diff options
Diffstat (limited to 'roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_ameth.c')
| -rw-r--r-- | roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_ameth.c | 1120 |
1 files changed, 1120 insertions, 0 deletions
diff --git a/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_ameth.c b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_ameth.c new file mode 100644 index 000000000..6692a51ed --- /dev/null +++ b/roms/edk2/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_ameth.c @@ -0,0 +1,1120 @@ +/* + * Copyright 2006-2019 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 + */ + +#include <stdio.h> +#include "internal/cryptlib.h" +#include <openssl/asn1t.h> +#include <openssl/x509.h> +#include <openssl/bn.h> +#include <openssl/cms.h> +#include "crypto/asn1.h" +#include "crypto/evp.h" +#include "rsa_local.h" + +#ifndef OPENSSL_NO_CMS +static int rsa_cms_sign(CMS_SignerInfo *si); +static int rsa_cms_verify(CMS_SignerInfo *si); +static int rsa_cms_decrypt(CMS_RecipientInfo *ri); +static int rsa_cms_encrypt(CMS_RecipientInfo *ri); +#endif + +static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg); + +/* Set any parameters associated with pkey */ +static int rsa_param_encode(const EVP_PKEY *pkey, + ASN1_STRING **pstr, int *pstrtype) +{ + const RSA *rsa = pkey->pkey.rsa; + + *pstr = NULL; + /* If RSA it's just NULL type */ + if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) { + *pstrtype = V_ASN1_NULL; + return 1; + } + /* If no PSS parameters we omit parameters entirely */ + if (rsa->pss == NULL) { + *pstrtype = V_ASN1_UNDEF; + return 1; + } + /* Encode PSS parameters */ + if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL) + return 0; + + *pstrtype = V_ASN1_SEQUENCE; + return 1; +} +/* Decode any parameters and set them in RSA structure */ +static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg) +{ + const ASN1_OBJECT *algoid; + const void *algp; + int algptype; + + X509_ALGOR_get0(&algoid, &algptype, &algp, alg); + if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS) + return 1; + if (algptype == V_ASN1_UNDEF) + return 1; + if (algptype != V_ASN1_SEQUENCE) { + RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS); + return 0; + } + rsa->pss = rsa_pss_decode(alg); + if (rsa->pss == NULL) + return 0; + return 1; +} + +static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) +{ + unsigned char *penc = NULL; + int penclen; + ASN1_STRING *str; + int strtype; + + if (!rsa_param_encode(pkey, &str, &strtype)) + return 0; + penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); + if (penclen <= 0) + return 0; + if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), + strtype, str, penc, penclen)) + return 1; + + OPENSSL_free(penc); + return 0; +} + +static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) +{ + const unsigned char *p; + int pklen; + X509_ALGOR *alg; + RSA *rsa = NULL; + + if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey)) + return 0; + if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) { + RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); + return 0; + } + if (!rsa_param_decode(rsa, alg)) { + RSA_free(rsa); + return 0; + } + if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) { + RSA_free(rsa); + return 0; + } + return 1; +} + +static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) +{ + if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0 + || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0) + return 0; + return 1; +} + +static int old_rsa_priv_decode(EVP_PKEY *pkey, + const unsigned char **pder, int derlen) +{ + RSA *rsa; + + if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) { + RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); + return 0; + } + EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa); + return 1; +} + +static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) +{ + return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); +} + +static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) +{ + unsigned char *rk = NULL; + int rklen; + ASN1_STRING *str; + int strtype; + + if (!rsa_param_encode(pkey, &str, &strtype)) + return 0; + rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); + + if (rklen <= 0) { + RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); + ASN1_STRING_free(str); + return 0; + } + + if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, + strtype, str, rk, rklen)) { + RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); + ASN1_STRING_free(str); + return 0; + } + + return 1; +} + +static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) +{ + const unsigned char *p; + RSA *rsa; + int pklen; + const X509_ALGOR *alg; + + if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8)) + return 0; + rsa = d2i_RSAPrivateKey(NULL, &p, pklen); + if (rsa == NULL) { + RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB); + return 0; + } + if (!rsa_param_decode(rsa, alg)) { + RSA_free(rsa); + return 0; + } + EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa); + return 1; +} + +static int int_rsa_size(const EVP_PKEY *pkey) +{ + return RSA_size(pkey->pkey.rsa); +} + +static int rsa_bits(const EVP_PKEY *pkey) +{ + return BN_num_bits(pkey->pkey.rsa->n); +} + +static int rsa_security_bits(const EVP_PKEY *pkey) +{ + return RSA_security_bits(pkey->pkey.rsa); +} + +static void int_rsa_free(EVP_PKEY *pkey) +{ + RSA_free(pkey->pkey.rsa); +} + +static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) +{ + if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) + return NULL; + return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR), + alg->parameter); +} + +static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss, + int indent) +{ + int rv = 0; + X509_ALGOR *maskHash = NULL; + + if (!BIO_indent(bp, indent, 128)) + goto err; + if (pss_key) { + if (pss == NULL) { + if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0) + return 0; + return 1; + } else { + if (BIO_puts(bp, "PSS parameter restrictions:") <= 0) + return 0; + } + } else if (pss == NULL) { + if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0) + return 0; + return 1; + } + if (BIO_puts(bp, "\n") <= 0) + goto err; + if (pss_key) + indent += 2; + if (!BIO_indent(bp, indent, 128)) + goto err; + if (BIO_puts(bp, "Hash Algorithm: ") <= 0) + goto err; + + if (pss->hashAlgorithm) { + if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) + goto err; + } else if (BIO_puts(bp, "sha1 (default)") <= 0) { + goto err; + } + + if (BIO_puts(bp, "\n") <= 0) + goto err; + + if (!BIO_indent(bp, indent, 128)) + goto err; + + if (BIO_puts(bp, "Mask Algorithm: ") <= 0) + goto err; + if (pss->maskGenAlgorithm) { + if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) + goto err; + if (BIO_puts(bp, " with ") <= 0) + goto err; + maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); + if (maskHash != NULL) { + if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) + goto err; + } else if (BIO_puts(bp, "INVALID") <= 0) { + goto err; + } + } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) { + goto err; + } + BIO_puts(bp, "\n"); + + if (!BIO_indent(bp, indent, 128)) + goto err; + if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0) + goto err; + if (pss->saltLength) { + if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) + goto err; + } else if (BIO_puts(bp, "14 (default)") <= 0) { + goto err; + } + BIO_puts(bp, "\n"); + + if (!BIO_indent(bp, indent, 128)) + goto err; + if (BIO_puts(bp, "Trailer Field: 0x") <= 0) + goto err; + if (pss->trailerField) { + if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) + goto err; + } else if (BIO_puts(bp, "BC (default)") <= 0) { + goto err; + } + BIO_puts(bp, "\n"); + + rv = 1; + + err: + X509_ALGOR_free(maskHash); + return rv; + +} + +static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv) +{ + const RSA *x = pkey->pkey.rsa; + char *str; + const char *s; + int ret = 0, mod_len = 0, ex_primes; + + if (x->n != NULL) + mod_len = BN_num_bits(x->n); + ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos); + + if (!BIO_indent(bp, off, 128)) + goto err; + + if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0) + goto err; + + if (priv && x->d) { + if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n", + mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0) + goto err; + str = "modulus:"; + s = "publicExponent:"; + } else { + if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0) + goto err; + str = "Modulus:"; + s = "Exponent:"; + } + if (!ASN1_bn_print(bp, str, x->n, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, s, x->e, NULL, off)) + goto err; + if (priv) { + int i; + + if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off)) + goto err; + for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) { + /* print multi-prime info */ + BIGNUM *bn = NULL; + RSA_PRIME_INFO *pinfo; + int j; + + pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i); + for (j = 0; j < 3; j++) { + if (!BIO_indent(bp, off, 128)) + goto err; + switch (j) { + case 0: + if (BIO_printf(bp, "prime%d:", i + 3) <= 0) + goto err; + bn = pinfo->r; + break; + case 1: + if (BIO_printf(bp, "exponent%d:", i + 3) <= 0) + goto err; + bn = pinfo->d; + break; + case 2: + if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0) + goto err; + bn = pinfo->t; + break; + default: + break; + } + if (!ASN1_bn_print(bp, "", bn, NULL, off)) + goto err; + } + } + } + if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off)) + goto err; + ret = 1; + err: + return ret; +} + +static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return pkey_rsa_print(bp, pkey, indent, 0); +} + +static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return pkey_rsa_print(bp, pkey, indent, 1); +} + +static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg) +{ + RSA_PSS_PARAMS *pss; + + pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), + alg->parameter); + + if (pss == NULL) + return NULL; + + if (pss->maskGenAlgorithm != NULL) { + pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); + if (pss->maskHash == NULL) { + RSA_PSS_PARAMS_free(pss); + return NULL; + } + } + + return pss; +} + +static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, + const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) +{ + if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) { + int rv; + RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg); + + rv = rsa_pss_param_print(bp, 0, pss, indent); + RSA_PSS_PARAMS_free(pss); + if (!rv) + return 0; + } else if (!sig && BIO_puts(bp, "\n") <= 0) { + return 0; + } + if (sig) + return X509_signature_dump(bp, sig, indent); + return 1; +} + +static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) +{ + X509_ALGOR *alg = NULL; + const EVP_MD *md; + const EVP_MD *mgf1md; + int min_saltlen; + + switch (op) { + + case ASN1_PKEY_CTRL_PKCS7_SIGN: + if (arg1 == 0) + PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); + break; + + case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: + if (pkey_is_pss(pkey)) + return -2; + if (arg1 == 0) + PKCS7_RECIP_INFO_get0_alg(arg2, &alg); + break; +#ifndef OPENSSL_NO_CMS + case ASN1_PKEY_CTRL_CMS_SIGN: + if (arg1 == 0) + return rsa_cms_sign(arg2); + else if (arg1 == 1) + return rsa_cms_verify(arg2); + break; + + case ASN1_PKEY_CTRL_CMS_ENVELOPE: + if (pkey_is_pss(pkey)) + return -2; + if (arg1 == 0) + return rsa_cms_encrypt(arg2); + else if (arg1 == 1) + return rsa_cms_decrypt(arg2); + break; + + case ASN1_PKEY_CTRL_CMS_RI_TYPE: + if (pkey_is_pss(pkey)) + return -2; + *(int *)arg2 = CMS_RECIPINFO_TRANS; + return 1; +#endif + + case ASN1_PKEY_CTRL_DEFAULT_MD_NID: + if (pkey->pkey.rsa->pss != NULL) { + if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md, + &min_saltlen)) { + RSAerr(0, ERR_R_INTERNAL_ERROR); + return 0; + } + *(int *)arg2 = EVP_MD_type(md); + /* Return of 2 indicates this MD is mandatory */ + return 2; + } + *(int *)arg2 = NID_sha256; + return 1; + + default: + return -2; + + } + + if (alg) + X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); + + return 1; + +} + +/* allocate and set algorithm ID from EVP_MD, default SHA1 */ +static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) +{ + if (md == NULL || EVP_MD_type(md) == NID_sha1) + return 1; + *palg = X509_ALGOR_new(); + if (*palg == NULL) + return 0; + X509_ALGOR_set_md(*palg, md); + return 1; +} + +/* Allocate and set MGF1 algorithm ID from EVP_MD */ +static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) +{ + X509_ALGOR *algtmp = NULL; + ASN1_STRING *stmp = NULL; + + *palg = NULL; + if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1) + return 1; + /* need to embed algorithm ID inside another */ + if (!rsa_md_to_algor(&algtmp, mgf1md)) + goto err; + if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL) + goto err; + *palg = X509_ALGOR_new(); + if (*palg == NULL) + goto err; + X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); + stmp = NULL; + err: + ASN1_STRING_free(stmp); + X509_ALGOR_free(algtmp); + if (*palg) + return 1; + return 0; +} + +/* convert algorithm ID to EVP_MD, default SHA1 */ +static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) +{ + const EVP_MD *md; + + if (!alg) + return EVP_sha1(); + md = EVP_get_digestbyobj(alg->algorithm); + if (md == NULL) + RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST); + return md; +} + +/* + * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter, + * suitable for setting an AlgorithmIdentifier. + */ + +static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) +{ + const EVP_MD *sigmd, *mgf1md; + EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); + int saltlen; + + if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) + return NULL; + if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) + return NULL; + if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) + return NULL; + if (saltlen == -1) { + saltlen = EVP_MD_size(sigmd); + } else if (saltlen == -2 || saltlen == -3) { + saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; + if ((EVP_PKEY_bits(pk) & 0x7) == 1) + saltlen--; + if (saltlen < 0) + return NULL; + } + + return rsa_pss_params_create(sigmd, mgf1md, saltlen); +} + +RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, + const EVP_MD *mgf1md, int saltlen) +{ + RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new(); + + if (pss == NULL) + goto err; + if (saltlen != 20) { + pss->saltLength = ASN1_INTEGER_new(); + if (pss->saltLength == NULL) + goto err; + if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) + goto err; + } + if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) + goto err; + if (mgf1md == NULL) + mgf1md = sigmd; + if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) + goto err; + if (!rsa_md_to_algor(&pss->maskHash, mgf1md)) + goto err; + return pss; + err: + RSA_PSS_PARAMS_free(pss); + return NULL; +} + +static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx) +{ + RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx); + ASN1_STRING *os; + + if (pss == NULL) + return NULL; + + os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL); + RSA_PSS_PARAMS_free(pss); + return os; +} + +/* + * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL + * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are + * passed to pkctx instead. + */ + +static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, + X509_ALGOR *sigalg, EVP_PKEY *pkey) +{ + int rv = -1; + int saltlen; + const EVP_MD *mgf1md = NULL, *md = NULL; + RSA_PSS_PARAMS *pss; + + /* Sanity check: make sure it is PSS */ + if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) { + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); + return -1; + } + /* Decode PSS parameters */ + pss = rsa_pss_decode(sigalg); + + if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) { + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); + goto err; + } + + /* We have all parameters now set up context */ + if (pkey) { + if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) + goto err; + } else { + const EVP_MD *checkmd; + if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0) + goto err; + if (EVP_MD_type(md) != EVP_MD_type(checkmd)) { + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH); + goto err; + } + } + + if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) + goto err; + + if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) + goto err; + + if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) + goto err; + /* Carry on */ + rv = 1; + + err: + RSA_PSS_PARAMS_free(pss); + return rv; +} + +int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd, + const EVP_MD **pmgf1md, int *psaltlen) +{ + if (pss == NULL) + return 0; + *pmd = rsa_algor_to_md(pss->hashAlgorithm); + if (*pmd == NULL) + return 0; + *pmgf1md = rsa_algor_to_md(pss->maskHash); + if (*pmgf1md == NULL) + return 0; + if (pss->saltLength) { + *psaltlen = ASN1_INTEGER_get(pss->saltLength); + if (*psaltlen < 0) { + RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH); + return 0; + } + } else { + *psaltlen = 20; + } + + /* + * low-level routines support only trailer field 0xbc (value 1) and + * PKCS#1 says we should reject any other value anyway. + */ + if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { + RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER); + return 0; + } + + return 1; +} + +#ifndef OPENSSL_NO_CMS +static int rsa_cms_verify(CMS_SignerInfo *si) +{ + int nid, nid2; + X509_ALGOR *alg; + EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); + + CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); + nid = OBJ_obj2nid(alg->algorithm); + if (nid == EVP_PKEY_RSA_PSS) + return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); + /* Only PSS allowed for PSS keys */ + if (pkey_ctx_is_pss(pkctx)) { + RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE); + return 0; + } + if (nid == NID_rsaEncryption) + return 1; + /* Workaround for some implementation that use a signature OID */ + if (OBJ_find_sigid_algs(nid, NULL, &nid2)) { + if (nid2 == NID_rsaEncryption) + return 1; + } + return 0; +} +#endif + +/* + * Customised RSA item verification routine. This is called when a signature + * is encountered requiring special handling. We currently only handle PSS. + */ + +static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, + X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, + EVP_PKEY *pkey) +{ + /* Sanity check: make sure it is PSS */ + if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) { + RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); + return -1; + } + if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) { + /* Carry on */ + return 2; + } + return -1; +} + +#ifndef OPENSSL_NO_CMS +static int rsa_cms_sign(CMS_SignerInfo *si) +{ + int pad_mode = RSA_PKCS1_PADDING; + X509_ALGOR *alg; + EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si); + ASN1_STRING *os = NULL; + + CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg); + if (pkctx) { + if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) + return 0; + } + if (pad_mode == RSA_PKCS1_PADDING) { + X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); + return 1; + } + /* We don't support it */ + if (pad_mode != RSA_PKCS1_PSS_PADDING) + return 0; + os = rsa_ctx_to_pss_string(pkctx); + if (!os) + return 0; + X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os); + return 1; +} +#endif + +static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, + X509_ALGOR *alg1, X509_ALGOR *alg2, + ASN1_BIT_STRING *sig) +{ + int pad_mode; + EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx); + + if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) + return 0; + if (pad_mode == RSA_PKCS1_PADDING) + return 2; + if (pad_mode == RSA_PKCS1_PSS_PADDING) { + ASN1_STRING *os1 = NULL; + os1 = rsa_ctx_to_pss_string(pkctx); + if (!os1) + return 0; + /* Duplicate parameters if we have to */ + if (alg2) { + ASN1_STRING *os2 = ASN1_STRING_dup(os1); + if (!os2) { + ASN1_STRING_free(os1); + return 0; + } + X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS), + V_ASN1_SEQUENCE, os2); + } + X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS), + V_ASN1_SEQUENCE, os1); + return 3; + } + return 2; +} + +static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg, + const ASN1_STRING *sig) +{ + int rv = 0; + int mdnid, saltlen; + uint32_t flags; + const EVP_MD *mgf1md = NULL, *md = NULL; + RSA_PSS_PARAMS *pss; + + /* Sanity check: make sure it is PSS */ + if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) + return 0; + /* Decode PSS parameters */ + pss = rsa_pss_decode(sigalg); + if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) + goto err; + mdnid = EVP_MD_type(md); + /* + * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must + * match and salt length must equal digest size + */ + if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512) + && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md)) + flags = X509_SIG_INFO_TLS; + else + flags = 0; + /* Note: security bits half number of digest bits */ + X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4, + flags); + rv = 1; + err: + RSA_PSS_PARAMS_free(pss); + return rv; +} + +#ifndef OPENSSL_NO_CMS +static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg) +{ + RSA_OAEP_PARAMS *oaep; + + oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), + alg->parameter); + + if (oaep == NULL) + return NULL; + + if (oaep->maskGenFunc != NULL) { + oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc); + if (oaep->maskHash == NULL) { + RSA_OAEP_PARAMS_free(oaep); + return NULL; + } + } + return oaep; +} + +static int rsa_cms_decrypt(CMS_RecipientInfo *ri) +{ + EVP_PKEY_CTX *pkctx; + X509_ALGOR *cmsalg; + int nid; + int rv = -1; + unsigned char *label = NULL; + int labellen = 0; + const EVP_MD *mgf1md = NULL, *md = NULL; + RSA_OAEP_PARAMS *oaep; + + pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); + if (pkctx == NULL) + return 0; + if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg)) + return -1; + nid = OBJ_obj2nid(cmsalg->algorithm); + if (nid == NID_rsaEncryption) + return 1; + if (nid != NID_rsaesOaep) { + RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE); + return -1; + } + /* Decode OAEP parameters */ + oaep = rsa_oaep_decode(cmsalg); + + if (oaep == NULL) { + RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); + goto err; + } + + mgf1md = rsa_algor_to_md(oaep->maskHash); + if (mgf1md == NULL) + goto err; + md = rsa_algor_to_md(oaep->hashFunc); + if (md == NULL) + goto err; + + if (oaep->pSourceFunc != NULL) { + X509_ALGOR *plab = oaep->pSourceFunc; + + if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) { + RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE); + goto err; + } + if (plab->parameter->type != V_ASN1_OCTET_STRING) { + RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL); + goto err; + } + + label = plab->parameter->value.octet_string->data; + /* Stop label being freed when OAEP parameters are freed */ + plab->parameter->value.octet_string->data = NULL; + labellen = plab->parameter->value.octet_string->length; + } + + if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0) + goto err; + if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0) + goto err; + if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) + goto err; + if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0) + goto err; + /* Carry on */ + rv = 1; + + err: + RSA_OAEP_PARAMS_free(oaep); + return rv; +} + +static int rsa_cms_encrypt(CMS_RecipientInfo *ri) +{ + const EVP_MD *md, *mgf1md; + RSA_OAEP_PARAMS *oaep = NULL; + ASN1_STRING *os = NULL; + X509_ALGOR *alg; + EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); + int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen; + unsigned char *label; + + if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0) + return 0; + if (pkctx) { + if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) + return 0; + } + if (pad_mode == RSA_PKCS1_PADDING) { + X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0); + return 1; + } + /* Not supported */ + if (pad_mode != RSA_PKCS1_OAEP_PADDING) + return 0; + if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0) + goto err; + if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) + goto err; + labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label); + if (labellen < 0) + goto err; + oaep = RSA_OAEP_PARAMS_new(); + if (oaep == NULL) + goto err; + if (!rsa_md_to_algor(&oaep->hashFunc, md)) + goto err; + if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md)) + goto err; + if (labellen > 0) { + ASN1_OCTET_STRING *los; + oaep->pSourceFunc = X509_ALGOR_new(); + if (oaep->pSourceFunc == NULL) + goto err; + los = ASN1_OCTET_STRING_new(); + if (los == NULL) + goto err; + if (!ASN1_OCTET_STRING_set(los, label, labellen)) { + ASN1_OCTET_STRING_free(los); + goto err; + } + X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified), + V_ASN1_OCTET_STRING, los); + } + /* create string with pss parameter encoding. */ + if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os)) + goto err; + X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os); + os = NULL; + rv = 1; + err: + RSA_OAEP_PARAMS_free(oaep); + ASN1_STRING_free(os); + return rv; +} +#endif + +static int rsa_pkey_check(const EVP_PKEY *pkey) +{ + return RSA_check_key_ex(pkey->pkey.rsa, NULL); +} + +const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = { + { + EVP_PKEY_RSA, + EVP_PKEY_RSA, + ASN1_PKEY_SIGPARAM_NULL, + + "RSA", + "OpenSSL RSA method", + + rsa_pub_decode, + rsa_pub_encode, + rsa_pub_cmp, + rsa_pub_print, + + rsa_priv_decode, + rsa_priv_encode, + rsa_priv_print, + + int_rsa_size, + rsa_bits, + rsa_security_bits, + + 0, 0, 0, 0, 0, 0, + + rsa_sig_print, + int_rsa_free, + rsa_pkey_ctrl, + old_rsa_priv_decode, + old_rsa_priv_encode, + rsa_item_verify, + rsa_item_sign, + rsa_sig_info_set, + rsa_pkey_check + }, + + { + EVP_PKEY_RSA2, + EVP_PKEY_RSA, + ASN1_PKEY_ALIAS} +}; + +const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = { + EVP_PKEY_RSA_PSS, + EVP_PKEY_RSA_PSS, + ASN1_PKEY_SIGPARAM_NULL, + + "RSA-PSS", + "OpenSSL RSA-PSS method", + + rsa_pub_decode, + rsa_pub_encode, + rsa_pub_cmp, + rsa_pub_print, + + rsa_priv_decode, + rsa_priv_encode, + rsa_priv_print, + + int_rsa_size, + rsa_bits, + rsa_security_bits, + + 0, 0, 0, 0, 0, 0, + + rsa_sig_print, + int_rsa_free, + rsa_pkey_ctrl, + 0, 0, + rsa_item_verify, + rsa_item_sign, + 0, + rsa_pkey_check +}; |