version 1.4, 1999/11/12 17:28:35 |
version 1.5, 1999/11/23 22:25:52 |
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void |
void |
buffer_put_bignum(Buffer *buffer, BIGNUM *value) |
buffer_put_bignum(Buffer *buffer, BIGNUM *value) |
{ |
{ |
int bits = BN_num_bits(value); |
int bits = BN_num_bits(value); |
int bin_size = (bits + 7) / 8; |
int bin_size = (bits + 7) / 8; |
char *buf = xmalloc(bin_size); |
char *buf = xmalloc(bin_size); |
int oi; |
int oi; |
char msg[2]; |
char msg[2]; |
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/* Get the value of in binary */ |
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oi = BN_bn2bin(value, buf); |
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if (oi != bin_size) |
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fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d", |
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oi, bin_size); |
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/* Store the number of bits in the buffer in two bytes, msb first. */ |
/* Get the value of in binary */ |
PUT_16BIT(msg, bits); |
oi = BN_bn2bin(value, buf); |
buffer_append(buffer, msg, 2); |
if (oi != bin_size) |
/* Store the binary data. */ |
fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d", |
buffer_append(buffer, buf, oi); |
oi, bin_size); |
/* Clear the temporary data. */ |
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memset(buf, 0, bin_size); |
/* Store the number of bits in the buffer in two bytes, msb first. */ |
xfree(buf); |
PUT_16BIT(msg, bits); |
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buffer_append(buffer, msg, 2); |
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/* Store the binary data. */ |
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buffer_append(buffer, buf, oi); |
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/* Clear the temporary data. */ |
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memset(buf, 0, bin_size); |
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xfree(buf); |
} |
} |
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/* Retrieves an BIGNUM from the buffer. */ |
/* Retrieves an BIGNUM from the buffer. */ |
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int |
int |
buffer_get_bignum(Buffer *buffer, BIGNUM *value) |
buffer_get_bignum(Buffer *buffer, BIGNUM *value) |
{ |
{ |
int bits, bytes; |
int bits, bytes; |
unsigned char buf[2], *bin; |
unsigned char buf[2], *bin; |
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/* Get the number for bits. */ |
/* Get the number for bits. */ |
buffer_get(buffer, (char *)buf, 2); |
buffer_get(buffer, (char *) buf, 2); |
bits = GET_16BIT(buf); |
bits = GET_16BIT(buf); |
/* Compute the number of binary bytes that follow. */ |
/* Compute the number of binary bytes that follow. */ |
bytes = (bits + 7) / 8; |
bytes = (bits + 7) / 8; |
if (buffer_len(buffer) < bytes) |
if (buffer_len(buffer) < bytes) |
fatal("buffer_get_bignum: input buffer too small"); |
fatal("buffer_get_bignum: input buffer too small"); |
bin = buffer_ptr(buffer); |
bin = buffer_ptr(buffer); |
BN_bin2bn(bin, bytes, value); |
BN_bin2bn(bin, bytes, value); |
buffer_consume(buffer, bytes); |
buffer_consume(buffer, bytes); |
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return 2 + bytes; |
return 2 + bytes; |
} |
} |
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/* Returns an integer from the buffer (4 bytes, msb first). */ |
/* Returns an integer from the buffer (4 bytes, msb first). */ |
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unsigned int buffer_get_int(Buffer *buffer) |
unsigned int |
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buffer_get_int(Buffer *buffer) |
{ |
{ |
unsigned char buf[4]; |
unsigned char buf[4]; |
buffer_get(buffer, (char *)buf, 4); |
buffer_get(buffer, (char *) buf, 4); |
return GET_32BIT(buf); |
return GET_32BIT(buf); |
} |
} |
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/* Stores an integer in the buffer in 4 bytes, msb first. */ |
/* Stores an integer in the buffer in 4 bytes, msb first. */ |
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void buffer_put_int(Buffer *buffer, unsigned int value) |
void |
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buffer_put_int(Buffer *buffer, unsigned int value) |
{ |
{ |
char buf[4]; |
char buf[4]; |
PUT_32BIT(buf, value); |
PUT_32BIT(buf, value); |
buffer_append(buffer, buf, 4); |
buffer_append(buffer, buf, 4); |
} |
} |
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/* Returns an arbitrary binary string from the buffer. The string cannot |
/* Returns an arbitrary binary string from the buffer. The string cannot |
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will be stored there. A null character will be automatically appended |
will be stored there. A null character will be automatically appended |
to the returned string, and is not counted in length. */ |
to the returned string, and is not counted in length. */ |
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char *buffer_get_string(Buffer *buffer, unsigned int *length_ptr) |
char * |
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buffer_get_string(Buffer *buffer, unsigned int *length_ptr) |
{ |
{ |
unsigned int len; |
unsigned int len; |
char *value; |
char *value; |
/* Get the length. */ |
/* Get the length. */ |
len = buffer_get_int(buffer); |
len = buffer_get_int(buffer); |
if (len > 256*1024) |
if (len > 256 * 1024) |
fatal("Received packet with bad string length %d", len); |
fatal("Received packet with bad string length %d", len); |
/* Allocate space for the string. Add one byte for a null character. */ |
/* Allocate space for the string. Add one byte for a null character. */ |
value = xmalloc(len + 1); |
value = xmalloc(len + 1); |
/* Get the string. */ |
/* Get the string. */ |
buffer_get(buffer, value, len); |
buffer_get(buffer, value, len); |
/* Append a null character to make processing easier. */ |
/* Append a null character to make processing easier. */ |
value[len] = 0; |
value[len] = 0; |
/* Optionally return the length of the string. */ |
/* Optionally return the length of the string. */ |
if (length_ptr) |
if (length_ptr) |
*length_ptr = len; |
*length_ptr = len; |
return value; |
return value; |
} |
} |
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/* Stores and arbitrary binary string in the buffer. */ |
/* Stores and arbitrary binary string in the buffer. */ |
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void buffer_put_string(Buffer *buffer, const void *buf, unsigned int len) |
void |
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buffer_put_string(Buffer *buffer, const void *buf, unsigned int len) |
{ |
{ |
buffer_put_int(buffer, len); |
buffer_put_int(buffer, len); |
buffer_append(buffer, buf, len); |
buffer_append(buffer, buf, len); |
} |
} |
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/* Returns a character from the buffer (0 - 255). */ |
/* Returns a character from the buffer (0 - 255). */ |
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int buffer_get_char(Buffer *buffer) |
int |
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buffer_get_char(Buffer *buffer) |
{ |
{ |
char ch; |
char ch; |
buffer_get(buffer, &ch, 1); |
buffer_get(buffer, &ch, 1); |
return (unsigned char)ch; |
return (unsigned char) ch; |
} |
} |
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/* Stores a character in the buffer. */ |
/* Stores a character in the buffer. */ |
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void buffer_put_char(Buffer *buffer, int value) |
void |
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buffer_put_char(Buffer *buffer, int value) |
{ |
{ |
char ch = value; |
char ch = value; |
buffer_append(buffer, &ch, 1); |
buffer_append(buffer, &ch, 1); |
} |
} |