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-rw-r--r--openssl/demos/maurice/example4.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/openssl/demos/maurice/example4.c b/openssl/demos/maurice/example4.c
new file mode 100644
index 000000000..ce629848b
--- /dev/null
+++ b/openssl/demos/maurice/example4.c
@@ -0,0 +1,123 @@
+/* NOCW */
+/*
+ Please read the README file for condition of use, before
+ using this software.
+
+ Maurice Gittens <mgittens@gits.nl> January 1997
+
+*/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <openssl/evp.h>
+
+#define STDIN 0
+#define STDOUT 1
+#define BUFLEN 512
+
+static const char *usage = "Usage: example4 [-d]\n";
+
+void do_encode(void);
+void do_decode(void);
+
+int main(int argc, char *argv[])
+{
+ if ((argc == 1))
+ {
+ do_encode();
+ }
+ else if ((argc == 2) && !strcmp(argv[1],"-d"))
+ {
+ do_decode();
+ }
+ else
+ {
+ fprintf(stderr,"%s", usage);
+ exit(1);
+ }
+
+ return 0;
+}
+
+void do_encode()
+{
+ char buf[BUFLEN];
+ char ebuf[BUFLEN+24];
+ unsigned int ebuflen;
+ EVP_ENCODE_CTX ectx;
+
+ EVP_EncodeInit(&ectx);
+
+ while(1)
+ {
+ int readlen = read(STDIN, buf, sizeof(buf));
+
+ if (readlen <= 0)
+ {
+ if (!readlen)
+ break;
+ else
+ {
+ perror("read");
+ exit(1);
+ }
+ }
+
+ EVP_EncodeUpdate(&ectx, ebuf, &ebuflen, buf, readlen);
+
+ write(STDOUT, ebuf, ebuflen);
+ }
+
+ EVP_EncodeFinal(&ectx, ebuf, &ebuflen);
+
+ write(STDOUT, ebuf, ebuflen);
+}
+
+void do_decode()
+{
+ char buf[BUFLEN];
+ char ebuf[BUFLEN+24];
+ unsigned int ebuflen;
+ EVP_ENCODE_CTX ectx;
+
+ EVP_DecodeInit(&ectx);
+
+ while(1)
+ {
+ int readlen = read(STDIN, buf, sizeof(buf));
+ int rc;
+
+ if (readlen <= 0)
+ {
+ if (!readlen)
+ break;
+ else
+ {
+ perror("read");
+ exit(1);
+ }
+ }
+
+ rc = EVP_DecodeUpdate(&ectx, ebuf, &ebuflen, buf, readlen);
+ if (rc <= 0)
+ {
+ if (!rc)
+ {
+ write(STDOUT, ebuf, ebuflen);
+ break;
+ }
+
+ fprintf(stderr, "Error: decoding message\n");
+ return;
+ }
+
+ write(STDOUT, ebuf, ebuflen);
+ }
+
+ EVP_DecodeFinal(&ectx, ebuf, &ebuflen);
+
+ write(STDOUT, ebuf, ebuflen);
+}
+