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Diffstat (limited to 'bitmask_android/openssl/crypto/evp/encode.c')
| -rw-r--r-- | bitmask_android/openssl/crypto/evp/encode.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/bitmask_android/openssl/crypto/evp/encode.c b/bitmask_android/openssl/crypto/evp/encode.c new file mode 100644 index 00000000..28546a84 --- /dev/null +++ b/bitmask_android/openssl/crypto/evp/encode.c @@ -0,0 +1,445 @@ +/* crypto/evp/encode.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 "cryptlib.h" +#include <openssl/evp.h> + +#ifndef CHARSET_EBCDIC +#define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f]) +#define conv_ascii2bin(a) (data_ascii2bin[(a)&0x7f]) +#else +/* We assume that PEM encoded files are EBCDIC files + * (i.e., printable text files). Convert them here while decoding. + * When encoding, output is EBCDIC (text) format again. + * (No need for conversion in the conv_bin2ascii macro, as the + * underlying textstring data_bin2ascii[] is already EBCDIC) + */ +#define conv_bin2ascii(a) (data_bin2ascii[(a)&0x3f]) +#define conv_ascii2bin(a) (data_ascii2bin[os_toascii[a]&0x7f]) +#endif + +/* 64 char lines + * pad input with 0 + * left over chars are set to = + * 1 byte => xx== + * 2 bytes => xxx= + * 3 bytes => xxxx + */ +#define BIN_PER_LINE (64/4*3) +#define CHUNKS_PER_LINE (64/4) +#define CHAR_PER_LINE (64+1) + +static const unsigned char data_bin2ascii[65]="ABCDEFGHIJKLMNOPQRSTUVWXYZ\ +abcdefghijklmnopqrstuvwxyz0123456789+/"; + +/* 0xF0 is a EOLN + * 0xF1 is ignore but next needs to be 0xF0 (for \r\n processing). + * 0xF2 is EOF + * 0xE0 is ignore at start of line. + * 0xFF is error + */ + +#define B64_EOLN 0xF0 +#define B64_CR 0xF1 +#define B64_EOF 0xF2 +#define B64_WS 0xE0 +#define B64_ERROR 0xFF +#define B64_NOT_BASE64(a) (((a)|0x13) == 0xF3) + +static const unsigned char data_ascii2bin[128]={ + 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, + 0xFF,0xE0,0xF0,0xFF,0xFF,0xF1,0xFF,0xFF, + 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, + 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, + 0xE0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, + 0xFF,0xFF,0xFF,0x3E,0xFF,0xF2,0xFF,0x3F, + 0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B, + 0x3C,0x3D,0xFF,0xFF,0xFF,0x00,0xFF,0xFF, + 0xFF,0x00,0x01,0x02,0x03,0x04,0x05,0x06, + 0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E, + 0x0F,0x10,0x11,0x12,0x13,0x14,0x15,0x16, + 0x17,0x18,0x19,0xFF,0xFF,0xFF,0xFF,0xFF, + 0xFF,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20, + 0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28, + 0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30, + 0x31,0x32,0x33,0xFF,0xFF,0xFF,0xFF,0xFF, + }; + +void EVP_EncodeInit(EVP_ENCODE_CTX *ctx) + { + ctx->length=48; + ctx->num=0; + ctx->line_num=0; + } + +void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, + const unsigned char *in, int inl) + { + int i,j; + unsigned int total=0; + + *outl=0; + if (inl == 0) return; + OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data)); + if ((ctx->num+inl) < ctx->length) + { + memcpy(&(ctx->enc_data[ctx->num]),in,inl); + ctx->num+=inl; + return; + } + if (ctx->num != 0) + { + i=ctx->length-ctx->num; + memcpy(&(ctx->enc_data[ctx->num]),in,i); + in+=i; + inl-=i; + j=EVP_EncodeBlock(out,ctx->enc_data,ctx->length); + ctx->num=0; + out+=j; + *(out++)='\n'; + *out='\0'; + total=j+1; + } + while (inl >= ctx->length) + { + j=EVP_EncodeBlock(out,in,ctx->length); + in+=ctx->length; + inl-=ctx->length; + out+=j; + *(out++)='\n'; + *out='\0'; + total+=j+1; + } + if (inl != 0) + memcpy(&(ctx->enc_data[0]),in,inl); + ctx->num=inl; + *outl=total; + } + +void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) + { + unsigned int ret=0; + + if (ctx->num != 0) + { + ret=EVP_EncodeBlock(out,ctx->enc_data,ctx->num); + out[ret++]='\n'; + out[ret]='\0'; + ctx->num=0; + } + *outl=ret; + } + +int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen) + { + int i,ret=0; + unsigned long l; + + for (i=dlen; i > 0; i-=3) + { + if (i >= 3) + { + l= (((unsigned long)f[0])<<16L)| + (((unsigned long)f[1])<< 8L)|f[2]; + *(t++)=conv_bin2ascii(l>>18L); + *(t++)=conv_bin2ascii(l>>12L); + *(t++)=conv_bin2ascii(l>> 6L); + *(t++)=conv_bin2ascii(l ); + } + else + { + l=((unsigned long)f[0])<<16L; + if (i == 2) l|=((unsigned long)f[1]<<8L); + + *(t++)=conv_bin2ascii(l>>18L); + *(t++)=conv_bin2ascii(l>>12L); + *(t++)=(i == 1)?'=':conv_bin2ascii(l>> 6L); + *(t++)='='; + } + ret+=4; + f+=3; + } + + *t='\0'; + return(ret); + } + +void EVP_DecodeInit(EVP_ENCODE_CTX *ctx) + { + ctx->length=30; + ctx->num=0; + ctx->line_num=0; + ctx->expect_nl=0; + } + +/* -1 for error + * 0 for last line + * 1 for full line + */ +int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, + const unsigned char *in, int inl) + { + int seof= -1,eof=0,rv= -1,ret=0,i,v,tmp,n,ln,exp_nl; + unsigned char *d; + + n=ctx->num; + d=ctx->enc_data; + ln=ctx->line_num; + exp_nl=ctx->expect_nl; + + /* last line of input. */ + if ((inl == 0) || ((n == 0) && (conv_ascii2bin(in[0]) == B64_EOF))) + { rv=0; goto end; } + + /* We parse the input data */ + for (i=0; i<inl; i++) + { + /* If the current line is > 80 characters, scream alot */ + if (ln >= 80) { rv= -1; goto end; } + + /* Get char and put it into the buffer */ + tmp= *(in++); + v=conv_ascii2bin(tmp); + /* only save the good data :-) */ + if (!B64_NOT_BASE64(v)) + { + OPENSSL_assert(n < (int)sizeof(ctx->enc_data)); + d[n++]=tmp; + ln++; + } + else if (v == B64_ERROR) + { + rv= -1; + goto end; + } + + /* have we seen a '=' which is 'definitly' the last + * input line. seof will point to the character that + * holds it. and eof will hold how many characters to + * chop off. */ + if (tmp == '=') + { + if (seof == -1) seof=n; + eof++; + } + + if (v == B64_CR) + { + ln = 0; + if (exp_nl) + continue; + } + + /* eoln */ + if (v == B64_EOLN) + { + ln=0; + if (exp_nl) + { + exp_nl=0; + continue; + } + } + exp_nl=0; + + /* If we are at the end of input and it looks like a + * line, process it. */ + if (((i+1) == inl) && (((n&3) == 0) || eof)) + { + v=B64_EOF; + /* In case things were given us in really small + records (so two '=' were given in separate + updates), eof may contain the incorrect number + of ending bytes to skip, so let's redo the count */ + eof = 0; + if (d[n-1] == '=') eof++; + if (d[n-2] == '=') eof++; + /* There will never be more than two '=' */ + } + + if ((v == B64_EOF && (n&3) == 0) || (n >= 64)) + { + /* This is needed to work correctly on 64 byte input + * lines. We process the line and then need to + * accept the '\n' */ + if ((v != B64_EOF) && (n >= 64)) exp_nl=1; + if (n > 0) + { + v=EVP_DecodeBlock(out,d,n); + n=0; + if (v < 0) { rv=0; goto end; } + ret+=(v-eof); + } + else + { + eof=1; + v=0; + } + + /* This is the case where we have had a short + * but valid input line */ + if ((v < ctx->length) && eof) + { + rv=0; + goto end; + } + else + ctx->length=v; + + if (seof >= 0) { rv=0; goto end; } + out+=v; + } + } + rv=1; +end: + *outl=ret; + ctx->num=n; + ctx->line_num=ln; + ctx->expect_nl=exp_nl; + return(rv); + } + +int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n) + { + int i,ret=0,a,b,c,d; + unsigned long l; + + /* trim white space from the start of the line. */ + while ((conv_ascii2bin(*f) == B64_WS) && (n > 0)) + { + f++; + n--; + } + + /* strip off stuff at the end of the line + * ascii2bin values B64_WS, B64_EOLN, B64_EOLN and B64_EOF */ + while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n-1])))) + n--; + + if (n%4 != 0) return(-1); + + for (i=0; i<n; i+=4) + { + a=conv_ascii2bin(*(f++)); + b=conv_ascii2bin(*(f++)); + c=conv_ascii2bin(*(f++)); + d=conv_ascii2bin(*(f++)); + if ( (a & 0x80) || (b & 0x80) || + (c & 0x80) || (d & 0x80)) + return(-1); + l=( (((unsigned long)a)<<18L)| + (((unsigned long)b)<<12L)| + (((unsigned long)c)<< 6L)| + (((unsigned long)d) )); + *(t++)=(unsigned char)(l>>16L)&0xff; + *(t++)=(unsigned char)(l>> 8L)&0xff; + *(t++)=(unsigned char)(l )&0xff; + ret+=3; + } + return(ret); + } + +int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) + { + int i; + + *outl=0; + if (ctx->num != 0) + { + i=EVP_DecodeBlock(out,ctx->enc_data,ctx->num); + if (i < 0) return(-1); + ctx->num=0; + *outl=i; + return(1); + } + else + return(1); + } + +#ifdef undef +int EVP_DecodeValid(unsigned char *buf, int len) + { + int i,num=0,bad=0; + + if (len == 0) return(-1); + while (conv_ascii2bin(*buf) == B64_WS) + { + buf++; + len--; + if (len == 0) return(-1); + } + + for (i=len; i >= 4; i-=4) + { + if ( (conv_ascii2bin(buf[0]) >= 0x40) || + (conv_ascii2bin(buf[1]) >= 0x40) || + (conv_ascii2bin(buf[2]) >= 0x40) || + (conv_ascii2bin(buf[3]) >= 0x40)) + return(-1); + buf+=4; + num+=1+(buf[2] != '=')+(buf[3] != '='); + } + if ((i == 1) && (conv_ascii2bin(buf[0]) == B64_EOLN)) + return(num); + if ((i == 2) && (conv_ascii2bin(buf[0]) == B64_EOLN) && + (conv_ascii2bin(buf[0]) == B64_EOLN)) + return(num); + return(1); + } +#endif |