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Diffstat (limited to 'openssl/demos/eay/loadrsa.c')
-rw-r--r--openssl/demos/eay/loadrsa.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/openssl/demos/eay/loadrsa.c b/openssl/demos/eay/loadrsa.c
new file mode 100644
index 000000000..79f1885ca
--- /dev/null
+++ b/openssl/demos/eay/loadrsa.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <openssl/rsa.h>
+
+/* This is a simple program to generate an RSA private key. It then
+ * saves both the public and private key into a char array, then
+ * re-reads them. It saves them as DER encoded binary data.
+ */
+
+void callback(stage,count,arg)
+int stage,count;
+char *arg;
+ {
+ FILE *out;
+
+ out=(FILE *)arg;
+ fprintf(out,"%d",stage);
+ if (stage == 3)
+ fprintf(out,"\n");
+ fflush(out);
+ }
+
+main()
+ {
+ RSA *rsa,*pub_rsa,*priv_rsa;
+ int len;
+ unsigned char buf[1024],*p;
+
+ rsa=RSA_generate_key(512,RSA_F4,callback,(char *)stdout);
+
+ p=buf;
+
+ /* Save the public key into buffer, we know it will be big enough
+ * but we should really check how much space we need by calling the
+ * i2d functions with a NULL second parameter */
+ len=i2d_RSAPublicKey(rsa,&p);
+ len+=i2d_RSAPrivateKey(rsa,&p);
+
+ printf("The public and private key are now both in a char array\n");
+ printf("and are taking up %d bytes\n",len);
+
+ RSA_free(rsa);
+
+ p=buf;
+ pub_rsa=d2i_RSAPublicKey(NULL,&p,(long)len);
+ len-=(p-buf);
+ priv_rsa=d2i_RSAPrivateKey(NULL,&p,(long)len);
+
+ if ((pub_rsa == NULL) || (priv_rsa == NULL))
+ ERR_print_errors_fp(stderr);
+
+ RSA_free(pub_rsa);
+ RSA_free(priv_rsa);
+ }