diff options
Diffstat (limited to 'openssl/crypto/rand/rand_lib.c')
| -rw-r--r-- | openssl/crypto/rand/rand_lib.c | 359 |
1 files changed, 176 insertions, 183 deletions
diff --git a/openssl/crypto/rand/rand_lib.c b/openssl/crypto/rand/rand_lib.c index 239a1cde8..88a78d350 100644 --- a/openssl/crypto/rand/rand_lib.c +++ b/openssl/crypto/rand/rand_lib.c @@ -5,21 +5,21 @@ * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. - * + * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * + * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -34,10 +34,10 @@ * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from + * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * + * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE @@ -49,7 +49,7 @@ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. - * + * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence @@ -62,246 +62,239 @@ #include <openssl/rand.h> #ifndef OPENSSL_NO_ENGINE -#include <openssl/engine.h> +# include <openssl/engine.h> #endif #ifdef OPENSSL_FIPS -#include <openssl/fips.h> -#include <openssl/fips_rand.h> -#include "rand_lcl.h" +# include <openssl/fips.h> +# include <openssl/fips_rand.h> +# include "rand_lcl.h" #endif #ifndef OPENSSL_NO_ENGINE /* non-NULL if default_RAND_meth is ENGINE-provided */ -static ENGINE *funct_ref =NULL; +static ENGINE *funct_ref = NULL; #endif static const RAND_METHOD *default_RAND_meth = NULL; int RAND_set_rand_method(const RAND_METHOD *meth) - { +{ #ifndef OPENSSL_NO_ENGINE - if(funct_ref) - { - ENGINE_finish(funct_ref); - funct_ref = NULL; - } + if (funct_ref) { + ENGINE_finish(funct_ref); + funct_ref = NULL; + } #endif - default_RAND_meth = meth; - return 1; - } + default_RAND_meth = meth; + return 1; +} const RAND_METHOD *RAND_get_rand_method(void) - { - if (!default_RAND_meth) - { +{ + if (!default_RAND_meth) { #ifndef OPENSSL_NO_ENGINE - ENGINE *e = ENGINE_get_default_RAND(); - if(e) - { - default_RAND_meth = ENGINE_get_RAND(e); - if(!default_RAND_meth) - { - ENGINE_finish(e); - e = NULL; - } - } - if(e) - funct_ref = e; - else + ENGINE *e = ENGINE_get_default_RAND(); + if (e) { + default_RAND_meth = ENGINE_get_RAND(e); + if (!default_RAND_meth) { + ENGINE_finish(e); + e = NULL; + } + } + if (e) + funct_ref = e; + else #endif - default_RAND_meth = RAND_SSLeay(); - } - return default_RAND_meth; - } + default_RAND_meth = RAND_SSLeay(); + } + return default_RAND_meth; +} #ifndef OPENSSL_NO_ENGINE int RAND_set_rand_engine(ENGINE *engine) - { - const RAND_METHOD *tmp_meth = NULL; - if(engine) - { - if(!ENGINE_init(engine)) - return 0; - tmp_meth = ENGINE_get_RAND(engine); - if(!tmp_meth) - { - ENGINE_finish(engine); - return 0; - } - } - /* This function releases any prior ENGINE so call it first */ - RAND_set_rand_method(tmp_meth); - funct_ref = engine; - return 1; - } +{ + const RAND_METHOD *tmp_meth = NULL; + if (engine) { + if (!ENGINE_init(engine)) + return 0; + tmp_meth = ENGINE_get_RAND(engine); + if (!tmp_meth) { + ENGINE_finish(engine); + return 0; + } + } + /* This function releases any prior ENGINE so call it first */ + RAND_set_rand_method(tmp_meth); + funct_ref = engine; + return 1; +} #endif void RAND_cleanup(void) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->cleanup) - meth->cleanup(); - RAND_set_rand_method(NULL); - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->cleanup) + meth->cleanup(); + RAND_set_rand_method(NULL); +} void RAND_seed(const void *buf, int num) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->seed) - meth->seed(buf,num); - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->seed) + meth->seed(buf, num); +} void RAND_add(const void *buf, int num, double entropy) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->add) - meth->add(buf,num,entropy); - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->add) + meth->add(buf, num, entropy); +} int RAND_bytes(unsigned char *buf, int num) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->bytes) - return meth->bytes(buf,num); - return(-1); - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->bytes) + return meth->bytes(buf, num); + return (-1); +} int RAND_pseudo_bytes(unsigned char *buf, int num) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->pseudorand) - return meth->pseudorand(buf,num); - return(-1); - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->pseudorand) + return meth->pseudorand(buf, num); + return (-1); +} int RAND_status(void) - { - const RAND_METHOD *meth = RAND_get_rand_method(); - if (meth && meth->status) - return meth->status(); - return 0; - } +{ + const RAND_METHOD *meth = RAND_get_rand_method(); + if (meth && meth->status) + return meth->status(); + return 0; +} #ifdef OPENSSL_FIPS -/* FIPS DRBG initialisation code. This sets up the DRBG for use by the - * rest of OpenSSL. +/* + * FIPS DRBG initialisation code. This sets up the DRBG for use by the rest + * of OpenSSL. */ -/* Entropy gatherer: use standard OpenSSL PRNG to seed (this will gather +/* + * Entropy gatherer: use standard OpenSSL PRNG to seed (this will gather * entropy internally through RAND_poll(). */ static size_t drbg_get_entropy(DRBG_CTX *ctx, unsigned char **pout, - int entropy, size_t min_len, size_t max_len) - { - /* Round up request to multiple of block size */ - min_len = ((min_len + 19) / 20) * 20; - *pout = OPENSSL_malloc(min_len); - if (!*pout) - return 0; - if (ssleay_rand_bytes(*pout, min_len, 0, 0) <= 0) - { - OPENSSL_free(*pout); - *pout = NULL; - return 0; - } - return min_len; - } + int entropy, size_t min_len, size_t max_len) +{ + /* Round up request to multiple of block size */ + min_len = ((min_len + 19) / 20) * 20; + *pout = OPENSSL_malloc(min_len); + if (!*pout) + return 0; + if (ssleay_rand_bytes(*pout, min_len, 0, 0) <= 0) { + OPENSSL_free(*pout); + *pout = NULL; + return 0; + } + return min_len; +} static void drbg_free_entropy(DRBG_CTX *ctx, unsigned char *out, size_t olen) - { - if (out) - { - OPENSSL_cleanse(out, olen); - OPENSSL_free(out); - } - } +{ + if (out) { + OPENSSL_cleanse(out, olen); + OPENSSL_free(out); + } +} -/* Set "additional input" when generating random data. This uses the - * current PID, a time value and a counter. +/* + * Set "additional input" when generating random data. This uses the current + * PID, a time value and a counter. */ static size_t drbg_get_adin(DRBG_CTX *ctx, unsigned char **pout) - { - /* Use of static variables is OK as this happens under a lock */ - static unsigned char buf[16]; - static unsigned long counter; - FIPS_get_timevec(buf, &counter); - *pout = buf; - return sizeof(buf); - } +{ + /* Use of static variables is OK as this happens under a lock */ + static unsigned char buf[16]; + static unsigned long counter; + FIPS_get_timevec(buf, &counter); + *pout = buf; + return sizeof(buf); +} -/* RAND_add() and RAND_seed() pass through to OpenSSL PRNG so it is +/* + * RAND_add() and RAND_seed() pass through to OpenSSL PRNG so it is * correctly seeded by RAND_poll(). */ static int drbg_rand_add(DRBG_CTX *ctx, const void *in, int inlen, - double entropy) - { - RAND_SSLeay()->add(in, inlen, entropy); - return 1; - } + double entropy) +{ + RAND_SSLeay()->add(in, inlen, entropy); + return 1; +} static int drbg_rand_seed(DRBG_CTX *ctx, const void *in, int inlen) - { - RAND_SSLeay()->seed(in, inlen); - return 1; - } +{ + RAND_SSLeay()->seed(in, inlen); + return 1; +} -#ifndef OPENSSL_DRBG_DEFAULT_TYPE -#define OPENSSL_DRBG_DEFAULT_TYPE NID_aes_256_ctr -#endif -#ifndef OPENSSL_DRBG_DEFAULT_FLAGS -#define OPENSSL_DRBG_DEFAULT_FLAGS DRBG_FLAG_CTR_USE_DF -#endif +# ifndef OPENSSL_DRBG_DEFAULT_TYPE +# define OPENSSL_DRBG_DEFAULT_TYPE NID_aes_256_ctr +# endif +# ifndef OPENSSL_DRBG_DEFAULT_FLAGS +# define OPENSSL_DRBG_DEFAULT_FLAGS DRBG_FLAG_CTR_USE_DF +# endif static int fips_drbg_type = OPENSSL_DRBG_DEFAULT_TYPE; static int fips_drbg_flags = OPENSSL_DRBG_DEFAULT_FLAGS; void RAND_set_fips_drbg_type(int type, int flags) - { - fips_drbg_type = type; - fips_drbg_flags = flags; - } +{ + fips_drbg_type = type; + fips_drbg_flags = flags; +} int RAND_init_fips(void) - { - DRBG_CTX *dctx; - size_t plen; - unsigned char pers[32], *p; -#ifndef OPENSSL_ALLOW_DUAL_EC_DRBG - if (fips_drbg_type >> 16) - { - RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_DUAL_EC_DRBG_DISABLED); - return 0; - } -#endif - - dctx = FIPS_get_default_drbg(); - if (FIPS_drbg_init(dctx, fips_drbg_type, fips_drbg_flags) <= 0) - { - RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INITIALISING_DRBG); - return 0; - } - - FIPS_drbg_set_callbacks(dctx, - drbg_get_entropy, drbg_free_entropy, 20, - drbg_get_entropy, drbg_free_entropy); - FIPS_drbg_set_rand_callbacks(dctx, drbg_get_adin, 0, - drbg_rand_seed, drbg_rand_add); - /* Personalisation string: a string followed by date time vector */ - strcpy((char *)pers, "OpenSSL DRBG2.0"); - plen = drbg_get_adin(dctx, &p); - memcpy(pers + 16, p, plen); +{ + DRBG_CTX *dctx; + size_t plen; + unsigned char pers[32], *p; +# ifndef OPENSSL_ALLOW_DUAL_EC_DRBG + if (fips_drbg_type >> 16) { + RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_DUAL_EC_DRBG_DISABLED); + return 0; + } +# endif + + dctx = FIPS_get_default_drbg(); + if (FIPS_drbg_init(dctx, fips_drbg_type, fips_drbg_flags) <= 0) { + RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INITIALISING_DRBG); + return 0; + } + + FIPS_drbg_set_callbacks(dctx, + drbg_get_entropy, drbg_free_entropy, 20, + drbg_get_entropy, drbg_free_entropy); + FIPS_drbg_set_rand_callbacks(dctx, drbg_get_adin, 0, + drbg_rand_seed, drbg_rand_add); + /* Personalisation string: a string followed by date time vector */ + strcpy((char *)pers, "OpenSSL DRBG2.0"); + plen = drbg_get_adin(dctx, &p); + memcpy(pers + 16, p, plen); - if (FIPS_drbg_instantiate(dctx, pers, sizeof(pers)) <= 0) - { - RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INSTANTIATING_DRBG); - return 0; - } - FIPS_rand_set_method(FIPS_drbg_method()); - return 1; - } + if (FIPS_drbg_instantiate(dctx, pers, sizeof(pers)) <= 0) { + RANDerr(RAND_F_RAND_INIT_FIPS, RAND_R_ERROR_INSTANTIATING_DRBG); + return 0; + } + FIPS_rand_set_method(FIPS_drbg_method()); + return 1; +} #endif |