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Avoid bzero/bxopy in favor of more standard library routines.

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Marko Kreen
This commit is contained in:
Tom Lane 2005-07-11 15:40:38 +00:00
parent e997758cb6
commit 067a5cdb35
1 changed files with 27 additions and 32 deletions
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59
contrib/pgcrypto/sha2.c
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@ -33,7 +33,7 @@
*
* $From: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
*
* $PostgreSQL: pgsql/contrib/pgcrypto/sha2.c,v 1.2 2005/07/11 15:07:59 tgl Exp $
* $PostgreSQL: pgsql/contrib/pgcrypto/sha2.c,v 1.3 2005/07/11 15:40:38 tgl Exp $
*/
#include "postgres.h"
@ -42,11 +42,6 @@
#include "sha2.h"
#undef bcopy
#undef bzero
#define bcopy(src, dst, len) memcpy((dst), (src), (len))
#define bzero(ptr, len) memset((ptr), 0, (len))
/*
* UNROLLED TRANSFORM LOOP NOTE:
* You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
@ -281,8 +276,8 @@ SHA256_Init(SHA256_CTX *context)
{
if (context == NULL)
return;
bcopy(sha256_initial_hash_value, context->state, SHA256_DIGEST_LENGTH);
bzero(context->buffer, SHA256_BLOCK_LENGTH);
memcpy(context->state, sha256_initial_hash_value, SHA256_DIGEST_LENGTH);
memset(context->buffer, 0, SHA256_BLOCK_LENGTH);
context->bitcount = 0;
}
@ -466,14 +461,14 @@ SHA256_Update(SHA256_CTX *context, const uint8 *data, size_t len)
if (len >= freespace) {
/* Fill the buffer completely and process it */
bcopy(data, &context->buffer[usedspace], freespace);
memcpy(&context->buffer[usedspace], data, freespace);
context->bitcount += freespace << 3;
len -= freespace;
data += freespace;
SHA256_Transform(context, context->buffer);
} else {
/* The buffer is not yet full */
bcopy(data, &context->buffer[usedspace], len);
memcpy(&context->buffer[usedspace], data, len);
context->bitcount += len << 3;
/* Clean up: */
usedspace = freespace = 0;
@ -489,7 +484,7 @@ SHA256_Update(SHA256_CTX *context, const uint8 *data, size_t len)
}
if (len > 0) {
/* There's left-overs, so save 'em */
bcopy(data, context->buffer, len);
memcpy(context->buffer, data, len);
context->bitcount += len << 3;
}
/* Clean up: */
@ -514,20 +509,20 @@ SHA256_Final(uint8 digest[], SHA256_CTX *context)
if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
/* Set-up for the last transform: */
bzero(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
memset(&context->buffer[usedspace], 0, SHA256_SHORT_BLOCK_LENGTH - usedspace);
} else {
if (usedspace < SHA256_BLOCK_LENGTH) {
bzero(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
memset(&context->buffer[usedspace], 0, SHA256_BLOCK_LENGTH - usedspace);
}
/* Do second-to-last transform: */
SHA256_Transform(context, context->buffer);
/* And set-up for the last transform: */
bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
}
} else {
/* Set-up for the last transform: */
bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH);
/* Begin padding with a 1 bit: */
*context->buffer = 0x80;
@ -547,11 +542,11 @@ SHA256_Final(uint8 digest[], SHA256_CTX *context)
}
}
#endif
bcopy(context->state, digest, SHA256_DIGEST_LENGTH);
memcpy(digest, context->state, SHA256_DIGEST_LENGTH);
}
/* Clean up state data: */
bzero(context, sizeof(*context));
memset(context, 0, sizeof(*context));
usedspace = 0;
}
@ -562,8 +557,8 @@ SHA512_Init(SHA512_CTX *context)
{
if (context == NULL)
return;
bcopy(sha512_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
bzero(context->buffer, SHA512_BLOCK_LENGTH);
memcpy(context->state, sha512_initial_hash_value, SHA512_DIGEST_LENGTH);
memset(context->buffer, 0, SHA512_BLOCK_LENGTH);
context->bitcount[0] = context->bitcount[1] = 0;
}
@ -747,14 +742,14 @@ SHA512_Update(SHA512_CTX *context, const uint8 *data, size_t len)
if (len >= freespace) {
/* Fill the buffer completely and process it */
bcopy(data, &context->buffer[usedspace], freespace);
memcpy(&context->buffer[usedspace], data, freespace);
ADDINC128(context->bitcount, freespace << 3);
len -= freespace;
data += freespace;
SHA512_Transform(context, context->buffer);
} else {
/* The buffer is not yet full */
bcopy(data, &context->buffer[usedspace], len);
memcpy(&context->buffer[usedspace], data, len);
ADDINC128(context->bitcount, len << 3);
/* Clean up: */
usedspace = freespace = 0;
@ -770,7 +765,7 @@ SHA512_Update(SHA512_CTX *context, const uint8 *data, size_t len)
}
if (len > 0) {
/* There's left-overs, so save 'em */
bcopy(data, context->buffer, len);
memcpy(context->buffer, data, len);
ADDINC128(context->bitcount, len << 3);
}
/* Clean up: */
@ -794,20 +789,20 @@ SHA512_Last(SHA512_CTX *context)
if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
/* Set-up for the last transform: */
bzero(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
memset(&context->buffer[usedspace], 0, SHA512_SHORT_BLOCK_LENGTH - usedspace);
} else {
if (usedspace < SHA512_BLOCK_LENGTH) {
bzero(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
memset(&context->buffer[usedspace], 0, SHA512_BLOCK_LENGTH - usedspace);
}
/* Do second-to-last transform: */
SHA512_Transform(context, context->buffer);
/* And set-up for the last transform: */
bzero(context->buffer, SHA512_BLOCK_LENGTH - 2);
memset(context->buffer, 0, SHA512_BLOCK_LENGTH - 2);
}
} else {
/* Prepare for final transform: */
bzero(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
memset(context->buffer, 0, SHA512_SHORT_BLOCK_LENGTH);
/* Begin padding with a 1 bit: */
*context->buffer = 0x80;
@ -837,11 +832,11 @@ SHA512_Final(uint8 digest[], SHA512_CTX *context)
}
}
#endif
bcopy(context->state, digest, SHA512_DIGEST_LENGTH);
memcpy(digest, context->state, SHA512_DIGEST_LENGTH);
}
/* Zero out state data */
bzero(context, sizeof(*context));
memset(context, 0, sizeof(*context));
}
@ -851,8 +846,8 @@ SHA384_Init(SHA384_CTX *context)
{
if (context == NULL)
return;
bcopy(sha384_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
bzero(context->buffer, SHA384_BLOCK_LENGTH);
memcpy(context->state, sha384_initial_hash_value, SHA512_DIGEST_LENGTH);
memset(context->buffer, 0, SHA384_BLOCK_LENGTH);
context->bitcount[0] = context->bitcount[1] = 0;
}
@ -879,9 +874,9 @@ SHA384_Final(uint8 digest[], SHA384_CTX *context)
}
}
#endif
bcopy(context->state, digest, SHA384_DIGEST_LENGTH);
memcpy(digest, context->state, SHA384_DIGEST_LENGTH);
}
/* Zero out state data */
bzero(context, sizeof(*context));
memset(context, 0, sizeof(*context));
}