diff options
Diffstat (limited to 'crypto/ec/ec_print.c')
| -rw-r--r-- | crypto/ec/ec_print.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/crypto/ec/ec_print.c b/crypto/ec/ec_print.c new file mode 100644 index 000000000000..f7c8a303acaf --- /dev/null +++ b/crypto/ec/ec_print.c @@ -0,0 +1,195 @@ +/* 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, *pbuf; + + 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; + pbuf = buf; + for (i=buf_len; i > 0; i--) + { + int v = (int) *(pbuf++); + *(p++)=HEX_DIGITS[v>>4]; + *(p++)=HEX_DIGITS[v&0x0F]; + } + *p='\0'; + + OPENSSL_free(buf); + + 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; + } |