lib/libssh2
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less hard coding of cipher mode in libgcrypt backend

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This commit is contained in:
Simon Josefsson
2009-10-19 17:36:50 +02:00
parent 1e80194b97
commit 60d73d5663
2 changed files with 31 additions and 19 deletions
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20
src/libgcrypt.c
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@@ -524,16 +524,14 @@ _libssh2_cipher_init(_libssh2_cipher_ctx * h,
_libssh2_cipher_type(algo),
unsigned char *iv, unsigned char *secret, int encrypt)
{
int mode = 0, ret;
int keylen = gcry_cipher_get_algo_keylen(algo);
int ret;
int cipher = _libssh2_gcry_cipher (algo);
int mode = _libssh2_gcry_mode (algo);
int keylen = gcry_cipher_get_algo_keylen(cipher);
(void) encrypt;
if (algo != GCRY_CIPHER_ARCFOUR) {
mode = GCRY_CIPHER_MODE_CBC;
}
ret = gcry_cipher_open(h, algo, mode, 0);
ret = gcry_cipher_open(h, cipher, mode, 0);
if (ret) {
return -1;
}
@@ -544,8 +542,8 @@ _libssh2_cipher_init(_libssh2_cipher_ctx * h,
return -1;
}
if (algo != GCRY_CIPHER_ARCFOUR) {
int blklen = gcry_cipher_get_algo_blklen(algo);
if (mode != GCRY_CIPHER_MODE_STREAM) {
int blklen = gcry_cipher_get_algo_blklen(cipher);
ret = gcry_cipher_setiv(*h, iv, blklen);
if (ret) {
gcry_cipher_close(*h);
@@ -561,8 +559,10 @@ _libssh2_cipher_crypt(_libssh2_cipher_ctx * ctx,
_libssh2_cipher_type(algo),
int encrypt, unsigned char *block)
{
size_t blklen = gcry_cipher_get_algo_blklen(algo);
int cipher = _libssh2_gcry_cipher (algo);
size_t blklen = gcry_cipher_get_algo_blklen(cipher);
int ret;
if (blklen == 1) {
/* Hack for arcfour. */
blklen = 8;