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160 lines
5.3 KiB
160 lines
5.3 KiB
/* demos/sign/sign.c */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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/* |
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* sign-it.cpp - Simple test app using SSLeay envelopes to sign data |
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* 29.9.1996, Sampo Kellomaki <sampo@iki.fi> |
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*/ |
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/* converted to C - eay :-) */ |
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/* |
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* reformated a bit and converted to use the more common functions: this was |
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* initially written at the dawn of time :-) - Steve. |
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*/ |
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#include <stdio.h> |
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#include <openssl/rsa.h> |
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#include <openssl/evp.h> |
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#include <openssl/objects.h> |
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#include <openssl/x509.h> |
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#include <openssl/err.h> |
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#include <openssl/pem.h> |
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#include <openssl/ssl.h> |
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int main() |
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{ |
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int err; |
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int sig_len; |
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unsigned char sig_buf[4096]; |
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static char certfile[] = "cert.pem"; |
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static char keyfile[] = "key.pem"; |
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static char data[] = "I owe you..."; |
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EVP_MD_CTX md_ctx; |
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EVP_PKEY *pkey; |
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FILE *fp; |
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X509 *x509; |
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/* |
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* Just load the crypto library error strings, SSL_load_error_strings() |
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* loads the crypto AND the SSL ones |
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*/ |
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/* SSL_load_error_strings(); */ |
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ERR_load_crypto_strings(); |
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/* Read private key */ |
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fp = fopen(keyfile, "r"); |
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if (fp == NULL) |
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exit(1); |
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pkey = PEM_read_PrivateKey(fp, NULL, NULL, NULL); |
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fclose(fp); |
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if (pkey == NULL) { |
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ERR_print_errors_fp(stderr); |
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exit(1); |
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} |
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/* Do the signature */ |
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EVP_SignInit(&md_ctx, EVP_sha1()); |
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EVP_SignUpdate(&md_ctx, data, strlen(data)); |
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sig_len = sizeof(sig_buf); |
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err = EVP_SignFinal(&md_ctx, sig_buf, &sig_len, pkey); |
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if (err != 1) { |
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ERR_print_errors_fp(stderr); |
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exit(1); |
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} |
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EVP_PKEY_free(pkey); |
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/* Read public key */ |
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fp = fopen(certfile, "r"); |
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if (fp == NULL) |
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exit(1); |
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x509 = PEM_read_X509(fp, NULL, NULL, NULL); |
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fclose(fp); |
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if (x509 == NULL) { |
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ERR_print_errors_fp(stderr); |
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exit(1); |
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} |
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/* Get public key - eay */ |
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pkey = X509_get_pubkey(x509); |
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if (pkey == NULL) { |
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ERR_print_errors_fp(stderr); |
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exit(1); |
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} |
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/* Verify the signature */ |
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EVP_VerifyInit(&md_ctx, EVP_sha1()); |
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EVP_VerifyUpdate(&md_ctx, data, strlen((char *)data)); |
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err = EVP_VerifyFinal(&md_ctx, sig_buf, sig_len, pkey); |
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EVP_PKEY_free(pkey); |
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if (err != 1) { |
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ERR_print_errors_fp(stderr); |
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exit(1); |
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} |
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printf("Signature Verified Ok.\n"); |
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return (0); |
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}
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