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d02b48c6 | 1 | /* demos/sign/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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | ||
0f113f3e | 59 | /* |
b0700d2c | 60 | * sign-it.cpp - Simple test app using EVP envelopes to sign data |
0f113f3e MC |
61 | * 29.9.1996, Sampo Kellomaki <sampo@iki.fi> |
62 | */ | |
d02b48c6 RE |
63 | |
64 | /* converted to C - eay :-) */ | |
65 | ||
0f113f3e MC |
66 | /* |
67 | * reformated a bit and converted to use the more common functions: this was | |
5f6d0ea2 DSH |
68 | * initially written at the dawn of time :-) - Steve. |
69 | */ | |
70 | ||
d02b48c6 | 71 | #include <stdio.h> |
ec577822 BM |
72 | #include <openssl/rsa.h> |
73 | #include <openssl/evp.h> | |
74 | #include <openssl/objects.h> | |
75 | #include <openssl/x509.h> | |
76 | #include <openssl/err.h> | |
77 | #include <openssl/pem.h> | |
78 | #include <openssl/ssl.h> | |
d02b48c6 | 79 | |
0f113f3e | 80 | int main() |
d02b48c6 | 81 | { |
0f113f3e MC |
82 | int err; |
83 | int sig_len; | |
84 | unsigned char sig_buf[4096]; | |
85 | static char certfile[] = "cert.pem"; | |
86 | static char keyfile[] = "key.pem"; | |
87 | static char data[] = "I owe you..."; | |
88 | EVP_MD_CTX md_ctx; | |
89 | EVP_PKEY *pkey; | |
90 | FILE *fp; | |
91 | X509 *x509; | |
92 | ||
93 | /* | |
94 | * Just load the crypto library error strings, SSL_load_error_strings() | |
95 | * loads the crypto AND the SSL ones | |
96 | */ | |
97 | /* SSL_load_error_strings(); */ | |
98 | ERR_load_crypto_strings(); | |
99 | ||
100 | /* Read private key */ | |
101 | ||
102 | fp = fopen(keyfile, "r"); | |
103 | if (fp == NULL) | |
104 | exit(1); | |
105 | pkey = PEM_read_PrivateKey(fp, NULL, NULL, NULL); | |
106 | fclose(fp); | |
107 | ||
108 | if (pkey == NULL) { | |
109 | ERR_print_errors_fp(stderr); | |
110 | exit(1); | |
111 | } | |
112 | ||
113 | /* Do the signature */ | |
114 | ||
115 | EVP_SignInit(&md_ctx, EVP_sha1()); | |
116 | EVP_SignUpdate(&md_ctx, data, strlen(data)); | |
117 | sig_len = sizeof(sig_buf); | |
118 | err = EVP_SignFinal(&md_ctx, sig_buf, &sig_len, pkey); | |
119 | ||
120 | if (err != 1) { | |
121 | ERR_print_errors_fp(stderr); | |
122 | exit(1); | |
123 | } | |
124 | ||
125 | EVP_PKEY_free(pkey); | |
126 | ||
127 | /* Read public key */ | |
128 | ||
129 | fp = fopen(certfile, "r"); | |
130 | if (fp == NULL) | |
131 | exit(1); | |
132 | x509 = PEM_read_X509(fp, NULL, NULL, NULL); | |
133 | fclose(fp); | |
134 | ||
135 | if (x509 == NULL) { | |
136 | ERR_print_errors_fp(stderr); | |
137 | exit(1); | |
138 | } | |
139 | ||
140 | /* Get public key - eay */ | |
141 | pkey = X509_get_pubkey(x509); | |
142 | if (pkey == NULL) { | |
143 | ERR_print_errors_fp(stderr); | |
144 | exit(1); | |
145 | } | |
146 | ||
147 | /* Verify the signature */ | |
148 | ||
149 | EVP_VerifyInit(&md_ctx, EVP_sha1()); | |
150 | EVP_VerifyUpdate(&md_ctx, data, strlen((char *)data)); | |
151 | err = EVP_VerifyFinal(&md_ctx, sig_buf, sig_len, pkey); | |
152 | EVP_PKEY_free(pkey); | |
153 | ||
154 | if (err != 1) { | |
155 | ERR_print_errors_fp(stderr); | |
156 | exit(1); | |
157 | } | |
158 | printf("Signature Verified Ok.\n"); | |
159 | return (0); | |
d02b48c6 | 160 | } |