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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/dsa/dsa_ameth.c
Initial import
Diffstat (limited to 'openssl/crypto/dsa/dsa_ameth.c')
-rw-r--r--openssl/crypto/dsa/dsa_ameth.c657
1 files changed, 657 insertions, 0 deletions
diff --git a/openssl/crypto/dsa/dsa_ameth.c b/openssl/crypto/dsa/dsa_ameth.c
new file mode 100644
index 00000000..6413aae4
--- /dev/null
+++ b/openssl/crypto/dsa/dsa_ameth.c
@@ -0,0 +1,657 @@
+/* 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/dsa.h>
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_CMS
+#include <openssl/cms.h>
+#endif
+#include "asn1_locl.h"
+
+static int dsa_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;
+
+ DSA *dsa = 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)
+ {
+ pstr = pval;
+ pm = pstr->data;
+ pmlen = pstr->length;
+
+ if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
+ {
+ DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
+ goto err;
+ }
+
+ }
+ else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
+ {
+ if (!(dsa = DSA_new()))
+ {
+ DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ }
+ else
+ {
+ DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
+ goto err;
+ }
+
+ if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+ {
+ DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
+ goto err;
+ }
+
+ if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
+ {
+ DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
+ goto err;
+ }
+
+ ASN1_INTEGER_free(public_key);
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ return 1;
+
+ err:
+ if (public_key)
+ ASN1_INTEGER_free(public_key);
+ if (dsa)
+ DSA_free(dsa);
+ return 0;
+
+ }
+
+static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
+ {
+ DSA *dsa;
+ void *pval = NULL;
+ int ptype;
+ unsigned char *penc = NULL;
+ int penclen;
+
+ dsa=pkey->pkey.dsa;
+ if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
+ {
+ ASN1_STRING *str;
+ str = ASN1_STRING_new();
+ str->length = i2d_DSAparams(dsa, &str->data);
+ if (str->length <= 0)
+ {
+ DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ pval = str;
+ ptype = V_ASN1_SEQUENCE;
+ }
+ else
+ ptype = V_ASN1_UNDEF;
+
+ dsa->write_params=0;
+
+ penclen = i2d_DSAPublicKey(dsa, &penc);
+
+ if (penclen <= 0)
+ {
+ DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
+ ptype, pval, penc, penclen))
+ return 1;
+
+ err:
+ if (penc)
+ OPENSSL_free(penc);
+ if (pval)
+ ASN1_STRING_free(pval);
+
+ return 0;
+ }
+
+/* In PKCS#8 DSA: you just get a private key integer and parameters in the
+ * AlgorithmIdentifier the pubkey must be recalculated.
+ */
+
+static int dsa_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;
+ BN_CTX *ctx = NULL;
+
+ STACK_OF(ASN1_TYPE) *ndsa = NULL;
+ DSA *dsa = NULL;
+
+ if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
+ return 0;
+ X509_ALGOR_get0(NULL, &ptype, &pval, palg);
+
+ /* Check for broken DSA PKCS#8, UGH! */
+ if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
+ {
+ ASN1_TYPE *t1, *t2;
+ if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
+ goto decerr;
+ if (sk_ASN1_TYPE_num(ndsa) != 2)
+ goto decerr;
+ /* Handle Two broken types:
+ * SEQUENCE {parameters, priv_key}
+ * SEQUENCE {pub_key, priv_key}
+ */
+
+ t1 = sk_ASN1_TYPE_value(ndsa, 0);
+ t2 = sk_ASN1_TYPE_value(ndsa, 1);
+ if (t1->type == V_ASN1_SEQUENCE)
+ {
+ p8->broken = PKCS8_EMBEDDED_PARAM;
+ pval = t1->value.ptr;
+ }
+ else if (ptype == V_ASN1_SEQUENCE)
+ p8->broken = PKCS8_NS_DB;
+ else
+ goto decerr;
+
+ if (t2->type != V_ASN1_INTEGER)
+ goto decerr;
+
+ privkey = t2->value.integer;
+ }
+ else
+ {
+ const unsigned char *q = p;
+ if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
+ goto decerr;
+ if (privkey->type == V_ASN1_NEG_INTEGER)
+ {
+ p8->broken = PKCS8_NEG_PRIVKEY;
+ ASN1_INTEGER_free(privkey);
+ if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen)))
+ goto decerr;
+ }
+ if (ptype != V_ASN1_SEQUENCE)
+ goto decerr;
+ }
+
+ pstr = pval;
+ pm = pstr->data;
+ pmlen = pstr->length;
+ if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
+ goto decerr;
+ /* We have parameters now set private key */
+ if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
+ {
+ DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
+ goto dsaerr;
+ }
+ /* Calculate public key */
+ if (!(dsa->pub_key = BN_new()))
+ {
+ DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
+ goto dsaerr;
+ }
+ if (!(ctx = BN_CTX_new()))
+ {
+ DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
+ goto dsaerr;
+ }
+
+ if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
+ {
+ DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
+ goto dsaerr;
+ }
+
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ BN_CTX_free (ctx);
+ if(ndsa)
+ sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
+ else
+ ASN1_INTEGER_free(privkey);
+
+ return 1;
+
+ decerr:
+ DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
+ dsaerr:
+ BN_CTX_free (ctx);
+ if (privkey)
+ ASN1_INTEGER_free(privkey);
+ sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
+ DSA_free(dsa);
+ return 0;
+ }
+
+static int dsa_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)
+ {
+ DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
+ if (params->length <= 0)
+ {
+ DSAerr(DSA_F_DSA_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.dsa->priv_key, NULL);
+
+ if (!prkey)
+ {
+ DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
+ goto err;
+ }
+
+ dplen = i2d_ASN1_INTEGER(prkey, &dp);
+
+ ASN1_INTEGER_free(prkey);
+
+ if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 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 int int_dsa_size(const EVP_PKEY *pkey)
+ {
+ return(DSA_size(pkey->pkey.dsa));
+ }
+
+static int dsa_bits(const EVP_PKEY *pkey)
+ {
+ return BN_num_bits(pkey->pkey.dsa->p);
+ }
+
+static int dsa_missing_parameters(const EVP_PKEY *pkey)
+ {
+ DSA *dsa;
+ dsa=pkey->pkey.dsa;
+ if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
+ return 1;
+ return 0;
+ }
+
+static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
+ {
+ BIGNUM *a;
+
+ if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
+ return 0;
+ if (to->pkey.dsa->p != NULL)
+ BN_free(to->pkey.dsa->p);
+ to->pkey.dsa->p=a;
+
+ if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
+ return 0;
+ if (to->pkey.dsa->q != NULL)
+ BN_free(to->pkey.dsa->q);
+ to->pkey.dsa->q=a;
+
+ if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
+ return 0;
+ if (to->pkey.dsa->g != NULL)
+ BN_free(to->pkey.dsa->g);
+ to->pkey.dsa->g=a;
+ return 1;
+ }
+
+static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
+ BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
+ BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
+ return 0;
+ else
+ return 1;
+ }
+
+static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
+ return 0;
+ else
+ return 1;
+ }
+
+static void int_dsa_free(EVP_PKEY *pkey)
+ {
+ DSA_free(pkey->pkey.dsa);
+ }
+
+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 do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
+ {
+ unsigned char *m=NULL;
+ int ret=0;
+ size_t buf_len=0;
+ const char *ktype = NULL;
+
+ const 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;
+
+ if (ptype == 2)
+ ktype = "Private-Key";
+ else if (ptype == 1)
+ ktype = "Public-Key";
+ else
+ ktype = "DSA-Parameters";
+
+ update_buflen(x->p, &buf_len);
+ update_buflen(x->q, &buf_len);
+ update_buflen(x->g, &buf_len);
+ update_buflen(priv_key, &buf_len);
+ update_buflen(pub_key, &buf_len);
+
+ m=(unsigned char *)OPENSSL_malloc(buf_len+10);
+ if (m == NULL)
+ {
+ DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (priv_key)
+ {
+ if(!BIO_indent(bp,off,128))
+ goto err;
+ if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
+ <= 0) goto err;
+ }
+
+ if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
+ goto err;
+ if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
+ goto err;
+ if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
+ if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
+ if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
+ ret=1;
+err:
+ if (m != NULL) OPENSSL_free(m);
+ return(ret);
+ }
+
+static int dsa_param_decode(EVP_PKEY *pkey,
+ const unsigned char **pder, int derlen)
+ {
+ DSA *dsa;
+ if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
+ {
+ DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ return 1;
+ }
+
+static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
+ {
+ return i2d_DSAparams(pkey->pkey.dsa, pder);
+ }
+
+static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
+ }
+
+static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
+ }
+
+
+static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
+ }
+
+static int old_dsa_priv_decode(EVP_PKEY *pkey,
+ const unsigned char **pder, int derlen)
+ {
+ DSA *dsa;
+ if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
+ {
+ DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ return 1;
+ }
+
+static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
+ {
+ return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
+ }
+
+static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
+ {
+ switch (op)
+ {
+ case ASN1_PKEY_CTRL_PKCS7_SIGN:
+ if (arg1 == 0)
+ {
+ int snid, hnid;
+ X509_ALGOR *alg1, *alg2;
+ PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
+ if (alg1 == NULL || alg1->algorithm == NULL)
+ return -1;
+ hnid = OBJ_obj2nid(alg1->algorithm);
+ if (hnid == NID_undef)
+ return -1;
+ if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
+ return -1;
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
+ }
+ return 1;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_SIGN:
+ if (arg1 == 0)
+ {
+ int snid, hnid;
+ X509_ALGOR *alg1, *alg2;
+ CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
+ if (alg1 == NULL || alg1->algorithm == NULL)
+ return -1;
+ hnid = OBJ_obj2nid(alg1->algorithm);
+ if (hnid == NID_undef)
+ return -1;
+ if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
+ return -1;
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
+ }
+ return 1;
+#endif
+
+ case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
+ *(int *)arg2 = NID_sha1;
+ return 2;
+
+ default:
+ return -2;
+
+ }
+
+ }
+
+/* NB these are sorted in pkey_id order, lowest first */
+
+const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
+ {
+
+ {
+ EVP_PKEY_DSA2,
+ EVP_PKEY_DSA,
+ ASN1_PKEY_ALIAS
+ },
+
+ {
+ EVP_PKEY_DSA1,
+ EVP_PKEY_DSA,
+ ASN1_PKEY_ALIAS
+ },
+
+ {
+ EVP_PKEY_DSA4,
+ EVP_PKEY_DSA,
+ ASN1_PKEY_ALIAS
+ },
+
+ {
+ EVP_PKEY_DSA3,
+ EVP_PKEY_DSA,
+ ASN1_PKEY_ALIAS
+ },
+
+ {
+ EVP_PKEY_DSA,
+ EVP_PKEY_DSA,
+ 0,
+
+ "DSA",
+ "OpenSSL DSA method",
+
+ dsa_pub_decode,
+ dsa_pub_encode,
+ dsa_pub_cmp,
+ dsa_pub_print,
+
+ dsa_priv_decode,
+ dsa_priv_encode,
+ dsa_priv_print,
+
+ int_dsa_size,
+ dsa_bits,
+
+ dsa_param_decode,
+ dsa_param_encode,
+ dsa_missing_parameters,
+ dsa_copy_parameters,
+ dsa_cmp_parameters,
+ dsa_param_print,
+
+ int_dsa_free,
+ dsa_pkey_ctrl,
+ old_dsa_priv_decode,
+ old_dsa_priv_encode
+ }
+ };
+