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Add support for salt & personalization to Blake2.

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This API might change. I'm not a big fan of what we have now.
This commit is contained in:
Frank Denis 2013-11-05 21:46:19 -08:00
parent a586df583a
commit e9c46aef5f
5 changed files with 132 additions and 6 deletions
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10
src/libsodium/crypto_generichash/blake2/generichash_blake2_api.c
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@ -25,6 +25,16 @@ crypto_generichash_blake2b_blockbytes(void) {
return crypto_generichash_blake2b_BLOCKBYTES;
}
size_t
crypto_generichash_blake2b_salt_bytes(void) {
return crypto_generichash_blake2b_SALTBYTES;
}
size_t
crypto_generichash_blake2b_personal_bytes(void) {
return crypto_generichash_blake2b_PERSONALBYTES;
}
const char *
crypto_generichash_blake2b_blockbytes_primitive(void) {
return "blake2b";

18
src/libsodium/crypto_generichash/blake2/ref/blake2.h
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@ -19,12 +19,14 @@
#include "crypto_generichash_blake2b.h"
#define blake2b_init_param crypto_generichash_blake2b__init_param
#define blake2b_init crypto_generichash_blake2b__init
#define blake2b_init_key crypto_generichash_blake2b__init_key
#define blake2b_update crypto_generichash_blake2b__update
#define blake2b_final crypto_generichash_blake2b__final
#define blake2b crypto_generichash_blake2b__blake2b
#define blake2b_init_param crypto_generichash_blake2b__init_param
#define blake2b_init crypto_generichash_blake2b__init
#define blake2b_init_salt_personal crypto_generichash_blake2b__init_salt_personal
#define blake2b_init_key crypto_generichash_blake2b__init_key
#define blake2b_init_key_salt_personal crypto_generichash_blake2b__init_key_salt_personal
#define blake2b_update crypto_generichash_blake2b__update
#define blake2b_final crypto_generichash_blake2b__final
#define blake2b crypto_generichash_blake2b__blake2b
#if defined(_MSC_VER)
#define ALIGN(x) __declspec(align(x))
@ -134,7 +136,11 @@ typedef crypto_generichash_blake2b_state blake2b_state;
int blake2s_final( blake2s_state *S, uint8_t *out, uint8_t outlen );
int blake2b_init( blake2b_state *S, const uint8_t outlen );
int blake2b_init_salt_personal( blake2b_state *S, const uint8_t outlen,
const void *personal, const void *salt );
int blake2b_init_key( blake2b_state *S, const uint8_t outlen, const void *key, const uint8_t keylen );
int blake2b_init_key_salt_personal( blake2b_state *S, const uint8_t outlen, const void *key, const uint8_t keylen,
const void *salt, const void *personal );
int blake2b_init_param( blake2b_state *S, const blake2b_param *P );
int blake2b_update( blake2b_state *S, const uint8_t *in, uint64_t inlen );
int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen );

69
src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c
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@ -184,6 +184,34 @@ int blake2b_init( blake2b_state *S, const uint8_t outlen )
return blake2b_init_param( S, P );
}
int blake2b_init_salt_personal( blake2b_state *S, const uint8_t outlen,
const void *salt, const void *personal)
{
blake2b_param P[1];
if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;
P->digest_length = outlen;
P->key_length = 0;
P->fanout = 1;
P->depth = 1;
store32( &P->leaf_length, 0 );
store64( &P->node_offset, 0 );
P->node_depth = 0;
P->inner_length = 0;
memset( P->reserved, 0, sizeof( P->reserved ) );
if (salt != NULL) {
blake2b_param_set_salt( P, salt );
} else {
memset( P->salt, 0, sizeof( P->salt ) );
}
if (personal != NULL) {
blake2b_param_set_personal( P, personal );
} else {
memset( P->personal, 0, sizeof( P->personal ) );
}
return blake2b_init_param( S, P );
}
int blake2b_init_key( blake2b_state *S, const uint8_t outlen, const void *key, const uint8_t keylen )
{
@ -217,6 +245,47 @@ int blake2b_init_key( blake2b_state *S, const uint8_t outlen, const void *key, c
return 0;
}
int blake2b_init_key_salt_personal( blake2b_state *S, const uint8_t outlen, const void *key, const uint8_t keylen,
const void *salt, const void *personal )
{
blake2b_param P[1];
if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;
if ( !key || !keylen || keylen > BLAKE2B_KEYBYTES ) return -1;
P->digest_length = outlen;
P->key_length = keylen;
P->fanout = 1;
P->depth = 1;
store32( &P->leaf_length, 0 );
store64( &P->node_offset, 0 );
P->node_depth = 0;
P->inner_length = 0;
memset( P->reserved, 0, sizeof( P->reserved ) );
if (salt != NULL) {
blake2b_param_set_salt( P, salt );
} else {
memset( P->salt, 0, sizeof( P->salt ) );
}
if (personal != NULL) {
blake2b_param_set_personal( P, personal );
} else {
memset( P->personal, 0, sizeof( P->personal ) );
}
if( blake2b_init_param( S, P ) < 0 ) return -1;
{
uint8_t block[BLAKE2B_BLOCKBYTES];
memset( block, 0, BLAKE2B_BLOCKBYTES );
memcpy( block, key, keylen );
blake2b_update( S, block, BLAKE2B_BLOCKBYTES );
secure_zero_memory( block, BLAKE2B_BLOCKBYTES ); /* Burn the key from stack */
}
return 0;
}
static int blake2b_compress( blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES] )
{
uint64_t m[16];

26
src/libsodium/crypto_generichash/blake2/ref/generichash_blake2b.c
View File

@ -43,6 +43,32 @@ crypto_generichash_blake2b_init(crypto_generichash_blake2b_state *state,
return 0;
}
int
crypto_generichash_blake2b_init2(crypto_generichash_blake2b_state *state,
const unsigned char *key,
const size_t keylen, const size_t outlen,
const unsigned char *salt,
const unsigned char *personal)
{
if (outlen <= 0U || outlen > BLAKE2B_OUTBYTES ||
keylen > BLAKE2B_KEYBYTES) {
return -1;
}
assert(outlen <= UINT8_MAX);
assert(keylen <= UINT8_MAX);
if (key == NULL || keylen <= 0U) {
if (blake2b_init_salt_personal(state, (uint8_t) outlen,
salt, personal) != 0) {
return -1;
}
} else if (blake2b_init_key_salt_personal(state,
(uint8_t) outlen, key, keylen,
salt, personal) != 0) {
return -1;
}
return 0;
}
int
crypto_generichash_blake2b_update(crypto_generichash_blake2b_state *state,
const unsigned char *in,

15
src/libsodium/include/sodium/crypto_generichash_blake2b.h
View File

@ -14,6 +14,8 @@
#define crypto_generichash_blake2b_KEYBYTES_MIN 16U
#define crypto_generichash_blake2b_KEYBYTES_MAX 64U
#define crypto_generichash_blake2b_BLOCKBYTES 128U
#define crypto_generichash_blake2b_SALTBYTES 16U
#define crypto_generichash_blake2b_PERSONALBYTES 16U
#if defined(_MSC_VER)
# define CRYPTO_ALIGN(x) __declspec(align(x))
@ -51,6 +53,12 @@ size_t crypto_generichash_blake2b_keybytes_max(void);
SODIUM_EXPORT
size_t crypto_generichash_blake2b_blockbytes(void);
SODIUM_EXPORT
size_t crypto_generichash_blake2b_saltbytes(void);
SODIUM_EXPORT
size_t crypto_generichash_blake2b_personalbytes(void);
SODIUM_EXPORT
const char * crypto_generichash_blake2b_blockbytes_primitive(void);
@ -65,6 +73,13 @@ int crypto_generichash_blake2b_init(crypto_generichash_blake2b_state *state,
const unsigned char *key,
const size_t keylen, const size_t outlen);
SODIUM_EXPORT
int crypto_generichash_blake2b_init2(crypto_generichash_blake2b_state *state,
const unsigned char *key,
const size_t keylen, const size_t outlen,
const unsigned char *salt,
const unsigned char *personal);
SODIUM_EXPORT
int crypto_generichash_blake2b_update(crypto_generichash_blake2b_state *state,
const unsigned char *in,