| /* crypto/pem/pem_lib.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <assert.h> |
| #include <ctype.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <openssl/base64.h> |
| #include <openssl/buf.h> |
| #include <openssl/des.h> |
| #include <openssl/err.h> |
| #include <openssl/evp.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/pem.h> |
| #include <openssl/rand.h> |
| #include <openssl/x509.h> |
| |
| #include "../evp/internal.h" |
| |
| |
| #define MIN_LENGTH 4 |
| |
| 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); |
| |
| void PEM_proc_type(char *buf, int type) |
| { |
| const char *str; |
| |
| if (type == PEM_TYPE_ENCRYPTED) |
| str="ENCRYPTED"; |
| else if (type == PEM_TYPE_MIC_CLEAR) |
| str="MIC-CLEAR"; |
| else if (type == PEM_TYPE_MIC_ONLY) |
| str="MIC-ONLY"; |
| else |
| str="BAD-TYPE"; |
| |
| 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 const unsigned char map[17]="0123456789ABCDEF"; |
| long i; |
| int j; |
| |
| 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<len; i++) |
| { |
| buf[j+i*2] =map[(str[i]>>4)&0x0f]; |
| buf[j+i*2+1]=map[(str[i] )&0x0f]; |
| } |
| buf[j+i*2]='\n'; |
| buf[j+i*2+1]='\0'; |
| } |
| |
| #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; |
| void *ret; |
| |
| if ((b=BIO_new(BIO_s_file())) == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_read, ERR_R_BUF_LIB); |
| return(0); |
| } |
| BIO_set_fp(b,fp,BIO_NOCLOSE); |
| ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u); |
| BIO_free(b); |
| return(ret); |
| } |
| #endif |
| |
| 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; |
| 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 *data=NULL; |
| long len; |
| int ret = 0; |
| |
| for (;;) |
| { |
| 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,u)) goto err; |
| |
| *pdata = data; |
| *plen = len; |
| |
| if (pnm) |
| *pnm = nm; |
| |
| ret = 1; |
| |
| err: |
| if (!ret || !pnm) OPENSSL_free(nm); |
| OPENSSL_free(header); |
| if (!ret) OPENSSL_free(data); |
| return ret; |
| } |
| |
| #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; |
| |
| if ((b=BIO_new(BIO_s_file())) == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_write, ERR_R_BUF_LIB); |
| return(0); |
| } |
| BIO_set_fp(b,fp,BIO_NOCLOSE); |
| 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(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; |
| char buf[PEM_BUFSIZE]; |
| unsigned char key[EVP_MAX_KEY_LENGTH]; |
| unsigned char iv[EVP_MAX_IV_LENGTH]; |
| |
| if (enc != NULL) |
| { |
| objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc)); |
| if (objstr == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_write_bio, PEM_R_UNSUPPORTED_CIPHER); |
| goto err; |
| } |
| } |
| |
| if ((dsize=i2d(x,NULL)) < 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_write_bio, ERR_R_ASN1_LIB); |
| dsize=0; |
| goto err; |
| } |
| /* dzise + 8 bytes are needed */ |
| /* actually it needs the cipher block size extra... */ |
| data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20); |
| if (data == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_write_bio, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| p=data; |
| i=i2d(x,&p); |
| |
| if (enc != NULL) |
| { |
| const unsigned iv_len = EVP_CIPHER_iv_length(enc); |
| |
| if (kstr == NULL) |
| { |
| klen = 0; |
| if (callback) |
| klen=(*callback)(buf,PEM_BUFSIZE,1,u); |
| if (klen <= 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_ASN1_write_bio, PEM_R_READ_KEY); |
| goto err; |
| } |
| kstr=(unsigned char *)buf; |
| } |
| assert(iv_len <= (int)sizeof(iv)); |
| if (!RAND_bytes(iv, iv_len)) /* Generate a salt */ |
| goto err; |
| /* The 'iv' is used as the iv and as a salt. It is |
| * NOT taken from the BytesToKey function */ |
| if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL)) |
| goto err; |
| |
| if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE); |
| |
| assert(strlen(objstr)+23+2*iv_len+13 <= sizeof buf); |
| |
| buf[0]='\0'; |
| PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); |
| PEM_dek_info(buf,objstr,iv_len,(char *)iv); |
| /* k=strlen(buf); */ |
| |
| 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; |
| } |
| else |
| { |
| ret=1; |
| buf[0]='\0'; |
| } |
| i=PEM_write_bio(bp,name,buf,data,i); |
| if (i <= 0) ret=0; |
| err: |
| 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,void *u) |
| { |
| int i=0,j,o,klen; |
| long len; |
| EVP_CIPHER_CTX ctx; |
| unsigned char key[EVP_MAX_KEY_LENGTH]; |
| char buf[PEM_BUFSIZE]; |
| |
| len= *plen; |
| |
| if (cipher->cipher == NULL) return(1); |
| |
| klen = 0; |
| if (callback) |
| klen=callback(buf,PEM_BUFSIZE,0,u); |
| if (klen <= 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_do_header, PEM_R_BAD_PASSWORD_READ); |
| return(0); |
| } |
| |
| if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), |
| (unsigned char *)buf,klen,1,key,NULL)) |
| return 0; |
| |
| j=(int)len; |
| 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); |
| OPENSSL_cleanse((char *)buf,sizeof(buf)); |
| OPENSSL_cleanse((char *)key,sizeof(key)); |
| if (!o) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_do_header, PEM_R_BAD_DECRYPT); |
| return(0); |
| } |
| j+=i; |
| *plen=j; |
| return(1); |
| } |
| |
| static const EVP_CIPHER* cipher_by_name(const char *name) { |
| if (strcmp(name, "DES-CBC") == 0) { |
| return EVP_des_cbc(); |
| } else if (strcmp(name, "AES-128-CBC") == 0) { |
| return EVP_aes_128_cbc(); |
| } else if (strcmp(name, "AES-256-CBC") == 0) { |
| return EVP_aes_256_cbc(); |
| } else { |
| return NULL; |
| } |
| } |
| |
| int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
| { |
| const EVP_CIPHER *enc=NULL; |
| char *p,c; |
| char **header_pp = &header; |
| |
| cipher->cipher=NULL; |
| if ((header == NULL) || (*header == '\0') || (*header == '\n')) |
| return(1); |
| if (strncmp(header,"Proc-Type: ",11) != 0) |
| { OPENSSL_PUT_ERROR(PEM, PEM_get_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); return(0); } |
| header+=11; |
| if (*header != '4') return(0); header++; |
| if (*header != ',') return(0); header++; |
| if (strncmp(header,"ENCRYPTED",9) != 0) |
| { OPENSSL_PUT_ERROR(PEM, PEM_get_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); return(0); } |
| for (; (*header != '\n') && (*header != '\0'); header++) |
| ; |
| if (*header == '\0') |
| { OPENSSL_PUT_ERROR(PEM, PEM_get_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); return(0); } |
| header++; |
| if (strncmp(header,"DEK-Info: ",10) != 0) |
| { OPENSSL_PUT_ERROR(PEM, PEM_get_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); return(0); } |
| header+=10; |
| |
| p=header; |
| for (;;) |
| { |
| c= *header; |
| if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || |
| ((c >= '0') && (c <= '9')))) |
| break; |
| header++; |
| } |
| *header='\0'; |
| cipher->cipher=enc=cipher_by_name(p); |
| *header=c; |
| header++; |
| |
| if (enc == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_get_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); |
| return(0); |
| } |
| if (!load_iv(header_pp,&(cipher->iv[0]),EVP_CIPHER_iv_length(enc))) |
| return(0); |
| |
| return(1); |
| } |
| |
| static int load_iv(char **fromp, unsigned char *to, int num) |
| { |
| int v,i; |
| char *from; |
| |
| from= *fromp; |
| for (i=0; i<num; i++) to[i]=0; |
| num*=2; |
| for (i=0; i<num; i++) |
| { |
| if ((*from >= '0') && (*from <= '9')) |
| v= *from-'0'; |
| else if ((*from >= 'A') && (*from <= 'F')) |
| v= *from-'A'+10; |
| else if ((*from >= 'a') && (*from <= 'f')) |
| v= *from-'a'+10; |
| else |
| { |
| OPENSSL_PUT_ERROR(PEM, load_iv, PEM_R_BAD_IV_CHARS); |
| return(0); |
| } |
| from++; |
| to[i/2]|=v<<(long)((!(i&1))*4); |
| } |
| |
| *fromp=from; |
| return(1); |
| } |
| |
| #ifndef OPENSSL_NO_FP_API |
| int PEM_write(FILE *fp, const char *name, const char *header, |
| const unsigned char *data, long len) |
| { |
| BIO *b; |
| int ret; |
| |
| if ((b=BIO_new(BIO_s_file())) == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_write, ERR_R_BUF_LIB); |
| return(0); |
| } |
| BIO_set_fp(b,fp,BIO_NOCLOSE); |
| ret=PEM_write_bio(b, name, header, data,len); |
| BIO_free(b); |
| return(ret); |
| } |
| #endif |
| |
| int PEM_write_bio(BIO *bp, const char *name, const char *header, |
| const unsigned char *data, long len) |
| { |
| int nlen,n,i,j,outl; |
| unsigned char *buf = NULL; |
| EVP_ENCODE_CTX ctx; |
| int reason=ERR_R_BUF_LIB; |
| |
| EVP_EncodeInit(&ctx); |
| nlen=strlen(name); |
| |
| if ( (BIO_write(bp,"-----BEGIN ",11) != 11) || |
| (BIO_write(bp,name,nlen) != nlen) || |
| (BIO_write(bp,"-----\n",6) != 6)) |
| goto err; |
| |
| i=strlen(header); |
| if (i > 0) |
| { |
| if ( (BIO_write(bp,header,i) != i) || |
| (BIO_write(bp,"\n",1) != 1)) |
| goto err; |
| } |
| |
| buf = OPENSSL_malloc(PEM_BUFSIZE*8); |
| if (buf == NULL) |
| { |
| reason=ERR_R_MALLOC_FAILURE; |
| goto err; |
| } |
| |
| i=j=0; |
| while (len > 0) |
| { |
| n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len); |
| EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n); |
| if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl)) |
| goto err; |
| i+=outl; |
| len-=n; |
| j+=n; |
| } |
| EVP_EncodeFinal(&ctx,buf,&outl); |
| if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; |
| 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); |
| } |
| OPENSSL_PUT_ERROR(PEM, PEM_write_bio, reason); |
| return(0); |
| } |
| |
| #ifndef OPENSSL_NO_FP_API |
| int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
| long *len) |
| { |
| BIO *b; |
| int ret; |
| |
| if ((b=BIO_new(BIO_s_file())) == NULL) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read, ERR_R_BUF_LIB); |
| return(0); |
| } |
| BIO_set_fp(b,fp,BIO_NOCLOSE); |
| ret=PEM_read_bio(b, name, header, data,len); |
| BIO_free(b); |
| return(ret); |
| } |
| #endif |
| |
| int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, |
| long *len) |
| { |
| EVP_ENCODE_CTX ctx; |
| int end=0,i,k,bl=0,hl=0,nohead=0; |
| char buf[256]; |
| BUF_MEM *nameB; |
| BUF_MEM *headerB; |
| BUF_MEM *dataB,*tmpB; |
| |
| nameB=BUF_MEM_new(); |
| headerB=BUF_MEM_new(); |
| dataB=BUF_MEM_new(); |
| if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) |
| { |
| BUF_MEM_free(nameB); |
| BUF_MEM_free(headerB); |
| BUF_MEM_free(dataB); |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); |
| return(0); |
| } |
| |
| buf[254]='\0'; |
| for (;;) |
| { |
| i=BIO_gets(bp,buf,254); |
| |
| if (i <= 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, PEM_R_NO_START_LINE); |
| goto err; |
| } |
| |
| while ((i >= 0) && (buf[i] <= ' ')) i--; |
| buf[++i]='\n'; buf[++i]='\0'; |
| |
| if (strncmp(buf,"-----BEGIN ",11) == 0) |
| { |
| i=strlen(&(buf[11])); |
| |
| if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0) |
| continue; |
| if (!BUF_MEM_grow(nameB,i+9)) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| memcpy(nameB->data,&(buf[11]),i-6); |
| nameB->data[i-6]='\0'; |
| break; |
| } |
| } |
| hl=0; |
| if (!BUF_MEM_grow(headerB,256)) |
| { OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); goto err; } |
| headerB->data[0]='\0'; |
| for (;;) |
| { |
| i=BIO_gets(bp,buf,254); |
| if (i <= 0) break; |
| |
| while ((i >= 0) && (buf[i] <= ' ')) i--; |
| buf[++i]='\n'; buf[++i]='\0'; |
| |
| if (buf[0] == '\n') break; |
| if (!BUF_MEM_grow(headerB,hl+i+9)) |
| { OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); goto err; } |
| if (strncmp(buf,"-----END ",9) == 0) |
| { |
| nohead=1; |
| break; |
| } |
| memcpy(&(headerB->data[hl]),buf,i); |
| headerB->data[hl+i]='\0'; |
| hl+=i; |
| } |
| |
| bl=0; |
| if (!BUF_MEM_grow(dataB,1024)) |
| { OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); goto err; } |
| dataB->data[0]='\0'; |
| if (!nohead) |
| { |
| for (;;) |
| { |
| i=BIO_gets(bp,buf,254); |
| if (i <= 0) break; |
| |
| while ((i >= 0) && (buf[i] <= ' ')) i--; |
| buf[++i]='\n'; buf[++i]='\0'; |
| |
| if (i != 65) end=1; |
| if (strncmp(buf,"-----END ",9) == 0) |
| break; |
| if (i > 65) break; |
| if (!BUF_MEM_grow_clean(dataB,i+bl+9)) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| memcpy(&(dataB->data[bl]),buf,i); |
| dataB->data[bl+i]='\0'; |
| bl+=i; |
| if (end) |
| { |
| buf[0]='\0'; |
| i=BIO_gets(bp,buf,254); |
| if (i <= 0) break; |
| |
| while ((i >= 0) && (buf[i] <= ' ')) i--; |
| buf[++i]='\n'; buf[++i]='\0'; |
| |
| break; |
| } |
| } |
| } |
| else |
| { |
| tmpB=headerB; |
| headerB=dataB; |
| dataB=tmpB; |
| bl=hl; |
| } |
| i=strlen(nameB->data); |
| if ( (strncmp(buf,"-----END ",9) != 0) || |
| (strncmp(nameB->data,&(buf[9]),i) != 0) || |
| (strncmp(&(buf[9+i]),"-----\n",6) != 0)) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, PEM_R_BAD_END_LINE); |
| goto err; |
| } |
| |
| EVP_DecodeInit(&ctx); |
| i=EVP_DecodeUpdate(&ctx, |
| (unsigned char *)dataB->data,&bl, |
| (unsigned char *)dataB->data,bl); |
| if (i < 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, PEM_R_BAD_BASE64_DECODE); |
| goto err; |
| } |
| i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k); |
| if (i < 0) |
| { |
| OPENSSL_PUT_ERROR(PEM, PEM_read_bio, PEM_R_BAD_BASE64_DECODE); |
| goto err; |
| } |
| bl+=k; |
| |
| if (bl == 0) goto err; |
| *name=nameB->data; |
| *header=headerB->data; |
| *data=(unsigned char *)dataB->data; |
| *len=bl; |
| OPENSSL_free(nameB); |
| OPENSSL_free(headerB); |
| OPENSSL_free(dataB); |
| return(1); |
| err: |
| BUF_MEM_free(nameB); |
| BUF_MEM_free(headerB); |
| 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; |
| } |
| |