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Diffstat (limited to 'demos/maurice/example2.c')
-rw-r--r-- | demos/maurice/example2.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/demos/maurice/example2.c b/demos/maurice/example2.c new file mode 100644 index 0000000..57bce10 --- /dev/null +++ b/demos/maurice/example2.c @@ -0,0 +1,75 @@ +/* NOCW */ +/* + Please read the README file for condition of use, before + using this software. + + Maurice Gittens <mgittens@gits.nl> January 1997 +*/ + +#include <stdlib.h> +#include <stdio.h> +#include <strings.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> + +#include "loadkeys.h" + +#define PUBFILE "cert.pem" +#define PRIVFILE "privkey.pem" +#define STDIN 0 +#define STDOUT 1 + +int main() +{ + char *ct = "This the clear text"; + char *buf; + char *buf2; + EVP_PKEY *pubKey; + EVP_PKEY *privKey; + int len; + + ERR_load_crypto_strings(); + + privKey = ReadPrivateKey(PRIVFILE); + if (!privKey) + { + ERR_print_errors_fp (stderr); + exit (1); + } + + pubKey = ReadPublicKey(PUBFILE); + if(!pubKey) + { + EVP_PKEY_free(privKey); + fprintf(stderr,"Error: can't load public key"); + exit(1); + } + + /* No error checking */ + buf = malloc(EVP_PKEY_size(pubKey)); + buf2 = malloc(EVP_PKEY_size(pubKey)); + + len = RSA_public_encrypt(strlen(ct)+1, ct, buf, pubKey->pkey.rsa,RSA_PKCS1_PADDING); + + if (len != EVP_PKEY_size(pubKey)) + { + fprintf(stderr,"Error: ciphertext should match length of key\n"); + exit(1); + } + + RSA_private_decrypt(len, buf, buf2, privKey->pkey.rsa,RSA_PKCS1_PADDING); + + printf("%s\n", buf2); + + EVP_PKEY_free(privKey); + EVP_PKEY_free(pubKey); + free(buf); + free(buf2); + return 0; +} |