+/* crypto/ec/ec_print.c */
+/* ====================================================================
+ * Copyright (c) 1998-2002 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
+ * openssl-core@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 <openssl/crypto.h>
+#include "ec_lcl.h"
+
+BIGNUM *EC_POINT_point2bn(const EC_GROUP *group,
+ const EC_POINT *point,
+ point_conversion_form_t form,
+ BIGNUM *ret,
+ BN_CTX *ctx)
+ {
+ size_t buf_len=0;
+ unsigned char *buf;
+
+ buf_len = EC_POINT_point2oct(group, point, form,
+ NULL, 0, ctx);
+ if (buf_len == 0)
+ return NULL;
+
+ if ((buf = OPENSSL_malloc(buf_len)) == NULL)
+ return NULL;
+
+ if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx))
+ {
+ OPENSSL_free(buf);
+ return NULL;
+ }
+
+ ret = BN_bin2bn(buf, buf_len, ret);
+
+ OPENSSL_free(buf);
+
+ return ret;
+}
+
+EC_POINT *EC_POINT_bn2point(const EC_GROUP *group,
+ const BIGNUM *bn,
+ EC_POINT *point,
+ BN_CTX *ctx)
+ {
+ size_t buf_len=0;
+ unsigned char *buf;
+ EC_POINT *ret;
+
+ if ((buf_len = BN_num_bytes(bn)) == 0) return NULL;
+ buf = OPENSSL_malloc(buf_len);
+ if (buf == NULL)
+ return NULL;
+
+ if (!BN_bn2bin(bn, buf))
+ {
+ OPENSSL_free(buf);
+ return NULL;
+ }
+
+ if (point == NULL)
+ {
+ if ((ret = EC_POINT_new(group)) == NULL)
+ {
+ OPENSSL_free(buf);
+ return NULL;
+ }
+ }
+ else
+ ret = point;
+
+ if (!EC_POINT_oct2point(group, ret, buf, buf_len, ctx))
+ {
+ if (point == NULL)
+ EC_POINT_clear_free(ret);
+ OPENSSL_free(buf);
+ return NULL;
+ }
+
+ OPENSSL_free(buf);
+ return ret;
+ }
+
+static const char *HEX_DIGITS = "0123456789ABCDEF";
+
+/* the return value must be freed (using OPENSSL_free()) */
+char *EC_POINT_point2hex(const EC_GROUP *group,
+ const EC_POINT *point,
+ point_conversion_form_t form,
+ BN_CTX *ctx)
+ {
+ char *ret, *p;
+ size_t buf_len=0,i;
+ unsigned char *buf;
+
+ buf_len = EC_POINT_point2oct(group, point, form,
+ NULL, 0, ctx);
+ if (buf_len == 0)
+ return NULL;
+
+ if ((buf = OPENSSL_malloc(buf_len)) == NULL)
+ return NULL;
+
+ if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx))
+ {
+ OPENSSL_free(buf);
+ return NULL;
+ }
+
+ ret = (char *)OPENSSL_malloc(buf_len*2+2);
+ if (ret == NULL)
+ {
+ OPENSSL_free(buf);
+ return NULL;
+ }
+ p = ret;
+ for (i=buf_len; i > 0; i--)
+ {
+ int v = (int) *(buf++);
+ *(p++)=HEX_DIGITS[v>>4];
+ *(p++)=HEX_DIGITS[v&0x0F];
+ }
+ *p='\0';
+
+ return ret;
+ }
+
+EC_POINT *EC_POINT_hex2point(const EC_GROUP *group,
+ const char *buf,
+ EC_POINT *point,
+ BN_CTX *ctx)
+ {
+ EC_POINT *ret=NULL;
+ BIGNUM *tmp_bn=NULL;
+
+ if (!BN_hex2bn(&tmp_bn, buf))
+ return NULL;
+
+ ret = EC_POINT_bn2point(group, tmp_bn, point, ctx);
+
+ BN_clear_free(tmp_bn);
+
+ return ret;
+ }
projects / openssl.git / commitdiff