diff options
Diffstat (limited to 'include/crypto/poly1305.h')
| -rw-r--r-- | include/crypto/poly1305.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/include/crypto/poly1305.h b/include/crypto/poly1305.h index 74c6e1cd73ee..f1f67fc749cf 100644 --- a/include/crypto/poly1305.h +++ b/include/crypto/poly1305.h @@ -13,12 +13,29 @@ #define POLY1305_KEY_SIZE 32 #define POLY1305_DIGEST_SIZE 16 +/* The poly1305_key and poly1305_state types are mostly opaque and + * implementation-defined. Limbs might be in base 2^64 or base 2^26, or + * different yet. The union type provided keeps these 64-bit aligned for the + * case in which this is implemented using 64x64 multiplies. + */ + struct poly1305_key { - u32 r[5]; /* key, base 2^26 */ + union { + u32 r[5]; + u64 r64[3]; + }; +}; + +struct poly1305_core_key { + struct poly1305_key key; + struct poly1305_key precomputed_s; }; struct poly1305_state { - u32 h[5]; /* accumulator, base 2^26 */ + union { + u32 h[5]; + u64 h64[3]; + }; }; struct poly1305_desc_ctx { @@ -35,7 +52,10 @@ struct poly1305_desc_ctx { /* accumulator */ struct poly1305_state h; /* key */ - struct poly1305_key r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE]; + union { + struct poly1305_key opaque_r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE]; + struct poly1305_core_key core_r; + }; }; void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key); |