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add base64 encode with esacped line ending, keep existing api intact

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This commit is contained in:
toddouska 2014-01-13 12:17:12 -08:00
parent ef9cfc2172
commit bb6b2e86c6
2 changed files with 42 additions and 6 deletions
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45
ctaocrypt/src/coding.c
View File

@ -147,15 +147,21 @@ const byte base64Encode[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
};
/* porting assistance from yaSSL by Raphael HUCK */
int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
/* internal worker, handles both escaped and normal line endings */
static int DoBase64_Encode(const byte* in, word32 inLen, byte* out,
word32* outLen, int escaped)
{
word32 i = 0,
j = 0,
n = 0; /* new line counter */
word32 outSz = (inLen + 3 - 1) / 3 * 4;
outSz += (outSz + PEM_LINE_SZ - 1) / PEM_LINE_SZ; /* new lines */
word32 addSz = (outSz + PEM_LINE_SZ - 1) / PEM_LINE_SZ; /* new lines */
if (escaped)
addSz *= 3; /* instead of just \n, we're doing %0A triplet */
outSz += addSz;
if (outSz > *outLen) return BAD_FUNC_ARG;
@ -178,8 +184,15 @@ int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
inLen -= 3;
if ((++n % (PEM_LINE_SZ / 4)) == 0 && inLen)
out[i++] = '\n';
if ((++n % (PEM_LINE_SZ / 4)) == 0 && inLen) {
if (escaped) {
out[i++] = '%';
out[i++] = '0';
out[i++] = 'A';
}
else
out[i++] = '\n';
}
}
/* last integral */
@ -199,7 +212,13 @@ int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
out[i++] = PAD;
}
out[i++] = '\n';
if (escaped) {
out[i++] = '%';
out[i++] = '0';
out[i++] = 'A';
}
else
out[i++] = '\n';
if (i != outSz)
return ASN_INPUT_E;
*outLen = outSz;
@ -208,6 +227,20 @@ int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
}
/* Base64 Encode, PEM style, with \n line endings */
int Base64_Encode(const byte* in, word32 inLen, byte* out, word32* outLen)
{
return DoBase64_Encode(in, inLen, out, outLen, 0);
}
/* Base64 Encode, with %0A esacped line endings instead of \n */
int Base64_EncodeEsc(const byte* in, word32 inLen, byte* out, word32* outLen)
{
return DoBase64_Encode(in, inLen, out, outLen, 1);
}
static
const byte hexDecode[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
BAD, BAD, BAD, BAD, BAD, BAD, BAD,

3
cyassl/ctaocrypt/coding.h
View File

@ -39,6 +39,9 @@ CYASSL_LOCAL int Base64_Decode(const byte* in, word32 inLen, byte* out,
CYASSL_API
int Base64_Encode(const byte* in, word32 inLen, byte* out,
word32* outLen);
CYASSL_API
int Base64_EncodeEsc(const byte* in, word32 inLen, byte* out,
word32* outLen);
CYASSL_LOCAL
int Base16_Decode(const byte* in, word32 inLen, byte* out, word32* outLen);
#endif