New function BN_pseudo_rand().
Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when
generating DSA primes (why not use BN_is_prime()?)
OpenSSL CHANGES
_______________
- Changes between 0.9.4 and 0.9.5 [xx XXX 1999]
+ Changes between 0.9.4 and 0.9.5 [xx XXX 2000]
+
+ *) Use BN_prime_checks_size(BN_num_bits(w)) rounds of Miller-Rabin when
+ generating DSA primes.
+ [Ulf Möller]
+
+ *) New function BN_pseudo_rand().
+ [Ulf Möller]
*) Clean up BN_mod_mul_montgomery(): replace the broken (and unreadable)
bignum version of BN_from_montgomery() with the working code from
#define BN_prime_checks 0 /* default: select number of iterations
based on the size of the number */
+
+/* number of Miller-Rabin iterations for an error rate of less than 2^-80
+ * for random 'b'-bit input, b >= 100 (taken from table 4.4 in the Handbook
+ * of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996];
+ * original paper: Damgaard, Landrock, Pomerance: Average case error estimates
+ * for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */
+#define BN_prime_checks_size(b) ((b) >= 1300 ? 2 : \
+ (b) >= 850 ? 3 : \
+ (b) >= 650 ? 4 : \
+ (b) >= 550 ? 5 : \
+ (b) >= 450 ? 6 : \
+ (b) >= 400 ? 7 : \
+ (b) >= 350 ? 8 : \
+ (b) >= 300 ? 9 : \
+ (b) >= 250 ? 12 : \
+ (b) >= 200 ? 15 : \
+ (b) >= 150 ? 18 : \
+ /* b >= 100 */ 27)
+
#define BN_num_bytes(a) ((BN_num_bits(a)+7)/8)
#define BN_is_word(a,w) (((a)->top == 1) && ((a)->d[0] == (BN_ULONG)(w)))
#define BN_is_zero(a) (((a)->top == 0) || BN_is_word(a,0))
*/
#include "bn_prime.h"
-/* number of Miller-Rabin iterations for an error rate of less than 2^-80
- * for random 'b'-bit input, b >= 100 (taken from table 4.4 in the Handbook
- * of Applied Cryptography [Menezes, van Oorschot, Vanstone; CRC Press 1996];
- * original paper: Damgaard, Landrock, Pomerance: Average case error estimates
- * for the strong probable prime test. -- Math. Comp. 61 (1993) 177-194) */
-#define BN_prime_checks_size(b) ((b) >= 1300 ? 2 : \
- (b) >= 850 ? 3 : \
- (b) >= 650 ? 4 : \
- (b) >= 550 ? 5 : \
- (b) >= 450 ? 6 : \
- (b) >= 400 ? 7 : \
- (b) >= 350 ? 8 : \
- (b) >= 300 ? 9 : \
- (b) >= 250 ? 12 : \
- (b) >= 200 ? 15 : \
- (b) >= 150 ? 18 : \
- /* b >= 100 */ 27)
-
static int witness(BIGNUM *a, BIGNUM *n, BN_CTX *ctx,BN_CTX *ctx2,
BN_MONT_CTX *mont);
static int probable_prime(BIGNUM *rnd, int bits);
for (i=0; i<checks; i++)
{
- if (!BN_rand(check,BN_num_bits(a)-1,0,0)) goto err;
+ if (!BN_pseudo_rand(check,BN_num_bits(a)-1,0,0)) goto err;
j=witness(check,a,ctx,ctx2,mont);
if (j == -1) goto err;
if (j)
#include "bn_lcl.h"
#include <openssl/rand.h>
-int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
+static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)
{
unsigned char *buf=NULL;
int ret=0,bit,bytes,mask;
time(&tim);
RAND_add(&tim,sizeof(tim),0);
- if (RAND_bytes(buf,(int)bytes) <= 0)
- goto err;
+ if (pseudorand)
+ {
+ if (RAND_pseudo_bytes(buf, bytes) == -1)
+ goto err;
+ }
+ else
+ {
+ if (RAND_bytes(buf, bytes) <= 0)
+ goto err;
+ }
+
if (top)
{
if (bit == 0)
return(ret);
}
+int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
+ {
+ return bnrand(1, rnd, bits, top, bottom);
+ }
+
+int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom)
+ {
+ return bnrand(0, rnd, bits, top, bottom);
+ }
DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length);
DSA * DSA_generate_parameters(int bits, unsigned char *seed,int seed_len,
int *counter_ret, unsigned long *h_ret,void
- (*callback)(),char *cb_arg);
+ (*callback)(),void *cb_arg);
int DSA_generate_key(DSA *a);
int i2d_DSAPublicKey(DSA *a, unsigned char **pp);
int i2d_DSAPrivateKey(DSA *a, unsigned char **pp);
int DSA_print_fp(FILE *bp, DSA *x, int off);
#endif
-int DSA_is_prime(BIGNUM *q,void (*callback)(),char *cb_arg);
+int DSA_is_prime(BIGNUM *q,void (*callback)(),void *cb_arg);
#ifndef NO_DH
/* Convert DSA structure (key or just parameters) into DH structure
DSA *DSA_generate_parameters(int bits, unsigned char *seed_in, int seed_len,
int *counter_ret, unsigned long *h_ret, void (*callback)(),
- char *cb_arg)
+ void *cb_arg)
{
int ok=0;
unsigned char seed[SHA_DIGEST_LENGTH];
if (bits < 512) bits=512;
bits=(bits+63)/64*64;
+ if (seed_len < 20) seed_in = NULL;
if ((seed_in != NULL) && (seed_len == 20))
memcpy(seed,seed_in,seed_len);
/* step 3 */
md[0]|=0x80;
md[SHA_DIGEST_LENGTH-1]|=0x01;
- if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,q)) abort();
+ if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,q)) goto err;
/* step 4 */
- if (DSA_is_prime(q,callback,cb_arg) > 0) break;
+ if (BN_is_prime(q,BN_prime_checks,callback,NULL,cb_arg) > 0) break;
/* do a callback call */
/* step 5 */
}
HASH(buf,SHA_DIGEST_LENGTH,md);
/* step 8 */
- if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0)) abort();
+ if (!BN_bin2bn(md,SHA_DIGEST_LENGTH,r0))
+ goto err;
BN_lshift(r0,r0,160*k);
BN_add(W,W,r0);
}
if (BN_cmp(p,test) >= 0)
{
/* step 11 */
- if (DSA_is_prime(p,callback,cb_arg) > 0)
+ if (BN_is_prime(p,BN_prime_checks,callback,NULL,cb_arg) > 0)
goto end;
}
end:
if (callback != NULL) callback(2,1,cb_arg);
- /* We now need to gernerate g */
+ /* We now need to generate g */
/* Set r0=(p-1)/q */
BN_sub(test,p,BN_value_one());
BN_div(r0,NULL,test,q,ctx);
return(ok?ret:NULL);
}
-int DSA_is_prime(BIGNUM *w, void (*callback)(), char *cb_arg)
+int DSA_is_prime(BIGNUM *w, void (*callback)(), void *cb_arg)
{
int ok= -1,j,i,n;
BN_CTX *ctx=NULL,*ctx2=NULL;
int a;
BN_MONT_CTX *mont=NULL;
- if (!BN_is_bit_set(w,0)) return(0);
+ if (!BN_is_odd(w)) return(0);
if ((ctx=BN_CTX_new()) == NULL) goto err;
if ((ctx2=BN_CTX_new()) == NULL) goto err;
mont_1= &(ctx2->bn[7]);
/* step 1 */
- n=50;
+ n=BN_prime_checks_size(BN_num_bits(w));
/* step 2 */
if (!BN_sub(w_1,w,BN_value_one())) goto err;
for (i=1; i < n; i++)
{
/* step 3 */
- BN_rand(b,BN_num_bits(w)-2/*-1*/,0,0);
+ if (!BN_pseudo_rand(b,BN_num_bits(w)-2/*-1*/,0,0))
+ goto err;
/* BN_set_word(b,0x10001L); */
/* step 4 */
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
BIO_printf(bio_err,"test generation of DSA parameters\n");
- BIO_printf(bio_err,"expect '.*' followed by 5 lines of '.'s and '+'s\n");
+ BIO_printf(bio_err,"expect '.*' followed by 3 lines of '.'s and '+'s\n");
dsa=DSA_generate_parameters(512,seed,20,&counter,&h,dsa_cb,
(char *)bio_err);
char *SHA1_version="SHA1" OPENSSL_VERSION_PTEXT;
+/* The implementation is in ../md32_common.h */
+
#include "sha_locl.h"
#endif
char *SHA_version="SHA" OPENSSL_VERSION_PTEXT;
+/* The implementation is in ../md32_common.h */
+
#include "sha_locl.h"
#endif
These functions implement Montgomery multiplication. They are used
automatically when BN_mod_exp(3) is called with suitable input,
-but they may be useful when several operations are to be perfomed
+but they may be useful when several operations are to be performed
using the same modulus.
BN_MONT_CTX_new() allocates and initializes a B<BN_MONT_CTX> structure.
=head1 NAME
-BN_rand - Generate pseudo-random number
+BN_rand, BN_rand_pseudo - Generate pseudo-random number
=head1 SYNOPSIS
int BN_rand(BIGNUM *rnd, int bits, int top, int bottom);
+ int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom);
+
=head1 DESCRIPTION
BN_rand() generates a cryptographically strong pseudo-random number of
product of two such random numbers will always have 2*B<bits> length.
If B<bottom> is true, the number will be odd.
+BN_pseudo_rand() does the same, but pseudo-random numbers generated by
+this function are not necessarily unpredictable. They can be used for
+non-cryptographic purposes and for certain purposes in cryptographic
+protocols, but usually not for key generation etc.
+
The PRNG must be seeded prior to calling BN_rand().
=head1 RETURN VALUES
-BN_rand() returns 1 on success, 0 on error.
+BN_rand() and BN_pseudo_rand() return 1 on success, 0 on error.
The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
=head1 SEE ALSO
=head1 HISTORY
BN_rand() is available in all versions of SSLeay and OpenSSL.
+BN_pseudo_rand() was added in OpenSSL 0.9.5.
=cut
The parameters generated by DH_generate_parameters() are not to be
used in signature schemes.
+=head1 BUGS
+
+If B<generator> is not 2 or 5, B<dh-E<gt>g>=B<generator> is not
+a usable generator.
+
=head1 SEE ALSO
L<dh(3)|dh(3)>, L<err(3)|err(3)>, L<rand(3)|rand(3)>, L<DH_free(3)|DH_free(3)>
=head1 NAME
-DH_get_ex_new_index, DH_set_ex_data, DH_get_ex_data - ...
+DH_get_ex_new_index, DH_set_ex_data, DH_get_ex_data - add application specific data to DH structures
=head1 SYNOPSIS
#include <openssl/dh.h>
- int DH_get_ex_new_index(long argl, char *argp, int (*new_func)(),
- int (*dup_func)(), void (*free_func)());
+ int DH_get_ex_new_index(long argl, void *argp,
+ CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func,
+ CRYPTO_EX_free *free_func);
- int DH_set_ex_data(DH *d, int idx, char *arg);
+ int DH_set_ex_data(DH *d, int idx, void *arg);
char *DH_get_ex_data(DH *d, int idx);
=head1 DESCRIPTION
-...
-
-=head1 RETURN VALUES
-
-...
+These functions handle application specific data in DH
+structures. Their usage is identical to that of
+RSA_get_ex_new_index(), RSA_set_ex_data() and RSA_get_ex_data()
+as described in L<RSA_get_ex_new_index(3)>.
=head1 SEE ALSO
-...
+L<RSA_get_ex_new_index()|RSA_get_ex_new_index()>, L<dh(3)|dh(3)>
=head1 HISTORY
-...
+RSA_get_ex_new_index(), RSA_set_ex_data() and RSA_get_ex_data() are
+available since OpenSSL 0.9.5.
=cut
DH* DH_new(void);
- void DH_free(DH *rsa);
+ void DH_free(DH *dh);
=head1 DESCRIPTION
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_SIG_new, DSA_SIG_free - allocate and free DSA signature objects
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DSA_SIG *DSA_SIG_new(void);
+
+ void DSA_SIG_free(DSA_SIG *a);
+
+=head1 DESCRIPTION
+
+DSA_SIG_new() allocates and initializes a B<DSA_SIG> structure.
+
+DSA_SIG_free() frees the B<DSA_SIG> structure and its components. The
+values are erased before the memory is returned to the system.
+
+=head1 RETURN VALUES
+
+If the allocation fails, DSA_SIG_new() returns B<NULL> and sets an
+error code that can be obtained by
+L<ERR_get_error(3)|ERR_get_error(3)>. Otherwise it returns a pointer
+to the newly allocated structure.
+
+DSA_SIG_free() returns no value.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>, L<DSA_do_sign(3)|DSA_do_sign(3)>
+
+=head1 HISTORY
+
+DSA_SIG_new() and DSA_SIG_free() were added in OpenSSL 0.9.3.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_do_sign, DSA_do_verify - Raw DSA signature operations
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
+
+ int DSA_do_verify(const unsigned char *dgst, int dgst_len,
+ DSA_SIG *sig, DSA *dsa);
+
+=head1 DESCRIPTION
+
+DSA_do_sign() computes a digital signature on the B<len> byte message
+digest B<dgst> using the private key B<dsa> and returns it in a
+newly allocated B<DSA_SIG> structure.
+
+L<DSA_sign_setup(3)|DSA_sign_setup(3)> may be used to precompute part
+of the signing operation in case signature generation is
+time-critical.
+
+DSA_do_verify() verifies that the signature B<sig> matches a given
+message digest B<dgst> of size B<len>. B<dsa> is the signer's public
+key.
+
+=head1 RETURN VALUES
+
+DSA_do_sign() returns the signature, NULL on error. DSA_do_verify()
+returns 1 for a valid signature, 0 for an incorrect signature and -1
+on error. The error codes can be obtained by
+L<ERR_get_error(3)|ERR_get_error(3)>.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>, L<DSA_SIG_new(3)|DSA_SIG_new(3)>,
+L<DSA_sign(3)|DSA_sign(3)>
+
+=head1 HISTORY
+
+DSA_do_sign() and DSA_do_verify() were added in OpenSSL 0.9.3.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_dup_DH - Create a DH structure out of DSA structure
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DH * DSA_dup_DH(DSA *r);
+
+=head1 DESCRIPTION
+
+DSA_dup_DH() duplicates DSA parameters/keys as DH parameters/keys. q
+is lost during that conversion, but the resulting DH parameters
+contain its length.
+
+=head1 RETURN VALUE
+
+DSA_dup_DH() returns the new B<DH> structure, and NULL on error. The
+error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
+
+=head1 SEE ALSO
+
+L<dh(3)|dh(3)>, L<dsa(3)|dsa(3)>, L<err(3)|err(3)>
+
+=head1 HISTORY
+
+DSA_dup_DH() was added in OpenSSL 0.9.4.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_generate_key - Generate DSA key pair
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ int DSA_generate_key(DSA *a);
+
+=head1 DESCRIPTION
+
+DSA_generate_key() expects B<a> to contain DSA parameters. It generates
+a new key pair and stores it in B<a-E<gt>pub_key> and B<a-E<gt>priv_key>.
+
+The PRNG must be seeded prior to calling DSA_generate_key().
+
+=head1 RETURN VALUE
+
+DSA_generate_key() returns 1 on success, 0 otherwise.
+The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>, L<rand(3)|rand(3)>, L<DSA_generate_parameters(3)|DSA_generate_parameters(3)>
+
+=head1 HISTORY
+
+DSA_generate_key() is available since SSLeay 0.8.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_generate_parameters - Generate DSA parameters
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DSA * DSA_generate_parameters(int bits, unsigned char *seed,
+ int seed_len, int *counter_ret, unsigned long *h_ret,
+ void (*callback)(), void *cb_arg);
+
+=head1 DESCRIPTION
+
+DSA_generate_parameters() generates primes p and q and a generator g
+for use in the DSA.
+
+B<bits> is the length of the prime to be generated; the DSS allows a
+maximum of 1024 bits.
+
+If B<seed> is NULL or B<seed_len> E<lt> 20, the primes will be
+generated at random. Otherwise, the seed is used to generate
+them. If the given seed does not yield a prime q, a new random
+seed is chosen and placed at B<seed>.
+
+DSA_generate_parameters() places the iteration count in
+*B<counter_ret> and a counter used for finding a generator in
+*B<h_ret>, unless these are NULL.
+
+A callback function may be used to provide feedback about the progress
+of the key generation. If B<callback> is not B<NULL>, it will be
+called as follows:
+
+=over 4
+
+=item *
+
+When the the m-th candidate for q is generated, B<callback(0, m,
+cb_arg)> is called.
+
+=item *
+
+B<callback(1, j++, cb_arg)> is called in the inner loop of the
+Miller-Rabin primality test.
+
+=item *
+
+When a prime q has been found, B<callback(2, 0, cb_arg)> and
+B<callback(3, 0, cb_arg)> are called.
+
+=item *
+
+While candidates for p are being tested, B<callback(1, j++, cb_arg)>
+is called in the inner loop of the Miller-Rabin primality test, then
+B<callback(0, counter, cb_arg)> is called when the next candidate
+is chosen.
+
+=item *
+
+When p has been found, B<callback(2, 1, cb_arg)> is called.
+
+=item *
+
+When the generator has been found, B<callback(3, 1, cb_arg)> is called.
+
+=back
+
+=head1 RETURN VALUE
+
+DSA_generate_parameters() returns a pointer to the DSA structure, or
+NULL if the parameter generation fails. The error codes can be
+obtained by L<ERR_get_error(3)|ERR_get_error(3)>.
+
+=head1 BUGS
+
+The deterministic generation of p does not follow the NIST algorithm:
+r0 is SHA1(s+k+1), but should be SHA1(s+j+k) with j_0=2,
+j_counter=j_counter-1 + n + 1.
+
+Seed lengths E<gt> 20 are not supported.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>, L<rand(3)|rand(3)>,
+L<DSA_free(3)|DSA_free(3)>
+
+=head1 HISTORY
+
+DSA_generate_parameters() appeared in SSLeay 0.8. The B<cb_arg>
+argument was added in SSLeay 0.9.0.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_get_ex_new_index, DSA_set_ex_data, DSA_get_ex_data - add application specific data to DSA structures
+
+=head1 SYNOPSIS
+
+ #include <openssl/DSA.h>
+
+ int DSA_get_ex_new_index(long argl, void *argp,
+ CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func,
+ CRYPTO_EX_free *free_func);
+
+ int DSA_set_ex_data(DSA *d, int idx, void *arg);
+
+ char *DSA_get_ex_data(DSA *d, int idx);
+
+=head1 DESCRIPTION
+
+These functions handle application specific data in DSA
+structures. Their usage is identical to that of
+RSA_get_ex_new_index(), RSA_set_ex_data() and RSA_get_ex_data()
+as described in L<RSA_get_ex_new_index(3)>.
+
+=head1 SEE ALSO
+
+L<RSA_get_ex_new_index()|RSA_get_ex_new_index()>, L<dsa(3)|dsa(3)>
+
+=head1 HISTORY
+
+DH_get_ex_new_index(), DH_set_ex_data() and DH_get_ex_data() are
+available since OpenSSL 0.9.5.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_new, DSA_free - allocate and free DSA objects
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DSA* DSA_new(void);
+
+ void DSA_free(DSA *dsa);
+
+=head1 DESCRIPTION
+
+DSA_new() allocates and initializes a B<DSA> structure.
+
+DSA_free() frees the B<DSA> structure and its components. The values are
+erased before the memory is returned to the system.
+
+=head1 RETURN VALUES
+
+If the allocation fails, DSA_new() returns B<NULL> and sets an error
+code that can be obtained by
+L<ERR_get_error(3)|ERR_get_error(3)>. Otherwise it returns a pointer
+to the newly allocated structure.
+
+DSA_free() returns no value.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>,
+L<DSA_generate_parameters(3)|DSA_generate_parameters(3)>,
+L<DSA_generate_key(3)|DSA_generate_key(3)>
+
+=head1 HISTORY
+
+DSA_new() and DSA_free() are available in all versions of SSLeay and OpenSSL.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_set_default_method, DSA_get_default_method, DSA_set_method,
+DSA_new_method, DSA_OpenSSL - Select RSA method
+
+=head1 SYNOPSIS
+
+ #include <openssl/DSA.h>
+
+ void DSA_set_default_method(DSA_METHOD *meth);
+
+ DSA_METHOD *DSA_get_default_method(void);
+
+ DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth);
+
+ DSA *DSA_new_method(DSA_METHOD *meth);
+
+ DSA_METHOD *DSA_OpenSSL(void);
+
+=head1 DESCRIPTION
+
+A B<DSA_METHOD> specifies the functions that OpenSSL uses for DSA
+operations. By modifying the method, alternative implementations
+such as hardware accelerators may be used.
+
+Initially, the default is to use the OpenSSL internal implementation.
+DSA_OpenSSL() returns a pointer to that method.
+
+DSA_set_default_method() makes B<meth> the default method for all B<DSA>
+structures created later.
+
+DSA_get_default_method() returns a pointer to the current default
+method.
+
+DSA_set_method() selects B<meth> for all operations using the structure B<DSA>.
+
+DSA_get_method() returns a pointer to the method currently selected
+for B<DSA>.
+
+DSA_new_method() allocates and initializes a B<DSA> structure so that
+B<method> will be used for the DSA operations. If B<method> is B<NULL>,
+the default method is used.
+
+=head1 THE DSA_METHOD STRUCTURE
+
+struct
+ {
+ /* name of the implementation */
+ const char *name;
+
+ /* sign */
+ DSA_SIG *(*dsa_do_sign)(const unsigned char *dgst, int dlen,
+ DSA *dsa);
+
+ /* pre-compute k^-1 and r */
+ int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
+ BIGNUM **rp);
+
+ /* verify */
+ int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
+ DSA_SIG *sig, DSA *dsa);
+
+ /* compute rr = a1^p1 * a2^p2 mod m. May be NULL */
+ int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
+ BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
+ BN_CTX *ctx, BN_MONT_CTX *in_mont);
+
+ /* compute r = a ^ p mod m. May be NULL */
+ int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx);
+
+ /* called at DSA_new */
+ int (*init)(DSA *DSA);
+
+ /* called at DSA_free */
+ int (*finish)(DSA *DSA);
+
+ int flags;
+
+ char *app_data; /* ?? */
+
+ } DSA_METHOD;
+
+=head1 RETURN VALUES
+
+DSA_OpenSSL(), DSA_get_default_method() and DSA_get_method() return
+pointers to the respective B<DSA_METHOD>s.
+
+DSA_set_default_method() returns no value.
+
+DSA_set_method() returns a pointer to the B<DSA_METHOD> previously
+associated with B<dsa>.
+
+DSA_new_method() returns B<NULL> and sets an error code that can be
+obtained by L<ERR_get_error(3)|ERR_get_error(3)> if the allocation
+fails. Otherwise it returns a pointer to the newly allocated
+structure.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<DSA_new(3)|DSA_new(3)>
+
+=head1 HISTORY
+
+DSA_set_default_method(), DSA_get_default_method(), DSA_set_method(),
+DSA_new_method() and DSA_OpenSSL() were added in OpenSSL 0.9.4.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_sign, DSA_sign_setup, DSA_verify - DSA signatures
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ int DSA_sign(int type, const unsigned char *dgst, int len,
+ unsigned char *sigret, unsigned int *siglen, DSA *dsa);
+
+ int DSA_sign_setup(DSA *dsa, BN_CTX *ctx, BIGNUM **kinvp,
+ BIGNUM **rp);
+
+ int DSA_verify(int type, const unsigned char *dgst, int len,
+ unsigned char *sigbuf, int siglen, DSA *dsa);
+
+=head1 DESCRIPTION
+
+DSA_sign() computes a digital signature on the B<len> byte message
+digest B<dgst> using the private key B<dsa> and places its ASN.1 DER
+encoding at B<sigret>. The length of the signature is places in
+*B<siglen>. B<sigret> must point to DSA_size(B<dsa>) bytes of memory.
+
+DSA_sign_setup() may be used to precompute part of the signing
+operation in case signature generation is time-critical. It expects
+B<dsa> to contain DSA parameters. It places the precomputed values
+in newly allocated B<BIGNUM>s at *B<kinvp> and *B<rp>, after freeing
+the old ones unless *B<kinvp> and *B<rp> are NULL. These values may
+be passed to DSA_sign() in B<dsa-E<gt>kinv> and B<dsa-E<gt>r>.
+B<ctx> is a pre-allocated B<BN_CTX> or NULL.
+
+DSA_verify() verifies that the signature B<sigbuf> of size B<siglen>
+matches a given message digest B<dgst> of size B<len>.
+B<dsa> is the signer's public key.
+
+The B<type> parameter is ignored.
+
+=head1 RETURN VALUES
+
+DSA_sign() and DSA_sign_setup() return 1 on success, 0 on error.
+DSA_verify() returns 1 for a valid signature, 0 for an incorrect
+signature and -1 on error. The error codes can be obtained by
+L<ERR_get_error(3)|ERR_get_error(3)>.
+
+=head1 CONFORMING TO
+
+US Federal Information Processing Standard FIPS 186 (Digital Signature
+Standard, DSS), ANSI X9.30
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<err(3)|err(3)>, L<DSA_do_sign(3)|DSA_do_sign(3)>
+
+=head1 HISTORY
+
+DSA_sign() and DSA_verify() are available in all versions of SSLeay.
+DSA_sign_setup() was added in SSLeay 0.8.
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+DSA_size - Get DSA signature size
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ int DSA_size(DSA *dsa);
+
+=head1 DESCRIPTION
+
+This function returns the size of an ASN.1 encoded DSA signature in
+bytes. It can be used to determine how much memory must be allocated
+for a DSA signature.
+
+B<dsa-E<gt>q> must not be B<NULL>.
+
+=head1 RETURN VALUE
+
+The size in bytes.
+
+=head1 SEE ALSO
+
+L<dsa(3)|dsa(3)>, L<DSA_sign(3)|DSA_sign(3)>
+
+=head1 HISTORY
+
+DSA_size() is available in all versions of SSLeay and OpenSSL.
+
+=cut
=head1 NAME
-RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data - add application specific data to RSA structures.
+RSA_get_ex_new_index, RSA_set_ex_data, RSA_get_ex_data - add application specific data to RSA structures
=head1 SYNOPSIS
CRYPTO_EX_dup *dup_func,
CRYPTO_EX_free *free_func);
- int RSA_set_ex_data(RSA *r,int idx,void *arg);
+ int RSA_set_ex_data(RSA *r, int idx, void *arg);
void *RSA_get_ex_data(RSA *r, int idx);
void free_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp);
+
int dup_func(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from, void *from_d,
int idx, long argl, void *argp);
=head1 HISTORY
-RSA_get_ex_new_index(), RSA_set_ex_data() and RSA_get_ex_data are
+RSA_get_ex_new_index(), RSA_set_ex_data() and RSA_get_ex_data() are
available since SSLeay 0.9.0.
=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+SHA1 - Compute SHA1 hash
+
+=head1 SYNOPSIS
+
+ #include <openssl/sha.h>
+
+ unsigned char *SHA1(const unsigned char *d, unsigned long n,
+ unsigned char *md);
+
+=head1 DESCRIPTION
+
+SHA1() computes the SHA-1 message digest of the B<n> bytes at B<d> and
+places it in B<md> (which must have space for SHA_DIGEST_LENGTH == 20
+bytes of output). If B<md> is NULL, the digest is placed in a static
+array.
+
+L<SHA1_Init(3)|SHA1_Init(3)> may be used if the message is not completely
+stored in memory.
+
+=head1 RETURN VALUE
+
+SHA1() returns a pointer to the hash value.
+
+=head1 HISTORY
+
+SHA1() is available in all versions of SSLeay and OpenSSL.
+
+=head1 SEE ALSO
+
+sha(3), ripemd(3), SHA1_Init(3)
+
+=cut
--- /dev/null
+=pod
+
+=head1 NAME
+
+SHA1_Init, SHA1_Update_SHA1_Final - Compute SHA1 hash
+
+=head1 SYNOPSIS
+
+ #include <openssl/sha.h>
+
+ void SHA1_Init(SHA_CTX *c);
+ void SHA1_Update(SHA_CTX *c, const unsigned char *data,
+ unsigned long len);
+ void SHA1_Final(unsigned char *md, SHA_CTX *c);
+
+=head1 DESCRIPTION
+
+SHA1_Init() initializes a B<SHA_CTX> structure.
+
+SHA1_Update() can be called repeatedly with chunks of the message to
+be hashed (B<len> bytes at B<data>).
+
+SHA1_Final() places the message digest in B<md>, which must have space
+for SHA_DIGEST_LENGTH == 20 bytes of output, and erases the B<SHA_CTX>.
+
+When the entire message is available at one time, L<SHA1(3)|SHA(1)>
+can be used.
+
+=head1 RETURN VALUES
+
+SHA1_Init(), SHA1_Update() and SHA1_Final() do not return values.
+
+=head1 HISTORY
+
+SHA1_Init(), SHA1_Update() and SHA1_Final()are available in all
+versions of SSLeay and OpenSSL.
+
+=head1 SEE ALSO
+
+sha(3), ripemd(3), SHA1(3)
+
+=cut
unsigned long BN_get_word(BIGNUM *a);
int BN_rand(BIGNUM *rnd, int bits, int top,int bottom);
+ int BN_pseudo_rand(BIGNUM *rnd, int bits, int top,int bottom);
BIGNUM *BN_generate_prime(BIGNUM *ret,int bits,int safe,BIGNUM *add,
BIGNUM *rem,void (*callback)(int,int,void *),void *cb_arg);
#include <openssl/dh.h>
- void DH_set_default_method(DH_METHOD *meth);
- DH_METHOD *DH_get_default_method(void);
- DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
- DH *DH_new_method(DH_METHOD *meth);
- DH_METHOD *DH_OpenSSL(void);
-
DH * DH_new(void);
void DH_free(DH *dh);
int DH_size(DH *dh);
- int DH_get_ex_new_index(long argl, char *argp, int (*new_func)(),
- int (*dup_func)(), void (*free_func)());
- int DH_set_ex_data(DH *d, int idx, char *arg);
- char *DH_get_ex_data(DH *d, int idx);
-
DH * DH_generate_parameters(int prime_len, int generator,
void (*callback)(int, int, void *), void *cb_arg);
int DH_check(DH *dh, int *codes);
int DH_generate_key(DH *dh);
int DH_compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh);
+ void DH_set_default_method(DH_METHOD *meth);
+ DH_METHOD *DH_get_default_method(void);
+ DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
+ DH *DH_new_method(DH_METHOD *meth);
+ DH_METHOD *DH_OpenSSL(void);
+
+ int DH_get_ex_new_index(long argl, char *argp, int (*new_func)(),
+ int (*dup_func)(), void (*free_func)());
+ int DH_set_ex_data(DH *d, int idx, char *arg);
+ char *DH_get_ex_data(DH *d, int idx);
+
DH * d2i_DHparams(DH **a, unsigned char **pp, long length);
int i2d_DHparams(DH *a, unsigned char **pp);
--- /dev/null
+=pod
+
+=head1 NAME
+
+dsa - Digital Signature Algorithm
+
+=head1 SYNOPSIS
+
+ #include <openssl/dsa.h>
+
+ DSA * DSA_new(void);
+ void DSA_free(DSA *dsa);
+
+ int DSA_size(DSA *dsa);
+
+ DSA * DSA_generate_parameters(int bits, unsigned char *seed,
+ int seed_len, int *counter_ret, unsigned long *h_ret,
+ void (*callback)(), void *cb_arg);
+
+ DH * DSA_dup_DH(DSA *r);
+
+ int DSA_generate_key(DSA *dsa);
+
+ int DSA_sign(int dummy, const unsigned char *dgst, int len,
+ unsigned char *sigret, unsigned int *siglen, DSA *dsa);
+ int DSA_sign_setup(DSA *dsa, BN_CTX *ctx, BIGNUM **kinvp,
+ BIGNUM **rp);
+ int DSA_verify(int dummy, const unsigned char *dgst, int len,
+ unsigned char *sigbuf, int siglen, DSA *dsa);
+
+ void DSA_set_default_method(DSA_METHOD *meth);
+ DSA_METHOD *DSA_get_default_method(void);
+ DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth);
+ DSA *DSA_new_method(DSA_METHOD *meth);
+ DSA_METHOD *DSA_OpenSSL(void);
+
+ int DSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
+ int (*dup_func)(), void (*free_func)());
+ int DSA_set_ex_data(DSA *d, int idx, char *arg);
+ char *DSA_get_ex_data(DSA *d, int idx);
+
+ DSA_SIG *DSA_SIG_new(void);
+ void DSA_SIG_free(DSA_SIG *a);
+ int i2d_DSA_SIG(DSA_SIG *a, unsigned char **pp);
+ DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, unsigned char **pp, long length);
+
+ DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
+ int DSA_do_verify(const unsigned char *dgst, int dgst_len,
+ DSA_SIG *sig, DSA *dsa);
+
+ DSA * d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length);
+ DSA * d2i_DSAPrivateKey(DSA **a, unsigned char **pp, long length);
+ DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length);
+ int i2d_DSAPublicKey(DSA *a, unsigned char **pp);
+ int i2d_DSAPrivateKey(DSA *a, unsigned char **pp);
+ int i2d_DSAparams(DSA *a,unsigned char **pp);
+
+ int DSAparams_print(BIO *bp, DSA *x);
+ int DSAparams_print_fp(FILE *fp, DSA *x);
+ int DSA_print(BIO *bp, DSA *x, int off);
+ int DSA_print_fp(FILE *bp, DSA *x, int off);
+
+=head1 DESCRIPTION
+
+These functions implement the Digital Signature Algorithm (DSA). The
+generation of shared DSA parameters is described in
+L<DSA_generate_parameters(3)>; L<DSA_generate_key(3)> describes how to
+generate a signature key. Signature generation and verification are
+described in L<DSA_sign(3)>.
+
+The B<DSA> structure consists of several BIGNUM components.
+
+ struct
+ {
+ BIGNUM *p; // prime number (public)
+ BIGNUM *q; // 160-bit subprime, q | p-1 (public)
+ BIGNUM *g; // generator of subgroup (public)
+ BIGNUM *priv_key; // private key x
+ BIGNUM *pub_key; // public key y = g^x
+ // ...
+ }
+ DSA;
+
+In public keys, B<priv_key> is NULL.
+
+=head1 CONFORMING TO
+
+US Federal Information Processing Standard FIPS 186 (Digital Signature
+Standard, DSS), ANSI X9.30
+
+=head1 SEE ALSO
+
+bn(3), dh(3), err(3), rand(3), rsa(3), sha(3)
+
+=cut
B<dmp1>, B<dmq1> and B<iqmp> may be B<NULL> in private keys, but the
RSA operations are much faster when these values are available.
+=head1 CONFORMING TO
+
+SSL, PKCS #1 v2.0
+
=head1 PATENTS
RSA is covered by a US patent which expires in September 2000.
--- /dev/null
+=pod
+
+=head1 NAME
+
+sha - Secure Hash Algorithm
+
+=head1 SYNOPSIS
+
+ #include <openssl/sha.h>
+
+ unsigned char *SHA1(const unsigned char *d, unsigned long n,
+ unsigned char *md);
+
+ void SHA1_Init(SHA_CTX *c);
+ void SHA1_Update(SHA_CTX *c, const unsigned char *data,
+ unsigned long len);
+ void SHA1_Final(unsigned char *md, SHA_CTX *c);
+
+=head1 DESCRIPTION
+
+SHA-1 (Secure Hash Algorithm) is a cryptographic hash function with a
+160 bit output.
+
+The predecessor of SHA-1, SHA, is also implemented, but it should be
+used only when backward compatibility is required.
+
+=head1 CONFORMING TO
+
+US Federal Information Processing Standard FIPS 180 (Secure Hash
+Standard), ANSI X9.30
+
+=head1 SEE ALSO
+
+ripemd(3), SHA1(3), SHA1_Init(3)
+
+=cut
projects / openssl.git / commitdiff