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Diffstat (limited to 'openssl/demos/sign/sign.c')
| -rw-r--r-- | openssl/demos/sign/sign.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/openssl/demos/sign/sign.c b/openssl/demos/sign/sign.c new file mode 100644 index 0000000..22f53fb --- /dev/null +++ b/openssl/demos/sign/sign.c @@ -0,0 +1,160 @@ +/* demos/sign/sign.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +/* + * sign-it.cpp - Simple test app using SSLeay envelopes to sign data + * 29.9.1996, Sampo Kellomaki <sampo@iki.fi> + */ + +/* converted to C - eay :-) */ + +/* + * reformated a bit and converted to use the more common functions: this was + * initially written at the dawn of time :-) - Steve. + */ + +#include <stdio.h> +#include <openssl/rsa.h> +#include <openssl/evp.h> +#include <openssl/objects.h> +#include <openssl/x509.h> +#include <openssl/err.h> +#include <openssl/pem.h> +#include <openssl/ssl.h> + +int main() +{ + int err; + int sig_len; + unsigned char sig_buf[4096]; + static char certfile[] = "cert.pem"; + static char keyfile[] = "key.pem"; + static char data[] = "I owe you..."; + EVP_MD_CTX md_ctx; + EVP_PKEY *pkey; + FILE *fp; + X509 *x509; + + /* + * Just load the crypto library error strings, SSL_load_error_strings() + * loads the crypto AND the SSL ones + */ + /* SSL_load_error_strings(); */ + ERR_load_crypto_strings(); + + /* Read private key */ + + fp = fopen(keyfile, "r"); + if (fp == NULL) + exit(1); + pkey = PEM_read_PrivateKey(fp, NULL, NULL, NULL); + fclose(fp); + + if (pkey == NULL) { + ERR_print_errors_fp(stderr); + exit(1); + } + + /* Do the signature */ + + EVP_SignInit(&md_ctx, EVP_sha1()); + EVP_SignUpdate(&md_ctx, data, strlen(data)); + sig_len = sizeof(sig_buf); + err = EVP_SignFinal(&md_ctx, sig_buf, &sig_len, pkey); + + if (err != 1) { + ERR_print_errors_fp(stderr); + exit(1); + } + + EVP_PKEY_free(pkey); + + /* Read public key */ + + fp = fopen(certfile, "r"); + if (fp == NULL) + exit(1); + x509 = PEM_read_X509(fp, NULL, NULL, NULL); + fclose(fp); + + if (x509 == NULL) { + ERR_print_errors_fp(stderr); + exit(1); + } + + /* Get public key - eay */ + pkey = X509_get_pubkey(x509); + if (pkey == NULL) { + ERR_print_errors_fp(stderr); + exit(1); + } + + /* Verify the signature */ + + EVP_VerifyInit(&md_ctx, EVP_sha1()); + EVP_VerifyUpdate(&md_ctx, data, strlen((char *)data)); + err = EVP_VerifyFinal(&md_ctx, sig_buf, sig_len, pkey); + EVP_PKEY_free(pkey); + + if (err != 1) { + ERR_print_errors_fp(stderr); + exit(1); + } + printf("Signature Verified Ok.\n"); + return (0); +} |