Initial source commit

minorGems/crypto/hashes/sha1sum.cpp

@@ -0,0 +1,105 @@
+/*
+ * Modification History
+ *
+ * 2004-May-20   Jason Rohrer
+ * Created.
+ */
+
+
+
+#include "sha1.h"
+#include "minorGems/formats/encodingUtils.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+/**
+ * Prints usage message and exits.
+ *
+ * @param inAppName the name of the app.
+ */
+void usage( char *inAppName );
+
+
+
+int main( int inNumArgs, char **inArgs ) {
+
+
+    if( inNumArgs != 2 ) {
+        usage( inArgs[0] );
+        }
+
+
+    FILE *file = fopen( inArgs[1], "rb" );
+
+    if( file == NULL ) {
+        printf( "Failed to open file %s for reading\n\n", inArgs[1] );
+
+        usage( inArgs[0] );
+        }
+
+    
+    SHA_CTX shaContext;
+
+    SHA1_Init( &shaContext );
+
+               
+    int bufferSize = 5000;
+    unsigned char *buffer = new unsigned char[ bufferSize ];
+
+    int numRead = bufferSize;
+
+    char error = false;
+    
+    // read bytes from file until we run out
+    while( numRead == bufferSize && !error ) {
+
+        numRead = fread( buffer, 1, bufferSize, file );
+
+        if( numRead > 0 ) {
+            SHA1_Update( &shaContext, buffer, numRead );
+            }
+        else{
+            error = true;
+            }
+        }
+
+    fclose( file ); 
+    delete [] buffer;
+
+
+    if( error ) {
+        printf( "Error reading from file %s\n", inArgs[1] );
+        }
+    else {
+        unsigned char *rawDigest = new unsigned char[ SHA1_DIGEST_LENGTH ];
+        
+        SHA1_Final( rawDigest, &shaContext );
+        
+        // else hash is correct
+        char *digestHexString = hexEncode( rawDigest, SHA1_DIGEST_LENGTH );
+        
+        printf( "%s  %s\n", digestHexString, inArgs[1] );
+
+        delete [] rawDigest;
+        delete [] digestHexString;
+        }
+    
+    return 0;
+    }
+
+
+
+void usage( char *inAppName ) {
+
+    printf( "Usage:\n\n" );
+    printf( "\t%s file_to_sum\n", inAppName );
+
+    printf( "example:\n" );
+
+    printf( "\t%s test.txt\n", inAppName );
+
+    exit( 1 );
+    }