diff options
author | Richard Levitte <levitte@openssl.org> | 2002-10-04 13:30:57 +0000 |
---|---|---|
committer | Richard Levitte <levitte@openssl.org> | 2002-10-04 13:30:57 +0000 |
commit | 0638ced5cce5cab63d09c96d43a1f6cbe71a0b08 (patch) | |
tree | 24a6b6537b4acee6cf11357d9aa2529ea1e59acb /crypto | |
parent | e984b2af64e7bda295edb5c963e1b8932112230e (diff) |
Add random number generation capability to the cswift engine.
Should this be added to 0.9.6-stable as well?
PR: 275
Diffstat (limited to 'crypto')
-rw-r--r-- | crypto/engine/hw_cswift.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/crypto/engine/hw_cswift.c b/crypto/engine/hw_cswift.c index f5c897bdbb..31b6250dd0 100644 --- a/crypto/engine/hw_cswift.c +++ b/crypto/engine/hw_cswift.c @@ -121,6 +121,10 @@ static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); #endif +/* RAND stuff */ +static int cswift_rand_bytes(unsigned char *buf, int num); +static int cswift_rand_status(void); + /* The definitions for control commands specific to this engine */ #define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE static const ENGINE_CMD_DEFN cswift_cmd_defns[] = { @@ -183,6 +187,18 @@ static DH_METHOD cswift_dh = }; #endif +static RAND_METHOD cswift_random = + { + /* "CryptoSwift RAND method", */ + NULL, + cswift_rand_bytes, + NULL, + NULL, + cswift_rand_bytes, + cswift_rand_status, + }; + + /* Constants used when creating the ENGINE */ static const char *engine_cswift_id = "cswift"; static const char *engine_cswift_name = "CryptoSwift hardware engine support"; @@ -208,7 +224,7 @@ static int bind_helper(ENGINE *e) #ifndef OPENSSL_NO_DH !ENGINE_set_DH(e, &cswift_dh) || #endif - !ENGINE_set_destroy_function(e, cswift_destroy) || + !ENGINE_set_RAND(e, &cswift_random) || !ENGINE_set_init_function(e, cswift_init) || !ENGINE_set_finish_function(e, cswift_finish) || !ENGINE_set_ctrl_function(e, cswift_ctrl) || @@ -905,6 +921,60 @@ static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, } #endif +/* Random bytes are good */ +static int cswift_rand_bytes(unsigned char *buf, int num) +{ + SW_CONTEXT_HANDLE hac; + SW_STATUS swrc; + SW_LARGENUMBER largenum; + size_t nbytes = 0; + int acquired = 0; + int to_return = 0; /* assume failure */ + + if (!get_context(&hac)) + { + CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE); + goto err; + } + acquired = 1; + + while (nbytes < num) + { + /* tell CryptoSwift how many bytes we want and where we want it. + * Note: - CryptoSwift cannot do more than 4096 bytes at a time. + * - CryptoSwift can only do multiple of 32-bits. */ + largenum.value = (SW_BYTE *) buf + nbytes; + if (4096 > num - nbytes) + largenum.nbytes = num - nbytes; + else + largenum.nbytes = 4096; + + swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1); + if (swrc != SW_OK) + { + char tmpbuf[20]; + CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED); + sprintf(tmpbuf, "%ld", swrc); + ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf); + goto err; + } + + nbytes += largenum.nbytes; + } + to_return = 1; /* success */ + +err: + if (acquired) + release_context(hac); + return to_return; +} + +static int cswift_rand_status(void) +{ + return 1; +} + + /* This stuff is needed if this ENGINE is being compiled into a self-contained * shared-library. */ #ifdef ENGINE_DYNAMIC_SUPPORT |