33 #define MAX_HASHLEN 64 34 #define MAX_BLOCKLEN 128 37 #if FF_API_CRYPTO_SIZE_T 54 #define DEFINE_SHA(bits) \ 55 static av_cold void sha ## bits ##_init(void *ctx) \ 57 av_sha_init(ctx, bits); \ 60 #define DEFINE_SHA512(bits) \ 61 static av_cold void sha ## bits ##_init(void *ctx) \ 63 av_sha512_init(ctx, bits); \ 89 c->
init = sha160_init;
97 c->
init = sha224_init;
105 c->
init = sha256_init;
113 c->
init = sha384_init;
121 c->
init = sha512_init;
155 memcpy(c->
key, key, keylen);
159 for (i = 0; i < c->
keylen; i++)
160 block[i] = c->
key[i] ^ 0x36;
179 for (i = 0; i < c->
keylen; i++)
180 block[i] = c->
key[i] ^ 0x5C;
void av_sha_final(AVSHA *ctx, uint8_t *digest)
Finish hashing and output digest value.
int av_hmac_calc(AVHMAC *c, const uint8_t *data, unsigned int len, const uint8_t *key, unsigned int keylen, uint8_t *out, unsigned int outlen)
Hash an array of data with a key.
ptrdiff_t const GLvoid * data
AVHMAC * av_hmac_alloc(enum AVHMACType type)
Allocate an AVHMAC context.
Memory handling functions.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
void av_md5_update(AVMD5 *ctx, const uint8_t *src, int len)
Update hash value.
Macro definitions for various function/variable attributes.
void(* hmac_init)(void *ctx)
struct AVMD5 * av_md5_alloc(void)
Allocate an AVMD5 context.
The exact code depends on how similar the blocks are and how related they are to the block
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
void av_hmac_update(AVHMAC *c, const uint8_t *data, unsigned int len)
Hash data with the HMAC.
struct AVSHA512 * av_sha512_alloc(void)
Allocate an AVSHA512 context.
Libavutil version macros.
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void av_sha_update(struct AVSHA *ctx, const uint8_t *data, unsigned int len)
Update hash value.
void av_hmac_init(AVHMAC *c, const uint8_t *key, unsigned int keylen)
Initialize an AVHMAC context with an authentication key.
uint8_t key[MAX_BLOCKLEN]
void(* hmac_final)(void *ctx, uint8_t *dst)
void av_sha512_update(AVSHA512 *ctx, const uint8_t *data, unsigned int len)
Update hash value.
Public header for SHA-1 & SHA-256 hash function implementations.
struct AVSHA * av_sha_alloc(void)
Allocate an AVSHA context.
void av_md5_init(AVMD5 *ctx)
Initialize MD5 hashing.
void av_md5_final(AVMD5 *ctx, uint8_t *dst)
Finish hashing and output digest value.
int av_hmac_final(AVHMAC *c, uint8_t *out, unsigned int outlen)
Finish hashing and output the HMAC digest.
Public header for SHA-512 implementation.
#define DEFINE_SHA512(bits)
void av_hmac_free(AVHMAC *c)
Free an AVHMAC context.
void av_sha512_final(AVSHA512 *ctx, uint8_t *digest)
Finish hashing and output digest value.
Public header for MD5 hash function implementation.
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
void(* hmac_update)(void *ctx, const uint8_t *src, int len)