tasn_prn.c

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/* tasn_prn.c */
/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000,2005 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */


#include <stddef.h>
#include "cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/objects.h>
#include <openssl/buffer.h>
#include <openssl/err.h>
#include <openssl/x509v3.h>
#include "asn1_locl.h"

/* Print routines.
 */

/* ASN1_PCTX routines */

ASN1_PCTX default_pctx = 
    {
    ASN1_PCTX_FLAGS_SHOW_ABSENT,    /* flags */
    0,  /* nm_flags */
    0,  /* cert_flags */
    0,  /* oid_flags */
    0   /* str_flags */
    };
    

ASN1_PCTX *ASN1_PCTX_new(void)
    {
    ASN1_PCTX *ret;
    ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
    if (ret == NULL)
        {
        ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
        return NULL;
        }
    ret->flags = 0;
    ret->nm_flags = 0;
    ret->cert_flags = 0;
    ret->oid_flags = 0;
    ret->str_flags = 0;
    return ret;
    }

void ASN1_PCTX_free(ASN1_PCTX *p)
    {
    OPENSSL_free(p);
    }

unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
    {
    return p->flags;
    }

void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
    {
    p->flags = flags;
    }

unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
    {
    return p->nm_flags;
    }

void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
    {
    p->nm_flags = flags;
    }

unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
    {
    return p->cert_flags;
    }

void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
    {
    p->cert_flags = flags;
    }

unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
    {
    return p->oid_flags;
    }

void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
    {
    p->oid_flags = flags;
    }

unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
    {
    return p->str_flags;
    }

void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
    {
    p->str_flags = flags;
    }

/* Main print routines */

static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                const ASN1_ITEM *it,
                const char *fname, const char *sname,
                int nohdr, const ASN1_PCTX *pctx);

int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);

static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
                const ASN1_ITEM *it, int indent,
                const char *fname, const char *sname,
                const ASN1_PCTX *pctx);

static int asn1_print_fsname(BIO *out, int indent,
            const char *fname, const char *sname,
            const ASN1_PCTX *pctx);

int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
                const ASN1_ITEM *it, const ASN1_PCTX *pctx)
    {
    const char *sname;
    if (pctx == NULL)
        pctx = &default_pctx;
    if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
        sname = NULL;
    else
        sname = it->sname;
    return asn1_item_print_ctx(out, &ifld, indent, it,
                            NULL, sname, 0, pctx);
    }

static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                const ASN1_ITEM *it,
                const char *fname, const char *sname,
                int nohdr, const ASN1_PCTX *pctx)
    {
    const ASN1_TEMPLATE *tt;
    const ASN1_EXTERN_FUNCS *ef;
    ASN1_VALUE **tmpfld;
    const ASN1_AUX *aux = it->funcs;
    ASN1_aux_cb *asn1_cb;
    ASN1_PRINT_ARG parg;
    int i;
    if (aux && aux->asn1_cb)
        {
        parg.out = out;
        parg.indent = indent;
        parg.pctx = pctx;
        asn1_cb = aux->asn1_cb;
        }
    else asn1_cb = 0;

    if(*fld == NULL)
        {
        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT)
            {
            if (!nohdr && !asn1_print_fsname(out, indent,
                            fname, sname, pctx))
                return 0;
            if (BIO_puts(out, "<ABSENT>\n") <= 0)
                return 0;
            }
        return 1;
        }

    switch(it->itype)
        {
        case ASN1_ITYPE_PRIMITIVE:
        if(it->templates)
            {
            if (!asn1_template_print_ctx(out, fld, indent,
                            it->templates, pctx))
                return 0;
            }
        /* fall thru */
        case ASN1_ITYPE_MSTRING:
        if (!asn1_primitive_print(out, fld, it,
                indent, fname, sname,pctx))
            return 0;
        break;

        case ASN1_ITYPE_EXTERN:
        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
            return 0;
        /* Use new style print routine if possible */
        ef = it->funcs;
        if (ef && ef->asn1_ex_print)
            {
            i = ef->asn1_ex_print(out, fld, indent, "", pctx);
            if (!i)
                return 0;
            if ((i == 2) && (BIO_puts(out, "\n") <= 0))
                return 0;
            return 1;
            }
        else if (sname && 
            BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
            return 0;
        break;

        case ASN1_ITYPE_CHOICE:
#if 0
        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
            return 0;
#endif
        /* CHOICE type, get selector */
        i = asn1_get_choice_selector(fld, it);
        /* This should never happen... */
        if((i < 0) || (i >= it->tcount))
            {
            if (BIO_printf(out,
                "ERROR: selector [%d] invalid\n", i) <= 0)
                return 0;
            return 1;
            }
        tt = it->templates + i;
        tmpfld = asn1_get_field_ptr(fld, tt);
        if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
            return 0;
        break;

        case ASN1_ITYPE_SEQUENCE:
        case ASN1_ITYPE_NDEF_SEQUENCE:
        if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
            return 0;
        if (fname || sname)
            {
            if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
                {
                if (BIO_puts(out, " {\n") <= 0)
                    return 0;
                }
            else
                {
                if (BIO_puts(out, "\n") <= 0)
                    return 0;
                }
            }

        if (asn1_cb)
            {
            i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
            if (i == 0)
                return 0;
            if (i == 2)
                return 1;
            }

        /* Print each field entry */
        for(i = 0, tt = it->templates; i < it->tcount; i++, tt++)
            {
            const ASN1_TEMPLATE *seqtt;
            seqtt = asn1_do_adb(fld, tt, 1);
            tmpfld = asn1_get_field_ptr(fld, seqtt);
            if (!asn1_template_print_ctx(out, tmpfld,
                        indent + 2, seqtt, pctx))
                return 0;
            }
        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
            {
            if (BIO_printf(out, "%*s}\n", indent, "") < 0)
                return 0;
            }

        if (asn1_cb)
            {
            i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
            if (i == 0)
                return 0;
            }
        break;

        default:
        BIO_printf(out, "Unprocessed type %d\n", it->itype);
        return 0;
        }

    return 1;
    }

int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
                const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
    {
    int i, flags;
    const char *sname, *fname;
    flags = tt->flags;
    if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
        sname = ASN1_ITEM_ptr(tt->item)->sname;
    else
        sname = NULL;
    if(pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
        fname = NULL;
    else
        fname = tt->field_name;
    if(flags & ASN1_TFLG_SK_MASK)
        {
        char *tname;
        ASN1_VALUE *skitem;
        STACK_OF(ASN1_VALUE) *stack;

        /* SET OF, SEQUENCE OF */
        if (fname)
            {
            if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF)
                {
                if(flags & ASN1_TFLG_SET_OF)
                    tname = "SET";
                else
                    tname = "SEQUENCE";
                if (BIO_printf(out, "%*s%s OF %s {\n",
                    indent, "", tname, tt->field_name) <= 0)
                    return 0;
                }
            else if (BIO_printf(out, "%*s%s:\n", indent, "",
                    fname) <= 0)
                return 0;
            }
        stack = (STACK_OF(ASN1_VALUE) *)*fld;
        for(i = 0; i < sk_ASN1_VALUE_num(stack); i++)
            {
            if ((i > 0) && (BIO_puts(out, "\n") <= 0))
                return 0;

            skitem = sk_ASN1_VALUE_value(stack, i);
            if (!asn1_item_print_ctx(out, &skitem, indent + 2,
                ASN1_ITEM_ptr(tt->item), NULL, NULL, 1, pctx))
                return 0;
            }
        if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
                return 0;
        if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
            {
            if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
                return 0;
            }
        return 1;
        }
    return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
                            fname, sname, 0, pctx);
    }

static int asn1_print_fsname(BIO *out, int indent,
            const char *fname, const char *sname,
            const ASN1_PCTX *pctx)
    {
    static char spaces[] = "                    ";
    const int nspaces = sizeof(spaces) - 1;

#if 0
    if (!sname && !fname)
        return 1;
#endif

    while (indent > nspaces)
        {
        if (BIO_write(out, spaces, nspaces) != nspaces)
            return 0;
        indent -= nspaces;
        }
    if (BIO_write(out, spaces, indent) != indent)
        return 0;
    if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
        sname = NULL;
    if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
        fname = NULL;
    if (!sname && !fname)
        return 1;
    if (fname)
        {
        if (BIO_puts(out, fname) <= 0)
            return 0;
        }
    if (sname)
        {
        if (fname)
            {
            if (BIO_printf(out, " (%s)", sname) <= 0)
                return 0;
            }
        else
            {
            if (BIO_puts(out, sname) <= 0)
                return 0;
            }
        }
    if (BIO_write(out, ": ", 2) != 2)
        return 0;
    return 1;
    }

static int asn1_print_boolean_ctx(BIO *out, int boolval,
                            const ASN1_PCTX *pctx)
    {
    const char *str;
    switch (boolval)
        {
        case -1:
        str = "BOOL ABSENT";
        break;

        case 0:
        str = "FALSE";
        break;

        default:
        str = "TRUE";
        break;

        }

    if (BIO_puts(out, str) <= 0)
        return 0;
    return 1;

    }

static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
                        const ASN1_PCTX *pctx)
    {
    char *s;
    int ret = 1;
    s = i2s_ASN1_INTEGER(NULL, str);
    if (BIO_puts(out, s) <= 0)
        ret = 0;
    OPENSSL_free(s);
    return ret;
    }

static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
                        const ASN1_PCTX *pctx)
    {
    char objbuf[80];
    const char *ln;
    ln = OBJ_nid2ln(OBJ_obj2nid(oid));
    if(!ln)
        ln = "";
    OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
    if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
        return 0;
    return 1;
    }

static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
                        const ASN1_PCTX *pctx)
    {
    if (str->type == V_ASN1_BIT_STRING)
        {
        if (BIO_printf(out, " (%ld unused bits)\n",
                    str->flags & 0x7) <= 0)
                return 0;
        }
    else if (BIO_puts(out, "\n") <= 0)
        return 0;
    if ((str->length > 0)
        && BIO_dump_indent(out, (char *)str->data, str->length,
                indent + 2) <= 0)
        return 0;
    return 1;
    }

static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
                const ASN1_ITEM *it, int indent,
                const char *fname, const char *sname,
                const ASN1_PCTX *pctx)
    {
    long utype;
    ASN1_STRING *str;
    int ret = 1, needlf = 1;
    const char *pname;
    const ASN1_PRIMITIVE_FUNCS *pf;
    pf = it->funcs;
    if (!asn1_print_fsname(out, indent, fname, sname, pctx))
            return 0;
    if (pf && pf->prim_print)
        return pf->prim_print(out, fld, it, indent, pctx);
    str = (ASN1_STRING *)*fld;
    if (it->itype == ASN1_ITYPE_MSTRING)
        utype = str->type & ~V_ASN1_NEG;
    else
        utype = it->utype;
    if (utype == V_ASN1_ANY)
        {
        ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
        utype = atype->type;
        fld = &atype->value.asn1_value;
        str = (ASN1_STRING *)*fld;
        if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
            pname = NULL;
        else 
            pname = ASN1_tag2str(utype);
        }
    else
        {
        if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
            pname = ASN1_tag2str(utype);
        else 
            pname = NULL;
        }

    if (utype == V_ASN1_NULL)
        {
        if (BIO_puts(out, "NULL\n") <= 0)
            return 0;
        return 1;
        }

    if (pname)
        {
        if (BIO_puts(out, pname) <= 0)
            return 0;
        if (BIO_puts(out, ":") <= 0)
            return 0;
        }

    switch (utype)
        {
        case V_ASN1_BOOLEAN:
            {
            int boolval = *(int *)fld;
            if (boolval == -1)
                boolval = it->size;
            ret = asn1_print_boolean_ctx(out, boolval, pctx);
            }
        break;

        case V_ASN1_INTEGER:
        case V_ASN1_ENUMERATED:
        ret = asn1_print_integer_ctx(out, str, pctx);
        break;

        case V_ASN1_UTCTIME:
        ret = ASN1_UTCTIME_print(out, str);
        break;

        case V_ASN1_GENERALIZEDTIME:
        ret = ASN1_GENERALIZEDTIME_print(out, str);
        break;

        case V_ASN1_OBJECT:
        ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
        break;

        case V_ASN1_OCTET_STRING:
        case V_ASN1_BIT_STRING:
        ret = asn1_print_obstring_ctx(out, str, indent, pctx);
        needlf = 0;
        break;

        case V_ASN1_SEQUENCE:
        case V_ASN1_SET:
        case V_ASN1_OTHER:
        if (BIO_puts(out, "\n") <= 0)
            return 0;
        if (ASN1_parse_dump(out, str->data, str->length,
                        indent, 0) <= 0)
            ret = 0;
        needlf = 0;
        break;

        default:
        ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);

        }
    if (!ret)
        return 0;
    if (needlf && BIO_puts(out, "\n") <= 0)
        return 0;
    return 1;
    }