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SUSE:SLE-12-SP2:GA
compat-openssl098.20929
openssl-Extended-OAEP-support.patch
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File openssl-Extended-OAEP-support.patch of Package compat-openssl098.20929
From 271fef0ef39a1c0cb5233a5adf3ff8733abb375e Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" <steve@openssl.org> Date: Tue, 21 May 2013 23:55:50 +0100 Subject: [PATCH] Exetended OAEP support. Extend OAEP support. Generalise the OAEP padding functions to support arbitrary digests. Extend EVP_PKEY RSA method to handle the new OAEP padding functions and add ctrls to set the additional parameters. --- CHANGES | 4 ++ crypto/rsa/rsa.h | 28 +++++++++- crypto/rsa/rsa_err.c | 7 ++- crypto/rsa/rsa_oaep.c | 105 ++++++++++++++++++++++------------- crypto/rsa/rsa_pmeth.c | 121 +++++++++++++++++++++++++++++++++++++++-- 5 files changed, 217 insertions(+), 48 deletions(-) Index: openssl-0.9.8j/crypto/rsa/rsa.h =================================================================== --- openssl-0.9.8j.orig/crypto/rsa/rsa.h +++ openssl-0.9.8j/crypto/rsa/rsa.h @@ -237,6 +237,26 @@ struct rsa_st */ #endif +#define EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md) \ + 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) + +#define EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md) \ + EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \ + EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)md) + +#define EVP_PKEY_CTX_get_rsa_mgf1_md(ctx, pmd) \ + EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, \ + EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \ + EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)pmd) + +#define EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, l, llen) \ + EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \ + EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen, (void *)l) + +#define EVP_PKEY_CTRL_RSA_OAEP_MD (EVP_PKEY_ALG_CTRL + 9) +#define EVP_PKEY_CTRL_RSA_OAEP_LABEL (EVP_PKEY_ALG_CTRL + 10) #define RSA_PKCS1_PADDING 1 #define RSA_SSLV23_PADDING 2 @@ -364,6 +384,14 @@ int RSA_padding_add_PKCS1_OAEP(unsigned int RSA_padding_check_PKCS1_OAEP(unsigned char *to,int tlen, const unsigned char *f,int fl,int rsa_len, const unsigned char *p,int pl); +int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, + const unsigned char *from, int flen, + const unsigned char *param, int plen, + const EVP_MD *md, const EVP_MD *mgf1md); +int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, + const unsigned char *from, int flen, int num, + const unsigned char *param, int plen, + const EVP_MD *md, const EVP_MD *mgf1md); int RSA_padding_add_SSLv23(unsigned char *to,int tlen, const unsigned char *f,int fl); int RSA_padding_check_SSLv23(unsigned char *to,int tlen, @@ -421,6 +449,7 @@ void ERR_load_RSA_strings(void); #define RSA_F_RSA_NULL_PUBLIC_ENCRYPT 135 #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 #define RSA_F_RSA_PADDING_ADD_PKCS1_PSS 125 #define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1 108 #define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2 109 @@ -428,6 +457,7 @@ void ERR_load_RSA_strings(void); #define RSA_F_RSA_PADDING_ADD_X931 127 #define RSA_F_RSA_PADDING_CHECK_NONE 111 #define RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP 122 +#define RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP_MGF1 153 #define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1 112 #define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2 113 #define RSA_F_RSA_PADDING_CHECK_SSLV23 114 @@ -464,6 +494,7 @@ void ERR_load_RSA_strings(void); #define RSA_R_DMQ1_NOT_CONGRUENT_TO_D 125 #define RSA_R_D_E_NOT_CONGRUENT_TO_1 123 #define RSA_R_FIRST_OCTET_INVALID 133 +#define RSA_R_INVALID_DIGEST 157 #define RSA_R_INVALID_HEADER 137 #define RSA_R_INVALID_MESSAGE_LENGTH 131 #define RSA_R_INVALID_PADDING 138 Index: openssl-0.9.8j/crypto/rsa/rsa_err.c =================================================================== --- openssl-0.9.8j.orig/crypto/rsa/rsa_err.c +++ openssl-0.9.8j/crypto/rsa/rsa_err.c @@ -90,6 +90,7 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_RSA_NULL_PUBLIC_ENCRYPT), "RSA_NULL_PUBLIC_ENCRYPT"}, {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"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_PKCS1_PSS), "RSA_padding_add_PKCS1_PSS"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1), "RSA_padding_add_PKCS1_type_1"}, {ERR_FUNC(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2), "RSA_padding_add_PKCS1_type_2"}, @@ -97,6 +98,7 @@ static ERR_STRING_DATA RSA_str_functs[]= {ERR_FUNC(RSA_F_RSA_PADDING_ADD_X931), "RSA_padding_add_X931"}, {ERR_FUNC(RSA_F_RSA_PADDING_CHECK_NONE), "RSA_padding_check_none"}, {ERR_FUNC(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP), "RSA_padding_check_PKCS1_OAEP"}, +{ERR_FUNC(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP_MGF1), "RSA_padding_check_PKCS1_OAEP_mgf1"}, {ERR_FUNC(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1), "RSA_padding_check_PKCS1_type_1"}, {ERR_FUNC(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2), "RSA_padding_check_PKCS1_type_2"}, {ERR_FUNC(RSA_F_RSA_PADDING_CHECK_SSLV23), "RSA_padding_check_SSLv23"}, @@ -136,6 +138,7 @@ static ERR_STRING_DATA RSA_str_reasons[] {ERR_REASON(RSA_R_DMQ1_NOT_CONGRUENT_TO_D),"dmq1 not congruent to d"}, {ERR_REASON(RSA_R_D_E_NOT_CONGRUENT_TO_1),"d e not congruent to 1"}, {ERR_REASON(RSA_R_FIRST_OCTET_INVALID) ,"first octet invalid"}, +{ERR_REASON(RSA_R_INVALID_DIGEST) ,"invalid digest"}, {ERR_REASON(RSA_R_INVALID_HEADER) ,"invalid header"}, {ERR_REASON(RSA_R_INVALID_MESSAGE_LENGTH),"invalid message length"}, {ERR_REASON(RSA_R_INVALID_PADDING) ,"invalid padding"}, Index: openssl-0.9.8j/crypto/rsa/rsa_oaep.c =================================================================== --- openssl-0.9.8j.orig/crypto/rsa/rsa_oaep.c +++ openssl-0.9.8j/crypto/rsa/rsa_oaep.c @@ -28,47 +28,62 @@ #include <openssl/rand.h> #include <openssl/sha.h> -int MGF1(unsigned char *mask, long len, - const unsigned char *seed, long seedlen); - int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen, const unsigned char *from, int flen, const unsigned char *param, int plen) { + return RSA_padding_add_PKCS1_OAEP_mgf1(to, tlen, from, flen, + param, plen, NULL, NULL); + } + +int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, + const unsigned char *from, int flen, + const unsigned char *param, int plen, + const EVP_MD *md, const EVP_MD *mgf1md) +{ int i, emlen = tlen - 1; unsigned char *db, *seed; - unsigned char *dbmask, seedmask[SHA_DIGEST_LENGTH]; + unsigned char *dbmask, seedmask[EVP_MAX_MD_SIZE]; + int mdlen; + + if (md == NULL) + md = EVP_sha1(); + if (mgf1md == NULL) + mgf1md = md; + + mdlen = EVP_MD_size(md); - if (flen > emlen - 2 * SHA_DIGEST_LENGTH - 1) + if (flen > emlen - 2 * mdlen - 1) { - RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP, + RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP_MGF1, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); return 0; } if (emlen < 2 * SHA_DIGEST_LENGTH + 1) { - RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP, RSA_R_KEY_SIZE_TOO_SMALL); + RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP_MGF1, RSA_R_KEY_SIZE_TOO_SMALL); return 0; } - dbmask = OPENSSL_malloc(emlen - SHA_DIGEST_LENGTH); + dbmask = OPENSSL_malloc(emlen - mdlen); if (dbmask == NULL) { - RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP, ERR_R_MALLOC_FAILURE); + RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_OAEP_MGF1, ERR_R_MALLOC_FAILURE); return 0; } to[0] = 0; seed = to + 1; - db = to + SHA_DIGEST_LENGTH + 1; + db = to + mdlen + 1; - EVP_Digest((void *)param, plen, db, NULL, EVP_sha1(), NULL); - memset(db + SHA_DIGEST_LENGTH, 0, - emlen - flen - 2 * SHA_DIGEST_LENGTH - 1); - db[emlen - flen - SHA_DIGEST_LENGTH - 1] = 0x01; - memcpy(db + emlen - flen - SHA_DIGEST_LENGTH, from, (unsigned int) flen); - if (RAND_bytes(seed, SHA_DIGEST_LENGTH) <= 0) + if (!EVP_Digest((void *)param, plen, db, NULL, md, NULL)) + return 0; + memset(db + mdlen, 0, + emlen - flen - 2 * mdlen - 1); + db[emlen - flen - mdlen - 1] = 0x01; + memcpy(db + emlen - flen - mdlen, from, (unsigned int) flen); + if (RAND_bytes(seed, mdlen) <= 0) return 0; #ifdef PKCS_TESTVECT memcpy(seed, @@ -76,12 +91,15 @@ int RSA_padding_add_PKCS1_OAEP(unsigned 20); #endif - MGF1(dbmask, emlen - SHA_DIGEST_LENGTH, seed, SHA_DIGEST_LENGTH); - for (i = 0; i < emlen - SHA_DIGEST_LENGTH; i++) + if (PKCS1_MGF1(dbmask, emlen - mdlen, seed, mdlen, mgf1md) < 0) + return 0; + for (i = 0; i < emlen - mdlen; i++) db[i] ^= dbmask[i]; - MGF1(seedmask, SHA_DIGEST_LENGTH, db, emlen - SHA_DIGEST_LENGTH); - for (i = 0; i < SHA_DIGEST_LENGTH; i++) + if (PKCS1_MGF1(seedmask, mdlen, db, emlen - mdlen, mgf1md) < 0) + return 0; + + for (i = 0; i < mdlen; i++) seed[i] ^= seedmask[i]; OPENSSL_free(dbmask); @@ -92,14 +110,32 @@ int RSA_padding_check_PKCS1_OAEP(unsigne const unsigned char *from, int flen, int num, const unsigned char *param, int plen) { + return RSA_padding_check_PKCS1_OAEP_mgf1(to, tlen, from , flen, num, + param, plen, + NULL, NULL); + } + +int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen, + const unsigned char *from, int flen, int num, + const unsigned char *param, int plen, + const EVP_MD *md, const EVP_MD *mgf1md) + { int i, dblen, mlen = -1; const unsigned char *maskeddb; int lzero; - unsigned char *db = NULL, seed[SHA_DIGEST_LENGTH], phash[SHA_DIGEST_LENGTH]; + unsigned char *db = NULL, seed[EVP_MAX_MD_SIZE], phash[EVP_MAX_MD_SIZE]; unsigned char *padded_from; int bad = 0; + int mdlen; + + if (md == NULL) + md = EVP_sha1(); + if (mgf1md == NULL) + mgf1md = md; + + mdlen = EVP_MD_size(md); - if (--num < 2 * SHA_DIGEST_LENGTH + 1) + if (--num < 2 * mdlen + 1) /* 'num' is the length of the modulus, i.e. does not depend on the * particular ciphertext. */ goto decoding_err; @@ -117,11 +153,11 @@ int RSA_padding_check_PKCS1_OAEP(unsigne flen = num; /* don't overflow the memcpy to padded_from */ } - dblen = num - SHA_DIGEST_LENGTH; + dblen = num - mdlen; db = OPENSSL_malloc(dblen + num); if (db == NULL) { - RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, ERR_R_MALLOC_FAILURE); + RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP_MGF1, ERR_R_MALLOC_FAILURE); return -1; } @@ -131,23 +167,26 @@ int RSA_padding_check_PKCS1_OAEP(unsigne memset(padded_from, 0, lzero); memcpy(padded_from + lzero, from, flen); - maskeddb = padded_from + SHA_DIGEST_LENGTH; + maskeddb = padded_from + mdlen; - MGF1(seed, SHA_DIGEST_LENGTH, maskeddb, dblen); - for (i = 0; i < SHA_DIGEST_LENGTH; i++) + if (PKCS1_MGF1(seed, mdlen, maskeddb, dblen, mgf1md)) + return -1; + for (i = 0; i < mdlen; i++) seed[i] ^= padded_from[i]; - MGF1(db, dblen, seed, SHA_DIGEST_LENGTH); + if (PKCS1_MGF1(db, dblen, seed, mdlen, mgf1md)) + return -1; for (i = 0; i < dblen; i++) db[i] ^= maskeddb[i]; - EVP_Digest((void *)param, plen, phash, NULL, EVP_sha1(), NULL); + if (!EVP_Digest((void *)param, plen, phash, NULL, md, NULL)) + return -1; - if (CRYPTO_memcmp(db, phash, SHA_DIGEST_LENGTH) != 0 || bad) + if (CRYPTO_memcmp(db, phash, mdlen) != 0 || bad) goto decoding_err; else { - for (i = SHA_DIGEST_LENGTH; i < dblen; i++) + for (i = mdlen; i < dblen; i++) if (db[i] != 0x00) break; if (i == dblen || db[i] != 0x01) @@ -159,7 +198,7 @@ int RSA_padding_check_PKCS1_OAEP(unsigne mlen = dblen - ++i; if (tlen < mlen) { - RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, RSA_R_DATA_TOO_LARGE); + RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP_MGF1, RSA_R_DATA_TOO_LARGE); mlen = -1; } else @@ -172,7 +211,7 @@ int RSA_padding_check_PKCS1_OAEP(unsigne decoding_err: /* to avoid chosen ciphertext attacks, the error message should not reveal * which kind of decoding error happened */ - RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP, RSA_R_OAEP_DECODING_ERROR); + RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP_MGF1, RSA_R_OAEP_DECODING_ERROR); if (db != NULL) OPENSSL_free(db); return -1; } @@ -213,8 +252,4 @@ int PKCS1_MGF1(unsigned char *mask, long return 0; } -int MGF1(unsigned char *mask, long len, const unsigned char *seed, long seedlen) - { - return PKCS1_MGF1(mask, len, seed, seedlen, EVP_sha1()); - } #endif
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