X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fpem%2Fpem_lib.c;h=9e551d1795f913e1afe65bcce4b50af809d27c9f;hp=24464308cd22cfe444023f810cb073c30b96b317;hb=2ca873e8d898e8a232ea707227400213980059a4;hpb=a74c55cd8f73b4ff4480a1ab425ac2d6d8df5039 diff --git a/crypto/pem/pem_lib.c b/crypto/pem/pem_lib.c index 24464308cd..9e551d1795 100644 --- a/crypto/pem/pem_lib.c +++ b/crypto/pem/pem_lib.c @@ -57,6 +57,7 @@ */ #include +#include #include "cryptlib.h" #include #include @@ -64,26 +65,39 @@ #include #include #include -#ifndef NO_DES +#include +#include "asn1_locl.h" +#ifndef OPENSSL_NO_DES #include #endif +#ifndef OPENSSL_NO_ENGINE +#include +#endif -const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT; +const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT; #define MIN_LENGTH 4 -static int def_callback(char *buf, int num, int w); -static int load_iv(unsigned char **fromp,unsigned char *to, int num); -static int def_callback(char *buf, int num, int w) +static int load_iv(char **fromp,unsigned char *to, int num); +static int check_pem(const char *nm, const char *name); +int pem_check_suffix(const char *pem_str, const char *suffix); + +int PEM_def_callback(char *buf, int num, int w, void *key) { -#ifdef NO_FP_API +#ifdef OPENSSL_NO_FP_API /* We should not ever call the default callback routine from * windows. */ - PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); return(-1); #else int i,j; const char *prompt; + if(key) { + i=strlen(key); + i=(i > num)?num:i; + memcpy(buf,key,i); + return(i); + } prompt=EVP_get_pw_prompt(); if (prompt == NULL) @@ -91,10 +105,10 @@ static int def_callback(char *buf, int num, int w) for (;;) { - i=EVP_read_pw_string(buf,num,prompt,w); + i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w); if (i != 0) { - PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD); + PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD); memset(buf,0,(unsigned int)num); return(-1); } @@ -123,21 +137,23 @@ void PEM_proc_type(char *buf, int type) else str="BAD-TYPE"; - strcat(buf,"Proc-Type: 4,"); - strcat(buf,str); - strcat(buf,"\n"); + BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE); + BUF_strlcat(buf,str,PEM_BUFSIZE); + BUF_strlcat(buf,"\n",PEM_BUFSIZE); } void PEM_dek_info(char *buf, const char *type, int len, char *str) { - static unsigned char map[17]="0123456789ABCDEF"; + static const unsigned char map[17]="0123456789ABCDEF"; long i; int j; - strcat(buf,"DEK-Info: "); - strcat(buf,type); - strcat(buf,","); + BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE); + BUF_strlcat(buf,type,PEM_BUFSIZE); + BUF_strlcat(buf,",",PEM_BUFSIZE); j=strlen(buf); + if (j + (len * 2) + 1 > PEM_BUFSIZE) + return; for (i=0; i>4)&0x0f]; @@ -147,12 +163,12 @@ void PEM_dek_info(char *buf, const char *type, int len, char *str) buf[j+i*2+1]='\0'; } -#ifndef NO_FP_API -char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x, - pem_password_cb *cb) +#ifndef OPENSSL_NO_FP_API +void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, + pem_password_cb *cb, void *u) { BIO *b; - char *ret; + void *ret; if ((b=BIO_new(BIO_s_file())) == NULL) { @@ -160,64 +176,147 @@ char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x, return(0); } BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_ASN1_read_bio(d2i,name,b,x,cb); + ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u); BIO_free(b); return(ret); } #endif -char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x, - pem_password_cb *cb) +static int check_pem(const char *nm, const char *name) +{ + /* Normal matching nm and name */ + if (!strcmp(nm,name)) return 1; + + /* Make PEM_STRING_EVP_PKEY match any private key */ + + if(!strcmp(name,PEM_STRING_EVP_PKEY)) + { + int slen; + const EVP_PKEY_ASN1_METHOD *ameth; + if(!strcmp(nm,PEM_STRING_PKCS8)) + return 1; + if(!strcmp(nm,PEM_STRING_PKCS8INF)) + return 1; + slen = pem_check_suffix(nm, "PRIVATE KEY"); + if (slen > 0) + { + /* NB: ENGINE implementations wont contain + * a deprecated old private key decode function + * so don't look for them. + */ + ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); + if (ameth && ameth->old_priv_decode) + return 1; + } + return 0; + } + + if(!strcmp(name,PEM_STRING_PARAMETERS)) + { + int slen; + const EVP_PKEY_ASN1_METHOD *ameth; + slen = pem_check_suffix(nm, "PARAMETERS"); + if (slen > 0) + { + ENGINE *e; + ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); + if (ameth) + { + int r; + if (ameth->param_decode) + r = 1; + else + r = 0; +#ifndef OPENSSL_NO_ENGINE + if (e) + ENGINE_finish(e); +#endif + return r; + } + } + return 0; + } + /* If reading DH parameters handle X9.42 DH format too */ + if(!strcmp(nm,PEM_STRING_DHXPARAMS) && + !strcmp(name,PEM_STRING_DHPARAMS)) return 1; + + /* Permit older strings */ + + if(!strcmp(nm,PEM_STRING_X509_OLD) && + !strcmp(name,PEM_STRING_X509)) return 1; + + if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) && + !strcmp(name,PEM_STRING_X509_REQ)) return 1; + + /* Allow normal certs to be read as trusted certs */ + if(!strcmp(nm,PEM_STRING_X509) && + !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; + + if(!strcmp(nm,PEM_STRING_X509_OLD) && + !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; + + /* Some CAs use PKCS#7 with CERTIFICATE headers */ + if(!strcmp(nm, PEM_STRING_X509) && + !strcmp(name, PEM_STRING_PKCS7)) return 1; + + if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && + !strcmp(name, PEM_STRING_PKCS7)) return 1; + +#ifndef OPENSSL_NO_CMS + if(!strcmp(nm, PEM_STRING_X509) && + !strcmp(name, PEM_STRING_CMS)) return 1; + /* Allow CMS to be read from PKCS#7 headers */ + if(!strcmp(nm, PEM_STRING_PKCS7) && + !strcmp(name, PEM_STRING_CMS)) return 1; +#endif + + return 0; +} + +int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp, + pem_password_cb *cb, void *u) { EVP_CIPHER_INFO cipher; char *nm=NULL,*header=NULL; - unsigned char *p=NULL,*data=NULL; + unsigned char *data=NULL; long len; - char *ret=NULL; + int ret = 0; for (;;) { - if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL); - if ( (strcmp(nm,name) == 0) || - ((strcmp(nm,PEM_STRING_RSA) == 0) && - (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) || - ((strcmp(nm,PEM_STRING_DSA) == 0) && - (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) || - ((strcmp(nm,PEM_STRING_X509_OLD) == 0) && - (strcmp(name,PEM_STRING_X509) == 0)) || - ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) && - (strcmp(name,PEM_STRING_X509_REQ) == 0)) - ) - break; - Free(nm); - Free(header); - Free(data); + if (!PEM_read_bio(bp,&nm,&header,&data,&len)) { + if(ERR_GET_REASON(ERR_peek_error()) == + PEM_R_NO_START_LINE) + ERR_add_error_data(2, "Expecting: ", name); + return 0; + } + if(check_pem(nm, name)) break; + OPENSSL_free(nm); + OPENSSL_free(header); + OPENSSL_free(data); } if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err; - if (!PEM_do_header(&cipher,data,&len,cb)) goto err; - p=data; - if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) - { - if (strcmp(nm,PEM_STRING_RSA) == 0) - ret=d2i(EVP_PKEY_RSA,x,&p,len); - else if (strcmp(nm,PEM_STRING_DSA) == 0) - ret=d2i(EVP_PKEY_DSA,x,&p,len); - } - else - ret=d2i(x,&p,len); - if (ret == NULL) - PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB); + if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err; + + *pdata = data; + *plen = len; + + if (pnm) + *pnm = nm; + + ret = 1; + err: - Free(nm); - Free(header); - Free(data); - return(ret); + if (!ret || !pnm) OPENSSL_free(nm); + OPENSSL_free(header); + if (!ret) OPENSSL_free(data); + return ret; } -#ifndef NO_FP_API -int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x, - const EVP_CIPHER *enc, unsigned char *kstr, int klen, - pem_password_cb *callback) +#ifndef OPENSSL_NO_FP_API +int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, + void *x, const EVP_CIPHER *enc, unsigned char *kstr, + int klen, pem_password_cb *callback, void *u) { BIO *b; int ret; @@ -228,21 +327,20 @@ int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x, return(0); } BIO_set_fp(b,fp,BIO_NOCLOSE); - ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback); + ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u); BIO_free(b); return(ret); } #endif -int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x, - const EVP_CIPHER *enc, unsigned char *kstr, int klen, - pem_password_cb *callback) +int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, + void *x, const EVP_CIPHER *enc, unsigned char *kstr, + int klen, pem_password_cb *callback, void *u) { EVP_CIPHER_CTX ctx; int dsize=0,i,j,ret=0; unsigned char *p,*data=NULL; const char *objstr=NULL; -#define PEM_BUFSIZE 1024 char buf[PEM_BUFSIZE]; unsigned char key[EVP_MAX_KEY_LENGTH]; unsigned char iv[EVP_MAX_IV_LENGTH]; @@ -259,12 +357,13 @@ int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x, if ((dsize=i2d(x,NULL)) < 0) { - PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE); + PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB); dsize=0; goto err; } /* dzise + 8 bytes are needed */ - data=(unsigned char *)Malloc((unsigned int)dsize+20); + /* actually it needs the cipher block size extra... */ + data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20); if (data == NULL) { PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE); @@ -278,34 +377,48 @@ int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x, if (kstr == NULL) { if (callback == NULL) - klen=def_callback(buf,PEM_BUFSIZE,1); + klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u); else - klen=(*callback)(buf,PEM_BUFSIZE,1); + klen=(*callback)(buf,PEM_BUFSIZE,1,u); if (klen <= 0) { PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY); goto err; } +#ifdef CHARSET_EBCDIC + /* Convert the pass phrase from EBCDIC */ + ebcdic2ascii(buf, buf, klen); +#endif kstr=(unsigned char *)buf; } - RAND_seed(data,i);/* put in the RSA key. */ - RAND_bytes(iv,8); /* Generate a salt */ + RAND_add(data,i,0);/* put in the RSA key. */ + OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); + if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */ + goto err; /* The 'iv' is used as the iv and as a salt. It is * NOT taken from the BytesToKey function */ - EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL); + if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL)) + goto err; - if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE); + if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE); + + OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf); buf[0]='\0'; PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); - PEM_dek_info(buf,objstr,8,(char *)iv); + PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv); /* k=strlen(buf); */ - - EVP_EncryptInit(&ctx,enc,key,iv); - EVP_EncryptUpdate(&ctx,data,&j,data,i); - EVP_EncryptFinal(&ctx,&(data[j]),&i); + + EVP_CIPHER_CTX_init(&ctx); + ret = 1; + if (!EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv) + || !EVP_EncryptUpdate(&ctx,data,&j,data,i) + || !EVP_EncryptFinal_ex(&ctx,&(data[j]),&i)) + ret = 0; + EVP_CIPHER_CTX_cleanup(&ctx); + if (ret == 0) + goto err; i+=j; - ret=1; } else { @@ -315,17 +428,20 @@ int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x, i=PEM_write_bio(bp,name,buf,data,i); if (i <= 0) ret=0; err: - memset(key,0,sizeof(key)); - memset(iv,0,sizeof(iv)); - memset((char *)&ctx,0,sizeof(ctx)); - memset(buf,0,PEM_BUFSIZE); - memset(data,0,(unsigned int)dsize); - Free(data); + OPENSSL_cleanse(key,sizeof(key)); + OPENSSL_cleanse(iv,sizeof(iv)); + OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); + OPENSSL_cleanse(buf,PEM_BUFSIZE); + if (data != NULL) + { + OPENSSL_cleanse(data,(unsigned int)dsize); + OPENSSL_free(data); + } return(ret); } int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, - pem_password_cb *callback) + pem_password_cb *callback,void *u) { int i,j,o,klen; long len; @@ -337,24 +453,33 @@ int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, if (cipher->cipher == NULL) return(1); if (callback == NULL) - klen=def_callback(buf,PEM_BUFSIZE,0); + klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u); else - klen=callback(buf,PEM_BUFSIZE,0); + klen=callback(buf,PEM_BUFSIZE,0,u); if (klen <= 0) { PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ); return(0); } - EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), - (unsigned char *)buf,klen,1,key,NULL); +#ifdef CHARSET_EBCDIC + /* Convert the pass phrase from EBCDIC */ + ebcdic2ascii(buf, buf, klen); +#endif + + if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), + (unsigned char *)buf,klen,1,key,NULL)) + return 0; j=(int)len; - EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0])); - EVP_DecryptUpdate(&ctx,data,&i,data,j); - o=EVP_DecryptFinal(&ctx,&(data[i]),&j); + EVP_CIPHER_CTX_init(&ctx); + o = EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0])); + if (o) + o = EVP_DecryptUpdate(&ctx,data,&i,data,j); + if (o) + o = EVP_DecryptFinal_ex(&ctx,&(data[i]),&j); EVP_CIPHER_CTX_cleanup(&ctx); - memset((char *)buf,0,sizeof(buf)); - memset((char *)key,0,sizeof(key)); + OPENSSL_cleanse((char *)buf,sizeof(buf)); + OPENSSL_cleanse((char *)key,sizeof(key)); j+=i; if (!o) { @@ -367,9 +492,9 @@ int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) { - int o; const EVP_CIPHER *enc=NULL; char *p,c; + char **header_pp = &header; cipher->cipher=NULL; if ((header == NULL) || (*header == '\0') || (*header == '\n')) @@ -394,13 +519,18 @@ int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) for (;;) { c= *header; +#ifndef CHARSET_EBCDIC if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || ((c >= '0') && (c <= '9')))) break; +#else + if (!( isupper(c) || (c == '-') || + isdigit(c))) + break; +#endif header++; } *header='\0'; - o=OBJ_sn2nid(p); cipher->cipher=enc=EVP_get_cipherbyname(p); *header=c; header++; @@ -410,15 +540,16 @@ int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION); return(0); } - if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0); + if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len)) + return(0); return(1); } -static int load_iv(unsigned char **fromp, unsigned char *to, int num) +static int load_iv(char **fromp, unsigned char *to, int num) { int v,i; - unsigned char *from; + char *from; from= *fromp; for (i=0; i 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; - Free(buf); + OPENSSL_cleanse(buf, PEM_BUFSIZE*8); + OPENSSL_free(buf); + buf = NULL; if ( (BIO_write(bp,"-----END ",9) != 9) || (BIO_write(bp,name,nlen) != nlen) || (BIO_write(bp,"-----\n",6) != 6)) goto err; return(i+outl); err: + if (buf) { + OPENSSL_cleanse(buf, PEM_BUFSIZE*8); + OPENSSL_free(buf); + } PEMerr(PEM_F_PEM_WRITE_BIO,reason); return(0); } -#ifndef NO_FP_API +#ifndef OPENSSL_NO_FP_API int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len) { @@ -552,6 +689,9 @@ int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, dataB=BUF_MEM_new(); if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { + BUF_MEM_free(nameB); + BUF_MEM_free(headerB); + BUF_MEM_free(dataB); PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); return(0); } @@ -629,7 +769,7 @@ int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, if (strncmp(buf,"-----END ",9) == 0) break; if (i > 65) break; - if (!BUF_MEM_grow(dataB,i+bl+9)) + if (!BUF_MEM_grow_clean(dataB,i+bl+9)) { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; @@ -688,9 +828,9 @@ int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, *header=headerB->data; *data=(unsigned char *)dataB->data; *len=bl; - Free(nameB); - Free(headerB); - Free(dataB); + OPENSSL_free(nameB); + OPENSSL_free(headerB); + OPENSSL_free(dataB); return(1); err: BUF_MEM_free(nameB); @@ -698,3 +838,25 @@ err: BUF_MEM_free(dataB); return(0); } + +/* Check pem string and return prefix length. + * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" + * the return value is 3 for the string "RSA". + */ + +int pem_check_suffix(const char *pem_str, const char *suffix) + { + int pem_len = strlen(pem_str); + int suffix_len = strlen(suffix); + const char *p; + if (suffix_len + 1 >= pem_len) + return 0; + p = pem_str + pem_len - suffix_len; + if (strcmp(p, suffix)) + return 0; + p--; + if (*p != ' ') + return 0; + return p - pem_str; + } +