<commit_before>/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include "internal/numbers.h"
#include <limits.h>
#include <openssl/asn1.h>
#include <openssl/bn.h>
#include "asn1_locl.h"

ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x)
{
    return ASN1_STRING_dup(x);
}

int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
{
    int neg, ret;
    /* Compare signs */
    neg = x->type & V_ASN1_NEG;
    if (neg != (y->type & V_ASN1_NEG)) {
        if (neg)
            return -1;
        else
            return 1;
    }

    ret = ASN1_STRING_cmp(x, y);

    if (neg)
        return -ret;
    else
        return ret;
}

/*-
 * This converts a big endian buffer and sign into its content encoding.
 * This is used for INTEGER and ENUMERATED types.
 * The internal representation is an ASN1_STRING whose data is a big endian
 * representation of the value, ignoring the sign. The sign is determined by
 * the type: if type & V_ASN1_NEG is true it is negative, otherwise positive.
 *
 * Positive integers are no problem: they are almost the same as the DER
 * encoding, except if the first byte is >= 0x80 we need to add a zero pad.
 *
 * Negative integers are a bit trickier...
 * The DER representation of negative integers is in 2s complement form.
 * The internal form is converted by complementing each octet and finally
 * adding one to the result. This can be done less messily with a little trick.
 * If the internal form has trailing zeroes then they will become FF by the
 * complement and 0 by the add one (due to carry) so just copy as many trailing
 * zeros to the destination as there are in the source. The carry will add one
 * to the last none zero octet: so complement this octet and add one and finally
 * complement any left over until you get to the start of the string.
 *
 * Padding is a little trickier too. If the first bytes is > 0x80 then we pad
 * with 0xff. However if the first byte is 0x80 and one of the following bytes
 * is non-zero we pad with 0xff. The reason for this distinction is that 0x80
 * followed by optional zeros isn't padded.
 */

static size_t i2c_ibuf(const unsigned char *b, size_t blen, int neg,
                       unsigned char **pp)
{
    int pad = 0;
    size_t ret, i;
    unsigned char *p, pb = 0;
    const unsigned char *n;

    if (b == NULL || blen == 0)
        ret = 1;
    else {
        ret = blen;
        i = b[0];
        if (ret == 1 && i == 0)
            neg = 0;
        if (!neg && (i > 127)) {
            pad = 1;
            pb = 0;
        } else if (neg) {
            if (i > 128) {
                pad = 1;
                pb = 0xFF;
            } else if (i == 128) {
                /*
                 * Special case: if any other bytes non zero we pad:
                 * otherwise we don't.
                 */
                for (i = 1; i < blen; i++)
                    if (b[i]) {
                        pad = 1;
                        pb = 0xFF;
                        break;
                    }
            }
        }
        ret += pad;
    }
    if (pp == NULL)
        return ret;
    p = *pp;

    if (pad)
        *(p++) = pb;
    if (b == NULL || blen == 0)
        *p = 0;
    else if (!neg)
        memcpy(p, b, blen);
    else {
        /* Begin at the end of the encoding */
        n = b + blen;
        p += blen;
        i = blen;
        /* Copy zeros to destination as long as source is zero */
        while (!n[-1] && i > 1) {
            *(--p) = 0;
            n--;
            i--;
        }
        /* Complement and increment next octet */
        *(--p) = ((*(--n)) ^ 0xff) + 1;
        i--;
        /* Complement any octets left */
        for (; i > 0; i--)
            *(--p) = *(--n) ^ 0xff;
    }

    *pp += ret;
    return ret;
}

/*
 * convert content octets into a big endian buffer. Returns the length
 * of buffer or 0 on error: for malformed INTEGER. If output buffer is
 * NULL just return length.
 */

static size_t c2i_ibuf(unsigned char *b, int *pneg,
                       const unsigned char *p, size_t plen)
{
    size_t i;
    int neg, pad;
    /* Zero content length is illegal */
    if (plen == 0) {
        ASN1err(ASN1_F_C2I_IBUF, ASN1_R_ILLEGAL_ZERO_CONTENT);
        return 0;
    }
    neg = p[0] & 0x80;
    if (pneg)
        *pneg = neg;
    /* Handle common case where length is 1 octet separately */
    if (plen == 1) {
        if (b) {
            if (neg)
                b[0] = (p[0] ^ 0xFF) + 1;
            else
                b[0] = p[0];
        }
        return 1;
    }
    if (p[0] == 0 || p[0] == 0xFF)
        pad = 1;
    else
        pad = 0;
    /* reject illegal padding: first two octets MSB can't match */
    if (pad && (neg == (p[1] & 0x80))) {
        ASN1err(ASN1_F_C2I_IBUF, ASN1_R_ILLEGAL_PADDING);
        return 0;
    }
    /* If positive just copy across */
    if (neg == 0) {
        if (b)
            memcpy(b, p + pad, plen - pad);
        return plen - pad;
    }

    if (neg && pad) {
        /* check is any following octets are non zero */
        for (i = 1; i < plen; i++) {
            if (p[i] != 0)
                break;
        }
        /* if all bytes are zero handle as special case */
        if (i == plen) {
            if (b) {
                b[0] = 1;
                memset(b + 1, 0, plen - 1);
            }
            return plen;
        }
    }

    plen -= pad;
    /* Must be negative: calculate twos complement */
    if (b) {
        const unsigned char *from = p + plen - 1 + pad;
        unsigned char *to = b + plen;
        i = plen;
        while (*from == 0 && i) {
            *--to = 0;
            i--;
            from--;
        }
        *--to = (*from-- ^ 0xff) + 1;
        OPENSSL_assert(i != 0);
        i--;
        for (; i > 0; i--)
            *--to = *from-- ^ 0xff;
    }
    return plen;
}

int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
{
    return i2c_ibuf(a->data, a->length, a->type & V_ASN1_NEG, pp);
}

/* Convert big endian buffer into uint64_t, return 0 on error */
static int asn1_get_uint64(uint64_t *pr, const unsigned char *b, size_t blen)
{
    size_t i;
    if (blen > sizeof(*pr)) {
        ASN1err(ASN1_F_ASN1_GET_UINT64, ASN1_R_TOO_LARGE);
        return 0;
    }
    *pr = 0;
    if (b == NULL)
        return 0;
    for (i = 0; i < blen; i++) {
        *pr <<= 8;
        *pr |= b[i];
    }
    return 1;
}

static size_t asn1_put_uint64(unsigned char *b, uint64_t r)
{
    if (r >= 0x100) {
        unsigned char *p;
        uint64_t rtmp = r;
        size_t i = 0;

        /* Work out how many bytes we need */
        while (rtmp) {
            rtmp >>= 8;
            i++;
        }

        /* Copy from end to beginning */
        p = b + i - 1;

        do {
            *p-- = r & 0xFF;
            r >>= 8;
        } while (p >= b);

        return i;
    }

    b[0] = (unsigned char)r;
    return 1;

}

/*
 * Absolute value of INT64_MIN: we can't just use -INT64_MIN as it produces
 * overflow warnings.
 */

#define ABS_INT64_MIN \
    ((uint64_t)INT64_MAX + (uint64_t)(-(INT64_MIN + INT64_MAX)))

/* signed version of asn1_get_uint64 */
static int asn1_get_int64(int64_t *pr, const unsigned char *b, size_t blen,
                          int neg)
{
    uint64_t r;
    if (asn1_get_uint64(&r, b, blen) == 0)
        return 0;
    if (neg) {
        if (r > ABS_INT64_MIN) {
            ASN1err(ASN1_F_ASN1_GET_INT64, ASN1_R_TOO_SMALL);
            return 0;
        }
        *pr = -(int64_t)r;
    } else {
        if (r > INT64_MAX) {
            ASN1err(ASN1_F_ASN1_GET_INT64, ASN1_R_TOO_LARGE);
            return 0;<commit_msg>Cast to an unsigned type before negating<commit_after>/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include "internal/numbers.h"
#include <limits.h>
#include <openssl/asn1.h>
#include <openssl/bn.h>
#include "asn1_locl.h"

ASN1_INTEGER *ASN1_INTEGER_dup(const ASN1_INTEGER *x)
{
    return ASN1_STRING_dup(x);
}

int ASN1_INTEGER_cmp(const ASN1_INTEGER *x, const ASN1_INTEGER *y)
{
    int neg, ret;
    /* Compare signs */
    neg = x->type & V_ASN1_NEG;
    if (neg != (y->type & V_ASN1_NEG)) {
        if (neg)
            return -1;
        else
            return 1;
    }

    ret = ASN1_STRING_cmp(x, y);

    if (neg)
        return -ret;
    else
        return ret;
}

/*-
 * This converts a big endian buffer and sign into its content encoding.
 * This is used for INTEGER and ENUMERATED types.
 * The internal representation is an ASN1_STRING whose data is a big endian
 * representation of the value, ignoring the sign. The sign is determined by
 * the type: if type & V_ASN1_NEG is true it is negative, otherwise positive.
 *
 * Positive integers are no problem: they are almost the same as the DER
 * encoding, except if the first byte is >= 0x80 we need to add a zero pad.
 *
 * Negative integers are a bit trickier...
 * The DER representation of negative integers is in 2s complement form.
 * The internal form is converted by complementing each octet and finally
 * adding one to the result. This can be done less messily with a little trick.
 * If the internal form has trailing zeroes then they will become FF by the
 * complement and 0 by the add one (due to carry) so just copy as many trailing
 * zeros to the destination as there are in the source. The carry will add one
 * to the last none zero octet: so complement this octet and add one and finally
 * complement any left over until you get to the start of the string.
 *
 * Padding is a little trickier too. If the first bytes is > 0x80 then we pad
 * with 0xff. However if the first byte is 0x80 and one of the following bytes
 * is non-zero we pad with 0xff. The reason for this distinction is that 0x80
 * followed by optional zeros isn't padded.
 */

static size_t i2c_ibuf(const unsigned char *b, size_t blen, int neg,
                       unsigned char **pp)
{
    int pad = 0;
    size_t ret, i;
    unsigned char *p, pb = 0;
    const unsigned char *n;

    if (b == NULL || blen == 0)
        ret = 1;
    else {
        ret = blen;
        i = b[0];
        if (ret == 1 && i == 0)
            neg = 0;
        if (!neg && (i > 127)) {
            pad = 1;
            pb = 0;
        } else if (neg) {
            if (i > 128) {
                pad = 1;
                pb = 0xFF;
            } else if (i == 128) {
                /*
                 * Special case: if any other bytes non zero we pad:
                 * otherwise we don't.
                 */
                for (i = 1; i < blen; i++)
                    if (b[i]) {
                        pad = 1;
                        pb = 0xFF;
                        break;
                    }
            }
        }
        ret += pad;
    }
    if (pp == NULL)
        return ret;
    p = *pp;

    if (pad)
        *(p++) = pb;
    if (b == NULL || blen == 0)
        *p = 0;
    else if (!neg)
        memcpy(p, b, blen);
    else {
        /* Begin at the end of the encoding */
        n = b + blen;
        p += blen;
        i = blen;
        /* Copy zeros to destination as long as source is zero */
        while (!n[-1] && i > 1) {
            *(--p) = 0;
            n--;
            i--;
        }
        /* Complement and increment next octet */
        *(--p) = ((*(--n)) ^ 0xff) + 1;
        i--;
        /* Complement any octets left */
        for (; i > 0; i--)
            *(--p) = *(--n) ^ 0xff;
    }

    *pp += ret;
    return ret;
}

/*
 * convert content octets into a big endian buffer. Returns the length
 * of buffer or 0 on error: for malformed INTEGER. If output buffer is
 * NULL just return length.
 */

static size_t c2i_ibuf(unsigned char *b, int *pneg,
                       const unsigned char *p, size_t plen)
{
    size_t i;
    int neg, pad;
    /* Zero content length is illegal */
    if (plen == 0) {
        ASN1err(ASN1_F_C2I_IBUF, ASN1_R_ILLEGAL_ZERO_CONTENT);
        return 0;
    }
    neg = p[0] & 0x80;
    if (pneg)
        *pneg = neg;
    /* Handle common case where length is 1 octet separately */
    if (plen == 1) {
        if (b) {
            if (neg)
                b[0] = (p[0] ^ 0xFF) + 1;
            else
                b[0] = p[0];
        }
        return 1;
    }
    if (p[0] == 0 || p[0] == 0xFF)
        pad = 1;
    else
        pad = 0;
    /* reject illegal padding: first two octets MSB can't match */
    if (pad && (neg == (p[1] & 0x80))) {
        ASN1err(ASN1_F_C2I_IBUF, ASN1_R_ILLEGAL_PADDING);
        return 0;
    }
    /* If positive just copy across */
    if (neg == 0) {
        if (b)
            memcpy(b, p + pad, plen - pad);
        return plen - pad;
    }

    if (neg && pad) {
        /* check is any following octets are non zero */
        for (i = 1; i < plen; i++) {
            if (p[i] != 0)
                break;
        }
        /* if all bytes are zero handle as special case */
        if (i == plen) {
            if (b) {
                b[0] = 1;
                memset(b + 1, 0, plen - 1);
            }
            return plen;
        }
    }

    plen -= pad;
    /* Must be negative: calculate twos complement */
    if (b) {
        const unsigned char *from = p + plen - 1 + pad;
        unsigned char *to = b + plen;
        i = plen;
        while (*from == 0 && i) {
            *--to = 0;
            i--;
            from--;
        }
        *--to = (*from-- ^ 0xff) + 1;
        OPENSSL_assert(i != 0);
        i--;
        for (; i > 0; i--)
            *--to = *from-- ^ 0xff;
    }
    return plen;
}

int i2c_ASN1_INTEGER(ASN1_INTEGER *a, unsigned char **pp)
{
    return i2c_ibuf(a->data, a->length, a->type & V_ASN1_NEG, pp);
}

/* Convert big endian buffer into uint64_t, return 0 on error */
static int asn1_get_uint64(uint64_t *pr, const unsigned char *b, size_t blen)
{
    size_t i;
    if (blen > sizeof(*pr)) {
        ASN1err(ASN1_F_ASN1_GET_UINT64, ASN1_R_TOO_LARGE);
        return 0;
    }
    *pr = 0;
    if (b == NULL)
        return 0;
    for (i = 0; i < blen; i++) {
        *pr <<= 8;
        *pr |= b[i];
    }
    return 1;
}

static size_t asn1_put_uint64(unsigned char *b, uint64_t r)
{
    if (r >= 0x100) {
        unsigned char *p;
        uint64_t rtmp = r;
        size_t i = 0;

        /* Work out how many bytes we need */
        while (rtmp) {
            rtmp >>= 8;
            i++;
        }

        /* Copy from end to beginning */
        p = b + i - 1;

        do {
            *p-- = r & 0xFF;
            r >>= 8;
        } while (p >= b);

        return i;
    }

    b[0] = (unsigned char)r;
    return 1;

}

/*
 * Absolute value of INT64_MIN: we can't just use -INT64_MIN as it produces
 * overflow warnings.
 */

#define ABS_INT64_MIN \
    ((uint64_t)INT64_MAX + (uint64_t)(-(INT64_MIN + INT64_MAX)))

/* signed version of asn1_get_uint64 */
static int asn1_get_int64(int64_t *pr, const unsigned char *b, size_t blen,
                          int neg)
{
    uint64_t r;
    if (asn1_get_uint64(&r, b, blen) == 0)
        return 0;
    if (neg) {
        if (r > ABS_INT64_MIN) {
            ASN1err(ASN1_F_ASN1_GET_INT64, ASN1_R_TOO_SMALL);
            return 0;
        }
        *pr = -(uint64_t)r;
    } else {
        if (r > INT64_MAX) {
            ASN1err(ASN1_F_ASN1_GET_INT64, ASN1_R_TOO_LARGE);
            return 0;
{'fraction_non_alphanumeric': 0.11505752876438219, 'fraction_numerical': 0.02751375687843922, 'mean_word_length': 1.6128083646462996, 'pattern_counts': {'":': 0, '<': 21, '<?xml version=': 0, '>': 53, 'https://': 2, 'lorem ipsum': 0, 'www.': 2, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '467050', 'n_tokens_mistral': 5758, 'n_tokens_neox': 5392, 'n_words': 1881}