37 #if !FF_API_CRYPTO_CONTEXT 52 for (i = 0; i < 4; i++)
60 for (i = 0; i < 4; i++)
74 uint32_t
delta = 0x9E3779B9, sum = delta * 32;
76 for (i = 0; i < 32; i++) {
77 v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
79 v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
87 uint32_t sum = 0,
delta = 0x9E3779B9;
89 for (i = 0; i < 32; i++) {
90 v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
92 v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
110 uint32_t
delta = 0x9E3779B9, sum = delta * 32;
112 for (i = 0; i < 32; i++) {
113 v1 -= (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
115 v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
123 uint32_t sum = 0,
delta = 0x9E3779B9;
125 for (i = 0; i < 32; i++) {
126 v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
128 v1 += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
144 crypt(ctx, dst, src, decrypt, iv);
152 for (i = 0; i < 8; i++)
153 dst[i] = src[i] ^ iv[i];
memory handling functions
static const uint8_t crypt[]
void av_xtea_crypt(AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context, in big endian format...
static void xtea_crypt(AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt, void(*crypt)(AVXTEA *, uint8_t *, const uint8_t *, int, uint8_t *))
static void xtea_crypt_ecb(AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int decrypt, uint8_t *iv)
void av_xtea_init(AVXTEA *ctx, const uint8_t key[16])
Initialize an AVXTEA context.
Public header for libavutil XTEA algorithm.
static void xtea_le_crypt_ecb(AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int decrypt, uint8_t *iv)
void av_xtea_le_init(AVXTEA *ctx, const uint8_t key[16])
Initialize an AVXTEA context.
common internal and external API header
void av_xtea_le_crypt(AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context, in little endian format...
AVXTEA * av_xtea_alloc(void)
Allocate an AVXTEA context.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...