diff options
Diffstat (limited to 'contrib/pgcrypto/sha2.c')
| -rw-r--r-- | contrib/pgcrypto/sha2.c | 139 |
1 files changed, 100 insertions, 39 deletions
diff --git a/contrib/pgcrypto/sha2.c b/contrib/pgcrypto/sha2.c index 19febaa1199..98e1fc1964d 100644 --- a/contrib/pgcrypto/sha2.c +++ b/contrib/pgcrypto/sha2.c @@ -33,7 +33,7 @@ * * $From: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $ * - * $PostgreSQL: pgsql/contrib/pgcrypto/sha2.c,v 1.6 2006/05/30 12:56:45 momjian Exp $ + * $PostgreSQL: pgsql/contrib/pgcrypto/sha2.c,v 1.7 2006/07/13 04:15:25 neilc Exp $ */ #include "postgres.h" @@ -189,6 +189,18 @@ static const uint32 K256[64] = { 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL }; +/* Initial hash value H for SHA-224: */ +static const uint32 sha224_initial_hash_value[8] = { + 0xc1059ed8UL, + 0x367cd507UL, + 0x3070dd17UL, + 0xf70e5939UL, + 0xffc00b31UL, + 0x68581511UL, + 0x64f98fa7UL, + 0xbefa4fa4UL +}; + /* Initial hash value H for SHA-256: */ static const uint32 sha256_initial_hash_value[8] = { 0x6a09e667UL, @@ -521,55 +533,61 @@ SHA256_Update(SHA256_CTX * context, const uint8 *data, size_t len) usedspace = freespace = 0; } -void -SHA256_Final(uint8 digest[], SHA256_CTX * context) +static void +SHA256_Last(SHA256_CTX *context) { unsigned int usedspace; - /* If no digest buffer is passed, we don't bother doing this: */ - if (digest != NULL) - { - usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH; + usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH; #if BYTE_ORDER == LITTLE_ENDIAN - /* Convert FROM host byte order */ - REVERSE64(context->bitcount, context->bitcount); + /* Convert FROM host byte order */ + REVERSE64(context->bitcount, context->bitcount); #endif - if (usedspace > 0) - { - /* Begin padding with a 1 bit: */ - context->buffer[usedspace++] = 0x80; + if (usedspace > 0) + { + /* Begin padding with a 1 bit: */ + context->buffer[usedspace++] = 0x80; - if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) - { - /* Set-up for the last transform: */ - memset(&context->buffer[usedspace], 0, SHA256_SHORT_BLOCK_LENGTH - usedspace); - } - else - { - if (usedspace < SHA256_BLOCK_LENGTH) - { - memset(&context->buffer[usedspace], 0, SHA256_BLOCK_LENGTH - usedspace); - } - /* Do second-to-last transform: */ - SHA256_Transform(context, context->buffer); - - /* And set-up for the last transform: */ - memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH); - } + if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) + { + /* Set-up for the last transform: */ + memset(&context->buffer[usedspace], 0, SHA256_SHORT_BLOCK_LENGTH - usedspace); } else { - /* Set-up for the last transform: */ - memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH); + if (usedspace < SHA256_BLOCK_LENGTH) + { + memset(&context->buffer[usedspace], 0, SHA256_BLOCK_LENGTH - usedspace); + } + /* Do second-to-last transform: */ + SHA256_Transform(context, context->buffer); - /* Begin padding with a 1 bit: */ - *context->buffer = 0x80; + /* And set-up for the last transform: */ + memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH); } - /* Set the bit count: */ - *(uint64 *) &context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount; + } + else + { + /* Set-up for the last transform: */ + memset(context->buffer, 0, SHA256_SHORT_BLOCK_LENGTH); + + /* Begin padding with a 1 bit: */ + *context->buffer = 0x80; + } + /* Set the bit count: */ + *(uint64 *) &context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount; - /* Final transform: */ - SHA256_Transform(context, context->buffer); + /* Final transform: */ + SHA256_Transform(context, context->buffer); +} + +void +SHA256_Final(uint8 digest[], SHA256_CTX * context) +{ + /* If no digest buffer is passed, we don't bother doing this: */ + if (digest != NULL) + { + SHA256_Last(context); #if BYTE_ORDER == LITTLE_ENDIAN { @@ -587,7 +605,6 @@ SHA256_Final(uint8 digest[], SHA256_CTX * context) /* Clean up state data: */ memset(context, 0, sizeof(*context)); - usedspace = 0; } @@ -963,3 +980,47 @@ SHA384_Final(uint8 digest[], SHA384_CTX * context) /* Zero out state data */ memset(context, 0, sizeof(*context)); } + +/*** SHA-224: *********************************************************/ +void +SHA224_Init(SHA224_CTX * context) +{ + if (context == NULL) + return; + memcpy(context->state, sha224_initial_hash_value, SHA256_DIGEST_LENGTH); + memset(context->buffer, 0, SHA256_BLOCK_LENGTH); + context->bitcount = 0; +} + +void +SHA224_Update(SHA224_CTX * context, const uint8 *data, size_t len) +{ + SHA256_Update((SHA256_CTX *) context, data, len); +} + +void +SHA224_Final(uint8 digest[], SHA224_CTX * context) +{ + /* If no digest buffer is passed, we don't bother doing this: */ + if (digest != NULL) + { + SHA256_Last(context); + +#if BYTE_ORDER == LITTLE_ENDIAN + { + /* Convert TO host byte order */ + int j; + + for (j = 0; j < 8; j++) + { + REVERSE32(context->state[j], context->state[j]); + } + } +#endif + memcpy(digest, context->state, SHA224_DIGEST_LENGTH); + } + + /* Clean up state data: */ + memset(context, 0, sizeof(*context)); +} + |