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@@ -13,6 +13,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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+#include <string.h>
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#define die(s) do { fprintf(stderr, "%s\n", s); goto err; } while (0)
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@@ -26,11 +27,24 @@ main(int argc, char **argv)
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unsigned char digest[20];
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int status = 1;
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- if (argc != 2)
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- die("I want a filename");
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- if (!(b = BIO_new_file(argv[1], "r")))
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- die("couldn't open file");
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-
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+ if (argc < 2) {
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+ fprintf(stderr, "Reading key from stdin...\n");
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+ if (!(b = BIO_new_fp(stdin, BIO_NOCLOSE)))
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+ die("couldn't read from stdin");
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+ } else if (argc == 2) {
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+ if (strcmp(argv[1], "-h") == 0 ||
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+ strcmp(argv[1], "--help") == 0) {
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+ fprintf(stdout, "Usage: %s [keyfile]\n", argv[0]);
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+ status = 0;
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+ goto err;
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+ } else {
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+ if (!(b = BIO_new_file(argv[1], "r")))
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+ die("couldn't open file");
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+ }
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+ } else {
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+ fprintf(stderr, "Usage: %s [keyfile]\n", argv[0]);
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+ goto err;
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+ }
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if (!(key = PEM_read_bio_RSAPrivateKey(b, NULL, NULL, NULL)))
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die("couldn't parse key");
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