/home/dko/projects/mobilec/trunk/src/security/xyssl-0.7/library/sha2.c File Reference

#include <string.h>
#include <stdio.h>
#include "xyssl/sha2.h"

Go to the source code of this file.

Defines

#define _CRT_SECURE_NO_DEPRECATE   1
#define GET_UINT32_BE(n, b, i)
#define PUT_UINT32_BE(n, b, i)
#define SHR(x, n)   ((x & 0xFFFFFFFF) >> n)
#define ROTR(x, n)   (SHR(x,n) | (x << (32 - n)))
#define S0(x)   (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
#define S1(x)   (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
#define S2(x)   (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
#define S3(x)   (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
#define F0(x, y, z)   ((x & y) | (z & (x | y)))
#define F1(x, y, z)   (z ^ (x & (y ^ z)))
#define R(t)
#define P(a, b, c, d, e, f, g, h, x, K)

Functions

void sha2_starts (sha2_context *ctx, int is224)
 SHA-256 context setup.
static void sha2_process (sha2_context *ctx, unsigned char data[64])
void sha2_update (sha2_context *ctx, unsigned char *input, int ilen)
 SHA-256 process buffer.
void sha2_finish (sha2_context *ctx, unsigned char *output)
 SHA-256 final digest.
void sha2 (unsigned char *input, int ilen, unsigned char *output, int is224)
 Output = SHA-256( input buffer ).
int sha2_file (char *path, unsigned char *output, int is224)
 Output = SHA-256( file contents ).
void sha2_hmac_starts (sha2_context *ctx, int is224, unsigned char *key, int keylen)
 SHA-256 HMAC context setup.
void sha2_hmac_update (sha2_context *ctx, unsigned char *input, int ilen)
 SHA-256 HMAC process buffer.
void sha2_hmac_finish (sha2_context *ctx, unsigned char *output)
 SHA-256 HMAC final digest.
void sha2_hmac (unsigned char *key, int keylen, unsigned char *input, int ilen, unsigned char *output, int is224)
 Output = HMAC-SHA-256( hmac key, input buffer ).
int sha2_self_test (int verbose)
 Checkup routine.

Variables

static const unsigned char sha2_padding [64]
static const char _sha2_src [] = "_sha2_src"

Define Documentation

#define _CRT_SECURE_NO_DEPRECATE   1

Definition at line 30 of file sha2.c.

#define F0 ( x,
y,
z   )     ((x & y) | (z & (x | y)))

#define F1 ( x,
y,
z   )     (z ^ (x & (y ^ z)))

#define GET_UINT32_BE ( n,
b,
i   ) 

Value:

{                                                       \
    (n) = ( (unsigned long) (b)[(i)    ] << 24 )        \
        | ( (unsigned long) (b)[(i) + 1] << 16 )        \
        | ( (unsigned long) (b)[(i) + 2] <<  8 )        \
        | ( (unsigned long) (b)[(i) + 3]       );       \
}

Definition at line 42 of file sha2.c.

#define P ( a,
b,
c,
d,
e,
f,
g,
h,
x,
K   ) 

Value:

{                                               \
    temp1 = h + S3(e) + F1(e,f,g) + K + x;      \
    temp2 = S2(a) + F0(a,b,c);                  \
    d += temp1; h = temp1 + temp2;              \
}

#define PUT_UINT32_BE ( n,
b,
i   ) 

Value:

{                                                       \
    (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
    (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
    (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
    (b)[(i) + 3] = (unsigned char) ( (n)       );       \
}

Definition at line 52 of file sha2.c.

#define R ( t   ) 

Value:

(                                               \
    W[t] = S1(W[t -  2]) + W[t -  7] +          \
           S0(W[t - 15]) + W[t - 16]            \
)

#define ROTR ( x,
n   )     (SHR(x,n) | (x << (32 - n)))

#define S0 ( x   )     (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))

Referenced by sha4_process().

#define S1 ( x   )     (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))

Referenced by sha4_process(), and tls1_prf().

#define S2 ( x   )     (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))

Referenced by tls1_prf().

#define S3 ( x   )     (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))

#define SHR ( x,
n   )     ((x & 0xFFFFFFFF) >> n)

Function Documentation

void sha2 ( unsigned char *  input,
int  ilen,
unsigned char *  output,
int  is224 
)

Output = SHA-256( input buffer ).

Parameters:
input buffer holding the data
ilen length of the input data
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224

Definition at line 317 of file sha2.c.

References sha2_finish(), sha2_starts(), and sha2_update().

Referenced by main().

int sha2_file ( char *  path,
unsigned char *  output,
int  is224 
)

Output = SHA-256( file contents ).

Parameters:
path input file name
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224
Returns:
0 if successful, 1 if fopen failed, or 2 if fread failed

Definition at line 332 of file sha2.c.

References f, sha2_finish(), sha2_starts(), and sha2_update().

Referenced by sha2_wrapper().

void sha2_finish ( sha2_context *  ctx,
unsigned char *  output 
)

SHA-256 final digest.

Parameters:
ctx SHA-256 context
output SHA-224/256 checksum result

Definition at line 283 of file sha2.c.

References sha2_context::is224, PUT_UINT32_BE, sha2_padding, sha2_update(), sha2_context::state, and sha2_context::total.

Referenced by main(), sha2(), sha2_file(), and sha2_hmac_finish().

void sha2_hmac ( unsigned char *  key,
int  keylen,
unsigned char *  input,
int  ilen,
unsigned char *  output,
int  is224 
)

Output = HMAC-SHA-256( hmac key, input buffer ).

Parameters:
key HMAC secret key
keylen length of the HMAC key
input buffer holding the data
ilen length of the input data
output HMAC-SHA-224/256 result
is224 0 = use SHA256, 1 = use SHA224

Definition at line 416 of file sha2.c.

References sha2_hmac_finish(), sha2_hmac_starts(), and sha2_hmac_update().

void sha2_hmac_finish ( sha2_context *  ctx,
unsigned char *  output 
)

SHA-256 HMAC final digest.

Parameters:
ctx HMAC context
output SHA-224/256 HMAC checksum result

Definition at line 396 of file sha2.c.

References sha2_context::is224, sha2_context::opad, sha2_finish(), sha2_starts(), and sha2_update().

Referenced by main(), and sha2_hmac().

void sha2_hmac_starts ( sha2_context *  ctx,
int  is224,
unsigned char *  key,
int  keylen 
)

SHA-256 HMAC context setup.

Parameters:
ctx HMAC context to be initialized
is224 0 = use SHA256, 1 = use SHA224
key HMAC secret key
keylen length of the HMAC key

Definition at line 364 of file sha2.c.

References sha2_context::ipad, sha2_context::opad, sha2_starts(), and sha2_update().

Referenced by main(), and sha2_hmac().

void sha2_hmac_update ( sha2_context *  ctx,
unsigned char *  input,
int  ilen 
)

SHA-256 HMAC process buffer.

Parameters:
ctx HMAC context
input buffer holding the data
ilen length of the input data

Definition at line 387 of file sha2.c.

References sha2_update().

Referenced by main(), and sha2_hmac().

static void sha2_process ( sha2_context *  ctx,
unsigned char  data[64] 
) [static]

Definition at line 97 of file sha2.c.

References F, GET_UINT32_BE, P, R, and sha2_context::state.

Referenced by sha2_update().

int sha2_self_test ( int  verbose  ) 

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Definition at line 527 of file sha2.c.

Referenced by main().

void sha2_starts ( sha2_context *  ctx,
int  is224 
)

SHA-256 context setup.

Parameters:
ctx context to be initialized
is224 0 = use SHA256, 1 = use SHA224

Definition at line 64 of file sha2.c.

References sha2_context::is224, sha2_context::state, and sha2_context::total.

Referenced by main(), sha2(), sha2_file(), sha2_hmac_finish(), and sha2_hmac_starts().

void sha2_update ( sha2_context *  ctx,
unsigned char *  input,
int  ilen 
)

SHA-256 process buffer.

Parameters:
ctx SHA-256 context
input buffer holding the data
ilen length of the input data

Definition at line 231 of file sha2.c.

References sha2_context::buffer, sha2_process(), and sha2_context::total.

Referenced by main(), sha2(), sha2_file(), sha2_finish(), sha2_hmac_finish(), sha2_hmac_starts(), and sha2_hmac_update().

Variable Documentation

const char _sha2_src[] = "_sha2_src" [static]

Definition at line 429 of file sha2.c.

const unsigned char sha2_padding[64] [static]

Initial value:

{
 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}

Definition at line 272 of file sha2.c.

Referenced by sha2_finish().

Generated on Tue Jul 1 15:30:02 2008 for Mobile-C by  doxygen 1.5.4