gcm.c File Reference

#include <openssl/base.h>
#include <assert.h>
#include <string.h>
#include <openssl/mem.h>
#include <openssl/cpu.h>
#include "internal.h"
#include "../internal.h"

Macros
#define	PACK(s)   ((size_t)(s) << (sizeof(size_t) * 8 - 16))
#define	REDUCE1BIT(V)
#define	GCM_MUL(ctx, Xi)   gcm_gmult_4bit((ctx)->Xi.u, (ctx)->Htable)

Functions
void	CRYPTO_gcm128_init (GCM128_CONTEXT *ctx, const void *key, block128_f block)
void	CRYPTO_gcm128_setiv (GCM128_CONTEXT *ctx, const void *key, const uint8_t *iv, size_t len)
int	CRYPTO_gcm128_aad (GCM128_CONTEXT *ctx, const uint8_t *aad, size_t len)
int	CRYPTO_gcm128_encrypt (GCM128_CONTEXT *ctx, const void *key, const unsigned char *in, unsigned char *out, size_t len)
int	CRYPTO_gcm128_decrypt (GCM128_CONTEXT *ctx, const void *key, const unsigned char *in, unsigned char *out, size_t len)
int	CRYPTO_gcm128_encrypt_ctr32 (GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len, ctr128_f stream)
int	CRYPTO_gcm128_decrypt_ctr32 (GCM128_CONTEXT *ctx, const void *key, const uint8_t *in, uint8_t *out, size_t len, ctr128_f stream)
int	CRYPTO_gcm128_finish (GCM128_CONTEXT *ctx, const uint8_t *tag, size_t len)
void	CRYPTO_gcm128_tag (GCM128_CONTEXT *ctx, unsigned char *tag, size_t len)

Macro Definition Documentation

GCM_MUL

#define GCM_MUL	(		ctx,
			Xi
	)		gcm_gmult_4bit((ctx)->Xi.u, (ctx)->Htable)

PACK

#define PACK

(

s

)

((size_t)(s) << (sizeof(size_t) * 8 - 16))

REDUCE1BIT

#define REDUCE1BIT

(

V

)

Value:

do {                                                                \
    if (sizeof(size_t) == 8) {                                        \
      uint64_t T = UINT64_C(0xe100000000000000) & (0 - ((V).lo & 1)); \
      (V).lo = ((V).hi << 63) | ((V).lo >> 1);                        \
      (V).hi = ((V).hi >> 1) ^ T;                                     \
    } else {                                                          \
      uint32_t T = 0xe1000000U & (0 - (uint32_t)((V).lo & 1));        \
      (V).lo = ((V).hi << 63) | ((V).lo >> 1);                        \
      (V).hi = ((V).hi >> 1) ^ ((uint64_t)T << 32);                   \
    }                                                                 \
  } while (0)

Function Documentation

CRYPTO_gcm128_aad()

int CRYPTO_gcm128_aad	(	GCM128_CONTEXT *	ctx,
		const uint8_t *	aad,
		size_t	len
	)

CRYPTO_gcm128_decrypt()

int CRYPTO_gcm128_decrypt	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		const unsigned char *	in,
		unsigned char *	out,
		size_t	len
	)

CRYPTO_gcm128_decrypt_ctr32()

int CRYPTO_gcm128_decrypt_ctr32	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		const uint8_t *	in,
		uint8_t *	out,
		size_t	len,
		ctr128_f	stream
	)

CRYPTO_gcm128_encrypt()

int CRYPTO_gcm128_encrypt	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		const unsigned char *	in,
		unsigned char *	out,
		size_t	len
	)

CRYPTO_gcm128_encrypt_ctr32()

int CRYPTO_gcm128_encrypt_ctr32	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		const uint8_t *	in,
		uint8_t *	out,
		size_t	len,
		ctr128_f	stream
	)

CRYPTO_gcm128_finish()

int CRYPTO_gcm128_finish	(	GCM128_CONTEXT *	ctx,
		const uint8_t *	tag,
		size_t	len
	)

CRYPTO_gcm128_init()

void CRYPTO_gcm128_init	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		block128_f	block
	)

CRYPTO_gcm128_setiv()

void CRYPTO_gcm128_setiv	(	GCM128_CONTEXT *	ctx,
		const void *	key,
		const uint8_t *	iv,
		size_t	len
	)

CRYPTO_gcm128_tag()

void CRYPTO_gcm128_tag	(	GCM128_CONTEXT *	ctx,
		unsigned char *	tag,
		size_t	len
	)