diff options
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/sm2/sm2_sign.c')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/sm2/sm2_sign.c | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/sm2/sm2_sign.c b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/sm2/sm2_sign.c new file mode 100644 index 000000000..683f03f93 --- /dev/null +++ b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/sm2/sm2_sign.c @@ -0,0 +1,479 @@ +/* + * Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 2017 Ribose Inc. All Rights Reserved. + * Ported from Ribose contributions from Botan. + * + * 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 + */ + +#include "crypto/sm2.h" +#include "crypto/sm2err.h" +#include "crypto/ec.h" /* ec_group_do_inverse_ord() */ +#include "internal/numbers.h" +#include <openssl/err.h> +#include <openssl/evp.h> +#include <openssl/err.h> +#include <openssl/bn.h> +#include <string.h> + +int sm2_compute_z_digest(uint8_t *out, + const EVP_MD *digest, + const uint8_t *id, + const size_t id_len, + const EC_KEY *key) +{ + int rc = 0; + const EC_GROUP *group = EC_KEY_get0_group(key); + BN_CTX *ctx = NULL; + EVP_MD_CTX *hash = NULL; + BIGNUM *p = NULL; + BIGNUM *a = NULL; + BIGNUM *b = NULL; + BIGNUM *xG = NULL; + BIGNUM *yG = NULL; + BIGNUM *xA = NULL; + BIGNUM *yA = NULL; + int p_bytes = 0; + uint8_t *buf = NULL; + uint16_t entl = 0; + uint8_t e_byte = 0; + + hash = EVP_MD_CTX_new(); + ctx = BN_CTX_new(); + if (hash == NULL || ctx == NULL) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_MALLOC_FAILURE); + goto done; + } + + p = BN_CTX_get(ctx); + a = BN_CTX_get(ctx); + b = BN_CTX_get(ctx); + xG = BN_CTX_get(ctx); + yG = BN_CTX_get(ctx); + xA = BN_CTX_get(ctx); + yA = BN_CTX_get(ctx); + + if (yA == NULL) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_MALLOC_FAILURE); + goto done; + } + + if (!EVP_DigestInit(hash, digest)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_EVP_LIB); + goto done; + } + + /* Z = h(ENTL || ID || a || b || xG || yG || xA || yA) */ + + if (id_len >= (UINT16_MAX / 8)) { + /* too large */ + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, SM2_R_ID_TOO_LARGE); + goto done; + } + + entl = (uint16_t)(8 * id_len); + + e_byte = entl >> 8; + if (!EVP_DigestUpdate(hash, &e_byte, 1)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_EVP_LIB); + goto done; + } + e_byte = entl & 0xFF; + if (!EVP_DigestUpdate(hash, &e_byte, 1)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_EVP_LIB); + goto done; + } + + if (id_len > 0 && !EVP_DigestUpdate(hash, id, id_len)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_EVP_LIB); + goto done; + } + + if (!EC_GROUP_get_curve(group, p, a, b, ctx)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_EC_LIB); + goto done; + } + + p_bytes = BN_num_bytes(p); + buf = OPENSSL_zalloc(p_bytes); + if (buf == NULL) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_MALLOC_FAILURE); + goto done; + } + + if (BN_bn2binpad(a, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || BN_bn2binpad(b, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || !EC_POINT_get_affine_coordinates(group, + EC_GROUP_get0_generator(group), + xG, yG, ctx) + || BN_bn2binpad(xG, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || BN_bn2binpad(yG, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || !EC_POINT_get_affine_coordinates(group, + EC_KEY_get0_public_key(key), + xA, yA, ctx) + || BN_bn2binpad(xA, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || BN_bn2binpad(yA, buf, p_bytes) < 0 + || !EVP_DigestUpdate(hash, buf, p_bytes) + || !EVP_DigestFinal(hash, out, NULL)) { + SM2err(SM2_F_SM2_COMPUTE_Z_DIGEST, ERR_R_INTERNAL_ERROR); + goto done; + } + + rc = 1; + + done: + OPENSSL_free(buf); + BN_CTX_free(ctx); + EVP_MD_CTX_free(hash); + return rc; +} + +static BIGNUM *sm2_compute_msg_hash(const EVP_MD *digest, + const EC_KEY *key, + const uint8_t *id, + const size_t id_len, + const uint8_t *msg, size_t msg_len) +{ + EVP_MD_CTX *hash = EVP_MD_CTX_new(); + const int md_size = EVP_MD_size(digest); + uint8_t *z = NULL; + BIGNUM *e = NULL; + + if (md_size < 0) { + SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, SM2_R_INVALID_DIGEST); + goto done; + } + + z = OPENSSL_zalloc(md_size); + if (hash == NULL || z == NULL) { + SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_MALLOC_FAILURE); + goto done; + } + + if (!sm2_compute_z_digest(z, digest, id, id_len, key)) { + /* SM2err already called */ + goto done; + } + + if (!EVP_DigestInit(hash, digest) + || !EVP_DigestUpdate(hash, z, md_size) + || !EVP_DigestUpdate(hash, msg, msg_len) + /* reuse z buffer to hold H(Z || M) */ + || !EVP_DigestFinal(hash, z, NULL)) { + SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_EVP_LIB); + goto done; + } + + e = BN_bin2bn(z, md_size, NULL); + if (e == NULL) + SM2err(SM2_F_SM2_COMPUTE_MSG_HASH, ERR_R_INTERNAL_ERROR); + + done: + OPENSSL_free(z); + EVP_MD_CTX_free(hash); + return e; +} + +static ECDSA_SIG *sm2_sig_gen(const EC_KEY *key, const BIGNUM *e) +{ + const BIGNUM *dA = EC_KEY_get0_private_key(key); + const EC_GROUP *group = EC_KEY_get0_group(key); + const BIGNUM *order = EC_GROUP_get0_order(group); + ECDSA_SIG *sig = NULL; + EC_POINT *kG = NULL; + BN_CTX *ctx = NULL; + BIGNUM *k = NULL; + BIGNUM *rk = NULL; + BIGNUM *r = NULL; + BIGNUM *s = NULL; + BIGNUM *x1 = NULL; + BIGNUM *tmp = NULL; + + kG = EC_POINT_new(group); + ctx = BN_CTX_new(); + if (kG == NULL || ctx == NULL) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE); + goto done; + } + + BN_CTX_start(ctx); + k = BN_CTX_get(ctx); + rk = BN_CTX_get(ctx); + x1 = BN_CTX_get(ctx); + tmp = BN_CTX_get(ctx); + if (tmp == NULL) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE); + goto done; + } + + /* + * These values are returned and so should not be allocated out of the + * context + */ + r = BN_new(); + s = BN_new(); + + if (r == NULL || s == NULL) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE); + goto done; + } + + for (;;) { + if (!BN_priv_rand_range(k, order)) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR); + goto done; + } + + if (!EC_POINT_mul(group, kG, k, NULL, NULL, ctx) + || !EC_POINT_get_affine_coordinates(group, kG, x1, NULL, + ctx) + || !BN_mod_add(r, e, x1, order, ctx)) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR); + goto done; + } + + /* try again if r == 0 or r+k == n */ + if (BN_is_zero(r)) + continue; + + if (!BN_add(rk, r, k)) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_INTERNAL_ERROR); + goto done; + } + + if (BN_cmp(rk, order) == 0) + continue; + + if (!BN_add(s, dA, BN_value_one()) + || !ec_group_do_inverse_ord(group, s, s, ctx) + || !BN_mod_mul(tmp, dA, r, order, ctx) + || !BN_sub(tmp, k, tmp) + || !BN_mod_mul(s, s, tmp, order, ctx)) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_BN_LIB); + goto done; + } + + sig = ECDSA_SIG_new(); + if (sig == NULL) { + SM2err(SM2_F_SM2_SIG_GEN, ERR_R_MALLOC_FAILURE); + goto done; + } + + /* takes ownership of r and s */ + ECDSA_SIG_set0(sig, r, s); + break; + } + + done: + if (sig == NULL) { + BN_free(r); + BN_free(s); + } + + BN_CTX_free(ctx); + EC_POINT_free(kG); + return sig; +} + +static int sm2_sig_verify(const EC_KEY *key, const ECDSA_SIG *sig, + const BIGNUM *e) +{ + int ret = 0; + const EC_GROUP *group = EC_KEY_get0_group(key); + const BIGNUM *order = EC_GROUP_get0_order(group); + BN_CTX *ctx = NULL; + EC_POINT *pt = NULL; + BIGNUM *t = NULL; + BIGNUM *x1 = NULL; + const BIGNUM *r = NULL; + const BIGNUM *s = NULL; + + ctx = BN_CTX_new(); + pt = EC_POINT_new(group); + if (ctx == NULL || pt == NULL) { + SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE); + goto done; + } + + BN_CTX_start(ctx); + t = BN_CTX_get(ctx); + x1 = BN_CTX_get(ctx); + if (x1 == NULL) { + SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_MALLOC_FAILURE); + goto done; + } + + /* + * B1: verify whether r' in [1,n-1], verification failed if not + * B2: verify whether s' in [1,n-1], verification failed if not + * B3: set M'~=ZA || M' + * B4: calculate e'=Hv(M'~) + * B5: calculate t = (r' + s') modn, verification failed if t=0 + * B6: calculate the point (x1', y1')=[s']G + [t]PA + * B7: calculate R=(e'+x1') modn, verification pass if yes, otherwise failed + */ + + ECDSA_SIG_get0(sig, &r, &s); + + if (BN_cmp(r, BN_value_one()) < 0 + || BN_cmp(s, BN_value_one()) < 0 + || BN_cmp(order, r) <= 0 + || BN_cmp(order, s) <= 0) { + SM2err(SM2_F_SM2_SIG_VERIFY, SM2_R_BAD_SIGNATURE); + goto done; + } + + if (!BN_mod_add(t, r, s, order, ctx)) { + SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_BN_LIB); + goto done; + } + + if (BN_is_zero(t)) { + SM2err(SM2_F_SM2_SIG_VERIFY, SM2_R_BAD_SIGNATURE); + goto done; + } + + if (!EC_POINT_mul(group, pt, s, EC_KEY_get0_public_key(key), t, ctx) + || !EC_POINT_get_affine_coordinates(group, pt, x1, NULL, ctx)) { + SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_EC_LIB); + goto done; + } + + if (!BN_mod_add(t, e, x1, order, ctx)) { + SM2err(SM2_F_SM2_SIG_VERIFY, ERR_R_BN_LIB); + goto done; + } + + if (BN_cmp(r, t) == 0) + ret = 1; + + done: + EC_POINT_free(pt); + BN_CTX_free(ctx); + return ret; +} + +ECDSA_SIG *sm2_do_sign(const EC_KEY *key, + const EVP_MD *digest, + const uint8_t *id, + const size_t id_len, + const uint8_t *msg, size_t msg_len) +{ + BIGNUM *e = NULL; + ECDSA_SIG *sig = NULL; + + e = sm2_compute_msg_hash(digest, key, id, id_len, msg, msg_len); + if (e == NULL) { + /* SM2err already called */ + goto done; + } + + sig = sm2_sig_gen(key, e); + + done: + BN_free(e); + return sig; +} + +int sm2_do_verify(const EC_KEY *key, + const EVP_MD *digest, + const ECDSA_SIG *sig, + const uint8_t *id, + const size_t id_len, + const uint8_t *msg, size_t msg_len) +{ + BIGNUM *e = NULL; + int ret = 0; + + e = sm2_compute_msg_hash(digest, key, id, id_len, msg, msg_len); + if (e == NULL) { + /* SM2err already called */ + goto done; + } + + ret = sm2_sig_verify(key, sig, e); + + done: + BN_free(e); + return ret; +} + +int sm2_sign(const unsigned char *dgst, int dgstlen, + unsigned char *sig, unsigned int *siglen, EC_KEY *eckey) +{ + BIGNUM *e = NULL; + ECDSA_SIG *s = NULL; + int sigleni; + int ret = -1; + + e = BN_bin2bn(dgst, dgstlen, NULL); + if (e == NULL) { + SM2err(SM2_F_SM2_SIGN, ERR_R_BN_LIB); + goto done; + } + + s = sm2_sig_gen(eckey, e); + + sigleni = i2d_ECDSA_SIG(s, &sig); + if (sigleni < 0) { + SM2err(SM2_F_SM2_SIGN, ERR_R_INTERNAL_ERROR); + goto done; + } + *siglen = (unsigned int)sigleni; + + ret = 1; + + done: + ECDSA_SIG_free(s); + BN_free(e); + return ret; +} + +int sm2_verify(const unsigned char *dgst, int dgstlen, + const unsigned char *sig, int sig_len, EC_KEY *eckey) +{ + ECDSA_SIG *s = NULL; + BIGNUM *e = NULL; + const unsigned char *p = sig; + unsigned char *der = NULL; + int derlen = -1; + int ret = -1; + + s = ECDSA_SIG_new(); + if (s == NULL) { + SM2err(SM2_F_SM2_VERIFY, ERR_R_MALLOC_FAILURE); + goto done; + } + if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL) { + SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_ENCODING); + goto done; + } + /* Ensure signature uses DER and doesn't have trailing garbage */ + derlen = i2d_ECDSA_SIG(s, &der); + if (derlen != sig_len || memcmp(sig, der, derlen) != 0) { + SM2err(SM2_F_SM2_VERIFY, SM2_R_INVALID_ENCODING); + goto done; + } + + e = BN_bin2bn(dgst, dgstlen, NULL); + if (e == NULL) { + SM2err(SM2_F_SM2_VERIFY, ERR_R_BN_LIB); + goto done; + } + + ret = sm2_sig_verify(eckey, s, e); + + done: + OPENSSL_free(der); + BN_free(e); + ECDSA_SIG_free(s); + return ret; +} |