/* $OpenBSD: evp_asn1.c,v 1.19 2017/01/29 17:49:22 beck Exp $ */ /* 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.] */ #include #include #include #include #include int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) { ASN1_STRING *os; if ((os = ASN1_OCTET_STRING_new()) == NULL) return (0); if (!ASN1_STRING_set(os, data, len)) { ASN1_OCTET_STRING_free(os); return (0); } ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os); return (1); } /* int max_len: for returned value */ int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len) { int ret, num; unsigned char *p; if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) { ASN1error(ASN1_R_DATA_IS_WRONG); return (-1); } p = ASN1_STRING_data(a->value.octet_string); ret = ASN1_STRING_length(a->value.octet_string); if (ret < max_len) num = ret; else num = max_len; memcpy(data, p, num); return (ret); } int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, int len) { int n, size; ASN1_OCTET_STRING os, *osp; ASN1_INTEGER in; unsigned char *p; unsigned char buf[32]; /* when they have 256bit longs, * I'll be in trouble */ in.data = buf; in.length = 32; os.data = data; os.type = V_ASN1_OCTET_STRING; os.length = len; ASN1_INTEGER_set(&in, num); n = i2d_ASN1_INTEGER(&in, NULL); n += i2d_ASN1_bytes((ASN1_STRING *)&os, NULL, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL); size = ASN1_object_size(1, n, V_ASN1_SEQUENCE); if ((osp = ASN1_STRING_new()) == NULL) return (0); /* Grow the 'string' */ if (!ASN1_STRING_set(osp, NULL, size)) { ASN1_STRING_free(osp); return (0); } ASN1_STRING_length_set(osp, size); p = ASN1_STRING_data(osp); ASN1_put_object(&p, 1,n, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL); i2d_ASN1_INTEGER(&in, &p); i2d_ASN1_bytes((ASN1_STRING *)&os, &p, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL); ASN1_TYPE_set(a, V_ASN1_SEQUENCE, osp); return (1); } /* we return the actual length..., num may be missing, in which * case, set it to zero */ /* int max_len: for returned value */ int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data, int max_len) { int ret = -1, n; ASN1_INTEGER *ai = NULL; ASN1_OCTET_STRING *os = NULL; const unsigned char *p; long length; ASN1_const_CTX c; if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) { goto err; } p = ASN1_STRING_data(a->value.sequence); length = ASN1_STRING_length(a->value.sequence); c.pp = &p; c.p = p; c.max = p + length; c.error = ASN1_R_DATA_IS_WRONG; M_ASN1_D2I_start_sequence(); c.q = c.p; if ((ai = d2i_ASN1_INTEGER(NULL, &c.p, c.slen)) == NULL) goto err; c.slen -= (c.p - c.q); c.q = c.p; if ((os = d2i_ASN1_OCTET_STRING(NULL, &c.p, c.slen)) == NULL) goto err; c.slen -= (c.p - c.q); if (!M_ASN1_D2I_end_sequence()) goto err; if (num != NULL) *num = ASN1_INTEGER_get(ai); ret = ASN1_STRING_length(os); if (max_len > ret) n = ret; else n = max_len; if (data != NULL) memcpy(data, ASN1_STRING_data(os), n); if (0) { err: ASN1error(ASN1_R_DATA_IS_WRONG); } ASN1_OCTET_STRING_free(os); ASN1_INTEGER_free(ai); return (ret); }