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hmac.h
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1 /*
2  * Copyright (C) 2012 Martin Storsjo
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVUTIL_HMAC_H
22 #define AVUTIL_HMAC_H
23 
24 #include <stdint.h>
25 
26 /**
27  * @defgroup lavu_hmac HMAC
28  * @ingroup lavu_crypto
29  * @{
30  */
31 
32 enum AVHMACType {
39 };
40 
41 typedef struct AVHMAC AVHMAC;
42 
43 /**
44  * Allocate an AVHMAC context.
45  * @param type The hash function used for the HMAC.
46  */
48 
49 /**
50  * Free an AVHMAC context.
51  * @param ctx The context to free, may be NULL
52  */
53 void av_hmac_free(AVHMAC *ctx);
54 
55 /**
56  * Initialize an AVHMAC context with an authentication key.
57  * @param ctx The HMAC context
58  * @param key The authentication key
59  * @param keylen The length of the key, in bytes
60  */
61 void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen);
62 
63 /**
64  * Hash data with the HMAC.
65  * @param ctx The HMAC context
66  * @param data The data to hash
67  * @param len The length of the data, in bytes
68  */
69 void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len);
70 
71 /**
72  * Finish hashing and output the HMAC digest.
73  * @param ctx The HMAC context
74  * @param out The output buffer to write the digest into
75  * @param outlen The length of the out buffer, in bytes
76  * @return The number of bytes written to out, or a negative error code.
77  */
78 int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen);
79 
80 /**
81  * Hash an array of data with a key.
82  * @param ctx The HMAC context
83  * @param data The data to hash
84  * @param len The length of the data, in bytes
85  * @param key The authentication key
86  * @param keylen The length of the key, in bytes
87  * @param out The output buffer to write the digest into
88  * @param outlen The length of the out buffer, in bytes
89  * @return The number of bytes written to out, or a negative error code.
90  */
91 int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len,
92  const uint8_t *key, unsigned int keylen,
93  uint8_t *out, unsigned int outlen);
94 
95 /**
96  * @}
97  */
98 
99 #endif /* AVUTIL_HMAC_H */
int av_hmac_calc(AVHMAC *ctx, 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.
Definition: hmac.c:178
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
AVHMAC * av_hmac_alloc(enum AVHMACType type)
Allocate an AVHMAC context.
Definition: hmac.c:61
AVHMACType
Definition: hmac.h:32
uint8_t
void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len)
Hash data with the HMAC.
Definition: hmac.c:155
Definition: hmac.c:33
void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen)
Initialize an AVHMAC context with an authentication key.
Definition: hmac.c:134
uint8_t key[MAX_BLOCKLEN]
Definition: hmac.c:39
GLint GLenum type
Definition: opengl_enc.c:105
int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen)
Finish hashing and output the HMAC digest.
Definition: hmac.c:160
int keylen
Definition: hmac.c:40
void av_hmac_free(AVHMAC *ctx)
Free an AVHMAC context.
Definition: hmac.c:126
int len
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out