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d02b48c6 | 1 | /* crypto/asn1/a_sign.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 <time.h> | |
61 | #include <sys/types.h> | |
62 | #include <sys/stat.h> | |
63 | ||
64 | #include "cryptlib.h" | |
65 | #include "bn.h" | |
66 | #include "evp.h" | |
67 | #include "x509.h" | |
68 | #include "objects.h" | |
69 | #include "buffer.h" | |
70 | #include "pem.h" | |
71 | ||
72 | int ASN1_sign(i2d,algor1,algor2,signature,data,pkey,type) | |
73 | int (*i2d)(); | |
74 | X509_ALGOR *algor1; | |
75 | X509_ALGOR *algor2; | |
76 | ASN1_BIT_STRING *signature; | |
77 | char *data; | |
78 | EVP_PKEY *pkey; | |
79 | EVP_MD *type; | |
80 | { | |
81 | EVP_MD_CTX ctx; | |
82 | unsigned char *p,*buf_in=NULL,*buf_out=NULL; | |
83 | int i,inl=0,outl=0,outll=0; | |
84 | X509_ALGOR *a; | |
85 | ||
86 | for (i=0; i<2; i++) | |
87 | { | |
88 | if (i == 0) | |
89 | a=algor1; | |
90 | else | |
91 | a=algor2; | |
92 | if (a == NULL) continue; | |
93 | if ( (a->parameter == NULL) || | |
94 | (a->parameter->type != V_ASN1_NULL)) | |
95 | { | |
96 | ASN1_TYPE_free(a->parameter); | |
97 | if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; | |
98 | a->parameter->type=V_ASN1_NULL; | |
99 | } | |
100 | ASN1_OBJECT_free(a->algorithm); | |
101 | a->algorithm=OBJ_nid2obj(type->pkey_type); | |
102 | if (a->algorithm == NULL) | |
103 | { | |
104 | ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE); | |
105 | goto err; | |
106 | } | |
107 | if (a->algorithm->length == 0) | |
108 | { | |
109 | ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); | |
110 | goto err; | |
111 | } | |
112 | } | |
113 | inl=i2d(data,NULL); | |
114 | buf_in=(unsigned char *)Malloc((unsigned int)inl); | |
115 | outll=outl=EVP_PKEY_size(pkey); | |
116 | buf_out=(unsigned char *)Malloc((unsigned int)outl); | |
117 | if ((buf_in == NULL) || (buf_out == NULL)) | |
118 | { | |
119 | outl=0; | |
120 | ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE); | |
121 | goto err; | |
122 | } | |
123 | p=buf_in; | |
124 | ||
125 | i2d(data,&p); | |
126 | EVP_SignInit(&ctx,type); | |
127 | EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); | |
128 | if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, | |
129 | (unsigned int *)&outl,pkey)) | |
130 | { | |
131 | outl=0; | |
132 | ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB); | |
133 | goto err; | |
134 | } | |
135 | if (signature->data != NULL) Free((char *)signature->data); | |
136 | signature->data=buf_out; | |
137 | buf_out=NULL; | |
138 | signature->length=outl; | |
139 | ||
140 | err: | |
141 | memset(&ctx,0,sizeof(ctx)); | |
142 | if (buf_in != NULL) | |
143 | { memset((char *)buf_in,0,(unsigned int)inl); Free((char *)buf_in); } | |
144 | if (buf_out != NULL) | |
145 | { memset((char *)buf_out,0,outll); Free((char *)buf_out); } | |
146 | return(outl); | |
147 | } |