| /* |
| * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include <ctype.h> |
| #include <string.h> |
| #include "internal/cryptlib.h" |
| #include <openssl/buffer.h> |
| #include <openssl/objects.h> |
| #include <openssl/evp.h> |
| #include <openssl/rand.h> |
| #include <openssl/x509.h> |
| #include <openssl/pem.h> |
| #include <openssl/pkcs12.h> |
| #include "internal/asn1_int.h" |
| #include <openssl/des.h> |
| #include <openssl/engine.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); |
| |
| int PEM_def_callback(char *buf, int num, int w, void *key) |
| { |
| #if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI) |
| int i; |
| #else |
| int i, j; |
| const char *prompt; |
| #endif |
| |
| if (key) { |
| i = strlen(key); |
| i = (i > num) ? num : i; |
| memcpy(buf, key, i); |
| return i; |
| } |
| |
| #if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI) |
| PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| return -1; |
| #else |
| prompt = EVP_get_pw_prompt(); |
| if (prompt == NULL) |
| prompt = "Enter PEM pass phrase:"; |
| |
| for (;;) { |
| /* |
| * We assume that w == 0 means decryption, |
| * while w == 1 means encryption |
| */ |
| int min_len = w ? MIN_LENGTH : 0; |
| |
| i = EVP_read_pw_string_min(buf, min_len, num, prompt, w); |
| if (i != 0) { |
| PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); |
| memset(buf, 0, (unsigned int)num); |
| return -1; |
| } |
| j = strlen(buf); |
| if (min_len && j < min_len) { |
| fprintf(stderr, |
| "phrase is too short, needs to be at least %d chars\n", |
| min_len); |
| } else |
| break; |
| } |
| return j; |
| #endif |
| } |
| |
| 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"; |
| |
| OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); |
| OPENSSL_strlcat(buf, str, PEM_BUFSIZE); |
| OPENSSL_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; |
| |
| OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); |
| OPENSSL_strlcat(buf, type, PEM_BUFSIZE); |
| OPENSSL_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_STDIO |
| 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) { |
| PEMerr(PEM_F_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) == 0) |
| return 1; |
| |
| /* Make PEM_STRING_EVP_PKEY match any private key */ |
| |
| if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { |
| int slen; |
| const EVP_PKEY_ASN1_METHOD *ameth; |
| if (strcmp(nm, PEM_STRING_PKCS8) == 0) |
| return 1; |
| if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) |
| return 1; |
| slen = pem_check_suffix(nm, "PRIVATE KEY"); |
| if (slen > 0) { |
| /* |
| * NB: ENGINE implementations won't 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) == 0) { |
| 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 |
| ENGINE_finish(e); |
| #endif |
| return r; |
| } |
| } |
| return 0; |
| } |
| /* If reading DH parameters handle X9.42 DH format too */ |
| if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 |
| && strcmp(name, PEM_STRING_DHPARAMS) == 0) |
| return 1; |
| |
| /* Permit older strings */ |
| |
| if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
| && strcmp(name, PEM_STRING_X509) == 0) |
| return 1; |
| |
| if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 |
| && strcmp(name, PEM_STRING_X509_REQ) == 0) |
| return 1; |
| |
| /* Allow normal certs to be read as trusted certs */ |
| if (strcmp(nm, PEM_STRING_X509) == 0 |
| && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) |
| return 1; |
| |
| if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
| && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) |
| return 1; |
| |
| /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
| if (strcmp(nm, PEM_STRING_X509) == 0 |
| && strcmp(name, PEM_STRING_PKCS7) == 0) |
| return 1; |
| |
| if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 |
| && strcmp(name, PEM_STRING_PKCS7) == 0) |
| return 1; |
| |
| #ifndef OPENSSL_NO_CMS |
| if (strcmp(nm, PEM_STRING_X509) == 0 |
| && strcmp(name, PEM_STRING_CMS) == 0) |
| return 1; |
| /* Allow CMS to be read from PKCS#7 headers */ |
| if (strcmp(nm, PEM_STRING_PKCS7) == 0 |
| && strcmp(name, PEM_STRING_CMS) == 0) |
| 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_STDIO |
| 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) { |
| PEMerr(PEM_F_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 = NULL; |
| int dsize = 0, i = 0, j = 0, 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 || EVP_CIPHER_iv_length(enc) == 0) { |
| PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); |
| goto err; |
| } |
| } |
| |
| if ((dsize = i2d(x, NULL)) < 0) { |
| PEMerr(PEM_F_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 = OPENSSL_malloc((unsigned int)dsize + 20); |
| if (data == NULL) { |
| PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| p = data; |
| i = i2d(x, &p); |
| |
| if (enc != NULL) { |
| if (kstr == NULL) { |
| if (callback == NULL) |
| klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); |
| else |
| 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_add(data, i, 0); /* put in the RSA key. */ |
| OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv)); |
| if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 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 |
| */ |
| if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) |
| goto err; |
| |
| if (kstr == (unsigned char *)buf) |
| OPENSSL_cleanse(buf, PEM_BUFSIZE); |
| |
| OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13 |
| <= sizeof buf); |
| |
| buf[0] = '\0'; |
| PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); |
| PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv); |
| /* k=strlen(buf); */ |
| |
| ret = 1; |
| if ((ctx = EVP_CIPHER_CTX_new()) == NULL |
| || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv) |
| || !EVP_EncryptUpdate(ctx, data, &j, data, i) |
| || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i)) |
| ret = 0; |
| 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)); |
| EVP_CIPHER_CTX_free(ctx); |
| OPENSSL_cleanse(buf, PEM_BUFSIZE); |
| OPENSSL_clear_free(data, (unsigned int)dsize); |
| return (ret); |
| } |
| |
| int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
| pem_password_cb *callback, void *u) |
| { |
| int ok; |
| int keylen; |
| long len = *plen; |
| int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */ |
| EVP_CIPHER_CTX *ctx; |
| unsigned char key[EVP_MAX_KEY_LENGTH]; |
| char buf[PEM_BUFSIZE]; |
| |
| #if LONG_MAX > INT_MAX |
| /* Check that we did not truncate the length */ |
| if (len > INT_MAX) { |
| PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG); |
| return 0; |
| } |
| #endif |
| |
| if (cipher->cipher == NULL) |
| return 1; |
| if (callback == NULL) |
| keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); |
| else |
| keylen = callback(buf, PEM_BUFSIZE, 0, u); |
| if (keylen <= 0) { |
| PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); |
| return 0; |
| } |
| #ifdef CHARSET_EBCDIC |
| /* Convert the pass phrase from EBCDIC */ |
| ebcdic2ascii(buf, buf, keylen); |
| #endif |
| |
| if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
| (unsigned char *)buf, keylen, 1, key, NULL)) |
| return 0; |
| |
| ctx = EVP_CIPHER_CTX_new(); |
| if (ctx == NULL) |
| return 0; |
| |
| ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); |
| if (ok) |
| ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen); |
| if (ok) { |
| /* Squirrel away the length of data decrypted so far. */ |
| *plen = ilen; |
| ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen); |
| } |
| if (ok) |
| *plen += ilen; |
| else |
| PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); |
| |
| EVP_CIPHER_CTX_free(ctx); |
| OPENSSL_cleanse((char *)buf, sizeof(buf)); |
| OPENSSL_cleanse((char *)key, sizeof(key)); |
| return ok; |
| } |
| |
| /* |
| * This implements a very limited PEM header parser that does not support the |
| * full grammar of rfc1421. In particular, folded headers are not supported, |
| * nor is additional whitespace. |
| * |
| * A robust implementation would make use of a library that turns the headers |
| * into a BIO from which one folded line is read at a time, and is then split |
| * into a header label and content. We would then parse the content of the |
| * headers we care about. This is overkill for just this limited use-case, but |
| * presumably we also parse rfc822-style headers for S/MIME, so a common |
| * abstraction might well be more generally useful. |
| */ |
| int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
| { |
| static const char ProcType[] = "Proc-Type:"; |
| static const char ENCRYPTED[] = "ENCRYPTED"; |
| static const char DEKInfo[] = "DEK-Info:"; |
| const EVP_CIPHER *enc = NULL; |
| int ivlen; |
| char *dekinfostart, c; |
| |
| cipher->cipher = NULL; |
| if ((header == NULL) || (*header == '\0') || (*header == '\n')) |
| return 1; |
| |
| if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); |
| return 0; |
| } |
| header += sizeof(ProcType)-1; |
| header += strspn(header, " \t"); |
| |
| if (*header++ != '4' || *header++ != ',') |
| return 0; |
| header += strspn(header, " \t"); |
| |
| /* We expect "ENCRYPTED" followed by optional white-space + line break */ |
| if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 || |
| strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); |
| return 0; |
| } |
| header += sizeof(ENCRYPTED)-1; |
| header += strspn(header, " \t\r"); |
| if (*header++ != '\n') { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); |
| return 0; |
| } |
| |
| /*- |
| * https://tools.ietf.org/html/rfc1421#section-4.6.1.3 |
| * We expect "DEK-Info: algo[,hex-parameters]" |
| */ |
| if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); |
| return 0; |
| } |
| header += sizeof(DEKInfo)-1; |
| header += strspn(header, " \t"); |
| |
| /* |
| * DEK-INFO is a comma-separated combination of algorithm name and optional |
| * parameters. |
| */ |
| dekinfostart = header; |
| header += strcspn(header, " \t,"); |
| c = *header; |
| *header = '\0'; |
| cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart); |
| *header = c; |
| header += strspn(header, " \t"); |
| |
| if (enc == NULL) { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); |
| return 0; |
| } |
| ivlen = EVP_CIPHER_iv_length(enc); |
| if (ivlen > 0 && *header++ != ',') { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV); |
| return 0; |
| } else if (ivlen == 0 && *header == ',') { |
| PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV); |
| return 0; |
| } |
| |
| if (!load_iv(&header, cipher->iv, 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++) { |
| v = OPENSSL_hexchar2int(*from); |
| if (v < 0) { |
| PEMerr(PEM_F_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_STDIO |
| 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) { |
| PEMerr(PEM_F_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 = EVP_ENCODE_CTX_new(); |
| int reason = ERR_R_BUF_LIB; |
| |
| if (ctx == NULL) { |
| reason = ERR_R_MALLOC_FAILURE; |
| goto err; |
| } |
| |
| 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); |
| if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) |
| goto err; |
| 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; |
| if ((BIO_write(bp, "-----END ", 9) != 9) || |
| (BIO_write(bp, name, nlen) != nlen) || |
| (BIO_write(bp, "-----\n", 6) != 6)) |
| goto err; |
| OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
| EVP_ENCODE_CTX_free(ctx); |
| return (i + outl); |
| err: |
| OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
| EVP_ENCODE_CTX_free(ctx); |
| PEMerr(PEM_F_PEM_WRITE_BIO, reason); |
| return (0); |
| } |
| |
| #ifndef OPENSSL_NO_STDIO |
| 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) { |
| PEMerr(PEM_F_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 = EVP_ENCODE_CTX_new(); |
| int end = 0, i, k, bl = 0, hl = 0, nohead = 0; |
| char buf[256]; |
| BUF_MEM *nameB; |
| BUF_MEM *headerB; |
| BUF_MEM *dataB, *tmpB; |
| |
| if (ctx == NULL) { |
| PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); |
| return (0); |
| } |
| |
| nameB = BUF_MEM_new(); |
| headerB = BUF_MEM_new(); |
| dataB = BUF_MEM_new(); |
| if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { |
| goto err; |
| } |
| |
| buf[254] = '\0'; |
| for (;;) { |
| i = BIO_gets(bp, buf, 254); |
| |
| if (i <= 0) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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)) { |
| PEMerr(PEM_F_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) { |
| PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); |
| goto err; |
| } |
| i = EVP_DecodeFinal(ctx, (unsigned char *)&(dataB->data[bl]), &k); |
| if (i < 0) { |
| PEMerr(PEM_F_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); |
| EVP_ENCODE_CTX_free(ctx); |
| return (1); |
| err: |
| BUF_MEM_free(nameB); |
| BUF_MEM_free(headerB); |
| BUF_MEM_free(dataB); |
| EVP_ENCODE_CTX_free(ctx); |
| 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; |
| } |
