check in keyconvert tool

[sfa.git] / keyconvert / keyconvertmain.c

diff --git a/keyconvert/keyconvertmain.c b/keyconvert/keyconvertmain.c
new file mode 100644 (file)
index 0000000..d59dba8
--- /dev/null
+++ b/keyconvert/keyconvertmain.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include "keyconvert.h"
+#include "b64decode.h"
+
+int main(int argc, char **argv)
+{
+    FILE *fin, *fout;
+    char inbytes[16384], *inptr;
+    char decodedKey[16384];
+    int len;
+
+    b64decodeinit();
+
+    if (argc != 3) {
+        fprintf(stderr, "syntax: keyconvert <infile> <outfile>\n");
+        exit(1);
+    }
+
+    fin = fopen(argv[1], "rt");
+    if (fin == NULL) {
+        fprintf(stderr, "failed to open %s\n", argv[1]);
+        exit(1);
+    }
+
+    memset(inbytes, 0, sizeof(inbytes));
+    len = fread(inbytes, 1, sizeof(inbytes), fin);
+    fclose(fin);
+
+ //   fprintf(stdout, "read %d bytes from openssh file\n", len);
+
+    inptr = inbytes;
+
+    // skip leading space
+    while (isspace(*inptr)) inptr++;
+
+    // skip the ssh-rsa or ssh-dsa part
+    while (*inptr && !isspace(*inptr)) inptr++;
+
+    // skip spaces between ssh-rsa/ssh-dsa and key
+    while (isspace(*inptr)) inptr++;
+
+    // if there is any part after the key, terminate it
+    if (strchr(inptr, ' ') != NULL) {
+        *strchr(inptr, ' ') = '\0';
+    }
+
+    // at this point, inptr contains the b64 encoded openssh key
+
+    len = b64decode(inptr, decodedKey);
+
+//    fprintf(stdout, "decoded openssh file length is %d\n", len);
+
+    fout = fopen(argv[2], "wt");
+    if (fout == NULL) {
+        fprintf(stderr, "failed to open output file %s\n", argv[2]);
+        exit(1);
+    }
+
+    openssh_binary_to_openssl(decodedKey, len, fout);
+
+    fclose(fout);
+
+    fprintf(stdout, "completed\n");
+    return 0;
+}