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add EVP_CIPHER_CTX_ctrl and EVP_CIPHER_CTX_rand_key

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@23949 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2008-10-19 07:56:00 +00:00
parent 3d93ee6cea
commit 3a343cc41a
1 changed files with 37 additions and 0 deletions
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37
lib/hcrypto/evp.c
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@@ -1626,6 +1626,43 @@ EVP_BytesToKey(const EVP_CIPHER *type,
return EVP_CIPHER_key_length(type);
}
/**
* Generate a random key for the specificed EVP_CIPHER.
*
* @param ctx EVP_CIPHER_CTX type to build the key for.
* @param key return key, must be at least EVP_CIPHER_key_length() byte long.
*
* @return 1 for success, 0 for failure.
*
* @ingroup hcrypto_core
*/
int
EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, void *key)
{
if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
if (RAND_bytes(key, ctx->key_len) != 1)
return 0;
return 1;
}
/**
* Perform a operation on a ctx
*
* @return 1 for success, 0 for failure.
*
* @ingroup hcrypto_core
*/
int
EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *data)
{
if (ctx->cipher == NULL || ctx->cipher->ctrl == NULL)
return 0;
return (*ctx->cipher->ctrl)(ctx, type, arg, data);
}
/**
* Add all algorithms to the crypto core.
*