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authorArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
committerArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
commit3e4d8f433239c40311037616b1b8833a06651ae0 (patch)
tree98ab7fce0d011d34677b0beb762d389cb5c39199 /openssl/crypto/dh/dh_ameth.c
Initial import
Diffstat (limited to 'openssl/crypto/dh/dh_ameth.c')
-rw-r--r--openssl/crypto/dh/dh_ameth.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/openssl/crypto/dh/dh_ameth.c b/openssl/crypto/dh/dh_ameth.c
new file mode 100644
index 00000000..377caf96
--- /dev/null
+++ b/openssl/crypto/dh/dh_ameth.c
@@ -0,0 +1,500 @@
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#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, &params->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)
+ {
+ DH *dh;
+ if (!(dh = d2i_DHparams(NULL, pder, derlen)))
+ {
+ DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_DH(pkey, dh);
+ return 1;
+ }
+
+static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
+ {
+ return i2d_DHparams(pkey->pkey.dh, pder);
+ }
+
+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;
+
+ const char *ktype = NULL;
+
+ BIGNUM *priv_key, *pub_key;
+
+ 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;
+ }
+
+ 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;
+ goto err;
+ }
+
+ BIO_indent(bp, indent, 128);
+ 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)
+ {
+ BIO_indent(bp, indent, 128);
+ if (BIO_printf(bp,"recommended-private-length: %d bits\n",
+ (int)x->length) <= 0) goto err;
+ }
+
+
+ ret=1;
+ if (0)
+ {
+err:
+ 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_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_dh_print(bp, x, 4, NULL, 0);
+ }
+
+const EVP_PKEY_ASN1_METHOD dh_asn1_meth =
+ {
+ EVP_PKEY_DH,
+ EVP_PKEY_DH,
+ 0,
+
+ "DH",
+ "OpenSSL PKCS#3 DH method",
+
+ dh_pub_decode,
+ dh_pub_encode,
+ dh_pub_cmp,
+ dh_public_print,
+
+ dh_priv_decode,
+ dh_priv_encode,
+ dh_private_print,
+
+ int_dh_size,
+ dh_bits,
+
+ dh_param_decode,
+ dh_param_encode,
+ dh_missing_parameters,
+ dh_copy_parameters,
+ dh_cmp_parameters,
+ dh_param_print,
+
+ int_dh_free,
+ 0
+ };
+