1 files changed, 32 insertions, 31 deletions

diff --git a/src/lib/libcrypto/doc/EVP_DigestInit.pod b/src/lib/libcrypto/doc/EVP_DigestInit.pod
index 2ff01b9c7c..f2c1cfdbf0 100644
--- a/src/lib/libcrypto/doc/EVP_DigestInit.pod
+++ b/src/lib/libcrypto/doc/EVP_DigestInit.pod
@@ -215,39 +215,40 @@ digest name passed on the command line.
  #include <stdio.h>
  #include <openssl/evp.h>
 
+ int
  main(int argc, char *argv[])
  {
- EVP_MD_CTX *mdctx;
- const EVP_MD *md;
- char mess1[] = "Test Message\n";
- char mess2[] = "Hello World\n";
- unsigned char md_value[EVP_MAX_MD_SIZE];
- int md_len, i;
-
- OpenSSL_add_all_digests();
-
- if(!argv[1]) {
-        printf("Usage: mdtest digestname\n");
-        exit(1);
- }
-
- md = EVP_get_digestbyname(argv[1]);
-
- if(!md) {
-        printf("Unknown message digest %s\n", argv[1]);
-        exit(1);
- }
-
- mdctx = EVP_MD_CTX_create();
- EVP_DigestInit_ex(mdctx, md, NULL);
- EVP_DigestUpdate(mdctx, mess1, strlen(mess1));
- EVP_DigestUpdate(mdctx, mess2, strlen(mess2));
- EVP_DigestFinal_ex(mdctx, md_value, &md_len);
- EVP_MD_CTX_destroy(mdctx);
-
- printf("Digest is: ");
- for(i = 0; i < md_len; i++) printf("%02x", md_value[i]);
- printf("\n");
+        EVP_MD_CTX *mdctx;
+        const EVP_MD *md;
+        const char mess1[] = "Test Message\n";
+        const char mess2[] = "Hello World\n";
+        unsigned char md_value[EVP_MAX_MD_SIZE];
+        int md_len, i;
+
+        OpenSSL_add_all_digests();
+
+        if (argc <= 1) {
+                printf("Usage: mdtest digestname\n");
+                exit(1);
+        }
+
+        md = EVP_get_digestbyname(argv[1]);
+        if (md == NULL) {
+                printf("Unknown message digest %s\n", argv[1]);
+                exit(1);
+        }
+
+        mdctx = EVP_MD_CTX_create();
+        EVP_DigestInit_ex(mdctx, md, NULL);
+        EVP_DigestUpdate(mdctx, mess1, strlen(mess1));
+        EVP_DigestUpdate(mdctx, mess2, strlen(mess2));
+        EVP_DigestFinal_ex(mdctx, md_value, &md_len);
+        EVP_MD_CTX_destroy(mdctx);
+
+        printf("Digest is: ");
+        for(i = 0; i < md_len; i++)
+                printf("%02x", md_value[i]);
+        printf("\n");
  }
 
 =head1 SEE ALSO