Commit 6c5b6cb0 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

ASN1 INTEGER refactor.



Rewrite and tidy ASN1_INTEGER and ASN1_ENUMERATED handling.

Remove code duplication.

New functions to convert between int64_t and ASN.1 types without the
quirks of the old long conversion functions.

Add documentation.

Reviewed-by: default avatarRich Salz <rsalz@openssl.org>
parent 978327bc
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+4 −20
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ GENERAL=Makefile README
LIB=$(TOP)/libcrypto.a
LIBSRC=	a_object.c a_bitstr.c a_utctm.c a_gentm.c a_time.c a_int.c a_octet.c \
	a_print.c a_type.c a_dup.c a_d2i_fp.c a_i2d_fp.c \
	a_enum.c a_utf8.c a_sign.c a_digest.c a_verify.c a_mbstr.c a_strex.c \
	a_utf8.c a_sign.c a_digest.c a_verify.c a_mbstr.c a_strex.c \
	x_algor.c x_val.c x_pubkey.c x_sig.c x_req.c x_bignum.c \
	x_long.c x_x509.c x_x509a.c x_crl.c x_info.c x_spki.c nsseq.c \
	x_nx509.c d2i_pu.c d2i_pr.c i2d_pu.c i2d_pr.c\
@@ -25,13 +25,13 @@ LIBSRC= a_object.c a_bitstr.c a_utctm.c a_gentm.c a_time.c a_int.c a_octet.c \
	tasn_new.c tasn_fre.c tasn_enc.c tasn_dec.c tasn_utl.c tasn_typ.c \
	tasn_prn.c tasn_scn.c ameth_lib.c \
	f_int.c f_string.c n_pkey.c \
	f_enum.c x_pkey.c bio_asn1.c bio_ndef.c asn_mime.c \
	x_pkey.c bio_asn1.c bio_ndef.c asn_mime.c \
	asn1_gen.c asn1_par.c asn1_lib.c asn1_err.c a_strnid.c \
	evp_asn1.c asn_pack.c p5_pbe.c p5_pbev2.c p8_pkey.c asn_moid.c \
	asn_mstbl.c
LIBOBJ= a_object.o a_bitstr.o a_utctm.o a_gentm.o a_time.o a_int.o a_octet.o \
	a_print.o a_type.o a_dup.o a_d2i_fp.o a_i2d_fp.o \
	a_enum.o a_utf8.o a_sign.o a_digest.o a_verify.o a_mbstr.o a_strex.o \
	a_utf8.o a_sign.o a_digest.o a_verify.o a_mbstr.o a_strex.o \
	x_algor.o x_val.o x_pubkey.o x_sig.o x_req.o x_bignum.o \
	x_long.o x_x509.o x_x509a.o x_crl.o x_info.o x_spki.o nsseq.o \
	x_nx509.o d2i_pu.o d2i_pr.o i2d_pu.o i2d_pr.o \
@@ -39,7 +39,7 @@ LIBOBJ= a_object.o a_bitstr.o a_utctm.o a_gentm.o a_time.o a_int.o a_octet.o \
	tasn_new.o tasn_fre.o tasn_enc.o tasn_dec.o tasn_utl.o tasn_typ.o \
	tasn_prn.o tasn_scn.o ameth_lib.o \
	f_int.o f_string.o n_pkey.o \
	f_enum.o x_pkey.o bio_asn1.o bio_ndef.o asn_mime.o \
	x_pkey.o bio_asn1.o bio_ndef.o asn_mime.o \
	asn1_gen.o asn1_par.o asn1_lib.o asn1_err.o a_strnid.o \
	evp_asn1.o asn_pack.o p5_pbe.o p5_pbev2.o p8_pkey.o asn_moid.o \
	asn_mstbl.o
@@ -133,14 +133,6 @@ a_dup.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
a_dup.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
a_dup.o: ../../include/openssl/symhacks.h ../include/internal/cryptlib.h
a_dup.o: a_dup.c
a_enum.o: ../../e_os.h ../../include/openssl/asn1.h ../../include/openssl/bio.h
a_enum.o: ../../include/openssl/bn.h ../../include/openssl/buffer.h
a_enum.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h
a_enum.o: ../../include/openssl/err.h ../../include/openssl/lhash.h
a_enum.o: ../../include/openssl/opensslconf.h ../../include/openssl/opensslv.h
a_enum.o: ../../include/openssl/ossl_typ.h ../../include/openssl/safestack.h
a_enum.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
a_enum.o: ../include/internal/cryptlib.h a_enum.c
a_gentm.o: ../../e_os.h ../../include/openssl/asn1.h
a_gentm.o: ../../include/openssl/bio.h ../../include/openssl/buffer.h
a_gentm.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h
@@ -441,14 +433,6 @@ evp_asn1.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
evp_asn1.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
evp_asn1.o: ../../include/openssl/symhacks.h ../include/internal/cryptlib.h
evp_asn1.o: evp_asn1.c
f_enum.o: ../../e_os.h ../../include/openssl/asn1.h ../../include/openssl/bio.h
f_enum.o: ../../include/openssl/buffer.h ../../include/openssl/crypto.h
f_enum.o: ../../include/openssl/e_os2.h ../../include/openssl/err.h
f_enum.o: ../../include/openssl/lhash.h ../../include/openssl/opensslconf.h
f_enum.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
f_enum.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
f_enum.o: ../../include/openssl/symhacks.h ../include/internal/cryptlib.h
f_enum.o: f_enum.c
f_int.o: ../../e_os.h ../../include/openssl/asn1.h ../../include/openssl/bio.h
f_int.o: ../../include/openssl/buffer.h ../../include/openssl/crypto.h
f_int.o: ../../include/openssl/e_os2.h ../../include/openssl/err.h

crypto/asn1/a_enum.c

deleted100644 → 0
+0 −179
Original line number Diff line number Diff line
/* crypto/asn1/a_enum.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.]
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/bn.h>

/*
 * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
 * for comments on encoding see a_int.c
 */

int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
{
    int j, k;
    unsigned int i;
    unsigned char buf[sizeof(long) + 1];
    long d;

    a->type = V_ASN1_ENUMERATED;
    if (a->length < (int)(sizeof(long) + 1)) {
        OPENSSL_free(a->data);
        if ((a->data = OPENSSL_malloc(sizeof(long) + 1)) != NULL)
            memset(a->data, 0, sizeof(long) + 1);
    }
    if (a->data == NULL) {
        ASN1err(ASN1_F_ASN1_ENUMERATED_SET, ERR_R_MALLOC_FAILURE);
        return (0);
    }
    d = v;
    if (d < 0) {
        d = -d;
        a->type = V_ASN1_NEG_ENUMERATED;
    }

    for (i = 0; i < sizeof(long); i++) {
        if (d == 0)
            break;
        buf[i] = (int)d & 0xff;
        d >>= 8;
    }
    j = 0;
    for (k = i - 1; k >= 0; k--)
        a->data[j++] = buf[k];
    a->length = j;
    return (1);
}

long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
{
    int neg = 0, i;
    long r = 0;

    if (a == NULL)
        return (0L);
    i = a->type;
    if (i == V_ASN1_NEG_ENUMERATED)
        neg = 1;
    else if (i != V_ASN1_ENUMERATED)
        return -1;

    if (a->length > (int)sizeof(long)) {
        /* hmm... a bit ugly */
        return (0xffffffffL);
    }
    if (a->data == NULL)
        return 0;

    for (i = 0; i < a->length; i++) {
        r <<= 8;
        r |= (unsigned char)a->data[i];
    }
    if (neg)
        r = -r;
    return (r);
}

ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
{
    ASN1_ENUMERATED *ret;
    int len, j;

    if (ai == NULL)
        ret = ASN1_ENUMERATED_new();
    else
        ret = ai;
    if (ret == NULL) {
        ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_NESTED_ASN1_ERROR);
        goto err;
    }
    if (BN_is_negative(bn))
        ret->type = V_ASN1_NEG_ENUMERATED;
    else
        ret->type = V_ASN1_ENUMERATED;
    j = BN_num_bits(bn);
    len = ((j == 0) ? 0 : ((j / 8) + 1));
    if (ret->length < len + 4) {
        unsigned char *new_data = OPENSSL_realloc(ret->data, len + 4);
        if (!new_data) {
            ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ret->data = new_data;
    }

    ret->length = BN_bn2bin(bn, ret->data);
    return (ret);
 err:
    if (ret != ai)
        ASN1_ENUMERATED_free(ret);
    return (NULL);
}

BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
{
    BIGNUM *ret;

    if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL)
        ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN, ASN1_R_BN_LIB);
    else if (ai->type == V_ASN1_NEG_ENUMERATED)
        BN_set_negative(ret, 1);
    return (ret);
}
+359 −181

File changed.

Preview size limit exceeded, changes collapsed.

+13 −2
Original line number Diff line number Diff line
/* crypto/asn1/asn1_err.c */
/* ====================================================================
 * Copyright (c) 1999-2014 The OpenSSL Project.  All rights reserved.
 * Copyright (c) 1999-2015 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
@@ -93,7 +93,9 @@ static ERR_STRING_DATA ASN1_str_functs[] = {
    {ERR_FUNC(ASN1_F_ASN1_GENERALIZEDTIME_ADJ), "ASN1_GENERALIZEDTIME_adj"},
    {ERR_FUNC(ASN1_F_ASN1_GENERALIZEDTIME_SET), "ASN1_GENERALIZEDTIME_set"},
    {ERR_FUNC(ASN1_F_ASN1_GENERATE_V3), "ASN1_generate_v3"},
    {ERR_FUNC(ASN1_F_ASN1_GET_INT64), "ASN1_GET_INT64"},
    {ERR_FUNC(ASN1_F_ASN1_GET_OBJECT), "ASN1_get_object"},
    {ERR_FUNC(ASN1_F_ASN1_GET_UINT64), "ASN1_GET_UINT64"},
    {ERR_FUNC(ASN1_F_ASN1_HEADER_NEW), "ASN1_HEADER_NEW"},
    {ERR_FUNC(ASN1_F_ASN1_I2D_BIO), "ASN1_i2d_bio"},
    {ERR_FUNC(ASN1_F_ASN1_I2D_FP), "ASN1_i2d_fp"},
@@ -101,8 +103,8 @@ static ERR_STRING_DATA ASN1_str_functs[] = {
    {ERR_FUNC(ASN1_F_ASN1_INTEGER_TO_BN), "ASN1_INTEGER_to_BN"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_D2I_FP), "ASN1_item_d2i_fp"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_DUP), "ASN1_item_dup"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_EX_NEW), "ASN1_ITEM_EX_NEW"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_EX_D2I), "ASN1_ITEM_EX_D2I"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_EX_NEW), "ASN1_ITEM_EX_NEW"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_I2D_BIO), "ASN1_item_i2d_bio"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_I2D_FP), "ASN1_item_i2d_fp"},
    {ERR_FUNC(ASN1_F_ASN1_ITEM_PACK), "ASN1_item_pack"},
@@ -121,8 +123,10 @@ static ERR_STRING_DATA ASN1_str_functs[] = {
    {ERR_FUNC(ASN1_F_ASN1_SEQ_UNPACK), "ASN1_seq_unpack"},
    {ERR_FUNC(ASN1_F_ASN1_SIGN), "ASN1_sign"},
    {ERR_FUNC(ASN1_F_ASN1_STR2TYPE), "ASN1_STR2TYPE"},
    {ERR_FUNC(ASN1_F_ASN1_STRING_GET_INT64), "ASN1_STRING_GET_INT64"},
    {ERR_FUNC(ASN1_F_ASN1_STRING_SET), "ASN1_STRING_set"},
    {ERR_FUNC(ASN1_F_ASN1_STRING_TABLE_ADD), "ASN1_STRING_TABLE_add"},
    {ERR_FUNC(ASN1_F_ASN1_STRING_TO_BN), "ASN1_STRING_TO_BN"},
    {ERR_FUNC(ASN1_F_ASN1_STRING_TYPE_NEW), "ASN1_STRING_type_new"},
    {ERR_FUNC(ASN1_F_ASN1_TEMPLATE_EX_D2I), "ASN1_TEMPLATE_EX_D2I"},
    {ERR_FUNC(ASN1_F_ASN1_TEMPLATE_NEW), "ASN1_TEMPLATE_NEW"},
@@ -142,9 +146,11 @@ static ERR_STRING_DATA ASN1_str_functs[] = {
    {ERR_FUNC(ASN1_F_BITSTR_CB), "BITSTR_CB"},
    {ERR_FUNC(ASN1_F_BN_TO_ASN1_ENUMERATED), "BN_to_ASN1_ENUMERATED"},
    {ERR_FUNC(ASN1_F_BN_TO_ASN1_INTEGER), "BN_to_ASN1_INTEGER"},
    {ERR_FUNC(ASN1_F_BN_TO_ASN1_STRING), "BN_TO_ASN1_STRING"},
    {ERR_FUNC(ASN1_F_C2I_ASN1_BIT_STRING), "c2i_ASN1_BIT_STRING"},
    {ERR_FUNC(ASN1_F_C2I_ASN1_INTEGER), "c2i_ASN1_INTEGER"},
    {ERR_FUNC(ASN1_F_C2I_ASN1_OBJECT), "c2i_ASN1_OBJECT"},
    {ERR_FUNC(ASN1_F_C2I_IBUF), "C2I_IBUF"},
    {ERR_FUNC(ASN1_F_COLLECT_DATA), "COLLECT_DATA"},
    {ERR_FUNC(ASN1_F_D2I_ASN1_BIT_STRING), "D2I_ASN1_BIT_STRING"},
    {ERR_FUNC(ASN1_F_D2I_ASN1_BOOLEAN), "d2i_ASN1_BOOLEAN"},
@@ -252,8 +258,10 @@ static ERR_STRING_DATA ASN1_str_reasons[] = {
    {ERR_REASON(ASN1_R_ILLEGAL_OPTIONAL_ANY), "illegal optional any"},
    {ERR_REASON(ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE),
     "illegal options on item template"},
    {ERR_REASON(ASN1_R_ILLEGAL_PADDING), "illegal padding"},
    {ERR_REASON(ASN1_R_ILLEGAL_TAGGED_ANY), "illegal tagged any"},
    {ERR_REASON(ASN1_R_ILLEGAL_TIME_VALUE), "illegal time value"},
    {ERR_REASON(ASN1_R_ILLEGAL_ZERO_CONTENT), "illegal zero content"},
    {ERR_REASON(ASN1_R_INTEGER_NOT_ASCII_FORMAT), "integer not ascii format"},
    {ERR_REASON(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG),
     "integer too large for long"},
@@ -314,7 +322,9 @@ static ERR_STRING_DATA ASN1_str_reasons[] = {
    {ERR_REASON(ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD),
     "the asn1 object identifier is not known for this md"},
    {ERR_REASON(ASN1_R_TIME_NOT_ASCII_FORMAT), "time not ascii format"},
    {ERR_REASON(ASN1_R_TOO_LARGE), "too large"},
    {ERR_REASON(ASN1_R_TOO_LONG), "too long"},
    {ERR_REASON(ASN1_R_TOO_SMALL), "too small"},
    {ERR_REASON(ASN1_R_TYPE_NOT_CONSTRUCTED), "type not constructed"},
    {ERR_REASON(ASN1_R_TYPE_NOT_PRIMITIVE), "type not primitive"},
    {ERR_REASON(ASN1_R_UNABLE_TO_DECODE_RSA_KEY), "unable to decode rsa key"},
@@ -339,6 +349,7 @@ static ERR_STRING_DATA ASN1_str_reasons[] = {
    {ERR_REASON(ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE),
     "unsupported public key type"},
    {ERR_REASON(ASN1_R_UNSUPPORTED_TYPE), "unsupported type"},
    {ERR_REASON(ASN1_R_WRONG_INTEGER_TYPE), "wrong integer type"},
    {ERR_REASON(ASN1_R_WRONG_PUBLIC_KEY_TYPE), "wrong public key type"},
    {ERR_REASON(ASN1_R_WRONG_TAG), "wrong tag"},
    {ERR_REASON(ASN1_R_WRONG_TYPE), "wrong type"},

crypto/asn1/f_enum.c

deleted100644 → 0
+0 −193
Original line number Diff line number Diff line
/* crypto/asn1/f_enum.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.]
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1.h>

/* Based on a_int.c: equivalent ENUMERATED functions */

int i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a)
{
    int i, n = 0;
    static const char *h = "0123456789ABCDEF";
    char buf[2];

    if (a == NULL)
        return (0);

    if (a->length == 0) {
        if (BIO_write(bp, "00", 2) != 2)
            goto err;
        n = 2;
    } else {
        for (i = 0; i < a->length; i++) {
            if ((i != 0) && (i % 35 == 0)) {
                if (BIO_write(bp, "\\\n", 2) != 2)
                    goto err;
                n += 2;
            }
            buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
            buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
            if (BIO_write(bp, buf, 2) != 2)
                goto err;
            n += 2;
        }
    }
    return (n);
 err:
    return (-1);
}

int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size)
{
    int i, j, k, m, n, again, bufsize;
    unsigned char *s = NULL, *sp;
    unsigned char *bufp;
    int num = 0, slen = 0, first = 1;

    bs->type = V_ASN1_ENUMERATED;

    bufsize = BIO_gets(bp, buf, size);
    for (;;) {
        if (bufsize < 1)
            goto err;
        i = bufsize;
        if (buf[i - 1] == '\n')
            buf[--i] = '\0';
        if (i == 0)
            goto err;
        if (buf[i - 1] == '\r')
            buf[--i] = '\0';
        if (i == 0)
            goto err;
        again = (buf[i - 1] == '\\');

        for (j = 0; j < i; j++) {
            if (!(((buf[j] >= '0') && (buf[j] <= '9')) ||
                  ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
                  ((buf[j] >= 'A') && (buf[j] <= 'F')))) {
                i = j;
                break;
            }
        }
        buf[i] = '\0';
        /*
         * We have now cleared all the crap off the end of the line
         */
        if (i < 2)
            goto err;

        bufp = (unsigned char *)buf;
        if (first) {
            first = 0;
            if ((bufp[0] == '0') && (buf[1] == '0')) {
                bufp += 2;
                i -= 2;
            }
        }
        k = 0;
        i -= again;
        if (i % 2 != 0) {
            ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ASN1_R_ODD_NUMBER_OF_CHARS);
            return 0;
        }
        i /= 2;
        if (num + i > slen) {
            sp = OPENSSL_realloc(s, (unsigned int)num + i * 2);
            if (sp == NULL) {
                ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
                OPENSSL_free(s);
                return 0;
            }
            s = sp;
            slen = num + i * 2;
        }
        for (j = 0; j < i; j++, k += 2) {
            for (n = 0; n < 2; n++) {
                m = bufp[k + n];
                if ((m >= '0') && (m <= '9'))
                    m -= '0';
                else if ((m >= 'a') && (m <= 'f'))
                    m = m - 'a' + 10;
                else if ((m >= 'A') && (m <= 'F'))
                    m = m - 'A' + 10;
                else {
                    ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,
                            ASN1_R_NON_HEX_CHARACTERS);
                    return 0;
                }
                s[num + j] <<= 4;
                s[num + j] |= m;
            }
        }
        num += i;
        if (again)
            bufsize = BIO_gets(bp, buf, size);
        else
            break;
    }
    bs->length = num;
    bs->data = s;
    return 1;

 err:
    ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ASN1_R_SHORT_LINE);
    return 0;
}
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