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fips_utl.h

/* ====================================================================
 * Copyright (c) 2007 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.
 *
 */

void do_print_errors(void);
int hex2bin(const char *in, unsigned char *out);
unsigned char *hex2bin_m(const char *in, long *plen);
int do_hex2bn(BIGNUM **pr, const char *in);
int do_bn_print(FILE *out, BIGNUM *bn);
int do_bn_print_name(FILE *out, const char *name, BIGNUM *bn);
int parse_line(char **pkw, char **pval, char *linebuf, char *olinebuf);
BIGNUM *hex2bn(const char *in);
int bin2hex(const unsigned char *in,int len,char *out);
void pv(const char *tag,const unsigned char *val,int len);
int tidy_line(char *linebuf, char *olinebuf);
int bint2bin(const char *in, int len, unsigned char *out);
int bin2bint(const unsigned char *in,int len,char *out);
void PrintValue(char *tag, unsigned char *val, int len);
void OutputValue(char *tag, unsigned char *val, int len, FILE *rfp,int bitmode);

void do_print_errors(void)
      {
      const char *file, *data;
      int line, flags;
      unsigned long l;
      while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)))
            {
            fprintf(stderr, "ERROR:%lx:lib=%d,func=%d,reason=%d"
                        ":file=%s:line=%d:%s\n",
                  l, ERR_GET_LIB(l), ERR_GET_FUNC(l), ERR_GET_REASON(l),
                  file, line, flags & ERR_TXT_STRING ? data : "");
            }
      }

int hex2bin(const char *in, unsigned char *out)
    {
    int n1, n2;
    unsigned char ch;

    for (n1=0,n2=0 ; in[n1] && in[n1] != '\n' ; )
      { /* first byte */
      if ((in[n1] >= '0') && (in[n1] <= '9'))
          ch = in[n1++] - '0';
      else if ((in[n1] >= 'A') && (in[n1] <= 'F'))
          ch = in[n1++] - 'A' + 10;
      else if ((in[n1] >= 'a') && (in[n1] <= 'f'))
          ch = in[n1++] - 'a' + 10;
      else
          return -1;
      if(!in[n1])
          {
          out[n2++]=ch;
          break;
          }
      out[n2] = ch << 4;
      /* second byte */
      if ((in[n1] >= '0') && (in[n1] <= '9'))
          ch = in[n1++] - '0';
      else if ((in[n1] >= 'A') && (in[n1] <= 'F'))
          ch = in[n1++] - 'A' + 10;
      else if ((in[n1] >= 'a') && (in[n1] <= 'f'))
          ch = in[n1++] - 'a' + 10;
      else
          return -1;
      out[n2++] |= ch;
      }
    return n2;
    }

unsigned char *hex2bin_m(const char *in, long *plen)
      {
      unsigned char *p;
      p = OPENSSL_malloc((strlen(in) + 1)/2);
      *plen = hex2bin(in, p);
      return p;
      }

int do_hex2bn(BIGNUM **pr, const char *in)
      {
      unsigned char *p;
      long plen;
      int r = 0;
      p = hex2bin_m(in, &plen);
      if (!p)
            return 0;
      if (!*pr)
            *pr = BN_new();
      if (!*pr)
            return 0;
      if (BN_bin2bn(p, plen, *pr))
            r = 1;
      OPENSSL_free(p);
      return r;
      }

int do_bn_print(FILE *out, BIGNUM *bn)
      {
      int len, i;
      unsigned char *tmp;
      len = BN_num_bytes(bn);
      if (len == 0)
            {
            fputs("00", out);
            return 1;
            }

      tmp = OPENSSL_malloc(len);
      if (!tmp)
            {
            fprintf(stderr, "Memory allocation error\n");
            return 0;
            }
      BN_bn2bin(bn, tmp);
      for (i = 0; i < len; i++)
            fprintf(out, "%02x", tmp[i]);
      OPENSSL_free(tmp);
      return 1;
      }

int do_bn_print_name(FILE *out, const char *name, BIGNUM *bn)
      {
      int r;
      fprintf(out, "%s = ", name);
      r = do_bn_print(out, bn);
      if (!r)
            return 0;
      fputs("\n", out);
      return 1;
      }

int parse_line(char **pkw, char **pval, char *linebuf, char *olinebuf)
      {
      char *keyword, *value, *p, *q;
      strcpy(linebuf, olinebuf);
      keyword = linebuf;
      /* Skip leading space */
      while (isspace((unsigned char)*keyword))
            keyword++;

      /* Look for = sign */
      p = strchr(linebuf, '=');

      /* If no '=' exit */
      if (!p)
            return 0;

      q = p - 1;

      /* Remove trailing space */
      while (isspace((unsigned char)*q))
            *q-- = 0;

      *p = 0;
      value = p + 1;

      /* Remove leading space from value */
      while (isspace((unsigned char)*value))
            value++;

      /* Remove trailing space from value */
      p = value + strlen(value) - 1;

      while (*p == '\n' || isspace((unsigned char)*p))
            *p-- = 0;

      *pkw = keyword;
      *pval = value;
      return 1;
      }

BIGNUM *hex2bn(const char *in)
    {
    BIGNUM *p=NULL;

    if (!do_hex2bn(&p, in))
      return NULL;

    return p;
    }

int bin2hex(const unsigned char *in,int len,char *out)
    {
    int n1, n2;
    unsigned char ch;

    for (n1=0,n2=0 ; n1 < len ; ++n1)
      {
      ch=in[n1] >> 4;
      if (ch <= 0x09)
          out[n2++]=ch+'0';
      else
          out[n2++]=ch-10+'a';
      ch=in[n1] & 0x0f;
      if(ch <= 0x09)
          out[n2++]=ch+'0';
      else
          out[n2++]=ch-10+'a';
      }
    out[n2]='\0';
    return n2;
    }

void pv(const char *tag,const unsigned char *val,int len)
    {
    char obuf[2048];

    bin2hex(val,len,obuf);
    printf("%s = %s\n",tag,obuf);
    }

/* To avoid extensive changes to test program at this stage just convert
 * the input line into an acceptable form. Keyword lines converted to form
 * "keyword = value\n" no matter what white space present, all other lines
 * just have leading and trailing space removed.
 */

int tidy_line(char *linebuf, char *olinebuf)
      {
      char *keyword, *value, *p, *q;
      strcpy(linebuf, olinebuf);
      keyword = linebuf;
      /* Skip leading space */
      while (isspace((unsigned char)*keyword))
            keyword++;
      /* Look for = sign */
      p = strchr(linebuf, '=');

      /* If no '=' just chop leading, trailing ws */
      if (!p)
            {
            p = keyword + strlen(keyword) - 1;
            while (*p == '\n' || isspace((unsigned char)*p))
                  *p-- = 0;
            strcpy(olinebuf, keyword);
            strcat(olinebuf, "\n");
            return 1;
            }

      q = p - 1;

      /* Remove trailing space */
      while (isspace((unsigned char)*q))
            *q-- = 0;

      *p = 0;
      value = p + 1;

      /* Remove leading space from value */
      while (isspace((unsigned char)*value))
            value++;

      /* Remove trailing space from value */
      p = value + strlen(value) - 1;

      while (*p == '\n' || isspace((unsigned char)*p))
            *p-- = 0;

      strcpy(olinebuf, keyword);
      strcat(olinebuf, " = ");
      strcat(olinebuf, value);
      strcat(olinebuf, "\n");

      return 1;
      }

/* NB: this return the number of _bits_ read */
int bint2bin(const char *in, int len, unsigned char *out)
    {
    int n;

    memset(out,0,len);
    for(n=0 ; n < len ; ++n)
      if(in[n] == '1')
          out[n/8]|=(0x80 >> (n%8));
    return len;
    }

int bin2bint(const unsigned char *in,int len,char *out)
    {
    int n;

    for(n=0 ; n < len ; ++n)
      out[n]=(in[n/8]&(0x80 >> (n%8))) ? '1' : '0';
    return n;
    }

/*-----------------------------------------------*/

void PrintValue(char *tag, unsigned char *val, int len)
{
#if VERBOSE
  char obuf[2048];
  int olen;
  olen = bin2hex(val, len, obuf);
  printf("%s = %.*s\n", tag, olen, obuf);
#endif
}

void OutputValue(char *tag, unsigned char *val, int len, FILE *rfp,int bitmode)
    {
    char obuf[2048];
    int olen;

    if(bitmode)
      olen=bin2bint(val,len,obuf);
    else
      olen=bin2hex(val,len,obuf);

    fprintf(rfp, "%s = %.*s\n", tag, olen, obuf);
#if VERBOSE
    printf("%s = %.*s\n", tag, olen, obuf);
#endif
    }


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