void
scramble(char *to, const char *message, const char *password)
{
SHA1_CONTEXT sha1_context;
uint8 hash_stage1[SHA1_HASH_SIZE];
uint8 hash_stage2[SHA1_HASH_SIZE];
mysql_sha1_reset(&sha1_context);
/* Stage 1: hash password */
mysql_sha1_input(&sha1_context, (uint8 *)password,
(uint)strlen(password));
mysql_sha1_result(&sha1_context, hash_stage1);
/*
* Stage 2:
* hash stage 1;
* Note that hash_stage2 is stored in the database
*/
mysql_sha1_reset(&sha1_context);
mysql_sha1_input(&sha1_context, hash_stage1, SHA1_HASH_SIZE);
mysql_sha1_result(&sha1_context, hash_stage2);
/* Create crypt string as sha1(message, hash_stage2) */;
mysql_sha1_reset(&sha1_context);
mysql_sha1_input(&sha1_context, (const uint8 *) message,
SCRAMBLE_LENGTH);
mysql_sha1_input(&sha1_context, hash_stage2, SHA1_HASH_SIZE);
/* Xor allows 'from' and 'to' overlap: lets take advantage of it */
mysql_sha1_result(&sha1_context, (uint8 *) to);
my_crypt(to, (const uchar *) to, hash_stage1, SCRAMBLE_LENGTH);
}
void
get_hash_stage1 (const char *scramble_arg, const char *message,
const uint8 * hash_stage2, uint8 * hash_stage1)
{
SHA1_CONTEXT sha1_context;
mysql_sha1_reset (&sha1_context);
/* create key to encrypt scramble */
mysql_sha1_input (&sha1_context, (const uint8 *) message, SCRAMBLE_LENGTH);
mysql_sha1_input (&sha1_context, hash_stage2, SHA1_HASH_SIZE);
mysql_sha1_result (&sha1_context, hash_stage1);
/* encrypt scramble */
my_crypt ((char *) hash_stage1, hash_stage1, (const uchar *) scramble_arg,
SCRAMBLE_LENGTH);
}
void
make_scrambled_password(char *to, const char *password)
{
SHA1_CONTEXT sha1_context;
uint8 hash_stage2[SHA1_HASH_SIZE];
mysql_sha1_reset(&sha1_context);
/* stage 1: hash password */
mysql_sha1_input(&sha1_context, (uint8 *) password, (uint) strlen(password));
mysql_sha1_result(&sha1_context, (uint8 *) to);
/* stage 2: hash stage1 output */
mysql_sha1_reset(&sha1_context);
mysql_sha1_input(&sha1_context, (uint8 *) to, SHA1_HASH_SIZE);
/* separate buffer is used to pass 'to' in octet2hex */
mysql_sha1_result(&sha1_context, hash_stage2);
/* convert hash_stage2 to hex string */
*to++= PVERSION41_CHAR;
octet2hex(to, (char*) hash_stage2, SHA1_HASH_SIZE);
}
void
scramble_with_hash_stage1 (char *to, const char *message,
const unsigned char *hash_stage1)
{
SHA1_CONTEXT sha1_context;
uint8 hash_stage2[SHA1_HASH_SIZE];
/* stage 2: hash stage 1; note that hash_stage2 is stored in the database */
mysql_sha1_reset (&sha1_context);
mysql_sha1_input (&sha1_context, hash_stage1, SHA1_HASH_SIZE);
mysql_sha1_result (&sha1_context, hash_stage2);
/* create crypt string as sha1(message, hash_stage2) */ ;
mysql_sha1_reset (&sha1_context);
mysql_sha1_input (&sha1_context, (const uint8 *) message, SCRAMBLE_LENGTH);
mysql_sha1_input (&sha1_context, hash_stage2, SHA1_HASH_SIZE);
/* xor allows 'from' and 'to' overlap: lets take advantage of it */
mysql_sha1_result (&sha1_context, (uint8 *) to);
my_crypt (to, (const uchar *) to, hash_stage1, SCRAMBLE_LENGTH);
}
my_bool
check_scramble(const char *scramble_arg, const char *message,
const uint8 *hash_stage2)
{
SHA1_CONTEXT sha1_context;
uint8 buf[SHA1_HASH_SIZE];
uint8 hash_stage2_reassured[SHA1_HASH_SIZE];
mysql_sha1_reset(&sha1_context);
/* create key to encrypt scramble */
mysql_sha1_input(&sha1_context, (const uint8 *) message, SCRAMBLE_LENGTH);
mysql_sha1_input(&sha1_context, hash_stage2, SHA1_HASH_SIZE);
mysql_sha1_result(&sha1_context, buf);
/* encrypt scramble */
my_crypt((char *) buf, buf, (const uchar *) scramble_arg, SCRAMBLE_LENGTH);
/* now buf supposedly contains hash_stage1: so we can get hash_stage2 */
mysql_sha1_reset(&sha1_context);
mysql_sha1_input(&sha1_context, buf, SHA1_HASH_SIZE);
mysql_sha1_result(&sha1_context, hash_stage2_reassured);
return memcmp(hash_stage2, hash_stage2_reassured, SHA1_HASH_SIZE);
}
