Tests and documentaiton regarding #35.

2 files changed, 14 insertions, 0 deletions

diff --git a/README.md b/README.md
index cdc37ce..04b044f 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ Sane constants have been created for N, r and p so you can create a hash like th
 
     libscrypt_hash(outbuf, "My cats's breath smells like cat food", SCRYPT_N, SCRYPT_r, SCRYPT_p);
 
+This function sets errno as required for any error conditions.
+
 Output stored in "outbuf" is stored in a standardised MCF form, which means includes the randomly created, 128 bit salt, all N, r and p values, and a BASE64 encoded version of the hash. The entire MCF can be stored in a database, and compared for use as below:
 
     retval = libscrypt_check(mcf, "pleasefailme");
diff --git a/main.c b/main.c
index cf60c05..ab5acec 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#include <errno.h>
 
 #include "b64.h"
 #include "crypto_scrypt-hexconvert.h"
@@ -43,6 +44,17 @@ int main()
 
 	printf("TEST ONE: SUCCESSFUL\n");
 
+	printf("TEST ONE and a half: Review errno on invalid input\n");
+
+	retval = libscrypt_scrypt((uint8_t*)"password",strlen("password"), (uint8_t*)"NaCl", strlen("NaCl"), 47, 1, 1, hashbuf, sizeof(hashbuf));
+
+	if(retval != -1)
+	{
+		printf("TEST ONE FAILED: Failed to detect invalid input\n");
+		exit(EXIT_FAILURE);
+	}
+	printf("TEST ONE and a half: Successfully failed on error: %s\n", strerror(errno));
+
 	/* Convert the binary string to hex representation. Outbuf must be
 	* at least sizeof(hashbuf) * 2 + 1
 	* Returns 0 on fail, 1 on success