diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/dsa/dsa_lib.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/dsa/dsa_lib.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/dsa/dsa_lib.c b/openssl-1.1.0h/crypto/dsa/dsa_lib.c new file mode 100644 index 0000000..9598846 --- /dev/null +++ b/openssl-1.1.0h/crypto/dsa/dsa_lib.c @@ -0,0 +1,332 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */ + +#include <stdio.h> +#include "internal/cryptlib.h" +#include <openssl/bn.h> +#include "dsa_locl.h" +#include <openssl/asn1.h> +#include <openssl/engine.h> +#include <openssl/dh.h> + +DSA *DSA_new(void) +{ + return DSA_new_method(NULL); +} + +int DSA_set_method(DSA *dsa, const DSA_METHOD *meth) +{ + /* + * NB: The caller is specifically setting a method, so it's not up to us + * to deal with which ENGINE it comes from. + */ + const DSA_METHOD *mtmp; + mtmp = dsa->meth; + if (mtmp->finish) + mtmp->finish(dsa); +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(dsa->engine); + dsa->engine = NULL; +#endif + dsa->meth = meth; + if (meth->init) + meth->init(dsa); + return 1; +} + +const DSA_METHOD *DSA_get_method(DSA *d) +{ + return d->meth; +} + +DSA *DSA_new_method(ENGINE *engine) +{ + DSA *ret = OPENSSL_zalloc(sizeof(*ret)); + + if (ret == NULL) { + DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->references = 1; + ret->lock = CRYPTO_THREAD_lock_new(); + if (ret->lock == NULL) { + DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + OPENSSL_free(ret); + return NULL; + } + + ret->meth = DSA_get_default_method(); +#ifndef OPENSSL_NO_ENGINE + ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; /* early default init */ + if (engine) { + if (!ENGINE_init(engine)) { + DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + ret->engine = engine; + } else + ret->engine = ENGINE_get_default_DSA(); + if (ret->engine) { + ret->meth = ENGINE_get_DSA(ret->engine); + if (ret->meth == NULL) { + DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + } +#endif + + ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; + + if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data)) + goto err; + + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { + DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_INIT_FAIL); +err: + DSA_free(ret); + ret = NULL; + } + + return ret; +} + +void DSA_free(DSA *r) +{ + int i; + + if (r == NULL) + return; + + CRYPTO_atomic_add(&r->references, -1, &i, r->lock); + REF_PRINT_COUNT("DSA", r); + if (i > 0) + return; + REF_ASSERT_ISNT(i < 0); + + if (r->meth->finish) + r->meth->finish(r); +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(r->engine); +#endif + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data); + + CRYPTO_THREAD_lock_free(r->lock); + + BN_clear_free(r->p); + BN_clear_free(r->q); + BN_clear_free(r->g); + BN_clear_free(r->pub_key); + BN_clear_free(r->priv_key); + OPENSSL_free(r); +} + +int DSA_up_ref(DSA *r) +{ + int i; + + if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0) + return 0; + + REF_PRINT_COUNT("DSA", r); + REF_ASSERT_ISNT(i < 2); + return ((i > 1) ? 1 : 0); +} + +int DSA_size(const DSA *r) +{ + int ret, i; + ASN1_INTEGER bs; + unsigned char buf[4]; /* 4 bytes looks really small. However, + * i2d_ASN1_INTEGER() will not look beyond + * the first byte, as long as the second + * parameter is NULL. */ + + i = BN_num_bits(r->q); + bs.length = (i + 7) / 8; + bs.data = buf; + bs.type = V_ASN1_INTEGER; + /* If the top bit is set the asn1 encoding is 1 larger. */ + buf[0] = 0xff; + + i = i2d_ASN1_INTEGER(&bs, NULL); + i += i; /* r and s */ + ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); + return (ret); +} + +int DSA_set_ex_data(DSA *d, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&d->ex_data, idx, arg)); +} + +void *DSA_get_ex_data(DSA *d, int idx) +{ + return (CRYPTO_get_ex_data(&d->ex_data, idx)); +} + +int DSA_security_bits(const DSA *d) +{ + if (d->p && d->q) + return BN_security_bits(BN_num_bits(d->p), BN_num_bits(d->q)); + return -1; +} + +#ifndef OPENSSL_NO_DH +DH *DSA_dup_DH(const DSA *r) +{ + /* + * DSA has p, q, g, optional pub_key, optional priv_key. DH has p, + * optional length, g, optional pub_key, optional priv_key, optional q. + */ + + DH *ret = NULL; + BIGNUM *p = NULL, *q = NULL, *g = NULL, *pub_key = NULL, *priv_key = NULL; + + if (r == NULL) + goto err; + ret = DH_new(); + if (ret == NULL) + goto err; + if (r->p != NULL || r->g != NULL || r->q != NULL) { + if (r->p == NULL || r->g == NULL || r->q == NULL) { + /* Shouldn't happen */ + goto err; + } + p = BN_dup(r->p); + g = BN_dup(r->g); + q = BN_dup(r->q); + if (p == NULL || g == NULL || q == NULL || !DH_set0_pqg(ret, p, q, g)) + goto err; + p = g = q = NULL; + } + + if (r->pub_key != NULL) { + pub_key = BN_dup(r->pub_key); + if (pub_key == NULL) + goto err; + if (r->priv_key != NULL) { + priv_key = BN_dup(r->priv_key); + if (priv_key == NULL) + goto err; + } + if (!DH_set0_key(ret, pub_key, priv_key)) + goto err; + } else if (r->priv_key != NULL) { + /* Shouldn't happen */ + goto err; + } + + return ret; + + err: + BN_free(p); + BN_free(g); + BN_free(q); + BN_free(pub_key); + BN_free(priv_key); + DH_free(ret); + return NULL; +} +#endif + +void DSA_get0_pqg(const DSA *d, + const BIGNUM **p, const BIGNUM **q, const BIGNUM **g) +{ + if (p != NULL) + *p = d->p; + if (q != NULL) + *q = d->q; + if (g != NULL) + *g = d->g; +} + +int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g) +{ + /* If the fields p, q and g in d are NULL, the corresponding input + * parameters MUST be non-NULL. + */ + if ((d->p == NULL && p == NULL) + || (d->q == NULL && q == NULL) + || (d->g == NULL && g == NULL)) + return 0; + + if (p != NULL) { + BN_free(d->p); + d->p = p; + } + if (q != NULL) { + BN_free(d->q); + d->q = q; + } + if (g != NULL) { + BN_free(d->g); + d->g = g; + } + + return 1; +} + +void DSA_get0_key(const DSA *d, + const BIGNUM **pub_key, const BIGNUM **priv_key) +{ + if (pub_key != NULL) + *pub_key = d->pub_key; + if (priv_key != NULL) + *priv_key = d->priv_key; +} + +int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key) +{ + /* If the field pub_key in d is NULL, the corresponding input + * parameters MUST be non-NULL. The priv_key field may + * be left NULL. + */ + if (d->pub_key == NULL && pub_key == NULL) + return 0; + + if (pub_key != NULL) { + BN_free(d->pub_key); + d->pub_key = pub_key; + } + if (priv_key != NULL) { + BN_free(d->priv_key); + d->priv_key = priv_key; + } + + return 1; +} + +void DSA_clear_flags(DSA *d, int flags) +{ + d->flags &= ~flags; +} + +int DSA_test_flags(const DSA *d, int flags) +{ + return d->flags & flags; +} + +void DSA_set_flags(DSA *d, int flags) +{ + d->flags |= flags; +} + +ENGINE *DSA_get0_engine(DSA *d) +{ + return d->engine; +} + +int DSA_bits(const DSA *dsa) +{ + return BN_num_bits(dsa->p); +} |