crypto: rng - RNG interface and implementation

[net-next-2.6.git] / include / linux / crypto.h

diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 81d994a3bdaf1395db837a4ce2454ae733cc12c2..3d2317e4af2e4b4475c2fc18ff1db3b475ae1d52 100644 (file)
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -38,6 +38,7 @@
 #define CRYPTO_ALG_TYPE_DIGEST         0x00000008
 #define CRYPTO_ALG_TYPE_HASH           0x00000009
 #define CRYPTO_ALG_TYPE_AHASH          0x0000000a
+#define CRYPTO_ALG_TYPE_RNG            0x0000000c
 
 #define CRYPTO_ALG_TYPE_HASH_MASK      0x0000000e
 #define CRYPTO_ALG_TYPE_AHASH_MASK     0x0000000c
@@ -113,6 +114,7 @@ struct crypto_aead;
 struct crypto_blkcipher;
 struct crypto_hash;
 struct crypto_ahash;
+struct crypto_rng;
 struct crypto_tfm;
 struct crypto_type;
 struct aead_givcrypt_request;
@@ -298,6 +300,15 @@ struct compress_alg {
                              unsigned int slen, u8 *dst, unsigned int *dlen);
 };
 
+struct rng_alg {
+       int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata,
+                              unsigned int dlen);
+       int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
+
+       unsigned int seedsize;
+};
+
+
 #define cra_ablkcipher cra_u.ablkcipher
 #define cra_aead       cra_u.aead
 #define cra_blkcipher  cra_u.blkcipher
@@ -306,6 +317,7 @@ struct compress_alg {
 #define cra_hash       cra_u.hash
 #define cra_ahash      cra_u.ahash
 #define cra_compress   cra_u.compress
+#define cra_rng                cra_u.rng
 
 struct crypto_alg {
        struct list_head cra_list;
@@ -333,6 +345,7 @@ struct crypto_alg {
                struct hash_alg hash;
                struct ahash_alg ahash;
                struct compress_alg compress;
+               struct rng_alg rng;
        } cra_u;
 
        int (*cra_init)(struct crypto_tfm *tfm);
@@ -438,6 +451,12 @@ struct compress_tfm {
                              u8 *dst, unsigned int *dlen);
 };
 
+struct rng_tfm {
+       int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata,
+                             unsigned int dlen);
+       int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
+};
+
 #define crt_ablkcipher crt_u.ablkcipher
 #define crt_aead       crt_u.aead
 #define crt_blkcipher  crt_u.blkcipher
@@ -445,6 +464,7 @@ struct compress_tfm {
 #define crt_hash       crt_u.hash
 #define crt_ahash      crt_u.ahash
 #define crt_compress   crt_u.compress
+#define crt_rng                crt_u.rng
 
 struct crypto_tfm {
 
@@ -458,6 +478,7 @@ struct crypto_tfm {
                struct hash_tfm hash;
                struct ahash_tfm ahash;
                struct compress_tfm compress;
+               struct rng_tfm rng;
        } crt_u;
        
        struct crypto_alg *__crt_alg;
@@ -489,6 +510,10 @@ struct crypto_hash {
        struct crypto_tfm base;
 };
 
+struct crypto_rng {
+       struct crypto_tfm base;
+};
+
 enum {
        CRYPTOA_UNSPEC,
        CRYPTOA_ALG,