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OpenSSL with C++, 3DES Decrypt
Posted on 2012-12-28
Hello Experts,
I have to create code to decrypt using OpenSSL 3DES in C++.
I decrypted my encrypted string with OpenSSL command line like followings,
echo -en "\xca\x99\x19\x61\xd1\x21\
openssl des3 -d
-K e3c254b6ec976b4638f216c83d
I have to create code those function in C++(DES_ncbc_encrypt()..et
I've already installed OpenSSL in my environment.
Windows 7 32bit, C++Builder
Please advice.
I have to create code to decrypt using OpenSSL 3DES in C++.
I decrypted my encrypted string with OpenSSL command line like followings,
echo -en "\xca\x99\x19\x61\xd1\x21\
openssl des3 -d
-K e3c254b6ec976b4638f216c83d
I have to create code those function in C++(DES_ncbc_encrypt()..et
I've already installed OpenSSL in my environment.
Windows 7 32bit, C++Builder
Please advice.
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3 Comments
Active today
wondering if this help
http://stackoverflow.com/questions/8528995/openssl-c-3des-file-encryption-decryption-fail
http://stackoverflow.com/questions/8528995/openssl-c-3des-file-encryption-decryption-fail
Thank you for information.
I coded followings..
The answer must be "berobero", but I got 8 letters and was not the answer.
Please advice, if you have any idea..
I coded followings..
unsigned char key[] = {0xe3,0xc2,0x54,0xb6,0xec,0x97,0x6b,0x46,0x38,0xf2,0x16,0xc8,0x3d,0xe6,0x15,0x04,0x16,0x6d,0x70,0x70,0xae,0x97,0xbf,0xb6};
unsigned char iv[] = {0x4e,0xed,0x0d,0x2f,0x1c,0x48,0xe0,0xf1};
unsigned char encrypted[] = {0xca,0x99,0x19,0x61,0xd1,0x21,0x4f,0x77,0x3e,0x0d,0xd3,0xcc,0x07,0x9f,0x56,0x24};
const EVP_CIPHER* cipherType = EVP_des_ede3_ecb();
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
int rt = EVP_DecryptInit(&ctx, (const EVP_CIPHER*)cipherType, (const unsigned char*)key, (const unsigned char*)iv);
int out_len;
char ciphertext[2048] = {0};
memset(ciphertext, 0x00, sizeof(ciphertext));
rt = EVP_DecryptUpdate(&ctx, (unsigned char*)ciphertext, &out_len, (const unsigned char*)encrypted, 16);
rt = EVP_DecryptFinal(&ctx, (unsigned char*)ciphertext, &out_len);
rt = EVP_CIPHER_CTX_cleanup(&ctx);
The answer must be "berobero", but I got 8 letters and was not the answer.
Please advice, if you have any idea..
Active today
Was thinking an6thing to do with padding or the parameter to decrypt function
http://www.openssl.org/docs/crypto/EVP_EncryptInit.html
.
EVP_DecryptInit_ex(),EVP_D
http://www.openssl.org/docs/crypto/EVP_EncryptInit.html
.
EVP_DecryptInit_ex(),EVP_D
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