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authorHerbert Xu <herbert@gondor.apana.org.au>2009-07-09 09:27:13 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2009-07-11 06:23:33 -0400
commite2a7ce4e185a94462698cc0e5192495ee3d22a2f (patch)
tree33013f177e48a3b4b191bfccfdb969cf0eeb8dbb
parent8267adab9433593adb09d94626475c2a5921f111 (diff)
crypto: sha1_generic - Add export/import support
This patch adds export/import support to sha1_generic. The exported type is defined by struct sha1_state, which is basically the entire descriptor state of sha1_generic. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/sha1_generic.c41
-rw-r--r--include/crypto/sha.h8
2 files changed, 33 insertions, 16 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c
index 9efef20454cb..0416091bf45a 100644
--- a/crypto/sha1_generic.c
+++ b/crypto/sha1_generic.c
@@ -25,31 +25,21 @@
25#include <crypto/sha.h> 25#include <crypto/sha.h>
26#include <asm/byteorder.h> 26#include <asm/byteorder.h>
27 27
28struct sha1_ctx {
29 u64 count;
30 u32 state[5];
31 u8 buffer[64];
32};
33
34static int sha1_init(struct shash_desc *desc) 28static int sha1_init(struct shash_desc *desc)
35{ 29{
36 struct sha1_ctx *sctx = shash_desc_ctx(desc); 30 struct sha1_state *sctx = shash_desc_ctx(desc);
37 31
38 static const struct sha1_ctx initstate = { 32 *sctx = (struct sha1_state){
39 0, 33 .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
40 { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
41 { 0, }
42 }; 34 };
43 35
44 *sctx = initstate;
45
46 return 0; 36 return 0;
47} 37}
48 38
49static int sha1_update(struct shash_desc *desc, const u8 *data, 39static int sha1_update(struct shash_desc *desc, const u8 *data,
50 unsigned int len) 40 unsigned int len)
51{ 41{
52 struct sha1_ctx *sctx = shash_desc_ctx(desc); 42 struct sha1_state *sctx = shash_desc_ctx(desc);
53 unsigned int partial, done; 43 unsigned int partial, done;
54 const u8 *src; 44 const u8 *src;
55 45
@@ -85,7 +75,7 @@ static int sha1_update(struct shash_desc *desc, const u8 *data,
85/* Add padding and return the message digest. */ 75/* Add padding and return the message digest. */
86static int sha1_final(struct shash_desc *desc, u8 *out) 76static int sha1_final(struct shash_desc *desc, u8 *out)
87{ 77{
88 struct sha1_ctx *sctx = shash_desc_ctx(desc); 78 struct sha1_state *sctx = shash_desc_ctx(desc);
89 __be32 *dst = (__be32 *)out; 79 __be32 *dst = (__be32 *)out;
90 u32 i, index, padlen; 80 u32 i, index, padlen;
91 __be64 bits; 81 __be64 bits;
@@ -111,12 +101,31 @@ static int sha1_final(struct shash_desc *desc, u8 *out)
111 return 0; 101 return 0;
112} 102}
113 103
104static int sha1_export(struct shash_desc *desc, void *out)
105{
106 struct sha1_state *sctx = shash_desc_ctx(desc);
107
108 memcpy(out, sctx, sizeof(*sctx));
109 return 0;
110}
111
112static int sha1_import(struct shash_desc *desc, const void *in)
113{
114 struct sha1_state *sctx = shash_desc_ctx(desc);
115
116 memcpy(sctx, in, sizeof(*sctx));
117 return 0;
118}
119
114static struct shash_alg alg = { 120static struct shash_alg alg = {
115 .digestsize = SHA1_DIGEST_SIZE, 121 .digestsize = SHA1_DIGEST_SIZE,
116 .init = sha1_init, 122 .init = sha1_init,
117 .update = sha1_update, 123 .update = sha1_update,
118 .final = sha1_final, 124 .final = sha1_final,
119 .descsize = sizeof(struct sha1_ctx), 125 .export = sha1_export,
126 .import = sha1_import,
127 .descsize = sizeof(struct sha1_state),
128 .statesize = sizeof(struct sha1_state),
120 .base = { 129 .base = {
121 .cra_name = "sha1", 130 .cra_name = "sha1",
122 .cra_driver_name= "sha1-generic", 131 .cra_driver_name= "sha1-generic",
diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index c0ccc2b1a2d8..922a248bd04d 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -5,6 +5,8 @@
5#ifndef _CRYPTO_SHA_H 5#ifndef _CRYPTO_SHA_H
6#define _CRYPTO_SHA_H 6#define _CRYPTO_SHA_H
7 7
8#include <linux/types.h>
9
8#define SHA1_DIGEST_SIZE 20 10#define SHA1_DIGEST_SIZE 20
9#define SHA1_BLOCK_SIZE 64 11#define SHA1_BLOCK_SIZE 64
10 12
@@ -62,4 +64,10 @@
62#define SHA512_H6 0x1f83d9abfb41bd6bULL 64#define SHA512_H6 0x1f83d9abfb41bd6bULL
63#define SHA512_H7 0x5be0cd19137e2179ULL 65#define SHA512_H7 0x5be0cd19137e2179ULL
64 66
67struct sha1_state {
68 u64 count;
69 u32 state[SHA1_DIGEST_SIZE / 4];
70 u8 buffer[SHA1_BLOCK_SIZE];
71};
72
65#endif 73#endif