+#include <openssl/err.h>
+#include <openssl/sha.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include "crypto_if.h"
-static int ossl_encrypt(void *pt, int ptlen, void *key, int keylen,
- void *ct, int *ctlen)
+static unsigned long ossl_encrypt(void *key, int keylen, void *iv,
+ void *pt, void *ct, int tlen)
{
- EVP_CIPHER_CTX ctx;
- unsigned char iv[16] = {0};
- int outlen1, outlen2;
+ EVP_CIPHER_CTX ctx;
+ int outlen1, outlen2;
+ unsigned char hkey[16];
- EVP_EncryptInit(&ctx, EVP_aes_256_cbc(), key, iv);
- EVP_EncryptUpdate(&ctx, ct, &outlen1, pt, ptlen);
- EVP_EncryptFinal(&ctx, ct + outlen1, &outlen2);
- if (outlen1 + outlen2 > *ctlen) return -1;
- *ctlen = outlen1 + outlen2;
-
- return 0;
+ if (EVP_BytesToKey(EVP_aes_128_cbc(), EVP_sha1(),
+ NULL, key, keylen, 5, hkey, NULL) != 16) return 1UL;
+ if (!EVP_EncryptInit(&ctx, EVP_aes_128_cbc(), hkey, iv))
+ return ERR_get_error();
+ if (!EVP_EncryptUpdate(&ctx, ct, &outlen1, pt, tlen))
+ return ERR_get_error();
+ if (!EVP_EncryptFinal(&ctx, ct + outlen1, &outlen2))
+ return ERR_get_error();
+ if (outlen1 + outlen2 != tlen) return 1UL;
+ return 0UL;
}
-static int ossl_decrypt()
+static unsigned long ossl_decrypt(void *key, int keylen, void *iv,
+ void *ct, void *pt, int tlen)
{
- return 0;
+ EVP_CIPHER_CTX ctx;
+ int outlen1, outlen2;
+ unsigned char hkey[16];
+
+ if (EVP_BytesToKey(EVP_aes_128_cbc(), EVP_sha1(),
+ NULL, key, keylen, 5, hkey, NULL) != 16) return 1UL;
+ if (!EVP_DecryptInit(&ctx, EVP_aes_128_cbc(), hkey, iv))
+ return ERR_get_error();
+ if (!EVP_DecryptUpdate(&ctx, ct, &outlen1, pt, tlen))
+ return ERR_get_error();
+ if (!EVP_DecryptFinal(&ctx, ct + outlen1, &outlen2))
+ return ERR_get_error();
+ if (outlen1 + outlen2 != tlen) return 1UL;
+ return 0UL;
}
-static int ossl_hash()
+static unsigned long ossl_hash(void *pt, int tlen, void *tag, int *taglen)
{
- return 0;
+ SHA_CTX sctx;
+
+ if (!SHA1_Init(&sctx)) return ERR_get_error();
+ if (!SHA1_Update(&sctx, pt, tlen)) return ERR_get_error();
+ if (!SHA1_Final(tag, &sctx)) return ERR_get_error();
+ *taglen = 160;
+ return 0UL;
}
-static int ossl_hmac()
+static unsigned long ossl_hmac(void *pt, int tlen, void *key, int keylen,
+ void *tag, int *taglen)
{
- return 0;
-}
+ HMAC_CTX hctx;
-// result = HMAC(EVP_sha256(), key, 999, data, 888, NULL, NULL);
-// EVP_MD *
+ HMAC_CTX_init(&hctx);
+ if (!HMAC_Init(&hctx, key, keylen, EVP_sha1())) return ERR_get_error();
+ if (!HMAC_Update(&hctx, pt, tlen)) return ERR_get_error();
+ if (!HMAC_Final(&hctx, tag, (unsigned int *)taglen))
+ return ERR_get_error();
+ HMAC_CTX_cleanup(&hctx);
+ return 0UL;
+}
-// HMAC_CTX hctx;
-// HMAC_CTX_init(&hctx);
-// if (HMAC_Init(&hctx, key, keylen, EVP_sha1())) success;
-// if (HMAC_Update(&hctx, data, datalen)) success;
-// if (HMAC_Final(&hctx, &digest, &digestlen)) success
-// HMAC_CTX_cleanup(&hctx);
+static const char *ossl_errstr(unsigned long err)
+{
+ return ERR_error_string(err, NULL);
+}
struct crypto_interface ossl_crypto_if = {
.name = "openssl",
.decrypt = ossl_decrypt,
.hash = ossl_hash,
.hmac = ossl_hmac,
+ .errstr = ossl_errstr,
};