/* crypto/ecdsa/ecdsa.h */
+/**
+ * \file crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions
+ * \author Written by Nils Larsch for the OpenSSL project
+ */
/* ====================================================================
- * Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
/* EC_KEY_METH_DATA part */
int (*init)(EC_KEY *);
void (*finish)(EC_KEY *);
- /* method specific part */
+ /* method (ECDSA) specific part */
BIGNUM *kinv; /* signing pre-calc */
BIGNUM *r; /* signing pre-calc */
ENGINE *engine;
CRYPTO_EX_DATA ex_data;
} ECDSA_DATA;
-/* signature functions */
+/** ECDSA_SIG *ECDSA_SIG_new(void)
+ * allocates and initialize a ECDSA_SIG structure
+ * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
+ */
ECDSA_SIG *ECDSA_SIG_new(void);
+
+/** ECDSA_SIG_free
+ * frees a ECDSA_SIG structure
+ * \param a pointer to the ECDSA_SIG structure
+ */
void ECDSA_SIG_free(ECDSA_SIG *a);
+
+/** i2d_ECDSA_SIG
+ * DER encode content of ECDSA_SIG object (note: this function modifies *pp
+ * (*pp += length of the DER encoded signature)).
+ * \param a pointer to the ECDSA_SIG object
+ * \param pp pointer to a unsigned char pointer for the output or NULL
+ * \return the length of the DER encoded ECDSA_SIG object or 0
+ */
int i2d_ECDSA_SIG(const ECDSA_SIG *a, unsigned char **pp);
-ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **v, const unsigned char **pp, long length);
-/* ECDSA_DATA functions */
+/** d2i_ECDSA_SIG
+ * decodes a DER encoded ECDSA signature (note: this function changes *pp
+ * (*pp += len)).
+ * \param v pointer to ECDSA_SIG pointer (may be NULL)
+ * \param pp buffer with the DER encoded signature
+ * \param len bufferlength
+ * \return pointer to the decoded ECDSA_SIG structure (or NULL)
+ */
+ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **v, const unsigned char **pp, long len);
+
+/** ECDSA_DATA_new
+ * creates a new ECDSA_DATA object
+ * \return pointer to a newly allocated (and initialized) ECDSA_DATA object
+ */
ECDSA_DATA *ECDSA_DATA_new(void);
-ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *);
-void ECDSA_DATA_free(ECDSA_DATA *);
-ECDSA_DATA *ecdsa_check(EC_KEY *);
+/** ECDSA_DATA_new_method
+ * creates a new ECDSA_DATA object using a specified ENGINE
+ * \param eng pointer to a ENGINE structure
+ * \return pointer to a newly allocated (and initialized) ECDSA_DATA object
+ */
+ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *eng);
+
+/** ECDSA_DATA_free
+ * frees ECDSA_DATA structure
+ * \param data pointer to a ECDSA_DATA structure
+ */
+void ECDSA_DATA_free(ECDSA_DATA *data);
+
+/** ecdsa_check
+ * checks whether ECKEY->meth_data is a pointer to a ECDSA_DATA structure
+ * and if not it removes the old meth_data and creates a ECDSA_DATA structure.
+ * \param eckey pointer to a EC_KEY object
+ * \return pointer to a ECDSA_DATA structure
+ */
+ECDSA_DATA *ecdsa_check(EC_KEY *eckey);
+
+/** ECDSA_do_sign
+ * computes the ECDSA signature of the given hash value using
+ * the supplied private key and returns the created signature.
+ * \param dgst pointer to the hash value
+ * \param dgst_len length of the hash value
+ * \param eckey pointer to the EC_KEY object containing a private EC key
+ * \return pointer to a ECDSA_SIG structure or NULL
+ */
+ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst,int dgst_len,EC_KEY *eckey);
-ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len, EC_KEY *);
+/** ECDSA_do_verify
+ * verifies that the supplied signature is a valid ECDSA
+ * signature of the supplied hash value using the supplied public key.
+ * \param dgst pointer to the hash value
+ * \param dgst_len length of the hash value
+ * \param sig pointer to the ECDSA_SIG structure
+ * \param eckey pointer to the EC_KEY object containing a public EC key
+ * \return 1 if the signature is valid, 0 if the signature is invalid and -1 on error
+ */
int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, ECDSA_SIG
*sig, EC_KEY* eckey);
const ECDSA_METHOD *ECDSA_OpenSSL(void);
-void ECDSA_set_default_method(const ECDSA_METHOD *);
+/** ECDSA_set_default_method
+ * sets the default ECDSA method
+ * \param meth the new default ECDSA_METHOD
+ */
+void ECDSA_set_default_method(const ECDSA_METHOD *meth);
+
+/** ECDSA_get_default_method
+ * returns the default ECDSA method
+ * \return pointer to ECDSA_METHOD structure containing the default method
+ */
const ECDSA_METHOD *ECDSA_get_default_method(void);
-int ECDSA_set_method(EC_KEY *, const ECDSA_METHOD *);
-int ECDSA_size(const EC_KEY *);
+/** ECDSA_set_method
+ * sets method to be used for the ECDSA operations
+ * \param eckey pointer to the EC_KEY object
+ * \param meth pointer to the new method
+ * \return 1 on success and 0 otherwise
+ */
+int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth);
+
+/** ECDSA_size
+ * returns the maximum length of the DER encoded signature
+ * \param eckey pointer to a EC_KEY object
+ * \return numbers of bytes required for the DER encoded signature
+ */
+int ECDSA_size(const EC_KEY *eckey);
+
+/** ECDSA_sign_setup
+ * precompute parts of the signing operation (the computed values may be
+ * passed to ECDSA_DATA->kinv and ECDSA_DATA->r for a later signature
+ * computation).
+ * \param eckey pointer to the EC_KEY object containing a private EC key
+ * \param ctx pointer to a BN_CTX object (may be NULL)
+ * \param kinv pointer to a BIGNUM pointer for the inverse of k
+ * \param rp pointer to a BIGNUM pointer for x coordinate of k * generator
+ * \return 1 on success and 0 otherwise
+ */
int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv,
BIGNUM **rp);
-int ECDSA_sign(int type, const unsigned char *dgst, int dgst_len,
+
+/** ECDSA_sign
+ * computes ECDSA signature of a given hash value using the supplied
+ * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
+ * \param type this parameter is ignored
+ * \param dgst pointer to the hash value to sign
+ * \param dgstlen length of the hash value
+ * \param sig buffer to hold the DER encoded signature
+ * \param siglen pointer to the length of the returned signature
+ * \param eckey pointer to the EC_KEY object containing a private EC key
+ * \return 1 on success and 0 otherwise
+ */
+int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
-int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len,
- const unsigned char *sig, int sig_len, EC_KEY *eckey);
+/** ECDSA_verify
+ * verifies that the given signature is valid ECDSA signature
+ * of the supplied hash value using the specified public key.
+ * \param type this parameter is ignored
+ * \param dgst pointer to the hash value
+ * \param dgstlen length of the hash value
+ * \param sig pointer to the DER encoded signature
+ * \param siglen length of the DER encoded signature
+ * \param eckey pointer to the EC_KEY object containing a public EC key
+ * \return 1 if the signature is valid, 0 if the signature is invalid and -1 on error
+ */
+int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
+ const unsigned char *sig, int siglen, EC_KEY *eckey);
+/* the standard ex_data functions */
int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new
*new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg);
/* crypto/ecdsa/ecs_ossl.c */
+/*
+ * Written by Nils Larsch for the OpenSSL project
+ */
/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1998-2004 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
BIGNUM **rp)
{
BN_CTX *ctx = NULL;
- BIGNUM k,*kinv=NULL,*r=NULL,*order=NULL,*X=NULL;
+ BIGNUM *k = NULL, *r = NULL, *order = NULL, *X = NULL;
EC_POINT *tmp_point=NULL;
+ EC_GROUP *group;
int ret = 0;
if (!eckey || !eckey->group || !eckey->pub_key || !eckey->priv_key)
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
-
- BN_init(&k);
+ group = eckey->group;
if (ctx_in == NULL)
{
- if ((ctx=BN_CTX_new()) == NULL)
+ if ((ctx = BN_CTX_new()) == NULL)
{
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
- goto err;
+ ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_MALLOC_FAILURE);
+ return 0;
}
}
else
- ctx=ctx_in;
+ ctx = ctx_in;
- if ((r = BN_new()) == NULL)
- {
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
- goto err;
- }
- if ((order = BN_new()) == NULL)
+ k = BN_new(); /* this value is later returned in *kinvp */
+ r = BN_new(); /* this value is later returned in *rp */
+ order = BN_new();
+ X = BN_new();
+ if (!k || !r || !order || !X)
{
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
- goto err;
- }
- if ((X = BN_new()) == NULL)
- {
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
- goto err;
+ ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
+ goto err;
}
- if ((tmp_point = EC_POINT_new(eckey->group)) == NULL)
+ if ((tmp_point = EC_POINT_new(group)) == NULL)
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
goto err;
}
- if (!EC_GROUP_get_order(eckey->group,order,ctx))
+ if (!EC_GROUP_get_order(group, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
goto err;
{
/* get random k */
do
- if (!BN_rand_range(&k,order))
+ if (!BN_rand_range(k, order))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,
ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED);
goto err;
}
- while (BN_is_zero(&k));
+ while (BN_is_zero(k));
/* compute r the x-coordinate of generator * k */
- if (!EC_POINT_mul(eckey->group, tmp_point, &k, NULL, NULL, ctx))
+ if (!EC_POINT_mul(group, tmp_point, k, NULL, NULL, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
goto err;
}
- if (EC_METHOD_get_field_type(EC_GROUP_method_of(eckey->group))
- == NID_X9_62_prime_field)
+ if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field)
{
- if (!EC_POINT_get_affine_coordinates_GFp(eckey->group,
+ if (!EC_POINT_get_affine_coordinates_GFp(group,
tmp_point, X, NULL, ctx))
{
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,
- ERR_R_EC_LIB);
+ ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
goto err;
}
}
else /* NID_X9_62_characteristic_two_field */
{
- if (!EC_POINT_get_affine_coordinates_GF2m(eckey->group,
+ if (!EC_POINT_get_affine_coordinates_GF2m(group,
tmp_point, X, NULL, ctx))
{
- ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,
- ERR_R_EC_LIB);
+ ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
goto err;
}
}
- if (!BN_nnmod(r,X,order,ctx))
+ if (!BN_nnmod(r, X, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
goto err;
while (BN_is_zero(r));
/* compute the inverse of k */
- if ((kinv = BN_mod_inverse(NULL,&k,order,ctx)) == NULL)
+ if (!BN_mod_inverse(k, k, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
goto err;
}
-
- if (*rp == NULL)
+ /* clear old values if necessary */
+ if (*rp != NULL)
BN_clear_free(*rp);
- *rp = r;
- if (*kinvp == NULL)
+ if (*kinvp != NULL)
BN_clear_free(*kinvp);
- *kinvp = kinv;
- kinv = NULL;
+ /* save the pre-computed values */
+ *rp = r;
+ *kinvp = k;
ret = 1;
err:
if (!ret)
{
- if (kinv != NULL) BN_clear_free(kinv);
+ if (k != NULL) BN_clear_free(k);
if (r != NULL) BN_clear_free(r);
}
if (ctx_in == NULL)
BN_CTX_free(ctx);
- if (kinv != NULL)
- BN_clear_free(kinv);
if (order != NULL)
- BN_clear_free(order);
+ BN_free(order);
if (tmp_point != NULL)
EC_POINT_free(tmp_point);
- if (X) BN_clear_free(X);
- BN_clear_free(&k);
+ if (X)
+ BN_clear_free(X);
return(ret);
}
static ECDSA_SIG *ecdsa_do_sign(const unsigned char *dgst, int dgst_len,
EC_KEY *eckey)
{
- BIGNUM *kinv=NULL,*r=NULL,*s=NULL,*m=NULL,*tmp=NULL,*order=NULL;
- BIGNUM xr;
- BN_CTX *ctx=NULL;
- ECDSA_SIG *ret=NULL;
+ int ok = 0;
+ BIGNUM *kinv=NULL, *r, *s, *m=NULL,*tmp=NULL,*order=NULL;
+ BN_CTX *ctx = NULL;
+ EC_GROUP *group;
+ ECDSA_SIG *ret;
ECDSA_DATA *ecdsa;
- BN_init(&xr);
-
ecdsa = ecdsa_check(eckey);
- if (!eckey || !eckey->group || !eckey->pub_key || !eckey->priv_key
- || !ecdsa)
+ if (!eckey->group || !eckey->pub_key || !eckey->priv_key || !ecdsa)
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_PASSED_NULL_PARAMETER);
- goto err;
+ return NULL;
}
+ group = eckey->group;
+ ret = ECDSA_SIG_new();
+ if (!ret)
+ {
+ ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ s = ret->s;
+
if ((ctx = BN_CTX_new()) == NULL || (order = BN_new()) == NULL ||
- (tmp = BN_new()) == NULL || (m = BN_new()) == NULL ||
- (s = BN_new()) == NULL )
+ (tmp = BN_new()) == NULL || (m = BN_new()) == NULL)
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
goto err;
}
- if (!EC_GROUP_get_order(eckey->group,order,ctx))
+ if (!EC_GROUP_get_order(group, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_EC_LIB);
goto err;
goto err;
}
- if (BN_bin2bn(dgst,dgst_len,m) == NULL)
+ if (!BN_bin2bn(dgst, dgst_len, m))
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
goto err;
{
if (ecdsa->kinv == NULL || ecdsa->r == NULL)
{
- if (!ECDSA_sign_setup(eckey,ctx,&kinv,&r))
+ if (!ECDSA_sign_setup(eckey, ctx, &kinv, &ret->r))
{
- ECDSAerr(ECDSA_F_ECDSA_DO_SIGN,
- ERR_R_ECDSA_LIB);
+ ECDSAerr(ECDSA_F_ECDSA_DO_SIGN,ERR_R_ECDSA_LIB);
goto err;
}
+ r = ret->r;
}
else
{
- kinv = ecdsa->kinv;
+ BN_free(ret->r);
+ kinv = ecdsa->kinv;
+ r = ecdsa->r;
+ ret->r = r;
ecdsa->kinv = NULL;
- r = ecdsa->r;
- ecdsa->r = NULL;
+ ecdsa->r = NULL;
}
- if (!BN_mod_mul(tmp,eckey->priv_key,r,order,ctx))
+ if (!BN_mod_mul(tmp, eckey->priv_key, r, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
goto err;
}
- if (!BN_add(s,tmp,m))
+ if (!BN_mod_add_quick(s, tmp, m, order))
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
goto err;
}
- if (BN_cmp(s,order) > 0)
- BN_sub(s,s,order);
- if (!BN_mod_mul(s,s,kinv,order,ctx))
+ if (!BN_mod_mul(s, s, kinv, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
goto err;
}
while (BN_is_zero(s));
- if ((ret = ECDSA_SIG_new()) == NULL)
- {
- ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (BN_copy(ret->r, r) == NULL || BN_copy(ret->s, s) == NULL)
+ ok = 1;
+err:
+ if (!ok)
{
ECDSA_SIG_free(ret);
ret = NULL;
- ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
}
-
-err:
- if (r)
- BN_clear_free(r);
- if (s)
- BN_clear_free(s);
if (ctx)
BN_CTX_free(ctx);
if (m)
if (tmp)
BN_clear_free(tmp);
if (order)
- BN_clear_free(order);
+ BN_free(order);
if (kinv)
BN_clear_free(kinv);
- return(ret);
+ return ret;
}
static int ecdsa_do_verify(const unsigned char *dgst, int dgst_len,
ECDSA_SIG *sig, EC_KEY *eckey)
{
- BN_CTX *ctx;
- BIGNUM *order=NULL,*u1=NULL,*u2=NULL,*m=NULL,*X=NULL;
- EC_POINT *point=NULL;
int ret = -1;
+ BN_CTX *ctx;
+ BIGNUM *order, *u1, *u2, *m, *X;
+ EC_POINT *point = NULL;
+ EC_GROUP *group;
+ /* check input values */
if (!eckey || !eckey->group || !eckey->pub_key || !sig)
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_MISSING_PARAMETERS);
return -1;
}
- if ((ctx = BN_CTX_new()) == NULL || (order = BN_new()) == NULL ||
- (u1 = BN_new()) == NULL || (u2 = BN_new()) == NULL ||
- (m = BN_new()) == NULL || (X = BN_new()) == NULL)
+ group = eckey->group;
+
+ ctx = BN_CTX_new();
+ if (!ctx)
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
- goto err;
+ return -1;
}
- if (!EC_GROUP_get_order(eckey->group, order, ctx))
+ BN_CTX_start(ctx);
+ order = BN_CTX_get(ctx);
+ u1 = BN_CTX_get(ctx);
+ u2 = BN_CTX_get(ctx);
+ m = BN_CTX_get(ctx);
+ X = BN_CTX_get(ctx);
+ if (!X)
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
-
- if (BN_is_zero(sig->r) || BN_get_sign(sig->r) ||
- BN_ucmp(sig->r, order) >= 0)
+
+ if (!EC_GROUP_get_order(group, order, ctx))
{
- ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
- ret = 0;
+ ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
goto err;
}
- if (BN_is_zero(sig->s) || BN_get_sign(sig->s) ||
- BN_ucmp(sig->s, order) >= 0)
+
+ if (BN_is_zero(sig->r) || BN_get_sign(sig->r) ||
+ BN_ucmp(sig->r, order) >= 0 || BN_is_zero(sig->s) ||
+ BN_get_sign(sig->s) || BN_ucmp(sig->s, order) >= 0)
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
- ret = 0;
+ ret = 0; /* signature is invalid */
goto err;
}
-
/* calculate tmp1 = inv(S) mod order */
- if ((BN_mod_inverse(u2,sig->s,order,ctx)) == NULL)
+ if (!BN_mod_inverse(u2, sig->s, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
/* digest -> m */
- if (BN_bin2bn(dgst,dgst_len,m) == NULL)
+ if (!BN_bin2bn(dgst, dgst_len, m))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
/* u1 = m * tmp mod order */
- if (!BN_mod_mul(u1,m,u2,order,ctx))
+ if (!BN_mod_mul(u1, m, u2, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
/* u2 = r * w mod q */
- if (!BN_mod_mul(u2,sig->r,u2,order,ctx))
+ if (!BN_mod_mul(u2, sig->r, u2, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
- if ((point = EC_POINT_new(eckey->group)) == NULL)
+ if ((point = EC_POINT_new(group)) == NULL)
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
goto err;
}
- if (!EC_POINT_mul(eckey->group, point, u1, eckey->pub_key, u2, ctx))
+ if (!EC_POINT_mul(group, point, u1, eckey->pub_key, u2, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
goto err;
}
- if (EC_METHOD_get_field_type(EC_GROUP_method_of(eckey->group))
- == NID_X9_62_prime_field)
+ if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field)
{
- if (!EC_POINT_get_affine_coordinates_GFp(eckey->group,
+ if (!EC_POINT_get_affine_coordinates_GFp(group,
point, X, NULL, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
}
else /* NID_X9_62_characteristic_two_field */
{
- if (!EC_POINT_get_affine_coordinates_GF2m(eckey->group,
+ if (!EC_POINT_get_affine_coordinates_GF2m(group,
point, X, NULL, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
}
}
- if (!BN_nnmod(u1,X,order,ctx))
+ if (!BN_nnmod(u1, X, order, ctx))
{
ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
goto err;
}
-
- /* is now in u1. If the signature is correct, it will be
- * equal to R. */
- ret = (BN_ucmp(u1,sig->r) == 0);
-
- err:
- if (ctx)
- BN_CTX_free(ctx);
- if (u1)
- BN_clear_free(u1);
- if (u2)
- BN_clear_free(u2);
- if (m)
- BN_clear_free(m);
- if (X)
- BN_clear_free(X);
- if (order)
- BN_clear_free(order);
+ /* if the signature is correct u1 is equal to sig->r */
+ ret = (BN_ucmp(u1, sig->r) == 0);
+err:
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
if (point)
EC_POINT_free(point);
- return(ret);
+ return ret;
}
projects / oweals / openssl.git / commitdiff