155714Skris/* crypto/evp/bio_b64.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296465Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296465Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include <errno.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/buffer.h> 6355714Skris#include <openssl/evp.h> 6455714Skris 6568651Skrisstatic int b64_write(BIO *h, const char *buf, int num); 6668651Skrisstatic int b64_read(BIO *h, char *buf, int size); 67215697Ssimonstatic int b64_puts(BIO *h, const char *str); 68296465Sdelphij/* 69296465Sdelphij * static int b64_gets(BIO *h, char *str, int size); 70296465Sdelphij */ 7168651Skrisstatic long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2); 7255714Skrisstatic int b64_new(BIO *h); 7355714Skrisstatic int b64_free(BIO *data); 74296465Sdelphijstatic long b64_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); 75296465Sdelphij#define B64_BLOCK_SIZE 1024 76296465Sdelphij#define B64_BLOCK_SIZE2 768 77296465Sdelphij#define B64_NONE 0 78296465Sdelphij#define B64_ENCODE 1 79296465Sdelphij#define B64_DECODE 2 8055714Skris 81296465Sdelphijtypedef struct b64_struct { 82296465Sdelphij /* 83296465Sdelphij * BIO *bio; moved to the BIO structure 84296465Sdelphij */ 85296465Sdelphij int buf_len; 86296465Sdelphij int buf_off; 87296465Sdelphij int tmp_len; /* used to find the start when decoding */ 88296465Sdelphij int tmp_nl; /* If true, scan until '\n' */ 89296465Sdelphij int encode; 90296465Sdelphij int start; /* have we started decoding yet? */ 91296465Sdelphij int cont; /* <= 0 when finished */ 92296465Sdelphij EVP_ENCODE_CTX base64; 93296465Sdelphij char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE) + 10]; 94296465Sdelphij char tmp[B64_BLOCK_SIZE]; 95296465Sdelphij} BIO_B64_CTX; 9655714Skris 97296465Sdelphijstatic BIO_METHOD methods_b64 = { 98296465Sdelphij BIO_TYPE_BASE64, "base64 encoding", 99296465Sdelphij b64_write, 100296465Sdelphij b64_read, 101296465Sdelphij b64_puts, 102296465Sdelphij NULL, /* b64_gets, */ 103296465Sdelphij b64_ctrl, 104296465Sdelphij b64_new, 105296465Sdelphij b64_free, 106296465Sdelphij b64_callback_ctrl, 107296465Sdelphij}; 10855714Skris 10955714SkrisBIO_METHOD *BIO_f_base64(void) 110296465Sdelphij{ 111296465Sdelphij return (&methods_b64); 112296465Sdelphij} 11355714Skris 11455714Skrisstatic int b64_new(BIO *bi) 115296465Sdelphij{ 116296465Sdelphij BIO_B64_CTX *ctx; 11755714Skris 118296465Sdelphij ctx = (BIO_B64_CTX *)OPENSSL_malloc(sizeof(BIO_B64_CTX)); 119296465Sdelphij if (ctx == NULL) 120296465Sdelphij return (0); 12155714Skris 122296465Sdelphij ctx->buf_len = 0; 123296465Sdelphij ctx->tmp_len = 0; 124296465Sdelphij ctx->tmp_nl = 0; 125296465Sdelphij ctx->buf_off = 0; 126296465Sdelphij ctx->cont = 1; 127296465Sdelphij ctx->start = 1; 128296465Sdelphij ctx->encode = 0; 12955714Skris 130296465Sdelphij bi->init = 1; 131296465Sdelphij bi->ptr = (char *)ctx; 132296465Sdelphij bi->flags = 0; 133296465Sdelphij bi->num = 0; 134296465Sdelphij return (1); 135296465Sdelphij} 13655714Skris 13755714Skrisstatic int b64_free(BIO *a) 138296465Sdelphij{ 139296465Sdelphij if (a == NULL) 140296465Sdelphij return (0); 141296465Sdelphij OPENSSL_free(a->ptr); 142296465Sdelphij a->ptr = NULL; 143296465Sdelphij a->init = 0; 144296465Sdelphij a->flags = 0; 145296465Sdelphij return (1); 146296465Sdelphij} 147296465Sdelphij 14855714Skrisstatic int b64_read(BIO *b, char *out, int outl) 149296465Sdelphij{ 150296465Sdelphij int ret = 0, i, ii, j, k, x, n, num, ret_code = 0; 151296465Sdelphij BIO_B64_CTX *ctx; 152296465Sdelphij unsigned char *p, *q; 15355714Skris 154296465Sdelphij if (out == NULL) 155296465Sdelphij return (0); 156296465Sdelphij ctx = (BIO_B64_CTX *)b->ptr; 15755714Skris 158296465Sdelphij if ((ctx == NULL) || (b->next_bio == NULL)) 159296465Sdelphij return (0); 16055714Skris 161296465Sdelphij BIO_clear_retry_flags(b); 162215697Ssimon 163296465Sdelphij if (ctx->encode != B64_DECODE) { 164296465Sdelphij ctx->encode = B64_DECODE; 165296465Sdelphij ctx->buf_len = 0; 166296465Sdelphij ctx->buf_off = 0; 167296465Sdelphij ctx->tmp_len = 0; 168296465Sdelphij EVP_DecodeInit(&(ctx->base64)); 169296465Sdelphij } 17055714Skris 171296465Sdelphij /* First check if there are bytes decoded/encoded */ 172296465Sdelphij if (ctx->buf_len > 0) { 173296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 174296465Sdelphij i = ctx->buf_len - ctx->buf_off; 175296465Sdelphij if (i > outl) 176296465Sdelphij i = outl; 177296465Sdelphij OPENSSL_assert(ctx->buf_off + i < (int)sizeof(ctx->buf)); 178296465Sdelphij memcpy(out, &(ctx->buf[ctx->buf_off]), i); 179296465Sdelphij ret = i; 180296465Sdelphij out += i; 181296465Sdelphij outl -= i; 182296465Sdelphij ctx->buf_off += i; 183296465Sdelphij if (ctx->buf_len == ctx->buf_off) { 184296465Sdelphij ctx->buf_len = 0; 185296465Sdelphij ctx->buf_off = 0; 186296465Sdelphij } 187296465Sdelphij } 18855714Skris 189296465Sdelphij /* 190296465Sdelphij * At this point, we have room of outl bytes and an empty buffer, so we 191296465Sdelphij * should read in some more. 192296465Sdelphij */ 19355714Skris 194296465Sdelphij ret_code = 0; 195296465Sdelphij while (outl > 0) { 196296465Sdelphij if (ctx->cont <= 0) 197296465Sdelphij break; 198120631Snectar 199296465Sdelphij i = BIO_read(b->next_bio, &(ctx->tmp[ctx->tmp_len]), 200296465Sdelphij B64_BLOCK_SIZE - ctx->tmp_len); 20155714Skris 202296465Sdelphij if (i <= 0) { 203296465Sdelphij ret_code = i; 20455714Skris 205296465Sdelphij /* Should we continue next time we are called? */ 206296465Sdelphij if (!BIO_should_retry(b->next_bio)) { 207296465Sdelphij ctx->cont = i; 208296465Sdelphij /* If buffer empty break */ 209296465Sdelphij if (ctx->tmp_len == 0) 210296465Sdelphij break; 211296465Sdelphij /* Fall through and process what we have */ 212296465Sdelphij else 213296465Sdelphij i = 0; 214296465Sdelphij } 215296465Sdelphij /* else we retry and add more data to buffer */ 216296465Sdelphij else 217296465Sdelphij break; 218296465Sdelphij } 219296465Sdelphij i += ctx->tmp_len; 220296465Sdelphij ctx->tmp_len = i; 22155714Skris 222296465Sdelphij /* 223296465Sdelphij * We need to scan, a line at a time until we have a valid line if we 224296465Sdelphij * are starting. 225296465Sdelphij */ 226296465Sdelphij if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)) { 227296465Sdelphij /* ctx->start=1; */ 228296465Sdelphij ctx->tmp_len = 0; 229296465Sdelphij } else if (ctx->start) { 230296465Sdelphij q = p = (unsigned char *)ctx->tmp; 231296465Sdelphij num = 0; 232296465Sdelphij for (j = 0; j < i; j++) { 233296465Sdelphij if (*(q++) != '\n') 234296465Sdelphij continue; 23555714Skris 236296465Sdelphij /* 237296465Sdelphij * due to a previous very long line, we need to keep on 238296465Sdelphij * scanning for a '\n' before we even start looking for 239296465Sdelphij * base64 encoded stuff. 240296465Sdelphij */ 241296465Sdelphij if (ctx->tmp_nl) { 242296465Sdelphij p = q; 243296465Sdelphij ctx->tmp_nl = 0; 244296465Sdelphij continue; 245296465Sdelphij } 24655714Skris 247296465Sdelphij k = EVP_DecodeUpdate(&(ctx->base64), 248296465Sdelphij (unsigned char *)ctx->buf, 249296465Sdelphij &num, p, q - p); 250296465Sdelphij if ((k <= 0) && (num == 0) && (ctx->start)) 251296465Sdelphij EVP_DecodeInit(&ctx->base64); 252296465Sdelphij else { 253296465Sdelphij if (p != (unsigned char *) 254296465Sdelphij &(ctx->tmp[0])) { 255296465Sdelphij i -= (p - (unsigned char *) 256296465Sdelphij &(ctx->tmp[0])); 257296465Sdelphij for (x = 0; x < i; x++) 258296465Sdelphij ctx->tmp[x] = p[x]; 259296465Sdelphij } 260296465Sdelphij EVP_DecodeInit(&ctx->base64); 261296465Sdelphij ctx->start = 0; 262296465Sdelphij break; 263296465Sdelphij } 264296465Sdelphij p = q; 265296465Sdelphij } 26655714Skris 267296465Sdelphij /* we fell off the end without starting */ 268296465Sdelphij if ((j == i) && (num == 0)) { 269296465Sdelphij /* 270296465Sdelphij * Is this is one long chunk?, if so, keep on reading until a 271296465Sdelphij * new line. 272296465Sdelphij */ 273296465Sdelphij if (p == (unsigned char *)&(ctx->tmp[0])) { 274296465Sdelphij /* Check buffer full */ 275296465Sdelphij if (i == B64_BLOCK_SIZE) { 276296465Sdelphij ctx->tmp_nl = 1; 277296465Sdelphij ctx->tmp_len = 0; 278296465Sdelphij } 279296465Sdelphij } else if (p != q) { /* finished on a '\n' */ 280296465Sdelphij n = q - p; 281296465Sdelphij for (ii = 0; ii < n; ii++) 282296465Sdelphij ctx->tmp[ii] = p[ii]; 283296465Sdelphij ctx->tmp_len = n; 284296465Sdelphij } 285296465Sdelphij /* else finished on a '\n' */ 286296465Sdelphij continue; 287296465Sdelphij } else { 288296465Sdelphij ctx->tmp_len = 0; 289296465Sdelphij } 290296465Sdelphij } else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0)) { 291296465Sdelphij /* 292296465Sdelphij * If buffer isn't full and we can retry then restart to read in 293296465Sdelphij * more data. 294296465Sdelphij */ 295296465Sdelphij continue; 296296465Sdelphij } 29755714Skris 298296465Sdelphij if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) { 299296465Sdelphij int z, jj; 30055714Skris 301215697Ssimon#if 0 302296465Sdelphij jj = (i >> 2) << 2; 303215697Ssimon#else 304296465Sdelphij jj = i & ~3; /* process per 4 */ 305215697Ssimon#endif 306296465Sdelphij z = EVP_DecodeBlock((unsigned char *)ctx->buf, 307296465Sdelphij (unsigned char *)ctx->tmp, jj); 308296465Sdelphij if (jj > 2) { 309296465Sdelphij if (ctx->tmp[jj - 1] == '=') { 310296465Sdelphij z--; 311296465Sdelphij if (ctx->tmp[jj - 2] == '=') 312296465Sdelphij z--; 313296465Sdelphij } 314296465Sdelphij } 315296465Sdelphij /* 316296465Sdelphij * z is now number of output bytes and jj is the number consumed 317296465Sdelphij */ 318296465Sdelphij if (jj != i) { 319296465Sdelphij memmove(ctx->tmp, &ctx->tmp[jj], i - jj); 320296465Sdelphij ctx->tmp_len = i - jj; 321296465Sdelphij } 322296465Sdelphij ctx->buf_len = 0; 323296465Sdelphij if (z > 0) { 324296465Sdelphij ctx->buf_len = z; 325296465Sdelphij } 326296465Sdelphij i = z; 327296465Sdelphij } else { 328296465Sdelphij i = EVP_DecodeUpdate(&(ctx->base64), 329296465Sdelphij (unsigned char *)ctx->buf, &ctx->buf_len, 330296465Sdelphij (unsigned char *)ctx->tmp, i); 331296465Sdelphij ctx->tmp_len = 0; 332296465Sdelphij } 333296465Sdelphij ctx->buf_off = 0; 334296465Sdelphij if (i < 0) { 335296465Sdelphij ret_code = 0; 336296465Sdelphij ctx->buf_len = 0; 337296465Sdelphij break; 338296465Sdelphij } 33955714Skris 340296465Sdelphij if (ctx->buf_len <= outl) 341296465Sdelphij i = ctx->buf_len; 342296465Sdelphij else 343296465Sdelphij i = outl; 34455714Skris 345296465Sdelphij memcpy(out, ctx->buf, i); 346296465Sdelphij ret += i; 347296465Sdelphij ctx->buf_off = i; 348296465Sdelphij if (ctx->buf_off == ctx->buf_len) { 349296465Sdelphij ctx->buf_len = 0; 350296465Sdelphij ctx->buf_off = 0; 351296465Sdelphij } 352296465Sdelphij outl -= i; 353296465Sdelphij out += i; 354296465Sdelphij } 355296465Sdelphij /* BIO_clear_retry_flags(b); */ 356296465Sdelphij BIO_copy_next_retry(b); 357296465Sdelphij return ((ret == 0) ? ret_code : ret); 358296465Sdelphij} 35955714Skris 36068651Skrisstatic int b64_write(BIO *b, const char *in, int inl) 361296465Sdelphij{ 362296465Sdelphij int ret = 0; 363296465Sdelphij int n; 364296465Sdelphij int i; 365296465Sdelphij BIO_B64_CTX *ctx; 36655714Skris 367296465Sdelphij ctx = (BIO_B64_CTX *)b->ptr; 368296465Sdelphij BIO_clear_retry_flags(b); 36955714Skris 370296465Sdelphij if (ctx->encode != B64_ENCODE) { 371296465Sdelphij ctx->encode = B64_ENCODE; 372296465Sdelphij ctx->buf_len = 0; 373296465Sdelphij ctx->buf_off = 0; 374296465Sdelphij ctx->tmp_len = 0; 375296465Sdelphij EVP_EncodeInit(&(ctx->base64)); 376296465Sdelphij } 37755714Skris 378296465Sdelphij OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf)); 379296465Sdelphij OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); 380296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 381296465Sdelphij n = ctx->buf_len - ctx->buf_off; 382296465Sdelphij while (n > 0) { 383296465Sdelphij i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n); 384296465Sdelphij if (i <= 0) { 385296465Sdelphij BIO_copy_next_retry(b); 386296465Sdelphij return (i); 387296465Sdelphij } 388296465Sdelphij OPENSSL_assert(i <= n); 389296465Sdelphij ctx->buf_off += i; 390296465Sdelphij OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf)); 391296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 392296465Sdelphij n -= i; 393296465Sdelphij } 394296465Sdelphij /* at this point all pending data has been written */ 395296465Sdelphij ctx->buf_off = 0; 396296465Sdelphij ctx->buf_len = 0; 39755714Skris 398296465Sdelphij if ((in == NULL) || (inl <= 0)) 399296465Sdelphij return (0); 40055714Skris 401296465Sdelphij while (inl > 0) { 402296465Sdelphij n = (inl > B64_BLOCK_SIZE) ? B64_BLOCK_SIZE : inl; 40355714Skris 404296465Sdelphij if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) { 405296465Sdelphij if (ctx->tmp_len > 0) { 406296465Sdelphij OPENSSL_assert(ctx->tmp_len <= 3); 407296465Sdelphij n = 3 - ctx->tmp_len; 408296465Sdelphij /* 409296465Sdelphij * There's a theoretical possibility for this 410296465Sdelphij */ 411296465Sdelphij if (n > inl) 412296465Sdelphij n = inl; 413296465Sdelphij memcpy(&(ctx->tmp[ctx->tmp_len]), in, n); 414296465Sdelphij ctx->tmp_len += n; 415296465Sdelphij ret += n; 416296465Sdelphij if (ctx->tmp_len < 3) 417296465Sdelphij break; 418296465Sdelphij ctx->buf_len = 419296465Sdelphij EVP_EncodeBlock((unsigned char *)ctx->buf, 420296465Sdelphij (unsigned char *)ctx->tmp, ctx->tmp_len); 421296465Sdelphij OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); 422296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 423296465Sdelphij /* 424296465Sdelphij * Since we're now done using the temporary buffer, the 425296465Sdelphij * length should be 0'd 426296465Sdelphij */ 427296465Sdelphij ctx->tmp_len = 0; 428296465Sdelphij } else { 429296465Sdelphij if (n < 3) { 430296465Sdelphij memcpy(ctx->tmp, in, n); 431296465Sdelphij ctx->tmp_len = n; 432296465Sdelphij ret += n; 433296465Sdelphij break; 434296465Sdelphij } 435296465Sdelphij n -= n % 3; 436296465Sdelphij ctx->buf_len = 437296465Sdelphij EVP_EncodeBlock((unsigned char *)ctx->buf, 438296465Sdelphij (const unsigned char *)in, n); 439296465Sdelphij OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); 440296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 441296465Sdelphij ret += n; 442296465Sdelphij } 443296465Sdelphij } else { 444296465Sdelphij EVP_EncodeUpdate(&(ctx->base64), 445296465Sdelphij (unsigned char *)ctx->buf, &ctx->buf_len, 446296465Sdelphij (unsigned char *)in, n); 447296465Sdelphij OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf)); 448296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 449296465Sdelphij ret += n; 450296465Sdelphij } 451296465Sdelphij inl -= n; 452296465Sdelphij in += n; 45355714Skris 454296465Sdelphij ctx->buf_off = 0; 455296465Sdelphij n = ctx->buf_len; 456296465Sdelphij while (n > 0) { 457296465Sdelphij i = BIO_write(b->next_bio, &(ctx->buf[ctx->buf_off]), n); 458296465Sdelphij if (i <= 0) { 459296465Sdelphij BIO_copy_next_retry(b); 460296465Sdelphij return ((ret == 0) ? i : ret); 461296465Sdelphij } 462296465Sdelphij OPENSSL_assert(i <= n); 463296465Sdelphij n -= i; 464296465Sdelphij ctx->buf_off += i; 465296465Sdelphij OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf)); 466296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 467296465Sdelphij } 468296465Sdelphij ctx->buf_len = 0; 469296465Sdelphij ctx->buf_off = 0; 470296465Sdelphij } 471296465Sdelphij return (ret); 472296465Sdelphij} 47355714Skris 47468651Skrisstatic long b64_ctrl(BIO *b, int cmd, long num, void *ptr) 475296465Sdelphij{ 476296465Sdelphij BIO_B64_CTX *ctx; 477296465Sdelphij long ret = 1; 478296465Sdelphij int i; 47955714Skris 480296465Sdelphij ctx = (BIO_B64_CTX *)b->ptr; 48155714Skris 482296465Sdelphij switch (cmd) { 483296465Sdelphij case BIO_CTRL_RESET: 484296465Sdelphij ctx->cont = 1; 485296465Sdelphij ctx->start = 1; 486296465Sdelphij ctx->encode = B64_NONE; 487296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 488296465Sdelphij break; 489296465Sdelphij case BIO_CTRL_EOF: /* More to read */ 490296465Sdelphij if (ctx->cont <= 0) 491296465Sdelphij ret = 1; 492296465Sdelphij else 493296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 494296465Sdelphij break; 495296465Sdelphij case BIO_CTRL_WPENDING: /* More to write in buffer */ 496296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 497296465Sdelphij ret = ctx->buf_len - ctx->buf_off; 498296465Sdelphij if ((ret == 0) && (ctx->encode != B64_NONE) 499296465Sdelphij && (ctx->base64.num != 0)) 500296465Sdelphij ret = 1; 501296465Sdelphij else if (ret <= 0) 502296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 503296465Sdelphij break; 504296465Sdelphij case BIO_CTRL_PENDING: /* More to read in buffer */ 505296465Sdelphij OPENSSL_assert(ctx->buf_len >= ctx->buf_off); 506296465Sdelphij ret = ctx->buf_len - ctx->buf_off; 507296465Sdelphij if (ret <= 0) 508296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 509296465Sdelphij break; 510296465Sdelphij case BIO_CTRL_FLUSH: 511296465Sdelphij /* do a final write */ 512296465Sdelphij again: 513296465Sdelphij while (ctx->buf_len != ctx->buf_off) { 514296465Sdelphij i = b64_write(b, NULL, 0); 515296465Sdelphij if (i < 0) 516296465Sdelphij return i; 517296465Sdelphij } 518296465Sdelphij if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL) { 519296465Sdelphij if (ctx->tmp_len != 0) { 520296465Sdelphij ctx->buf_len = EVP_EncodeBlock((unsigned char *)ctx->buf, 521296465Sdelphij (unsigned char *)ctx->tmp, 522296465Sdelphij ctx->tmp_len); 523296465Sdelphij ctx->buf_off = 0; 524296465Sdelphij ctx->tmp_len = 0; 525296465Sdelphij goto again; 526296465Sdelphij } 527296465Sdelphij } else if (ctx->encode != B64_NONE && ctx->base64.num != 0) { 528296465Sdelphij ctx->buf_off = 0; 529296465Sdelphij EVP_EncodeFinal(&(ctx->base64), 530296465Sdelphij (unsigned char *)ctx->buf, &(ctx->buf_len)); 531296465Sdelphij /* push out the bytes */ 532296465Sdelphij goto again; 533296465Sdelphij } 534296465Sdelphij /* Finally flush the underlying BIO */ 535296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 536296465Sdelphij break; 53755714Skris 538296465Sdelphij case BIO_C_DO_STATE_MACHINE: 539296465Sdelphij BIO_clear_retry_flags(b); 540296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 541296465Sdelphij BIO_copy_next_retry(b); 542296465Sdelphij break; 54355714Skris 544296465Sdelphij case BIO_CTRL_DUP: 545296465Sdelphij break; 546296465Sdelphij case BIO_CTRL_INFO: 547296465Sdelphij case BIO_CTRL_GET: 548296465Sdelphij case BIO_CTRL_SET: 549296465Sdelphij default: 550296465Sdelphij ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 551296465Sdelphij break; 552296465Sdelphij } 553296465Sdelphij return (ret); 554296465Sdelphij} 55555714Skris 55668651Skrisstatic long b64_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) 557296465Sdelphij{ 558296465Sdelphij long ret = 1; 55959191Skris 560296465Sdelphij if (b->next_bio == NULL) 561296465Sdelphij return (0); 562296465Sdelphij switch (cmd) { 563296465Sdelphij default: 564296465Sdelphij ret = BIO_callback_ctrl(b->next_bio, cmd, fp); 565296465Sdelphij break; 566296465Sdelphij } 567296465Sdelphij return (ret); 568296465Sdelphij} 56959191Skris 570215697Ssimonstatic int b64_puts(BIO *b, const char *str) 571296465Sdelphij{ 572296465Sdelphij return b64_write(b, str, strlen(str)); 573296465Sdelphij} 574