diff options
author | Dr. Stephen Henson <steve@openssl.org> | 1999-09-18 22:37:44 +0000 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 1999-09-18 22:37:44 +0000 |
commit | 1c80019a2c8f59410552197723829fd72ab45a5e (patch) | |
tree | e78f00fb8637de56d6dc390c9d5a239b494ab830 /crypto/rsa | |
parent | 090d848ea89b112587cf2e5b26acfaaae6bf79c2 (diff) | |
download | openssl-1c80019a2c8f59410552197723829fd72ab45a5e.zip openssl-1c80019a2c8f59410552197723829fd72ab45a5e.tar.gz openssl-1c80019a2c8f59410552197723829fd72ab45a5e.tar.bz2 |
Add new sign and verify members to RSA_METHOD and change SSL code to use sign
and verify rather than direct encrypt/decrypt.
Diffstat (limited to 'crypto/rsa')
-rw-r--r-- | crypto/rsa/rsa.h | 17 | ||||
-rw-r--r-- | crypto/rsa/rsa_err.c | 1 | ||||
-rw-r--r-- | crypto/rsa/rsa_sign.c | 153 |
3 files changed, 111 insertions, 60 deletions
diff --git a/crypto/rsa/rsa.h b/crypto/rsa/rsa.h index 6c64db7..7fe1d23 100644 --- a/crypto/rsa/rsa.h +++ b/crypto/rsa/rsa.h @@ -91,6 +91,18 @@ typedef struct rsa_meth_st int (*finish)(RSA *rsa); /* called at free */ int flags; /* RSA_METHOD_FLAG_* things */ char *app_data; /* may be needed! */ +/* New sign and verify functions: some libraries don't allow arbitrary data + * to be signed/verified: this allows them to be used. Note: for this to work + * the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used + * RSA_sign(), RSA_verify() should be used instead. Note: for backwards + * compatability this functionality is only enabled if the RSA_FLAG_SIGN_VER + * option is set in 'flags'. + */ + int (*rsa_sign)(int type, unsigned char *m, unsigned int m_len, + unsigned char *sigret, unsigned int *siglen, RSA *rsa); + int (*rsa_verify)(int dtype, unsigned char *m, unsigned int m_len, + unsigned char *sigbuf, unsigned int siglen, RSA *rsa); + } RSA_METHOD; struct rsa_st @@ -140,6 +152,10 @@ struct rsa_st */ #define RSA_FLAG_EXT_PKEY 0x20 +/* This flag in the RSA_METHOD enables the new rsa_sign, rsa_verify functions. + */ +#define RSA_FLAG_SIGN_VER 0x40 + #define RSA_PKCS1_PADDING 1 #define RSA_SSLV23_PADDING 2 #define RSA_NO_PADDING 3 @@ -299,6 +315,7 @@ char *RSA_get_ex_data(RSA *r, int idx); #define RSA_R_DMP1_NOT_CONGRUENT_TO_D 124 #define RSA_R_DMQ1_NOT_CONGRUENT_TO_D 125 #define RSA_R_D_E_NOT_CONGRUENT_TO_1 123 +#define RSA_R_INVALID_MESSAGE_LENGTH 131 #define RSA_R_IQMP_NOT_INVERSE_OF_Q 126 #define RSA_R_KEY_SIZE_TOO_SMALL 120 #define RSA_R_NULL_BEFORE_BLOCK_MISSING 113 diff --git a/crypto/rsa/rsa_err.c b/crypto/rsa/rsa_err.c index 7762bd5..5cfbea2 100644 --- a/crypto/rsa/rsa_err.c +++ b/crypto/rsa/rsa_err.c @@ -111,6 +111,7 @@ static ERR_STRING_DATA RSA_str_reasons[]= {RSA_R_DMP1_NOT_CONGRUENT_TO_D ,"dmp1 not congruent to d"}, {RSA_R_DMQ1_NOT_CONGRUENT_TO_D ,"dmq1 not congruent to d"}, {RSA_R_D_E_NOT_CONGRUENT_TO_1 ,"d e not congruent to 1"}, +{RSA_R_INVALID_MESSAGE_LENGTH ,"invalid message length"}, {RSA_R_IQMP_NOT_INVERSE_OF_Q ,"iqmp not inverse of q"}, {RSA_R_KEY_SIZE_TOO_SMALL ,"key size too small"}, {RSA_R_NULL_BEFORE_BLOCK_MISSING ,"null before block missing"}, diff --git a/crypto/rsa/rsa_sign.c b/crypto/rsa/rsa_sign.c index 1740494..15c6d1a 100644 --- a/crypto/rsa/rsa_sign.c +++ b/crypto/rsa/rsa_sign.c @@ -63,59 +63,77 @@ #include <openssl/objects.h> #include <openssl/x509.h> +/* Size of an SSL signature: MD5+SHA1 */ +#define SSL_SIG_LENGTH 36 + int RSA_sign(int type, unsigned char *m, unsigned int m_len, unsigned char *sigret, unsigned int *siglen, RSA *rsa) { X509_SIG sig; ASN1_TYPE parameter; int i,j,ret=1; - unsigned char *p,*s; + unsigned char *p,*s = NULL; X509_ALGOR algor; ASN1_OCTET_STRING digest; - - sig.algor= &algor; - sig.algor->algorithm=OBJ_nid2obj(type); - if (sig.algor->algorithm == NULL) - { - RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE); - return(0); - } - if (sig.algor->algorithm->length == 0) - { - RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); - return(0); + if(rsa->flags & RSA_FLAG_SIGN_VER) + return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa); + /* Special case: SSL signature, just check the length */ + if(type == NID_md5_sha1) { + if(m_len != SSL_SIG_LENGTH) { + RSAerr(RSA_F_RSA_SIGN,RSA_R_INVALID_MESSAGE_LENGTH); + return(0); } - parameter.type=V_ASN1_NULL; - parameter.value.ptr=NULL; - sig.algor->parameter= ¶meter; + i = SSL_SIG_LENGTH; + s = m; + } else { + sig.algor= &algor; + sig.algor->algorithm=OBJ_nid2obj(type); + if (sig.algor->algorithm == NULL) + { + RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE); + return(0); + } + if (sig.algor->algorithm->length == 0) + { + RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); + return(0); + } + parameter.type=V_ASN1_NULL; + parameter.value.ptr=NULL; + sig.algor->parameter= ¶meter; - sig.digest= &digest; - sig.digest->data=m; - sig.digest->length=m_len; + sig.digest= &digest; + sig.digest->data=m; + sig.digest->length=m_len; - i=i2d_X509_SIG(&sig,NULL); + i=i2d_X509_SIG(&sig,NULL); + } j=RSA_size(rsa); if ((i-RSA_PKCS1_PADDING) > j) { RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); return(0); } - s=(unsigned char *)Malloc((unsigned int)j+1); - if (s == NULL) - { - RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE); - return(0); - } - p=s; - i2d_X509_SIG(&sig,&p); + if(type != NID_md5_sha1) { + s=(unsigned char *)Malloc((unsigned int)j+1); + if (s == NULL) + { + RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE); + return(0); + } + p=s; + i2d_X509_SIG(&sig,&p); + } i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING); if (i <= 0) ret=0; else *siglen=i; - memset(s,0,(unsigned int)j+1); - Free(s); + if(type != NID_md5_sha1) { + memset(s,0,(unsigned int)j+1); + Free(s); + } return(ret); } @@ -132,53 +150,68 @@ int RSA_verify(int dtype, unsigned char *m, unsigned int m_len, return(0); } + if(rsa->flags & RSA_FLAG_SIGN_VER) + return rsa->meth->rsa_verify(dtype, m, m_len, sigbuf, siglen, rsa); + s=(unsigned char *)Malloc((unsigned int)siglen); if (s == NULL) { RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE); goto err; } + if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) { + RSAerr(RSA_F_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH); + return(0); + } i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING); if (i <= 0) goto err; - p=s; - sig=d2i_X509_SIG(NULL,&p,(long)i); + /* Special case: SSL signature */ + if(dtype == NID_md5_sha1) { + if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH)) + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE); + else ret = 1; + } else { + p=s; + sig=d2i_X509_SIG(NULL,&p,(long)i); - if (sig == NULL) goto err; - sigtype=OBJ_obj2nid(sig->algor->algorithm); + if (sig == NULL) goto err; + sigtype=OBJ_obj2nid(sig->algor->algorithm); -#ifdef RSA_DEBUG - /* put a backward compatability flag in EAY */ - fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype), - OBJ_nid2ln(dtype)); -#endif - if (sigtype != dtype) - { - if (((dtype == NID_md5) && - (sigtype == NID_md5WithRSAEncryption)) || - ((dtype == NID_md2) && - (sigtype == NID_md2WithRSAEncryption))) + #ifdef RSA_DEBUG + /* put a backward compatability flag in EAY */ + fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype), + OBJ_nid2ln(dtype)); + #endif + if (sigtype != dtype) { - /* ok, we will let it through */ -#if !defined(NO_STDIO) && !defined(WIN16) - fprintf(stderr,"signature has problems, re-make with post SSLeay045\n"); -#endif + if (((dtype == NID_md5) && + (sigtype == NID_md5WithRSAEncryption)) || + ((dtype == NID_md2) && + (sigtype == NID_md2WithRSAEncryption))) + { + /* ok, we will let it through */ + #if !defined(NO_STDIO) && !defined(WIN16) + fprintf(stderr,"signature has problems, re-make with post SSLeay045\n"); + #endif + } + else + { + RSAerr(RSA_F_RSA_VERIFY, + RSA_R_ALGORITHM_MISMATCH); + goto err; + } } - else + if ( ((unsigned int)sig->digest->length != m_len) || + (memcmp(m,sig->digest->data,m_len) != 0)) { - RSAerr(RSA_F_RSA_VERIFY,RSA_R_ALGORITHM_MISMATCH); - goto err; + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE); } - } - if ( ((unsigned int)sig->digest->length != m_len) || - (memcmp(m,sig->digest->data,m_len) != 0)) - { - RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE); - } - else - ret=1; + else + ret=1; + } err: if (sig != NULL) X509_SIG_free(sig); memset(s,0,(unsigned int)siglen); |