break out the hcrypto part

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@23549 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/hcrypto/evp-hcrypto.c

@@ -0,0 +1,137 @@
+#define HC_DEPRECATED
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include <evp.h>
+
+#include <krb5-types.h>
+
+#include <aes.h>
+
+/*
+ *
+ */
+
+static int
+aes_init(EVP_CIPHER_CTX *ctx,
+	 const unsigned char * key,
+	 const unsigned char * iv,
+	 int encp)
+{
+    AES_KEY *k = ctx->cipher_data;
+    if (ctx->encrypt)
+	AES_set_encrypt_key(key, ctx->cipher->key_len * 8, k);
+    else
+	AES_set_decrypt_key(key, ctx->cipher->key_len * 8, k);
+    return 1;
+}
+
+static int
+aes_do_cipher(EVP_CIPHER_CTX *ctx,
+	      unsigned char *out,
+	      const unsigned char *in,
+	      unsigned int size)
+{
+    AES_KEY *k = ctx->cipher_data;
+    AES_cbc_encrypt(in, out, size, k, ctx->iv, ctx->encrypt);
+    return 1;
+}
+
+static int
+aes_cleanup(EVP_CIPHER_CTX *ctx)
+{
+    memset(ctx->cipher_data, 0, sizeof(AES_KEY));
+    return 1;
+}
+
+/**
+ * The AES-128 cipher type (hcrypto)
+ *
+ * @return the AES-128 EVP_CIPHER pointer.
+ *
+ * @ingroup hcrypto_evp
+ */
+
+const EVP_CIPHER *
+EVP_hcrypto_aes_128_cbc(void)
+{
+    static const EVP_CIPHER aes_128_cbc = {
+	0,
+	16,
+	16,
+	16,
+	EVP_CIPH_CBC_MODE,
+	aes_init,
+	aes_do_cipher,
+	aes_cleanup,
+	sizeof(AES_KEY),
+	NULL,
+	NULL,
+	NULL,
+	NULL
+    };
+    
+    return &aes_128_cbc;
+}
+
+/**
+ * The AES-128 cipher type (hcrypto)
+ *
+ * @return the AES-128 EVP_CIPHER pointer.
+ *
+ * @ingroup hcrypto_evp
+ */
+
+const EVP_CIPHER *
+EVP_hcrypto_aes_192_cbc(void)
+{
+    static const EVP_CIPHER aes_192_cbc = {
+	0,
+	16,
+	24,
+	16,
+	EVP_CIPH_CBC_MODE,
+	aes_init,
+	aes_do_cipher,
+	aes_cleanup,
+	sizeof(AES_KEY),
+	NULL,
+	NULL,
+	NULL,
+	NULL
+    };
+    return &aes_192_cbc;
+}
+
+/**
+ * The AES-256 cipher type (hcrypto)
+ *
+ * @return the AES-256 EVP_CIPHER pointer.
+ *
+ * @ingroup hcrypto_evp
+ */
+
+const EVP_CIPHER *
+EVP_hcrypto_aes_256_cbc(void)
+{
+    static const EVP_CIPHER aes_256_cbc = {
+	0,
+	16,
+	32,
+	16,
+	EVP_CIPH_CBC_MODE,
+	aes_init,
+	aes_do_cipher,
+	aes_cleanup,
+	sizeof(AES_KEY),
+	NULL,
+	NULL,
+	NULL,
+	NULL
+    };
+    return &aes_256_cbc;
+}