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From Mats Erik Andersson <debian@gisladisker.se>: Implement importing of

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RSA keys from PEM files.
This commit is contained in:
tteras 2011-02-10 11:20:08 +00:00
parent 8c49816297
commit 1f21513187
1 changed files with 124 additions and 25 deletions
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145
crypto/dist/ipsec-tools/src/racoon/plainrsa-gen.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: plainrsa-gen.c,v 1.4 2006/09/09 16:22:10 manu Exp $ */
/* $NetBSD: plainrsa-gen.c,v 1.5 2011/02/10 11:20:08 tteras Exp $ */
/* Id: plainrsa-gen.c,v 1.6 2005/04/21 09:08:40 monas Exp */
/*
@ -43,11 +43,13 @@
#include <sys/stat.h>
#include <sys/socket.h>
#include <unistd.h>
#include <fcntl.h>
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/evp.h>
#ifdef HAVE_OPENSSL_ENGINE_H
@ -72,6 +74,7 @@ usage (char *argv0)
fprintf(stderr, " -b bits Generate <bits> long RSA key (default=1024)\n");
fprintf(stderr, " -e pubexp Public exponent to use (default=0x3)\n");
fprintf(stderr, " -f filename Filename to store the key to (default=stdout)\n");
fprintf(stderr, " -i filename Input source for format conversion\n");
fprintf(stderr, " -h Help\n");
fprintf(stderr, "\n");
fprintf(stderr, "Report bugs to <ipsec-tools-devel@lists.sourceforge.net>\n");
@ -82,7 +85,7 @@ usage (char *argv0)
* See RFC 2065, section 3.5 for details about the output format.
*/
vchar_t *
mix_b64_pubkey(RSA *key)
mix_b64_pubkey(const RSA *key)
{
char *binbuf;
long binlen, ret;
@ -116,17 +119,10 @@ lowercase(char *input)
}
int
gen_rsa_key(FILE *fp, size_t bits, unsigned long exp)
print_rsa_key(FILE *fp, const RSA *key)
{
RSA *key;
vchar_t *pubkey64 = NULL;
key = RSA_generate_key(bits, exp, NULL, NULL);
if (!key) {
fprintf(stderr, "RSA_generate_key(): %s\n", eay_strerror());
return -1;
}
pubkey64 = mix_b64_pubkey(key);
if (!pubkey64) {
fprintf(stderr, "mix_b64_pubkey(): %s\n", eay_strerror());
@ -135,7 +131,7 @@ gen_rsa_key(FILE *fp, size_t bits, unsigned long exp)
fprintf(fp, "# : PUB 0s%s\n", pubkey64->v);
fprintf(fp, ": RSA\t{\n");
fprintf(fp, "\t# RSA %zu bits\n", bits);
fprintf(fp, "\t# RSA %zu bits\n", BN_num_bits(key->n));
fprintf(fp, "\t# pubkey=0s%s\n", pubkey64->v);
fprintf(fp, "\tModulus: 0x%s\n", lowercase(BN_bn2hex(key->n)));
fprintf(fp, "\tPublicExponent: 0x%s\n", lowercase(BN_bn2hex(key->e)));
@ -148,23 +144,92 @@ gen_rsa_key(FILE *fp, size_t bits, unsigned long exp)
fprintf(fp, " }\n");
vfree(pubkey64);
return 0;
}
int
print_public_rsa_key(FILE *fp, const RSA *key)
{
vchar_t *pubkey64 = NULL;
pubkey64 = mix_b64_pubkey(key);
if (!pubkey64) {
fprintf(stderr, "mix_b64_pubkey(): %s\n", eay_strerror());
return -1;
}
fprintf(fp, ": PUB 0s%s\n", pubkey64->v);
vfree(pubkey64);
return 0;
}
int
convert_rsa_key(FILE *fpout, FILE *fpin)
{
int ret;
RSA *key = NULL;
key = PEM_read_RSAPrivateKey(fpin, NULL, NULL, NULL);
if (key) {
ret = print_rsa_key(fpout, key);
RSA_free(key);
return ret;
}
rewind(fpin);
key = PEM_read_RSA_PUBKEY(fpin, NULL, NULL, NULL);
if (key) {
ret = print_public_rsa_key(fpout, key);
RSA_free(key);
return ret;
}
/* Implement parsing of input stream containing
* private or public "plainrsa" formatted text.
* Convert the result to PEM formatted output.
*
* This seemingly needs manual use of prsaparse().
* An expert ought to do this. */
fprintf(stderr, "convert_rsa_key: %s\n", "Only conversion from PEM at this time");
return -1;
}
int
gen_rsa_key(FILE *fp, size_t bits, unsigned long exp)
{
int ret;
RSA *key;
key = RSA_generate_key(bits, exp, NULL, NULL);
if (!key) {
fprintf(stderr, "RSA_generate_key(): %s\n", eay_strerror());
return -1;
}
ret = print_rsa_key(fp, key);
RSA_free(key);
return ret;
}
int
main (int argc, char *argv[])
{
FILE *fp = stdout;
FILE *fp = stdout, *fpin = NULL;
size_t bits = 1024;
unsigned int pubexp = 0x3;
struct stat st;
extern char *optarg;
extern int optind;
int c;
char *fname = NULL;
int c, fd = -1, fdin = -1;
char *fname = NULL, *finput = NULL;
while ((c = getopt(argc, argv, "e:b:f:h")) != -1)
while ((c = getopt(argc, argv, "e:b:f:i:h")) != -1)
switch (c) {
case 'e':
if (strncmp(optarg, "0x", 2) == 0)
@ -178,31 +243,65 @@ main (int argc, char *argv[])
case 'f':
fname = optarg;
break;
case 'i':
finput = optarg;
break;
case 'h':
default:
usage(argv[0]);
}
if (fname) {
if (stat(fname, &st) >= 0) {
fprintf(stderr, "%s: file exists! Please use a different name.\n", fname);
exit(1);
}
umask(0077);
fp = fopen(fname, "w");
if (fp == NULL) {
/* Restrictive access due to private key material. */
fd = open(fname, O_WRONLY | O_CREAT | O_EXCL | O_NOFOLLOW, S_IRUSR | S_IWUSR);
if (fd < 0) {
if (errno == EEXIST)
fprintf(stderr, "%s: file exists! Please use a different name.\n", fname);
else
fprintf(stderr, "%s: %s\n", fname, strerror(errno));
exit(1);
}
fp = fdopen(fd, "w");
if (fp == NULL) {
fprintf(stderr, "%s: %s\n", fname, strerror(errno));
close(fd);
exit(1);
}
}
if (finput) {
/* Restrictive access once more. Do not be fooled by a link. */
fdin = open(finput, O_RDONLY | O_NOFOLLOW);
if (fdin < 0) {
if (errno == ELOOP)
fprintf(stderr, "%s: file is a link. Discarded for security.\n", fname);
if (fp)
fclose(fp);
exit(1);
}
fpin = fdopen(fdin, "r");
if (fpin == NULL) {
fprintf(stderr, "%s: %s\n", fname, strerror(errno));
close(fdin);
if (fp)
fclose(fp);
exit(1);
}
}
ploginit();
eay_init();
if (fpin)
convert_rsa_key(fp, fpin);
else
gen_rsa_key(fp, bits, pubexp);
fclose(fp);
if (fpin)
fclose(fpin);
return 0;
}