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Add sha1_calculate (takes a filename path)

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This commit is contained in:
twinaphex 2014-12-14 17:55:13 +01:00
parent 7bfa01e2bc
commit 19304cf56a
2 changed files with 44 additions and 6 deletions
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46
hash.c
View File

@ -56,6 +56,7 @@
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include "hash.h"
#include <retro_miscellaneous.h>
#include <retro_endianness.h>
@ -277,7 +278,7 @@ uint32_t crc32_calculate(const uint8_t *data, size_t length)
/* Define the circular shift macro */
#define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32-(bits))))
void SHA1Reset(SHA1Context *context)
static void SHA1Reset(SHA1Context *context)
{
context->Length_Low = 0;
context->Length_High = 0;
@ -424,7 +425,7 @@ static void SHA1PadMessage(SHA1Context *context)
SHA1ProcessMessageBlock(context);
}
int SHA1Result(SHA1Context *context)
static int SHA1Result(SHA1Context *context)
{
if (context->Corrupted)
return 0;
@ -438,7 +439,7 @@ int SHA1Result(SHA1Context *context)
return 1;
}
void SHA1Input( SHA1Context *context,
static void SHA1Input( SHA1Context *context,
const unsigned char *message_array,
unsigned length)
{
@ -474,3 +475,42 @@ void SHA1Input( SHA1Context *context,
message_array++;
}
}
int sha1_calculate(const char *path, char *result)
{
unsigned char buff[4096];
SHA1Context sha;
int rv = 1;
int fd = open(path, O_RDONLY);
if (fd < 0)
goto error;
SHA1Reset(&sha);
do
{
rv = read(fd, buff, 4096);
if (rv < 0)
goto error;
SHA1Input(&sha, buff, rv);
}while(rv);
if (!SHA1Result(&sha))
goto error;
sprintf(result, "%08X%08X%08X%08X%08X",
sha.Message_Digest[0],
sha.Message_Digest[1],
sha.Message_Digest[2],
sha.Message_Digest[3], sha.Message_Digest[4]);
close(fd);
return 0;
error:
if (fd >= 0)
close(fd);
return -1;
}

4
hash.h
View File

@ -85,9 +85,7 @@ typedef struct SHA1Context
int Corrupted; /* Is the message digest corruped? */
} SHA1Context;
void SHA1Reset(SHA1Context *);
int SHA1Result(SHA1Context *);
void SHA1Input( SHA1Context *, const unsigned char *, unsigned);
int sha1_calculate(const char *path, char *result);
#endif