generic-library/ssh2
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Use new generic crypto APIs.

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This commit is contained in:
Simon Josefsson 2007-01-18 11:22:10 +00:00
parent 10efccbb83
commit 6ede32c5e2
1 changed files with 63 additions and 61 deletions
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124
src/crypt.c
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@ -61,59 +61,52 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_none = {
};
#endif /* LIBSSH2_CRYPT_NONE */
#define MAKE_INIT(name, cipher) \
static int name (LIBSSH2_SESSION *session, \
unsigned char *iv, int *free_iv, \
unsigned char *secret, int *free_secret, \
int encrypt, void **abstract) \
{ \
EVP_CIPHER_CTX *ctx = LIBSSH2_ALLOC(session, sizeof(EVP_CIPHER_CTX)); \
if (!ctx) { \
return -1; \
} \
EVP_CIPHER_CTX_init(ctx); \
EVP_CipherInit(ctx, cipher, secret, iv, encrypt); \
*abstract = ctx; \
*free_iv = 1; \
*free_secret = 1; \
return 0; \
}
struct crypt_ctx {
int encrypt;
_libssh2_cipher_type(algo);
_libssh2_cipher_ctx h;
};
MAKE_INIT(aes256_init, EVP_aes_256_cbc())
MAKE_INIT(aes192_init, EVP_aes_192_cbc())
MAKE_INIT(aes128_init, EVP_aes_128_cbc())
MAKE_INIT(blowfish_init, EVP_bf_cbc())
MAKE_INIT(arcfour_init, EVP_rc4())
MAKE_INIT(cast128_init, EVP_cast5_cbc())
MAKE_INIT(des3_init, EVP_des_ede3_cbc())
static int init (LIBSSH2_SESSION *session,
LIBSSH2_CRYPT_METHOD *method,
unsigned char *iv, int *free_iv,
unsigned char *secret, int *free_secret,
int encrypt, void **abstract)
{
struct crypt_ctx *ctx = LIBSSH2_ALLOC(session,
sizeof(struct crypt_ctx));
if (!ctx) {
return -1;
}
ctx->encrypt = encrypt;
ctx->algo = method->algo;
if (_libssh2_cipher_init (&ctx->h, ctx->algo, iv, secret, encrypt))
{
LIBSSH2_FREE (session, ctx);
return -1;
}
*abstract = ctx;
*free_iv = 1;
*free_secret = 1;
return 0;
}
int crypt(LIBSSH2_SESSION *session, unsigned char *block, void **abstract)
{
EVP_CIPHER_CTX *ctx = *(EVP_CIPHER_CTX **)abstract;
int blocksize = ctx->cipher->block_size;
unsigned char buf[EVP_MAX_BLOCK_LENGTH];
int ret;
if (blocksize == 1) {
/* Hack for arcfour. */
blocksize = 8;
}
ret = EVP_Cipher(ctx, buf, block, blocksize);
if (ret == 1) {
memcpy(block, buf, blocksize);
}
return ret == 1 ? 0 : 1;
struct crypt_ctx *cctx = *(struct crypt_ctx **)abstract;
return _libssh2_cipher_crypt(&cctx->h, cctx->algo,
cctx->encrypt, block);
}
int dtor(LIBSSH2_SESSION *session, void **abstract)
{
EVP_CIPHER_CTX **ctx = (EVP_CIPHER_CTX **)abstract;
if (ctx && *ctx) {
EVP_CIPHER_CTX_cleanup(*ctx);
LIBSSH2_FREE(session, *ctx);
*abstract = NULL;
}
return 0;
struct crypt_ctx **cctx = (struct crypt_ctx **)abstract;
if (cctx && *cctx) {
_libssh2_cipher_dtor(&(*cctx)->h);
LIBSSH2_FREE(session, *cctx);
*abstract = NULL;
}
return 0;
}
static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_3des_cbc = {
@ -122,9 +115,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_3des_cbc = {
8, /* initial value length */
24, /* secret length */
0, /* flags */
&des3_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_3des
};
#if LIBSSH2_AES
@ -134,9 +128,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_aes128_cbc = {
16, /* initial value length */
16, /* secret length -- 16*8 == 128bit */
0, /* flags */
&aes128_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_aes128
};
static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_aes192_cbc = {
@ -145,9 +140,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_aes192_cbc = {
16, /* initial value length */
24, /* secret length -- 24*8 == 192bit */
0, /* flags */
&aes192_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_aes192
};
static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_aes256_cbc = {
@ -156,9 +152,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_aes256_cbc = {
16, /* initial value length */
32, /* secret length -- 32*8 == 256bit */
0, /* flags */
&aes256_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_aes256
};
/* rijndael-cbc@lysator.liu.se == aes256-cbc */
@ -168,9 +165,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_rijndael_cbc_lysator_liu_se = {
16, /* initial value length */
32, /* secret length -- 32*8 == 256bit */
0, /* flags */
&aes256_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_aes256
};
#endif /* LIBSSH2_AES */
@ -181,9 +179,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_blowfish_cbc = {
8, /* initial value length */
16, /* secret length */
0, /* flags */
&blowfish_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_blowfish
};
#endif /* LIBSSH2_BLOWFISH */
@ -194,9 +193,10 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_cast128_cbc = {
8, /* initial value length */
16, /* secret length */
0, /* flags */
&cast128_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_cast5
};
#endif /* LIBSSH2_CAST */
@ -207,13 +207,15 @@ static LIBSSH2_CRYPT_METHOD libssh2_crypt_method_arcfour = {
8, /* initial value length */
16, /* secret length */
0, /* flags */
&arcfour_init,
&init,
&crypt,
&dtor
&dtor,
_libssh2_cipher_arcfour
};
#endif /* LIBSSH2_RC4 */
static LIBSSH2_CRYPT_METHOD *_libssh2_crypt_methods[] = {
&libssh2_crypt_method_aes256_cbc,
#if LIBSSH2_AES
&libssh2_crypt_method_aes256_cbc,
&libssh2_crypt_method_rijndael_cbc_lysator_liu_se, /* == aes256-cbc */