diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/pem/pem_lib.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/pem/pem_lib.c | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/pem/pem_lib.c b/openssl-1.1.0h/crypto/pem/pem_lib.c new file mode 100644 index 0000000..e9202f4 --- /dev/null +++ b/openssl-1.1.0h/crypto/pem/pem_lib.c @@ -0,0 +1,857 @@ +/* + * 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; + } + /* dsize + 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; +} |