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Allow RSA key-generation to specify an arbitrary public exponent. Jelte

Browse source 
proposed the change and submitted the patch, I jiggled it slightly and
adjusted the other parts of openssl that were affected.

PR: 867
Submitted by: Jelte Jansen
Reviewed by: Geoff Thorpe
This commit is contained in:
Geoff Thorpe 2004-04-26 15:31:35 +00:00
parent f3f52d7f45
commit bcfea9fb25
8 changed files with 58 additions and 35 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
CHANGES
View file

@ -4,6 +4,11 @@
Changes between 0.9.7c and 0.9.8 [xx XXX xxxx]
*) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
exponent rather than 'unsigned long'. There is a corresponding change to
the new 'rsa_keygen' element of the RSA_METHOD structure.
[Jelte Jansen, Geoff Thorpe]
*) Reduce the chances of duplicate issuer name and serial numbers (in
violation of RFC3280) using the OpenSSL certificate creation utilities.
This is done by creating a random 64 bit value for the initial serial

14
apps/genrsa.c
View file

@ -92,7 +92,6 @@ int MAIN(int argc, char **argv)
ENGINE *e = NULL;
#endif
int ret=1;
RSA *rsa=NULL;
int i,num=DEFBITS;
long l;
const EVP_CIPHER *enc=NULL;
@ -104,6 +103,10 @@ int MAIN(int argc, char **argv)
#endif
char *inrand=NULL;
BIO *out=NULL;
BIGNUM *bn = BN_new();
RSA *rsa = RSA_new();
if(!bn || !rsa) goto err;
apps_startup();
BN_GENCB_set(&cb, genrsa_cb, bio_err);
@ -242,13 +245,11 @@ bad:
BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
num);
if(((rsa = RSA_new()) == NULL) || !RSA_generate_key_ex(rsa, num, f4, &cb))
if(!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, &cb))
goto err;
app_RAND_write_file(NULL, bio_err);
if (rsa == NULL) goto err;
/* We need to do the following for when the base number size is <
* long, esp windows 3.1 :-(. */
l=0L;
@ -272,8 +273,9 @@ bad:
ret=0;
err:
if (rsa != NULL) RSA_free(rsa);
if (out != NULL) BIO_free_all(out);
if (bn) BN_free(bn);
if (rsa) RSA_free(rsa);
if (out) BIO_free_all(out);
if(passout) OPENSSL_free(passout);
if (ret != 0)
ERR_print_errors(bio_err);

6
apps/req.c
View file

@ -748,12 +748,16 @@ bad:
if (pkey_type == TYPE_RSA)
{
RSA *rsa = RSA_new();
if(!rsa || !RSA_generate_key_ex(rsa, newkey, 0x10001, &cb) ||
BIGNUM *bn = BN_new();
if(!bn || !rsa || !BN_set_word(bn, 0x10001) ||
!RSA_generate_key_ex(rsa, newkey, bn, &cb) ||
!EVP_PKEY_assign_RSA(pkey, rsa))
{
if(bn) BN_free(bn);
if(rsa) RSA_free(rsa);
goto end;
}
BN_free(bn);
}
else
#endif

10
apps/s_server.c
View file

@ -1782,17 +1782,20 @@ err:
#ifndef OPENSSL_NO_RSA
static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
{
BIGNUM *bn = NULL;
static RSA *rsa_tmp=NULL;
if (rsa_tmp == NULL)
if (!rsa_tmp && ((bn = BN_new()) == NULL))
BIO_printf(bio_err,"Allocation error in generating RSA key\n");
if (!rsa_tmp && bn)
{
if (!s_quiet)
{
BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
(void)BIO_flush(bio_err);
}
if(((rsa_tmp = RSA_new()) == NULL) || !RSA_generate_key_ex(
rsa_tmp, keylength,RSA_F4,NULL))
if(!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL))
{
if(rsa_tmp) RSA_free(rsa_tmp);
rsa_tmp = NULL;
@ -1802,6 +1805,7 @@ static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
BIO_printf(bio_err,"\n");
(void)BIO_flush(bio_err);
}
BN_free(bn);
}
return(rsa_tmp);
}

4
crypto/rsa/rsa.h
View file

@ -120,7 +120,7 @@ struct rsa_meth_st
* is for behavioural compatibility whilst the code gets rewired, but one day
* it would be nice to assume there are no such things as "builtin software"
* implementations. */
int (*rsa_keygen)(RSA *rsa, int bits, unsigned long e, BN_GENCB *cb);
int (*rsa_keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
};
struct rsa_st
@ -203,7 +203,7 @@ RSA * RSA_generate_key(int bits, unsigned long e,void
#endif /* !defined(OPENSSL_NO_DEPRECATED) */
/* New version */
int RSA_generate_key_ex(RSA *rsa, int bits, unsigned long e, BN_GENCB *cb);
int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
int RSA_check_key(const RSA *);
/* next 4 return -1 on error */

28
crypto/rsa/rsa_depr.c
View file

@ -62,23 +62,39 @@
#include <openssl/bn.h>
#include <openssl/rsa.h>
#ifdef OPENSSL_NO_DEPRECATED
static void *dummy=&dummy;
#ifndef OPENSSL_NO_DEPRECATED
#else
RSA *RSA_generate_key(int bits, unsigned long e_value,
void (*callback)(int,int,void *), void *cb_arg)
{
BN_GENCB cb;
RSA *rsa;
int i;
RSA *rsa = RSA_new();
BIGNUM *e = BN_new();
if((rsa=RSA_new()) == NULL)
return 0;
if(!rsa || !e) goto err;
/* The problem is when building with 8, 16, or 32 BN_ULONG,
* unsigned long can be larger */
for (i=0; i<sizeof(unsigned long)*8; i++)
{
if (e_value & (1UL<<i))
BN_set_bit(e,i);
}
BN_GENCB_set_old(&cb, callback, cb_arg);
if(RSA_generate_key_ex(rsa, bits, e_value, &cb))
if(RSA_generate_key_ex(rsa, bits, e, &cb)) {
BN_free(e);
return rsa;
RSA_free(rsa);
}
err:
if(e) BN_free(e);
if(rsa) RSA_free(rsa);
return 0;
}
#endif

19
crypto/rsa/rsa_gen.c
View file

@ -68,25 +68,24 @@
#include <openssl/bn.h>
#include <openssl/rsa.h>
static int rsa_builtin_keygen(RSA *rsa, int bits, unsigned long e_value, BN_GENCB *cb);
static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb);
/* NB: this wrapper would normally be placed in rsa_lib.c and the static
* implementation would probably be in rsa_eay.c. Nonetheless, is kept here so
* that we don't introduce a new linker dependency. Eg. any application that
* wasn't previously linking object code related to key-generation won't have to
* now just because key-generation is part of RSA_METHOD. */
int RSA_generate_key_ex(RSA *rsa, int bits, unsigned long e_value, BN_GENCB *cb)
int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
{
if(rsa->meth->rsa_keygen)
return rsa->meth->rsa_keygen(rsa, bits, e_value, cb);
return rsa_builtin_keygen(rsa, bits, e_value, cb);
}
static int rsa_builtin_keygen(RSA *rsa, int bits, unsigned long e_value, BN_GENCB *cb)
static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
{
BIGNUM *r0=NULL,*r1=NULL,*r2=NULL,*r3=NULL,*tmp;
int bitsp,bitsq,ok= -1,n=0;
unsigned int i;
BN_CTX *ctx=NULL,*ctx2=NULL;
ctx=BN_CTX_new();
@ -113,17 +112,7 @@ static int rsa_builtin_keygen(RSA *rsa, int bits, unsigned long e_value, BN_GENC
if(!rsa->dmq1 && ((rsa->dmq1=BN_new()) == NULL)) goto err;
if(!rsa->iqmp && ((rsa->iqmp=BN_new()) == NULL)) goto err;
#if 1
/* The problem is when building with 8, 16, or 32 BN_ULONG,
* unsigned long can be larger */
for (i=0; i<sizeof(unsigned long)*8; i++)
{
if (e_value & (1UL<<i))
BN_set_bit(rsa->e,i);
}
#else
if (!BN_set_word(rsa->e,e_value)) goto err;
#endif
BN_copy(rsa->e, e_value);
/* generate p and q */
for (;;)

7
ssl/ssltest.c
View file

@ -1612,17 +1612,19 @@ static RSA *rsa_tmp=NULL;
static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
{
BIGNUM *bn = NULL;
if (rsa_tmp == NULL)
{
bn = BN_new();
rsa_tmp = RSA_new();
if(!rsa_tmp)
if(!bn || !rsa_tmp || !BN_set_word(bn, RSA_F4))
{
BIO_printf(bio_err, "Memory error...");
goto end;
}
BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
(void)BIO_flush(bio_err);
if(!RSA_generate_key_ex(rsa_tmp,keylength,RSA_F4,NULL))
if(!RSA_generate_key_ex(rsa_tmp,keylength,bn,NULL))
{
BIO_printf(bio_err, "Error generating key.");
RSA_free(rsa_tmp);
@ -1632,6 +1634,7 @@ end:
BIO_printf(bio_err,"\n");
(void)BIO_flush(bio_err);
}
if(bn) BN_free(bn);
return(rsa_tmp);
}