diff options
Diffstat (limited to 'thirdparty/openssl/crypto/pem/pem_lib.c')
| -rw-r--r-- | thirdparty/openssl/crypto/pem/pem_lib.c | 865 |
1 files changed, 865 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/pem/pem_lib.c b/thirdparty/openssl/crypto/pem/pem_lib.c new file mode 100644 index 0000000000..fe881d6641 --- /dev/null +++ b/thirdparty/openssl/crypto/pem/pem_lib.c @@ -0,0 +1,865 @@ +/* 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 <stdio.h> +#include <ctype.h> +#include "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 "asn1_locl.h" +#ifndef OPENSSL_NO_DES +# include <openssl/des.h> +#endif +#ifndef OPENSSL_NO_ENGINE +# include <openssl/engine.h> +#endif + +const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT; + +#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) +{ +#ifdef OPENSSL_NO_FP_API + /* + * We should not ever call the default callback routine from windows. + */ + 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) + prompt = "Enter PEM pass phrase:"; + + for (;;) { + i = EVP_read_pw_string_min(buf, MIN_LENGTH, 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 (j < MIN_LENGTH) { + fprintf(stderr, + "phrase is too short, needs to be at least %d chars\n", + MIN_LENGTH); + } 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"; + + 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) { + 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)) + 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 *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) { + 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; + 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 || 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 = (unsigned char *)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(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 + */ + 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 * enc->iv_len + 13 <= + sizeof buf); + + buf[0] = '\0'; + PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); + PEM_dek_info(buf, objstr, enc->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); + if (callback == NULL) + klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); + else + klen = callback(buf, PEM_BUFSIZE, 0, u); + if (klen <= 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, 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_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) + j += i; + else { + PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); + return (0); + } + *plen = j; + return (1); +} + +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) { + PEMerr(PEM_F_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) { + PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); + return (0); + } + for (; (*header != '\n') && (*header != '\0'); header++) ; + if (*header == '\0') { + PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); + return (0); + } + header++; + if (strncmp(header, "DEK-Info: ", 10) != 0) { + PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); + return (0); + } + header += 10; + + p = header; + 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'; + cipher->cipher = enc = EVP_get_cipherbyname(p); + *header = c; + header++; + + if (enc == NULL) { + PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); + return (0); + } + if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) + 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 { + 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_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) { + 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; + 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); + } + PEMerr(PEM_F_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) { + 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; + 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); + PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); + return (0); + } + + 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); + 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; +} |