VS2008 openssl实现aes加解密字符串

根据提供的引用内容，下面给出VS2008 openssl实现AES加解密字符串的方法。
1. 下载openssl相关库和头文件，并配置好环境变量。
2. 在头文件中引入openssl对应的库文件。

#include <openssl/aes.h>

3. 实现AES加密和解密函数，下面分别给出ECB和CBC模式的代码。
ECB模式：

void AESEncrypt_ECB(const unsigned char *in, const unsigned char *key,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_encrypt_key(key, 128, &aes_key); //设置密钥
    for (int i = 0; i < length; i += AES_BLOCK_SIZE) {
        AES_encrypt(in + i, out + i, &aes_key);//加密
    }
}

void AESDecrypt_ECB(const unsigned char *in, const unsigned char *key,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_decrypt_key(key, 128, &aes_key); //设置密钥
    for (int i = 0; i < length; i += AES_BLOCK_SIZE) {
        AES_decrypt(in + i, out + i, &aes_key);//解密
    }
}

CBC模式：

void AESEncrypt_CBC(const unsigned char *in, const unsigned char *key,const unsigned char *iv,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_encrypt_key(key, 128, &aes_key); //设置密钥
    AES_cbc_encrypt(in, out, length, &aes_key, iv, AES_ENCRYPT); //加密
}

void AESDecrypt_CBC(const unsigned char *in, const unsigned char *key,const unsigned char *iv,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_decrypt_key(key, 128, &aes_key); //设置密钥
    AES_cbc_encrypt(in, out, length, &aes_key, iv, AES_DECRYPT); //解密
}

4. 在主函数中调用上述加解密函数，完整代码如下：

#include <stdio.h>
#include <string.h>
#include <openssl/aes.h>

//ECB模式加解密
void AESEncrypt_ECB(const unsigned char *in, const unsigned char *key,
                    unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_encrypt_key(key, 128, &aes_key); //设置密钥
    for (int i = 0; i < length; i += AES_BLOCK_SIZE) {
        AES_encrypt(in + i, out + i, &aes_key);//加密
    }
}

void AESDecrypt_ECB(const unsigned char *in, const unsigned char *key,
                    unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_decrypt_key(key, 128, &aes_key); //设置密钥
    for (int i = 0; i < length; i += AES_BLOCK_SIZE) {
        AES_decrypt(in + i, out + i, &aes_key);//解密
    }
}

//CBC模式加解密
void AESEncrypt_CBC(const unsigned char *in, const unsigned char *key,
                    const unsigned char *iv,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_encrypt_key(key, 128, &aes_key); //设置密钥
    AES_cbc_encrypt(in, out, length, &aes_key, iv, AES_ENCRYPT); //加密
}

void AESDecrypt_CBC(const unsigned char *in, const unsigned char *key,
                    const unsigned char *iv,unsigned char *out, int length) {
    AES_KEY aes_key;
    AES_set_decrypt_key(key, 128, &aes_key); //设置密钥
    AES_cbc_encrypt(in, out, length, &aes_key, iv, AES_DECRYPT); //解密
}

int main() {
    //ECB模式下的AES加解密
    unsigned char key[16] = {0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70};
    char plainText[] = "Hello World";
    int length = strlen(plainText);
    unsigned char padded[length + length % AES_BLOCK_SIZE];
    memset(padded, 0, sizeof(padded));
    memcpy(padded, plainText, length);
    AESEncrypt_ECB(padded, key, padded, sizeof(padded));
    printf("ECB模式下的AES加密结果: ");
    for (int i = 0; i < sizeof(padded); i++) {
        printf("%02X ", padded[i]);
    }
    printf("\n");
    AESDecrypt_ECB(padded, key, padded, sizeof(padded));
    printf("ECB模式下的AES解密结果: %s\n", padded);

    //CBC模式下的AES加解密
    unsigned char iv[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};
    char plainText1[] = "Hello World";
    int length1 = strlen(plainText1);
    unsigned char padded1[length1 + length1 % AES_BLOCK_SIZE];
    memset(padded1, 0, sizeof(padded1));
    memcpy(padded1, plainText1, length1);
    AESEncrypt_CBC(padded1, key, iv, padded1, sizeof(padded1));
    printf("CBC模式下的AES加密结果: ");
    for (int i = 0; i < sizeof(padded1); i++) {
        printf("%02X ", padded1[i]);
    }
    printf("\n");
    AESDecrypt_CBC(padded1, key, iv, padded1, sizeof(padded1));
    printf("CBC模式下的AES解密结果: %s\n", padded1);
    return 0;
}