From: Dr. Stephen Henson Date: Wed, 19 Jun 2013 17:21:37 +0000 (+0100) Subject: CMS RSA-OAEP and RSA-PSS support. X-Git-Tag: master-pre-reformat~1226 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0574cadf857b19485465b9d71b7dec9549857a4d;p=openssl CMS RSA-OAEP and RSA-PSS support. Extend RSA ASN1 method to support CMS PSS signatures for both sign and verify. For signing the EVP_PKEY_CTX parameters are read and the appropriate CMS structures set up. For verification the CMS structures are analysed and the corresponding parameters in the EVP_PKEY_CTX set. Also add RSA-OAEP support. For encrypt the EVP_PKEY_CTX parameters are used. For decrypt the CMS structure is uses to set the appropriate EVP_PKEY_CTX parameters. --- diff --git a/crypto/rsa/rsa.h b/crypto/rsa/rsa.h index 38771fbafb..41a052a3ee 100644 --- a/crypto/rsa/rsa.h +++ b/crypto/rsa/rsa.h @@ -365,6 +365,15 @@ typedef struct rsa_pss_params_st DECLARE_ASN1_FUNCTIONS(RSA_PSS_PARAMS) +typedef struct rsa_oaep_params_st + { + X509_ALGOR *hashFunc; + X509_ALGOR *maskGenFunc; + X509_ALGOR *pSourceFunc; + } RSA_OAEP_PARAMS; + +DECLARE_ASN1_FUNCTIONS(RSA_OAEP_PARAMS) + #ifndef OPENSSL_NO_FP_API int RSA_print_fp(FILE *fp, const RSA *r,int offset); #endif @@ -509,8 +518,10 @@ void ERR_load_RSA_strings(void); #define RSA_F_PKEY_RSA_CTRL_STR 144 #define RSA_F_PKEY_RSA_SIGN 142 #define RSA_F_PKEY_RSA_VERIFYRECOVER 141 +#define RSA_F_RSA_ALGOR_TO_MD 156 #define RSA_F_RSA_BUILTIN_KEYGEN 129 #define RSA_F_RSA_CHECK_KEY 123 +#define RSA_F_RSA_CMS_DECRYPT 159 #define RSA_F_RSA_EAY_PRIVATE_DECRYPT 101 #define RSA_F_RSA_EAY_PRIVATE_ENCRYPT 102 #define RSA_F_RSA_EAY_PUBLIC_DECRYPT 103 @@ -518,6 +529,7 @@ void ERR_load_RSA_strings(void); #define RSA_F_RSA_GENERATE_KEY 105 #define RSA_F_RSA_ITEM_VERIFY 148 #define RSA_F_RSA_MEMORY_LOCK 130 +#define RSA_F_RSA_MGF1_TO_MD 157 #define RSA_F_RSA_NEW_METHOD 106 #define RSA_F_RSA_NULL 124 #define RSA_F_RSA_NULL_MOD_EXP 131 @@ -525,6 +537,7 @@ void ERR_load_RSA_strings(void); #define RSA_F_RSA_NULL_PRIVATE_ENCRYPT 133 #define RSA_F_RSA_NULL_PUBLIC_DECRYPT 134 #define RSA_F_RSA_NULL_PUBLIC_ENCRYPT 135 +#define RSA_F_RSA_OAEP_TO_CTX 158 #define RSA_F_RSA_PADDING_ADD_NONE 107 #define RSA_F_RSA_PADDING_ADD_PKCS1_OAEP 121 #define RSA_F_RSA_PADDING_ADD_PKCS1_OAEP_MGF1 154 @@ -545,6 +558,7 @@ void ERR_load_RSA_strings(void); #define RSA_F_RSA_PRINT_FP 116 #define RSA_F_RSA_PRIV_DECODE 137 #define RSA_F_RSA_PRIV_ENCODE 138 +#define RSA_F_RSA_PSS_TO_CTX 155 #define RSA_F_RSA_PUB_DECODE 139 #define RSA_F_RSA_SETUP_BLINDING 136 #define RSA_F_RSA_SIGN 117 @@ -567,6 +581,7 @@ void ERR_load_RSA_strings(void); #define RSA_R_DATA_TOO_LARGE_FOR_MODULUS 132 #define RSA_R_DATA_TOO_SMALL 111 #define RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE 122 +#define RSA_R_DIGEST_DOES_NOT_MATCH 158 #define RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY 112 #define RSA_R_DMP1_NOT_CONGRUENT_TO_D 124 #define RSA_R_DMQ1_NOT_CONGRUENT_TO_D 125 @@ -577,8 +592,10 @@ void ERR_load_RSA_strings(void); #define RSA_R_INVALID_DIGEST_LENGTH 143 #define RSA_R_INVALID_HEADER 137 #define RSA_R_INVALID_KEYBITS 145 +#define RSA_R_INVALID_LABEL 160 #define RSA_R_INVALID_MESSAGE_LENGTH 131 #define RSA_R_INVALID_MGF1_MD 156 +#define RSA_R_INVALID_OAEP_PARAMETERS 161 #define RSA_R_INVALID_PADDING 138 #define RSA_R_INVALID_PADDING_MODE 141 #define RSA_R_INVALID_PSS_PARAMETERS 149 @@ -604,9 +621,12 @@ void ERR_load_RSA_strings(void); #define RSA_R_SSLV3_ROLLBACK_ATTACK 115 #define RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD 116 #define RSA_R_UNKNOWN_ALGORITHM_TYPE 117 +#define RSA_R_UNKNOWN_DIGEST 159 #define RSA_R_UNKNOWN_MASK_DIGEST 151 #define RSA_R_UNKNOWN_PADDING_TYPE 118 #define RSA_R_UNKNOWN_PSS_DIGEST 152 +#define RSA_R_UNSUPPORTED_ENCRYPTION_TYPE 162 +#define RSA_R_UNSUPPORTED_LABEL_SOURCE 163 #define RSA_R_UNSUPPORTED_MASK_ALGORITHM 153 #define RSA_R_UNSUPPORTED_MASK_PARAMETER 154 #define RSA_R_UNSUPPORTED_SIGNATURE_TYPE 155 diff --git a/crypto/rsa/rsa_ameth.c b/crypto/rsa/rsa_ameth.c index 5a2062f903..bc6a578634 100644 --- a/crypto/rsa/rsa_ameth.c +++ b/crypto/rsa/rsa_ameth.c @@ -67,6 +67,11 @@ #endif #include "asn1_locl.h" +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); + static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) { unsigned char *penc = NULL; @@ -265,6 +270,23 @@ static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); } +/* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */ +static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) + { + const unsigned char *p; + int plen; + if (alg == NULL) + return NULL; + if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) + return NULL; + if (alg->parameter->type != V_ASN1_SEQUENCE) + return NULL; + + p = alg->parameter->value.sequence->data; + plen = alg->parameter->value.sequence->length; + return d2i_X509_ALGOR(NULL, &p, plen); + } + static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, X509_ALGOR **pmaskHash) { @@ -282,18 +304,8 @@ static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, if (!pss) return NULL; - - if (pss->maskGenAlgorithm) - { - ASN1_TYPE *param = pss->maskGenAlgorithm->parameter; - if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1 - && param->type == V_ASN1_SEQUENCE) - { - p = param->value.sequence->data; - plen = param->value.sequence->length; - *pmaskHash = d2i_X509_ALGOR(NULL, &p, plen); - } - } + + *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); return pss; } @@ -425,12 +437,16 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) #ifndef OPENSSL_NO_CMS case ASN1_PKEY_CTRL_CMS_SIGN: if (arg1 == 0) - CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg); + return rsa_cms_sign(arg2); + else if (arg1 == 1) + return rsa_cms_verify(arg2); break; case ASN1_PKEY_CTRL_CMS_ENVELOPE: if (arg1 == 0) - CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg); + return rsa_cms_encrypt(arg2); + else if (arg1 == 1) + return rsa_cms_decrypt(arg2); break; #endif @@ -451,26 +467,154 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) } -/* Customised RSA item verification routine. This is called - * when a signature is encountered requiring special handling. We - * currently only handle PSS. +/* allocate and set algorithm ID from EVP_MD, default SHA1 */ +static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) + { + if (EVP_MD_type(md) == NID_sha1) + return 1; + *palg = X509_ALGOR_new(); + if (!*palg) + 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 (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)) + goto err; + *palg = X509_ALGOR_new(); + if (!*palg) + goto err; + X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); + stmp = NULL; + err: + if (stmp) + ASN1_STRING_free(stmp); + if (algtmp) + 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 MGF1 algorithm ID to EVP_MD, default SHA1 */ +static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash) + { + const EVP_MD *md; + if (!alg) + return EVP_sha1(); + /* Check mask and lookup mask hash algorithm */ + if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) + { + RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM); + return NULL; + } + if (!maskHash) + { + RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER); + return NULL; + } + md = EVP_get_digestbyobj(maskHash->algorithm); + if (md == NULL) + { + RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST); + return NULL; + } + return md; + } + +/* Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter, + * suitable for setting an AlgorithmIdentifier. */ +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; + } + +/* From PSS AlgorithmIdentifier set public key parameters. If pkey + * isn't NULL then the EVP_MD_CTX is setup and initalised. If it + * is NULL parameters are passed to pkctx instead. + */ -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) +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; X509_ALGOR *maskHash; - EVP_PKEY_CTX *pkctx; /* Sanity check: make sure it is PSS */ if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); return -1; } /* Decode PSS parameters */ @@ -478,43 +622,15 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, if (pss == NULL) { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_PSS_PARAMETERS); + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); goto err; } - /* Check mask and lookup mask hash algorithm */ - if (pss->maskGenAlgorithm) - { - if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) != NID_mgf1) - { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_ALGORITHM); - goto err; - } - if (!maskHash) - { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_PARAMETER); - goto err; - } - mgf1md = EVP_get_digestbyobj(maskHash->algorithm); - if (mgf1md == NULL) - { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_MASK_DIGEST); - goto err; - } - } - else - mgf1md = EVP_sha1(); - - if (pss->hashAlgorithm) - { - md = EVP_get_digestbyobj(pss->hashAlgorithm->algorithm); - if (md == NULL) - { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_PSS_DIGEST); - goto err; - } - } - else - md = EVP_sha1(); + mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash); + if (!mgf1md) + goto err; + md = rsa_algor_to_md(pss->hashAlgorithm); + if (!md) + goto err; if (pss->saltLength) { @@ -525,7 +641,7 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, */ if (saltlen < 0) { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_SALT_LENGTH); + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH); goto err; } } @@ -537,14 +653,28 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, */ if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { - RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_TRAILER); + RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER); goto err; } /* We have all parameters now set up context */ - if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) - goto err; + 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; @@ -555,7 +685,7 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) goto err; /* Carry on */ - rv = 2; + rv = 1; err: RSA_PSS_PARAMS_free(pss); @@ -564,6 +694,70 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, return rv; } +static int rsa_cms_verify(CMS_SignerInfo *si) + { + int nid; + 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 == NID_rsaEncryption) + return 1; + if (nid == NID_rsassaPss) + return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); + return 0; + } + +/* 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) != NID_rsassaPss) + { + RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); + return -1; + } + if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey)) + /* Carry on */ + return 2; + return -1; + } + +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(pkctx); + if (!os) + return 0; + X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); + return 1; + } + 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) @@ -576,87 +770,198 @@ static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, 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; + ASN1_STRING *os1 = NULL; + os1 = rsa_ctx_to_pss(pkctx); + if (!os1) + return 0; + /* Duplicate parameters if we have to */ if (alg2) { - os2 = ASN1_STRING_dup(os1); + ASN1_STRING *os2 = ASN1_STRING_dup(os1); if (!os2) - goto err; + { + ASN1_STRING_free(os1); + return 0; + } 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 3; } return 2; } +static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg, + X509_ALGOR **pmaskHash) + { + const unsigned char *p; + int plen; + RSA_OAEP_PARAMS *pss; + + *pmaskHash = NULL; + + if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE) + return NULL; + p = alg->parameter->value.sequence->data; + plen = alg->parameter->value.sequence->length; + pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen); + + if (!pss) + return NULL; + + *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc); + + return pss; + } + +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; + X509_ALGOR *maskHash; + pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); + if (!pkctx) + 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, &maskHash); + + if (oaep == NULL) + { + RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); + goto err; + } + + mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash); + if (!mgf1md) + goto err; + md = rsa_algor_to_md(oaep->hashFunc); + if (!md) + goto err; + + if (oaep->pSourceFunc) + { + 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); + if (maskHash) + X509_ALGOR_free(maskHash); + 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; + 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) + 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 = ASN1_OCTET_STRING_new(); + oaep->pSourceFunc = X509_ALGOR_new(); + if (!oaep->pSourceFunc) + goto err; + if (!los) + 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: + if (oaep) + RSA_OAEP_PARAMS_free(oaep); + if (os) + ASN1_STRING_free(os); + return rv; + } + const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { { diff --git a/crypto/rsa/rsa_asn1.c b/crypto/rsa/rsa_asn1.c index 6ed5de3db4..dfb7292682 100644 --- a/crypto/rsa/rsa_asn1.c +++ b/crypto/rsa/rsa_asn1.c @@ -106,6 +106,14 @@ ASN1_SEQUENCE(RSA_PSS_PARAMS) = { IMPLEMENT_ASN1_FUNCTIONS(RSA_PSS_PARAMS) +ASN1_SEQUENCE(RSA_OAEP_PARAMS) = { + ASN1_EXP_OPT(RSA_OAEP_PARAMS, hashFunc, X509_ALGOR, 0), + ASN1_EXP_OPT(RSA_OAEP_PARAMS, maskGenFunc, X509_ALGOR, 1), + ASN1_EXP_OPT(RSA_OAEP_PARAMS, pSourceFunc, X509_ALGOR, 2), +} ASN1_SEQUENCE_END(RSA_OAEP_PARAMS) + +IMPLEMENT_ASN1_FUNCTIONS(RSA_OAEP_PARAMS) + IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(RSA, RSAPrivateKey, RSAPrivateKey) IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(RSA, RSAPublicKey, RSAPublicKey) diff --git a/crypto/rsa/rsa_err.c b/crypto/rsa/rsa_err.c index 45e3a6491f..93c3e1e0c5 100644 --- a/crypto/rsa/rsa_err.c +++ b/crypto/rsa/rsa_err.c @@ -82,8 +82,10 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_PKEY_RSA_CTRL_STR), "PKEY_RSA_CTRL_STR"}, {ERR_FUNC(RSA_F_PKEY_RSA_SIGN), "PKEY_RSA_SIGN"}, {ERR_FUNC(RSA_F_PKEY_RSA_VERIFYRECOVER), "PKEY_RSA_VERIFYRECOVER"}, +{ERR_FUNC(RSA_F_RSA_ALGOR_TO_MD), "RSA_ALGOR_TO_MD"}, {ERR_FUNC(RSA_F_RSA_BUILTIN_KEYGEN), "RSA_BUILTIN_KEYGEN"}, {ERR_FUNC(RSA_F_RSA_CHECK_KEY), "RSA_check_key"}, +{ERR_FUNC(RSA_F_RSA_CMS_DECRYPT), "RSA_CMS_DECRYPT"}, {ERR_FUNC(RSA_F_RSA_EAY_PRIVATE_DECRYPT), "RSA_EAY_PRIVATE_DECRYPT"}, {ERR_FUNC(RSA_F_RSA_EAY_PRIVATE_ENCRYPT), "RSA_EAY_PRIVATE_ENCRYPT"}, {ERR_FUNC(RSA_F_RSA_EAY_PUBLIC_DECRYPT), "RSA_EAY_PUBLIC_DECRYPT"}, @@ -91,6 +93,7 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_RSA_GENERATE_KEY), "RSA_generate_key"}, {ERR_FUNC(RSA_F_RSA_ITEM_VERIFY), "RSA_ITEM_VERIFY"}, {ERR_FUNC(RSA_F_RSA_MEMORY_LOCK), "RSA_memory_lock"}, +{ERR_FUNC(RSA_F_RSA_MGF1_TO_MD), "RSA_MGF1_TO_MD"}, {ERR_FUNC(RSA_F_RSA_NEW_METHOD), "RSA_new_method"}, {ERR_FUNC(RSA_F_RSA_NULL), "RSA_NULL"}, {ERR_FUNC(RSA_F_RSA_NULL_MOD_EXP), "RSA_NULL_MOD_EXP"}, @@ -98,6 +101,7 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_RSA_NULL_PRIVATE_ENCRYPT), "RSA_NULL_PRIVATE_ENCRYPT"}, {ERR_FUNC(RSA_F_RSA_NULL_PUBLIC_DECRYPT), "RSA_NULL_PUBLIC_DECRYPT"}, {ERR_FUNC(RSA_F_RSA_NULL_PUBLIC_ENCRYPT), "RSA_NULL_PUBLIC_ENCRYPT"}, +{ERR_FUNC(RSA_F_RSA_OAEP_TO_CTX), "RSA_OAEP_TO_CTX"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_NONE), "RSA_padding_add_none"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP), "RSA_padding_add_PKCS1_OAEP"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP_MGF1), "RSA_padding_add_PKCS1_OAEP_mgf1"}, @@ -118,6 +122,7 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_RSA_PRINT_FP), "RSA_print_fp"}, {ERR_FUNC(RSA_F_RSA_PRIV_DECODE), "RSA_PRIV_DECODE"}, {ERR_FUNC(RSA_F_RSA_PRIV_ENCODE), "RSA_PRIV_ENCODE"}, +{ERR_FUNC(RSA_F_RSA_PSS_TO_CTX), "RSA_PSS_TO_CTX"}, {ERR_FUNC(RSA_F_RSA_PUB_DECODE), "RSA_PUB_DECODE"}, {ERR_FUNC(RSA_F_RSA_SETUP_BLINDING), "RSA_setup_blinding"}, {ERR_FUNC(RSA_F_RSA_SIGN), "RSA_sign"}, @@ -143,6 +148,7 @@ static ERR_STRING_DATA RSA_str_reasons[]= {ERR_REASON(RSA_R_DATA_TOO_LARGE_FOR_MODULUS),"data too large for modulus"}, {ERR_REASON(RSA_R_DATA_TOO_SMALL) ,"data too small"}, {ERR_REASON(RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE),"data too small for key size"}, +{ERR_REASON(RSA_R_DIGEST_DOES_NOT_MATCH) ,"digest does not match"}, {ERR_REASON(RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY),"digest too big for rsa key"}, {ERR_REASON(RSA_R_DMP1_NOT_CONGRUENT_TO_D),"dmp1 not congruent to d"}, {ERR_REASON(RSA_R_DMQ1_NOT_CONGRUENT_TO_D),"dmq1 not congruent to d"}, @@ -153,8 +159,10 @@ static ERR_STRING_DATA RSA_str_reasons[]= {ERR_REASON(RSA_R_INVALID_DIGEST_LENGTH) ,"invalid digest length"}, {ERR_REASON(RSA_R_INVALID_HEADER) ,"invalid header"}, {ERR_REASON(RSA_R_INVALID_KEYBITS) ,"invalid keybits"}, +{ERR_REASON(RSA_R_INVALID_LABEL) ,"invalid label"}, {ERR_REASON(RSA_R_INVALID_MESSAGE_LENGTH),"invalid message length"}, {ERR_REASON(RSA_R_INVALID_MGF1_MD) ,"invalid mgf1 md"}, +{ERR_REASON(RSA_R_INVALID_OAEP_PARAMETERS),"invalid oaep parameters"}, {ERR_REASON(RSA_R_INVALID_PADDING) ,"invalid padding"}, {ERR_REASON(RSA_R_INVALID_PADDING_MODE) ,"invalid padding mode"}, {ERR_REASON(RSA_R_INVALID_PSS_PARAMETERS),"invalid pss parameters"}, @@ -180,9 +188,12 @@ static ERR_STRING_DATA RSA_str_reasons[]= {ERR_REASON(RSA_R_SSLV3_ROLLBACK_ATTACK) ,"sslv3 rollback attack"}, {ERR_REASON(RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD),"the asn1 object identifier is not known for this md"}, {ERR_REASON(RSA_R_UNKNOWN_ALGORITHM_TYPE),"unknown algorithm type"}, +{ERR_REASON(RSA_R_UNKNOWN_DIGEST) ,"unknown digest"}, {ERR_REASON(RSA_R_UNKNOWN_MASK_DIGEST) ,"unknown mask digest"}, {ERR_REASON(RSA_R_UNKNOWN_PADDING_TYPE) ,"unknown padding type"}, {ERR_REASON(RSA_R_UNKNOWN_PSS_DIGEST) ,"unknown pss digest"}, +{ERR_REASON(RSA_R_UNSUPPORTED_ENCRYPTION_TYPE),"unsupported encryption type"}, +{ERR_REASON(RSA_R_UNSUPPORTED_LABEL_SOURCE),"unsupported label source"}, {ERR_REASON(RSA_R_UNSUPPORTED_MASK_ALGORITHM),"unsupported mask algorithm"}, {ERR_REASON(RSA_R_UNSUPPORTED_MASK_PARAMETER),"unsupported mask parameter"}, {ERR_REASON(RSA_R_UNSUPPORTED_SIGNATURE_TYPE),"unsupported signature type"}, diff --git a/crypto/rsa/rsa_pmeth.c b/crypto/rsa/rsa_pmeth.c index ed1eb4922c..96d1d05735 100644 --- a/crypto/rsa/rsa_pmeth.c +++ b/crypto/rsa/rsa_pmeth.c @@ -597,16 +597,6 @@ static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) return 1; #ifndef OPENSSL_NO_CMS case EVP_PKEY_CTRL_CMS_DECRYPT: - { - X509_ALGOR *alg = NULL; - ASN1_OBJECT *encalg = NULL; - if (p2) - CMS_RecipientInfo_ktri_get0_algs(p2, NULL, NULL, &alg); - if (alg) - X509_ALGOR_get0(&encalg, NULL, NULL, alg); - if (encalg && OBJ_obj2nid(encalg) == NID_rsaesOaep) - rctx->pad_mode = RSA_PKCS1_OAEP_PADDING; - } case EVP_PKEY_CTRL_CMS_ENCRYPT: case EVP_PKEY_CTRL_CMS_SIGN: return 1;