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MySQL 5.1: mysql/src/5.1-dbg/include/my_aes.h File Reference

mysql/src/5.1-dbg/include/my_aes.h File Reference

#include "rijndael.h"

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Defines
#define	AES_KEY_LENGTH 128
Functions
int	my_aes_encrypt (const char source, int source_length, char dest, const char *key, int key_length)
int	my_aes_decrypt (const char source, int source_length, char dest, const char *key, int key_length)
int	my_aes_get_size (int source_length)

Define Documentation

#define AES_KEY_LENGTH 128

Definition at line 25 of file my_aes.h.

Referenced by my_aes_create_key().

Function Documentation

int my_aes_decrypt	(	const char *	source,
		int	source_length,
		char *	dest,
		const char *	key,
		int	key_length
	)

Definition at line 175 of file my_aes.c.

References AES_BAD_DATA, AES_BLOCK_SIZE, AES_DECRYPT, yaSSL::block, memcpy, my_aes_create_key(), KEYINSTANCE::nr, rijndaelDecrypt(), and KEYINSTANCE::rk.

Referenced by Item_func_aes_decrypt::val_str().

00177 {
00178   KEYINSTANCE aes_key;
00179   uint8 block[AES_BLOCK_SIZE];  /* 128 bit block used for padding */
00180   int rc;                       /* Result codes */
00181   int num_blocks;               /* Number of complete blocks */
00182   uint pad_len;                 /* Pad size for the last block */
00183   int i;
00184 
00185   if ((rc=my_aes_create_key(&aes_key,AES_DECRYPT,key,key_length)))
00186     return rc;
00187 
00188   num_blocks = source_length/AES_BLOCK_SIZE;
00189 
00190   if ((source_length != num_blocks*AES_BLOCK_SIZE) || num_blocks ==0 )
00191     return AES_BAD_DATA; /* Input size has to be even and at least one block */
00192 
00193   for (i = num_blocks-1; i > 0; i--)   /* Decode all but last blocks */
00194   {
00195     rijndaelDecrypt(aes_key.rk, aes_key.nr, (const uint8*) source,
00196                     (uint8*) dest);
00197     source+= AES_BLOCK_SIZE;
00198     dest+= AES_BLOCK_SIZE;
00199   }
00200 
00201   rijndaelDecrypt(aes_key.rk, aes_key.nr, (const uint8*) source, block);
00202   /* Use last char in the block as size */
00203   pad_len = (uint) (uchar) block[AES_BLOCK_SIZE-1];
00204 
00205   if (pad_len > AES_BLOCK_SIZE)
00206     return AES_BAD_DATA;
00207   /* We could also check whole padding but we do not really need this */
00208 
00209   memcpy(dest, block, AES_BLOCK_SIZE - pad_len);
00210   return AES_BLOCK_SIZE*num_blocks - pad_len;
00211 }

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int my_aes_encrypt	(	const char *	source,
		int	source_length,
		char *	dest,
		const char *	key,
		int	key_length
	)

Definition at line 127 of file my_aes.c.

References AES_BLOCK_SIZE, AES_ENCRYPT, bfill, yaSSL::block, memcpy, my_aes_create_key(), KEYINSTANCE::nr, rijndaelEncrypt(), and KEYINSTANCE::rk.

Referenced by Item_func_aes_encrypt::val_str().

00129 {
00130   KEYINSTANCE aes_key;
00131   uint8 block[AES_BLOCK_SIZE];  /* 128 bit block used for padding */
00132   int rc;                       /* result codes */
00133   int num_blocks;               /* number of complete blocks */
00134   char pad_len;                 /* pad size for the last block */
00135   int i;
00136 
00137   if ((rc= my_aes_create_key(&aes_key,AES_ENCRYPT,key,key_length)))
00138     return rc;
00139 
00140   num_blocks = source_length/AES_BLOCK_SIZE;
00141 
00142   for (i = num_blocks; i > 0; i--)   /* Encode complete blocks */
00143   {
00144     rijndaelEncrypt(aes_key.rk, aes_key.nr, (const uint8*) source,
00145                     (uint8*) dest);
00146     source+= AES_BLOCK_SIZE;
00147     dest+= AES_BLOCK_SIZE;
00148   }
00149 
00150   /* Encode the rest. We always have incomplete block */
00151   pad_len = AES_BLOCK_SIZE - (source_length - AES_BLOCK_SIZE*num_blocks);
00152   memcpy(block, source, 16 - pad_len);
00153   bfill(block + AES_BLOCK_SIZE - pad_len, pad_len, pad_len);
00154   rijndaelEncrypt(aes_key.rk, aes_key.nr, block, (uint8*) dest);
00155   return AES_BLOCK_SIZE*(num_blocks + 1);
00156 }

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int my_aes_get_size ( int source_length )

Definition at line 225 of file my_aes.c.

References AES_BLOCK_SIZE.

Referenced by Item_func_aes_encrypt::fix_length_and_dec(), and Item_func_aes_encrypt::val_str().

00226 {
00227   return AES_BLOCK_SIZE*(source_length/AES_BLOCK_SIZE)+AES_BLOCK_SIZE;
00228 }

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mysql/src/5.1-dbg/include/my_aes.h File Reference

Defines

Functions

Define Documentation

Function Documentation