Import of old SSLeay release: SSLeay 0.8.1b

demos/maurice/example1.c

@@ -0,0 +1,200 @@
+/* NOCW */
+/*
+	Please read the README file for condition of use, before
+	using this software.
+	
+	Maurice Gittens  <mgittens@gits.nl>   January 1997
+*/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+#include <strings.h>
+#include <stdlib.h>
+
+#include "rsa.h"
+#include "evp.h"
+#include "objects.h"
+#include "x509.h"
+#include "err.h"
+#include "pem.h"
+#include "ssl.h"
+
+#include "loadkeys.h"
+
+#define PUBFILE   "cert.pem"
+#define PRIVFILE  "privkey.pem"
+
+#define STDIN     0
+#define STDOUT    1 
+
+void main_encrypt(void);
+void main_decrypt(void);
+
+static const char *usage = "Usage: example1 [-d]\n";
+
+int main(int argc, char *argv[])
+{
+
+        ERR_load_crypto_strings();
+
+	if ((argc == 1))	
+	{
+		main_encrypt();
+	}	
+	else if ((argc == 2) && !strcmp(argv[1],"-d"))
+	{
+		main_decrypt();
+	}
+	else
+	{
+		printf("%s",usage);
+		exit(1);
+	}
+
+	return 0;		
+}
+
+void main_encrypt(void)
+{
+	unsigned int ebuflen;
+        EVP_CIPHER_CTX ectx;
+        unsigned char iv[EVP_MAX_IV_LENGTH];
+	unsigned char *ekey[1]; 
+	int readlen;
+	int ekeylen, net_ekeylen; 
+	EVP_PKEY *pubKey[1];
+	char buf[512];
+	char ebuf[512];
+	
+ 	memset(iv, '\0', sizeof(iv));
+
+        pubKey[0] = ReadPublicKey(PUBFILE);
+
+	if(!pubKey)
+	{
+           fprintf(stderr,"Error: can't load public key");
+           exit(1);
+        }      
+
+        ekey[0] = malloc(EVP_PKEY_size(pubKey[0]));  
+        if (!ekey[0])
+	{
+	   EVP_PKEY_free(pubKey[0]); 
+	   perror("malloc");
+	   exit(1);
+	}
+
+	EVP_SealInit(&ectx,
+                   EVP_des_ede3_cbc(),
+		   ekey,
+		   &ekeylen,
+		   iv,
+		   pubKey,
+		   1); 
+
+	net_ekeylen = htonl(ekeylen);	
+	write(STDOUT, (char*)&net_ekeylen, sizeof(net_ekeylen));
+        write(STDOUT, ekey[0], ekeylen);
+        write(STDOUT, iv, sizeof(iv));
+
+	while(1)
+	{
+		readlen = read(STDIN, buf, sizeof(buf));
+
+		if (readlen <= 0)
+		{
+		   if (readlen < 0)
+			perror("read");
+
+		   break;
+		}
+
+		EVP_SealUpdate(&ectx, ebuf, &ebuflen, buf, readlen);
+
+		write(STDOUT, ebuf, ebuflen);
+	}
+
+        EVP_SealFinal(&ectx, ebuf, &ebuflen);
+        
+	write(STDOUT, ebuf, ebuflen);
+
+        EVP_PKEY_free(pubKey[0]);
+	free(ekey[0]);
+}
+
+void main_decrypt(void)
+{
+	char buf[512];
+	char ebuf[512];
+	unsigned int buflen;
+        EVP_CIPHER_CTX ectx;
+        unsigned char iv[8];
+	unsigned char *encryptKey; 
+	unsigned int ekeylen; 
+	EVP_PKEY *privateKey;
+
+	memset(iv, '\0', sizeof(iv));
+
+	privateKey = ReadPrivateKey(PRIVFILE);
+	if (!privateKey)
+	{
+		fprintf(stderr, "Error: can't load private key");
+		exit(1);	
+	}
+
+     	read(STDIN, &ekeylen, sizeof(ekeylen));
+	ekeylen = ntohl(ekeylen);
+
+	if (ekeylen != EVP_PKEY_size(privateKey))
+	{
+        	EVP_PKEY_free(privateKey);
+		fprintf(stderr, "keylength mismatch");
+		exit(1);	
+	}
+
+	encryptKey = malloc(sizeof(char) * ekeylen);
+	if (!encryptKey)
+	{
+        	EVP_PKEY_free(privateKey);
+		perror("malloc");
+		exit(1);
+	}
+
+	read(STDIN, encryptKey, ekeylen);
+	read(STDIN, iv, sizeof(iv));
+
+	EVP_OpenInit(&ectx,
+		   EVP_des_ede3_cbc(), 
+		   encryptKey,
+		   ekeylen,
+		   iv,
+		   privateKey); 	
+
+	while(1)
+	{
+		int readlen = read(STDIN, ebuf, sizeof(ebuf));
+
+		if (readlen <= 0)
+		{
+			if (readlen < 0)
+				perror("read");
+
+			break;
+		}
+
+		EVP_OpenUpdate(&ectx, buf, &buflen, ebuf, readlen);
+
+		write(STDOUT, buf, buflen);
+	}
+
+        EVP_OpenFinal(&ectx, buf, &buflen);
+
+	write(STDOUT, buf, buflen);
+
+        EVP_PKEY_free(privateKey);
+	free(encryptKey);
+}
+
+