sha1.h File Reference

Go to the source code of this file.

Data Structures
struct	SHA1_CTX

Macros
#define	SHA1_BLOCK_LENGTH   64
#define	SHA1_DIGEST_LENGTH   20

Functions
void	SHA1Init (SHA1_CTX *context)
void	SHA1Transform (uint32_t state[5], const unsigned char buffer[64])
void	SHA1Update (SHA1_CTX *context, const void *data, unsigned int len)
void	SHA1Final (unsigned char digest[20], SHA1_CTX *context)

Macro Definition Documentation

SHA1_BLOCK_LENGTH

#define SHA1_BLOCK_LENGTH   64

Definition at line 16 of file sha1.h.

SHA1_DIGEST_LENGTH

#define SHA1_DIGEST_LENGTH   20

Definition at line 17 of file sha1.h.

Function Documentation

SHA1Final()

void SHA1Final	(	unsigned char	digest[20],
		SHA1_CTX *	context
	)

SHA1Init()

void SHA1Init

(

SHA1_CTX *

context

)

Definition at line 186 of file sha1.c.

                                 {
  /* SHA1 initialization constants */
  context->count = 0;
  context->state[0] = 0x67452301;
  context->state[1] = 0xEFCDAB89;
  context->state[2] = 0x98BADCFE;
  context->state[3] = 0x10325476;
  context->state[4] = 0xC3D2E1F0;
}

References SHA1_CTX::count, and SHA1_CTX::state.

SHA1Transform()

void SHA1Transform	(	uint32_t	state[5],
		const unsigned char	buffer[64]
	)

SHA1Update()

void SHA1Update	(	SHA1_CTX *	context,
		const void *	data,
		unsigned int	len
	)

Definition at line 198 of file sha1.c.

                                                                          {
  const uint8_t *data = dataptr;
  unsigned int i;
  unsigned int j;
 
  j = (uint32_t)((context->count >> 3) & 63);
  context->count += (len << 3);
  if ((j + len) > 63) {
    memcpy(&context->buffer[j], data, (i = 64 - j));
    SHA1Transform(context->state, context->buffer);
    for (; i + 63 < len; i += 64) {
      SHA1Transform(context->state, &data[i]);
    }
    j = 0;
  } else
    i = 0;
  memcpy(&context->buffer[j], &data[i], len - i);
}

References SHA1_CTX::buffer, SHA1_CTX::count, SHA1Transform(), and SHA1_CTX::state.

Referenced by SHA1Final().