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我为我正在做的一个项目找到了 AES 的实现。

但是，当我集成它时，我在构建过程中遇到以下错误。

In file included from ff.h:26:0,
             from disp.h:4,
             from main.c:14:
aes.h:14:3: error: conflicting types for 'AesCtx'
aes.h:14:3: note: previous declaration of 'AesCtx' was here
aes.h:28:5: error: conflicting types for 'AesCtxIni'
aes.h:28:5: note: previous declaration of 'AesCtxIni' was here
aes.h:29:5: error: conflicting types for 'AesEncrypt'
aes.h:29:5: note: previous declaration of 'AesEncrypt' was here
aes.h:30:5: error: conflicting types for 'AesDecrypt'
aes.h:30:5: note: previous declaration of 'AesDecrypt' was here

头文件本身是：

// AES context structure
typedef struct {
 unsigned int Ek[60];
 unsigned int Dk[60];
 unsigned int Iv[4];
 unsigned char Nr;
 unsigned char Mode;
} AesCtx;

// key length in bytes
#define KEY128 16
#define KEY192 24
#define KEY256 32
// block size in bytes
#define BLOCKSZ 16
// mode
#define EBC 0
#define CBC 1

// AES API function prototype

int AesCtxIni(AesCtx *pCtx, unsigned char *pIV, unsigned char *pKey, unsigned int KeyLen, unsigned char Mode);
int AesEncrypt(AesCtx *pCtx, unsigned char *pData, unsigned char *pCipher, unsigned int DataLen);
int AesDecrypt(AesCtx *pCtx, unsigned char *pCipher, unsigned char *pData, unsigned int CipherLen);

然后使用相应的 C 文件。

int AesCtxIni(AesCtx *pCtx, unsigned char *pIV, unsigned char *pKey, unsigned int KeyLen, unsigned char Mode)
{
    // Cut out code for brevity
}

int AesEncrypt(AesCtx *pCtx, unsigned char *pData, unsigned char *pCipher, unsigned int DataLen)
{
    // Cut out code for brevity
}

int AesDecrypt(AesCtx *pCtx, unsigned char *pCipher, unsigned char *pData, unsigned int CipherLen)
{
    // Cut out code for brevity
}

我知道这些错误的发生通常是因为该函数尚未预先声明，或者因为它与它的声明略有不同，但我看不出有什么区别。

有任何想法吗？

4

1 回答 1

5

你用的是什么编译器？我最好的猜测是它试图说aes.h的是#included 两次。尝试在开头和结尾添加标题保护aes.h：

#ifndef AES_H_
#define AES_H_

typedef struct {
...
int AesDecrypt(AesCtx *pCtx, unsigned char *pCipher, unsigned char *pData, unsigned int CipherLen);

#endif /* !AES_H_ */
于 2013-02-13T09:01:59.067 回答