Make dumpRSAPublicKey also accept a public key in PEM format
This change makes dumpRSAPublicKey directly accept a public key in PEM format. This makes it possible to avoid the unnecessary step of generating a self-signed certificate to dump the public key in .keyb format.
The old style certificate input is still accepted.
Using certs (as done previously):
dumpRSAPublicKey -cert <certfile>
Directly using public keys:
dumpRSAPublicKey -pub <pubfile>
Change-Id: Ic35b59aff6613d145d7947212650da281f734b74
BUG=7576
TEST=manual
$ openssl genrsa -F4 -out test.pem 4096
$ openssl rsa -in test.pem -out test.pub
$ dumpRSAPublicKey -pub test.pub >test.pub.keyb
Verify that this matches the output we get using the old style <cert> input.
$ openssl req -batch -new -x509 -key test.pem -out test.cert
$ dumpRSAPublicKey -cert test.cert >test.cert.keyb
$ diff test.pub.keyb test.cert.keyb
$
Review URL: http://codereview.chromium.org/4215006
diff --git a/utility/dumpRSAPublicKey.c b/utility/dumpRSAPublicKey.c
index 837303c..da8597a 100644
--- a/utility/dumpRSAPublicKey.c
+++ b/utility/dumpRSAPublicKey.c
@@ -136,40 +136,52 @@
}
int main(int argc, char* argv[]) {
+ int cert_mode = 0;
FILE* fp;
X509* cert = NULL;
RSA* pubkey = NULL;
EVP_PKEY* key;
- if (argc != 2) {
- fprintf(stderr, "Usage: %s <certfile>\n", argv[0]);
+ if (argc != 3 || (strcmp(argv[1], "-cert") && strcmp(argv[1], "-pub"))) {
+ fprintf(stderr, "Usage: %s <-cert | -pub> <file>\n", argv[0]);
return -1;
}
- fp = fopen(argv[1], "r");
+ if (!strcmp(argv[1], "-cert"))
+ cert_mode = 1;
+
+ fp = fopen(argv[2], "r");
if (!fp) {
- fprintf(stderr, "Couldn't open certificate file!\n");
+ fprintf(stderr, "Couldn't open file %s!\n", argv[2]);
return -1;
}
- /* Read the certificate */
- if (!PEM_read_X509(fp, &cert, NULL, NULL)) {
- fprintf(stderr, "Couldn't read certificate.\n");
- goto fail;
- }
+ if (cert_mode) {
+ /* Read the certificate */
+ if (!PEM_read_X509(fp, &cert, NULL, NULL)) {
+ fprintf(stderr, "Couldn't read certificate.\n");
+ goto fail;
+ }
- /* Get the public key from the certificate. */
- key = X509_get_pubkey(cert);
+ /* Get the public key from the certificate. */
+ key = X509_get_pubkey(cert);
- /* Convert to a RSA_style key. */
- if (!(pubkey = EVP_PKEY_get1_RSA(key))) {
- fprintf(stderr, "Couldn't convert to a RSA style key.\n");
- goto fail;
+ /* Convert to a RSA_style key. */
+ if (!(pubkey = EVP_PKEY_get1_RSA(key))) {
+ fprintf(stderr, "Couldn't convert to a RSA style key.\n");
+ goto fail;
+ }
+ } else {
+ /* Read the pubkey in .PEM format. */
+ if (!(pubkey = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL))) {
+ fprintf(stderr, "Couldn't read public key file.\n");
+ goto fail;
+ }
}
if (check(pubkey)) {
- output (pubkey);
+ output(pubkey);
}
fail: