X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Frsa%2Frsa_lib.c;h=466115f7a0fc8248685043ea3e8e95e2807467df;hp=133ba2185c5b8713d4dcce7e1288029bedfc3c67;hb=8a758e96f2865f0aee417025630626f095bb3ae3;hpb=0122add6549c7d5671f77a81c5a32571a5d46f3f diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c index 133ba2185c..466115f7a0 100644 --- a/crypto/rsa/rsa_lib.c +++ b/crypto/rsa/rsa_lib.c @@ -1,25 +1,38 @@ /* - * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. * - * Licensed under the OpenSSL license (the "License"). You may not use + * Licensed under the Apache License 2.0 (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 */ +/* + * RSA low level APIs are deprecated for public use, but still ok for + * internal use. + */ +#include "internal/deprecated.h" + #include #include -#include "internal/cryptlib.h" -#include "internal/refcount.h" -#include "internal/bn_int.h" +#include #include #include -#include "internal/evp_int.h" -#include "rsa_locl.h" +#include "internal/cryptlib.h" +#include "internal/refcount.h" +#include "openssl/param_build.h" +#include "crypto/bn.h" +#include "crypto/evp.h" +#include "crypto/rsa.h" +#include "crypto/security_bits.h" +#include "rsa_local.h" + +static RSA *rsa_new_intern(ENGINE *engine, OPENSSL_CTX *libctx); +#ifndef FIPS_MODULE RSA *RSA_new(void) { - return RSA_new_method(NULL); + return rsa_new_intern(NULL, NULL); } const RSA_METHOD *RSA_get_method(const RSA *rsa) @@ -48,28 +61,40 @@ int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) } RSA *RSA_new_method(ENGINE *engine) +{ + return rsa_new_intern(engine, NULL); +} +#endif + +RSA *rsa_new_with_ctx(OPENSSL_CTX *libctx) +{ + return rsa_new_intern(NULL, libctx); +} + +static RSA *rsa_new_intern(ENGINE *engine, OPENSSL_CTX *libctx) { RSA *ret = OPENSSL_zalloc(sizeof(*ret)); if (ret == NULL) { - RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + RSAerr(0, ERR_R_MALLOC_FAILURE); return NULL; } ret->references = 1; ret->lock = CRYPTO_THREAD_lock_new(); if (ret->lock == NULL) { - RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + RSAerr(0, ERR_R_MALLOC_FAILURE); OPENSSL_free(ret); return NULL; } + ret->libctx = libctx; ret->meth = RSA_get_default_method(); -#ifndef OPENSSL_NO_ENGINE +#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; if (engine) { if (!ENGINE_init(engine)) { - RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); + RSAerr(0, ERR_R_ENGINE_LIB); goto err; } ret->engine = engine; @@ -79,25 +104,27 @@ RSA *RSA_new_method(ENGINE *engine) if (ret->engine) { ret->meth = ENGINE_get_RSA(ret->engine); if (ret->meth == NULL) { - RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); + RSAerr(0, ERR_R_ENGINE_LIB); goto err; } } #endif ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; +#ifndef FIPS_MODULE if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { goto err; } +#endif if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { - RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_INIT_FAIL); + RSAerr(0, ERR_R_INIT_FAIL); goto err; } return ret; -err: + err: RSA_free(ret); return NULL; } @@ -115,26 +142,30 @@ void RSA_free(RSA *r) return; REF_ASSERT_ISNT(i < 0); - if (r->meth->finish) + if (r->meth != NULL && r->meth->finish != NULL) r->meth->finish(r); -#ifndef OPENSSL_NO_ENGINE +#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) ENGINE_finish(r->engine); #endif +#ifndef FIPS_MODULE CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); +#endif CRYPTO_THREAD_lock_free(r->lock); - BN_clear_free(r->n); - BN_clear_free(r->e); + BN_free(r->n); + BN_free(r->e); BN_clear_free(r->d); BN_clear_free(r->p); BN_clear_free(r->q); BN_clear_free(r->dmp1); BN_clear_free(r->dmq1); BN_clear_free(r->iqmp); +#ifndef FIPS_MODULE RSA_PSS_PARAMS_free(r->pss); sk_RSA_PRIME_INFO_pop_free(r->prime_infos, rsa_multip_info_free); +#endif BN_BLINDING_free(r->blinding); BN_BLINDING_free(r->mt_blinding); OPENSSL_free(r->bignum_data); @@ -153,6 +184,12 @@ int RSA_up_ref(RSA *r) return i > 1 ? 1 : 0; } +OPENSSL_CTX *rsa_get0_libctx(RSA *r) +{ + return r->libctx; +} + +#ifndef FIPS_MODULE int RSA_set_ex_data(RSA *r, int idx, void *arg) { return CRYPTO_set_ex_data(&r->ex_data, idx, arg); @@ -162,11 +199,151 @@ void *RSA_get_ex_data(const RSA *r, int idx) { return CRYPTO_get_ex_data(&r->ex_data, idx); } +#endif + +/* + * Define a scaling constant for our fixed point arithmetic. + * This value must be a power of two because the base two logarithm code + * makes this assumption. The exponent must also be a multiple of three so + * that the scale factor has an exact cube root. Finally, the scale factor + * should not be so large that a multiplication of two scaled numbers + * overflows a 64 bit unsigned integer. + */ +static const unsigned int scale = 1 << 18; +static const unsigned int cbrt_scale = 1 << (2 * 18 / 3); + +/* Define some constants, none exceed 32 bits */ +static const unsigned int log_2 = 0x02c5c8; /* scale * log(2) */ +static const unsigned int log_e = 0x05c551; /* scale * log2(M_E) */ +static const unsigned int c1_923 = 0x07b126; /* scale * 1.923 */ +static const unsigned int c4_690 = 0x12c28f; /* scale * 4.690 */ + +/* + * Multiply two scaled integers together and rescale the result. + */ +static ossl_inline uint64_t mul2(uint64_t a, uint64_t b) +{ + return a * b / scale; +} + +/* + * Calculate the cube root of a 64 bit scaled integer. + * Although the cube root of a 64 bit number does fit into a 32 bit unsigned + * integer, this is not guaranteed after scaling, so this function has a + * 64 bit return. This uses the shifting nth root algorithm with some + * algebraic simplifications. + */ +static uint64_t icbrt64(uint64_t x) +{ + uint64_t r = 0; + uint64_t b; + int s; + + for (s = 63; s >= 0; s -= 3) { + r <<= 1; + b = 3 * r * (r + 1) + 1; + if ((x >> s) >= b) { + x -= b << s; + r++; + } + } + return r * cbrt_scale; +} + +/* + * Calculate the natural logarithm of a 64 bit scaled integer. + * This is done by calculating a base two logarithm and scaling. + * The maximum logarithm (base 2) is 64 and this reduces base e, so + * a 32 bit result should not overflow. The argument passed must be + * greater than unity so we don't need to handle negative results. + */ +static uint32_t ilog_e(uint64_t v) +{ + uint32_t i, r = 0; + + /* + * Scale down the value into the range 1 .. 2. + * + * If fractional numbers need to be processed, another loop needs + * to go here that checks v < scale and if so multiplies it by 2 and + * reduces r by scale. This also means making r signed. + */ + while (v >= 2 * scale) { + v >>= 1; + r += scale; + } + for (i = scale / 2; i != 0; i /= 2) { + v = mul2(v, v); + if (v >= 2 * scale) { + v >>= 1; + r += i; + } + } + r = (r * (uint64_t)scale) / log_e; + return r; +} + +/* + * NIST SP 800-56B rev 2 Appendix D: Maximum Security Strength Estimates for IFC + * Modulus Lengths. + * + * Note that this formula is also referred to in SP800-56A rev3 Appendix D: + * for FFC safe prime groups for modp and ffdhe. + * After Table 25 and Table 26 it refers to + * "The maximum security strength estimates were calculated using the formula in + * Section 7.5 of the FIPS 140 IG and rounded to the nearest multiple of eight + * bits". + * + * The formula is: + * + * E = \frac{1.923 \sqrt[3]{nBits \cdot log_e(2)} + * \cdot(log_e(nBits \cdot log_e(2))^{2/3} - 4.69}{log_e(2)} + * The two cube roots are merged together here. + */ +uint16_t ifc_ffc_compute_security_bits(int n) +{ + uint64_t x; + uint32_t lx; + uint16_t y; + + /* Look for common values as listed in SP 800-56B rev 2 Appendix D */ + switch (n) { + case 2048: + return 112; + case 3072: + return 128; + case 4096: + return 152; + case 6144: + return 176; + case 8192: + return 200; + } + /* + * The first incorrect result (i.e. not accurate or off by one low) occurs + * for n = 699668. The true value here is 1200. Instead of using this n + * as the check threshold, the smallest n such that the correct result is + * 1200 is used instead. + */ + if (n >= 687737) + return 1200; + if (n < 8) + return 0; + + x = n * (uint64_t)log_2; + lx = ilog_e(x); + y = (uint16_t)((mul2(c1_923, icbrt64(mul2(mul2(x, lx), lx))) - c4_690) + / log_2); + return (y + 4) & ~7; +} + + int RSA_security_bits(const RSA *rsa) { int bits = BN_num_bits(rsa->n); +#ifndef FIPS_MODULE if (rsa->version == RSA_ASN1_VERSION_MULTI) { /* This ought to mean that we have private key at hand. */ int ex_primes = sk_RSA_PRIME_INFO_num(rsa->prime_infos); @@ -174,7 +351,8 @@ int RSA_security_bits(const RSA *rsa) if (ex_primes <= 0 || (ex_primes + 2) > rsa_multip_cap(bits)) return 0; } - return BN_security_bits(bits, -1); +#endif + return ifc_ffc_compute_security_bits(bits); } int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) @@ -196,9 +374,11 @@ int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) r->e = e; } if (d != NULL) { - BN_free(r->d); + BN_clear_free(r->d); r->d = d; + BN_set_flags(r->d, BN_FLG_CONSTTIME); } + r->dirty_cnt++; return 1; } @@ -213,13 +393,16 @@ int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) return 0; if (p != NULL) { - BN_free(r->p); + BN_clear_free(r->p); r->p = p; + BN_set_flags(r->p, BN_FLG_CONSTTIME); } if (q != NULL) { - BN_free(r->q); + BN_clear_free(r->q); r->q = q; + BN_set_flags(r->q, BN_FLG_CONSTTIME); } + r->dirty_cnt++; return 1; } @@ -235,21 +418,26 @@ int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) return 0; if (dmp1 != NULL) { - BN_free(r->dmp1); + BN_clear_free(r->dmp1); r->dmp1 = dmp1; + BN_set_flags(r->dmp1, BN_FLG_CONSTTIME); } if (dmq1 != NULL) { - BN_free(r->dmq1); + BN_clear_free(r->dmq1); r->dmq1 = dmq1; + BN_set_flags(r->dmq1, BN_FLG_CONSTTIME); } if (iqmp != NULL) { - BN_free(r->iqmp); + BN_clear_free(r->iqmp); r->iqmp = iqmp; + BN_set_flags(r->iqmp, BN_FLG_CONSTTIME); } + r->dirty_cnt++; return 1; } +#ifndef FIPS_MODULE /* * Is it better to export RSA_PRIME_INFO structure * and related functions to let user pass a triplet? @@ -276,12 +464,15 @@ int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[], if (pinfo == NULL) goto err; if (primes[i] != NULL && exps[i] != NULL && coeffs[i] != NULL) { - BN_free(pinfo->r); - BN_free(pinfo->d); - BN_free(pinfo->t); + BN_clear_free(pinfo->r); + BN_clear_free(pinfo->d); + BN_clear_free(pinfo->t); pinfo->r = primes[i]; pinfo->d = exps[i]; pinfo->t = coeffs[i]; + BN_set_flags(pinfo->r, BN_FLG_CONSTTIME); + BN_set_flags(pinfo->d, BN_FLG_CONSTTIME); + BN_set_flags(pinfo->t, BN_FLG_CONSTTIME); } else { rsa_multip_info_free(pinfo); goto err; @@ -307,6 +498,7 @@ int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[], } r->version = RSA_ASN1_VERSION_MULTI; + r->dirty_cnt++; return 1; err: @@ -314,6 +506,7 @@ int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[], sk_RSA_PRIME_INFO_pop_free(prime_infos, rsa_multip_info_free_ex); return 0; } +#endif void RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) @@ -334,6 +527,7 @@ void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) *q = r->q; } +#ifndef FIPS_MODULE int RSA_get_multi_prime_extra_count(const RSA *r) { int pnum; @@ -363,6 +557,7 @@ int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[]) return 1; } +#endif void RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1, @@ -376,6 +571,7 @@ void RSA_get0_crt_params(const RSA *r, *iqmp = r->iqmp; } +#ifndef FIPS_MODULE int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[], const BIGNUM *coeffs[]) { @@ -401,6 +597,62 @@ int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[], return 1; } +#endif + +const BIGNUM *RSA_get0_n(const RSA *r) +{ + return r->n; +} + +const BIGNUM *RSA_get0_e(const RSA *r) +{ + return r->e; +} + +const BIGNUM *RSA_get0_d(const RSA *r) +{ + return r->d; +} + +const BIGNUM *RSA_get0_p(const RSA *r) +{ + return r->p; +} + +const BIGNUM *RSA_get0_q(const RSA *r) +{ + return r->q; +} + +const BIGNUM *RSA_get0_dmp1(const RSA *r) +{ + return r->dmp1; +} + +const BIGNUM *RSA_get0_dmq1(const RSA *r) +{ + return r->dmq1; +} + +const BIGNUM *RSA_get0_iqmp(const RSA *r) +{ + return r->iqmp; +} + +const RSA_PSS_PARAMS *RSA_get0_pss_params(const RSA *r) +{ +#ifdef FIPS_MODULE + return NULL; +#else + return r->pss; +#endif +} + +/* Internal */ +RSA_PSS_PARAMS_30 *rsa_get0_pss_params_30(RSA *r) +{ + return &r->pss_params; +} void RSA_clear_flags(RSA *r, int flags) { @@ -423,6 +675,7 @@ int RSA_get_version(RSA *r) return r->version; } +#ifndef FIPS_MODULE ENGINE *RSA_get0_engine(const RSA *r) { return r->engine; @@ -437,3 +690,686 @@ int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2) return -1; return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2); } +#endif + +DEFINE_STACK_OF(BIGNUM) + +int rsa_set0_all_params(RSA *r, const STACK_OF(BIGNUM) *primes, + const STACK_OF(BIGNUM) *exps, + const STACK_OF(BIGNUM) *coeffs) +{ +#ifndef FIPS_MODULE + STACK_OF(RSA_PRIME_INFO) *prime_infos, *old_infos = NULL; +#endif + int pnum; + + if (primes == NULL || exps == NULL || coeffs == NULL) + return 0; + + pnum = sk_BIGNUM_num(primes); + if (pnum < 2 + || pnum != sk_BIGNUM_num(exps) + || pnum != sk_BIGNUM_num(coeffs) + 1) + return 0; + + if (!RSA_set0_factors(r, sk_BIGNUM_value(primes, 0), + sk_BIGNUM_value(primes, 1)) + || !RSA_set0_crt_params(r, sk_BIGNUM_value(exps, 0), + sk_BIGNUM_value(exps, 1), + sk_BIGNUM_value(coeffs, 0))) + return 0; + +#ifndef FIPS_MODULE + old_infos = r->prime_infos; +#endif + + if (pnum > 2) { +#ifndef FIPS_MODULE + int i; + + prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum); + if (prime_infos == NULL) + return 0; + + for (i = 2; i < pnum; i++) { + BIGNUM *prime = sk_BIGNUM_value(primes, i); + BIGNUM *exp = sk_BIGNUM_value(exps, i); + BIGNUM *coeff = sk_BIGNUM_value(coeffs, i - 1); + RSA_PRIME_INFO *pinfo = NULL; + + if (!ossl_assert(prime != NULL && exp != NULL && coeff != NULL)) + goto err; + + /* Using rsa_multip_info_new() is wasteful, so allocate directly */ + if ((pinfo = OPENSSL_zalloc(sizeof(*pinfo))) == NULL) { + ERR_raise(ERR_LIB_RSA, ERR_R_MALLOC_FAILURE); + goto err; + } + + pinfo->r = prime; + pinfo->d = exp; + pinfo->t = coeff; + BN_set_flags(pinfo->r, BN_FLG_CONSTTIME); + BN_set_flags(pinfo->d, BN_FLG_CONSTTIME); + BN_set_flags(pinfo->t, BN_FLG_CONSTTIME); + (void)sk_RSA_PRIME_INFO_push(prime_infos, pinfo); + } + + r->prime_infos = prime_infos; + + if (!rsa_multip_calc_product(r)) { + r->prime_infos = old_infos; + goto err; + } +#else + return 0; +#endif + } + +#ifndef FIPS_MODULE + if (old_infos != NULL) { + /* + * This is hard to deal with, since the old infos could + * also be set by this function and r, d, t should not + * be freed in that case. So currently, stay consistent + * with other *set0* functions: just free it... + */ + sk_RSA_PRIME_INFO_pop_free(old_infos, rsa_multip_info_free); + } +#endif + + r->version = pnum > 2 ? RSA_ASN1_VERSION_MULTI : RSA_ASN1_VERSION_DEFAULT; + r->dirty_cnt++; + + return 1; +#ifndef FIPS_MODULE + err: + /* r, d, t should not be freed */ + sk_RSA_PRIME_INFO_pop_free(prime_infos, rsa_multip_info_free_ex); + return 0; +#endif +} + +DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM) + +int rsa_get0_all_params(RSA *r, STACK_OF(BIGNUM_const) *primes, + STACK_OF(BIGNUM_const) *exps, + STACK_OF(BIGNUM_const) *coeffs) +{ +#ifndef FIPS_MODULE + RSA_PRIME_INFO *pinfo; + int i, pnum; +#endif + + if (r == NULL) + return 0; + + /* If |p| is NULL, there are no CRT parameters */ + if (RSA_get0_p(r) == NULL) + return 1; + + sk_BIGNUM_const_push(primes, RSA_get0_p(r)); + sk_BIGNUM_const_push(primes, RSA_get0_q(r)); + sk_BIGNUM_const_push(exps, RSA_get0_dmp1(r)); + sk_BIGNUM_const_push(exps, RSA_get0_dmq1(r)); + sk_BIGNUM_const_push(coeffs, RSA_get0_iqmp(r)); + +#ifndef FIPS_MODULE + pnum = RSA_get_multi_prime_extra_count(r); + for (i = 0; i < pnum; i++) { + pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i); + sk_BIGNUM_const_push(primes, pinfo->r); + sk_BIGNUM_const_push(exps, pinfo->d); + sk_BIGNUM_const_push(coeffs, pinfo->t); + } +#endif + + return 1; +} + +#ifndef FIPS_MODULE +int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int pad_mode) +{ + OSSL_PARAM pad_params[2], *p = pad_params; + + if (ctx == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if ((!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + || ctx->op.ciph.ciphprovctx == NULL) + && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + || ctx->op.sig.sigprovctx == NULL)) + return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_RSA_PADDING, + pad_mode, NULL); + + *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_PAD_MODE, &pad_mode); + *p++ = OSSL_PARAM_construct_end(); + + return EVP_PKEY_CTX_set_params(ctx, pad_params); +} + +int EVP_PKEY_CTX_get_rsa_padding(EVP_PKEY_CTX *ctx, int *pad_mode) +{ + OSSL_PARAM pad_params[2], *p = pad_params; + + if (ctx == NULL || pad_mode == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if ((!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + || ctx->op.ciph.ciphprovctx == NULL) + && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + || ctx->op.sig.sigprovctx == NULL)) + return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_GET_RSA_PADDING, 0, + pad_mode); + + *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_PAD_MODE, pad_mode); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_get_params(ctx, pad_params)) + return 0; + + return 1; + +} + +int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) +{ + const char *name; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.ciph.ciphprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)md); + + name = (md == NULL) ? "" : EVP_MD_name(md); + + return EVP_PKEY_CTX_set_rsa_oaep_md_name(ctx, name, NULL); +} + +int EVP_PKEY_CTX_set_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, const char *mdname, + const char *mdprops) +{ + OSSL_PARAM rsa_params[3], *p = rsa_params; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + + *p++ = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, + /* + * Cast away the const. This is read + * only so should be safe + */ + (char *)mdname, 0); + if (mdprops != NULL) { + *p++ = OSSL_PARAM_construct_utf8_string( + OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, + /* + * Cast away the const. This is read + * only so should be safe + */ + (char *)mdprops, 0); + } + *p++ = OSSL_PARAM_construct_end(); + + return EVP_PKEY_CTX_set_params(ctx, rsa_params); +} + +int EVP_PKEY_CTX_get_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, char *name, + size_t namelen) +{ + OSSL_PARAM rsa_params[2], *p = rsa_params; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + *p++ = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, + name, namelen); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_get_params(ctx, rsa_params)) + return -1; + + return 1; +} + +int EVP_PKEY_CTX_get_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD **md) +{ + /* 80 should be big enough */ + char name[80] = ""; + + if (ctx == NULL || md == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.ciph.ciphprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void *)md); + + if (EVP_PKEY_CTX_get_rsa_oaep_md_name(ctx, name, sizeof(name)) <= 0) + return -1; + + /* May be NULL meaning "unknown" */ + *md = EVP_get_digestbyname(name); + + return 1; +} + +int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) +{ + const char *name; + + if (ctx == NULL + || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if ((EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && ctx->op.ciph.ciphprovctx == NULL) + || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + && ctx->op.sig.sigprovctx == NULL)) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, + EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)md); + + name = (md == NULL) ? "" : EVP_MD_name(md); + + return EVP_PKEY_CTX_set_rsa_mgf1_md_name(ctx, name, NULL); +} + +int EVP_PKEY_CTX_set_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, const char *mdname, + const char *mdprops) +{ + OSSL_PARAM rsa_params[3], *p = rsa_params; + + if (ctx == NULL + || mdname == NULL + || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_DIGEST, + /* + * Cast away the const. This is + * read only so should be safe + */ + (char *)mdname, 0); + if (mdprops != NULL) { + *p++ = + OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_PROPERTIES, + /* + * Cast away the const. This is + * read only so should be safe + */ + (char *)mdprops, 0); + } + *p++ = OSSL_PARAM_construct_end(); + + return EVP_PKEY_CTX_set_params(ctx, rsa_params); +} + +int EVP_PKEY_CTX_get_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, char *name, + size_t namelen) +{ + OSSL_PARAM rsa_params[2], *p = rsa_params; + + if (ctx == NULL + || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_DIGEST, + name, namelen); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_get_params(ctx, rsa_params)) + return -1; + + return 1; +} + +int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD **md) +{ + /* 80 should be big enough */ + char name[80] = ""; + + if (ctx == NULL + || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if ((EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx) + && ctx->op.ciph.ciphprovctx == NULL) + || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + && ctx->op.sig.sigprovctx == NULL)) + return EVP_PKEY_CTX_ctrl(ctx, -1, + EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)md); + + if (EVP_PKEY_CTX_get_rsa_mgf1_md_name(ctx, name, sizeof(name)) <= 0) + return -1; + + /* May be NULL meaning "unknown" */ + *md = EVP_get_digestbyname(name); + + return 1; +} + +int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, void *label, int llen) +{ + OSSL_PARAM rsa_params[2], *p = rsa_params; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.ciph.ciphprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen, + (void *)label); + + *p++ = OSSL_PARAM_construct_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, + /* + * Cast away the const. This is + * read only so should be safe + */ + (void *)label, + (size_t)llen); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_set_params(ctx, rsa_params)) + return 0; + + OPENSSL_free(label); + return 1; +} + +int EVP_PKEY_CTX_get0_rsa_oaep_label(EVP_PKEY_CTX *ctx, unsigned char **label) +{ + OSSL_PARAM rsa_params[3], *p = rsa_params; + size_t labellen; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.ciph.ciphprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, + EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0, + (void *)label); + + *p++ = OSSL_PARAM_construct_octet_ptr(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, + (void **)label, 0); + *p++ = OSSL_PARAM_construct_size_t(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN, + &labellen); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_get_params(ctx, rsa_params)) + return -1; + + if (labellen > INT_MAX) + return -1; + + return (int)labellen; +} + +int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int saltlen) +{ + OSSL_PARAM pad_params[2], *p = pad_params; + + if (ctx == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + || ctx->op.sig.sigprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_RSA_PSS_SALTLEN, + saltlen, NULL); + + *p++ = + OSSL_PARAM_construct_int(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, &saltlen); + *p++ = OSSL_PARAM_construct_end(); + + return EVP_PKEY_CTX_set_params(ctx, pad_params); +} + +int EVP_PKEY_CTX_get_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int *saltlen) +{ + OSSL_PARAM pad_params[2], *p = pad_params; + + if (ctx == NULL || saltlen == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA or RSA-PSS return error */ + if (ctx->pmeth != NULL + && ctx->pmeth->pkey_id != EVP_PKEY_RSA + && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx) + || ctx->op.sig.sigprovctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, -1, -1, + EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, + 0, saltlen); + + *p++ = + OSSL_PARAM_construct_int(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, saltlen); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_get_params(ctx, pad_params)) + return 0; + + return 1; + +} + +int EVP_PKEY_CTX_set_rsa_keygen_bits(EVP_PKEY_CTX *ctx, int bits) +{ + OSSL_PARAM params[2], *p = params; + size_t bits2 = bits; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.keymgmt.genctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_KEYGEN, + EVP_PKEY_CTRL_RSA_KEYGEN_BITS, bits, NULL); + + *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_RSA_BITS, &bits2); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_set_params(ctx, params)) + return 0; + + return 1; +} + +int EVP_PKEY_CTX_set_rsa_keygen_pubexp(EVP_PKEY_CTX *ctx, BIGNUM *pubexp) +{ + OSSL_PARAM_BLD *tmpl; + OSSL_PARAM *params; + int ret; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.keymgmt.genctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_KEYGEN, + EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP, 0, pubexp); + + if ((tmpl = OSSL_PARAM_BLD_new()) == NULL) + return 0; + if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_RSA_E, pubexp) + || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { + OSSL_PARAM_BLD_free(tmpl); + return 0; + } + OSSL_PARAM_BLD_free(tmpl); + + ret = EVP_PKEY_CTX_set_params(ctx, params); + OSSL_PARAM_BLD_free_params(params); + return ret; +} + +int EVP_PKEY_CTX_set_rsa_keygen_primes(EVP_PKEY_CTX *ctx, int primes) +{ + OSSL_PARAM params[2], *p = params; + size_t primes2 = primes; + + if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) { + ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED); + /* Uses the same return values as EVP_PKEY_CTX_ctrl */ + return -2; + } + + /* If key type not RSA return error */ + if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA) + return -1; + + /* TODO(3.0): Remove this eventually when no more legacy */ + if (ctx->op.keymgmt.genctx == NULL) + return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_KEYGEN, + EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES, primes, + NULL); + + *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_RSA_PRIMES, &primes2); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_set_params(ctx, params)) + return 0; + + return 1; +} +#endif