encode.c

vc环境下的pgp源码

	if ( ber_put_len( ber, 0, 0 ) != 1 )
		return( -1 );

	return( taglen + 1 );
}

int
ber_put_boolean( BerElement *ber, int boolval, unsigned long tag )
{
	int		taglen;
	unsigned char	trueval = 0xff;
	unsigned char	falseval = 0x00;

	if ( tag == LBER_DEFAULT )
		tag = LBER_BOOLEAN;

	if ( (taglen = ber_put_tag( ber, tag, 0 )) == -1 )
		return( -1 );

	if ( ber_put_len( ber, 1, 0 ) != 1 )
		return( -1 );

	if ( ber_write( ber, (char *)(boolval ? &trueval : &falseval), 1, 0 )
	    != 1 )
		return( -1 );

	return( taglen + 2 );
}

#define FOUR_BYTE_LEN	5

static int
ber_start_seqorset( BerElement *ber, unsigned long tag )
{
	Seqorset	*newSEQ;

	if ( (newSEQ = (Seqorset *) calloc( sizeof(Seqorset), 1 ))
	    == NULLSEQORSET )
		return( -1 );
	newSEQ->sos_ber = ber;
	if ( ber->ber_sos == NULLSEQORSET )
		newSEQ->sos_first = ber->ber_ptr;
	else
		newSEQ->sos_first = ber->ber_sos->sos_ptr;

	/* Set aside room for a 4 byte length field */
	newSEQ->sos_ptr = newSEQ->sos_first + ber_calc_taglen( tag ) + 
					  FOUR_BYTE_LEN;
	newSEQ->sos_tag = tag;

	newSEQ->sos_next = ber->ber_sos;
	ber->ber_sos = newSEQ;

	return( 0 );
}

int
ber_start_seq( BerElement *ber, unsigned long tag )
{
	if ( tag == LBER_DEFAULT )
		tag = LBER_SEQUENCE;

	return( ber_start_seqorset( ber, tag ) );
}

int
ber_start_set( BerElement *ber, unsigned long tag )
{
	if ( tag == LBER_DEFAULT )
		tag = LBER_SET;

	return( ber_start_seqorset( ber, tag ) );
}

static int
ber_put_seqorset( BerElement *ber )
{
	unsigned long	len, netlen;
	int		taglen, lenlen;
	unsigned char	ltag = 0x80 + FOUR_BYTE_LEN - 1;
	Seqorset	*next;
	Seqorset	**sos = &ber->ber_sos;

	/*
	 * If this is the toplevel sequence or set, we need to actually
	 * write the stuff out.  Otherwise, it's already been put in
	 * the appropriate buffer and will be written when the toplevel
	 * one is written.  In this case all we need to do is update the
	 * length and tag.
	 */

	len = (*sos)->sos_clen;
	netlen = LBER_HTONL( len );
	if ( sizeof(long) > 4 && len > 0xFFFFFFFFL )
		return( -1 );

	if ( ber->ber_options & LBER_USE_DER ) {
		lenlen = ber_calc_lenlen( len );
	} else {
		lenlen = FOUR_BYTE_LEN;
	}

	if ( (next = (*sos)->sos_next) == NULLSEQORSET ) {
		/* write the tag */
		if ( (taglen = ber_put_tag( ber, (*sos)->sos_tag, 1 )) == -1 )
			return( -1 );

		if ( ber->ber_options & LBER_USE_DER ) {
			/* Write the length in the minimum # of octets */
			if ( ber_put_len( ber, len, 1 ) == -1 )
				return( -1 );

			if (lenlen != FOUR_BYTE_LEN) {
				/*
				 * We set aside FOUR_BYTE_LEN bytes for
				 * the length field.  Move the data if
				 * we don't actually need that much
				 */
				SAFEMEMCPY( (*sos)->sos_first + taglen +
				    lenlen, (*sos)->sos_first + taglen +
				    FOUR_BYTE_LEN, len );
			}
		} else {
			/* Fill FOUR_BYTE_LEN bytes for length field */
			/* one byte of length length */
			if ( ber_write( ber, (char *)&ltag, 1, 1 ) != 1 )
				return( -1 );

			/* the length itself */
			if ( ber_write( ber, (char *) &netlen + sizeof(long)
			    - (FOUR_BYTE_LEN - 1), FOUR_BYTE_LEN - 1, 1 )
			    != FOUR_BYTE_LEN - 1 )
				return( -1 );
		}
		/* The ber_ptr is at the set/seq start - move it to the end */
		(*sos)->sos_ber->ber_ptr += len;
	} else {
		unsigned long	ntag;

		/* the tag */
		taglen = ber_calc_taglen( (*sos)->sos_tag );
		ntag = LBER_HTONL( (*sos)->sos_tag );
		SAFEMEMCPY( (*sos)->sos_first, (char *) &ntag +
		    sizeof(long) - taglen, taglen );

		if ( ber->ber_options & LBER_USE_DER ) {
			ltag = (unsigned char) ((lenlen == 1) ? len : 0x80 + (lenlen - 1));
		}

		/* one byte of length length */
		SAFEMEMCPY( (*sos)->sos_first + 1, &ltag, 1 );

		if ( ber->ber_options & LBER_USE_DER ) {
			if (lenlen > 1) {
				/* Write the length itself */
				SAFEMEMCPY( (*sos)->sos_first + 2,
				    (char *)&netlen + sizeof(unsigned long) -
				    (lenlen - 1),
				    lenlen - 1 );
			}
			if (lenlen != FOUR_BYTE_LEN) {
				/*
				 * We set aside FOUR_BYTE_LEN bytes for
				 * the length field.  Move the data if
				 * we don't actually need that much
				 */
				SAFEMEMCPY( (*sos)->sos_first + taglen +
				    lenlen, (*sos)->sos_first + taglen +
				    FOUR_BYTE_LEN, len );
			}
		} else {
			/* the length itself */
			SAFEMEMCPY( (*sos)->sos_first + taglen + 1,
			    (char *) &netlen + sizeof(long) -
			    (FOUR_BYTE_LEN - 1), FOUR_BYTE_LEN - 1 );
		}

		next->sos_clen += (taglen + lenlen + len);
		next->sos_ptr += (taglen + lenlen + len);
	}

	/* we're done with this seqorset, so free it up */
	free( (char *) (*sos) );
	*sos = next;

	return( taglen + lenlen + len );
}

int
ber_put_seq( BerElement *ber )
{
	return( ber_put_seqorset( ber ) );
}

int
ber_put_set( BerElement *ber )
{
	return( ber_put_seqorset( ber ) );
}

/* VARARGS */
int
ber_printf(
#if defined(PGPSOCKETSLDAP) || defined( MACOS ) || defined( _WIN32 ) || \
    defined( BC31 ) /* jason */
	BerElement *ber, char *fmt, ... )
#else /* MACOS || _WIN32 || BC31 */
	va_alist )
va_dcl
#endif /* MACOS || _WIN32 || BC31 */
{
	va_list		ap;
#if !defined(PGPSOCKETSLDAP) && !defined( MACOS ) && !defined( _WIN32 ) && \
    !defined( BC31 ) /* jason */
	BerElement	*ber;
	char		*fmt;
#endif /* !MACOS && !_WIN32 && !BC31 */
	char		*s, **ss;
	struct berval	**bv;
	int		rc, i;
	unsigned long	len;

#if defined(PGPSOCKETSLDAP) || defined( MACOS ) || defined( _WIN32 ) || \
    defined( BC31 ) /* jason */
	va_start( ap, fmt );
#else /* MACOS || _WIN32 || BC31 */
	va_start( ap );
	ber = va_arg( ap, BerElement * );
	fmt = va_arg( ap, char * );
#endif /* MACOS || _WIN32 || BC31 */

	for ( rc = 0; *fmt && rc != -1; fmt++ ) {
		switch ( *fmt ) {
		case 'b':	/* boolean */
			i = va_arg( ap, int );
			rc = ber_put_boolean( ber, i, ber->ber_tag );
			break;

		case 'i':	/* int */
			i = va_arg( ap, int );
			rc = ber_put_int( ber, i, ber->ber_tag );
			break;

		case 'e':	/* enumeration */
			i = va_arg( ap, int );
			rc = ber_put_enum( ber, i, ber->ber_tag );
			break;

		case 'n':	/* null */
			rc = ber_put_null( ber, ber->ber_tag );
			break;

		case 'o':	/* octet string (non-null terminated) */
			s = va_arg( ap, char * );
			len = va_arg( ap, int );
			rc = ber_put_ostring( ber, s, len, ber->ber_tag );
			break;

		case 's':	/* string */
			s = va_arg( ap, char * );
			rc = ber_put_string( ber, s, ber->ber_tag );
			break;

		case 'B':	/* bit string */
			s = va_arg( ap, char * );
			len = va_arg( ap, int );	/* in bits */
			rc = ber_put_bitstring( ber, s, len, ber->ber_tag );
			break;

		case 't':	/* tag for the next element */
			ber->ber_tag = va_arg( ap, unsigned long );
			ber->ber_usertag = 1;
			break;

		case 'v':	/* vector of strings */
			if ( (ss = va_arg( ap, char ** )) == NULL )
				break;
			for ( i = 0; ss[i] != NULL; i++ ) {
				if ( (rc = ber_put_string( ber, ss[i],
				    ber->ber_tag )) == -1 )
					break;
			}
			break;

		case 'V':	/* sequences of strings + lengths */
			if ( (bv = va_arg( ap, struct berval ** )) == NULL )
				break;
			for ( i = 0; bv[i] != NULL; i++ ) {
				if ( (rc = ber_put_ostring( ber, bv[i]->bv_val,
				    bv[i]->bv_len, ber->ber_tag )) == -1 )
					break;
			}
			break;

		case '{':	/* begin sequence */
			rc = ber_start_seq( ber, ber->ber_tag );
			break;

		case '}':	/* end sequence */
			rc = ber_put_seqorset( ber );
			break;

		case '[':	/* begin set */
			rc = ber_start_set( ber, ber->ber_tag );
			break;

		case ']':	/* end set */
			rc = ber_put_seqorset( ber );
			break;

		default:
#ifndef NO_USERINTERFACE
			fprintf( stderr, "unknown fmt %c\n", *fmt );
#endif /* NO_USERINTERFACE */
			rc = -1;
			break;
		}

		if ( ber->ber_usertag == 0 )
			ber->ber_tag = LBER_DEFAULT;
		else
			ber->ber_usertag = 0;
	}

	va_end( ap );

	return( rc );
}