int x509_rsa_ctx_to_pss(EVP_MD_CTX *ctx, X509_ALGOR *algor) { const EVP_MD *sigmd, *mgf1md; int saltlen; if (!EVP_PKEY_CTX_get_signature_md(ctx->pctx, &sigmd) || !EVP_PKEY_CTX_get_rsa_mgf1_md(ctx->pctx, &mgf1md) || !EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx->pctx, &saltlen)) { return 0; } EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(ctx->pctx); if (saltlen == -1) { saltlen = EVP_MD_size(sigmd); } else if (saltlen == -2) { saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) { saltlen--; } } else { return 0; } int ret = 0; ASN1_STRING *os = NULL; RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new(); if (!pss) { goto err; } if (saltlen != 20) { pss->saltLength = ASN1_INTEGER_new(); if (!pss->saltLength || !ASN1_INTEGER_set(pss->saltLength, saltlen)) { goto err; } } if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd) || !rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) { goto err; } /* Finally create string with pss parameter encoding. */ if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) { goto err; } X509_ALGOR_set0(algor, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); os = NULL; ret = 1; err: RSA_PSS_PARAMS_free(pss); ASN1_STRING_free(os); return ret; }
static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) { const EVP_MD *sigmd, *mgf1md; RSA_PSS_PARAMS *pss = NULL; ASN1_STRING *os = NULL; EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); int saltlen, rv = 0; if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) goto err; if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) goto err; if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) goto err; if (saltlen == -1) saltlen = EVP_MD_size(sigmd); else if (saltlen == -2) { saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) saltlen--; } pss = RSA_PSS_PARAMS_new(); if (!pss) goto err; if (saltlen != 20) { pss->saltLength = ASN1_INTEGER_new(); if (!pss->saltLength) goto err; if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) goto err; } if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) goto err; if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) goto err; /* Finally create string with pss parameter encoding. */ if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) goto err; rv = 1; err: if (pss) RSA_PSS_PARAMS_free(pss); if (rv) return os; if (os) ASN1_STRING_free(os); return NULL; }
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 = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; if ((EVP_PKEY_bits(pk) & 0x7) == 1) saltlen--; } return rsa_pss_params_create(sigmd, mgf1md, saltlen); }
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; CMS_RecipientInfo_ktri_get0_algs(ri, 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; } /* 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; }
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 = ctx->pctx; 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) { const EVP_MD *sigmd, *mgf1md; RSA_PSS_PARAMS *pss = NULL; X509_ALGOR *mgf1alg = NULL; ASN1_STRING *os1 = NULL, *os2 = NULL; EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); int saltlen, rv = 0; sigmd = EVP_MD_CTX_md(ctx); if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) goto err; if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) goto err; if (saltlen == -1) saltlen = EVP_MD_size(sigmd); else if (saltlen == -2) { saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) saltlen--; } pss = RSA_PSS_PARAMS_new(); if (!pss) goto err; if (saltlen != 20) { pss->saltLength = ASN1_INTEGER_new(); if (!pss->saltLength) goto err; if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) goto err; } if (EVP_MD_type(sigmd) != NID_sha1) { pss->hashAlgorithm = X509_ALGOR_new(); if (!pss->hashAlgorithm) goto err; X509_ALGOR_set_md(pss->hashAlgorithm, sigmd); } if (EVP_MD_type(mgf1md) != NID_sha1) { ASN1_STRING *stmp = NULL; /* need to embed algorithm ID inside another */ mgf1alg = X509_ALGOR_new(); X509_ALGOR_set_md(mgf1alg, mgf1md); if (!ASN1_item_pack(mgf1alg, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) goto err; pss->maskGenAlgorithm = X509_ALGOR_new(); if (!pss->maskGenAlgorithm) goto err; X509_ALGOR_set0(pss->maskGenAlgorithm, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); } /* Finally create string with pss parameter encoding. */ if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os1)) goto err; if (alg2) { os2 = ASN1_STRING_dup(os1); if (!os2) goto err; X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os2); } X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os1); os1 = os2 = NULL; rv = 3; err: if (mgf1alg) X509_ALGOR_free(mgf1alg); if (pss) RSA_PSS_PARAMS_free(pss); if (os1) ASN1_STRING_free(os1); return rv; } return 2; }