-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2006.
*/
/* ====================================================================
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include <openssl/dh.h>
+#include <openssl/bn.h>
#include "asn1_locl.h"
static void int_dh_free(EVP_PKEY *pkey)
DH_free(pkey->pkey.dh);
}
+static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
+ {
+ const unsigned char *p, *pm;
+ int pklen, pmlen;
+ int ptype;
+ void *pval;
+ ASN1_STRING *pstr;
+ X509_ALGOR *palg;
+ ASN1_INTEGER *public_key = NULL;
+
+ DH *dh = NULL;
+
+ if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
+ return 0;
+ X509_ALGOR_get0(NULL, &ptype, &pval, palg);
+
+ if (ptype != V_ASN1_SEQUENCE)
+ {
+ DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
+ goto err;
+ }
+
+ pstr = pval;
+ pm = pstr->data;
+ pmlen = pstr->length;
+
+ if (!(dh = d2i_DHparams(NULL, &pm, pmlen)))
+ {
+ DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+ goto err;
+ }
+
+ if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+ {
+ DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+ goto err;
+ }
+
+ /* We have parameters now set public key */
+ if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
+ {
+ DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
+ goto err;
+ }
+
+ ASN1_INTEGER_free(public_key);
+ EVP_PKEY_assign_DH(pkey, dh);
+ return 1;
+
+ err:
+ if (public_key)
+ ASN1_INTEGER_free(public_key);
+ if (dh)
+ DH_free(dh);
+ return 0;
+
+ }
+
+static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
+ {
+ DH *dh;
+ void *pval = NULL;
+ int ptype;
+ unsigned char *penc = NULL;
+ int penclen;
+ ASN1_STRING *str;
+ ASN1_INTEGER *pub_key = NULL;
+
+ dh=pkey->pkey.dh;
+
+ str = ASN1_STRING_new();
+ str->length = i2d_DHparams(dh, &str->data);
+ if (str->length <= 0)
+ {
+ DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ pval = str;
+ ptype = V_ASN1_SEQUENCE;
+
+ pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
+ if (!pub_key)
+ goto err;
+
+ penclen = i2d_ASN1_INTEGER(pub_key, &penc);
+
+ ASN1_INTEGER_free(pub_key);
+
+ if (penclen <= 0)
+ {
+ DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DH),
+ ptype, pval, penc, penclen))
+ return 1;
+
+ err:
+ if (penc)
+ OPENSSL_free(penc);
+ if (pval)
+ ASN1_STRING_free(pval);
+
+ return 0;
+ }
+
+
+/* PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in
+ * that the AlgorithmIdentifier contains the paramaters, the private key
+ * is explcitly included and the pubkey must be recalculated.
+ */
+
+static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
+ {
+ const unsigned char *p, *pm;
+ int pklen, pmlen;
+ int ptype;
+ void *pval;
+ ASN1_STRING *pstr;
+ X509_ALGOR *palg;
+ ASN1_INTEGER *privkey = NULL;
+
+ DH *dh = NULL;
+
+ if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
+ return 0;
+
+ X509_ALGOR_get0(NULL, &ptype, &pval, palg);
+
+ if (ptype != V_ASN1_SEQUENCE)
+ goto decerr;
+
+ if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+ goto decerr;
+
+
+ pstr = pval;
+ pm = pstr->data;
+ pmlen = pstr->length;
+ if (!(dh = d2i_DHparams(NULL, &pm, pmlen)))
+ goto decerr;
+ /* We have parameters now set private key */
+ if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
+ {
+ DHerr(DH_F_DH_PRIV_DECODE,DH_R_BN_ERROR);
+ goto dherr;
+ }
+ /* Calculate public key */
+ if (!DH_generate_key(dh))
+ goto dherr;
+
+ EVP_PKEY_assign_DH(pkey, dh);
+
+ ASN1_INTEGER_free(privkey);
+
+ return 1;
+
+ decerr:
+ DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
+ dherr:
+ DH_free(dh);
+ return 0;
+ }
+
+static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
+{
+ ASN1_STRING *params = NULL;
+ ASN1_INTEGER *prkey = NULL;
+ unsigned char *dp = NULL;
+ int dplen;
+
+ params = ASN1_STRING_new();
+
+ if (!params)
+ {
+ DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ params->length = i2d_DHparams(pkey->pkey.dh, ¶ms->data);
+ if (params->length <= 0)
+ {
+ DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ params->type = V_ASN1_SEQUENCE;
+
+ /* Get private key into integer */
+ prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
+
+ if (!prkey)
+ {
+ DHerr(DH_F_DH_PRIV_ENCODE,DH_R_BN_ERROR);
+ goto err;
+ }
+
+ dplen = i2d_ASN1_INTEGER(prkey, &dp);
+
+ ASN1_INTEGER_free(prkey);
+
+ if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dhKeyAgreement), 0,
+ V_ASN1_SEQUENCE, params, dp, dplen))
+ goto err;
+
+ return 1;
+
+err:
+ if (dp != NULL)
+ OPENSSL_free(dp);
+ if (params != NULL)
+ ASN1_STRING_free(params);
+ if (prkey != NULL)
+ ASN1_INTEGER_free(prkey);
+ return 0;
+}
+
+
+static void update_buflen(const BIGNUM *b, size_t *pbuflen)
+ {
+ size_t i;
+ if (!b)
+ return;
+ if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
+ *pbuflen = i;
+ }
+
static int dh_param_decode(EVP_PKEY *pkey,
const unsigned char **pder, int derlen)
{
return i2d_DHparams(pkey->pkey.dh, pder);
}
-static int do_dhparam_print(BIO *bp, const DH *x, int indent,
- ASN1_PCTX *ctx)
+static int do_dh_print(BIO *bp, const DH *x, int indent,
+ ASN1_PCTX *ctx, int ptype)
{
unsigned char *m=NULL;
int reason=ERR_R_BUF_LIB,ret=0;
- size_t buf_len=0, i;
+ size_t buf_len=0;
+
+ const char *ktype = NULL;
+
+ BIGNUM *priv_key, *pub_key;
- if (x->p)
- buf_len = (size_t)BN_num_bytes(x->p);
+ if (ptype == 2)
+ priv_key = x->priv_key;
else
+ priv_key = NULL;
+
+ if (ptype > 0)
+ pub_key = x->pub_key;
+ else
+ pub_key = NULL;
+
+ update_buflen(x->p, &buf_len);
+
+ if (buf_len == 0)
{
reason = ERR_R_PASSED_NULL_PARAMETER;
goto err;
}
- if (x->g)
- if (buf_len < (i = (size_t)BN_num_bytes(x->g)))
- buf_len = i;
- m=(unsigned char *)OPENSSL_malloc(buf_len+10);
+
+ update_buflen(x->g, &buf_len);
+ update_buflen(pub_key, &buf_len);
+ update_buflen(priv_key, &buf_len);
+
+ if (ptype == 2)
+ ktype = "PKCS#3 DH Private-Key";
+ else if (ptype == 1)
+ ktype = "PKCS#3 DH Public-Key";
+ else
+ ktype = "PKCS#3 DH Parameters";
+
+ m= OPENSSL_malloc(buf_len+10);
if (m == NULL)
{
reason=ERR_R_MALLOC_FAILURE;
}
BIO_indent(bp, indent, 128);
- if (BIO_printf(bp,"Diffie-Hellman-Parameters: (%d bit)\n",
- BN_num_bits(x->p)) <= 0)
+ if (BIO_printf(bp,"%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0)
goto err;
indent += 4;
+
+ if (!ASN1_bn_print(bp,"private-key:",priv_key,m,indent)) goto err;
+ if (!ASN1_bn_print(bp,"public-key:",pub_key,m,indent)) goto err;
+
if (!ASN1_bn_print(bp,"prime:",x->p,m,indent)) goto err;
if (!ASN1_bn_print(bp,"generator:",x->g,m,indent)) goto err;
if (x->length != 0)
if (BIO_printf(bp,"recommended-private-length: %d bits\n",
(int)x->length) <= 0) goto err;
}
+
+
ret=1;
if (0)
{
err:
- DHerr(DH_F_DHPARAMS_PRINT,reason);
+ DHerr(DH_F_DO_DH_PRINT,reason);
}
if (m != NULL) OPENSSL_free(m);
return(ret);
}
+static int int_dh_size(const EVP_PKEY *pkey)
+ {
+ return(DH_size(pkey->pkey.dh));
+ }
+
+static int dh_bits(const EVP_PKEY *pkey)
+ {
+ return BN_num_bits(pkey->pkey.dh->p);
+ }
+
+static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ if ( BN_cmp(a->pkey.dh->p,b->pkey.dh->p) ||
+ BN_cmp(a->pkey.dh->g,b->pkey.dh->g))
+ return 0;
+ else
+ return 1;
+ }
+
+static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
+ {
+ BIGNUM *a;
+
+ if ((a=BN_dup(from->pkey.dh->p)) == NULL)
+ return 0;
+ if (to->pkey.dh->p != NULL)
+ BN_free(to->pkey.dh->p);
+ to->pkey.dh->p=a;
+
+ if ((a=BN_dup(from->pkey.dh->g)) == NULL)
+ return 0;
+ if (to->pkey.dh->g != NULL)
+ BN_free(to->pkey.dh->g);
+ to->pkey.dh->g=a;
+
+ return 1;
+ }
+
+static int dh_missing_parameters(const EVP_PKEY *a)
+ {
+ if (!a->pkey.dh->p || !a->pkey.dh->g)
+ return 1;
+ return 0;
+ }
+
+static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ if (dh_cmp_parameters(a, b) == 0)
+ return 0;
+ if (BN_cmp(b->pkey.dh->pub_key,a->pkey.dh->pub_key) != 0)
+ return 0;
+ else
+ return 1;
+ }
+
static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *ctx)
{
- return do_dhparam_print(bp, pkey->pkey.dh, indent, ctx);
+ return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0);
+ }
+
+static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1);
+ }
+
+static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2);
}
int DHparams_print(BIO *bp, const DH *x)
{
- return do_dhparam_print(bp, x, 4, NULL);
+ return do_dh_print(bp, x, 4, NULL, 0);
}
const EVP_PKEY_ASN1_METHOD dh_asn1_meth =
"DH",
"OpenSSL PKCS#3 DH method",
- 0,
- 0,
- 0,
- 0,
+ dh_pub_decode,
+ dh_pub_encode,
+ dh_pub_cmp,
+ dh_public_print,
- 0,
- 0,
- 0,
+ dh_priv_decode,
+ dh_priv_encode,
+ dh_private_print,
- 0,
- 0,
+ int_dh_size,
+ dh_bits,
dh_param_decode,
dh_param_encode,
- 0,0,0,
+ dh_missing_parameters,
+ dh_copy_parameters,
+ dh_cmp_parameters,
dh_param_print,
+ 0,
int_dh_free,
0
projects / openssl.git / blobdiff