diff options
author | Mamadou DIOP <bossiel@yahoo.fr> | 2015-08-17 01:56:35 +0200 |
---|---|---|
committer | Mamadou DIOP <bossiel@yahoo.fr> | 2015-08-17 01:56:35 +0200 |
commit | 631fffee8a28b1bec5ed1f1d26a20e0135967f99 (patch) | |
tree | 74afe3bf3efe15aa82bcd0272b2b0f4d48c2d837 /thirdparties/wince/include/srtp/prng.h | |
parent | 7908865936604036e6f200f1b5e069f8752f3a3a (diff) | |
download | doubango-631fffee8a28b1bec5ed1f1d26a20e0135967f99.zip doubango-631fffee8a28b1bec5ed1f1d26a20e0135967f99.tar.gz |
-
Diffstat (limited to 'thirdparties/wince/include/srtp/prng.h')
-rw-r--r-- | thirdparties/wince/include/srtp/prng.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/thirdparties/wince/include/srtp/prng.h b/thirdparties/wince/include/srtp/prng.h new file mode 100644 index 0000000..c493383 --- /dev/null +++ b/thirdparties/wince/include/srtp/prng.h @@ -0,0 +1,59 @@ +/* + * prng.h + * + * pseudorandom source + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +#ifndef PRNG_H +#define PRNG_H + +#include "rand_source.h" /* for rand_source_func_t definition */ +#include "aes.h" /* for aes */ +//FIXME: this is temporary until we pull in the code to use OpenSSL for RNG +#ifdef OPENSSL +#include "aes_icm_ossl.h" /* for aes ctr */ +#else +#include "aes_icm.h" /* for aes ctr */ +#endif + +#define MAX_PRNG_OUT_LEN 0xffffffffU + +/* + * x917_prng is an ANSI X9.17-like AES-based PRNG + */ + +typedef struct { + v128_t state; /* state data */ + aes_expanded_key_t key; /* secret key */ + uint32_t octet_count; /* number of octets output since last init */ + rand_source_func_t rand; /* random source for re-initialization */ +} x917_prng_t; + +err_status_t +x917_prng_init(rand_source_func_t random_source); + +err_status_t +x917_prng_get_octet_string(uint8_t *dest, uint32_t len); + + +/* + * ctr_prng is an AES-CTR based PRNG + */ + +typedef struct { + uint32_t octet_count; /* number of octets output since last init */ + aes_icm_ctx_t state; /* state data */ + rand_source_func_t rand; /* random source for re-initialization */ +} ctr_prng_t; + +err_status_t +ctr_prng_init(rand_source_func_t random_source); + +err_status_t +ctr_prng_get_octet_string(void *dest, uint32_t len); + + +#endif |