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- doc

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- reseting when result fetched
This commit is contained in:
Martin Willi
2005-11-21 18:07:10 +00:00
parent 3e075ba1ed
commit 3e13b35a49
1 changed files with 18 additions and 4 deletions
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Source/charon/transforms/hashers/hasher_sha1.c
+18 -4
View File
@@ -31,7 +31,9 @@
#define BLOCK_SIZE_SHA1 20 #define BLOCK_SIZE_SHA1 20
/*
* ugly macro stuff
*/
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
#if BYTE_ORDER == LITTLE_ENDIAN #if BYTE_ORDER == LITTLE_ENDIAN
@@ -50,6 +52,10 @@
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
/**
* private data structure with hasing context
*/
typedef struct private_hasher_sha1_s private_hasher_sha1_t; typedef struct private_hasher_sha1_s private_hasher_sha1_t;
struct private_hasher_sha1_s { struct private_hasher_sha1_s {
@@ -58,13 +64,17 @@ struct private_hasher_sha1_s {
*/ */
hasher_sha1_t public; hasher_sha1_t public;
/*
* state of the hasher
*/
u_int32_t state[5]; u_int32_t state[5];
u_int32_t count[2]; u_int32_t count[2];
u_int8_t buffer[64]; u_int8_t buffer[64];
}; };
/* Hash a single 512-bit block. This is the core of the algorithm. */ /*
* Hash a single 512-bit block. This is the core of the algorithm. *
*/
void SHA1Transform(u_int32_t state[5], const unsigned char buffer[64]) void SHA1Transform(u_int32_t state[5], const unsigned char buffer[64])
{ {
u_int32_t a, b, c, d, e; u_int32_t a, b, c, d, e;
@@ -113,7 +123,9 @@ void SHA1Transform(u_int32_t state[5], const unsigned char buffer[64])
memset(block, '\0', sizeof(block)); memset(block, '\0', sizeof(block));
} }
/* Run your data through this. */ /*
* Run your data through this.
*/
void SHA1Update(private_hasher_sha1_t* this, u_int8_t *data, u_int32_t len) void SHA1Update(private_hasher_sha1_t* this, u_int8_t *data, u_int32_t len)
{ {
u_int32_t i; u_int32_t i;
@@ -182,6 +194,7 @@ static status_t get_hash(private_hasher_sha1_t *this, chunk_t chunk, u_int8_t *b
if (buffer != NULL) if (buffer != NULL)
{ {
SHA1Final(this, buffer); SHA1Final(this, buffer);
this->public.hasher_interface.reset(&(this->public.hasher_interface));
} }
return SUCCESS; return SUCCESS;
} }
@@ -204,6 +217,7 @@ static status_t allocate_hash(private_hasher_sha1_t *this, chunk_t chunk, chunk_
if (hash != NULL) if (hash != NULL)
{ {
SHA1Final(this, allocated_hash.ptr); SHA1Final(this, allocated_hash.ptr);
this->public.hasher_interface.reset(&(this->public.hasher_interface));
} }
*hash = allocated_hash; *hash = allocated_hash;