--- /dev/null
+/* crypto/dsa/dsa_lib.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/dsa.h>
+#include <openssl/asn1.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#ifndef OPENSSL_NO_DH
+#include <openssl/dh.h>
+#endif
+
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#endif
+
+const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT;
+
+static const DSA_METHOD *default_DSA_method = NULL;
+
+void DSA_set_default_method(const DSA_METHOD *meth)
+ {
+ default_DSA_method = meth;
+ }
+
+const DSA_METHOD *DSA_get_default_method(void)
+ {
+ if(!default_DSA_method)
+ {
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode())
+ return FIPS_dsa_openssl();
+ else
+ return DSA_OpenSSL();
+#else
+ default_DSA_method = DSA_OpenSSL();
+#endif
+ }
+ return default_DSA_method;
+ }
+
+DSA *DSA_new(void)
+ {
+ return DSA_new_method(NULL);
+ }
+
+int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
+ {
+ /* NB: The caller is specifically setting a method, so it's not up to us
+ * to deal with which ENGINE it comes from. */
+ const DSA_METHOD *mtmp;
+ mtmp = dsa->meth;
+ if (mtmp->finish) mtmp->finish(dsa);
+#ifndef OPENSSL_NO_ENGINE
+ if (dsa->engine)
+ {
+ ENGINE_finish(dsa->engine);
+ dsa->engine = NULL;
+ }
+#endif
+ dsa->meth = meth;
+ if (meth->init) meth->init(dsa);
+ return 1;
+ }
+
+DSA *DSA_new_method(ENGINE *engine)
+ {
+ DSA *ret;
+
+ ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
+ if (ret == NULL)
+ {
+ DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+ ret->meth = DSA_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+ if (engine)
+ {
+ if (!ENGINE_init(engine))
+ {
+ DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ ret->engine = engine;
+ }
+ else
+ ret->engine = ENGINE_get_default_DSA();
+ if(ret->engine)
+ {
+ ret->meth = ENGINE_get_DSA(ret->engine);
+ if(!ret->meth)
+ {
+ DSAerr(DSA_F_DSA_NEW_METHOD,
+ ERR_R_ENGINE_LIB);
+ ENGINE_finish(ret->engine);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ }
+#endif
+
+ ret->pad=0;
+ ret->version=0;
+ ret->write_params=1;
+ ret->p=NULL;
+ ret->q=NULL;
+ ret->g=NULL;
+
+ ret->pub_key=NULL;
+ ret->priv_key=NULL;
+
+ ret->kinv=NULL;
+ ret->r=NULL;
+ ret->method_mont_p=NULL;
+
+ ret->references=1;
+ ret->flags=ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret))
+ {
+#ifndef OPENSSL_NO_ENGINE
+ if (ret->engine)
+ ENGINE_finish(ret->engine);
+#endif
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
+ OPENSSL_free(ret);
+ ret=NULL;
+ }
+
+ return(ret);
+ }
+
+void DSA_free(DSA *r)
+ {
+ int i;
+
+ if (r == NULL) return;
+
+ i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
+#ifdef REF_PRINT
+ REF_PRINT("DSA",r);
+#endif
+ if (i > 0) return;
+#ifdef REF_CHECK
+ if (i < 0)
+ {
+ fprintf(stderr,"DSA_free, bad reference count\n");
+ abort();
+ }
+#endif
+
+ if(r->meth->finish)
+ r->meth->finish(r);
+#ifndef OPENSSL_NO_ENGINE
+ if(r->engine)
+ ENGINE_finish(r->engine);
+#endif
+
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
+
+ if (r->p != NULL) BN_clear_free(r->p);
+ if (r->q != NULL) BN_clear_free(r->q);
+ if (r->g != NULL) BN_clear_free(r->g);
+ if (r->pub_key != NULL) BN_clear_free(r->pub_key);
+ if (r->priv_key != NULL) BN_clear_free(r->priv_key);
+ if (r->kinv != NULL) BN_clear_free(r->kinv);
+ if (r->r != NULL) BN_clear_free(r->r);
+ OPENSSL_free(r);
+ }
+
+int DSA_up_ref(DSA *r)
+ {
+ int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
+#ifdef REF_PRINT
+ REF_PRINT("DSA",r);
+#endif
+#ifdef REF_CHECK
+ if (i < 2)
+ {
+ fprintf(stderr, "DSA_up_ref, bad reference count\n");
+ abort();
+ }
+#endif
+ return ((i > 1) ? 1 : 0);
+ }
+
+int DSA_size(const DSA *r)
+ {
+ int ret,i;
+ ASN1_INTEGER bs;
+ unsigned char buf[4]; /* 4 bytes looks really small.
+ However, i2d_ASN1_INTEGER() will not look
+ beyond the first byte, as long as the second
+ parameter is NULL. */
+
+ i=BN_num_bits(r->q);
+ bs.length=(i+7)/8;
+ bs.data=buf;
+ bs.type=V_ASN1_INTEGER;
+ /* If the top bit is set the asn1 encoding is 1 larger. */
+ buf[0]=0xff;
+
+ i=i2d_ASN1_INTEGER(&bs,NULL);
+ i+=i; /* r and s */
+ ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
+ return(ret);
+ }
+
+int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+ {
+ return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
+ new_func, dup_func, free_func);
+ }
+
+int DSA_set_ex_data(DSA *d, int idx, void *arg)
+ {
+ return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
+ }
+
+void *DSA_get_ex_data(DSA *d, int idx)
+ {
+ return(CRYPTO_get_ex_data(&d->ex_data,idx));
+ }
+
+#ifndef OPENSSL_NO_DH
+DH *DSA_dup_DH(const DSA *r)
+ {
+ /* DSA has p, q, g, optional pub_key, optional priv_key.
+ * DH has p, optional length, g, optional pub_key, optional priv_key,
+ * optional q.
+ */
+
+ DH *ret = NULL;
+
+ if (r == NULL)
+ goto err;
+ ret = DH_new();
+ if (ret == NULL)
+ goto err;
+ if (r->p != NULL)
+ if ((ret->p = BN_dup(r->p)) == NULL)
+ goto err;
+ if (r->q != NULL)
+ {
+ ret->length = BN_num_bits(r->q);
+ if ((ret->q = BN_dup(r->q)) == NULL)
+ goto err;
+ }
+ if (r->g != NULL)
+ if ((ret->g = BN_dup(r->g)) == NULL)
+ goto err;
+ if (r->pub_key != NULL)
+ if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
+ goto err;
+ if (r->priv_key != NULL)
+ if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
+ goto err;
+
+ return ret;
+
+ err:
+ if (ret != NULL)
+ DH_free(ret);
+ return NULL;
+ }
+#endif
projects / cassiopeia.git / blobdiff