a49 | 95 | i=ASN1_TYPE_get_octetstring(type,c->oiv,l); |
27545970 | 96 | if (i != (int)l) |
dfeab068 RE |
97 | return(-1); |
98 | else if (i > 0) | |
99 | memcpy(c->iv,c->oiv,l); | |
58964a49 RE |
100 | } |
101 | return(i); | |
102 | } | |
103 | ||
6b691a5c | 104 | int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) |
58964a49 | 105 | { |
27545970 GT |
106 | int i=0; |
107 | unsigned int j; | |
58964a49 RE |
108 | |
109 | if (type != NULL) | |
110 | { | |
111 | j=EVP_CIPHER_CTX_iv_length(c); | |
27545970 | 112 | OPENSSL_assert(j <= sizeof(c->iv)); |
58964a49 RE |
113 | i=ASN1_TYPE_set_octetstring(type,c->oiv,j); |
114 | } | |
115 | return(i); | |
116 | } | |
884e8ec6 DSH |
117 | |
118 | /* Convert the various cipher NIDs and dummies to a proper OID NID */ | |
84fa704c | 119 | int EVP_CIPHER_type(const EVP_CIPHER *ctx) |
884e8ec6 DSH |
120 | { |
121 | int nid; | |
4b426580 | 122 | ASN1_OBJECT *otmp; |
884e8ec6 DSH |
123 | nid = EVP_CIPHER_nid(ctx); |
124 | ||
125 | switch(nid) { | |
126 | ||
127 | case NID_rc2_cbc: | |
128 | case NID_rc2_64_cbc: | |
129 | case NID_rc2_40_cbc: | |
130 | ||
131 | return NID_rc2_cbc; | |
132 | ||
133 | case NID_rc4: | |
134 | case NID_rc4_40: | |
135 | ||
136 | return NID_rc4; | |
137 | ||
138 | default: | |
4b426580 DSH |
139 | /* Check it has an OID and it is valid */ |
140 | otmp = OBJ_nid2obj(nid); | |
141 | if(!otmp || !otmp->data) nid = NID_undef; | |
142 | ASN1_OBJECT_free(otmp); | |
884e8ec6 DSH |
143 | return nid; |
144 | } | |
145 | } | |
146 |